Rheology improvers and pigment compositions having improved rheology
US6827775B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 10, 2003 |
| Grant date | Dec 7, 2004 |
| Priority date | — |
| Expiry date | Jun 10, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B68/441
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
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, R<CUSTOM-CHARACTER FILE="US06827775-20041207-P00900.TIF" ALT="custom character" HE="20" WI="20" ID="CUSTOM-CHARACTER-00001"/>2, 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.