Pigmented 1-naphtholsulphonic acid-based monoazo pigments

Organic compounds -- part of the class 532-570 series – Organic compounds – Azo

Reexamination Certificate

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Details

C534S588000, C534S602000, C534S724000, C534S840000, C534S841000, C534SDIG004, C106S031800, C106S496000, C430S108230, C524S159000, C524S190000, C047S057600

Reexamination Certificate

active

06984724

ABSTRACT:
The invention relates to novel monoazo compounds of formula (1), wherein R1re resents H, Cl or CH3; R2represents H or Cl; M2+represents Mg2+, Mn2+or Sr2+; Y1=represents COO−or SO3−; Y2=SO3−; Y3=Y4=Y5=H; or Y3=SO331, Y2=Y4=Y5=H; or Y4=SO3−, Y2=Y3=Y5=H; or Y5=SO3−, Y2=Y3=Y4=H. The compounds of formula (1) are characterized by high intensity and light-fastness.

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