发明授权
US4555466A Developer comprising a carrier coated with Fe.sub.3 O.sub.4 dispersed in
a butadiene polymer, and a toner
失效
显影剂包括涂覆有分散在丁二烯聚合物中的Fe 3 O 4的载体和调色剂
- 专利标题： Developer comprising a carrier coated with Fe.sub.3 O.sub.4 dispersed in a butadiene polymer, and a toner
- 专利标题（中）： 显影剂包括涂覆有分散在丁二烯聚合物中的Fe 3 O 4的载体和调色剂
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申请号： US534462申请日： 1983-09-21
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公开(公告)号： US4555466A公开(公告)日： 1985-11-26
- 发明人: Seiji Okada , Isao Watanabe , Norio Sawatari , Kazumasa Saito , Toshiaki Narusawa , Hirofumi Okuyama
- 申请人： Seiji Okada , Isao Watanabe , Norio Sawatari , Kazumasa Saito , Toshiaki Narusawa , Hirofumi Okuyama
- 申请人地址： JPX Kawasaki
- 专利权人： Fujitsu Limited
- 当前专利权人： Fujitsu Limited
- 当前专利权人地址： JPX Kawasaki
- 优先权： JPX57-166714 19820927; JPX58-3290 19830114
- 主分类号： G03C5/18
- IPC分类号： G03C5/18 ; G03G9/08 ; G03G9/107 ; G03G9/113 ; G03G15/20 ; G03G9/10 ; G03G11/00
摘要：
A developing material for electrostatic images comprising (a) carrier particles comprising iron beads coated with a layer of butadiene polymer resin in which Fe.sub.3 O.sub.4 powder is dispersed, the volume ratio of the polymer resin to Fe.sub.3 O.sub.4 is from 1:2 to 4:1, and the butadiene polymer is cured by heating with an organic peroxide of from 0.5 to 5.0 parts by weight, based on the weight of the butadiene polymer, which comprises a homopolymer containing 1,2-polybutadiene units, or a homopolymer or copolymer of cyclized 1,4-cis-polybutadiene and (b) from 1% to 6% by weight, based on the weight of the carrier particles, of toner particles which comprise a bis-phenol A-epichlorohydrin type resin, carbon powder, a nigrosine dye, and either a styrene-n-butyl acrylate copolymer or a montan wax.