Copper inhibitors for polyolefins

Details Copper inhibitors for polyolefins Copper inhibitors for polyolefins

1974-10-18

1976-01-06

Hoke, V. P.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

252404, 260 459NC, 260 4595R, 260 4595H, 260559, C08G 600

Patent

active

039311031

ABSTRACT:
Compounds of the formula ##SPC1##
Wherein R is an alkyl of 1 to 8 carbon atoms and X is hydrogen or --OR, are useful, in combination with hindered-phenol antioxidants, for inhibiting thermal degradation of polyolefins, especially polypropylene, in contact with copper as metal, alloys, oxides, or salts. Such compounds can be prepared by reacting hydrazine with a naphthoic acid ester which may have an alkoxy group in the 3- position to form an intermediate which reacts with 3-alkoxy-2-naphthoyl chloride to form said compounds.

REFERENCES:
patent: 3734885 (1973-05-01), Muller et al.
patent: 3849942 (1974-11-01), Brunetti

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