ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER

PROBLEM TO BE SOLVED: To provide an electrostatic charge image developing toner excellent in low-temperature fixability, heat-resistant storage property and durability.SOLUTION: An electrostatic charge image developing toner has a core and a shell. The core comprises amorphous polyester (a) with a s...

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Bibliographische Detailangaben
Hauptverfasser: FUKUTOSHI NORIHIRO, HAYASHI HIROTO
Format: Patent
Sprache:eng
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide an electrostatic charge image developing toner excellent in low-temperature fixability, heat-resistant storage property and durability.SOLUTION: An electrostatic charge image developing toner has a core and a shell. The core comprises amorphous polyester (a) with a softening point of 75-105°C, obtained by polycondensation of: an alcohol component including aliphatic diol; and an acid component including alkenylsuccinic acid of 5-50 mol%. The shell includes amorphous polyester (b) obtained by polycondensation of: an alcohol component including aromatic diol; and an acid component including aromatic carboxylic acid. The content of aliphatic diol and aliphatic carboxylic acid is 55 mol% or larger in total monomers composing the polyester of the core, and the content of aromatic diol and aromatic carboxylic acid is 80 mol% or larger in total monomers composing the polyester of the shell.