Patent US3635845A successfully refreshed from Google Patents.
US3635845A
Expired / Lapsed
US
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Curable compositions of matter containing a polyepoxide and a hydrantoin compound
Assignee: BASF Schweiz AG
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Filing: 1969-11-18
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Granted: 1972-01-18
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Expires: 1989-11-18
Abstract
Abstract Curable moulding, coating and adhesive compositions which contain a polyepoxide compound, for example a liquid polyglycidyl ether of bisphenol A and, as the curing agent, a 1,1''-methylenebis-(3- gamma -aminopropyl-hydantoin), for example 1,1''methylene-bis-(3- gamma -aminopropyl-5,5-dimethyl-hydantoin). The curing can take place at relatively low temperatures. The new type of curing agent bridges, in the gradation of the activity, a gap between aliphatic polyamines and cycloaliphatic polyamines. The new curing agents furthermore have the advantage, relative to the aromatic polyamines, of being nontoxic.
Inventors
- 👤 Daniel Porret
- 👤 Juergen Habermeier
- 👤 Wolfgang Seiz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:42
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/12; C07D303/18; C07D303/20; C07D303/24; C07D233/00; C07D233/54; C07D233/66; C07D233/72; C07D303/16; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/5046; C08G59/5053; C08G59/5073; Y; Y10; Y10S; Y10S260/00; Y10S260/34
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
16 words
A composition according to claim 1 which contains 1,1''-methylene-bis-(3- gamma -aminopropyl-5,5-dimethyl-hydantoin) as the curing agent (b).
Claim 2
Dependent Claim
16 words
A composition according to claim 1 which contains 1,1''-methylene-bis-(3- gamma -aminopropyl-5-isopropyl-hydantoin) as the curing agent (b).
Claim 3
Dependent Claim
34 words
A composition according to claim 1 which contains 0.5 to 1.3 equivalent of nitrogen-bonded active hydrogen atoms of the 1,1''-methylene-bis-(N- gamma -aminopropyl-hydantoin) (b) per 1 equivalent of epoxide groups of the polyepoxide compound (a).
Claim 4
Dependent Claim
34 words
A composition according to claim 1 which contains a polyepoxide compound (a) having an average of more than one glycidyl group, Beta -methylglycidyl group or 2.3-epoxycyclopentyl group bonded to a heteroatom in the molecule.
Claim 5
Dependent Claim
20 words
A composition according to claim 1 which contains a polyglycidyl ether of a polyhydric phenol as the polyepoxide compound (a).
Claim 6
Dependent Claim
18 words
A composition according to claim 6 which contains a polyglycidyl ether of 2,2-bis-(p-hydroxyphenyl)-propane as the polyepoxide compound (a).
Claim 7
Dependent Claim
20 words
A composition according to claim 1 which contains a polyglycidyl ester of a polycarboxylic acid as the polyepoxide compound (a).
Claim 8
Dependent Claim
23 words
A composition according to claim 8 which contains the diglycidyl ester of Delta 4-tetrahydrophthalic acid or hexahydrophthalic acid as the polyepoxide compound (a).
Claim 9
Dependent Claim
20 words
A composition according to claim 1 which contains a polyglycidyl ether of a cycloaliphatic polyol as the polyepoxide compound (a).
Claim 10
Dependent Claim
18 words
A composition according to claim 10 which contains the diglycidyl ether of 2,2-bis-(4-hydroxycyclohexyl)-propane as the polyepoxide compound (a).
References Cited (Backward Citations)
GB963507A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |