Polyurethane coated safety glass

Details Polyurethane coated safety glass Polyurethane coated safety glass

1974-11-12

1976-09-07

Ansher, Harold

Stock material or miscellaneous articles

Composite

Of polyamidoester

428437, 260 775A, 260 775AP, 427165, B32B 2740

Patent

active

039795489

ABSTRACT:
A scratch-resistant polyurethane coating for safety windows is made by curing a sheet of a liquid composition comprising (1) a polyglycol ether resulting from the condensation 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.

REFERENCES:
patent: 3657057 (1972-04-01), Shorr et al.
patent: 3671370 (1972-06-01), Littell, Jr.
patent: 3791914 (1974-02-01), Ammons et al.
patent: 3804810 (1974-04-01), Fryd
patent: 3806486 (1974-04-01), Endriss et al.

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