BINDER RESIN FOR TONER AND TONER FOR ELECTROPHOTOGRAPHY

• Main Authors: SAKATA KAZUYA, YOSHIDA TAKESHI
• Format: Patent
• Language: English
• Published: 16.02.2006
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; CINEMATOGRAPHY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; GENERAL PROCESSES OF COMPOUNDING; HOLOGRAPHY; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MAGNETOGRAPHY; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PHOTOGRAPHY; PHYSICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

A binder resin for toners which is excellent in fixability and non- offset properties even when used in a high-speed copier and is excellent also in suitability for pulverization, long-lasting developing properties, etc.; and a toner for electrophotography. The binder resin for toners comprises a resin which is obtained by mixing a vinyl polymer with a crosslinked resin obtained by reacting a vinyl polymer having a specific molecular weight and a specific functional-group content with a crosslinking agent and which has a specific gel content. A toner made with the binder resin is excellent in performances including fixability even when used in a high-speed copier. Even when continuously used for long in a copier, the toner gives electrophotographic prints with satisfactory reproduction.