US4066628A
Expired / Lapsed
US
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Oxazolidone catalyst
Assignee: Mitsubishi Chemical Corp
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Filing: 1976-08-02
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Granted: 1978-01-03
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Expires: 1996-08-02
Abstract
Abstract Oxazolidones are produced by reacting an organic isocyanate with an epoxide in the presence of a catalyst selected from the group consisting of dialkyl zinc, zinc carboxylate, organozinc chelate compound and trialkyl aluminum. Polyoxazolidones produced according to the present invention are useful starting materials for the manufacture of a wide variety of product including foams, coatings, adhesives, elastomers and the like.
Inventors
- 👤 Kaneyoshi Ashida
- 👤 Kurt C. Frisch
- 👤 Panagiotis Kordomenos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:30
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/003; C07; C07D; C07D263/00; C07D263/02; C07D263/08; C07D263/16; C07D263/18; C07D263/20; C07D263/24; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08G18/222
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
66 words
A process for preparing oxazolidones which comprises reacting an organic isocyanate with an epoxide in the presence of from 0.001 to 5 weight percent, based on the reactants, of a catalyst selected from the group consisting of ZnR 2 , Zn(OCOR) 2 , ZnX and AlR 3 wherein R is an alkyl group having 1 to 12 carbon atoms and X is an organic bidentate group.
Claim 2
Dependent Claim
66 words
A process for preparing oxazolidones which comprises reacting an organic isocyanate with an epoxide in the presence of from 0.001 to 5 weight percent, based on the reactants, of a catalyst selected from the group consisting of ZnR 2 , Zn(OCOR) 2 , ZnX and AlR 3 wherein R is an alkyl group having 1 to 12 carbon atoms and X is an organic bidentate group.
Claim 3
Dependent Claim
66 words
A process for preparing polyoxazolidones which comprises reacting an organic polyisocyanate with a polyepoxide in the presence of from 0.001 to 5 weight percent, based on the reactants, of a catalyst selected from the group consisting of ZnR 2 , Zn(OCOR) 2 , ZnX and AlR 3 wherein R is an alkyl group having 1 to 12 carbon atoms and X is an organic bidentate group.
Claim 4
Dependent Claim
66 words
A process for preparing polyoxazolidones which comprises reacting an organic polyisocyanate with a polyepoxide in the presence of from 0.001 to 5 weight percent, based on the reactants, of a catalyst selected from the group consisting of ZnR 2 , Zn(OCOR) 2 , ZnX and AlR 3 wherein R is an alkyl group having 1 to 12 carbon atoms and X is an organic bidentate group.
Claim 5
Dependent Claim
24 words
A process according to claim 2 wherein the catalyst is ZnR 2 wherein R is an alkyl group having 1 to 12 carbon atoms.
Claim 6
Dependent Claim
12 words
A process according to claim 3, wherein the catalyst is diethyl zinc.
Claim 7
Dependent Claim
12 words
A process according to claim 2 wherein the catalyst is zinc octoate.
Claim 8
Dependent Claim
12 words
A process according to claim 2 wherein the catalyst is zinc acetylacetonate.
Claim 9
Dependent Claim
29 words
A process according to claim 2 wherein 4,4'-methylene bis(cyclohexyl isocyanate) is used as the organic polyisocyanate at a ratio of less than one equivalent per equivalent of the polyepoxide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-02 | 1981-07-04 | 1982-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-02 | 1985-07-04 | 1986-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-02 | 1989-07-04 | 1990-01-03 | $7700.00 | Window Closed / Lapsed |