Patent ID: 6162836
Filing Date: 2000-12-19
Classification: C07C

Abstract:
A process for preparing an aqueous dispersion of a higher fatty acid zinc salt for use as a lubricant incorporated in a coating for the production of coated paper to prevent dusting or flouring or as a viscosity stabilizer for the coating, which consists essentially of adding a molten higher fatty acid to an aqueous dispersion of zinc oxide and reacting the higher fatty acid with the zinc oxide in the presence of a cationic surfactant in an amount of 2-15% by weight based on the higher fatty acid with stirring while the aqueous dispersion is maintained at a temperature that is higher than the melting point of the higher fatty acid used, thereby providing a 30-50% concentration aqueous dispersion of a higher fatty acid zinc salt having an average particle size of 1.0-2.0 .mu.m in a yield of 95-99% and the viscosity of said dispersion is 110 to 150 centipoise.