Patent ID: 6232380
Filing Date: 2001-05-15
Classification: C08K

Abstract:
A composition capable of stabilizing clear halogenated polymer compositions against the deteriorative effects of heat, light and weathering, comprising:A) a latent mercaptan which degrades during processing of the composition at an elevated temperature to liberate a free mercautan; wherein the latent mercaptan has the formula: ##STR45##wherein a is 0 or 1, m and n are 0 or 1; y=1 to 4; when y=1, z is 1 to 4; and when is more than 1, z is 1; R.sup.1 is a hydroxyalkyl, dihydroxyalkyl, hydroxy(polyalkoxy)alkyl, alkoxyalkyl, hydroxyalkoxyalkyl, alkoxy(hydroxyalkyl), alkoxy(acyloxyalkyl), alkoxy(polyalkoxy)alkyl, carboxyalkyl, acyloxyalkyl, acyloxy(hydroxyalkyl), acyloxyalkoxyalkyl, acyloxy(polyalkoxy)alkyl, benzoyloxy(polyalkoxy)alkyl, alkylenebis-(acyloxyalkyl), alkoxycarbonylalkyl, alkoxycarbonylalkylenyl, hydroxyalkoxycarbonylalkyl, hydroxy(polyalkoxy)carbonylalkyl, alkoxy(polyalkoxy)carbonylalkyl, mercaptoalkyl, mercaptoalkylenyl, mercaptoalkoxycarbonylalkyl, mercaptoalkoxycarbonylalkylenyl, alkoxycarbonyl(amido)alkyl, alkylcarbonyloxy(polyalkoxy)carbonylalkyl, tetrahydropyranyloxyalkyl, tetrahydopyranyloxy(polyalkoxy)carbonylalkyl, hydroxyaryl, mercaptoaryl or carboxyaryl radical having from 1 to 22 carbon atoms; R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, and R.sup.7 are independently hydrogen, a hydroxyl, mercapto, acyl, alkyl, alkylenyl, aryl, haloaryl, alkaryl, aralkyl, hydroxyalkyl, mercaptoalkyl, hydroxyaryl, alkoxyaryl, alkoxyhydroxyaryl, hydroxyalkyl, mercaptoalkyl, mercaptoalkylenyl, mercaptoalkoxycarbonylalkylenyl, hydroxyaryl, arylcarbonyl, mercaptoaryl, carboxyalkyl, carboxyaryl, or acyl radical having from 1 to 22 carbon atoms; X is aryl, haloaryl, alkaryl, hydroxyaryl, dihydroxyaryl, aralkaryl, alkoxyaryl, arylcycloalkyl, or a heteroatom, with the option that when a is 1 and m is 0, one of the R.sup.3 and R.sup.5 radicals joins with R.sup.7 and X to form a heterocyclic moiety with X as a heteroatom selected from the group consisting of oxygen and sulfur, and with the further option that when m is 1, R.sup.6 and R.sup.7 form a heterocyclic moiety in conjunction with X as a nitrogen atom; with the proviso that when X is aralkaryl, R.sup.6 and R.sup.7 are hydroxyl, a is 1 and m is 1, then z is 1 or 2, and with the further proviso that when R.sup.6.noteq.hydroxyl or mercapto, z is 1 and,B) a free phenyl salicylate compound.