Method of coating with low temperature curing corrosion resistan

Details Method of coating with low temperature curing corrosion resistan Method of coating with low temperature curing corrosion resistan

1975-07-24

1976-11-09

Gwinnell, Harry J.

Metal treatment

Compositions

Heat treating

148 62, 427 27, 427379, 427388R, 428457, 428461, 428463, C23F 710, B05D 714

Patent

active

039909212

ABSTRACT:
A low temperature curing polyurethane coating system is provided which enables the deposition of adherent corrosion resistant coatings having a desirable balance of hardness and flexibility by using a mixture of a solution copolymer of from 55-85% styrene with the balance of the copolymer consisting essentially of monoethylenically unsaturated hydroxy functional monomer, the copolymer being in solution in inert organic solvent, and an organic polyisocyanate. The polyisocyanate is kept separate from the copolymer solution until the desired liquid mixture is formed and used. Steel substrates coated with this coating system are cured without exceeding 250.degree. F.

REFERENCES:
patent: 3245941 (1966-04-01), Mayer et al.
patent: 3286757 (1966-11-01), Thomas
patent: 3376252 (1968-04-01), Peiser et al.
patent: 3893977 (1975-07-01), Wingler
patent: 3919351 (1975-11-01), Chang et al.
patent: 3925582 (1975-12-01), Sample et al.

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