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Catalysts for electroless deposition of metals on comparatively low-temperature polyolefin and polyester substrates

  • US 4,006,047 A
  • Filed: 11/08/1974
  • Issued: 02/01/1977
  • Est. Priority Date: 07/22/1974
  • Status: Expired due to Term
First Claim
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1. A method for the deposition of a copper, nickel cobalt, or gold as metal onto an inert substrate for said metal said substrate being selected from the group consisting of polyester, polyamides, polyvinylchloride, polyethylene, polypropylene, copolymers of either polyolefin, and poly (1a) olefins in the homologous series of the polyethylene and polypropylene, from an electroless bath containing said metal, said method comprising the steps of:

  • degreasing said substrate;

    applying to said substrate a thin film of a thermally decomposable complex of palladium or platinum having the formulae
    
    
    space="preserve" listing-type="equation">LmPdXn, or
    
    
    space="preserve" listing-type="equation">LmPtXnwhereinL is a ligand or an unsaturated organic group;

    Pd or Pt is palladium or platinum metal;

    X is a halide, an alkyl group or a bidentate ligand; and

    m is from 1 to 4 and n is from 0 to 3exposing said substrate to which said complex has been applied to heat at a temperature of less than a temperature at which the substrate loses its dimensional stability, to effect decomposition of said complex and to create a residue on said substrate catalytic to a copper, nickel, cobalt or gold metal in an electroless bath solution; and

    depositing a copper, nickel, cobalt or gold metal from said electroless bath on said substrate in an area rendered catalytic by decomposition of said complex.

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