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Patent US5015703A successfully refreshed from Google Patents.
US5015703A
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Reactively capped polyarylene sulfide and method and intermediates for their preparation
Assignee: General Electric Co
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Filing: 1990-11-19
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Granted: 1991-05-14
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Expires: 2010-11-19
Abstract
Abstract Polyarylene sulfides react with disulfides containing reactive functional groups, typically at temperatures within the range of about 225°-375° C., yielding reactively capped polyarylene sulfides. The preferred reactive functional groups are amino groups and carboxy groups and functional derivatives thereof.
Inventors
- 👤 Tohru Takekoshi
- 👤 Andrew J. Caruso
- 👤 Jane M. Terry
- 👤 Edwin J. Iwanowicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:28
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/44; C07D209/48; C07D405/00; C07D405/14; C08; C08G; C08G75/00; C08G75/02; C08G75/0204; C08G75/0209; C08G75/0213; C08G75/0222; C08G75/0286; C08G75/029
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
146 words
A method for preparing a cured polyarylene sulfide which comprises (1) effecting reaction in the melt, in the absence of solvents, between a polyarylene sulfide and a disulfide of the formula A.sup.1 --S--S--A.sup.2, (I) wherein: each of A 1 and A 2 is independently ##STR6## Y is X or --R 1 X n and Z is hydrogen, X or --R 1 X n , or Y and Z together are ##STR7## R 1 and R 2 are organic radicals; X is a functional group capable of reaction with a functional group in another polymer molecule to form a block copolymer; and n is 1 or 2, to form a reactively capped polyphenylene sulfide; and (2) heating said reactively capped polyarylene sulfide with an oxygen-containing gas at a temperature above about 200° C. for a period of time to result in a substantial decrease in melt flow.
Claim 2
Independent Claim
146 words
A method for preparing a cured polyarylene sulfide which comprises (1) effecting reaction in the melt, in the absence of solvents, between a polyarylene sulfide and a disulfide of the formula A.sup.1 --S--S--A.sup.2, (I) wherein: each of A 1 and A 2 is independently ##STR6## Y is X or --R 1 X n and Z is hydrogen, X or --R 1 X n , or Y and Z together are ##STR7## R 1 and R 2 are organic radicals; X is a functional group capable of reaction with a functional group in another polymer molecule to form a block copolymer; and n is 1 or 2, to form a reactively capped polyphenylene sulfide; and (2) heating said reactively capped polyarylene sulfide with an oxygen-containing gas at a temperature above about 200° C. for a period of time to result in a substantial decrease in melt flow.
Claim 3
Dependent Claim
13 words
A method according to claim 1 wherein the disulfide has the formula ##STR8##
Claim 4
Dependent Claim
29 words
A method according to claim 2 wherein the curing reaction is conducted at a temperature in the range of about 250°-275° C. for a period of about 2-6 hours.
Claim 5
Dependent Claim
13 words
A method according to claim 3 wherein the polyarylene sulfide is polyphenylene sulfide.
Claim 6
Dependent Claim
31 words
A method according to claim 4 wherein X is a hydroxy, amino, isocyanato, cyano, keto or carboxy group on an anhydride, halide, ester, amide or imide derivative of a carboxy group.
Claim 7
Dependent Claim
12 words
A method according to claim 5 wherein the disulfide is bis(4-aminophenyl) disulfide.
Claim 8
Dependent Claim
12 words
A method according to claim 5 wherein the disulfide is 4,4'-bis(4-carboxyphthalimidophenyl) disulfide.
Claim 9
Dependent Claim
17 words
A method according to claim 5 wherein the disulfide is 4,4'-bis[4-(3,4-dicarboxybenzoyl)phthalimidophenyl] disulfide or a functional derivative thereof.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-13 | 1994-11-12 | 1995-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-13 | 1998-11-12 | 1999-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-13 | 2002-11-12 | 2003-05-14 | $7700.00 | Window Closed / Lapsed |