Patent US4517313A successfully refreshed from Google Patents.
US4517313A
Expired / Lapsed
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Method of making polyurethane foam
Assignee: SAN ABBOTT Ltd 11 ICHINOHASHI NOMOTO CHO HIGASHIYAMA KU KYOTO JAPAN A JAPAN CORP
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Filing: 1984-04-11
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Granted: 1985-05-14
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Expires: 2004-04-11
Abstract
Abstract A method of manufacturing polyurethane foam by a reaction of organic polyisocyanates and polyols in the presence of a foaming agent and catalysts comprises using as the catalyst, a salt of carbonic acid and polyamine represented by the general formula: ##STR1## wherein R 1 and R 2 are an alkyl group having 1-4 carbon atoms or R 1 and R 2 are combined to form a heterocyclic ring having 3-6 carbon atoms together with a nitrogen atom; and R 3 is an alkylene group.
Inventors
- 👤 Keiichi Nakatani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:20
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/1825; C08G18/1875; Y; Y10; Y10S; Y10S521/00; Y10S521/904; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249958; Y10T428/249961
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
89 words
In a method of manufacturing polyurethane foam by reacting organic polyisocyanates and polyols in the presence of a foaming agent, a catalyst, and the like, the improvement comprising employing as the catalyst, a salt of carbonic acid and a polyamine represented by the general formula: ##STR6## wherein R 1 and R 2 are an alkyl group having 1-4 carbon atoms or R 1 and R 2 are combined to form a heterocyclic ring having 3-6 carbon atoms together with the nitrogen atom; and R 3 is an alkylene group.
Claim 2
Dependent Claim
89 words
In a method of manufacturing polyurethane foam by reacting organic polyisocyanates and polyols in the presence of a foaming agent, a catalyst, and the like, the improvement comprising employing as the catalyst, a salt of carbonic acid and a polyamine represented by the general formula: ##STR6## wherein R 1 and R 2 are an alkyl group having 1-4 carbon atoms or R 1 and R 2 are combined to form a heterocyclic ring having 3-6 carbon atoms together with the nitrogen atom; and R 3 is an alkylene group.
Claim 3
Dependent Claim
94 words
In a method of manufacturing polyurethane molded foam having a surface skin by the reaction of organic polyisocyanates and polyols in the presence of a foaming agent and a catalyst, the improvement comprising employing a salt of carbonic acid as the catalyst and a polyamine represented by the general formula ##STR7## wherein R 1 and R 2 are an alkyl group having 1-4 carbon atoms or R 1 and R 2 are combined to form a heterocyclic ring having 3-6 carbon atoms together with the nitrogen atom; and R 3 is an alkylene group.
Claim 4
Dependent Claim
94 words
In a method of manufacturing polyurethane molded foam having a surface skin by the reaction of organic polyisocyanates and polyols in the presence of a foaming agent and a catalyst, the improvement comprising employing a salt of carbonic acid as the catalyst and a polyamine represented by the general formula ##STR7## wherein R 1 and R 2 are an alkyl group having 1-4 carbon atoms or R 1 and R 2 are combined to form a heterocyclic ring having 3-6 carbon atoms together with the nitrogen atom; and R 3 is an alkylene group.
Claim 5
Dependent Claim
20 words
The method of claim 1 or 2 wherein R 1 and R 2 are methyl and R 3 is n.propylene.
Claim 6
Dependent Claim
20 words
The method of claim 1 or 2 wherein R 1 and R 2 are methyl and R 3 is ethylene.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |