Back to results
US 2012/0232195 A1Published application
Method of preparing cross-linked colorant dispersions
AssigneeE. I. Du Pont de Nemours and Company
InventorsPatrick F. Mcintyre, John C. Hornby, Christian Jackson, Xiaoqing Li, James A. Silver, Tristan Williams
Life of this patent
Estimating the term…
Abstract
A process for preparing a crossed-linked colorant dispersion is provided in which a partially neutralized dispersant polymer having a cross-linkable moiety is used as a dispersant for a colorant by reacting the cross-linkable moiety on the dispersant with a cross-linking agent.
Claims20
A process for making a cross-linked colorant dispersion comprising the steps of:
- (a) dispersing a colorant in an aqueous vehicle with a partially neutralized dispersant polymer having a cross-linkable moiety, wherein said dispersant polymer is adsorbed to the colorant, and the remaining un-adsorbed dispersant polymer is less than 20% of the colorant concentration;
- (b) reacting the cross-linkable moiety on the dispersant with a cross-linking agent;
- and
- (c) adjusting the pH of the aqueous vehicle to greater than 8.
1 more element
Dependencies are inferred from the claim text.