STABILISED VINYL CHLORIDE POLYMER COMPOSITIONS

摘要

A composition based on polymer and/or co-polymers of vinyl chloride comprises the following compounds expressed by weight percent relative to the weight of the polymer/co-polymer used: (a) from 0.1 %-5 % of one or more organotin salts and/or one or more divalent metal salts of a carboxylic acid or phenol; and (b) from 0.001 %-5 % of one or more metal salts of the organic compounds of general formula (A) in which R1 represents a linear or branched alkylene or alkenylene radical having up to 20 carbon atoms, an aralkylene radical having from 7 to 20 carbon atoms or an arylene or cycloalkylene radical having from 6 to 20 carbon atoms, the cycloalkylene radicals optionally containing carboncarbon double bonds. These radicals are optionally unsubstituted or substituted, by one or more halogen atoms or hydroxyl groups, aryl or cycloalkylene radicals, one or more alkyl and/or alkoxy radicals, the above mentioned radicals optionally also being modified by the presence in an aliphatic chain of one or more -O-, -CO- or -CO2- chain members or N; R2 represents O, S NR5 or NNHR5 wherein R5 is defined as R1, H or C(S)NHR6 wherein R6 is defined as R1 or H; R3 and R4 are defined as R1 or H and can be the same or different. A is either O, S or NR7, with R7 defined as R1 and H, with the exception that when A = O, R2 = O.