Patent · US Active

Process, dispersion, ink and use

US8740372B2 · kind B2 · utility

0Cited by

2References

20Claims

0Family size

Assignee

Fujifilm Imaging Colorants, Inc. · GB

Inventors

Owen Roger Lozman · Manchester, GB
Thomas Paul · Herne, DE
Christopher John Potter · Alnwick, GB

Key dates

Filing date	Nov 8, 2011
Grant date	Jun 3, 2014
Priority date	—
Expiry date	Nov 8, 2031

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01P2004/64
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

A process for preparing a dispersion of encapsulated solid particles in a predominantly organic liquid vehicle, comprising the following steps: i) providing a dispersion comprising a particulate solid, a liquid medium and a polymeric dispersant having at least 3.0 mmoles of reactive groups per g of dispersant; ii) cross-linking the polymeric dispersant via at least some, but not all, of the reactive groups, said cross-linking being performed in the presence of the particulate solid and the liquid medium and resulting in the encapsulation of each solid particle with a cross-linked polymeric dispersant shell; iii) covalently bonding an end-capping agent to the polymeric dispersant via the reactive groups; said process being such that the final organic liquid vehicle comprises one or more organic liquids and optionally water, provided that water is present at no more than 30% by weight based on the dispersion.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.