公开(公告)号：EP3253808A4

公开(公告)日：2017-12-20

申请号：EP16746306

申请日：2016-01-28

申请人： RICOH CO LTD

发明人： HARADA SHIGEYUKI ,  YANAGAWA YOSHIKI ,  KATOH KEITA ,  FUKUOKA MASAYUKI ,  NAGAI KAZUKIYO ,  KOIZUKA YUUSUKE ,  SHIMADA TOMOYUKI ,  SABU AKIYOSHI

IPC分类号： C08F220/36 ,  B41J2/01 ,  B41M5/00 ,  C08F212/08 ,  C08F222/02 ,  C09D11/023 ,  C09D11/106 ,  C09D11/30 ,  C09D11/322 ,  C09D11/326 ,  C09D11/40

CPC分类号： C08F220/36 ,  B41J2/04 ,  C08F212/08 ,  C08F2220/365 ,  C09D11/106 ,  C09D11/107 ,  C09D11/30 ,  C09D11/322 ,  C09D11/326 ,  C08F222/02

摘要： To provide a copolymer including: a structural unit represented by the following General Formula (1) where X represents a hydrogen atom or a cation; a structural unit expressed by the following Structural Formula (1); and a structural unit represented by the following General Formula (2) where R is a hydrogen atom or a methyl group, L is a single bond or -(CH2)n-O-CO- where n is an integer in a range of from 2 through 18, and a carbonyl carbon atom in the -(CH2)n-O-CO- is bound to naphthyl.

公开(公告)号：EP3272776A4

公开(公告)日：2018-01-31

申请号：EP16764899

申请日：2016-03-11

申请人： RICOH CO LTD

发明人： HARADA SHIGEYUKI ,  MATSUYAMA AKIHIKO ,  YANAGAWA YOSHIKI ,  FUKUOKA MASAYUKI ,  YAMAZAKI TAKUYA ,  NAGAI KAZUKIYO ,  KOIZUKA YUUSUKE ,  SHIMADA TOMOYUKI ,  SABU AKIYOSHI

IPC分类号： C08F220/58 ,  B41J2/01 ,  B41M5/00 ,  C08F220/36 ,  C09B67/20 ,  C09D11/326

CPC分类号： C09D11/107 ,  B41J2/17503 ,  B41M5/00 ,  C08F220/36 ,  C08F220/58 ,  C08F2220/346 ,  C08F2220/365 ,  C09D11/033 ,  C09D11/322 ,  C09D11/326

摘要： A copolymer including a structural unit represented by General Formula (1) below, and a structural unit represented by General Formula (2) below, where, in General Formula (1), R 1 is a hydrogen atom or a methyl group, L 1 is an alkylene group having 2 or greater carbon atoms but 5 or less carbon atoms, and X is a hydrogen atom or a cation, where, in General Formula (2), R 2 is a hydrogen atom or a methyl group and L 2 is an alkylene group having 2 or greater carbon atoms but 18 or less carbon atoms.

公开(公告)号：EP2756356A4

公开(公告)日：2015-02-25

申请号：EP12831678

申请日：2012-09-12

申请人： RICOH CO LTD

发明人： MORIYA YOSHIHIRO ,  YAMADA MASAHIDE ,  NEMOTO TAICHI ,  NAKAJIMA YUKIKO ,  YAMAUCHI YOSHITAKA ,  MAKABE KEIJI ,  YAMASHITA DAIKI ,  AMEMORI SUZUKA ,  SABU AKIYOSHI

IPC分类号： G03G9/087 ,  G03G9/08

CPC分类号： G03G9/08755 ,  G03G9/0821 ,  G03G9/08788 ,  G03G9/08791 ,  G03G9/08795 ,  G03G9/08797

摘要： An electrophotographic toner including: a binder resin, wherein the binder resin has one glass transition temperature Tg and the glass transition temperature Tg of the binder resin is within 25° C. to 65° C. as measured in second heating with a differential scanning calorimeter at a heating rate of 5° C./min, and wherein a phase image of the binder resin obtained with an atomic force microscope (AFM) of tapping mode contains first phase difference regions and a second phase difference region such that the first phase difference regions are dispersed in the second phase difference region, where the first phase difference regions correspond to greater phase difference regions and the second phase difference region corresponds to a smaller phase difference region when an intermediate value between a maximum value and a minimum value of the phase differences is used as a threshold.

公开(公告)号：EP2898372A4

公开(公告)日：2015-10-14

申请号：EP13839948

申请日：2013-09-10

申请人： RICOH CO LTD

发明人： NAGATA KOUSUKE ,  YAMADA MASAHIDE ,  NAKAYAMA SHINYA ,  SABU AKIYOSHI ,  MORITA TATSUYA ,  HASE TAKAMASA ,  AMEMORI SUZUKA ,  TAKAHASHI RINTARO

IPC分类号： G03G9/087 ,  G03G9/08

CPC分类号： G03G9/08755 ,  G03G9/0819 ,  G03G9/0821 ,  G03G9/08764 ,  G03G9/08795 ,  G03G9/08797 ,  G03G15/08 ,  G03G15/2003

公开(公告)号：EP2294485A4

公开(公告)日：2013-09-11

申请号：EP09773348

申请日：2009-06-17

申请人： RICOH CO LTD

发明人： SAWADA TOYOSHI ,  KOTSUGAI AKIHIRO ,  SABU AKIYOSHI

IPC分类号： G03G9/087 ,  G03G9/08 ,  G03G9/097

CPC分类号： G03G9/08755 ,  G03G9/08702 ,  G03G9/08753 ,  G03G9/08764 ,  G03G9/08786 ,  G03G9/08795 ,  G03G9/08797 ,  G03G9/09741 ,  G03G9/09766