Patent ID: 6753399
Filing Date: 2004-06-22
Classification: A61K,A61Q,C08G

Abstract:
A method for the preparation of globular particles of a silicone resin which comprises the steps of:(a) preparing an aqueous alkaline solution having a pH value in the range from 10.5 to 12.5 by the addition of a basic compound selected from the group consisting of ammonia and water-soluble amine compounds to water; (b) adding a water-soluble magnesium salt to the aqueous alkaline solution, in a concentration of the metallic ions in the range from 1Ã—10âˆ’5 to 1Ã—10âˆ’2 mole/liter; and (c) adding, to the aqueous alkaline solution, an organotrialkoxy silane compound or a partial hydrolysis condensation product thereof as the starting material, in an amount in the range from 5 to 100 parts by weight per 100 parts by weight of the aqueous alkaline solution within a time from 30 minutes to 100 hours, under agitation to effect hydrolysis condensation reaction of the starting material.