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Title:
TONER FOR ELECTROSTATIC CHARGE DEVELOPMENT
Document Type and Number:
WIPO Patent Application WO/2012/101875
Kind Code:
A1
Abstract:
A toner comprising a binder resin, a coloring agent and a mold release agent, wherein the binder resin comprises a low-molecular-weight resin component, the low-molecular-weight resin component has a resin softening coefficient (A) represented by formula (1) of more than 0.165 and a storage modulus (dyne/cm2) (G'(Tfb)) of 1×104 or less when the outflow start temperature (°C) as measured by an elevated flow tester is expressed as Tfb. A = |(lnG'(r1)-lnG'(r2))/(T1-T2)| formula (1) (In the formula, T1 represents the temperature (°C) at which the storage modulus (G'(r1)) becomes 1×105 (dyne/cm2) and T2 represents the temperature (°C) at which the storage modulus (G'(r2)) becomes 1×103 as measured using a viscoelasticity measurement apparatus under the conditions of a measurement frequency of 1 Hz and a measurement strain of 1 deg; and "| |" means an absolute value.)

Inventors:
KUSAHARA TERUKI (JP)
AWAMURA JUNICHI (JP)
SUGIMOTO TSUYOSHI (JP)
SHU HYO (JP)
SUZUKI TOMOMI (JP)
UCHINOKURA OSAMU (JP)
HONDA TAKAHIRO (JP)
KOJIMA SATOSHI (JP)
OGAWA SATOSHI (JP)
INOUE DAISUKE (JP)
SATO KOSHI (JP)
ITO DAISUKE (JP)
YOSHIDA RYUUTA (JP)
SATOH SYOUKO (JP)
Application Number:
JP2011/073449
Publication Date:
August 02, 2012
Filing Date:
October 12, 2011
Export Citation:
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Assignee:
RICOH CO LTD (?1438555, JP)
KUSAHARA TERUKI (JP)
AWAMURA JUNICHI (JP)
SUGIMOTO TSUYOSHI (JP)
SHU HYO (JP)
SUZUKI TOMOMI (JP)
UCHINOKURA OSAMU (JP)
HONDA TAKAHIRO (JP)
KOJIMA SATOSHI (JP)
OGAWA SATOSHI (JP)
INOUE DAISUKE (JP)
SATO KOSHI (JP)
ITO DAISUKE (JP)
YOSHIDA RYUUTA (JP)
SATOH SYOUKO (JP)
International Classes:
G03G9/087; G03G9/08; G03G9/10; G03G15/08
Foreign References:
JP2006178407A2006-07-06
JP2006119617A2006-05-11
JP2005107387A2005-04-21
JP2004302458A2004-10-28
JP2009093049A2009-04-30
JPH02157765A1990-06-18
JP2896826B21999-05-31
JP3885241B22007-02-21
JP2001222138A2001-08-17
JPH11249339A1999-09-17
JP2003302791A2003-10-24
JP2004191516A2004-07-08
JP2005338814A2005-12-08
Other References:
See also references of EP 2546698A4
Attorney, Agent or Firm:
HIROTA, KOICHI (?1510053, JP)
Koichi Hirota (?1510053, JP)
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Claims: