Betaine group-containing polysaccharides with recurring anhydroglucose units, their synthesis and their use in cosmetic preparations

摘要

Betaine group-containing polysaccharides with recurring anhydroglucose units of the average, general formula <IMAGE> are disclosed. In this formula the R1 groups are the same or different and represent methyl, <IMAGE> in which n=2 or 3, m=0 to 10, p=0 to 10 and R2 is a hydrogen atom or the betaine group <IMAGE> in which R3 and R4 are the same or different and represent an alkyl group with 1 to 4 carbon atoms and R5 is a divalent aliphatic hydrocarbon group with 1 to 10 carbon atoms, with the proviso that at least 0.5% of the R1 groups in the polysaccharide molecule represent the betaine group. Also disclosed is a method for the synthesis of these compounds and their use in cosmetic preparations, expecially for the care of the hair. In addition, novel compounds of the general formula <IMAGE> are disclosed as intermediates in which the substituents R3, R4 and R5 have the above meaning.