Patent US3607833A successfully refreshed from Google Patents.
US3607833A
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Prepolymer of epoxy resin and tris(hydroxymethyl) aminomethane and curable composition thereof
Assignee: Vanderbilt Chemicals LLC
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Filing: 1969-10-03
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Granted: 1971-09-21
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Expires: 1989-10-03
Abstract
Abstract The specification relates to accelerating the cure of epoxy resins by incorporating a prepolymer of an epoxy resin with tris(hydroxymethyl) aminomethane. The specification also relates to alcohol solutions of this prepolymer for the preparation of paint films and the like.
Inventors
- 👤 Ronald L De Hoff
- 👤 George D Grieco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:07
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/62; C08G59/64
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
49 words
A curable composition consisting essentially of (1) a prepolymer which is a reaction product formed by the process consisting of heating at elevated temperatures from 100 parts of vicinal epoxy resin as a polyepoxide and 5 to 14 parts of tris(hydroxymethyl)aminomethane and (2) a curing agent for epoxy resin.
Claim 2
Dependent Claim
53 words
A curable composition consisting essentially of (1) a prepolymer which is a reaction product formed by the process consisting of heating at elevated temperatures from 100 parts of vicinal epoxy resin as a polyepoxide and 5 to 14 parts of tris(hydroxymethyl)aminomethane, (2) a C1-C5 alkanol and (3) a curing agent for epoxy resin.
Claim 3
Dependent Claim
15 words
The prepolymer to claim 1 in which the epoxy resin is diglycidyl ether of 2,2''bis-(p-hydroxyphenyl)-propane.
Claim 4
Dependent Claim
22 words
The composition according to claim 2 which also contains a reactive diluent for epoxy resin, a nonreactive organic solvent and a filler.
Claim 5
Dependent Claim
12 words
The composition according to claim 3 in which the alkanol is ethanol.
Claim 6
Dependent Claim
54 words
A process for accelerating the cure of epoxy resin which comprises forming by the process consisting of heating at elevated temperatures a prepolymer of 100 parts of vicinal epoxy resin as a polyepoxide and 5 to 14 parts of tris(hydroxymethyl)aminomethane and curing the prepolymer in the presence of a curing agent for epoxy resin.
Claim 7
Dependent Claim
56 words
A process for providing cured epoxy resin which comprises forming by the process consisting of heating at elevated temperatures a prepolymer of 100 parts of vicinal epoxy resin as a polyepoxide and 5 to 14 parts of tris(hydroxymethyl)aminomethane and curing the prepolymer in the presence of a curing agent for epoxy resin and a C1-C5 alkanol.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |