Bis-naphthoyl hydrazine derivatives

Details Bis-naphthoyl hydrazine derivatives Bis-naphthoyl hydrazine derivatives

C - Chemistry, Metallurgy

07

C

31/76, 400/9420,

C07C 243/38 (2006.01) C08K 5/25 (2006.01)

Patent

CA 1060473

ABSTRACT OF DISCLOSURE Compounds of the formula Image wherein R is alkyl of 1 to 8 carbon atoms and X is hydrogen or -OR, are useful, in combination with hindered-phenol anti- oxidants, 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 wit 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.

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