Process for making a polyurethane foam sheet and composites incl

Details Process for making a polyurethane foam sheet and composites incl Process for making a polyurethane foam sheet and composites incl

1974-08-22

1976-11-02

Van Balen, William J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

260 292TN, 427244, 427407C, 428246, 428261, 428262, 428286, 428290, 428310, 428315, 428424, 428425, B32B 326

Patent

active

039898695

ABSTRACT:
A process is provided for making a polyurethane mechanical foam adapted to be used as an interlayer between a plastic surface layer and a textile, the process involving frothing a non-ionic aqueous dispersion free from emulsifying agents of a polyurethane having a particle size of less than 1 micron, said dispersion containing more than 45% by weight polyurethane and a thickening agent whereby its viscosity of the dispersion is from about 10 to about 70 seconds with a Ford Cup having a 4 mm orifice to form a foamable mixture, spreading the frothed dispersion into a foamed film, and drying the resulting product.

REFERENCES:
patent: 3537947 (1970-11-01), Brazdzionis
patent: 3741854 (1973-06-01), De Goria
patent: 3772224 (1973-11-01), Marlin et al.

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