Physiologically unobjectionable stabilizer compositions for halogenated polyolefins
AssigneeHoechst Aktiengesellschaft
InventorsFranz Scheidl, Werner Sommer
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Abstract
The present invention is related to stabilizer compositions for the stabilization of molding compositions based on halogenated polyolefins, essentially consisting of aluminum salts of certain carboxylic acids, organic phosphites and substituted indoles. Further subject of the invention are the molding compositions which are stabilized with said stabilizers. The stabilizers according to the present invention show an excellent stabilizing effect.
Claims6
Stabilizer compositions for stabilizing molding compositions of halogenated polyolefins, consisting of
- A. from 10 to 80 weight % of a neutral or basic aluminum salt of an aliphatic monocarboxylic or dicarboxylic acid having from 6 to 40 carbon atoms or of an aromatic monocarboxylic, dicarboxylic or tricarboxylic acid having 7 to 25 carbon atoms, or mixtures thereof,
- B. from 10 to 70 weight % of a secondary or tertiary organic phosphite or of a cyclic phosphite, or mixtures thereof, and
- C. from 5 to 70 weight % of an indole carrying in 2-position as substituent either an alkyl group, an alkenyl group or an aryl group, or mixtures thereof.
A process for the stabilization of thermoplastic molding compositions based on halogenated polyolefins, comprising that into the molding compositions which may already contain conventional co-stabilizers are incorporated from 0.1 to 10 parts by weight -- calculated on halogenated polyolefin -- of a stabilizer composition composed of
- A. from 10 to 80 weight % of a neutral or basic aluminum salt of an aliphatic monocarboxylic or dicarboxylic acid having from 6 to 40 carbon atoms or of an aromatic monocarboxylic, dicarboxylic or tricarboxylic acid having from 7 to 25 carbon atoms, or mixtures thereof,
- B. from 10 to 70 weight % of a secondary or tertiary organic phosphite or of a cyclic phosphite, or mixtures thereof, and
- C. from 5 to 70 weight % of an indole carrying in 2-position an alkyl, alkenyl or aryl group as substituent, or mixtures thereof.
Dependencies are inferred from the claim text.