Patent ID: 6537466
Filing Date: 2003-03-25
Classification: C08K

Abstract:
A composition for stabilizing PVC consisting essentially of a metal salt stabilizer selected from the group consisting of barium, strontium, calcium, tin, and antimony salts, or an organometallic stabilizer for PVC and a latent mercaptan having the formula 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 when y is more than 1 z is 1; R1 is a hydroxyalkyl, dihydroxyalkyl, hydroxy(polyalkoxy)alkyl, alkoxyalkyl, hydroxyalkoxyalkyl, alkoxy(hydroxyalkyl), alkoxy(polyalkoxy)alkyl, or alkoxycarbonyl(amido)alkyl radical having from 1 to 22 carbon atoms; R2, R3, R4, R5, R6, and R7 are independently hydrogen, a hydroxyl, mercapto, alkyl, akylenyl, aryl, haloaryl, alkaryl, aralkyl, hydroxyalkyl, mercaptoalkyl, hydroxyaryl, alkoxyaryl, alkoxyhydroxyaryl, or arylcarbonyl radical having from 1 to 22 carbon atoms; X is aryl, haloaryl, alkaryl, hydroxyaryl, dihydroxyaryl, aralkaryl, alkoxyaryl, arylcycloalkyl, or a heteroatom; when a is 1 and m is 0, one of the R3 and R5 groups 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 when m is 1, R6 and R7 form a heterocyclic moiety in conjunction with X as a nitrogen atom; with the proviso that when X is aralkaryl, R6 and R7 are hydroxyl, z is 1 or 2, a is 1, and m is 1; and with the further proviso that when R6â‰ hydroxyl, z is 1.