Patent ID: 7943720
Filing Date: 2011-05-17
Classification: A61K,A61Q,C07F,C08G,C08L

Abstract:
1. A method of manufacturing a purified product of a liquid medium-chain, alkyl-modified polydimethylsiloxane comprising the steps of: [A] synthesizing a liquid medium-chain alkyl-modified polydimethylsiloxane represented by general formula (2) by carrying out a hydrosilylation reaction between a hydrosilyl-containing polydimethylsiloxane of general formula (1) and an α-olefin with 4 to 12 carbon atoms; and [B] subjecting a crude product of the liquid medium-chain alkyl-modified polydimethylsiloxane obtained in preceding step [A] to an odor-removing treatment by conducting a hydrogenation reaction which is carried out in the presence of a hydrogenation catalyst: where R 1 represents a hydrogen atom or a methyl group; “m” is an integer from 0 to 6; and “n” is an integer from 0 to 3; however, when “n” is 0, then at least one R 1 represents a hydrogen atom, where R 2 represents an alkyl group with 4 to 12 carbon atoms; R 3 are groups represented by R 2 above or a methyl group; and “m” and “n” are the same numbers as defined above for general formula (1); however, when “n” is 0, at least one R 3 is the same group as defined for R 2 .