Patent US4347343A successfully refreshed from Google Patents.
US4347343A
Expired / Lapsed
US
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Thickened vinyl ester resin compositions
Assignee: Dow Chemical Co
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Filing: 1981-01-21
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Granted: 1982-08-31
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Expires: 2001-01-21
Abstract
Abstract Curable vinyl ester resin compositions, that can be B-staged with magnesium oxide, comprise a vinyl ester resin having no free carboxyl groups, a reactive diluent, and a thickening agent which is the reaction product of a polyethylene glycol having a molecular weight greater than 2,000 and an anhydride of a polycarboxylic acid with the thickening agent having more than two carboxyl groups per molecule.
Inventors
- 👤 James L. Brewbaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:07
CPC Classifications
C; C08; C08L; C08L63/00; C08L63/10; Y; Y10; Y10S; Y10S525/00; Y10S525/922
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
106 words
A curable polymer composition capable of being B-staged with the addition of magnesium oxide, said composition comprising (1) a curable resin having no free carboxyl groups and which is the reaction product of about equivalent amounts of an unsaturated monocarboxylic acid and a polyglycidyl ether, (2) a reactive diluent and (3) a thickening agent which is a polyether having terminal carboxyl groups and repeating groups consisting essentially of ethoxy moieties, said polyether being, the reaction product of a polyethylene oxide having a molecular weight greater than about 4,500 and the anhydride of a polycarboxylic acid, said thickening agent having more than two carboxyl groups per molecule.
Claim 2
Dependent Claim
106 words
A curable polymer composition capable of being B-staged with the addition of magnesium oxide, said composition comprising (1) a curable resin having no free carboxyl groups and which is the reaction product of about equivalent amounts of an unsaturated monocarboxylic acid and a polyglycidyl ether, (2) a reactive diluent and (3) a thickening agent which is a polyether having terminal carboxyl groups and repeating groups consisting essentially of ethoxy moieties, said polyether being, the reaction product of a polyethylene oxide having a molecular weight greater than about 4,500 and the anhydride of a polycarboxylic acid, said thickening agent having more than two carboxyl groups per molecule.
Claim 3
Dependent Claim
26 words
The composition of claim 1 wherein said thickening agent is present in an amount of from 3 to 10 parts per 100 parts of said resin.
Claim 4
Dependent Claim
15 words
The composition of claim 1 wherein said unsaturated acid is acrylic acid or methacrylic acid.
Claim 5
Dependent Claim
16 words
The composition of claim 1 wherein said polyglycidyl ether is the diglycidyl ether of bisphenol A.
Claim 6
Dependent Claim
16 words
The composition of claim 1 wherein said polyglycidyl ether is the polyglycidyl ether of a novolac.
Claim 7
Dependent Claim
11 words
The composition of claim 1 wherein said reactive diluent is styrene.
Claim 8
Dependent Claim
12 words
The composition of claim 1 wherein said reactive diluent is dicyclopentadienyl acrylate.
Claim 9
Dependent Claim
13 words
The composition of claim 1 wherein said reactive diluent is an alkyl acrylate.
Claim 10
Dependent Claim
13 words
The composition of claim 1 wherein said reactive diluent is a hydroxyalkyl acrylate.
Claim 11
Dependent Claim
11 words
The composition of claim 1 wherein said anhydride is trimellitic anhydride.
Claim 12
Dependent Claim
12 words
The composition of claim 1 wherein said anhydride is benzophenone tetracarboxylic anhydride.
Claim 13
Dependent Claim
27 words
A B-staged curable resin composition containing the composition of claim 1 plus magnesium oxide in an amount greater than 0.1 part per 5 parts of said thickener.
References Cited (Backward Citations)
US3523143A
Cited
US3524902A
Cited
US3669911A
Cited
US3651649A
Cited
US3808114A
Cited
US3882187A
Cited
US3836600A
Cited
US3947422A
Cited
US4085018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-30 | 1986-03-01 | 1986-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-30 | 1990-03-01 | 1990-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-30 | 1994-03-01 | 1994-08-31 | $7700.00 | Window Closed / Lapsed |