EP0283837A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Compatible polyphenylene ether-linear polyester blends having improved coefficient of thermal expansion
Assignee: General Electric Co
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Filing: 1988-03-08
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Granted: —
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Expires: 2008-03-08
Abstract
Abstract Thermoplastic blends having excellent surface appearance 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.
Inventors
- 👤 John Bennie Yates, Iii
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 12:16
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/08; C08L69/00; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/126
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
138 words
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 component 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. up to about 50 parts by weight phosphate fiber per 100 parts of I.
Claim 2
Dependent Claim
138 words
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 component 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. up to about 50 parts by weight phosphate fiber per 100 parts of I.
Claim 3
Dependent Claim
18 words
A composition as in Claim 1 wherein said phosphate fiber is a calcium sodium salt of metaphosphoric acid.
Claim 4
Dependent Claim
14 words
A composition as in Claim 1 wherein said phosphate fiber has the formula CaNa(PO₃)₃.
Claim 5
Dependent Claim
30 words
A composition as in Claim 1 wherein said phosphate fiber is present in an amount of approximately 5 to 30 parts by weight per 100 parts by resinous components I.
Claim 6
Dependent Claim
14 words
A composition as in Claim 1 wherein said polyphenylene ether is a poly(2,6-dimethyl-1,4-phenylene ether).
Claim 7
Dependent Claim
32 words
A composition according to Claim 1 wherein component B is a poly(ethylene terephthalate) a poly(butylene terephthalate), or poly(1,3-cyclohexylene dimethylene terephthalate) and the polycarbonate units in component C are bisphenol A polycarbonate units.
Claim 8
Dependent Claim
27 words
A composition according to Claim 6 wherein component B is a poly(butylene terephthalate) having a number average molecular weight in the range of about 20,000 - 70,000.
Claim 9
Dependent Claim
30 words
A composition according to Claim 1 wherein the proportion of component A is about 20-40% that of component B is about 50-75% and that of component C is about 5-20%.
Claim 10
Dependent Claim
25 words
A composition according to Claim 8 wherein component C is a polycarbonate homopolymer having a weight average molecular weight in the range of about 40,000-200,000.
Claim 11
Dependent Claim
12 words
A composition according to Claim 8 wherein component C is a polyester-polycarbonate.
Claim 12
Dependent Claim
33 words
A composition according to Claim 1, further comprising 2 to 30 parts by weight of a rubbery impact modifier per 100 parts of the composition comprised of components I. and II. taken together.
Claim 13
Dependent Claim
37 words
A composition according to Claim 11 wherein said impact modifier is a triblock copolymer wherein the end blocks are derived from styrene and the midblock is derived from at least one of isoprene, butadiene, ethylene, and butylene.
Claim 14
Dependent Claim
12 words
An article of manufacture comprised of the thermoplastic composition of Claim 1.
References Cited (Backward Citations)
No citation records indexed.
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