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Thermosetting coating compositions for the sealing of fiber reinforced plastics

  • US 4,526,939 A
  • Filed: 07/18/1983
  • Issued: 07/02/1985
  • Est. Priority Date: 07/18/1983
  • Status: Expired due to Fees
First Claim
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1. A thermosetting organic solvent solution coating composition containing a mixture of resins comprising (1) from 30% to 70% of one or more hydroxy functional resins having a number average molecular weight of at least about 700, a Gardner bubble viscosity less than about Z4 measured in methyl ethyl ketone at 90% solids at 25°

  • C., and at least 5% of the hydroxy groups thereof being primary hydroxy groups, (2) from 10% to 70% of low molecular weight epoxy ester made by esterifying one or more resinous polyepoxides having a 1,2-epoxy equivalency of at least 1.2 with an approximately stoichiometric proportion of monocarboxylic fatty acid to provide an essentially epoxy-free ester having a Gardner bubble viscosity less than Z4 at 75% solids in xylol at 25°

    C., and (3) the balance of the mixture, but not less than 15% thereof, being a curing agent having a plurality of groups reactive with the hydroxy groups in the hydroxy resin and in the epoxy ester, said composition having a total solids content of at least 35%.

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