Invention Grant
- Patent Title: Toner for developing electrostatic images
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Application No.: US17011167Application Date: 2020-09-03
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Publication No.: US11474443B2Publication Date: 2022-10-18
- Inventor: Takeru Chiba , Sakyo Yagyu
- Applicant: ZEON CORPORATION
- Applicant Address: JP Tokyo
- Assignee: ZEON CORPORATION
- Current Assignee: ZEON CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: WHDA, LLP
- Priority: JPJP2016-130926 20160630
- Main IPC: G03G9/097
- IPC: G03G9/097 ; G03G9/08 ; C08G77/04

Abstract:
The toner for developing electrostatic images is less likely to cause toner ejection and is excellent in printing durability. The toner includes colored resin particles and external additives. The external additives includes an external additive A and an external additive B; wherein the external additive A is silica particles being surface-hydrophobized with a specific hydrophobizing agent and having a specific number average particle diameter; and wherein the external additive B is silicone resin particles having a ratio (BS/TS) of a BET specific surface area (BS) to a theoretical specific surface area (TS) in a range of from 3.0 to 30.0, and having a specific number average particle diameter.
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