A raw material composition for ceramic materials and process for its preparation.

摘要

The raw material composition for the manufacture of tiles comprises: a.- From 50% to 80% of mineral clay. b.- From 0,02% to 2,75% by weight of water soluble acrylic polymer selected from the group consisting of (i) - (iii): i.- Potassium, sodium, or ammonium polyacrylate having molecular weight from 2000 to 30000. ii.- Potassium, sodium, or ammonium salt of copolymer of acrylic acid and methacrylic acid having molecular weight from 8000 to 30000. iii.- Potassium, sodium, or ammonium salt of copolymer of acrylic acid and maleic acid having molecular weight from 5000 to 25000. c.- From 0,01% to 2,25% by weight of inorganic alkali compound. d.- From 20% to 50% of water. By means of the new raw material composition a better green and cooked resistence of the tiles is obtained. <IMAGE>