×

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

  • US 4,197,335 A
  • Filed: 11/13/1978
  • Issued: 04/08/1980
  • Est. Priority Date: 11/13/1978
  • Status: Expired due to Term
First Claim
Patent Images

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.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×