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公开(公告)号：EP3792694A1
公开(公告)日：2021-03-17
申请号：EP20195661.2
申请日：2020-09-11
发明人： MIZUGUCHI, Takuya , SUZUMURA, Yoshitaka , TOMONO, Hiroyuki , MATSUSHITA, Osamu , WATANABE, Shuntaro , AKIYAMA, Hiroki , KAGAWA, Hiroki
IPC分类号： G03G9/087
摘要： A toner comprising a toner particle including a binder resin, wherein in a temperature T (°C) - storage elastic modulus G' (Pa) curve obtained by measuring the toner with a rheometer, a storage elastic modulus G' (80°C) at 80°C is from 2.0 × 10 3 Pa to 2.0 × 10 5 Pa; and a local minimum value of a change amount (dG'/dT) of a storage elastic modulus G' in a range of 60°C to 80°C with respect to a temperature T is -1.0 × 10 6 or less, and when the temperature of the toner is raised, where a projected area of the toner at 80°C is S 1 µm 2 ), a radius of the projected area of the toner at 80°C is R 1 (µm), and a projected area of the toner at 120°C is S 2 (µm 2 ), the S 1 , R 1 and S 2 satisfy a following formula (1): S 2 / S 1 × 1 / R 1 ≤ 0.22.
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公开(公告)号：EP3582019A1
公开(公告)日：2019-12-18
申请号：EP19179609.3
申请日：2019-06-12
摘要： Provided is a magnetic toner having a toner particle containing a binder resin and a magnetic body, wherein the binder resin contains a polymer A having a first monomer unit and a second monomer unit, the first polymerizable monomer is at least one selected from the group consisting of the (meth)acrylic acid esters having C 18-36 alkyl groups, a content of the first monomer unit and a content of the second monomer unit based on the total moles of all monomer units in the polymer A are respectively 5.0 to 60.0 mol% and 20.0 to 95.0 mol%, and assuming that an SP value of the first monomer unit and the second monomer unit are taken as SP 11 (J/cm 3 ) 0.5 and SP 21 (J/cm 3 ) 0.5 , respectively, 3.00 ≤ (SP 21 - SP 11 ) ≤ 25.00 is satisfied, and an oil absorption of the magnetic body is 5 to 40 ml/100 g.
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公开(公告)号：EP3582014A1
公开(公告)日：2019-12-18
申请号：EP19179608.5
申请日：2019-06-12
摘要： A toner comprising a toner particle containing a binder resin, the storage elastic modulus Gt' (150) of the toner at 150°C is at least 1.0 × 10 4 Pa, the binder resin contains a polymer A having a first monomer unit derived from a first polymerizable monomer and a second monomer unit derived from a second polymerizable monomer different from the first polymerizable monomer, the first polymerizable monomer is selected from specific (meth)acrylic acid esters, the contents of the first monomer unit and second monomer unit in the polymer A are within specific ranges, and the SP values of the first monomer unit and second monomer unit are within specific ranges.
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