TONER FOR DEVELOPING ELECTROSTATIC IMAGE

摘要

PURPOSE:To provide a toner which has excellent offset preventive performance and excellent low-temp. fixability, hardly flocculates and is highly resistant to blocking by incorporating a polyester which is a non-linear polyester and of which the main chain has a long chain aliphat. hydrocarbon unit as a binder. CONSTITUTION:The polyester which is the non-linear polyester obtd. from a monomer component contg. a trihydric or higher hydric alcohol monomer and/or trihydric or higher hydric carboxylic acid monomer and of which the main chain has the long chain aliphat. hydrocarbon unit is used as the binder. The amt. of the trihydric or higher hydric alcohol to be used is preferably 1-30mol% by the total alcohol component. The ratio of the trihydric or higher hydric carboxylic acid monomer to be used is preferably 1-30mol% by the total acid component. The low-temp. fixability of the toner tends to be unsatisfactory if the ratio of use is excessive in either case. The non-linearization of the polyester is deficient and the offset preventive performance of the toner is unsatisfactory if the ratio of use is excessively low.