US4058492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for molding polyurethane foams
Assignee: Bayer AG
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Filing: 1976-06-18
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Granted: 1977-11-15
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Expires: 1996-06-18
Abstract
Abstract The mold release properties of a molded polyurethane foam are improved by including in the foamable reaction mixture to be molded a reaction product of a ricinoleic acid and a long chain fatty acid.
Inventors
- 👤 Wulf von Bonin
- 👤 Helmut Kleimann
- 👤 Udo Post
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:31
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0023; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/80; C08G18/8003; C08G18/8051; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S264/00; Y10S264/14
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
142 words
In a process for producing a foam plastic which readily separates from the mold in which it has been foamed wherein a foamable reaction mixture containing an organic polyisocyanate, an organic compound having a molecular weight of about 62 to about 10,000 which contains reactive hydrogen atoms, a catalyst for the acceleration of the isocyanate/reaction hydrogen reaction, and a blowing agent is charged to the mold and reacted, the improvement which comprises adding to said active hydrogen containing component or to the foamable reaction mixture as a third stream an esterification reaction product of about 0.8 mol to about 4 mols of ricinoleic acid and 1 mol of a long chain fatty acid containing more than 8 carbon atoms which is substantially free of alcoholic hydroxyl groups, in an amount sufficient to improve the mold release properties of the resulting molded product.
Claim 2
Dependent Claim
142 words
In a process for producing a foam plastic which readily separates from the mold in which it has been foamed wherein a foamable reaction mixture containing an organic polyisocyanate, an organic compound having a molecular weight of about 62 to about 10,000 which contains reactive hydrogen atoms, a catalyst for the acceleration of the isocyanate/reaction hydrogen reaction, and a blowing agent is charged to the mold and reacted, the improvement which comprises adding to said active hydrogen containing component or to the foamable reaction mixture as a third stream an esterification reaction product of about 0.8 mol to about 4 mols of ricinoleic acid and 1 mol of a long chain fatty acid containing more than 8 carbon atoms which is substantially free of alcoholic hydroxyl groups, in an amount sufficient to improve the mold release properties of the resulting molded product.
Claim 3
Dependent Claim
24 words
The process of claim 1, wherein the long chain fatty acid is oleic acid or a mixture of fatty acids which contains oleic acid.
Claim 4
Dependent Claim
15 words
The method of claim 1 wherein the fatty acid has at least 8 carbon atoms.
Claim 5
Dependent Claim
10 words
The process of claim 1 wherein a surfactant is included.
Claim 6
Dependent Claim
18 words
The process of claim 1 wherein a tertiary amine, a tin catalyst and siloxane-polyalkylene copolymer surfactant are included.
Claim 7
Dependent Claim
21 words
The process of claim 5 wherein the tertiary amine is triethylene diamine and the tin catalyst is a tetravalent tin compound.
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) | 1980-11-14 | 1981-05-16 | 1981-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-14 | 1985-05-16 | 1985-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-14 | 1989-05-16 | 1989-11-15 | $7700.00 | Window Closed / Lapsed |