发明授权
US5744278A Toner for developing an electrostatic image and process for producing a
toner
失效
用于显影静电图像的调色剂和用于生产调色剂的方法
- 专利标题: Toner for developing an electrostatic image and process for producing a toner
- 专利标题(中): 用于显影静电图像的调色剂和用于生产调色剂的方法
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申请号: US835878申请日: 1997-04-08
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公开(公告)号: US5744278A公开(公告)日: 1998-04-28
- 发明人: Yasukazu Ayaki , Takeshi Ikeda , Tetsuro Fukui , Yoshinobu Baba , Hitoshi Itabashi , Yayoi Nagao
- 申请人: Yasukazu Ayaki , Takeshi Ikeda , Tetsuro Fukui , Yoshinobu Baba , Hitoshi Itabashi , Yayoi Nagao
- 申请人地址: JPX Tokyo
- 专利权人: Canon Kabushiki Kaisha
- 当前专利权人: Canon Kabushiki Kaisha
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX8-111165 19960409; JPX9-045658 19970228
- 主分类号: G03G9/08
- IPC分类号: G03G9/08 ; G03G9/087 ; G03G9/093
摘要:
A toner for electrophotography contains at least a colorant and a binder resin, and (i) contains 0.1 to 15 parts by weight of colorant per 100 parts by weight of binder resin, (ii) has a number average particle size of 0.5 to 6.0 .mu.m, (iii) has a coefficient of variation of 20% or less based on a number distribution, and (iv) has a capsule structure containing a shell layer and a core. The toner has solvent-mixture-soluble resin components extracted with a solvent mixture of ethanol and methyl ethyl ketone wherein the maximum glass transition temperature (Tg1) of a first soluble resin component obtained by extracting until 10% by weight of the total weight of the solvent-mixture-soluble resin components, and the maximum glass transition temperature (Tg2) of a second soluble resin component of the remainder satisfy the following relations: Tg1>Tg2 and Tg1.gtoreq.50.degree. C.
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