US3758629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
By reaction with a di-2-oxazoline cross linking of addition polymers containing combined free carboxyl
Assignee: Dow Chemical Co
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Filing: 1971-05-07
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Granted: 1973-09-11
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Expires: 1991-05-07
Abstract
Abstract Cross-linking of addition polymers containing free carboxyl groups by utilizing, as a cross-linking agent, from 0.1 to 10 equivalents per equivalent of free carboxyl of a di-2-oxazoline of the formula IN THE ABOVE FORMULAE EACH R represents hydrogen or alkyl having from one to four carbon atoms; X'' represents ethyleneoxy or propyleneoxy; R'' represents hydrogen or alkyl having from one to three carbon atoms; X'''' represents oxygen or sulfur; and R'''' represents alkylene of from two to 20 carbon atoms, arylene of from six to 10 carbon atoms or arylakylene of from seven to 15 carbon atoms.
Inventors
- 👤 B Thill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:13
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/35
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
24 words
The cross-linked addition polymer of claim 1 wherein said addition polymer contains from about 1 to 20 percent by weight of free carboxyl (-COOH).
Claim 2
Dependent Claim
22 words
The cross-linked addition polymer of claim 2 wherein said addition polymer is an interpolymer of methyl methacrylate, butyl acrylate and methacrylic acid.
Claim 3
Dependent Claim
21 words
The cross-linked addition polymer of Claim 3 wherein said di-2-oxazoline is selected from the group consisting of 2,2''-thiodiethylenebis-2-oxazoline, 2,2''-oxydiethylenebis-2-oxazoline and 2,2''-tetramethylenebis-2-oxazoline.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |