Laked monoazo pigments based on naphtholsulfonic acids

Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...

Reexamination Certificate

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C106S031800, C106S496000, C047S057600, C430S108230, C524S159000, C524S190000, C534S581000, C534S602000, C534S724000

Reexamination Certificate

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06913641

ABSTRACT:
The invention relates to novel monoazo compounds of formula (1), wherein R represents H or Cl, M2+represents Ca2+or SR2+and Y1=H and Y2=SO3−or Y1=SO3−and Y2=H. The compounds of formula (1) are characterized by their high drying power and high light-fastness.

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