Patent ID: 7282527

Claim:
A method for stabilizing a halogen-containing polymer comprising adding to said polymer a thermally stabilizing amount of a mixture comprising: A) from 0.01 to 10 parts by weight, based on 100 parts by weight of the halogen-containing polymer, of at least one polyalkylene glycol of general formula: wherein: R 1 , R 2 , and R 5 are independently selected from the group consisting of hydrogen, alkyl, hydroxyl, hydroxyalkyl, thiol, and thioalkyl; R 3 and R 4 are independently selected from the group consisting of hydrogen, alkyl, and acyl; and n is 4; m is 3 and the three substituents in P can be the same or different; B) from 0.00 1 to 5 parts by weight, based on 100 parts by weight of the halogen-containing polymer, of at least one metal salt of a strong acid selected from the group consisting of perchloric acid, trifluoroacetic acid, trifluoromethanesulfonic acid, alkylsulfuric acid, phosphotungstic acid, HPF 6 , HBF 4 , and HSbF 6 ; and, optionally, C) from 0.001 to 10 parts by weight, based on 100 parts by weight of the halogen-containing polymer, of at least one metal soap.