Process for producing colored spherical polymer particles
US7378473B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 5, 2003 |
| Grant date | May 27, 2008 |
| Priority date | — |
| Expiry date | Nov 17, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0329
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Monodisperse colored spherical particles each having two separated color regions of two hues, that is, two-colored spherical particles, useful, for example, for displays of characters, graphics, images and the like, the two hues being for reverse display in terms of electricity and magnetism from the viewpoint of good suitability for display are provided. In the production process and the apparatus for producing the colored spherical polymer particles, microchannels are utilized including a first microchannel through which a colored continuous phase comprising a color dye/pigment dispersed in a fluid dispersing medium containing a polymerizable resin component and having colored phases of different hues is transferred, and a second microchannel through which a spheroidizing disperse phase flows. The process and apparatus spheroidizes the discharged colored continuous phase having two hues and cures the polymerizable resin component in the colored continuous phase, whereby colored spherical polymer particles are formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.