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US 9,851,650 B2Granted
Toner and method for producing toner
AssigneeCanon Kabushiki Kaisha
InventorsNaoya Isono, Yoshihiro Nakagawa, Harumi Takada, Reo Tagawa, Shiro Kuroki, Sara Yoshida
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Abstract
A toner contains a styrene acrylic resin, a block polymer, and an organosilicon polymer, in which the organosilicon polymer has a specific partial structure, the block polymer has a polyester segment and a vinyl polymer segment, the melting point is 55° C. or more and 90° C. or less, the mass ratio of the polyester segment to the vinyl polymer segment is 40/60 to 80/20, and the polyester segment has a specific unit.
Claims8
A toner, comprising:
- a toner particle including a surface layer,
- wherein,
- the toner particle comprises a styrene acrylic resin and a block polymer,
- the surface layer comprises an organosilicon polymer,
- the organosilicon polymer has a partial structure represented by Formula (1) or (2) shown below,
- in Formulae (1) and (2), L represents a methylene group, an ethylene group, or a phenylene group,
- the block polymer has a polyester segment C and a vinyl polymer segment A,
- a melting point (Tm) of the block polymer is 55° C. or more and 90° C. or less,
- a ratio (C/A ratio) of the polyester segment C to the vinyl polymer segment A is 40/60 or more and 80/20 or less, and
- the polyester segment C has a structural unit represented by Formula (3) shown below,
- in Formula (3), m and n each independently represent an integer of 4 or more and 16 or less.
8 more elements
Dependencies are inferred from the claim text.