Toner for developing electrostatic latent image
US5712071A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1995 |
| Grant date | Jan 27, 1998 |
| Priority date | — |
| Expiry date | Oct 16, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/09733
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner produced by pulverizing and classifying a melt and kneaded mixture comprising a binder resin, a colorant and an offset preventing agent, said binder resin comprising a styrene-type copolymer and said offset preventing agent comprising a polypropylene having a softening point of 135.degree. to 155.degree. C. and a polyethylene having a softening point of 100.degree. to 150.degree. C., wherein a total amount of said polypropylene and said polyethylene is 2 to 10 parts by weight per 100 parts by weight of the binder resin and a weight ratio of said polypropylene to said polyethylene is 1:3 to 1:1, and said pulverizing and classifying carried out by a pulverizer and classifier which impart mechanical impact on a particle to be treated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.