Microporous resin

Claim 1

THE PROCESS OF MAKING A MICROPOROUS RESINOUS SOLID PRODUCT WHICH COMPRISES FORMING A MIXTURE OF AN ESTERIFICATION PRODUCT OF AN ETHYLENIC ALPHA, BETA-DICARBOXYLIC ACID WITH A GLYCOL, SAID ESTERIFICATION PRODUCT BEING AN ADVANCED LINEAR POLYESTER CONTAINING UNESTERIFIED CARBOXYL GROUPS AND HAVING AN ACID NUMBER OF FROM 5 TO 100 AND BEING SOLUBLE IN AND COPOLYMERIZABLE WITH THE LIQUID MONOMERIC UNSATURATED POLYMERIZABLE COMPOUND CONTAINING AN ETHYLENIC LINKAGE HEREINAFTER MENTIONED TO YIELD A SOLID RESINOUS MATERIAL, A LIQUID MONOMERIC UNSATURATED POLYMERIZABLE COMPOUND CONTAINING AN ETHYLENIC LINKAGE AND BEING WATER-IMMISCIBLE, AN ALKALI METAL HYDROXIDE, THE RELATIVE AMOUNTS OF SAID ESTERIFICATION PRODUCT AND SAID ALKALI METAL HYDROXIDE BEING SUCH THAT SAID MIXTURE HAS A PH OF FROM 5 TO 6.9, HYDROUS SILICA GEL, WATER, THE AMOUNT OF SILICA GEL BEING SUFFICIENT TO RETAIN ALL OF THE WATER PRESENT IN THE SYSTEM, AND A POLYMERIZATION CATALYST AND CURING SAID MIXTURE TO A SOLID FORM BY HEATING UNDER NON-EVAPORATIVE POLYMERIZATION CONDITIONS.