申请人:AKCROS CHEMICALS
公开号:EP0881253A1
公开(公告)日:1998-12-02
β-Ketoesters derived from alcohols or polyols, which are natural product or can be obtained from natural products by fermentation processes and optional subsequent oxidation or reduction, are suitable for stabilising polymers, The ketoesters are represented by formula 1:
A[(O-CHR4-Z-CHR5)m-O-CO-CR1R2-CO-R3]n
wherein:
Ais the residue of an alcohol or polyol selected from hydroxyalkanoic acid esters, sugars and their glycosides, sugar alcohols, sugar acids and their esters, and oligosaccharides;
mis an integer number from 0 up to 6;
nis a number from 1 up to the total number of hydroxyl groups in the polyol;
R1is hydrogen, C1-C8 alkyl, C3-C8 alkenyl or cycloalkyl(alkyl) or C6-C8 aryl or aralkyl;
R2is hydrogen, C1-C8 alkyl or C3-C8 alkenyl;
R3is C1-C18 alkyl, alkoxy or alkylamino, C3-C18 alkenyl, alkanoylmethyl, alkoxycarbonylmethyl or cycloalkyl(alkyl), C6-C18 aryl, aryloxy, arylamino, aralkyl, aralkoxy or aralkylamino, or C8-C18 aroylmethyl, aryloxycarbonylmethyl or arylcarbamoylmethyl;
R4 and R5are independently hydrogen or methyl; and
Zis a direct bond, CH2, CHOH or CH-O-CO-CR1R2-CO-R3.
来源于醇或多元醇的β-酮酸酯是天然产物,或者可以通过发酵过程和可选的氧化或还原获得,适用于稳定聚合物。酮酸酯由公式1表示: A[(O-CHR4-Z-CHR5)m-O-CO-CR1R2-CO-R3]n,其中: A是从羟基烷酸酯,糖及其糖苷,糖醇,糖酸及其酯,寡糖中选择的醇或多元醇的残留物; m是从0到6的整数; n是从1到多元醇中羟基总数的数字; R1是氢,C1-C8烷基,C3-C8烯基或环烷基(烷基)或C6-C8芳基或芳基烷基; R2是氢,C1-C8烷基或C3-C8烯基; R3是C1-C18烷基,烷氧基或烷基氨基,C3-C18烯基,烷酰甲基,烷氧羰基甲基或环烷基(烷基),C6-C18芳基,芳氧基,芳基氨基,芳基烷基,芳基烷氧基或芳基烷基氨基,或C8-C18芳香基甲基,芳氧羰基甲基或芳基氨基甲基; R4和R5独立地是氢或甲基; Z是直接键,CH2,CHOH或CH-O-CO-CR1R2-CO-R3。