HYDRAULIC CEMENT AND PORTLAND CEMENT COMPOSITION, PROCESS FOR CRUSHING HYDRAULIC CEMENT, PROCESS FOR PRODUCING AMINE SALTS AND AMINE SALTS OBTAINED

摘要

Hydraulic cement compositions comprise hydraulic cement and an amine salt of a carboxylic acid containing an aromatic group. The composition is made by grinding the cement with the amine salt as a grinding aid that enhances the efficiency of the grinding operation and inhibits pack-set tendencies in the composition. Preferred amine salts for use in the compositions are novel reaction products and are salts obtained from a mixture of aromatic carboxylic acids obtained as a low cost by-product in the commercial production of phthalic anhydride with an amine, which may itself be a commercial by-product from the synthesis of ethanolamine.