CARBOXYMETHYL CELLULOSE COMPOSITION EXCELLENT IN CALCIUM RESISTANCE

摘要

PURPOSE:To obtain a carboxymethyl cellulose composition excellent in calcium resistance. CONSTITUTION:This carboxymethyl cellulose composition is composed of carboxymethyl cellulose and a cerium compound and more specifically has a viscosity (eta1) of its 1% solution (A) containing water as a solvent and a viscosity (eta2) after adding 3wt.% calcium chloride to the solution (A) satisfying a relational expression (eta2/eta1)=0.8-1.5.