Hydroxy copolymers prepared in carboxylic acids

Claim 1

A PROCESS FOR THE PREPARATION OF A HYDROXY COPOLYMER SOLUTION DEVOID OF SOLVENT BOILING BELOW 150* C. AND CAPABLE OF BEING READILY CROSS-LINKED WHICH COMPRISES POLYMERIZING, AT A TEMPERATURE OF FROM 60*C. TO ABOUT 150*C., A SOLUTION COMPRISING (A) AN UNSATURATED HYDROXY MONOMER SELECTED FROM THE GROUP CONSISTING OF MONOETHYLENICALLY UNSATURATED ALCOHOLS, HYDROXYALKYL VINYL SULFIDES AND HYDROXYALKYL ESTERS OF A,B-ETHYLENICALLY UNSATURATED CARBOXYLIC ACIDS OF NOT OVER FOUR CARBON ATOMS, THE ALKYL GROUPS OF SAID SULFIDES AND ESTERS HAVING NOT MORE THAN TEN CABON ATOMS, (B) A DIFFERENT MONOETHYLENICALLY UNSATURATED MONOMER COPOLYMERIZABLE WITH SAID (A), AND (C) AS THE SOLE POLYMERIZATION SOLVENT, A CARBOXYLIC ACID, SAID (C) (1) BEING A SOLVENT FOR AND NON-REACTIVE WITH SAID (A), SAID (B) AND SAID HYDROXY COPOLYMER UNDER THE POLYMERIZATION CONDITIONS USED, (2) BEING PRESENT IN AN AMOUNT SUFFICIENT TO DISSOLVE SAID (A), SAID (B) AND SAID HYDROXY COPOLYMER AT THE POLYMERIZATION TEMPERATURE, (3) BEING SATURATED OR CONTAINING UNSATURATION WHICH IS NON-REACTIVE UNDER THE POLYMERIZATION CONDITIONS USED, (4) HAVING A BOILING POINT OF AT LEAST 150*C., (5) HAVING A VISCOSITY NOT EXCEEDING 130 CENTIPOISES AT THE POLYMERIZATION TEMPERATURE, AND (6) BEING CAPABLE OF ENTERING THE CURING REACTION WHEN SAID HYDROXY COPOLYMER IS CURED.