Process for preparing polyurethane-backed substrate

Details Process for preparing polyurethane-backed substrate Process for preparing polyurethane-backed substrate

1989-06-29

1990-04-03

Van Balen, William J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

427244, 427373, 428 95, 428246, 428284, 4283191, 4283193, 4284233, B32B 326, B05D 500

Patent

active

049139584

ABSTRACT:
Substrates having successive layers of a cellular polyurethane and a noncellular polyurethane are prepared using certain siloxane-polyether block copolymers in the noncellular polyurethane formulation. The use of the block copolymer reduces or eliminates the formation of a bubble line at the interface of the polyurethane layers, thereby improving physical and cosmetic properties of the carpet.

REFERENCES:
patent: 4483894 (1984-11-01), Porter et al.

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