The present invention provides a method for the easy preparation of a mixture comprising betaine alkyl ester which gives good softness, smoothness and oily feeling to hair. Thus, according to the present invention, a specific monohalogen carboxylic acid alkyl-ester is made to react with a specific tertiary amine using a specific long-chain alcohol as a reaction solvent and, after a specific betaine alkyl ester is obtained, the excessive above-mentioned tertiary amine is removed whereupon a mixture comprising the said long-chain alcohol and the said betaine alkyl ester is obtained.
本发明提供了一种简易制备
甜菜碱烷基酯混合物的方法,该混合物可使头发具有良好的柔软性、顺滑性和油腻感。因此,根据本发明,使用特定的长链醇作为反应溶剂,使特定的单卤
羧酸烷基酯与特定的叔胺反应,在得到特定的
甜菜碱烷基酯后,除去过量的上述叔胺,从而得到由上述长链醇和上述
甜菜碱烷基酯组成的混合物。