Patent US3960818A successfully refreshed from Google Patents.
US3960818A
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Ordered aromatic copolyamide urea polymer
Assignee: Bridgestone Firestone Inc
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Filing: 1974-11-29
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Granted: 1976-06-01
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Expires: 1994-11-29
Abstract
Abstract An ordered copolyamide-urea-type polymer is prepared which is particularly useful for the production of synthetic fibers, films, etc. A representative polymer is that derived from p-phenylene terephthalamide and p-phenyleneurea. The polymer may contain nitrogen-substituted urea groups if the diamine which is reacted with urea is substituted at nitrogen with one or more lower alkyl groups such as methyl, ethyl, propyl, etc.
Inventors
- 👤 John W. Spiewak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:21
CPC Classifications
C; C08; C08G; C08G71/00; C08G71/02; C08G69/00; C08G69/02; C08G69/26; C08G69/32
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
165 words
An ordered copolymer having the formula ---NH--Ar--NH--C:O--NH--Ar'--NH-C:O-Ar"--C:O--- in which Ar and Ar' are of the class consisting of (a) arylene and (b) diarylene X groups in which X may be a covalent bond or a group from the class consisting of sulfonyl, oxygen, alkylene of 1 to 10 carbon atoms, and Ar" is the residue of diacid chloride after removal of the chlorine atoms of the formula ##SPC3## in which Y is from the class consisting of sulfonyl, oxygen, carbonyl, carbonate, sulfide, disulfide, sulfinyl, azo, (CH 2 ) n in which n may be 1 to 50 and (CH 2 ) n is representative of an alkylene or unsaturated moiety in which the unsaturation may be isolated or the carbon groups may be conjugated with each other and R 1 , R 2 , R 3 , R 4 , R' 1 , R' 2 , R' 3 and R' 4 are from the class consisting of hydrogen, alkyl, aryl, heteroalkyl, heteroaryl, alkenyl and alkynyl.
Claim 2
Dependent Claim
165 words
An ordered copolymer having the formula ---NH--Ar--NH--C:O--NH--Ar'--NH-C:O-Ar"--C:O--- in which Ar and Ar' are of the class consisting of (a) arylene and (b) diarylene X groups in which X may be a covalent bond or a group from the class consisting of sulfonyl, oxygen, alkylene of 1 to 10 carbon atoms, and Ar" is the residue of diacid chloride after removal of the chlorine atoms of the formula ##SPC3## in which Y is from the class consisting of sulfonyl, oxygen, carbonyl, carbonate, sulfide, disulfide, sulfinyl, azo, (CH 2 ) n in which n may be 1 to 50 and (CH 2 ) n is representative of an alkylene or unsaturated moiety in which the unsaturation may be isolated or the carbon groups may be conjugated with each other and R 1 , R 2 , R 3 , R 4 , R' 1 , R' 2 , R' 3 and R' 4 are from the class consisting of hydrogen, alkyl, aryl, heteroalkyl, heteroaryl, alkenyl and alkynyl.
Claim 3
Dependent Claim
13 words
The polymer of claim 1 in which Ar and Ar' are both p-phenylene.
Claim 4
Dependent Claim
10 words
The polymer of claim 1 in which Ar" is terephthaloyl.
Claim 5
Dependent Claim
8 words
A fiber of the polymer of claim 1.
Claim 6
Dependent Claim
8 words
A fiber of the polymer of claim 2.
Claim 7
Dependent Claim
8 words
A fiber of the polymer of claim 3.
References Cited (Backward Citations)
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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) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |