EP0320647A2
Expired / Lapsed
EP
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Polycarbonate composition with low heat distortion
Assignee: General Electric Co
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Filing: 1988-11-21
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Granted: —
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Expires: 2008-11-21
Abstract
Abstract Polycarbonate resins are blended with a particular polyester elastomer represented by polycyclohexane dimethylcyclohexanedicarboxylate to reduce heat distortion in articles molded therefrom. Optionally, conventional impact-modifiers are also included in the blends for improvement of impact resistance properties.
Inventors
- 👤 Omar Mohamed Boutni
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 14:29
CPC Classifications
C; C08; C08L; C08L69/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
59 words
A thermoplastic molding composition, which comprises; a thermoplastic, aromatic polycarbonate; and a heat distortion modifying proportion of a polyester elastomer having a durometer hardness of from 50 to 60 Shore A; an Izod impact strength of more than 800 J/m; a glass transition temperature of 120 to 170° C. and a softening temperature of from 160 to 170° C.
Claim 2
Dependent Claim
59 words
A thermoplastic molding composition, which comprises; a thermoplastic, aromatic polycarbonate; and a heat distortion modifying proportion of a polyester elastomer having a durometer hardness of from 50 to 60 Shore A; an Izod impact strength of more than 800 J/m; a glass transition temperature of 120 to 170° C. and a softening temperature of from 160 to 170° C.
Claim 3
Dependent Claim
17 words
The composition of claim 1 wherein the polycarbonate is a homopolymer reaction product of bisphenol-A and phosgene.
Claim 4
Dependent Claim
11 words
The composition of claim 1 wherein the elastomer is polycyclohexane dimethylcyclohexanedicarboxylate.
Claim 5
Dependent Claim
33 words
The composition of claim 1 wherein the polycarbonate comprises from 65 to 99 percent by weight of the composition and the elastomer comprises from 1 to 35 percent by weight of the composition.
Claim 6
Dependent Claim
15 words
The composition of claim 1 which further comprises an impact-modifying proportion of an impact-modifying agent.
Claim 7
Dependent Claim
13 words
The composition of claim 5 wherein the agent is linear low density polyethylene.
Claim 8
Dependent Claim
15 words
The composition of claim 5 wherein the agent is an acrylate copolymer of an olefin.
Claim 9
Dependent Claim
9 words
An article molded from the composition of claim 1.
References Cited (Backward Citations)
No citation records indexed.
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