Toner for electrostatic charge development

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8778588
APP PUB NO 20130022371A1
SERIAL NO

13637774

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Abstract

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To provide a toner, which contains a binder resin, a colorant, and a releasing agent, wherein the binder resin contains a low molecular weight resin component, where the low molecular weight resin component has a resin softening coefficient (A), represented by the following formula (1), satisfying A>0.165, and has storage elastic modulus (dyne/cm2) G′(Tfb) satisfying G′(Tfb)≦1×104 where Tfb is a flow onset temperature (° C.) of the low molecular weight resin component as measured by a capillary rheometer:

description='In-line Formulae' end='lead'A=|[(r1)−ln G′(r2)]/(T1−T2)|  Formula (1)description='In-line Formulae' end='tail'

(where T1 is temperature (° C.) at which storage elastic modulus G′(r1) is 1×105 (dyne/cm2) and T2 is temperature (° C.) at which storage elastic modulus G′(r2) is 1×103 (dyne/cm2) as measured by means of a viscoelasticity measuring device with measuring frequency of 1 Hz, and measuring distortion of 1 deg; and | | represents an absolute value.).

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Patent Owner(s)

  • RICOH COMPANY, LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Awamura, Junichi Shizuoka, JP 69 1369
Honda, Takahiro Shizuoka, JP 77 997
Inoue, Daisuke Shizuoka, JP 248 1865
Ito, Daisuke Shizuoka, JP 448 2629
Kojima, Satoshi Shizuoka, JP 103 960
Kusahara, Teruki Shizuoka, JP 25 331
Ogawa, Satoshi Nara, JP 194 1832
Sato, Koshi Miyagi, JP 6 48
Satoh, Syouko Miyagi, JP 8 126
Shu, Hyo Kanagawa, JP 33 379
Sugimoto, Tsuyoshi Shizuoka, JP 86 1250
Suzuki, Tomomi Shizuoka, JP 90 2708
Uchinokura, Osamu Shizuoka, JP 70 1552
Yoshida, Ryuuta Miyagi, JP 8 50

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