Patent US3972846A successfully refreshed from Google Patents.
US3972846A
Expired / Lapsed
US
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Curable urethane resin composition comprising a mixture of polyisocyanate, active hydrogen compound and diketo compound
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1974-10-30
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Granted: 1976-08-03
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Expires: 1994-10-30
Abstract
Abstract The present invention provides for a curable polyurethane composition comprising a keto compound and a liquid mixture of an organic aliphatic polyfunctional polyisocyanate and a compound having active hydrogen, the keto compound having the general formula: R1-C-R2-C-R3 PARALLEL PARALLEL OO wherein R1 and R2 are each an alkyl group, an aromatic group, and a heterocyclic group, which may be the same or different, and R2 is a lower alkylene or alkenyl group having 1 to 2 carbon atoms. The curable polyurethane composition is characterized by exhibiting a long pot life due to the existence of the aforementioned keto compound therein.
Inventors
- 👤 Atsuo Mori
- 👤 Shuji Kitamura
- 👤 Kohji Yamatsuta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:59
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/089; C08K; C08K5/00; C08K5/04; C08K5/07; C08G2101/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
107 words
A curable polyurethane composition consisting essentially of a keto compound and a liquid mixture of an organic aliphatic polyfunctional polyisocyanate and a compound having active hydrogen selected from the group consisting of water, polyhydric alcohols, amines and phenols, the keto compound having the general formula: ##EQU2##wherein R 1 and R 3 are each an alkyl group, an aromatic group, or a heterocyclic group, which may be the same or different, and R 2 is a lower alkylene or alkenyl group having 1 to 2 carbon atoms, and the amount of the keto compound being 0.001 to 1 weight part per 100 weight parts of said urethane composition.
Claim 2
Dependent Claim
107 words
A curable polyurethane composition consisting essentially of a keto compound and a liquid mixture of an organic aliphatic polyfunctional polyisocyanate and a compound having active hydrogen selected from the group consisting of water, polyhydric alcohols, amines and phenols, the keto compound having the general formula: ##EQU2##wherein R 1 and R 3 are each an alkyl group, an aromatic group, or a heterocyclic group, which may be the same or different, and R 2 is a lower alkylene or alkenyl group having 1 to 2 carbon atoms, and the amount of the keto compound being 0.001 to 1 weight part per 100 weight parts of said urethane composition.
Claim 3
Dependent Claim
17 words
A composition according to claim 1, wherein the diketo compound is acetylacetone, 1-phenyl-1,3-butane-dione, trans-1,4-diphenyl-2-butene-1,4-one, 4,4,4-trifluoro-1-(2-thienyl)-1,3-butanedione, or 1,3-diphenyl-1,3-propanedione.
Claim 4
Dependent Claim
29 words
A composition according to claim 1, wherein the organic polyfunctional polyisocyanate is methyl diisocyanate, ethyl diisocyanate, n-butyl diisocyanate, n-propyl diisocyanate, octadecyl diisocyanate, hexamethylene diisocyanate, their oligomers or mixtures thereof.
Claim 5
Dependent Claim
13 words
A composition according to claim 1 wherein the liquid mixture contains a solvent.
Claim 6
Dependent Claim
24 words
A composition according to claim 4 wherein the solvent is an ester, a ketone, a cyclic ether, a halogenated hydrocarbon or an aromatic hydrocarbon.
Claim 7
Dependent Claim
17 words
A composition according to claim 1 wherein the compound having an active hydrogen is a polyhydroxy alcohol.
References Cited (Backward Citations)
US3314834A
Cited
US3538027A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-03 | 1980-02-02 | 1980-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-03 | 1984-02-02 | 1984-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-03 | 1988-02-02 | 1988-08-03 | $7700.00 | Window Closed / Lapsed |