Patent US2820839A successfully refreshed from Google Patents.
US4388451A
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Polymers derived from allylphenol or substituted allylphenol and maleic anhydride
Assignee: Ashland LLC
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Filing: 1981-09-28
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Granted: 1983-06-14
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Expires: 2001-09-28
Abstract
Abstract A copolymer formed by reacting maleic anhydride or a maleimide or a mixture of these with an allylphenol, a methallylphenol, or substituted allyl or methallylphenol. The anhydride polymers are characterized as having a 1:1 molar ratio of maleic anhydride to phenol or substituted phenol. The maleic anhydride copolymers are water soluble materials, useful as epoxy resin modifiers and curatives, as ion exchange resins or membranes, laminates, and detergent additives and builders. The maleimide containing copolymers are also useful as epoxy resin modifiers and useful in the production of laminates, composites and coatings.
Inventors
- 👤 Billy M. Culbertson
- 👤 Larry K. Post
- 👤 Ann E. Aulabaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:12
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3746; C11D3/3757; C11D3/3761; B; B01; B01D; B01D71/00; B01D71/06; B01D71/40; B01D71/403; B01D71/44; B01J; B01J39/00; B01J39/08; B01J39/16; B01J39/18; B01J39/20; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/14; C08F212/22; C08F212/24; C08F222/00; C08F222/04; C08F222/06; C08F222/36; C08F222/40; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4042; C08L; C08L63/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
37 words
A polymer consisting of one of the following two general formulas: ##STR11## wherein R 2 represents H or --CH 3 ; A represents terminal groups of a polymer chain; and n is an integer greater than 10.
Claim 2
Dependent Claim
37 words
A polymer consisting of one of the following two general formulas: ##STR11## wherein R 2 represents H or --CH 3 ; A represents terminal groups of a polymer chain; and n is an integer greater than 10.
Claim 3
Dependent Claim
61 words
An addition polymer having the following general formula: ##STR12## wherein R 1 represents H or --CH 3 ; R 2 represents alkyl, substituted alkyl, aryl, substituted aryl, or H; R 6 and R 7 represent alkyl, substituted alkyl, aryl, substituted aryl, H, or a halogen; A represents terminal groups of the polymer chain; and n is an integer greater than 10.
Claim 4
Dependent Claim
61 words
An addition polymer having the following general formula: ##STR12## wherein R 1 represents H or --CH 3 ; R 2 represents alkyl, substituted alkyl, aryl, substituted aryl, or H; R 6 and R 7 represent alkyl, substituted alkyl, aryl, substituted aryl, H, or a halogen; A represents terminal groups of the polymer chain; and n is an integer greater than 10.
Claim 5
Dependent Claim
61 words
An addition polymer having the following general formula: ##STR13## wherein R 1 represents H or --CH 3 ; R 2 represents alkyl, substituted alkyl, aryl, substituted aryl, or H; R 6 and R 7 represent alkyl, substituted alkyl, aryl, substituted aryl, H, or a halogen; A represents terminal groups of the polymer chain; and n is an integer greater than 10.
Claim 6
Dependent Claim
61 words
An addition polymer having the following general formula: ##STR13## wherein R 1 represents H or --CH 3 ; R 2 represents alkyl, substituted alkyl, aryl, substituted aryl, or H; R 6 and R 7 represent alkyl, substituted alkyl, aryl, substituted aryl, H, or a halogen; A represents terminal groups of the polymer chain; and n is an integer greater than 10.
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) | 1986-06-13 | 1986-12-13 | 1987-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-13 | 1990-12-13 | 1991-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-13 | 1994-12-13 | 1995-06-14 | $7700.00 | Window Closed / Lapsed |