Patent US2350684A successfully refreshed from Google Patents.
US4136241A
Expired / Lapsed
US
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Flexible polyurethane foams based upon the use of a soluble amine salt as crosslinking agent
Assignee: Dow Chemical Co
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Filing: 1978-03-24
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Granted: 1979-01-23
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Expires: 1998-03-24
Abstract
Abstract In a process for producing polyurethane foam, which process comprises reacting in one step a polyether polyol and a crosslinking agent with a polyisocyanate in the presence of a catalyst and a blowing agent, the improvement of employing as at least a major proportion of the crosslinking agent a soluble amine salt obtained by reacting a cycloaliphatic polyamine having at least two primary amine groups with approximately the stoichiometric amount of a carboxylic acid.
Inventors
- 👤 Rudolf Ammann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:54
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6681; C08G18/6685; C08G18/30; C08G18/32; C08G18/3225; C08G18/3253; C08G18/3259; C08G18/3262; C08G2110/00; C08G2110/0008; C08G2110/0041; C08G2110/005; C08G2110/0083
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
77 words
In a process for producing a flexible polyurethane foam, which process comprises reacting in one step a polyether polyol and a crosslinking agent with a polyisocyanate in the presence of a catalyst and a blowing agent, the improvement of employing as at least a major proportion of the crosslinking agent a soluble amine salt obtained by reacting a cycloaliphatic polyamine having at least two primary amine groups with approximately the stoichiometric equivalent amount of a carboxylic acid.
Claim 2
Dependent Claim
77 words
In a process for producing a flexible polyurethane foam, which process comprises reacting in one step a polyether polyol and a crosslinking agent with a polyisocyanate in the presence of a catalyst and a blowing agent, the improvement of employing as at least a major proportion of the crosslinking agent a soluble amine salt obtained by reacting a cycloaliphatic polyamine having at least two primary amine groups with approximately the stoichiometric equivalent amount of a carboxylic acid.
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein the polyamine is an aminocyclohexanemethanamine.
Claim 4
Dependent Claim
10 words
The process of claim 2 wherein the polyamine is isophoronediamine.
Claim 5
Dependent Claim
16 words
The process of claim 1 wherein the carboxylic acid contains from two to thirty carbon atoms.
Claim 6
Dependent Claim
16 words
The process of claim 4 wherein the carboxylic acid contains from three to ten carbon atoms.
Claim 7
Dependent Claim
21 words
The process of claim 5 wherein the carboxylic acid is an aliphatic dicarboxylic acid containing from four to six carbon atoms.
Claim 8
Dependent Claim
17 words
The process of claim 6 wherein the carboxylic acid is succinic acid, adipic acid, or mixtures thereof.
Claim 9
Dependent Claim
28 words
The process of claim 1 wherein the amine salt is employed in amounts of from 0.1 to 10 parts by weight per 100 parts by weight of polyol.
Claim 10
Dependent Claim
28 words
The process of claim 8 wherein the amine salt is employed in amounts of from 1 to 4 parts by weight per 100 parts by weight of polyol.
Claim 11
Dependent Claim
11 words
A flexible polyurethane foam prepared by the process of claim 1.
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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) | 1982-01-22 | 1982-07-24 | 1983-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-22 | 1986-07-24 | 1987-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-22 | 1990-07-24 | 1991-01-23 | $7700.00 | Window Closed / Lapsed |