US4797453A
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Graft polymers of polyphenylene ethers
Assignee: BASF SE
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Filing: 1987-06-19
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Granted: 1989-01-10
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Expires: 2007-06-19
Abstract
Abstract Graft polymers of (A) a polyphenylene ether as a base polymer and (B) a half ester of an unsaturated dicarboxylic acid of the general formula ##STR1## as a graft monomer, where R 1 is C 1 -C 25 -alkyl, C 2 -C 25 -alkylene or aryl, R 2 and R 3 are each H, Br, Cl or one of the radicals R 1 , and Q is H or an alkali metal, an alkaline earth metal or an ammonium cation, with or without (C) further olefinically unsaturated monomers, and their preparation.
Inventors
- 👤 Christof Taubitz
- 👤 Hermann Gausepohl
- 👤 Erhard Seiler
- 👤 Lothar Schlemmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:16
CPC Classifications
C; C08; C08F; C08F261/00; C08F261/06; C09; C09D; C09D151/00; C09D151/08; C08F283/00; C08F283/06; C08F283/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
82 words
A graft polymer of (A) a polyphenylene ether as a base polymer and (B) a half ester of an unsaturated dicarboxylic acid of the formula ##STR3## as a graft monomer, where R 1 is C 1 -C 25 -alkyl, C 2 -C 25 -alkylene or aryl, R 2 and R 3 are each hydrogen, bromine, chlorine or one of the radicals R 1 , and Q is hydrogen, an alkali metal, one equivalent of an alkaline earth metal or an ammonium cation.
Claim 2
Dependent Claim
82 words
A graft polymer of (A) a polyphenylene ether as a base polymer and (B) a half ester of an unsaturated dicarboxylic acid of the formula ##STR3## as a graft monomer, where R 1 is C 1 -C 25 -alkyl, C 2 -C 25 -alkylene or aryl, R 2 and R 3 are each hydrogen, bromine, chlorine or one of the radicals R 1 , and Q is hydrogen, an alkali metal, one equivalent of an alkaline earth metal or an ammonium cation.
Claim 3
Dependent Claim
22 words
A graft polymr as defined in claim 1, wherein the formula is ##STR4## where R 1a is C 1 -C 25 -alkyl.
Claim 4
Dependent Claim
28 words
A graft polymer as defined in claim 1, of from 80 to 99.9% by weight of component A and from 0.1 to 20% by weight of component B.
Claim 5
Dependent Claim
28 words
A graft polymer as defined in claim 3, of from 95 to 99.7% by weight of component A and from 0.3 to 5% by weight of component B.
References Cited (Backward Citations)
US3862263A
Cited
US3928497A
Cited
US4132684A
Cited
US4148843A
Cited
US4283511A
Cited
US4456736A
Cited
US4654405A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-10 | 1992-07-11 | 1993-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-10 | 1996-07-11 | 1997-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-10 | 2000-07-11 | 2001-01-10 | $7700.00 | Window Closed / Lapsed |