Liquid developer for use in electrophotography
US4264699A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1979 |
| Grant date | Apr 28, 1981 |
| Priority date | — |
| Expiry date | Aug 28, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/133
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid developer for use in electrophotography which is prepared by dispersing a pigment or dye and a resin in a carrier liquid comprising a nonaqueous solvent having a high insulating property and a low dielectric constant, wherein said resin comprises those obtained by grafting, upon a copolymer comprising a monomer having the general formula ##STR1## [wherein R is --H or --CH.sub.3 and X is a phenyl group, a methylphenyl group, --COOC.sub.n H.sub.2n+1 (1.ltoreq.n.ltoreq.20) or --COOC.sub.2 H.sub.4 N(C.sub.m H.sub.2m+1).sub.2 (1.ltoreq.m.ltoreq.5)], a monomer having a glycidyl group and a unsaturated carboxylic acid or its anhydride, in particular the unsaturated carboxylic acid or its anhydride when the copolymer has the glycidyl group as the constitution unit, and the monomer having a glycidyl group when the copolymer has the unsaturated carboxylic acid or its anhydride as the constitution unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.