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Curable composition for electrical and electronic components

  • US 5,134,175 A
  • Filed: 11/29/1990
  • Issued: 07/28/1992
  • Est. Priority Date: 12/16/1987
  • Status: Expired due to Term
First Claim
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1. Actinic radiation curable composition suitable for use in coating electronic components and as a printing ink comprising:

  • (a) a prepolymer selected from the group consisting of monofunctional vinyl resins and multifunctional vinyl resins;

    (b) a monomer selected from the group consisting of monofunctional vinyl monomers and multifunctional vinyl monomers;

    (c) a photoinitiator;

    (d) at least one filler; and

    (e) at least one surface active agent having a molecular weight greater than about 227;

    wherein one of the surface active agent or the filler has an overall pH greater than or equal to 7 and the other of the surface active agent or the filler has an overall pH less than or equal to 7 whereby the overall pH of the surface active agent(s) is less than 7 when the overall pH of the filler(s) is greater than 7, such that dispersion of the filler in the composition is enhanced and wherein the volume % of filler is at least 60 based on the competition of a prepolymer, a monomer, a photoinitiator, a surface active and a filler.

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