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Latent, heat-curable epoxy resin compositions containing metal carboxylate curing systems

  • US 5,212,261 A
  • Filed: 12/17/1990
  • Issued: 05/18/1993
  • Est. Priority Date: 12/17/1990
  • Status: Expired due to Fees
First Claim
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1. A heat-curable epoxy resin composition free of cure-effective amounts of an amine, carboxylic anhydride, or carboxylic acid in the acid form, comprising:

  • (a) at least one polyepoxide;

    (b) from about 0.1 to about 50 parts of a metal carboxylate salt curing agent per hundred parts by weight of total epoxy resin, said metal carboxylate salt being selected from a Group IA or Group IIA metal and being derived from a carboxylic acid containing from 1 to 4 carboxyl groups, wherein said metal carboxylate salt is substantially soluble in said epoxy resin composition at a cure temperature of above about 100°

    C.; and

    (c) from about 1 to about 100 parts of a cure modifier per hundred parts by weight of total epoxy resin, said cure modifier containing polar functionality, being soluble in said epoxy resin composition at said cure temperature and having sufficient solvating strength as to increase the solubility of said metal carboxylate salt in said epoxy resin to curing effective levels at said cure temperature.

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