Vinyltoluene and styrene copolymers as resins for liquid electrostatic toners
US5019477A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 5, 1989 |
| Grant date | May 28, 1991 |
| Priority date | — |
| Expiry date | Jul 5, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/131
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid electrostatic developer comprising: (a) a non-polar liquid having a kauributanol value of less than 30; (b) thermoplastic resin particles comprised of a mixture of (1) a polyethylene homopolymer or a copolymer of (i) polyethylene and (ii) acrylic acid, methacrylic acid or the alkyl esters thereof, wherein (ii) comprises 0.1-20 weight percent of said copolymer and (2) a random copolymer of (iii) selected from the group consisting of vinyltoluene and styrene and (iv) selected from the group consisting of butadiene and acrylate, wherein said thermoplastic resin particles are dispersed in said non-polar liquid form; and (c) an ionic or zwitterionic charge director compound which is soluble in said non-polar liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.