US4417010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyol/imidazole curing agents for epoxy resins
Assignee: Resolution Performance Products LLC
•
Filing: 1983-02-02
•
Granted: 1983-11-22
•
Expires: 2003-02-02
Abstract
Abstract A liquid curing agent for polyepoxides having terminal epoxide groups is made from a blend of a normally solid aliphatic polyol and a monoimidazole. Cured compositions made from the curing agent and the polyepoxide are useful in various types of plastics applications.
Inventors
- 👤 David A. Shimp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:54
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/62; C08G59/68; C08G59/686
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
28 words
A curing agent for polyepoxides comprising a liquid blend of a monoimidazole compound and an aliphatic polyol selected from the group consisting of N,N'-dihydroxyethyl 5,5-dimethyl hydantoin and trimethylpentanediol.
Claim 2
Dependent Claim
28 words
A curing agent for polyepoxides comprising a liquid blend of a monoimidazole compound and an aliphatic polyol selected from the group consisting of N,N'-dihydroxyethyl 5,5-dimethyl hydantoin and trimethylpentanediol.
Claim 3
Dependent Claim
11 words
The curing agent of claim 1 which is a liquid eutectic.
Claim 4
Dependent Claim
24 words
The curing agent of claim 1 wherein the monoimidazole compound is selected from the group consisting of unsubstituted imidazole, 1-methylimidazole, 2-methylimidazole, 2-ethyl-4-methylimidazole and 2-phenylimidazole.
Claim 5
Dependent Claim
34 words
A curable polyepoxide composition comprising a compatible mixture of a polyepoxide and a liquid blend of a monoimidazole compound and an aliphatic polyol selected from the group consisting of N,N'-dihydroxyethyl 5,5-dimethyl hydantoin and trimethylpentanediol.
Claim 6
Dependent Claim
34 words
A curable polyepoxide composition comprising a compatible mixture of a polyepoxide and a liquid blend of a monoimidazole compound and an aliphatic polyol selected from the group consisting of N,N'-dihydroxyethyl 5,5-dimethyl hydantoin and trimethylpentanediol.
Claim 7
Dependent Claim
13 words
The composition of claim 4 wherein the polyol/imidazole blend is a liquid eutectic.
Claim 8
Dependent Claim
31 words
The composition of claim 4 wherein the polyepoxide is a polyglycidyl ether of p,p'-dihydroxydiphenylpropane and the imidazole is selected from the group consisting of unsubstituted imidazole, 1-methylimidazole, 2-methylimidazole, 2-ethyl-4-methylimidazole and 2-phenylimidazole.
Claim 9
Dependent Claim
19 words
The composition of claim 4 wherein the polyepoxide is a polyglycidyl ether of p,p'-dihydroxydiphenylpropane and the imidazole is 1-methylimidazole.
Claim 10
Dependent Claim
14 words
The composition of claim 4 wherein a siliceous filler or fibrous reinforcement is added.
Claim 11
Dependent Claim
53 words
A process for forming a cured plastic composition which comprises: (a) forming a liquid mixture through either dissolution or eutectic formation between a monoimidazole and a polyol selected from the group consisting of N,N'-dihydroxyethyl 5,5-dimethyl hydantoin and trimethylpentanediol; (b) blending the resulting liquid with a liquid polyepoxide; and (c) curing the resulting blend.
Claim 12
Dependent Claim
53 words
A process for forming a cured plastic composition which comprises: (a) forming a liquid mixture through either dissolution or eutectic formation between a monoimidazole and a polyol selected from the group consisting of N,N'-dihydroxyethyl 5,5-dimethyl hydantoin and trimethylpentanediol; (b) blending the resulting liquid with a liquid polyepoxide; and (c) curing the resulting blend.
Claim 13
Dependent Claim
18 words
The process of claim 9 wherein the polyol is dissolved in the monoimidazole, and the monoimidazole is 1-methylimidazole.
Claim 14
Dependent Claim
27 words
The process of claim 9 wherein a liquid eutectic is formed and the monoimidazole is selected from the group consisting of unsubstituted imidazole, 2-methylimidazole, 2-phenylimidazole, and 2-ethyl-4-methylimidazole.
References Cited (Backward Citations)
US3493630A
Cited
US4066625A
Cited
US3523032A
Cited
US3634323A
Cited
US3635894A
Cited
US3923571A
Cited
US3965211A
Cited
US3931109A
Cited
US4060655A
Cited
US3989673A
Cited
US4069203A
Cited
US4159976A
Cited
US4343843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-21 | 1987-05-23 | 1987-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-21 | 1991-05-23 | 1991-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-21 | 1995-05-23 | 1995-11-22 | $7700.00 | Window Closed / Lapsed |