Rheology improvers and pigment compositions having improved rheology
AssigneeCiba Specialty Chemicals Corporation
InventorPhilippe Bugnon
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Abstract
The invention relates to a compound of the 1-aminoanthraquinone, anthanthrone, anthrapyrimidine, quinacridone, dioxazine, diketopyrrolopyrrole, flavanthrone, indanthrone, isoindolinone, isoviolanthrone, perinone, perylene, phthalocyanine, pyranthrone or thioindigo series, which compound has one or more sulfonate groups of formula (1) wherein R1 is methyl or ethyl, R2, R3? and R4 are each independently of the others C6-C24alkyl or C6-C24alkenyl, m is a number from 0.3 to 1.0 and n is a number from 0 to (1.0 m), the compound being suitable for use as a pigment dispersant and rheology improver. Also claimed are modified pigments having that compound on their surface, and also pigment compositions and dispersions comprising that compound.
Claims18
A composition, comprising
- (a) An anthanthrone, anthrapyrimidine, quinacridone, diketopyrrolopyrrole, flavanthrone, indanthrone, isoindolinone, isoviolanthrone, perinone, pyranthrone or thioindigo pigment, or a solid solution or a mixed crystal thereof, and
- (b) a sulfonation product of a pigment of (a) or as a host component in the solid solution (a) or in the mixed crystal (a), wherein in the sulfonation product the pigment is substituted by at least one group of formula (I)
- wherein
- R1 is methyl or ethyl,
- R2, R3 and R4 are each independently of the others C6-C24alkyl or C6-C24alkenyl,
- m is a number from 0.3 to 1.0 and
- n is a number from 0 to (1.0-m).
An anthanthrone, anthrapyrimidine, quinacridone, diketopyrrolopyrrole, flavanthrone, indanthrone, isoindolinone, isoviolanthrone, perinone, pyranthrone or thioindigo pigment, mixed crystal or the solid solution thereof wherein the pigment, the mixed crystal or the solid solution has on its surface sulfonate groups of the formula (I),
- wherein
- R1 is methyl or ethyl,
- R2, R3 and R4 are each independently of the others C6-C24alkyl or C6-C24alkenyl,
- m is a number from 0.3 to 1.0 and
- n is a number from 0 to (1.0-m).
An anthanthrone, anthrapyrimidine, quinacridone, diketopyrrolopyrrole, flavanthrone, indanthrone, isoindolinone, isoviolanthrone, perinone, pyranthrone or thioindigo compound, which compound has one or more sulfonate groups of formula (I)
- wherein
- R1 is methyl or ethyl,
- R2, R3 and R4 are each independently of the others C6-C24alkyl or C6-C24alkenyl,
- m is a number from 0.3 to 1.0 and
- n is a number from 0 to (1.0-m).
Dependencies are inferred from the claim text.