Photosensitive microcapsules containing a synthetic viscosity modifier in the continuous phase
US6964836B2 · kind B2 · utility
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49References
20Claims
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Key dates
| Filing date | Mar 15, 2002 |
| Grant date | Nov 15, 2005 |
| Priority date | — |
| Expiry date | Sep 6, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/002
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process for forming photosensitive microcapsules having discrete capsule walls comprising the steps of forming an emulsion of an oily core material in a continuous aqueous phase containing a carboxyvinyl polymer and enwrapping particles of the oily core material in an amine-formaldehyde condensation product produced by in situ condensation of an amine and formaldehyde wherein the carboxyvinyl polymer comprises a crosslinked polymer of acrylic acid is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.