US4877851A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blends of copoly(arylene sulfide) and poly(arylene sulfide)
Assignee: Eastman Chemical Co
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Filing: 1988-07-25
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Granted: 1989-10-31
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Expires: 2008-07-25
Abstract
Abstract A composition comprising an admixture of (A) from 99.9 to 90 weight percent, based on the weight of the admixture, of a copoly(arylene sulfide) corresponding to the structure [(--A--S).sub.1-x (--A--S--S).sub.x ].sub.n wherein A is a divalent substituted or unsubstituted aromatic radical, x is in the range of 0.5 to 0.001 and n is at least 200, and (B) from 0.1 to 10 weight percent, based on the weight of the admixture, of a poly(arylene sulfide) corresponding to the structure (--A--S--).sub.r A is the same as above and where r is at least 25.
Inventors
- 👤 David R. Fagerburg
- 👤 Joseph J. Watkins
- 👤 Paul B. Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:06
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/02; C08G75/0204; C08G75/025; C08G75/0263; C08L; C08L81/00; C08L81/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
93 words
A composition comprising an admixture of (A) from 99.9 to 90 weight percent, based on the weight of the admixture, of a copoly(arylene sulfide) corresponding to the structure [(--A--S).sub.1-x (--A--S--S).sub.x ].sub.n wherein A is a divalent substituted or unsubstituted aromatic radical, x is in the range of 0.5 to 0.001 and n is at least 200, and (B) from 0.1 to 10 weight percent, based on the weight of the admixture, of a poly(arylene sulfide) corresponding to the structure (--A--S--).sub.r A is the same as above and where r is at least 25.
Claim 2
Dependent Claim
93 words
A composition comprising an admixture of (A) from 99.9 to 90 weight percent, based on the weight of the admixture, of a copoly(arylene sulfide) corresponding to the structure [(--A--S).sub.1-x (--A--S--S).sub.x ].sub.n wherein A is a divalent substituted or unsubstituted aromatic radical, x is in the range of 0.5 to 0.001 and n is at least 200, and (B) from 0.1 to 10 weight percent, based on the weight of the admixture, of a poly(arylene sulfide) corresponding to the structure (--A--S--).sub.r A is the same as above and where r is at least 25.
Claim 3
Dependent Claim
16 words
The composition of claim 1 wherein the aromatic radical is phenylene, biphenylene, diphenyl ether, or naphthalene.
Claim 4
Dependent Claim
14 words
The composition of claim 2 wherein the aromatic radical is unsubstituted phenylene or biphenylene.
Claim 5
Dependent Claim
12 words
The composition of claim 3 wherein the aromatic radical is unsubstituted phenylene.
Claim 6
Dependent Claim
90 words
A composition comprising admixture of (A) from 99.8 to 95 weight percent, based on the weight of the admixture, of a copoly(phenylene sulfide) corresponding to the structure [(--A--S).sub.1-x (--A--S--S).sub.x ].sub.n wherein A is a divalent unsubstituted phenylene radical, x is in the range of 0.5 to 0.001, and n is at least 400, and (B) from 0.2 to 5 weight percent, based on the weight of the admixture, of a poly(phenylene sulfide) corresponding to the structure (--A--S--).sub.r where A is the same as above and r is at least 25.
Claim 7
Dependent Claim
90 words
A composition comprising admixture of (A) from 99.8 to 95 weight percent, based on the weight of the admixture, of a copoly(phenylene sulfide) corresponding to the structure [(--A--S).sub.1-x (--A--S--S).sub.x ].sub.n wherein A is a divalent unsubstituted phenylene radical, x is in the range of 0.5 to 0.001, and n is at least 400, and (B) from 0.2 to 5 weight percent, based on the weight of the admixture, of a poly(phenylene sulfide) corresponding to the structure (--A--S--).sub.r where A is the same as above and r is at least 25.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1992-10-30 | 1993-05-01 | 1993-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-30 | 1997-05-01 | 1997-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-30 | 2001-05-01 | 2001-10-31 | $7700.00 | Window Closed / Lapsed |