Maleic polyester compositions

Claim 1

A COMPOSITION SUITABLE FOR COATING AND IMPREGNATING APPLICATIONS COMPRISING AN AQUEOUS SOLUTION OF A HEAT-CONVERTIBLE REACTION PRODUCT OF A POLYHYDRIC ALCOHOL AND AN A,B-UNSATURATED DICARBOXYLIC ACID, SAID POLYHYDRIC ALCOHOL BEING SELECTED FROM THE GLASS CONSISTING OF POLYHYDRIC ALCOHOLS OF FROM 2 TO 6 HYDROXYL GROUPS PER MOLECULE AND MIXTURES THEREOF, SAID POLYHYDIC ALCOHOL CONTAINING NO FUNCTIONAL GROUPS OTHER THAN OH GROUPS, CONTAINING NO OXYGEN EXCEPT IN THE FORM OF OH GROUPS AND HAVING AN OH/C RATIO OF FROM 0.6 TO 1.0, SAID A,B-SATURATED DICARBOXYLIC ACID BEING SELECTED FROM THE CLASS CONSISTING OF MALEIC ACID AND MALEIC ANHYDRIDE, SAID REACTION PRODUCT BEING ONE HAVING AT LEAST HALF OF THE COOH GROUPS ORIGINALLY PRESENTED BY THE REACTANTS ESTERIFIED AS EVIDENCED BY THE ACID VALUE OF THE REACTION PRODUCT BUT AS THE SAME TIME HAVING AN ACID VALUE OF AT LEAST THE MINIMUM VALUE FOR THE PARTICULAR OH/COOH RATIO EMPLOYED AS DEFINED BY LINE AB OF THE FIGURE, SAID REACTION PRODUCT BEING SOLUBLE IN WATER WITHOUT THE AID OF ANY ALKALINE SOLUBILIZING AGENT, SAID COMPOSITION COMBINING THE PROPERTIES OF DILUTABILITY WITH WATER TO AT LEAST 15% CONCENTRATION OF THE REACTION PRODUCT IN WATER AND THE ABILITY TO PROVIDE INSOLUBLE, INFUSIBLE FILMS BY HEATCONVERSION.