Patent ID: 8519039

Claim:
A stabilizing ingredient for halogenated polymers, comprising at least one β-dicarbonyl compound, said ingredient comprising a composition containing at least 90% by weight of the following products A and B: product A: a β-dicarbonyl compound or mixture of β-dicarbonyl compounds or complex mixture which comprises at least one β-dicarbonyl compound, said mixtures containing at least 5% by weight of β-dicarbonyl compounds, and product B: a solvent which is liquid at 20° C. in which the product A is at least partially soluble, wherein the solvent comprises at least one diester of formula R 1 OOC-(CH 2 ) n -COOR 2 , in which R 1 and R 2 , which may be identical or different, are each linear or branched C 1 -C 6 alkyl, or aryl, alkaryl, or arylalkyl radicals having up to 10 carbon atoms, and n is a mean number ranging from 2 to 4, and said product A being at least partially dissolved in said product B; wherein the ratio by weight of the product A to the product B is from 90/10 to 10/90; and wherein the dicarbonyl compounds are selected from the group consisting of: 5-methyl-1-phenylhexane-1,3-dione, octanoylbenzoylmethane, heptanoylbenzoylmethane, stearoylbenzoylmethane, dibenzoylmethane, calcium acetylacetonate and zinc acetylacetonate.