Patent US3933935A successfully refreshed from Google Patents.
US3933935A
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US
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Flexible vinyl ester resin compositions
Assignee: Dow Chemical Co
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Filing: 1974-08-08
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Granted: 1976-01-20
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Expires: 1994-08-08
Abstract
Abstract Thermosettable vinyl ester resins which provide improved flexibility and abrasion resistance are prepared by reacting a polyepoxide with a dicarboxylic acid half ester of a monomer having the formula ##EQU1## where R is H or methyl, R 1 is a two to four carbon alkylene group, R 2 is H, methyl or ethyl and n has an average value of 3 to 6.
Inventors
- 👤 George Zachariades
- 👤 Rhetta Q. Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:45
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/14; C08G59/18; C08G59/40; C08G59/42
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
62 words
A thermosettable resin composition which comprises the reaction about equivalent proportions of a polyepoxide and a dicarboxylic acid half ester of a monomer having the formula ##EQU3## where R is H or methyl, R 1 is an alkylene group having two to four carbon atoms, R 2 is H, methyl or ethyl and n has an average value of 3 to 6.
Claim 2
Dependent Claim
62 words
A thermosettable resin composition which comprises the reaction about equivalent proportions of a polyepoxide and a dicarboxylic acid half ester of a monomer having the formula ##EQU3## where R is H or methyl, R 1 is an alkylene group having two to four carbon atoms, R 2 is H, methyl or ethyl and n has an average value of 3 to 6.
Claim 3
Dependent Claim
19 words
The composition of claim 1 wherein R 1 is --CH 2 CH 2 -- and R 2 is methyl.
Claim 4
Dependent Claim
13 words
The composition of claim 2 wherein n is 3 and R is H.
Claim 5
Dependent Claim
15 words
The composition of claim 3 wherein said dicarboxylic acid is phthalic, maleic or succinic acid.
Claim 6
Dependent Claim
19 words
The composition of claim 1 where R 1 is --CH 2 CH 2 -- and R 2 is H.
Claim 7
Dependent Claim
13 words
The composition of claim 5 wherein n is 3 and R is H.
Claim 8
Dependent Claim
15 words
The composition of claim 6 wherein said dicarboxylic acid is phthalic, maleic or succinic acid.
Claim 9
Dependent Claim
17 words
The composition of claim 1 further comprising a mixture of said resin with a copolymerizable vinyl monomer.
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) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |