NEW NAPHTHALOCYANINE AND PHTHALOCYANINE CHROMOPHORES Russian patent published in 2024 - IPC C07F5/00 C07F5/06 C09B47/67 C09D11/328 B41M3/14 

FIELD: pharmaceuticals.

SUBSTANCE: invention relates to naphthalocyanine and phthalocyanine chromophores of formula (I), where M¹ represents Al(R¹⁵) or Ga(R¹⁵), R¹⁵ represents OR¹⁶, R¹¹ and R¹⁴ independently of each other represent H, R¹² and R¹³ independently represent H or R¹² and R¹³ together with the carbon atoms to which they are bonded form a 6-membered aromatic ring, R¹⁶ represents a group of formula (Va), formula (Vb) or CH₂CH(OH)CH₂OH of formula (Vc), X¹ represents either O, S or NH, X² represents

w+x+y+z=4 to 20, R⁹ and R¹⁰ are the same or different and each independently represents hydrogen or a methyl group, R¹⁹ represents OH, R²⁰ represents H or C₁-C₄ alkyl group, R³⁰ and R³¹ independently of each other represent hydrogen or a C₁-C₄ alkyl group, R³² represents a C₁-C₂₅ alkyl group or a C₂-C₂₅ alkenyl group, and represents 0 or 1, b is either 0 or 1, b' is either 0 or 1, c is 1, n1 is 0 or a value from 1 to 10. Also the following is proposed: the use of a compound of formula (I) as an IR radiation absorber, a composition of a printing ink and a security document containing compounds of formula (I), and a method of producing a compound of formula (I').

EFFECT: proposed compounds can be used as IR radiation absorbers in compositions for inks, paints and plastics, in particular in a wide range of printing systems and are particularly well suited for security applications for security printing.

15 cl, 2 dwg, 1 tbl, 5 ex