Patent ID: 7144838
Filing Date: 2006-12-05
Classification: C01P,C09C

Abstract:
1. A process for producing titanium dioxide pigment, which comprises a step of coating a hydrolysis product of an alkylsilane compound represented by the following formula (1): (where R is an alkyl group having 5 or less carbon atoms, R′ is a hydrolyzable group, and n is an integer of 1 to 3, m is an integer of 0 to 2, and n+m≦3) by dry processing on surfaces of particles of titanium dioxide pigment whererin the particles of the titanium dioxide pigment is obtained by pulverization of titanium dioxide pigment in a fluid energy pulverizer; and wherein the fluid energy pulverizer uses a gas as a pulverizing medium and the hydrolysis product of the alkysilane compound represented by the formula (1) is added to the pulverizer during the pulverization of the titanium dioxide pigment.