Thermal stabilizer compositions for halogen-containing vinyl polymers

A polymeric composition, comprising

• a halogen-containing vinyl polymer,
• a dihydropyridine, a polydihydropyridine, or a mixture thereof, wherein the dihydropyridine is of formula (1)
• 11
• wherein each R5 is independently a C1 to C36 alkyl group, each R4 is independently hydrogen, —OR7, —NHR7, or —NR7R8 each R7 and R8 is independently a substituted or unsubstituted C1-C20 alkyl or C2-C20 alkenyl group, each R6 is independently hydrogen, oxygen, halogen, or a substituted or unsubstituted C1 to C3-6 alkyl, alkenyl, aryl alkaryl, or aralkyl group, and R12 is a hydrogen, a substituted or unsubstituted C1-C20 alkyl, C6-C36 aryl, or C6-C36 alkaryl group, and wherein the polydihydropyridine is of formula (2):
• 12
• wherein A is a C6-18 aryl or C1-22 alkyl group that is unsubstituted or substituted with a C1-C18 alkoxy, C1-C18 alkylthio, hydroxy, acryloyloxy, methacryloyloxy, halogen, phenyl or naphthyl group, each R5 is independently a C1 to C36 alkyl group, a and b are a number from 0 to 20, c is 0 or 1, and d is a number from 1 to 6, with the proviso that d(a+b+c)>1 and (a+b)>0, R10 and R11 are each independently methylene, phenyl, or an alkylene group of the type (—CpH2p—X—)tCpH2p— wherein p is a number from 2 to 18, t is a number from 0 to 10, and X is oxygen or sulfur, and R12 is a hydrogen, a substituted or unsubstituted C1-C20 alkyl, C6-C36 aryl or C6-C36 alkaryl group;
• an amino alcohol of formula 3:
• 13
• wherein Y is a substituted or unsubstituted C1-C36 alkyl, C6-C36 aryl, C7-C36 alkaryl, or C7-C36 aralkyl group;
• R1 and R2 are each independently hydrogen or a substituted or unsubstituted C1-C36 alkyl, C6-C36 aryl, C7-C36 alkaryl, or C7-C36 aralkyl group, and two of Y, R1, or R2 may join together to form a substituted or unsubstituted C2-C36 carbocyclic or heterocyclic group having oxygen or sulfur heteroatoms in the ring, and further wherein Y, R1, and R2 are substituted so as to provide the aminoalcohol with two or more hydroxy groups;
• and/or
• a perchlorate salt.