Erasable ink composition containing a polymer-encapsulated colorant derived from monomer containing dissolved colorant
US5661197A · kind A · utility
40Cited by
90References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 20, 1996 |
| Grant date | Aug 26, 1997 |
| 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 an aqueous dispersion of water-insoluble polymer-encapsulated colorant obtained from the emulsion polymerization of at least one hydrophobic emulsion-polymerizable monomer with at least a portion of the monomer containing colorant dissolved therein. 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.