US3939119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic polyether-polythioether-polysulfone thermoplastics
Assignee: Uniroyal Chemical Co Inc
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Filing: 1971-05-27
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Granted: 1976-02-17
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Expires: 1991-05-27
Abstract
Abstract Thermoplastic copolymers are formed by the interaction of a 4-mercaptophenol and a dihalo-substituted aromatic sulfone of the structure X-phenylene-SO22-phenylene) yX, wherein y is 1 or 2. The latter are typified by 4,4'-dichlorodiphenyl sulfone and 4,4'-bis(4-chlorophenylsulfonyl)biphenyl. The mercoptophenol may have one or two lower alkyl groups ortho to the hydroxyl.
Inventors
- 👤 Francis X. O'Shea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:55
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/20; C08G75/23; C08G75/02; C08G75/0204; C08G75/0245
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
57 words
Thermoplastic high polymers consisting essentially of the structure [ R ( C.sub.6 H.sub.4 --SO.sub.2 --C.sub.6 H.sub.4 ) .sub.y ] .sub.n, wherein y is 1 or 2, n is an integer from about 30 to 60, R is a mixture of --O--R'--S-- and --S--R'--O--, and R' is selected from the group consisting of phenylene, methylphenylene and dimethylphenylene groups.
Claim 2
Dependent Claim
57 words
Thermoplastic high polymers consisting essentially of the structure [ R ( C.sub.6 H.sub.4 --SO.sub.2 --C.sub.6 H.sub.4 ) .sub.y ] .sub.n, wherein y is 1 or 2, n is an integer from about 30 to 60, R is a mixture of --O--R'--S-- and --S--R'--O--, and R' is selected from the group consisting of phenylene, methylphenylene and dimethylphenylene groups.
Claim 3
Dependent Claim
9 words
Polymers according to claim 1, wherein y is 1.
Claim 4
Dependent Claim
9 words
Polymers according to claim 1, wherein y is 2.
Claim 5
Dependent Claim
13 words
Polymers according to claim 1, wherein R' is --C 6 H 4 --.
Claim 6
Dependent Claim
15 words
Polymers according to claim 1, wherein R' is --C 6 H 3 (CH 3 )--.
Claim 7
Dependent Claim
17 words
Polymers according to claim 1, wherein R' is --C 6 H 2 (CH 3 ) 2 --.
Claim 8
Dependent Claim
62 words
A moldable polyether-polysulfide-polysulfone consisting essentially of the structure [ R--(C 6 H 4 --SO 2 --C 6 H 4 ) y ] n , wherein y is 1 or 2, n is an integer from about 30 to 60, R is a mixture of O--R'S-- and --S--R'--O--, and R' is selected from the group consisting of phenylene, methylphenylene and dimethyl phenylene groups.
Claim 9
Dependent Claim
62 words
A moldable polyether-polysulfide-polysulfone consisting essentially of the structure [ R--(C 6 H 4 --SO 2 --C 6 H 4 ) y ] n , wherein y is 1 or 2, n is an integer from about 30 to 60, R is a mixture of O--R'S-- and --S--R'--O--, and R' is selected from the group consisting of phenylene, methylphenylene and dimethyl phenylene groups.
Claim 10
Independent Claim
81 words
A method of preparing a polyether-polysulfide-polysulfone consisting essentially of reacting substantially equimolar amounts of an alkali metal salt of a 4-mercaptophenol of the formula HO--R'--SH wherein R' is selected from the group consisting of phenylene, methylphenylene and dimethyl phenylene groups and a dihalide compound of the formula X [ C 6 H 4 --SO 2 --C 6 H 4 ] y X wherein y is 1 or 2 and X is chlorine and the reaction is conducted in an anhydrous solvent.
Claim 11
Independent Claim
81 words
A method of preparing a polyether-polysulfide-polysulfone consisting essentially of reacting substantially equimolar amounts of an alkali metal salt of a 4-mercaptophenol of the formula HO--R'--SH wherein R' is selected from the group consisting of phenylene, methylphenylene and dimethyl phenylene groups and a dihalide compound of the formula X [ C 6 H 4 --SO 2 --C 6 H 4 ] y X wherein y is 1 or 2 and X is chlorine and the reaction is conducted in an anhydrous solvent.
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) | 1979-02-16 | 1979-08-18 | 1980-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-16 | 1983-08-18 | 1984-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-16 | 1987-08-18 | 1988-02-17 | $7700.00 | Window Closed / Lapsed |