EP0358993A2
Expired / Lapsed
EP
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Polyphenylene ether/polypropylene compositions
Assignee: General Electric Co
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Filing: 1989-08-23
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Granted: —
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Expires: 2009-08-23
Abstract
Abstract Polyphenylene ether resin/polypropylene resin compositions are disclosed which have improved heat deflection temperature and stiffness. The improvements result from the use of a polyphenylene ether resin having an intrinsic viscosity of below about 0.30 dl./gm. The compositions may further comprise an impact modifier.
Inventors
- 👤 Gim Fun Lee, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 13:10
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123; Y; Y10; Y10S; Y10S525/00; Y10S525/905
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
27 words
A thermoplastic composition comprising: (a) polyphenylene ether resin; and (b) polypropylene resin; wherein the polyphenylene ether resin has an intrinsic viscosity of less than about 0.30 dl./gm.
Claim 2
Dependent Claim
27 words
A thermoplastic composition comprising: (a) polyphenylene ether resin; and (b) polypropylene resin; wherein the polyphenylene ether resin has an intrinsic viscosity of less than about 0.30 dl./gm.
Claim 3
Dependent Claim
21 words
The composition according to Claim 1, wherein the polyphenylene ether resin has an intrinsic viscosity of less than about 0.20 dl./gm.
Claim 4
Dependent Claim
21 words
The composition according to Claim 1, wherein the polyphenylene ether resin has an intrinsic viscosity of less than about 0.10 dl./gm.
Claim 5
Dependent Claim
59 words
The composition according to Claim 1, wherein the polyphenylene ether is a homo- or copolymer having units of the formula: wherein Q, Q′, Q˝ and Q‴ are independently selected from the group consisting of hydrogen, halogen, hydrocabon, halohydrocarbon, hydrocarbonoxy, and halohydrocarbonoxy; and n represents the total number of monomer units and is an integer of less than about 95.
Claim 6
Dependent Claim
13 words
The composition according to Claim 4, wherein n is less than about 75.
Claim 7
Dependent Claim
13 words
The composition according to Claim 4, wherein n is less than about 50.
Claim 8
Dependent Claim
20 words
The composition according to Claim 4, wherein the polyphenylene ether has a number average molecular weight of less than 12,000.
Claim 9
Dependent Claim
49 words
The composition according to Claim 1, wherein the polyphenylene ether is a homo- or copolymer produced from one or more polyphenylene ethers comprised of: poly(2,6-dipropyl-1,4-phenylene ether); poly(2,6-diphenyl-1,4-phenylene ether); poly(2-methyl-6-tolyl-1-4-phenylene ether); poly(2-methyl-6-butyl-1-4-phenylene ether); poly(2-6-dimethoxy-1-4-phenylene ether); poly(2,3,6-trimethyl-1,4-phenylene ether); poly(2,3,5,6-tetramethyl-1,4-phenylene ether); poly(2,6-diethyoxy-1,4-phenylene ether); poly(2,6-dimethyl-1,4-phenylene ether); poly(2,6-diethyl-1,4-phenylene ether); poly(2,6-dibutyl-1,4-phenylene ether); and poly(2,6-diauryl-1,4-phenylene ether).
Claim 10
Dependent Claim
17 words
The composition according to Claim 8, wherein the copolymer is selected from poly(2,6-dimethyl-co-2,3,6-trimethyl-1 and poly(2,6-dimethyl-co-2-methyl-6-butyl-1, 4-phenylene ether).
Claim 11
Dependent Claim
12 words
The composition according to Claim 1, wherein the polypropylene resin is crystalline.
Claim 12
Dependent Claim
13 words
The composition according to Claim 10, wherein the polypropylene is isotactic or syndiotactic.
Claim 13
Dependent Claim
30 words
The composition according to Claim 1, wherein component (b) is present in an amount of at least 50% by weight, based upon 100% by weight of (a) and (b) combined.
Claim 14
Dependent Claim
30 words
The composition according to Claim 1, wherein component (b) is present in an amount of at least 70% by weight, based upon 100% by weight of (a) and (b) combined.
Claim 15
Dependent Claim
30 words
The composition according to Claim 1, wherein component (b) is present in an amount of at least 90% by weight, based upon 100% by weight of (a) and (b) combined.
Claim 16
Dependent Claim
39 words
The composition according to Claim 1, further comprising, as component (c), an impact modifier selected from the group consisting of block copolymers of the A-B type, block copolymers of A-B-A type, radial teleblock copolymers or mixtures of the foregoing.
Claim 17
Dependent Claim
22 words
The composition according to Claim 15, wherein the impact modifier component (c) is one or more block copolymers of the A-B-A type.
Claim 18
Dependent Claim
31 words
The composition according to Claim 16, wherein component (c) is present in an amount of less than about 20% by weight, based on 100% by weight of (a) and (b) combined.
Claim 19
Dependent Claim
31 words
The composition according to Claim 16, wherein component (c) is present in an amount of less than about 10% by weight, based on 100% by weight of (a) and (b) combined.
Claim 20
Dependent Claim
31 words
The composition according to Claim 16, wherein component (c) is present in an amount of less than about 5% by weight, based on 100% by weight of (a) and (b) combined.
Claim 21
Dependent Claim
50 words
The composition according to Claim 16, wherein component (c) is a copolymer of the A-B-A type in which the center block B is an ethylene-butylene block, has a molecular weight of between 20,000 and 200,000 and has a greater molecular weight than the combined molecular weight of terminal blocks A.
Claim 22
Independent Claim
37 words
A method of improving the heat deflection temperature and stiffness of a composition comprised of polyphenylene ether resin and polypropylene resin, said method comprised of utilizing polyphenylene ether resin having an intrinsic viscosity of below about 0.30.
Claim 23
Independent Claim
37 words
A method of improving the heat deflection temperature and stiffness of a composition comprised of polyphenylene ether resin and polypropylene resin, said method comprised of utilizing polyphenylene ether resin having an intrinsic viscosity of below about 0.30.
Claim 24
Dependent Claim
9 words
An article formed from the composition of Claim 1.
Claim 25
Dependent Claim
9 words
An article produced by the method of Claim 20.
References Cited (Backward Citations)
No citation records indexed.
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