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US 4,786,664 AGranted
Compatible polyphenylene ether-linear polyester blends having improved coefficient of thermal expansion
AssigneeGeneral Electric Company
InventorJohn B. Yates, III
Life of this patent
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Abstract
Thermoplastic blends having excellent surface apperance and improved coefficient of thermal expansion are prepared from a polyphenylene ether, a linear polyester such as a poly(alkylene dicarboxylate), a polymer containing a substantial proportion of aromatic polycarbonate units, and property improving amounts of phosphate fibers comprised of calcium sodium metaphosphate.
Claims12
A thermoplastic composition comprising:
- I. 100 parts by weight of the following resinous components and any reaction products thereof, all percentage proportions being by weight of total resinous components:
- (A) about 15 to 50% of at least one polyphenylene ether, or a blend thereof with at least one polystyrene;
- (B) about 20 to 80% of at least one poly(alkylene dicarboxylate), the weight ratio of component A to B being at most 1.2:1;
- and
- (C) from 3% to about 50% of at least one polymer containing a substantial proportion of aromatic polycarbonate units and having a weight average molecular weight of at least about 40,000 as determined by gel permeation chromatography relative to polystyrene, or a blend thereof with a styrene homopolymer;
- and
- II. about 2 to 50 parts by weight phosphate fiber comprised of a calcium sodium salt of metaphosphoric acid per 100 parts of I.
4 more elements
Dependencies are inferred from the claim text.