Polyurethane foams containing organofunctional silanes
AssigneeWm. T. Burnett & Co., Inc.
InventorsMichael S. Buchanan, Gregory B. Davis, Walter V. V. Greenhouse
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Abstract
Polyurethane foams based on reactive polyols and polyisocyanates containing a filler are modified with an organofunctional silane containing a hydrolyzable group and an ethylenically unsaturated linkage. The polyurethane foams have improved physical properties including improved stability, compression set, tear resistance, elongation, and tensile strength.
Claims20
A polyurethane foam structure obtained through the steps of (a) providing an admixture of flexible polyurethane foam and a filler material;
- (b) uniformly applying to said mixture of (a) a liquid flexible resinous binding agent, said admixture of (a) or said binding agent including an organofunctional silane having at least one hydrolyzable group and one ethylenically unsaturated group;
- and (c) curing said composition of (b) so as to provide a cured foam structure;
- the relative amounts of materials in said foam structure being such that for each 100 parts by weight of polyurethane foam particles about 10 to 500 parts of filler material;
- about 0.2 to about 20 parts organofunctional silane, and about 10 to 250 parts of binding agent is employed.
A polyurethane foam comprising the reaction product of a reactive polyol, a polyisocyanate, an organofunctional silane having at least one hydrolyzable group and one ethylenically unsaturated group, and water;
- the relative amounts of materials in said foam being such that each 100 parts by weight of polyurethane foam, based on the reactive polyol and polyisocyanate, contains from about 0.05 to about 20 parts organofunctional silane.
Dependencies are inferred from the claim text.