Radiation curable ink containing fluorescent nanoparticles
US8222313B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2008 |
| Grant date | Jul 17, 2012 |
| Priority date | — |
| Expiry date | Dec 16, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S522/909
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Radiation curable compositions, such as UV curable ink compositions, contain a polymeric dispersant, a curable material, that includes a carrier and at least one nanoscale fluorescent pigment particle and an optional non-fluorescent colorant. The fluorescent organic nanoparticle composition includes one or more fluorescent dyes dispersed in a polymeric matrix obtained by modified EA latex process or by emulsion polymerization. In a different embodiment, the nanoscale fluorescent pigment particle composition includes pigment molecules with at least one functional moiety, and a sterically bulky stabilizer compound including at least one functional group, the functional moiety of the pigment associates non-covalently with the functional group of the stabilizer, and the presence of the associated stabilizer limits the extent of particle growth and aggregation, to afford nanoscale-sized pigment particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.