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Method for increasing the adhesion of polydiorganosiloxane-polycarbonate block copolymer interlayers to adjoining laminae and primer composition to accomplish same

  • US 4,571,280 A
  • Filed: 08/13/1984
  • Issued: 02/18/1986
  • Est. Priority Date: 08/13/1984
  • Status: Expired due to Term
First Claim
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1. A method for increasing the adhesion of a polydiorganosiloxane-polycarbonate block copolymer lamina or layer to a polycarbonate lamina or layer comprising the steps of:

  • (a) applying to at least one side of said polycarbonate lamina or layer a primer composition comprising a solution of a polydiorganosiloxane-polycarbonate block copolymer in an organic solvent comprising a C.sub.(3-6) alkanol mixed with either a C.sub.(1-6) halogenated alkyl or a C.sub.(6-9) halogenated phenyl;

    (b) evaporating said solvent;

    (c) laying-up said polydiorganosiloxane-polycarbonate block copolymer lamina or layer relative to said coated face of said polycarbonate lamina or layer; and

    (d) bonding said laid-up laminae or layers to produce a multi-ply composite or laminate.

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