Polysiloxane-containing fatty acid derivatives and their preparation and use

摘要

The claimed water-soluble hydrolysis products of polysiloxane-containing fatty acid esters of the formula I are suitable as additives for polyacrylate disperse dyes for improving the scuff resistance of the paints. <IMAGE> n = 1-4 R<1> and R<2> = alkyl- or alkylene-(C11-22), X = alkali metals or calcium They are prepared by hydrolysis of polysiloxane fatty acid derivatives of the formula II <IMAGE> R<1> and R<2> = meaning as in formula (I); R<3> = alkyl-C(1-3> with alkali metal or calcium hydroxide solutions, preferably with NaOH. In this process, the corresponding fatty acid esters having a double bond in the fatty acid radical, in particular methyl esters of undecylic acid and oleic acid, are first reacted with trichlorosilane and then hydrolysed in an inert water-immiscible solvent. Hydrolysis is expediently carried out after determination of the hydrolysis number in a water-methanol mixture. The products obtained are white to faintly coloured solids. Preparation examples and recipe for a wash-resistant disperse dye based on acrylate copolymer for interior paint.