Patent ID: 9441095
Filing Date: 2016-09-13
CPC Classification: B01J,B82Y,C01B,C01P,C08K,C09C,C09D,Y10T

Claim Text:
1. A method of producing hollow silica microparticles, comprising: preparing an organosol in which raw hollow silica microparticles are dispersed with a silica concentration of 1 to 70 W %; and adding a silane compound and an alkali catalyst to the organosol at a temperature in a range from 30° C. to 300° C. to react the silane compound with the raw hollow silica microparticles under a condition where a quantity of water against the raw hollow silica microparticles is in a range from 0.1 to 50 W %, wherein the hollow silica microparticles have the hollow silica microparticles lose a weight by 1.0 W % or more at a temperature in a range from 200° C. to 500° C. when measured by thermogravimetry (TG), a quantity of the silane compound added to the organosol is in a range from 1 to 50weight portions against 100 weight portions of the raw hollow silica microparticles, and a quantity of the alkali catalyst added to the organosol is in a range from 20 to 2,000 ppm against the organosol.