Organosiloxanes cosmetic and sunscreen agents

Details Organosiloxanes cosmetic and sunscreen agents Organosiloxanes cosmetic and sunscreen agents

C - Chemistry, Metallurgy

07

F

402/16, 167/314,

C07F 7/18 (2006.01) A61K 7/44 (1985.01)

Patent

CA 1255690

Abstract of the Disclosure ORGANOSILOXANES AND PREPARATION THEREOF Process for preparing organosiloxanes having in the molecule at least one unit of the general formula Image in which R is C1-4 alkyl or a phenyl group, R' represents an aliphatic or aromatic group composed of carbon, hydrogen and optionally oxygen and having a valency of n+1, Y represents OH or alkoxy, a is 0, 1 or 2, b is 0 or 1 and n is 1, 2 or 3. The process comprises reacting an organosiloxane having silicon- bonded hydroxyalkyl or hydroxyaryl substituents with the appro- priate acid chloride. The organosiloxanes absorb ultra violet radiation and are useful as sunscreen agents. Also claimed are certain novel siloxanes which can be obtained by the said process.

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