Curable water-miscible copolymer consisting of water-soluble polyester and glycol diacrylate

Claim 1

A COMPOSITION COMPRISING THE REACTION PRODUCT OF RELATIVE PROPORTIONS OF REACTANTS CONSISTING OF (1) ABOUT 100 PARTS BY WEIGHT ON A WATER-FREE BASIS OF A WATERSOLUBLE POLYESTER HAVING AN ACID NUMBER BETWEEN ABOUT 50 AND 75, AND (2) ABOUT 5-30 PARTS BY WEIGHT OF A WATER-MISCIBLE GLYCOL DIACRYLATE WHICH IS THE REACTION PRODUCT OF A WATER-SOLUBLE GLYCOL SELECTED FROM THE GROUP CONSISTING OF POLYGLCOLS CONTAINING AT LEAST ONE ETHER LINKAGE AND MONOGLYCOLS CONTAINING NOT MORE THAN 4 CARBON ATOMS, AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID AND METHACRYLIC ACID SAID POLYESTER BEING THE REACTION PRODUCT OF (A) A DICARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF FUMARIC ACID, MALEIC ACID ITACONIC ACID CITRACONIC ACID CHLORO MALEIC ACID, AND THE ANHYDRIDES THEREOF (B) A POLYGLYCOL CONTAINING AT LEAST THREE ETHER LINKAGES IN AN AMOUNT OF ABOUT 0.5-0.7 EQUIVALENT PER EQUIVALENT OF SAID DICARBOXYLIC ACID, AND (C) A POLYHDROXY ALCOHOL SELECTED FROM THE GROUP CONSISTING OF PENTAERYTHRITOL GLYCERIN, AND SORBITOL IN AN AMOUNT OF ABOUT 0.5-0.7 EQUIVALENT PER EQUIVALENT OF SAID DICARBOXYLIC ACID.