Method for coating a polycarbonate article with silica filled or

Details Method for coating a polycarbonate article with silica filled or Method for coating a polycarbonate article with silica filled or

1978-11-13

1980-06-10

Hoffman, James R.

Coating processes

Optical element produced

427163, 427164, 427379, 427387, B05D 138, B05D 704, B05D 302

Patent

active

042073570

ABSTRACT:
A process for providing a durable and tenaciously adhered scratch, mar, abrasion, and chemical solvent resistant colloidal silica filled organopolysiloxane coating on a polycarbonate substrate. The process includes (i) applying a priming composition comprised of an emulsion of a thermosettable acrylic polymer and a hydroxy ether to a polycarbonate substrate; (ii) curing the thermosettable acrylic polymer thereby forming a primer layer on said substrate; (iii) applying onto the primed substrate a top coat composition containing a colloidal silica filled further curable organopolysiloxane; and, (iv) curing the silica filled organopolysiloxane.

REFERENCES:
patent: 3582398 (1971-06-01), Ringler
patent: 3707397 (1972-12-01), Gagnon
patent: 3968305 (1976-07-01), Oshima et al.
patent: 3968309 (1976-07-01), Matsuo et al.
patent: 3978178 (1976-08-01), Oshima et al.
patent: 3986997 (1976-10-01), Clark
patent: 4027073 (1977-05-01), Clark
patent: 4041120 (1977-08-01), Oshima et al.
patent: 4045602 (1977-08-01), Sommer et al.

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