The aqueous solution of the hypoviscosity carboxymethylcellulose sodium

摘要

PURPOSE: To easily shorten the time needed for dissolving carboxymethyl- cellulose sodium salt (CMC-Na) in water and prevent the solution from reducing its viscosity after the dissolution by dissolving CMC-Na in an aqueous solution of a low-viscosity CMC-Na. ;CONSTITUTION: Preliminarily, (A) an aqueous 2% CMC-Na solution of a low viscosity, having ≤5mpa.s viscosity at 25°C, preferably 0.1-2%, particularly 0.5-1.0% concentration is prepared, then (B) CMC-Na, preferably whose 1% aqueous solution on the anhydrous base gives 5-20,000mpa.s, is dissolved in the preliminarily prepared solution. The concentration of CMC-Na as a component B in the objective solution is preferably 0.2-20%.;COPYRIGHT: (C)1996,JPO