US 4,232,088 A · Polycarbonate articles coated with an adherent, durable organopolysiloxane coating and process for producing same

Abstract

A coated polycarbonate article comprising a polycarbonate substrate having (i) a primer layer containing a UV cured reaction product of (a) a polyfunctional acrylic ester monomer, (b) an organic silicon compound represented by the formula R.sup.4.sub.c SiX.sub.4-c wherein R.sup.4 is an organic group containing olefinic unsaturation, X is an alkoxy, acyloxy, and aryloxy group, and c is an integer of from 1 to 3, and (c) an acrylate modified polymer; and (ii) a thermoset organopolysiloxane coating on said UV cured primer layer. A process for producing a coated polycarbonate article comprising (i) priming a polycarbonate substrate with a UV curable primer composition containing (a) a polyfunctional acrylic acid ester monomer, (b) an organic silicon compound represented by the formula R.sup.4.sub.c SiX.sub.4-c, wherein R.sup.4, X and c are as defined above, (c) an acrylate modified polymer, and (d) a UV photoinitiator; (ii) UV curing said primer composition; (iii) applying an organopolysiloxane coating composition to the primed substrate; and (iv) curing the organopolysiloxane.

Claims29

Dependent claims

A polycarbonate article having improved scratch, mar, abrasion and chemical solvent resistance comprising a polycarbonate substrate having deposited on at least one surface thereof:

(i) an ultraviolet radiation cured primer layer which contains the photoreaction products of (a) at least one polyfunctional acrylic acid ester monomer, (b) at least one acrylate modified polymer selected from the group consisting of acrylated epoxies, acrylated urethanes, acrylated alkyl urethanes, acrylated polycaprolactones, acrylated unsaturated acid modified drying oils, acrylated polyesters, and acrylated polyethers, and (c) at least one organic silicon compound represented by the general formula R.sup.4.sub.c SiX.sub.4-c wherein c is an integer from 1 to 3 inclusive, X is an alkoxy, acyloxy, or aryloxy radical, and R.sup.4 represents a radical selected from ##STR45## wherein R.sup.5 is a divalent saturated aliphatic hydrocarbon radical;
and (ii) having deposited on said primer layer a cured top coat containing a thermoset organopolysiloxane.

A process for producing a uniformly and tenaciously adhered scratch resistant, mar resistant, abrasion resistant, and organic solvent resistant thermoset organopolysiloxane containing coating on at least one surface of a polycarbonate substrate which comprises:

(i) applying onto at least one surface of said polycarbonate substrate an ultraviolet light curable primer composition containing (a) at least one polyfunctional acrylic acid ester monomer;
(b) at least one organic silicon compound containing at least one organic group having olefinic unsaturation;
(c) at least one acrylate modified polymer selected from the group consisting of acrylated urethanes, acrylated alkyl urethanes, acrylated polycaprolactones, acrylated unsaturated acid modified drying oils, acrylated polyesters, and acrylated polyethers;
and (d) a photoinitiator;
(ii) curing said primer composition by means of ultraviolet light;
(iii) applying an organopolysiloxane top coating composition containing a further-curable organopolysiloxane onto said cured primer;
and (iv) curing said further-curable organopolysiloxane to a thermoset condition and thereby producing said coating.

4 more elements

Dependencies are inferred from the claim text.

Polycarbonate articles coated with an adherent, durable organopolysiloxane coating and process for producing same

Life of this patent

Polycarbonate articles coated with an adherent, durable organopolysiloxane coating and process for producing same

Life of this patent

Abstract

Claims29