US3947522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy resin compositions
Assignee: Dow Chemical Co
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Filing: 1975-02-12
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Granted: 1976-03-30
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Expires: 1995-02-12
Abstract
Abstract Epoxy resins modified with copolymers containing reactive groups such as -COOH are improved by vulcanizing the copolymer with an organic peroxide or sulfur. The resultant epoxy resins are useful in preparing adhesives with improved properties at elevated temperatures.
Inventors
- 👤 Ralph R. Shelley, Jr.
- 👤 James A. Clarke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:51
CPC Classifications
C; C08; C08L; C08L63/00
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
136 words
A curable epoxy resin modified with a sulfur or organic peroxide vulcanized polymer of butadiene and acrylonitrile, methacrylonitrile or mixtures of acrylonitrile and methacrylonitrile comprising A. an epoxy resin having an average of more than one vicinal epoxy group and B. from about 0.03 to about 0.2 parts by weight per part by weight of Component (A) of unvulcanized polymer of butadiene and acrylonitrile, methacrylonitrile or mixtures of acrylonitrile and methacrylonitrile having an average molecular weight of from about 2000 to about 20,000 and containing from about 1.2 to about 5 groups per molecule of a reactive group selected from -COOH, -OH or -SH; wherein said unvulcanized polymer has been reacted into the molecule of the epoxy resin through the -COOH, -OH, or -SH groups and then vulcanizing said polymer with sulfur or an organic peroxide.
Claim 2
Dependent Claim
136 words
A curable epoxy resin modified with a sulfur or organic peroxide vulcanized polymer of butadiene and acrylonitrile, methacrylonitrile or mixtures of acrylonitrile and methacrylonitrile comprising A. an epoxy resin having an average of more than one vicinal epoxy group and B. from about 0.03 to about 0.2 parts by weight per part by weight of Component (A) of unvulcanized polymer of butadiene and acrylonitrile, methacrylonitrile or mixtures of acrylonitrile and methacrylonitrile having an average molecular weight of from about 2000 to about 20,000 and containing from about 1.2 to about 5 groups per molecule of a reactive group selected from -COOH, -OH or -SH; wherein said unvulcanized polymer has been reacted into the molecule of the epoxy resin through the -COOH, -OH, or -SH groups and then vulcanizing said polymer with sulfur or an organic peroxide.
Claim 3
Dependent Claim
35 words
The composition of claim 1 wherein component (A) is the reaction product of 1. a liquid epoxy resin having an average of more than one vicinal epoxy group per molecule with 2. a dihydroxyl-containing compound.
Claim 4
Dependent Claim
20 words
The composition of claim 2 wherein component (A-1) is diglycidyl ether of bisphenol A and component (A-2) is bisphenol A.
Claim 5
Dependent Claim
15 words
The composition of claim 3 wherein component B is a butadiene-acrylonitrile polymer containing -COOH groups.
Claim 6
Dependent Claim
22 words
A curable composition comprising the modified epoxy resin of claim 1 and a curing amount of a curing agent or curing catalyst.
Claim 7
Dependent Claim
22 words
A curable composition comprising the modified epoxy resin of claim 2 and a curing amount of a curing agent or curing catalyst.
Claim 8
Dependent Claim
22 words
A curable composition comprising the modified epoxy resins of claim 3 and a curing amount of a curing agent or curing catalyst.
Claim 9
Dependent Claim
12 words
The curable composition of claim 5 wherein the curing agent is dicyandiamide.
Claim 10
Dependent Claim
12 words
The curable composition of claim 6 wherein the curing agent is dicyandiamide.
Claim 11
Dependent Claim
12 words
The curable composition of claim 7 wherein the curing agent is dicyandiamide.
Claim 12
Dependent Claim
11 words
The cured composition resulting from curing the composition of claim 5.
Claim 13
Dependent Claim
11 words
The cured composition resulting from curing the composition of claim 6.
Claim 14
Dependent Claim
11 words
The cured composition resulting from curing the composition of claim 7.
Claim 15
Dependent Claim
11 words
The cured composition resulting from curing the composition of claim 8.
Claim 16
Dependent Claim
11 words
The cured composition resulting from curing the composition of claim 9.
Claim 17
Dependent Claim
11 words
The cured composition resulting from curing the composition of claim 10.
Claim 18
Dependent Claim
26 words
The curable composition of claim 5 wherein the curing agent is a polyethylene polyamine having an average amine hydrogen equivalent weight of at least about 27.
Claim 19
Dependent Claim
11 words
The cured composition resulting from curing the composition of claim 17.
Claim 20
Dependent Claim
13 words
The composition of claim 1 wherein component A is an epoxy novolac resin.
Claim 21
Dependent Claim
21 words
The composition of claim 19 wherein the epoxy novolac resin has an average functionality of from about 2.05 to about 2.5.
Claim 22
Dependent Claim
24 words
A curable composition comprising the modified epoxy novolac resins of claim 19 and a curing amount of a curing agent or a curing catalyst.
Claim 23
Dependent Claim
24 words
A curable composition comprising the modified epoxy novolac resins of claim 20 and a curing amount of a curing agent or a curing catalyst.
Claim 24
Dependent Claim
11 words
The cured composition resulting from curing the composition of claim 21.
Claim 25
Dependent Claim
11 words
The cured composition resulting from curing the composition of claim 22.
Claim 26
Dependent Claim
25 words
The composition of claim 1 wherein compound (B) has an average of from about 1.7 to about 2.4 -COOH, -OH, or SH groups per molecule.
References Cited (Backward Citations)
US2935488A
Cited
US3135716A
Cited
US3639500A
Cited
US3678130A
Cited
US3873638A
Cited
US3707583A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-30 | 1979-09-29 | 1980-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-30 | 1983-09-29 | 1984-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-30 | 1987-09-29 | 1988-03-30 | $7700.00 | Window Closed / Lapsed |