US4284728A
Expired / Lapsed
US
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HR foams made with reactive polyol compositions having improved stability
Assignee: BASF Corp
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Filing: 1980-05-05
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Granted: 1981-08-18
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Expires: 2000-05-05
Abstract
Abstract HR or high resiliency polyurethane foams having improved processing stability are prepared from reactive urethane formation promoting active hydrogen-containing compositions which have been pre-treated with carbon dioxide or a weak acid. The pre-treated active hydrogen-containing composition is, then, reacted with an organic polyisocyante to form the foams hereof.
Inventors
- 👤 John G. Demou
- 👤 Edward R. Pray
- 👤 Robert L. McBrayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:09
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/089; C08G18/28; C08G18/30; C08G18/32; C08G18/3225; C08G18/3253; C08G18/3259; Y; Y10; Y10S; Y10S521/00; Y10S521/904
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
67 words
A reactive mixture for the preparation of a high resiliency polyurethane foam, comprising: (a) an active-hydrogen containing compound; (b) a cross-linking agent containing reactive amine; and (c) an amine reactive stabilizer selected from the group consisting of carbon dioxide and an acid which is reactive with the cross-linking agent such that it reduces the activity thereof to be substantially equal to that of the active-hydrogen containing compound.
Claim 2
Dependent Claim
67 words
A reactive mixture for the preparation of a high resiliency polyurethane foam, comprising: (a) an active-hydrogen containing compound; (b) a cross-linking agent containing reactive amine; and (c) an amine reactive stabilizer selected from the group consisting of carbon dioxide and an acid which is reactive with the cross-linking agent such that it reduces the activity thereof to be substantially equal to that of the active-hydrogen containing compound.
Claim 3
Dependent Claim
13 words
The mixture of claim 1 wherein the amine cross-linking agent is a diamine.
Claim 4
Dependent Claim
24 words
The mixture of claim 2 wherein the cross-linking agent is selected from the group consisting of methylene dianiline, isophorone diamine, bis(p-aminocyclohexyl)methane and mixtures thereof.
Claim 5
Dependent Claim
11 words
The mixture of claim 3 wherein the cross-linking agent is bis(p-aminocyclohexyl)methane.
Claim 6
Dependent Claim
13 words
The mixture of claim 1 wherein the active-hydrogen containing compound is a polyol.
Claim 7
Dependent Claim
26 words
The mixture of claim 1 wherein the stabilizer is present in an amount ranging from about 2.5 to 0.1 moles thereof per mole of cross-linking agent.
Claim 8
Dependent Claim
36 words
The mixture of claim 1 wherein the stabilizer is selected from the group consisting of carbonic acid, carbolic acid, oxalic acid, formic acid, the homologs of oxalic acid, the homologs of formic acid and mixtures thereof.
Claim 9
Independent Claim
41 words
A method for stabilizing a reactive mixture of an active-hydrogen containing compound and a cross-linking agent used for the preparation of high resiliency polyurethane foams, comprising: introducing into the mixture a stabilizer which is either carbon dioxide or a weak acid.
Claim 10
Independent Claim
41 words
A method for stabilizing a reactive mixture of an active-hydrogen containing compound and a cross-linking agent used for the preparation of high resiliency polyurethane foams, comprising: introducing into the mixture a stabilizer which is either carbon dioxide or a weak acid.
Claim 11
Dependent Claim
12 words
The method of claim 8 wherein the cross-linking agent is a diamine.
Claim 12
Dependent Claim
24 words
The method of claim 9 wherein the cross-linking agent is selected from the group consisting of methylene dianiline, isophorone diamine, bis(p-aminocyclohexyl)methane and mixtures thereof.
Claim 13
Dependent Claim
11 words
The method of claim 10 wherein the cross-linking agent is bis(p-aminocyclohexyl)methane.
Claim 14
Dependent Claim
12 words
The method of claim 11 wherein the active-hydrogen-containing compound is a polyol.
Claim 15
Dependent Claim
26 words
The method of claim 12 wherein the stabilizer is present in an amount ranging from about 0.1 to 3.5 moles thereof per mole of cross-linking agent.
Claim 16
Dependent Claim
36 words
The method of claim 13 wherein the stabilizer is selected from the group consisting of carbonic acid, carbolic acid, oxalic acid, formic acid, the homologs of oxalic acid, the homologs of formic acid and mixtures thereof.
Claim 17
Dependent Claim
20 words
A high resiliency polyurethane foam comprising the reaction product of an organic polyisocyanate and the reaction mixture of claim 1.
Claim 18
Dependent Claim
47 words
The polyurethane of claim 15 wherein the organic polyisocyanate corresponds to the formula: R"(NCO).sub.z wherein R is a polyvalent organic radical which is either aliphatic, aromatic, arylalkyl, arylalkyl or mixtures thereof and z is an integer corresponding to the valence of R and is at least 2.
Claim 19
Dependent Claim
13 words
The polyurethane of claim 15 wherein the amine cross-linking agent is a diamine.
Claim 20
Dependent Claim
24 words
The polyurethane of claim 17 wherein the cross-linking agent is selected from the group consisting of methylene dianiline, isophorone diamine, bis(p-aminocyclohexyl)methane and mixtures thereof.
Claim 21
Dependent Claim
11 words
The polyurethane of claim 18 wherein the cross-linking agent is bis(p-aminocyclohexyl)methane.
Claim 22
Dependent Claim
12 words
The polyurethane of claim 19 wherein the active-hydrogen-containing compound is a polyol.
Claim 23
Dependent Claim
27 words
The polyurethane of claim 20 wherein the stabilizer is present in an amount ranging from about 0.05 to about 2.0 moles thereof per equivalent of cross-linking agent.
Claim 24
Dependent Claim
36 words
The polyurethane of claim 21 wherein said acid is selected from the group consisting of carbonic acid, carbolic acid, oxalic acid, formic acid, the homologs of oxalic acid, the homologs of formic acid and mixtures thereof.
Claim 25
Dependent Claim
22 words
A method for preparing a stabilizer, high resiliency polyurethane foam, comprising reacting an organic polyisocyanate and the reaction mixture of claim 1.
Claim 26
Dependent Claim
47 words
The method of claim 23 wherein the organic polyisocyanate corresponds to the formula: R"(NCO).sub.z wherein R is a polyvalent organic radical which is either aliphatic, aromatic, akalkyl, alkaryl or mixtures thereof and z is an integer corresponding to the valence of R and is at least 2.
Claim 27
Dependent Claim
13 words
The method of claim 24 wherein the amine cross-linking agent is a diamine.
Claim 28
Dependent Claim
24 words
The method of claim 25 wherein the cross-linking agent is selected from the group consisting of methylene dianiline, isophorone diamine, bis(p-aminocyclohexyl)methane and mixtures thereof.
Claim 29
Dependent Claim
11 words
The method of claim 26 wherein the cross-linking agent is bis(p-aminocyclohexyl)methane.
Claim 30
Dependent Claim
11 words
The method claim 27 wherein the active-hydrogen-containing compound is a polyol.
Claim 31
Dependent Claim
27 words
The method of claim 28 wherein the stabilizer is present in an amount ranging from about 0.5 to about 2.0 moles thereof per equivalent of cross-linking agent.
Claim 32
Dependent Claim
36 words
The method of claim 29 wherein said acid is selected from the group consisting of carbonic acid, carbolic acid, oxalic acid, formic acid, the homologs of oxalic acid, the homologs of formic acid and mixtures thereof.
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) | 1984-08-17 | 1985-02-16 | 1985-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-17 | 1989-02-16 | 1989-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-17 | 1993-02-16 | 1993-08-18 | $7700.00 | Window Closed / Lapsed |