Patent ID: 9040094
Filing Date: 2015-05-26
Classification: A61K,A61Q,B05D

Abstract:
1. A process for producing a flaky particulate material comprising substrate particles having surfaces coated with a fatty acid metal salt, the process comprising the steps of: suspending the substrate particles in water, whereby a slurry is formed; adding an aqueous solution of a water-soluble metal salt to the slurry in an amount sufficient to provide a fatty acid metal salt on the substrate particles in an amount of 0.1 to 15% by mass of the flaky particulate material; adding an aqueous basic solution over a period of 30 minutes or more to basify the slurry; adding an aqueous solution of a water-soluble fatty acid salt drop-wise to the slurry for 30 minutes or more in an amount sufficient to provide a fatty acid metal salt on the substrate particles in an amount of 0.1 to 15% by mass of the flaky particulate material; and ageing the slurry for 30 minutes or more; whereby the flaky particulate material comprising substrate particles having surfaces coated with the fatty acid metal salt is provided, the fatty acid metal salt being present on the substrate particles in an amount of 0.1 to 15% by mass, the flaky particulate material having an average coefficient of friction of not more than 0.50 and a total light transmittance of not less than 85%.