Erasable ink composition containing a polymer-encapsulated colorant obtained by polymerizing monomer in the presence of solid colorant particles
US5852073A · kind A · utility
28Cited by
92References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 20, 1996 |
| Grant date | Dec 22, 1998 |
| Priority date | — |
| Expiry date | May 20, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S260/38
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An erasable ink composition contains a dispersion of solid particles of water-insoluble polymer-encapsulated colorant obtained from the emulsion polymerization of at least one emulsion-polymerizable monomer in the presence of solid colorant particles. The ink is intended for use in any of a variety of marking instruments, in particular, a ball-point pen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.