ENZYMATIC SYNTHESIS OF POLYESTERS

摘要

Linear polyesters made of polybasic carboxylic acids and polyhydric alcohols can be obtained when a polyol is reacted with at least two primary alcohol functions and at least one secondary alcohol function or one amino function and a dicarboxylic or tricarboxylic acid or an ester of a dicarboxylic or tricarboxylic acid in the presence of an effective quantity of a lipase. The lipase can be obtained from Candida cylindracea, Candida lipolytica, Candida rugosa, Candida antarctica, Candida utilis, Chromobacterium viscosum, Geotrichum viscosum, Geotrichum candidum, Mucor javanicus, Mucor miehei, pig pancreas, Pseudomonas spp., Pseudomonas fluorescens, Pseudomonas cepacia, Rhizopus arrhizus, Rhizopus delemar, Rhizopus niveus, Rhizopus oryzae, Aspergillus niger, Penicillium roquefortii, Penicillium camembertii or Pseudomonas fluorescens, or an esterase which is be obtained from Bacillus spp. Bacillus thermoglucosidasius, Mucor miehei, horse liver, Saccharomyces cerevisiae or pig liver, or mixtures thereof. The use of said enzymes in the inventive method enables the secondary alcohol functions or amino functions to freely occur on the basis of the polyol.