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US 6,984,724 B2Granted
Pigmented 1-naphtholsulphonic acid-based monoazo pigments
AssigneeClariant GmbH
InventorsHans Joachim Metz, Uday T. Nabar, Frank Morgenroth, Chandrashekhar D. Patil, Sunil D. Deval
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Abstract
The invention relates to novel monoazo compounds of formula (1), wherein R1 re resents H, Cl or CH3; R2 represents 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.
Claims8
A compound of the general formula (1)
- where
- R1 is H, Cl or CH3,
- R2 is H or Cl,
- M2+ is Mg2+Mn2+ or Sr2+,
- Y1=COO− or SO3−, and
- Y2=SO3−, Y3=Y4=Y5=H;
- or Y3=SO3−, Y2=Y4=Y5=H;
- or
- Y4=SO3−, Y2=Y3=Y5=H;
- or Y5=SO3−, Y2=Y3=Y4=H.
7 more elements
Dependencies are inferred from the claim text.