EP0394751A2
Expired / Lapsed
EP
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Cocondensation polyester, process for manufacturing same and uses thereof
Assignee: Mitsui Chemicals Inc
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Filing: 1990-04-10
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Granted: —
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Expires: 2010-04-10
Abstract
Abstract A cocondensation polyester according to the present invention is substantially linear and is composed of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient, (c) diol constituent units comprising ethylene glycol constituent units as their main ingredient, and (d) polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, said polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g and a glass transition temperature of 70°C or higher. A second cocondensation polyester according to the present invention is substantially linear and is composed of the above-mentioned (a) mononuclear aromatic dicarboxylic acid constituent units, (b) binuclear aromatic dicarboxylic acid constituent units, (c) diol constituent units, (d) polyfunctional constituent units, and additional (e) aliphatic dicarboxylic acid constituent units comprising succinic acid constituent units as their main ingredient, said polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g. Furthermore, the present invention provides a process for preparing these cocondasation polyesters, and uses thereof by utilizing excellent gas barrier properties and transparency thereof.
Inventors
- 👤 Hiroshi Wakumoto
- 👤 Tadao Yatsu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 12:07
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/36; C08G63/12; C08G63/16; C08G63/18; C08G63/181; C08G63/185; C08G63/187; C08G63/189; C08G63/78; C08G63/82; C08L; C08L67/00; C08L67/02; B32B2367/00
Claims Analysis
Total Claims: 44
Claim 1
Independent Claim
124 words
A cocondensation polyester which is substantially linear and is composed of (a) 25 to 42 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 8 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient, (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, said polyester having an intrinsic viscosity [ η] of 0.5 to 1.5 dl/g and a glass transition temperature of 70°C or higher.
Claim 2
Dependent Claim
124 words
A cocondensation polyester which is substantially linear and is composed of (a) 25 to 42 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 8 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient, (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, said polyester having an intrinsic viscosity [ η] of 0.5 to 1.5 dl/g and a glass transition temperature of 70°C or higher.
Claim 3
Dependent Claim
191 words
A process for the preparation of a cocondensation polyester composed of 25 to 42 mol% of mononuclear aromatic dicarboxylic acid constituent units (a), 8 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units (b), 48 to 50 mol% of diol constutuent units (c) and 0 to 2 mol% of polyfunctional constutuent units (d), comprising the steps of heating a mixture of (a′) a mononuclear aromatic dicarboxylic acid component comprising isophthalic acid or its ester as the main ingredient thereof, (b′) a binuclear aromatic dicarboxylic acid component comprising 2,6-naphthalenedicarboxylic acid or its ester as the main ingredient thereof, (c′) diols comprising ethylene glycol as their main ingredient, and (d′) a polyfuctional component composed of a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, or of its ester, said heating effecting esterification reaction or ester exchange reaction of the above-described constituents; and conducting cocondensation polymerization reaction at a temperature in the range of 230 to 300°C in the presence of catalyst comprising a phosphorus compound and a compound selected from the group consisting of germanium compounds, antimony compounds and titanium compounds.
Claim 4
Dependent Claim
191 words
A process for the preparation of a cocondensation polyester composed of 25 to 42 mol% of mononuclear aromatic dicarboxylic acid constituent units (a), 8 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units (b), 48 to 50 mol% of diol constutuent units (c) and 0 to 2 mol% of polyfunctional constutuent units (d), comprising the steps of heating a mixture of (a′) a mononuclear aromatic dicarboxylic acid component comprising isophthalic acid or its ester as the main ingredient thereof, (b′) a binuclear aromatic dicarboxylic acid component comprising 2,6-naphthalenedicarboxylic acid or its ester as the main ingredient thereof, (c′) diols comprising ethylene glycol as their main ingredient, and (d′) a polyfuctional component composed of a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, or of its ester, said heating effecting esterification reaction or ester exchange reaction of the above-described constituents; and conducting cocondensation polymerization reaction at a temperature in the range of 230 to 300°C in the presence of catalyst comprising a phosphorus compound and a compound selected from the group consisting of germanium compounds, antimony compounds and titanium compounds.
Claim 5
Dependent Claim
136 words
A cocondensation polyester which is substantially linear and is composed of (a) 2.5 to 45 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 2.5 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient , (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, and (e) 2.0 to 22.5 mol% of aliphatic dicarboxylic acid constituent units comprising succinic acid constituent units as their main ingredient, said polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g.
Claim 6
Dependent Claim
136 words
A cocondensation polyester which is substantially linear and is composed of (a) 2.5 to 45 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 2.5 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient , (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, and (e) 2.0 to 22.5 mol% of aliphatic dicarboxylic acid constituent units comprising succinic acid constituent units as their main ingredient, said polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g.
Claim 7
Dependent Claim
219 words
A process for the preparation of a cocondensation polyester composed of 2.5 to 45 mol% of mononuclear aromatic dicarboxylic acid constituent units (a), 2.5 to 25 mol% of of binuclear aromatic dicarboxylic acid constituent units (b), 48 to 50 mol% of diol constutuent units (c), 0 to 2 mol% of polyfunctional constutuent units (d) and 2.0 to 22.5 mol% of aliphatic dicarboxylic acid constituent units, comprising the steps of heating a mixture of (a′) a mononuclear aromatic dicarboxylic acid component comprising isophthalic acid or its ester as the main ingredient thereof, (b′) a binuclear aromatic dicarboxylic acid component comprising 2,6-naphthalenedicarboxylic acid or its ester as the main ingredient thereof, (c′) diols comprising ethylene glycol as their main ingredient, (d′) a polyfuctional component composed of a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, or of its ester, and (e′) an aliphatic dicarboxylic acid component comprising succinic acid or its ester as the main ingredient thereof, said heating effecting esterification reaction or ester exchange reaction of the above-described components; and conducting cocondensation polymerization reaction at a temperature in the range of 230 to 300°C in the presence of catalyst comrising a phosphorus compound and a compound selected from the group consisting of germanium compounds, antimony compounds and titanium compounds.
Claim 8
Dependent Claim
219 words
A process for the preparation of a cocondensation polyester composed of 2.5 to 45 mol% of mononuclear aromatic dicarboxylic acid constituent units (a), 2.5 to 25 mol% of of binuclear aromatic dicarboxylic acid constituent units (b), 48 to 50 mol% of diol constutuent units (c), 0 to 2 mol% of polyfunctional constutuent units (d) and 2.0 to 22.5 mol% of aliphatic dicarboxylic acid constituent units, comprising the steps of heating a mixture of (a′) a mononuclear aromatic dicarboxylic acid component comprising isophthalic acid or its ester as the main ingredient thereof, (b′) a binuclear aromatic dicarboxylic acid component comprising 2,6-naphthalenedicarboxylic acid or its ester as the main ingredient thereof, (c′) diols comprising ethylene glycol as their main ingredient, (d′) a polyfuctional component composed of a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, or of its ester, and (e′) an aliphatic dicarboxylic acid component comprising succinic acid or its ester as the main ingredient thereof, said heating effecting esterification reaction or ester exchange reaction of the above-described components; and conducting cocondensation polymerization reaction at a temperature in the range of 230 to 300°C in the presence of catalyst comrising a phosphorus compound and a compound selected from the group consisting of germanium compounds, antimony compounds and titanium compounds.
Claim 9
Dependent Claim
129 words
A gas barrier property-imparting agent comprising a cocondensation polyester which is substantially linear and is composed of (a) 25 to 42 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 8 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient, (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, said polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g and a glass transition temperature of 70°C or higher.
Claim 10
Dependent Claim
129 words
A gas barrier property-imparting agent comprising a cocondensation polyester which is substantially linear and is composed of (a) 25 to 42 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 8 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient, (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, said polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g and a glass transition temperature of 70°C or higher.
Claim 11
Dependent Claim
142 words
A gas barrier property-imparting agent comprising a cocondensation polyester which is substantially linear and is composed of (a) 2.5 to 45 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 2.5 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient , (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, and (e) 2.0 to 22.5 mol% of aliphatic dicarboxylic acid constituent units comprising succinic acid constituent units as their main ingredient, said polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g.
Claim 12
Dependent Claim
142 words
A gas barrier property-imparting agent comprising a cocondensation polyester which is substantially linear and is composed of (a) 2.5 to 45 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 2.5 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient , (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, and (e) 2.0 to 22.5 mol% of aliphatic dicarboxylic acid constituent units comprising succinic acid constituent units as their main ingredient, said polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g.
Claim 13
Dependent Claim
145 words
A polyester resin composition comprising a polyalkylene terephthalate containing ethylene terephthalate constituent units as its main ingredient and a cocondensation polyester, wherein said cocondensation polyester is substantially linear and is composed of (a) 25 to 42 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 8 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient, (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g and a glass transition temperature of 70°C or higher.
Claim 14
Dependent Claim
145 words
A polyester resin composition comprising a polyalkylene terephthalate containing ethylene terephthalate constituent units as its main ingredient and a cocondensation polyester, wherein said cocondensation polyester is substantially linear and is composed of (a) 25 to 42 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 8 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient, (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g and a glass transition temperature of 70°C or higher.
Claim 15
Dependent Claim
157 words
A polyester resin composition comprising a polyalkylene terephthalate containing ethylene terephthalate constituent units as its main ingredient and a cocondensation polyester, wherein said cocondensation polyester is substantially linear and is composed of (a) 2.5 to 45 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 2.5 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient , (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, and (e) 2.0 to 22.5 mol% of aliphatic dicarboxylic acid constituent units comprising succinic acid constituent units as their main ingredient, said polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g.
Claim 16
Dependent Claim
157 words
A polyester resin composition comprising a polyalkylene terephthalate containing ethylene terephthalate constituent units as its main ingredient and a cocondensation polyester, wherein said cocondensation polyester is substantially linear and is composed of (a) 2.5 to 45 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 2.5 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient , (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, and (e) 2.0 to 22.5 mol% of aliphatic dicarboxylic acid constituent units comprising succinic acid constituent units as their main ingredient, said polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g.
Claim 17
Dependent Claim
149 words
A stretch molding of a polyester resin composition comprising a polyalkylene terephthalate containing ethylene terephthalate constituent units as its main ingredient and a cocondensation polyester, wherein said cocondensation polyester is substantially linear and is composed of (a) 25 to 42 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 8 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient, (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g and a glass transition temperature of 70°C or higher.
Claim 18
Dependent Claim
149 words
A stretch molding of a polyester resin composition comprising a polyalkylene terephthalate containing ethylene terephthalate constituent units as its main ingredient and a cocondensation polyester, wherein said cocondensation polyester is substantially linear and is composed of (a) 25 to 42 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 8 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient, (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g and a glass transition temperature of 70°C or higher.
Claim 19
Dependent Claim
162 words
A stretch molding of a polyester resin composition comprising a polyalkylene terephthalate containing ethylene terephthalate constituent units as their main ingredient and a cocondensation polyester, wherein said cocondensation polyester is substantially linear and is composed of (a) 2.5 to 45 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 2.5 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient , (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, and (e) 2.0 to 22.5 mol% of aliphatic dicarboxylic acid constituent units comprising succinic acid constituent units as their main ingredient, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g.
Claim 20
Dependent Claim
162 words
A stretch molding of a polyester resin composition comprising a polyalkylene terephthalate containing ethylene terephthalate constituent units as their main ingredient and a cocondensation polyester, wherein said cocondensation polyester is substantially linear and is composed of (a) 2.5 to 45 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 2.5 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient , (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, and (e) 2.0 to 22.5 mol% of aliphatic dicarboxylic acid constituent units comprising succinic acid constituent units as their main ingredient, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g.
Claim 21
Dependent Claim
157 words
A preform for the preparation of a stretch blow molding of a polyester resin composition comprising a polyalkylene terephthalate containing ethylene terephthalate constituent units as their main ingredient and a cocondensation polyester, wherein said cocondensation polyester is substantially linear and is composed of (a) 25 to 42 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 8 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient, (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxy 1 groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g and a glass transition temperature of 70°C or higher.
Claim 22
Dependent Claim
157 words
A preform for the preparation of a stretch blow molding of a polyester resin composition comprising a polyalkylene terephthalate containing ethylene terephthalate constituent units as their main ingredient and a cocondensation polyester, wherein said cocondensation polyester is substantially linear and is composed of (a) 25 to 42 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 8 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient, (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxy 1 groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g and a glass transition temperature of 70°C or higher.
Claim 23
Dependent Claim
168 words
A preform for the preparation of a stretch blow molding of a polyester resin composition comprising a polyalkylene terephthalate containing ethylene terephthalate constituent units as their main ingredient and a cocondensation polyester, wherein said cocondensation polyester is substantially linear and is composed of (a) 2.5 to 45 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 2.5 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient , (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, and (e) 2.0 to 22.5 mol% of aliphatic dicarboxylic acid constituent units comprising succinic acid constituent units as their main ingredient, said polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g.
Claim 24
Dependent Claim
168 words
A preform for the preparation of a stretch blow molding of a polyester resin composition comprising a polyalkylene terephthalate containing ethylene terephthalate constituent units as their main ingredient and a cocondensation polyester, wherein said cocondensation polyester is substantially linear and is composed of (a) 2.5 to 45 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 2.5 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient , (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, and (e) 2.0 to 22.5 mol% of aliphatic dicarboxylic acid constituent units comprising succinic acid constituent units as their main ingredient, said polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g.
Claim 25
Dependent Claim
151 words
A stretch blow molding formed from a polyester resin composition comprising a polyalkylene terephthalate containing ethylene terephthalate constituent units as their main ingredient and a cocondensation polyester, wherein said cocondensation polyester is substantially linear and is composed of (a) 25 to 42 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 8 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient, (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g and a glass transition temperature of 70°C or higher.
Claim 26
Dependent Claim
151 words
A stretch blow molding formed from a polyester resin composition comprising a polyalkylene terephthalate containing ethylene terephthalate constituent units as their main ingredient and a cocondensation polyester, wherein said cocondensation polyester is substantially linear and is composed of (a) 25 to 42 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 8 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient, (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g and a glass transition temperature of 70°C or higher.
Claim 27
Dependent Claim
164 words
A stretch blow molded article of a polyester resin composition comprising a polyalkylene terephthalate containing ethylene terephthalate constituent units as their main ingredient and a cocondensation polyester, wherein said cocondensation polyester is substantially linear and is composed of (a) 2.5 to 45 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 2.5 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient , (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, and (e) 2.0 to 22.5 mol% of aliphatic dicarboxylic acid constituent units comprising succinic acid constituent units as their main ingredient, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g.
Claim 28
Dependent Claim
164 words
A stretch blow molded article of a polyester resin composition comprising a polyalkylene terephthalate containing ethylene terephthalate constituent units as their main ingredient and a cocondensation polyester, wherein said cocondensation polyester is substantially linear and is composed of (a) 2.5 to 45 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 2.5 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient , (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, and (e) 2.0 to 22.5 mol% of aliphatic dicarboxylic acid constituent units comprising succinic acid constituent units as their main ingredient, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g.
Claim 29
Dependent Claim
178 words
A polyester resin laminated molding comprising a layer composed of a cocondensation polyester or a polyseter resin composition layer comprising (i) a polyalkylene terephthalate containing ethylene terephthalate constituent units as its main ingredient and (ii) a cocondensation polyester, and a layer composed of polyalkylene terephthalate comprising ethylene terephthalate constituent units as its main ingredient, wherein said cocondensation polyseter is substantially linear and is composed of (a) 25 to 42 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 8 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient, (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g and a glass transition temperature of 70°C or higher.
Claim 30
Dependent Claim
178 words
A polyester resin laminated molding comprising a layer composed of a cocondensation polyester or a polyseter resin composition layer comprising (i) a polyalkylene terephthalate containing ethylene terephthalate constituent units as its main ingredient and (ii) a cocondensation polyester, and a layer composed of polyalkylene terephthalate comprising ethylene terephthalate constituent units as its main ingredient, wherein said cocondensation polyseter is substantially linear and is composed of (a) 25 to 42 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 8 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient, (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g and a glass transition temperature of 70°C or higher.
Claim 31
Dependent Claim
191 words
A polyester resin laminated molding comprising a layer composed of a cocondensation polyester or a polyester resin composition layer comprising (i) a polyalkylene terephthalate containing ethylene terephthalate constituent units as its main ingredient and (ii) a cocondensation polyester, and a layer composed of polyalkylene terephthalate comprising ethylene terephthalate constituent units as its main ingredient, wherein said cocondensation polyseter is substantially linear and is composed of (a) 2.5 to 45 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 2.5 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient , (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, and (e) 2.0 to 22.5 mol% of aliphatic dicarboxylic acid constituent units comprising succinic acid constituent units as their main ingredient, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g.
Claim 32
Dependent Claim
191 words
A polyester resin laminated molding comprising a layer composed of a cocondensation polyester or a polyester resin composition layer comprising (i) a polyalkylene terephthalate containing ethylene terephthalate constituent units as its main ingredient and (ii) a cocondensation polyester, and a layer composed of polyalkylene terephthalate comprising ethylene terephthalate constituent units as its main ingredient, wherein said cocondensation polyseter is substantially linear and is composed of (a) 2.5 to 45 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 2.5 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient , (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, and (e) 2.0 to 22.5 mol% of aliphatic dicarboxylic acid constituent units comprising succinic acid constituent units as their main ingredient, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g.
Claim 33
Dependent Claim
180 words
A polyester resin stretch laminated molding comprising a layer composed of a cocondensation polyester or a polyseter resin composition layer comprising (i) a polyalkylene terephthalate containing ethylene terephthalate constituent units as its main ingredient and (ii) a cocondensation polyester, and a layer composed of polyalkylene terephthalate comprising ethylene terephthalate constituent units as its main ingredient, wherein said cocondensation polyseter is substantially linear and is composed of (a) 25 to 42 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 8 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient, (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, and (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g and a glass transition temperature of 70°C or higher.
Claim 34
Dependent Claim
180 words
A polyester resin stretch laminated molding comprising a layer composed of a cocondensation polyester or a polyseter resin composition layer comprising (i) a polyalkylene terephthalate containing ethylene terephthalate constituent units as its main ingredient and (ii) a cocondensation polyester, and a layer composed of polyalkylene terephthalate comprising ethylene terephthalate constituent units as its main ingredient, wherein said cocondensation polyseter is substantially linear and is composed of (a) 25 to 42 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 8 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient, (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, and (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g and a glass transition temperature of 70°C or higher.
Claim 35
Dependent Claim
192 words
A polyester resin stretch laminated molding comprising a layer composed of a cocondensation polyester or a polyseter resin composition layer comprising (i) a polyalkylene terephthalate containing ethylene terephthalate constituent units as its main ingredient and (ii) a cocondensation polyester, and a layer composed of polyalkylene terephthalate comprising ethylene terephthalate constituent units as its main ingredient, wherein said cocondensation polyseter is substantially linear and is composed of (a) 2.5 to 45 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 2.5 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient , (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, and (e) 2.0 to 22.5 mol% of aliphatic dicarboxylic acid constituent units comprising succinic acid constituent units as their main ingredient, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g.
Claim 36
Dependent Claim
192 words
A polyester resin stretch laminated molding comprising a layer composed of a cocondensation polyester or a polyseter resin composition layer comprising (i) a polyalkylene terephthalate containing ethylene terephthalate constituent units as its main ingredient and (ii) a cocondensation polyester, and a layer composed of polyalkylene terephthalate comprising ethylene terephthalate constituent units as its main ingredient, wherein said cocondensation polyseter is substantially linear and is composed of (a) 2.5 to 45 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 2.5 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient , (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, and (e) 2.0 to 22.5 mol% of aliphatic dicarboxylic acid constituent units comprising succinic acid constituent units as their main ingredient, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g.
Claim 37
Dependent Claim
186 words
A preform for the preparation of a polyester resin multi-layer blow molding comprising a layer composed of a cocondensation polyester or a polyseter resin composition layer comprising (i) a polyalkylene terephthalate containing ethylene terephthalate constituent units as its main ingredient and (ii) a cocondensation polyester, and a layer composed of polyalkylene terephthalate comprising ethylene terephthalate constituent units as its main ingredient, wherein said cocondensation polyseter is substantially linear and is composed of (a) 25 to 42 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 8 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient, (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, and (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g and a glass transition temperature of 70°C or higher.
Claim 38
Dependent Claim
186 words
A preform for the preparation of a polyester resin multi-layer blow molding comprising a layer composed of a cocondensation polyester or a polyseter resin composition layer comprising (i) a polyalkylene terephthalate containing ethylene terephthalate constituent units as its main ingredient and (ii) a cocondensation polyester, and a layer composed of polyalkylene terephthalate comprising ethylene terephthalate constituent units as its main ingredient, wherein said cocondensation polyseter is substantially linear and is composed of (a) 25 to 42 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 8 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient, (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, and (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g and a glass transition temperature of 70°C or higher.
Claim 39
Dependent Claim
198 words
A preform for the preparation of a polyester resin multi-layer blow molding comprising a layer composed of a cocondensation polyester or a polyseter resin composition layer comprising (i) a polyalkylene terephthalate containing ethylene terephthalate constituent units as its main ingredient and (ii) a cocondensation polyester, and a layer composed of polyalkylene terephthalate comprising ethylene terephthalate constituent units as its main ingredient, wherein said cocondensation polyseter is substantially linear and is composed of (a) 2.5 to 45 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 2.5 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient , (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, and (e) 2.0 to 22.5 mol% of aliphatic dicarboxylic acid constituent units comprising succinic acid constituent units as their main ingredient, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g.
Claim 40
Dependent Claim
198 words
A preform for the preparation of a polyester resin multi-layer blow molding comprising a layer composed of a cocondensation polyester or a polyseter resin composition layer comprising (i) a polyalkylene terephthalate containing ethylene terephthalate constituent units as its main ingredient and (ii) a cocondensation polyester, and a layer composed of polyalkylene terephthalate comprising ethylene terephthalate constituent units as its main ingredient, wherein said cocondensation polyseter is substantially linear and is composed of (a) 2.5 to 45 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 2.5 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient , (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, and (e) 2.0 to 22.5 mol% of aliphatic dicarboxylic acid constituent units comprising succinic acid constituent units as their main ingredient, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g.
Claim 41
Dependent Claim
180 words
A polyester resin multi-layer blow molding comprising a layer composed of a cocondensation polyester or a polyseter resin composition comprising (i) a polyalkylene terephthalate containing ethylene terephthalate constituent units as its main ingredient and (ii) a cocondensation polyester, and a layer composed of a polyalkylene terephthalate comprising ethylene terephthalate constituent units as its main ingredient, wherein said cocondensation polyseter is substantially linear and is composed of (a) 25 to 42 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 8 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient, (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, and (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g and a glass transition temperature of 70°C or higher.
Claim 42
Dependent Claim
180 words
A polyester resin multi-layer blow molding comprising a layer composed of a cocondensation polyester or a polyseter resin composition comprising (i) a polyalkylene terephthalate containing ethylene terephthalate constituent units as its main ingredient and (ii) a cocondensation polyester, and a layer composed of a polyalkylene terephthalate comprising ethylene terephthalate constituent units as its main ingredient, wherein said cocondensation polyseter is substantially linear and is composed of (a) 25 to 42 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 8 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient, (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, and (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g and a glass transition temperature of 70°C or higher.
Claim 43
Dependent Claim
192 words
A polyester resin multi-layer blow molding comprising a layer composed of a cocondensation polyester or a polyseter resin composition layer comprising (i) a polyalkylene terephthalate containing ethylene terephthalate constituent units as its main ingredient and (ii) a cocondensation polyester, and a layer composed of polyalkylene terephthalate comprising ethylene terephthalate constituent units as its main ingredient, wherein said cocondensation polyseter is substantially linear and is composed of (a) 2.5 to 45 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 2.5 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient , (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, and (e) 2.0 to 22.5 mol% of aliphatic dicarboxylic acid constituent units comprising succinic acid constituent units as their main ingredient, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g.
Claim 44
Dependent Claim
192 words
A polyester resin multi-layer blow molding comprising a layer composed of a cocondensation polyester or a polyseter resin composition layer comprising (i) a polyalkylene terephthalate containing ethylene terephthalate constituent units as its main ingredient and (ii) a cocondensation polyester, and a layer composed of polyalkylene terephthalate comprising ethylene terephthalate constituent units as its main ingredient, wherein said cocondensation polyseter is substantially linear and is composed of (a) 2.5 to 45 mol% of mononuclear aromatic dicarboxylic acid constituent units comprising isophthalic acid constituent units as their main ingredient, (b) 2.5 to 25 mol% of binuclear aromatic dicarboxylic acid constituent units comprising 2,6-naphthalenedicarboxylic acid constituent units as their main ingredient , (c) 48 to 50 mol% of diol constituent units comprising ethylene glycol constituent units as their main ingredient, (d) 0 to 2 mol% of polyfunctional constituent units derived from a polyfunctional compound having 3 or more carboxyl groups and/or hydroxyl groups in total and 3 to 15 carbon atoms, and (e) 2.0 to 22.5 mol% of aliphatic dicarboxylic acid constituent units comprising succinic acid constituent units as their main ingredient, said cocondensation polyester having an intrinsic viscosity [η] of 0.5 to 1.5 dl/g.
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