Patent US4336359A successfully refreshed from Google Patents.
US4336359A
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Nitric acid stabilized thermosettable resins
Assignee: Dow Chemical Co
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Filing: 1981-06-26
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Granted: 1982-06-22
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Expires: 2001-06-26
Abstract
Abstract Nitric acid, alone or in combination with phenothiazine, increases the storage life of vinyl ester resins or unsaturated polyesters without adversely suppressing the exotherm or affecting their curability.
Inventors
- 👤 Virginia B. Messick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:54
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/28; Y; Y10; Y10S; Y10S525/00; Y10S525/922
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
29 words
A thermosettable resin composition having improved storage stability, said composition comprising a vinyl ester resin, an unsaturated polyester or a mixture thereof and a stabilizing amount of nitric acid.
Claim 2
Dependent Claim
29 words
A thermosettable resin composition having improved storage stability, said composition comprising a vinyl ester resin, an unsaturated polyester or a mixture thereof and a stabilizing amount of nitric acid.
Claim 3
Dependent Claim
16 words
The composition of claim 1 wherein said composition contains a vinyl monomer as a reactive diluent.
Claim 4
Dependent Claim
11 words
The composition of claim 2 wherein said vinyl monomer is styrene.
Claim 5
Dependent Claim
30 words
The composition of claim 1 wherein said nitric acid is present in an amount of 50 to 1000 parts per million based on the weight of resin and vinyl monomer.
Claim 6
Dependent Claim
27 words
The composition of claim 1 wherein said vinyl ester resin is the reaction product of essentially equivalent amounts of an unsaturated monocarboxylic acid and an epoxy novolac.
Claim 7
Dependent Claim
12 words
The composition of claim 5 wherein said monocarboxylic acid is methacrylic acid.
Claim 8
Dependent Claim
30 words
The composition of claim 1 wherein said vinyl ester resin is the diester of an unsaturated monocarboxylic acid and a diglycidyl ether of a polyhydric alcohol or a polyhydric phenol.
Claim 9
Dependent Claim
16 words
The composition of claim 7 wherein said diglycidyl ether is the diglycidyl ether of a bisphenol.
Claim 10
Dependent Claim
12 words
The composition of claim 8 wherein said monocarboxylic acid is methacrylic acid.
Claim 11
Dependent Claim
11 words
The composition of claim 8 wherein said bisphenol is bisphenol A.
Claim 12
Dependent Claim
14 words
The composition of claim 1 wherein said composition contains a reinforcing material or filler.
Claim 13
Dependent Claim
14 words
The composition of claim 1 wherein the nitric acid is present together with phenothiazine.
References Cited (Backward Citations)
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US3683045A
Cited
US3882187A
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US3775513A
Cited
US3736289A
Cited
US3980731A
Cited
US4129609A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-21 | 1985-12-21 | 1986-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-21 | 1989-12-21 | 1990-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-21 | 1993-12-21 | 1994-06-22 | $7700.00 | Window Closed / Lapsed |