Patent US1128451A successfully refreshed from Google Patents.
Patent US4282135A successfully refreshed from Google Patents.
US4282135A
Expired / Lapsed
US
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Aminoplast dispersions and polyurethanes prepared therefrom
Assignee: Bayer AG
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Filing: 1980-02-25
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Granted: 1981-08-04
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Expires: 2000-02-25
Abstract
Abstract A stable dispersion of an aminoplast which is obtained by a process which comprises condensing ammonia hydrazine or an organic compound having a molecular weight of from about 50 to about 400 and which contains at least two groups selected from the group consisting of --NH 2 and --NH-- with benzoquinone or a compound of the formula R--CO--R' in which R and R' stand for the same or different radicals selected from the group consisting of hydrogen C 1 -C 4 alkyl groups which may carry chlorine substituents, C 2 -C 4 -alkenyl groups, C 6 -C 10 aryl groups, C 7 -C 10 aralkyl groups, C 5 -C 10 cycloalkyl group and semi-acetals obtained by reacting said carbonyl compounds with monohydric or dihydric aliphatic alcohols having one to ten carbon atoms in an organic polyhydroxyl compound having a molecular weight of from about 250 to about 14000 as the reaction medium.
Inventors
- 👤 Kuno Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:39
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08G; C08G12/00; C08L; C08L71/00; C08L71/02; C08L75/00; C08L75/04; C08J2375/00; C08J2375/04; C08J2461/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
169 words
A process for making a polyurethane resin which comprises reacting an organic polyisocyanate with a stable dispersion having a solids content of about 0.5% to about 80% by weight obtained by condensing ammonia, hydrazine or an organic compound having a molecular weight of from about 50 to about 400 and which contains at least two groups selected from the group consisting of --NH 2 and --NH-- with benzoquinone or a compound of the formula R--Co--R' in which R and R' stand for the same or different radicals selected from the group consisting of hydrogen, C 1 -C 4 alkyl groups which may carry chlorine substituents, C 2 -C 4 -alkenyl groups, C 6 -C 10 aryl groups, C 7 -C 10 aralkyl groups, C 5 -C 10 cycloalkyl groups and semi-acetals obtained by reacting said carbonyl compounds with monohydric or dihydric aliphatic alcohols having one to ten carbon atoms in an organic polyhydroxyl compound having a molecular weight of from about 250 to about 14,000 as the reaction medium.
Claim 2
Dependent Claim
169 words
A process for making a polyurethane resin which comprises reacting an organic polyisocyanate with a stable dispersion having a solids content of about 0.5% to about 80% by weight obtained by condensing ammonia, hydrazine or an organic compound having a molecular weight of from about 50 to about 400 and which contains at least two groups selected from the group consisting of --NH 2 and --NH-- with benzoquinone or a compound of the formula R--Co--R' in which R and R' stand for the same or different radicals selected from the group consisting of hydrogen, C 1 -C 4 alkyl groups which may carry chlorine substituents, C 2 -C 4 -alkenyl groups, C 6 -C 10 aryl groups, C 7 -C 10 aralkyl groups, C 5 -C 10 cycloalkyl groups and semi-acetals obtained by reacting said carbonyl compounds with monohydric or dihydric aliphatic alcohols having one to ten carbon atoms in an organic polyhydroxyl compound having a molecular weight of from about 250 to about 14,000 as the reaction medium.
Claim 3
Dependent Claim
27 words
The process of claim 1, characterized in that the organic polyhydroxyl compound is a polyhydroxyl polyether within a molecular weight range of about 250 to about 4000.
Claim 4
Dependent Claim
19 words
The process of claim 1 wherein the reaction mixture contains a blowing agent and the polyurethane is a foam.
Claim 5
Dependent Claim
34 words
The process of claim 1 wherein the compound containing nitrogen is a urea, a urethane, a thiourea, a polycarboxylic polyamide, a biuret, a guanidine, a melamine, an amine, ammonia, a hydrazine, or a hydrazide.
Claim 6
Dependent Claim
19 words
The process of claim 1 wherein the carbonyl compound is formaldehyde and the nitrogen containing compound contains N-alkylol groups.
References Cited (Backward Citations)
US3304273A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-03 | 1985-02-02 | 1985-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-03 | 1989-02-02 | 1989-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-03 | 1993-02-02 | 1993-08-04 | $7700.00 | Window Closed / Lapsed |