Patent US4217052A successfully refreshed from Google Patents.
Patent US4670498A successfully refreshed from Google Patents.
US4670498A
Expired / Lapsed
US
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Polyester block copolymer composition
Assignee: Toyobo Co Ltd
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Filing: 1985-11-05
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Granted: 1987-06-02
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Expires: 2005-11-05
Abstract
Abstract A polyester block copolymer composition comprising 100 parts by weight of a polyester block copolymer and 0.05 to 10 parts by weight of a metal alcoholate of the formula: M(OR) n , wherein M is a metal of the groups I to III in periodic table, R is a hydrocarbon group having 1 to 20 carbon atoms, and n is 1 to 3, said polyester block copolymer composition having improved melt properties and being suitable for producing various shaped articles by extrusion molding.
Inventors
- 👤 Hironobu Furusawa
- 👤 Tadao Taika
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:54
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/672; C08G63/02; C08G63/60; C08K; C08K5/00; C08K5/04; C08K5/05; C08K5/057
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
175 words
A polyester block copolymer composition which comprises 100 parts by weight of a polyester block copolymer comprising (A) a crystalline segment having a high melting point and (B) a polymer segment having a low melting point, wherein the polymer produced from said crystalline segment having a high melting point alone has a melting point of not lower than 150° C. and the polymer segment having a low melting point alone has a melting point of not higher than 130° C., said crystalline segment having a high melting point being a member selected from the group consisting of polytetramethylene terephthalate, polytrimethylene terephthalate and polytetramethylene-2,6-naphthalate and said polymer segment having a low melting point being a member selected from the group consisting of polytetramethylene glycol, polytetramethylene adipate and poly-ε-caprolactone; and 0.05 to 10 parts by weight of a metal alcoholate of the formula: M(OR) n wherein M is a metal of the groups I to III in the periodic table, R is a hydrocarbon group having 1 to 20 carbon atoms, and n is 1 to 3.
Claim 2
Dependent Claim
175 words
A polyester block copolymer composition which comprises 100 parts by weight of a polyester block copolymer comprising (A) a crystalline segment having a high melting point and (B) a polymer segment having a low melting point, wherein the polymer produced from said crystalline segment having a high melting point alone has a melting point of not lower than 150° C. and the polymer segment having a low melting point alone has a melting point of not higher than 130° C., said crystalline segment having a high melting point being a member selected from the group consisting of polytetramethylene terephthalate, polytrimethylene terephthalate and polytetramethylene-2,6-naphthalate and said polymer segment having a low melting point being a member selected from the group consisting of polytetramethylene glycol, polytetramethylene adipate and poly-ε-caprolactone; and 0.05 to 10 parts by weight of a metal alcoholate of the formula: M(OR) n wherein M is a metal of the groups I to III in the periodic table, R is a hydrocarbon group having 1 to 20 carbon atoms, and n is 1 to 3.
Claim 3
Dependent Claim
52 words
The composition according to claim 1, wherein the metal alcoholate is a salt of a monovalent alcohol selected from the group consisting of methyl alcohol, ethyl alcohol, propyl alcohol, isopropyl alcohol, butyl alcohol, sec-butyl alcohol, and tert-butyl alcohol with a metal selected from the group consisting of sodium, potassium, calcium and aluminum.
Claim 4
Dependent Claim
32 words
The composition according to claim 2, wherein the metal alcoholate is a member selected from the group consisting of sodium ethoxide, potassium butoxide, calcium ethoxide, aluminum triisopropoxide, aluminum tri-sec-butoxide, and aluminum tri-tert-butoxide.
Claim 5
Dependent Claim
14 words
The composition according to claim 2, wherein the metal alcoholate is an aluminum alcoholate.
Claim 6
Dependent Claim
19 words
The composition according to claim 4, wherein the aluminum alcoholate is a member selected from aluminum tri-sec-butoxide and aluminum-tri-tert-butoxide.
References Cited (Backward Citations)
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US3546320A
Cited
US3907926A
Cited
JPS5796057A
Cited
US4336343A
Cited
JPS58194937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-01 | 1990-12-01 | 1991-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-01 | 1994-12-01 | 1995-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-01 | 1998-12-01 | 1999-06-02 | $7700.00 | Window Closed / Lapsed |