Material simulating ceramic wall tile

Claim 1

PLASTIC WALL TILE WHICH CLOSELY SIMULATES CERAMIC WALL TILE AND WHICH RESULTS FROM SETTING BY POLYMERIZATION OF AN INTIMATE MIXTURE OF A POLYMERIZABLE MIX CONSISTING OF AN ESTER RESULTING FROM THE REACTION OF ETHYLENE GLYCOL WITH APPROXIMATELY EQUAL MOLAR PROPORTIONS OF MALEIC ANHYDRIDE AND TETRACHLOROPHTHALIC ANHYDRIDE, THERE BEING PRESENT IN THE MIXTURE WHICH IS ESTERIFIED SUBSTANTIALLY ONE ACID EQUIVALENT PRESENTED BY SAID ANHYDRIDES PER HYDROXYL GROUP PRESENTED BY SAID GLYCOL, THE ESTERIFICATION BEING CONTINUED TO AN ADVANCED STAGE SUCH THAT THE RESULTING ESTERIFICATION PRODUCT HAS AN ACID NUMBER IN THE RANGE OF FROM 25 TO 50, AND STYRENE, THE RELATIVE PROPORTIONS OF SAID ESTER AND SAID STYRENE RANGING FROM 50 TO 85% OF SAID ESTER AND CORRESPONDINGLY FROM 50 TO 15% OF SAID STYRENE, THESE PROPORTIONS BEING BY WEIGHT BASED ON THE SUM OF THE WEIGHTS OF SAID ESTER AND SAID STYRENE, WITH CALCIUM CARBONATE HAVING A PARTICLE SIZE SUCH THAT AT LEAST 90% DOES NOT EXCEED 35 MICRONS, THE RELATIVE PROPORTIONS OF SAID CALCIUM CARBONATE AND SAID POLYMERIZABLE MIX RANGING FROM 30 TO 60% BY WEIGHT OF SAID CALCIUM CARBONATE AND CORRESPONDINGLY FROM 70 TO 40% BY WEIGHT OF SAID POLYMERIZABLE MIX, AND A PEROXY POLYMERIZATION CATALST.