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US 4,098,731 AGranted
Process for the production of foams
AssigneeBayer Aktiengesellschaft
InventorsWulf von Bonin, Helmut Kleimann, Jozsef Ivanyi
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Abstract
The present invention relates to the production in closed molds, of foams with outstanding mold-release properties. These improved properties are obtained by including in the foamable mixture salts of saturated or unsaturated aliphatic or cycloaliphatic carboxylic acids having at least 8 carbon atoms and tertiary amines of the type in which the atom ratio of tertiary amine nitrogen to carbon in the molecule is between 1:3 and 1:12.
Claims7
In a process for the production of mold-formed foam having an impervious outer skin with self-releasing properties, said process comprising:
- (A) introducing a foamable reaction mixture into a closed mold, said mixture consisting essentially of:
- (i) an organic polyisocyanate,
- (ii) a compound having reactive hydrogen atoms and having a molecular weight of from 62 to 10,000,
- (iii) water and/or organic blowing agents,
- (iv) an isocyanate addition catalyst, and
- (v) an internal mold release agent,
- (B) allowing said foamable reaction mixture to foam in said mold, and
- (C) removing the resultant product from said mold, the improvement wherein said mold release agent consists of salts of saturated or unsaturated aliphatic or cycloaliphatic, carboxylic acids having at least 8 carbon atoms and tertiary amines of the type in which the atom ratio of the tertiary amine nitrogen to carbon in the molecule is between 1:3 and 1:12 and being devoid of amide or ester linkages.
5 more elements
Dependencies are inferred from the claim text.