Patent ID: 6790892
Filing Date: 2004-09-14
Classification: C08K

Abstract:
A composition comprising a halogen-containing polymer normally susceptible to heat-induced deterioration, and degradation products of a blocked mercaptan present during processing of the composition at an elevated temperature, said products including a free mercaptan, wherein said blocked mercaptan has the structure: 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 y is more than 1, z is 1; R1 is a hydroxyalkyl, dihydroxyalkyl, hydroxy(polyalkoxy)alkyl, alkoxyalkyl, hydroxyalkoxyalkyl, alkoxy(hydroxyalkyl), alkoxy(acyloxyalkyl), alkoxy(polyalkoxy)alkyl, 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, alkylcarbonyloxy(polyalkoxy)carbonylalkyl, tetrahydropyranyloxyalkyl, tetrahydropyranyloxy(polyalkoxy)carbonylalkyl, hydroxyaryl, or mercaptoaryl radical having from 1 to 22 carbon atoms; R2, R3, R4, R5, R6, and R7 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, alkoxyaryl, arylcycloalkyl, or a heteroatom, with the option that when a is 1 and m is 0, one of the R3 and R5 radicals joins with R7 and X to form a heterocyclic moiety with X as oxygen, and with the further option that when m is 1, R6 and R7 form a heterocyclic moiety in conjunction with X as a nitrogen atom; with the proviso that when R6â‰ hydroxyl or mercapto, z is 1; anda phenolic antioxidant.