Dispersions, process for preparing dispersions, inks and uses
US9441121B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 25, 2012 |
| Grant date | Sep 13, 2016 |
| Priority date | — |
| Expiry date | Mar 13, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D175/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the preparation of a dispersion, comprising: dispersing a composition comprising a particulate solid, a liquid medium and a dispersant; wherein the dispersant is obtained by a process comprising at least the steps a) and b): a) co-polymerising a monomer composition comprising at least the components i) and ii) so as to form a phospho-ester functional polymer: i) a monomer having at least one phospho-ester group and two groups independently selected from hydroxyl, amino, thiol and hydrazo groups, ii) a diisocyanate; and b) hydrolysing at least some of the phospho-ester groups in the phospho-ester functional polymer so as to result in a dispersant having phosphorus containing anionic groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.