method for the stabilization of organic materials to decomposition by oxygen, light and / or heat under application of (hydroxy dialkylfenyl) - alkaancarbonzuuresters,and moulded products obtained by this method.

摘要

1,135,699. Stabilization of organic materials. DEUTSCHE ADVANCE PRODUKTION G.m.b.H. 18 Aug., 1967 [18 Aug., 1966], No. 38212/67. Heading C2C. [Also in Divisions C3 and C5] Organic materials are stabilized with (hydroxydialkylbenzyl)-mercaptoalkane carboxylic acid esters of formulµ where n is 1 to 4, R 1 and R 2 are alkyl, R 3 is alkyl, cycloalkyl-or aryl where n is 1 or the corresponding n-valent group where n is 2 to 4, which groups may be substituted or may contain ether or thioether linkages and which contain 1 to 20 carbon atoms, and X is a C 1-4 alkylene group. In Example 5 dioctyl phthalate is stabilized with stearyl 2-hydroxy-3- methyl-5-t.-butylbenzyl thioglycolate and with #-ethylthioethyl 4-hydroxy-2,6-dimethylbenzyl thioglycolate and tris-nonylphenyl phosphite.