Patent US20030158515A1 successfully refreshed from Google Patents.
US4322507A
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Molded article of polyphenylene ether and hydrogenated block copolymer
Assignee: General Electric Co
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Filing: 1980-03-13
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Granted: 1982-03-30
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Expires: 2000-03-13
Abstract
Abstract Improved polyphenylene ether-containing molded articles are described. These contain high molecular weight hydrogenated block copolymers of a vinyl aromatic compound and a diene. The articles exhibit excellent mechanical properties but do not exhibit the lamination as observed in similar articles containing lower molecular weight block copolymers.
Inventors
- 👤 William R. Haaf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:56
CPC Classifications
C; C08; C08L; C08L53/00; C08L53/02; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
109 words
A three dimensional article substantially free of lamination comprised of a thermoplastic composition comprising (a) from 10 to 99 parts by weight of a polyphenylene ether resin or a polyphenylene ether resin in combination with a styrene homopolymer or random copolymer resin; and (b) from 1 to 90 parts by weight of a hydrogenated block copolymer of the A-B-A type where A is a polymerized monoalkenyl aromatic hydrocarbon block having an average molecular weight of greater than about 15,000 and B is a polymeric diene block having an average molecular weight of about 50,000-450,000, block B having had its unsaturation reduced to less than 10% of the original unsaturation.
Claim 2
Dependent Claim
109 words
A three dimensional article substantially free of lamination comprised of a thermoplastic composition comprising (a) from 10 to 99 parts by weight of a polyphenylene ether resin or a polyphenylene ether resin in combination with a styrene homopolymer or random copolymer resin; and (b) from 1 to 90 parts by weight of a hydrogenated block copolymer of the A-B-A type where A is a polymerized monoalkenyl aromatic hydrocarbon block having an average molecular weight of greater than about 15,000 and B is a polymeric diene block having an average molecular weight of about 50,000-450,000, block B having had its unsaturation reduced to less than 10% of the original unsaturation.
Claim 3
Dependent Claim
44 words
An article as defined in claim 1 wherein, in component (b) prior to hydrogenation: (i) the blocks A constitute from 2-35 weight percent of the copolymer; and (ii) 35-55 percent of the conjugated diene carbon atoms in block B are in vinyl side chains.
Claim 4
Dependent Claim
23 words
An article as defined in claim 1 wherein each block A has an average molecular weight in the range of 20,000 to 40,000.
Claim 5
Dependent Claim
93 words
An article as defined in claim 1 wherein component (a) is a polyphenylene ether of the formula ##STR3## wherein the oxygen ether atom of one unit is connected to the benzene nucleus of the next adjoining unit: n is an integer of at least 50; and each Q is a monovalent substituent selected from hydrogen, halogen, hydrocarbon radicals, halohydrocarbon radicals having at least two carbon atoms between the halogen atom and the phenyl nucleus, hydrocarbonoxy radicals, and halohydrocarbonoxy radicals having at least two carbon atoms between the halogen atom and the phenyl nucleus.
Claim 6
Dependent Claim
19 words
An article as defined in claim 4 wherein each Q is alkyl having from 1 to 4 carbon atoms.
Claim 7
Dependent Claim
12 words
An article as defined in claim 5 wherein each Q is methyl.
Claim 8
Dependent Claim
17 words
An article as defined in claim 1 wherein in component (b) the monoalkenyl aromatic hydrocarbon is styrene.
Claim 9
Dependent Claim
12 words
An article as defined in claim 1 wherein said diene is butadiene.
Claim 10
Dependent Claim
117 words
An article as defined in claim 1 wherein component (a) comprises: (i) from 1 to 99% by weight of a polyphenylene ether of the formula ##STR4## wherein Q is alkyl of from 1 to 4 carbon atoms and n is an integer of at least 50 and (ii) from 99 to 1% by weight of a styrene homopolymer or random copolymer resin having at least 25% of the polymer units derived from a vinyl aromatic compound of the formula ##STR5## wherein R is hydrogen, alkyl of from 1 to 4 carbon atoms or halogen, Z is hydrogen, alkyl of from 1 to 4 carbon atoms or vinyl and p is an integer of from 1 to 5.
Claim 11
Dependent Claim
50 words
An article as defined in claim 9 wherein the styrene resin is a styrene homopolymer resin or a rubber-modified styrene resin, said rubber comprising a diene rubber or a rubbery copolymer of butadiene and styrene in an amount of from about 4 to about 12% by weight of said resin.
Claim 12
Dependent Claim
13 words
An article as defined in claim 9 wherein the polyphenylene ether is poly(2,6-dimethyl-1,4-phenylene)ether.
References Cited (Backward Citations)
US4167507A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-03-29 | 1985-09-28 | 1986-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-29 | 1989-09-28 | 1990-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-29 | 1993-09-28 | 1994-03-30 | $7700.00 | Window Closed / Lapsed |