Preparation of imidomethyl phthalocyanine derivatives

Details Preparation of imidomethyl phthalocyanine derivatives Preparation of imidomethyl phthalocyanine derivatives

C - Chemistry, Metallurgy

09

B

400/7074, 260/19

C09B 47/04 (2006.01) C08K 5/3412 (2006.01) C09B 47/16 (2006.01) C09B 67/22 (2006.01)

Patent

CA 2007549

A process for the production of an imidomethyl phthalocyanine derivative having the formla I (see Fig I) wherein Pc represents a phthalocyanine residue optionally substituted by chlorine or bromine; M is hydrogen, or any metal capable of forming a metal phthalocyanine; m is a number within the range of from 0 to 1.0; n is a number within the range of from 0.1 to 4 and X is a residue such that, in combination with the group -C(=O)-N-C(=O)- , it forms a ¦ 5-, 6- or 7-membered cyclic anhydride, which process comprises reacting an aminomethyl phthalocyanine having the formula II (SO3H)m-MPc(CH2NH2)n (II), wherein Pc, M, m and n have their previous significance, with a 5-, 6- or 7- membered cyclic acid anhydride having the formula III Image wherein X has its previous significance. The compounds of formula I are useful as additives for surface coatings and as thermal stabilisers for pigments used in engineering plastics.

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