US4769424A
Expired / Lapsed
US
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Polyarylene sulfide block copolymers, method for making, and use
Assignee: General Electric Co
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Filing: 1987-06-01
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Granted: 1988-09-06
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Expires: 2007-06-01
Abstract
Abstract Block copolymers of polyarylene sulfide with either polyimide, or polydiorgano siloxane are provided. Various methods for making such block copolymers are shown which are useful as compatabilizers for blends of polyarylene sulfide with polyimides and polydiorgano siloaxanes.
Inventors
- 👤 Tohru Takekoshi
- 👤 Patricia P. Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:22
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1057; C08G73/106; C08G73/1064; C08G77/00; C08G77/42
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
25 words
Block copolymers comprising by weight, (A) 1 to 99% of polyarylene sulfide blocks intercondensed through imide linkages with, (B) 99 to 1% of polyaromaticetherimide blocks.
Claim 2
Dependent Claim
25 words
Block copolymers comprising by weight, (A) 1 to 99% of polyarylene sulfide blocks intercondensed through imide linkages with, (B) 99 to 1% of polyaromaticetherimide blocks.
Claim 3
Dependent Claim
21 words
A block copolymer in accordance with claim 1, where the polyaromaticetherimide block is the intercondensation product of 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride and methaphenylenediamine.
Claim 4
Dependent Claim
18 words
A block copolymer in accordance with claim 1, where the polyarylene sulfide block is a polyphenylene sulfide block.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-06 | 1992-03-07 | 1992-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-06 | 1996-03-07 | 1996-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-06 | 2000-03-07 | 2000-09-06 | $7700.00 | Window Closed / Lapsed |