US4539376A
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US
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Cross-linking of maleic anhydride polymers with bicyclic amide acetals
Assignee: Ashland LLC
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Filing: 1984-10-09
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Granted: 1985-09-03
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Expires: 2004-10-09
Abstract
Abstract The process for cross-linking maleic anhydride containing polymers by reaction with bicyclic amide acetals is described.
Inventors
- 👤 Anil B. Goel
- 👤 Harvey J. Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:11
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30; C08F2800/00; C08F2800/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
111 words
The process for cross-linking a maleic anhydide homopolymer or interpolymer with at least one other mono vinyl monomer comprising reacting said homopolymer or interpolymer with a bicyclic amide acetal conforming to the formula ##STR2## wherein R represents hydrogen or an alkyl group having from 1 to 18 carbon atoms, R' represents an alkyl group having from 1 to 18 carbon atoms or an aryl or alkaryl group having from 6 to 18 carbon atoms, and R" represents hydrogen or an alkyl group having from 1 to 18 carbon atoms, an aryl group having from 6 to 12 carbon atoms, or a hydrogen ether group having from 2 to 18 carbon atoms.
Claim 2
Dependent Claim
111 words
The process for cross-linking a maleic anhydide homopolymer or interpolymer with at least one other mono vinyl monomer comprising reacting said homopolymer or interpolymer with a bicyclic amide acetal conforming to the formula ##STR2## wherein R represents hydrogen or an alkyl group having from 1 to 18 carbon atoms, R' represents an alkyl group having from 1 to 18 carbon atoms or an aryl or alkaryl group having from 6 to 18 carbon atoms, and R" represents hydrogen or an alkyl group having from 1 to 18 carbon atoms, an aryl group having from 6 to 12 carbon atoms, or a hydrogen ether group having from 2 to 18 carbon atoms.
Claim 3
Dependent Claim
63 words
The process of claim 1 wherein the maleic anhydride interpolymer is a copolymer of maleic anhydride and at least one other monovinyl monomer selected from the group consisting of a vinyl halide, a vinyl ether, a vinyl hydrocarbon, vinyl pyridine, a vinyl ester, an acrylic acid ester, a methacrylic acid ester, a vinyl ketone and an allyl ester of a saturated carboxylic acid.
Claim 4
Dependent Claim
21 words
The process of claim 2 carried out at a temperature in the range of from about 0° C. to 100° C.
Claim 5
Dependent Claim
16 words
The process of claim 2 in which an interpolymer of maleic anhydride and styrene is employed.
Claim 6
Dependent Claim
20 words
The process of claim 2 wherein an interpolymer of maleic anhydride and C 16 H 33 CH═CH 2 is employed.
Claim 7
Dependent Claim
11 words
The process of claim 2 wherein R,R' and R" are --H.
Claim 8
Dependent Claim
17 words
The process of claim 2 wherein R and R" are --H and R' is --CH 3 .
Claim 9
Dependent Claim
25 words
The process of claim 2 wherein R is --H, R' is --CH 2 CH 3 and R" is --CH 2 OCH 2 CH═CH 2 .
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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) | 1988-09-02 | 1989-03-04 | 1989-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-02 | 1993-03-04 | 1993-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-02 | 1997-03-04 | 1997-09-03 | $7700.00 | Window Closed / Lapsed |