Patent ID: 6743840
Filing Date: 2004-06-01
Classification: C08K

Abstract:
A polymeric composition comprising:(a) a polymer component susceptible to heat-induced deterioration and (b) degradation products of a blocked mercaptan present in an amount of from about 1 to about 3.5 parts per hundred parts of the polymer component during processing of the polymeric composition at an elevated temperature, wherein said degradation products comprise a free mercaptan, and 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, alkylenebis-(acyloxyalkyl), mercaptoalkyl, mercaptoalkylenyl, alkoxycarbonyl(amido)alkyl, or tetrahydropyranyloxyalkyl radical having from 1 to 22 carbon atoms; R2, R3, R4, R5, R6, R7, are independently hydrogen, a hydroxyl, mercapto, acyl, alkyl, alkylenyl, aryl, haloaryl, alkaryl, aralkyl, hydxoxyalkyl, mercaptoalkyl, hydroxyaryl, alkoxyaryl, alkoxyhydroxyaryl, mercaptoalkylenyl, mercaptoalkoxycarbonylalkylenyl, hydroxyaryl, arylcarbonyl, mercaptoaryl, carboxyalkyl, or carboxyaryl radical having from 1 to 22 carbon atoms; and X is aryl, haloaryl, alkaryl, hydroxyaryl, dihydroxyaryl, aralkyl, 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 a heteroatom selected from the group consisting of: oxygen and sulfur, 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; and with the proviso that when R6 is not a hydroxyl or mercapto, z is 1.