Block copolymer containing binder composition and electro photographic toner composition derived therefrom
US5641602A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1995 |
| Grant date | Jun 24, 1997 |
| Priority date | — |
| Expiry date | Sep 8, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/105
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Intermediate binder composition for use in toner compositions, comprising (a) a block copolymer comprising one predominantly poly(monovinyl aromatic) block per molecule and one predominantly poly(conjugated diene) block per molecule, the latter blocks being selectively hydrogenated to a residual unsaturation degree of 20% or lower, in an amount of from 5 to 35% by weight relative to the weight of the intermediate binder composition, and a microcrystalline wax, having a weight average molecular weight of from 1000 to 10,000, and having a drop point of 75.degree. C. or higher (measured according to ASTM D 3104), in an amount of from 95 to 65% by weight relative to the weight of the binder composition. Also covered are electrophotographic toner compositions containing the intermediate binder composition and magnetizable particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.