Polyurethane foam laminates

Details Polyurethane foam laminates Polyurethane foam laminates

1994-04-12

1995-10-24

Hamilton, III, Thomas

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428286, 4283171, 4283177, 4283191, B32B 326, B32B 712, B32B 1710, B32B 2712

Patent

active

054608708

ABSTRACT:
A structure is disclosed comprising a layer of polyurethane foam bonded to at least one layer of another material, especially a layer of fibreglass matte, a layer of cellulosic material e.g. cardboard, and/or a layer of polyurethane foam. The layers are bonded together with an adhesive of polyethylene or polypropylene that has been grafted with an ethylenically unsaturated dicarboxylic acid or anhydride thereof, the adhesive containing at least 0.03% by weight of said acid or anhydride. The structure exhibits a temperature for heat-fail resistance in shear of at least 90.degree. C. In embodiments, the polyurethane foam is a rigid polyurethane foam, and the polyethylene and polypropylene have been grafted with fumaric acid, maleic acid or maleic anhydride. As an example, the structure is comprised of a layer of fibreglass matte, at least one layer of polyurethane foam and a layer of fibreglass matte, the layers being bonded together with the adhesive. The structure may be used as so-called headliners in automobiles.

REFERENCES:
patent: 4612155 (1986-09-01), Wong et al.
patent: 5300360 (1994-04-01), Kocsis et al.
patent: 5342884 (1994-08-01), Tabor et al.

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