Curing and adhesion of compositions containing salt of divalent metal of lactic acid – acid anhydride
– diepoxide and possibilities of their application as one-component adhesives
The effect of the weight ratio of components in the compositions obtained by mixing together at room temperature of a lactic acid salt (Mg, Ca or Zn), acid anhydride (maleic, hexafluorophthalic, succinic) and diepoxide (diglycidyl ester of hexahydrophthalic acid or diglycidyl ether of bisphenol A) on the rate of gelation at 150°C, stability at 50°C and shear tensile strength has been evaluated. It has been shown among other that the most rapid gelling systems are those containing Zn-salts, whereas those with Mg- or Ca-salts exhibit better adhesive strength properties (higher shear tensile strength). The most interesting as one-component adhesives are compositions filled with Aerosil and containing salts of lactic acid, succinic anhydride and diglycidyl ether of bisphenol A.
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