Patent US4229559A successfully refreshed from Google Patents.
US4229559A
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Novel bis(half ester) and compositions containing the same
Assignee: Union Carbide Corp
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Filing: 1979-05-01
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Granted: 1980-10-21
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Expires: 1999-05-01
Abstract
Abstract This invention is directed to a half ester characterized by the following empirical formula: <IMAGE> (I) <IMAGE> wherein n is a number having an average value of 1.7 to 2, and m is equal to 2-n. Also described herein is a composition comprising said half ester, maleic anhydride and an ethylenically unsaturated monomer, wherein at least 75 mole percent of the half ester is in the maleate form.
Inventors
- 👤 Robert J. Cotter
- 👤 Hugh C. Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:02
CPC Classifications
C; C08; C08F; C08F22/00; C08F22/10; C08F22/12; C08F22/20; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2982; Y10T428/2991; Y10T428/2998; Y10T442/00; Y10T442/20; Y10T442/2926; Y10T442/2992
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
29 words
A half ester characterized by the following empirical formula: ##STR5## wherein n is a number having an average value of 1.7 to 2 and m is equal to 2-n.
Claim 2
Dependent Claim
29 words
A half ester characterized by the following empirical formula: ##STR5## wherein n is a number having an average value of 1.7 to 2 and m is equal to 2-n.
Claim 3
Dependent Claim
56 words
A composition comprising (a) a half ester characterized by the following empirical formula: ##STR6## wherein n is a number having an average value of 1.7 to 2, and m is equal to 2-n, (b) maleic anhydride, and (c) an ethylenically unsaturated monomer, wherein 75 mole percent of the half ester (I) is in the maleate form.
Claim 4
Dependent Claim
56 words
A composition comprising (a) a half ester characterized by the following empirical formula: ##STR6## wherein n is a number having an average value of 1.7 to 2, and m is equal to 2-n, (b) maleic anhydride, and (c) an ethylenically unsaturated monomer, wherein 75 mole percent of the half ester (I) is in the maleate form.
Claim 5
Dependent Claim
15 words
A composition as in claim 2 which contains the residue of an anhydride activating catalyst.
Claim 6
Dependent Claim
20 words
A composition as in claim 3 wherein the anhydride activating catalyst is selected from an amine or a tin compound.
Claim 7
Dependent Claim
11 words
A cured molded article prepared from the composition of claim 2.
Claim 8
Dependent Claim
46 words
A cured molded article as in claim 5 wherein the molded article contains from about 15 to about 80 weight percent, of the weight of the molded article of one or more fibers with a melting point or a glass transition temperature above about 130° C.
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) | 1983-10-21 | 1984-04-21 | 1984-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-21 | 1988-04-21 | 1988-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-21 | 1992-04-21 | 1992-10-21 | $7700.00 | Window Closed / Lapsed |