Polyurethane plastic coating layer

Details Polyurethane plastic coating layer Polyurethane plastic coating layer

C - Chemistry, Metallurgy

08

G

18/1048, 154/111

C08G 18/48 (2006.01) B32B 17/10 (2006.01) C03C 27/12 (2006.01) C08G 18/78 (2006.01)

Patent

CA 1047685

ABSTRACT A scratch-resistant polyurethane coating for safety windows 18 made by curing a sheet of a liquid composition comprising (1) a polyglycol ether resulting from the con- densation of propylene oxide with trimethylolpropane and containing 10.5%-12.0% free hydroxyls and (2) a biuret of 1,6-hexamethylene-diisocyanate, having 21-22% isocyanate groups, the weight ratio of said biuret to said polyglycol ether being about 0.9-1.1.

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