EP0107048A1
Expired / Lapsed
EP
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Acrylic modified compositions of polycarbonate and polyethylene terephthalate
Assignee: General Electric Co
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Filing: 1983-09-22
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Granted: —
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Expires: 2003-09-22
Abstract
Abstract Thermoplastic blends of aromatic polycarbonate resin, in major amount, poly(ethylene terephthalate), and acrylate-based core-acrylate shell polymer, optionally including a flame retardant agent, are described. The blends are extrudable and moldable into shaped forms which possess good notched impact strength and good weatherability.
Inventors
- 👤 Richard Brian Allen
- 👤 Harold Frazee Giles, Jr.
- 👤 Jean Marie Hubert Heuschen
- 👤 Robert Alan Wiercinski
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 03:41
CPC Classifications
C; C08; C08L; C08L69/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
73 words
A thermoplastic composition comprising an admixture of (a) an aromatic polycarbonate resin, said polymer being present in an amount not substantially less than 51 percent by weight of the total weight of components (a), (b) and (c); (b) a poly(ethylene terephthalate) resin which is the only polyester in the composition; and (c) an acrylate based core-polymerized acrylate shell polymer in an amount effective to improve the notched impact strength of (a) and (b).
Claim 2
Dependent Claim
73 words
A thermoplastic composition comprising an admixture of (a) an aromatic polycarbonate resin, said polymer being present in an amount not substantially less than 51 percent by weight of the total weight of components (a), (b) and (c); (b) a poly(ethylene terephthalate) resin which is the only polyester in the composition; and (c) an acrylate based core-polymerized acrylate shell polymer in an amount effective to improve the notched impact strength of (a) and (b).
Claim 3
Dependent Claim
43 words
A composition according to Claim 1, in which the polycarbonate is a high molecular weight aromatic polymer having the formula: wherein R 1 and R 2 are hydrogen, (lower) alkyl or phenyl and n is at least 30, and preferably 40 to 400.
Claim 4
Dependent Claim
29 words
A composition according to Claim 1, in which the polycarbonate has an intrinsic viscosity of 0.30 to 1.0 deciliters per gram, measured in solution in mechylene chloride at 25°C.
Claim 5
Dependent Claim
16 words
A composition according to Claim 1, in which the polycarbonate is derived from bisphenol-A and phosgene.
Claim 6
Dependent Claim
29 words
A composition according to Claim 1, in which the poly(ethylene terephthalate) has an intrinsic viscosity of 0.2 to 1.5 deciliters per gram, measured in solution in phenol-tetrachloroethane at 25-30°C.
Claim 7
Dependent Claim
146 words
A composition according to Claim 1, in which component (c) is a multi-phase interpolymer comprising (A) about 25 to 95 weight percent of a first elastomeric phase polymerized from a monomer system of about 75 to 99.8 weight percent of a C 1 -C 6 acrylate, 0.1 to 5 weight percent of a polyethylenically unsaturated crosslinking monomer havinq a plurality of addition polymerizable reactive groups all of which polymerize at substantially the same rate of reaction, and 0.1 to 5 weight percent of a graftlinking monomer being polyethylenically unsaturated and having a plurality of addition polymerizable groups at least one of which polymerizes at a substantially different rate from at least one of the other reactive groups, and (B) about 75 to 5 weight percent of a final, rigid thermoplastic phase polymerized from a monomer system consisting of a C 1 to C 4 alkyl methacrylate.
Claim 8
Dependent Claim
17 words
A composition according to Claim 6, in which the graftlinking monomer is allyl methacrylate or diallyl maleate.
Claim 9
Dependent Claim
14 words
A composition according to Claim 6, in which the crosslinking monomer is butylene diacrylate.
Claim 10
Dependent Claim
16 words
A composition according to Claim 6, in which said final phase consists of polymerized methyl methacrylate.
Claim 11
Dependent Claim
42 words
A composition according to Claim 1, which comprises from about 51 to about 97 percent by weight of (a), from about 3 to about 49 percent by weight of (b) and from about 3 to about 20 percent by weight of (c).
Claim 12
Dependent Claim
18 words
A composition according to Claim 1,.which also contains (d) a flame retardant amount of a flame retardant agent.
Claim 13
Dependent Claim
17 words
A composition according to Claim 11, in which the flame retardant agent is a halogenated aromatic polycarbonate.
Claim 14
Dependent Claim
20 words
A composition according to Claim 12, in which the flame retardant agent is a copolymer of tetra- bromobisnhenol-A and bisphenol-A.
Claim 15
Dependent Claim
17 words
A composition according to Claim 1, which further includes a melt stabilizing amount of an organic phosphite.
References Cited (Backward Citations)
EP0025920A1
Cited
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