PRODUCTION OF PIGMENTS
The present invention provides a process for the production of a metallized azo pigment having the formula (I) in which R and R1, independently, are hydrogen, halogen or alkyl; X1 is SO3(-) or CO2(-); and M is Ca, Sr, Mn or Ba; comprising coupling, at a pH value below 7.0, a diazotized amine of form...
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Main Authors | , |
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Format | Patent |
Language | English |
Published |
07.04.1992
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Subjects | |
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Abstract | The present invention provides a process for the production of a metallized azo pigment having the formula (I) in which R and R1, independently, are hydrogen, halogen or alkyl; X1 is SO3(-) or CO2(-); and M is Ca, Sr, Mn or Ba; comprising coupling, at a pH value below 7.0, a diazotized amine of formula (II) in which R, R1 and X1 have their previous significance, with a coupling component of formula (III) to produce an azo dyestuff having the formula (IV) in which R, R1 and X1 have their previous significance, and Y is an alkaline earth metal or ammonium ion; and laking the dyestuff of formula IV during or after its production with one or more salts of a metal M wherein M has its previous significance. Also disclosed is a new modification of a pigment of formula I. |
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AbstractList | The present invention provides a process for the production of a metallized azo pigment having the formula (I) in which R and R1, independently, are hydrogen, halogen or alkyl; X1 is SO3(-) or CO2(-); and M is Ca, Sr, Mn or Ba; comprising coupling, at a pH value below 7.0, a diazotized amine of formula (II) in which R, R1 and X1 have their previous significance, with a coupling component of formula (III) to produce an azo dyestuff having the formula (IV) in which R, R1 and X1 have their previous significance, and Y is an alkaline earth metal or ammonium ion; and laking the dyestuff of formula IV during or after its production with one or more salts of a metal M wherein M has its previous significance. Also disclosed is a new modification of a pigment of formula I. |
Author | MORDENTE; MICHAEL BOYD; ALISTAIR B |
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Snippet | The present invention provides a process for the production of a metallized azo pigment having the formula (I) in which R and R1, independently, are hydrogen,... |
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SubjectTerms | ADHESIVES CHEMISTRY DYES LAKES METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MORDANTS NATURAL RESINS ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES PAINTS POLISHES |
Title | PRODUCTION OF PIGMENTS |
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