EP0114288A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Additive concentrate for polyester compositions and method of addition
Assignee: General Electric Co
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Filing: 1983-12-10
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Granted: —
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Expires: 2003-12-10
Abstract
Abstract Thermoplastic compositions of a polyester and/or polycarbonate resin, an acrylic core-shell impact modifier and a stabilizer package are provided by an improved method in which the imput modifier and stabilizer components are first preblended and the preblend is then admixed with the polyester and/or polycarbonate. The resultant blend composition retains good properties even without the use of high amounts of the stabilizers.
Inventors
- 👤 Surendra Hukamchand Agarwal
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 01:53
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/226; C08K; C08K5/00; C08K5/0008; C08K5/005; C08L; C08L51/00; C08L51/04; C08L67/00; C08L67/02; C08L69/00; C08J2451/00
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
168 words
An improvement in the method of preparing a thermoplastic composition comprising admixing (a) a thermoplastic polymer selected from the group consisting of (1) a polyester resin which is (i) a poly(1,4-butylene terephthalate) resin, or (ii) a block copolyester of poly(l,4-butylene terephthalate) and an aromatic/aliphatic or aliphatic polyester, or (iii) a blend of (i) and a poly(ethylene terephthalate) resin, or (iv) a blend of (ii) and a poly(ethylene terephthalate) resin; (2) an aromatic polycarbonate resin; and (3) mixtures of (1) and (2); (b) the balance to make 100 parts of (a) and (b) together of an acrylic or methacrylic polymer of a conjugated diene, alone or in combination with a vinyl monomer, the core being polymerized from over 50 weight percent of said diene; and (c) a stabilizer composition comprising (i) a hindered phenolic antioxidant, (ii) optionally, an aromatic amine, (iii) a thioester, and, optionally, (iv) a trivalent phosphorus compound, said improvement comprising forming a pre-blend .of components (b) and (c) and intimately admixing the pre-blend with component (a).
Claim 2
Dependent Claim
168 words
An improvement in the method of preparing a thermoplastic composition comprising admixing (a) a thermoplastic polymer selected from the group consisting of (1) a polyester resin which is (i) a poly(1,4-butylene terephthalate) resin, or (ii) a block copolyester of poly(l,4-butylene terephthalate) and an aromatic/aliphatic or aliphatic polyester, or (iii) a blend of (i) and a poly(ethylene terephthalate) resin, or (iv) a blend of (ii) and a poly(ethylene terephthalate) resin; (2) an aromatic polycarbonate resin; and (3) mixtures of (1) and (2); (b) the balance to make 100 parts of (a) and (b) together of an acrylic or methacrylic polymer of a conjugated diene, alone or in combination with a vinyl monomer, the core being polymerized from over 50 weight percent of said diene; and (c) a stabilizer composition comprising (i) a hindered phenolic antioxidant, (ii) optionally, an aromatic amine, (iii) a thioester, and, optionally, (iv) a trivalent phosphorus compound, said improvement comprising forming a pre-blend .of components (b) and (c) and intimately admixing the pre-blend with component (a).
Claim 3
Dependent Claim
26 words
A method according to Claim 1, in which the pre-blend of (b) and (c) is prepared by admixing the two under relatively mild conditions of temperature.
Claim 4
Dependent Claim
15 words
A method according to Claim 2, in which the temperature is between 93 and 232°C.
Claim 5
Dependent Claim
18 words
A method according to Claim 1, in which the pre-blend of (b) and (c) is co-extruded with (a).
Claim 6
Dependent Claim
10 words
A thermoplastic composition made by the method of Claim 1.
Claim 7
Dependent Claim
36 words
A composition as defined in Claim 5, wherein the polyester composition (a) comprises from about 30 to about 90 parts by weight, and impact modifier (b) comprises from about 5 to about 30 parts by weight.
Claim 8
Dependent Claim
47 words
A composition as defined in Claim 5, in which stabilizer component (c) is present in amounts of from 0.25 to 1.5 parts by weight of each of (i), (ii) and (iii) and from 0.5 to 5 parts of (iv) per 100 parts of (a) and (b) combined.
Claim 9
Dependent Claim
40 words
A composition as defined in Claim 5, wherein said poly(1,4-butylene terephthalate) in component (a) has an intrinsic viscosity of at least about 0.9 deciliters per gram when measured in solution in a 60:40 mixture of phenol and tetrachloroethane at 30°C.
Claim 10
Dependent Claim
40 words
A composition as defined in Claim 8, wherein said poly(ethylene terephthalate) in component (a) has an intrinsic viscosity of at least about 0.5 deciliters per gram when measured in solution in a 60:40 mixture of phenol and tetrachloroethane at 30°C.
Claim 11
Dependent Claim
20 words
A composition as defined in Claim 5, wherein in said component (a)(1)(i) said poly(l,4-butylene terephthalate) resin is linear or branched.
Claim 12
Dependent Claim
35 words
A composition as defined in Claim 10, wherein said branched polyester is a high melt viscosity (1,4-butylene terephthalate) resin which includes a small amount of a branching component containing at least three ester forming groups.
Claim 13
Dependent Claim
40 words
A composition as defined in Claim 5, wherein in graft core shell polymer component (b)(i), the conjugated diene polymer comprises butadiene or isoprene, alone or in combination with a vinyl aromatic compound, and the grafted monomer is a methacrylic monomer.
Claim 14
Dependent Claim
25 words
A composition as defined in Claim 8, wherein said core shell polymer comprises units of butadiene, styrene and a C l -C 6 alkyl methacrylate.
Claim 15
Dependent Claim
22 words
A composition as defined in Claim 9, wherein in said core shell polymer the C 1 -C 6 methacrylate is methyl methacrylate.
Claim 16
Dependent Claim
17 words
A composition as defined in Claim 1, wherein said aromatic polycarbonate resin includes units derived from bisphenol-A.
Claim 17
Dependent Claim
40 words
A composition as defined in Claim 1, which also includes (d) a filler and/or reinforcing agent in an amount of from about 1 to about 60 parts by weight per 100 parts by weight of (a), (b) and (d) together.
Claim 18
Dependent Claim
16 words
A composition as defined in Claim 16, in which (d) is glass, mica, talc or clay.
Claim 19
Dependent Claim
107 words
An improvement in the method of preparing a thermoplastic composition comprising admixing : (a) an aromatic polycarbonate resin; and (b) the balance to make 100 parts of (a) and (b) together of an acrylic or methacrylic polymer of a conjugated diene, alone or in combination with a vinyl monomer, the core being polymerized from over 50 weight percent of said diene; and (c) a stabilizer composition comprising (i) a hindered phenolic antioxidant, (ii) optionally, an aromatic amine, (iii) a thioester, and optionally, (iv) a trivalent phosphorus compound, said improvement comprising forming a preblend of components (b) and (c) and intimately admixing the preblend with component (a) .
Claim 20
Dependent Claim
107 words
An improvement in the method of preparing a thermoplastic composition comprising admixing : (a) an aromatic polycarbonate resin; and (b) the balance to make 100 parts of (a) and (b) together of an acrylic or methacrylic polymer of a conjugated diene, alone or in combination with a vinyl monomer, the core being polymerized from over 50 weight percent of said diene; and (c) a stabilizer composition comprising (i) a hindered phenolic antioxidant, (ii) optionally, an aromatic amine, (iii) a thioester, and optionally, (iv) a trivalent phosphorus compound, said improvement comprising forming a preblend of components (b) and (c) and intimately admixing the preblend with component (a) .
Claim 21
Dependent Claim
9 words
A thermoplastic composition made by the process of_Claim 18.
Claim 22
Dependent Claim
34 words
A method as defined in Claim 1 wherein the preblend of (b) and (c) is prepared by admixing the two in the presence of a small amount of a homopolymer or copolymer of ethylene.
References Cited (Backward Citations)
No citation records indexed.
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