Coating the back of floor coverings with polyurethanes

Details Coating the back of floor coverings with polyurethanes Coating the back of floor coverings with polyurethanes

A - Human Necessities

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117/161

A47G 27/02 (2006.01) B29C 44/32 (2006.01) C08J 9/04 (2006.01) D06N 7/00 (2006.01)

Patent

CA 1039594

COATING THE BACK OF FLOOR COVERINGS WITH POLYURETHANES Abstract of the Disclosure The instant invention relates to a process for coating the back of textile floor coverings, e.g. carpets, with polyurethane foams wherein it is possible to obtain particularly firm fixing of the nap and improved anchorage of the textile filaments. The process broadly comprises: a) applying to the back of a textile floor covering a first coat consisting essentially of a reaction mixture of a polyol and a large excess of polyisocyanate, b) before said first coat has been hardened, applying thereto a reactive foamable mixture of substantially equivalent quan- tities of polyol and polyisocyanate, and c) thereafter hardening the resultant product.

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