Patent US4381772A successfully refreshed from Google Patents.
Patent EP0079477A1 successfully refreshed from Google Patents.
EP0079477A1
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Modified polyester compositions
Assignee: General Electric Co
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Filing: 1982-10-20
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Granted: —
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Expires: 2002-10-20
Abstract
Abstract Modified thermoplastic polyester compositions are provided which comprise (a) a poly(1,4-butylene terephthalate), a block poly(1,4-butytene terephthalate) ester copolymer or blend of either with a poly(ethylene terephthalate) and (b) (i) a modifier thereof comprising a combination of an acrylic or methacrytic grafted core shell polymer of a conjugated diene, alone or in combination with a vinyl aromatic and (ii) an aromatic polycarbonate. The compositions can include (c) reinforcing glass fibers and/or a flame retardant. The core shell polymer component in modifier (b) provides enhanced resistance to low temperature impact fracture.
Inventors
- 👤 Surendra Hukanchand Agarwal
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 03:19
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
137 words
A thermoplastic composition comprising : (a) from 30 to 80 parts by weight of a polyester composition comprising : (i) a poly(1,4-butylene terephthalate) resin; (ii) a block copolyester of poly(1,4-butylene terephthalate) and an aromatic/aliphatic or aliphatic polyester; (iii) a blend of (i) and a poly(ethylene terephthalate) resin; or (iv) a blend of (ii) and a poly(ethylene terephthalate) resin; and (b) the balance to make 100 parts of (a) and (b) together of an impact modifier thereof comprising a combination of : (i) from 10 to 30 parts by weight of an acrylic or methacrylic monomer grafted core shell 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 (ii) from 10 to 40 parts by weight of an aromatic polycarbonate resin.
Claim 2
Dependent Claim
137 words
A thermoplastic composition comprising : (a) from 30 to 80 parts by weight of a polyester composition comprising : (i) a poly(1,4-butylene terephthalate) resin; (ii) a block copolyester of poly(1,4-butylene terephthalate) and an aromatic/aliphatic or aliphatic polyester; (iii) a blend of (i) and a poly(ethylene terephthalate) resin; or (iv) a blend of (ii) and a poly(ethylene terephthalate) resin; and (b) the balance to make 100 parts of (a) and (b) together of an impact modifier thereof comprising a combination of : (i) from 10 to 30 parts by weight of an acrylic or methacrylic monomer grafted core shell 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 (ii) from 10 to 40 parts by weight of an aromatic polycarbonate resin.
Claim 3
Dependent Claim
55 words
A composition as defined in Claim 1 wherein the polyester composition (a) comprises from 40 to 75 parts by weight, impact modifier (b) (i) comprises from 10 to 20 parts by weight, and (b) (ii) comprises 10 to 40 parts by weight per 100 parts by weight of (a), (b) (i) and (b) (ii) together.
Claim 4
Dependent Claim
46 words
. A composition as defined in claim 1 wherein the impact modifier (b) (i) and (b) (ii) each are present in an amount of from about 12 to about 18 parts by weight per 100 parts by weight of (a), (b) (i) and (b) (ii) together.
Claim 5
Dependent Claim
38 words
A composition as defined in claim 1 wherein said poly(1,4-butyleneterephthalate) in component (a) has an intrinsic viscosity of at least about 0.9 deciliters/gram when measured in a solution in a 60:40 mixture of phenol and tetrachloroethane at 30°C.
Claim 6
Dependent Claim
41 words
A composition as defined in claim 4 wherein said poly(ethylene terephthalate) in component (a) has an intrinsic viscosity of at least about 0.5 deciliters per gram when measured in a solution in a 60:40 mixture of phenol and tetrachloroethane at 30°C.
Claim 7
Dependent Claim
20 words
A composition as defined in claim 1 wherein, in component (a) (i), said poly(1,4-butylene terephthalate) resin is linear or branched.
Claim 8
Dependent Claim
35 words
A composition as defined in claim 6 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 9
Dependent Claim
41 words
A composition as defined in claim 1 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 10
Dependent Claim
25 words
A composition as defined in claim 8 wherein said core shell polymer comprises units of butadiene, styrene and a C 1 -C 6 alkyl methacrylate.
Claim 11
Dependent Claim
21 words
A composition as defined in claim 9 wherein in said core shell polymer the C 1 -C 6 methacrylate is methyl.
Claim 12
Dependent Claim
17 words
A composition as defined in claim 1 wherein said aromatic polycarbonate resin includes units derived from bisphenol-A.
Claim 13
Dependent Claim
39 words
A composition as defined in claim 1 which also includes (c) fibrous glass reinforcing agent in an amount of from about 1 to about 60 parts by weight per 100 parts by weight of (a), (b) and (c) together.
Claim 14
Dependent Claim
19 words
A composition as defined in claim 1 which also includes (d) a flame-retardant amount of a flame retarding agent.
Claim 15
Dependent Claim
48 words
A composition as defined in claim 1 which also includes (fibrous glass reinforcing agent in an amount of from about 1 to about 60 parts by weight per 100 parts by weight of (a), (b) and (c) together and (d) a flame-retardant amount of a flame retarding agent.
Claim 16
Dependent Claim
85 words
A composition as defined in claim 1 which also includes (e) a hindered phenolic antioxidant in an amount of from 0.25 to 1.5 parts by weight, (f) an aromatic amine in an amount of from 0.25 to 1.5 parts by weight, (g) a thioester stabilizer in an amount of from O.5 to 5.0 parts by weight and, optionally, (h) a trivalent phosphorus stabilizer in an amount of from 0.25 to 1.5 parts by weight per 100 parts by weight of (a), (b) and (c), together.
References Cited (Backward Citations)
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