Use of substituted biaromatic β-diketone as stabilizing agent of halogenated polymers and resulting polymer
AssigneeRhodia Chimie
InventorsChristian Prud'Homme, Michel Dury
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Abstract
The present invention relates to the use of a stabilising composition free of derivatives of 6-aminouracyl or 6-aminothiouracyl type, and comprising at least one β-diketone bearing two aromatic nuclei, at least one of which bears at least one substituent on one of the two orthopositions or on the paraposition; the said substituent being chosen from —R, —OR, —SR, —COOH, —O—CF3 and —S—CF3 radicals, in which formulae R is an alkyl radical. The invention also relates to halogenated polymers comprising such a stabilising composition.
Claims4
A process for stabilising halogenated polymers, comprising the steps of adding to said polymers a stabilizing amount of a composition free of 6-aminouracyl or 6-aminothiouracyl compounds bearing substituents in positions 1 and 3, and free of metallic stabilisers and comprising 4-t-butyl-4′-methoxydibenzoylmethane or 4,4′-dimethoxydibenzoylmethane.
The process for stabilising halogenated polymers, comprising the steps of adding to said polymers a stabilizing amount of a composition free of 6-aminouracyl or 6-aminothiouracyl compounds bearing substituents in positions 1 and 3, and free of metallic stabilisers, and consisting essentially of:
- 4-t-butyl-4′-methoxydibenzoylmethane or 4,4′-dimethoxydibenzoylmethane.
Dependencies are inferred from the claim text.