Method of providing a polycarbonate article with a uniform and durable organopolysiloxane coating

Claim 1

A method of producing a polycarbonate article having improved mar, abrasion, scratch and chemical solvent resistance comprising the steps of: (i) applying onto a polycarbonate substrate a primer emulsion composition containing, in percent by weight, (a) from about 1 to about 10 percent of a thermosettable acrylic polymer, (b) from about 20 to about 45% of a hydroxy ether, and (c) from about 45 to about 79 percent of water; (ii) evaporating off a substantial portion of said water and hydroxy ether from said primer emulsion composition to form a substantially solid layer comprised of thermosettable acrylic polymer; (iii) thermally curing said thermosettable acrylic polymer to form a thermoset acrylic primer layer; (iv) applying onto said cured primer layer a top coat composition comprised of a further curable organopolysiloxane; (v) evaporating off a substantial portion of any solvents present in said top coat composition thereby forming a layer comprised of further curable organopolysiloxane; and (vi) curing said further curable organopolysiloxane thereby forming a cured organopolysiloxane top coat.

Claim 2

A method of producing a polycarbonate article having improved mar, abrasion, scratch and chemical solvent resistance comprising the steps of: (i) applying onto a polycarbonate substrate a primer emulsion composition containing, in percent by weight, (a) from about 1 to about 10 percent of a thermosettable acrylic polymer, (b) from about 20 to about 45% of a hydroxy ether, and (c) from about 45 to about 79 percent of water; (ii) evaporating off a substantial portion of said water and hydroxy ether from said primer emulsion composition to form a substantially solid layer comprised of thermosettable acrylic polymer; (iii) thermally curing said thermosettable acrylic polymer to form a thermoset acrylic primer layer; (iv) applying onto said cured primer layer a top coat composition comprised of a further curable organopolysiloxane; (v) evaporating off a substantial portion of any solvents present in said top coat composition thereby forming a layer comprised of further curable organopolysiloxane; and (vi) curing said further curable organopolysiloxane thereby forming a cured organopolysiloxane top coat.

Claim 9

A method for providing a uniform and durably adhered mar, scratch, abrasion and chemical solvent resistant organopolysiloxane coating on a polycarbonate article which comprises: (i) applying onto the surface of a polycarbonate substrate a primer emulsion composition containing, in percent by weight, (a) from about 1 to about 10 percent of a thermosettable acrylic polymer, (b) from about 20 to about 45 percent of a hydroxy ether, and (c) from about 45 to about 79 percent of water; (ii) evaporating off a substantial portion of said water and hydroxy ether from said primer emulsion composition to form a layer comprised of a thermosettable acrylic; (iii) thermally curing said thermosettable acrylic to form a thermoset acrylic primer layer; (iv) applying onto said cured primer layer a top coat composition containing a further curable organopolysiloxane; (v) evaporating off a substantial portion of any solvents present in said top coat composition thereby forming a layer comprised of further curable organopolysiloxane; and (vi) further curing said organopolysiloxane thereby forming a cured organopolysiloxane coating.

Claim 10

A method for providing a uniform and durably adhered mar, scratch, abrasion and chemical solvent resistant organopolysiloxane coating on a polycarbonate article which comprises: (i) applying onto the surface of a polycarbonate substrate a primer emulsion composition containing, in percent by weight, (a) from about 1 to about 10 percent of a thermosettable acrylic polymer, (b) from about 20 to about 45 percent of a hydroxy ether, and (c) from about 45 to about 79 percent of water; (ii) evaporating off a substantial portion of said water and hydroxy ether from said primer emulsion composition to form a layer comprised of a thermosettable acrylic; (iii) thermally curing said thermosettable acrylic to form a thermoset acrylic primer layer; (iv) applying onto said cured primer layer a top coat composition containing a further curable organopolysiloxane; (v) evaporating off a substantial portion of any solvents present in said top coat composition thereby forming a layer comprised of further curable organopolysiloxane; and (vi) further curing said organopolysiloxane thereby forming a cured organopolysiloxane coating.