Epoxide conversion of unsaturated acids

Claim 1

THE PROCESS OF FORMING AN INSOLUBLE, INFUSIBLE, FLEXIBLE TACK FREE PROTECTIVE FILM ON A BASE WHICH COMPRISES APPLYING TO A BASE A MISCIBLE MIXTURE COMPRISING AN ALIPHATIC ETHYLENICALLY UNSATURATED MONOCARBOXYLIC ACID CONTAINING AT LEAST SIX CARBON ATOMS IN A CARBON TO CARBON UNSATURATED ALIPHATIC CHAIN AND A POLYEPOXIDE HAVING AN AVERAGE OF MORE THAN ABOUT 2 1/2 OXIRANE GROUPS PER MOLECULE IN A RATIO WHEREBY THE NUMBER OF OXIRANE GROUPS IN SAID MIXTURE ARE AT LEAST AS GREAT AS THE NUMBER OF CARBOXYL GROUPS PROVIDED BY SAID ACID IN SAID MIXTURE SAID POLYEPOXIDE BEING SELECTED FROM THE GROUP CONSISTING OF EPOXIDIZED POLYESTERS OF TETRAHYDROPHTHALIC ACID AND SATURATED ALIPHATIC GLYCOLS, AND EPOXIDIZED ESTERS OF ETHYLENICALLY UNSATURATED VEGETABLE OIL ACIDS, THE OXIRANE GROUPS OF SAID ESTER BEING IN THE ACID MOIETY, SAID MONOCARBOXYLIC ACID AND POLYEPOXIDE BEING MISCIBLE AT BOTH ROOM AND ESTERIFICATION TEMPERATURES; AND HEATING SAID FILM ON SAID BASE TO A TEMPERATURE FROM ABOUT 100*C. TO ABOUT 225*C. WHEREBY SAID ACID IS SIMULTANEOUSLY ESERIFIED WITH SAID POLYEPOXIDE AND POLYMERIZED THROUGH ITS UNSATURATED ALIPHATIC CHAIN TO FORM SAID FILM ON SAID BASE, SAID FILM CONSISTING ESSENTIALLY OF THE REACTION PRODUCT OF SAID ALIPHATIC ETHYLENICALLY UNSATURATED MONOCARBOXYLIC ACID AND SAID POLYEPOXIDE.