Epoxy alkyl condensates with aromatic hydrocarbon polycarboxylic acids and process of making same

Claim 1

A SUBSTANTIALLY WATER-INSOLUBLE COMPOSITION CONTAINING A MIXTURE OF MONOMERIC AND LOWER MOLECULAR WEIGHT POLYMERIC EPOXY ESTER COMPOUNDS FORMED BY CONDENSING AN ALKALI METAL SALT OF A BENZENE DICARBOXYLIC ACID HALF-ESTER WITH A LOWER ALKANEDIOL, SAID BENZENE DICARBOXYLIC ACID BEING SELECTED FROM THE GROUP CONSISTING OF ORTHOPTHATHALIC AND ISOPHTHALIC ACIDS, WITH A VIC-EPOXY LOWER ALKYL HALIDE, SAID EPOXY ESTER COMPOUNDS CONTAINING AT LEAST ONE EPOXIDE GROUP AND NOT MORE THAN TWO EPOXIDE GROUPS PER INDIVIDUAL MOLECULE, SAID EPOXY RADICAL LINKED TO SAID HALF-ESTER ACID RADICAL THROUGH A LINKAGE SELECTED FROM THE GROUP CONSISTING OF (1) ESTER LINKAGES AND (2) ETHER LINKAGES TO A GLYCERINE RADICAL LINKED TO SAID HALF-ESTER ACID RADICAL THROUGH AN ESTER LINKAGE, SAID COMPOSITION HAVING AN AVERAGE EPOXIDE-OXYGEN CONTENT BETWEEN 2.3% AND 7.5%, AN AVERAGE MOLECULAR WEIGHT BETWEEN 300 AND 500, AND AVERAGE HYDROXYL NUMBER BETWEEN 270 AND 350, AND AN AVERAGE SAPONIFICATION NUMBER BETWEEN 350 AND 450, SAID COMPOSITION BEING HARDENABLE BY EPOXY RESIN HARDENERS.