发明授权
- 专利标题: Toner for electrophotography
- 专利标题(中): 电子照相用碳粉
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申请号: US455790申请日: 1999-12-07
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公开(公告)号: US6077639A公开(公告)日: 2000-06-20
- 发明人: Tetsuhiro Semura , Yoshihiro Ueno
- 申请人: Tetsuhiro Semura , Yoshihiro Ueno
- 申请人地址: JPX Tokyo
- 专利权人: Kao Corporation
- 当前专利权人: Kao Corporation
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX10-347534 19981207
- 主分类号: G03G9/087
- IPC分类号: G03G9/087
摘要:
A toner for electrophotography comprising a resin binder comprising a polyester resin, as a main component, obtained by polycondensing an alcohol component with a carboxylic acid component, wherein the alcohol component comprises an alkylene oxide adduct of bisphenol A represented by the formula (I): ##STR1## wherein R is an alkylene group having 2 or 3 carbon atoms; x and y are positive numbers showing an average molar number of an added oxyalkylene group, wherein a sum of x and y is from 1.5 to 10, in an amount of 60% by mol or more of the alcohol component, and wherein the carboxylic acid component comprises a tricarboxylic acid compound, wherein a number-average molecular weight of the polyester resin is 1,000 to 8,000; and a coloring agent, wherein an alkylene oxide adduct of bisphenol A of which addition molar number is 3 or more is not present in the polyester resin, or remains in an amount of less than 1.0% by weight.
公开/授权文献
- US5008730A Contact stud structure for semiconductor devices 公开/授权日:1991-04-16
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