The present invention provides a method of making an enantiomerically enriched tertiary or quaternary ammonium salt, and the use of a non-racemic chiral compound in the synthesis of an enantiomerically enriched tertiary or quaternary ammonium salt. The control of nitrogen-based chirality, achieved via the method of the invention, is useful where a specific tertiary or quaternary ammonium enantiomer is preferred over the other enantiomer, for example where a specific tertiary or quaternary ammonium enantiomer is more effective than the other enantiomer in treating a specific medical condition.
Method for the preparation of improved water-base toiletry composition
申请人:SHIN-ETSU CHEMICAL CO., LTD.
公开号:EP0829253A2
公开(公告)日:1998-03-18
Proposed is a reliable method for the preparation of a water-base hair-care or skin-care toiletry preparation capable of imparting the hair or skin of the user with excellent touch feeling of smoothness and sleekness. The method comprises (a) preparing an aqueous dispersion of globular particles of a cured silicone rubber having a specified average particle diameter by the in situ cross-linking hydrosilation reaction in liquid droplets of a vinyl group-containing dimethylpolysiloxane and an organohydrogenpolysiloxane in combination in the presence of a surface active agent and (b) admixing a base mixture consisting of the principal ingredients of a water-base toiletry composition with a specified amount of the aqueous dispersion of the cured silicone rubber particles.
Cosmetic compositions containing an aqueous dispersion of silicone elastomers and methods of use
申请人:Mohammadi Fatemeh
公开号:US20060239950A1
公开(公告)日:2006-10-26
The present invention provides an anti-aging composition comprising more than 30% by weight of an aqueous dispersion of silicone elastomer and an emollient system and methods of use thereof for improving skin condition.