Abrasion resistant polyurethane coatings for rigid plastics

Details Abrasion resistant polyurethane coatings for rigid plastics Abrasion resistant polyurethane coatings for rigid plastics

1986-11-24

1988-03-15

Ives, P. C.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428412, 4284233, 4284237, 4284231, 4284244, 2641711, 264171, C08G 1864, B32B 2736, B32B 2740

Patent

active

047312890

ABSTRACT:
A method is disclosed for casting a colorless, single phase liquid reaction mixture comprising an aliphatic diisocyanate and a polyester polyol against a rigid transparent plastic and curing at a sufficiently rapid rate at temperatures of about 175.degree. to 275.degree. F. (about 79.degree. to 135.degree. C.) to form a relatively soft, resilient, abrasion resistant branched polyurethane coating without warpage or deterioration of the rigid plastic. The polyesterurethane coatings disclosed are characterized by durometer values at 70.degree. F. between Shore A 50 and Shore D 80, and molecular weights between branch points between 1000 and 13,000.

REFERENCES:
patent: 4010311 (1977-03-01), Lewis et al.
patent: 4035548 (1977-07-01), Chang et al.
patent: 4045269 (1977-08-01), Voss et al.
patent: 4079160 (1978-03-01), Philipson
patent: 4174240 (1979-11-01), Muller et al.
patent: 4355077 (1982-10-01), Chevreux et al.

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