Method of preparing dimensionally stable, flexible urethane foam and the foam produced thereby
OwnerEugene J. Tylendainventor
Life of this patent
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Abstract
An open celled, dimensionally stable, flexible urethane foam and method of preparing such foam, which method comprises adding a cell opening dimensionally stabilizing amount of an additive to a foamable urethane composition, and thereafter foaming the composition containing such additive to provide a dimensionally stable, flexible urethane foam product. The additive mixture employed comprises an ester reaction product of a long chain acid with polyethylene or polypropylene glycols and/or contains free acid to provide for a desired acid value. The dimensionally stable, flexible foam product produced is particularly useful in the automotive industry as a flexible molded-type foam for use as cushions and seats.
Claims9
A method of preparing a molded, high resilience, urethane foam product of improved dimensional stability, which method comprises:
- (a) adding to a foamable urethane composition a cell opening amount of a cell opening additive, which additive is selected from the group consisting of:
- (i) a fatty acid;
- (ii) a polyethylene or polypropylene polyol fatty acid ester;
- and
- (iii) a mixture of (i) and (ii);
- (b) reacting the foamable urethane composition in a closed mold to provide a high resiliency, molded urethane foam product;
- and
- (c) recovering a molded foam product of improved dimensional stability and having a greater amount of open cells than the molded foam product produced without the cell opening additive.
Dependencies are inferred from the claim text.