US5025039A
Expired / Lapsed
US
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Process for the production of molded polyurethane foams and the molded foams obtained by this process
Assignee: Bayer AG
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Filing: 1989-11-22
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Granted: 1991-06-18
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Expires: 2009-11-22
Abstract
Abstract The present invention is directed to a process for the production of molded polyurethane foams having a compact surface and a density of at least 250 kg/m 3 by the in-mold foaming of a reaction mixture containing a) a polyisocyanate component containing at least one aromatic polyisocyanate, b) an isocyanate-reactive component containing at least one organic compound having at least two isocyanate-reactive groups and c) a blowing agent at an isocyanate index of 75 to 1500, characterized in that organic carboxylic acids are used as blowing agents c), optionally in addition to other chemical or physical blowing agents. The present invention is also directed to the molded polyurethane foams obtained by this process.
Inventors
- 👤 Alfred Neuhaus
- 👤 Otto Ganster
- 👤 Richard Kopp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:14
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/2805; C08G18/281; C08G18/30; C08G18/34; C08G2110/00; C08G2110/0041; C08G2110/0066; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
78 words
A process for the production of a molded polyurethane foam having a density of at least 250 kg/m 3 and a compact surface which comprises foaming inside a closed mold at an isocyanate index of about 75 to 1500 a reaction mixture comprising a) a polyisocyanate component comprising at least one aromatic polyisocyanate, b) an isocyanate-reactive component comprising at least one organic compound containing at least two isocyanate-reactive groups, c) a blowing agent comprising an organic carboxylic acid.
Claim 2
Dependent Claim
78 words
A process for the production of a molded polyurethane foam having a density of at least 250 kg/m 3 and a compact surface which comprises foaming inside a closed mold at an isocyanate index of about 75 to 1500 a reaction mixture comprising a) a polyisocyanate component comprising at least one aromatic polyisocyanate, b) an isocyanate-reactive component comprising at least one organic compound containing at least two isocyanate-reactive groups, c) a blowing agent comprising an organic carboxylic acid.
Claim 3
Dependent Claim
23 words
The process of claim 1 wherein said organic carboxylic acid comprises an aliphatic carboxylic acid having a molecular weight of 60 to 300.
Claim 4
Dependent Claim
43 words
The process of claim 1 wherein said organic carboxylic acid additionally contains at least one other isocyanate-reactive group selected from the group consisting of primary alcoholic hydroxyl groups, secondary alcoholic hydroxyl groups, mercapto groups, primary amino groups, secondary amino groups or carboxyl groups.
Claim 5
Dependent Claim
43 words
The process of claim 2 wherein said organic carboxylic acid additionally contains at least one other isocyanate-reactive group selected from the group consisting of primary alcoholic hydroxyl groups, secondary alcoholic hydroxyl groups, mercapto groups, primary amino groups, secondary amino groups or carboxyl groups.
Claim 6
Dependent Claim
13 words
The process of claim 1 wherein said organic carboxylic acid comprises lactic acid.
Claim 7
Dependent Claim
32 words
The process of claim 1 wherein said blowing agent comprises an aqueous solution containing about 80 to 99% by weight of lactic acid and about 1 to 20% by weight of water.
Claim 8
Dependent Claim
78 words
A process for the production of a molded polyurethane foam having a density of at least 250 kg/m 3 and a compact surface which comprises foaming inside a closed mold at an isocyanate index of about 80 to 150 a reaction mixture comprising a) a polyisocyanate component comprising at least one aromatic polyisocyanate, b) an isocyanate-reactive component comprising at least one organic compound containing at least two isocyanate-reactive groups, c) a blowing agent comprising an organic carboxylic acid.
Claim 9
Dependent Claim
78 words
A process for the production of a molded polyurethane foam having a density of at least 250 kg/m 3 and a compact surface which comprises foaming inside a closed mold at an isocyanate index of about 80 to 150 a reaction mixture comprising a) a polyisocyanate component comprising at least one aromatic polyisocyanate, b) an isocyanate-reactive component comprising at least one organic compound containing at least two isocyanate-reactive groups, c) a blowing agent comprising an organic carboxylic acid.
Claim 10
Dependent Claim
23 words
The process of claim 7 wherein said organic carboxylic acid comprises an aliphatic carboxylic acid having a molecular weight of 60 to 300.
Claim 11
Dependent Claim
43 words
The process of claim 7 wherein said organic carboxylic acid additionally contains at least one other isocyanate-reactive group selected from the group consisting of primary alcoholic hydroxyl groups, secondary alcoholic hydroxyl groups, mercapto groups, primary amino groups, secondary amino groups or carboxyl groups.
Claim 12
Dependent Claim
43 words
The process of claim 8 wherein said organic carboxylic acid additionally contains at least one other isocyanate-reactive group selected from the group consisting of primary alcoholic hydroxyl groups, secondary alcoholic hydroxyl groups, mercapto groups, primary amino groups, secondary amino groups or carboxyl groups.
Claim 13
Dependent Claim
13 words
The process of claim 7 wherein said organic carboxylic acid comprises lactic acid.
Claim 14
Dependent Claim
32 words
The process of claim 7 wherein said blowing agent comprises an aqueous solution containing about 80 to 99% by weight of lactic acid and about 1 to 20% by weight of water.
Claim 15
Dependent Claim
80 words
A molded polyurethane foam having a density of at least 250 kg/m 3 and a compact surface which is prepared by a process which comprises foaming inside a closed mold at an isocyanate index of about 75 to 1500 a reaction mixture comprising a) a polyisocyanate component consisting essentially of one or more aromatic polyisocyanates, b) an isocyanate-reactive component comprising at least one organic compound containing at least two isocyanate-reactive groups, c) a blowing agent comprising an organic carboxylic acid.
Claim 16
Dependent Claim
80 words
A molded polyurethane foam having a density of at least 250 kg/m 3 and a compact surface which is prepared by a process which comprises foaming inside a closed mold at an isocyanate index of about 75 to 1500 a reaction mixture comprising a) a polyisocyanate component consisting essentially of one or more aromatic polyisocyanates, b) an isocyanate-reactive component comprising at least one organic compound containing at least two isocyanate-reactive groups, c) a blowing agent comprising an organic carboxylic acid.
Claim 17
Dependent Claim
25 words
The molded polyurethane foam of claim 13 wherein said organic carboxylic acid comprises an aliphatic carboxylic acid having a molecular weight of 60 to 300.
Claim 18
Dependent Claim
45 words
The molded polyurethane foam of claim 13 wherein said organic carboxylic acid additionally contains at least one other isocyanate-reactive group selected from the group consisting of primary alcoholic hydroxyl groups, secondary alcoholic hydroxyl groups, mercapto groups, primary amino groups, secondary amino groups or carboxyl groups.
Claim 19
Dependent Claim
45 words
The molded polyurethane foam of claim 14 wherein said organic carboxylic acid additionally contains at least one other isocyanate-reactive group selected from the group consisting of primary alcoholic hydroxyl groups, secondary alcoholic hydroxyl groups, mercapto groups, primary amino groups, secondary amino groups or carboxyl groups.
Claim 20
Dependent Claim
15 words
The molded polyurethane foam of claim 13 wherein said organic carboxylic acid comprises lactic acid.
Claim 21
Dependent Claim
34 words
The molded polyurethane foam of claim 13 wherein said blowing agent comprises an aqueous solution containing about 80 to 99% by weight of lactic acid and about 1 to 20% by weight of water.
Claim 22
Dependent Claim
80 words
A molded polyurethane foam having a density of at least 250 kg/m 3 and a compact surface which is prepared by a process which comprises foaming inside a closed mold at an isocyanate index of about 80 to 150 a reaction mixture comprising a) a polyisocyanate component consisting essentially of one or more aromatic polyisocyanates, b) an isocyanate-reactive component comprising at least one organic compound containing at least two isocyanate-reactive groups, c) a blowing agent comprising an organic carboxylic acid.
Claim 23
Dependent Claim
80 words
A molded polyurethane foam having a density of at least 250 kg/m 3 and a compact surface which is prepared by a process which comprises foaming inside a closed mold at an isocyanate index of about 80 to 150 a reaction mixture comprising a) a polyisocyanate component consisting essentially of one or more aromatic polyisocyanates, b) an isocyanate-reactive component comprising at least one organic compound containing at least two isocyanate-reactive groups, c) a blowing agent comprising an organic carboxylic acid.
Claim 24
Dependent Claim
25 words
The molded polyurethane foam of claim 19 wherein said organic carboxylic acid comprises an aliphatic carboxylic acid having a molecular weight of 60 to 300.
Claim 25
Dependent Claim
45 words
The molded polyurethane foam of claim 19 wherein said organic carboxylic acid additionally contains at least one other isocyanate-reactive group selected from the group consisting of primary alcoholic hydroxyl groups, secondary alcoholic hydroxyl groups, mercapto groups, primary amino groups, secondary amino groups or carboxyl groups.
Claim 26
Dependent Claim
45 words
The molded polyurethane foam of claim 20 wherein said organic carboxylic acid additionally contains at least one other isocyanate-reactive group selected from the group consisting of primary alcoholic hydroxyl groups, secondary alcoholic hydroxyl groups, mercapto groups, primary amino groups, secondary amino groups or carboxyl groups.
Claim 27
Dependent Claim
15 words
The molded polyurethane foam of claim 19 wherein said organic carboxylic acid comprises lactic acid.
Claim 28
Dependent Claim
34 words
The molded polyurethane foam of claim 19 wherein said blowing agent comprises an aqueous solution containing about 80 to 99% by weight of lactic acid and about 1 to 20% by weight of water.
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