公开(公告)号：JP2004155892A

公开(公告)日：2004-06-03

申请号：JP2002322396

申请日：2002-11-06

Applicant: Toda Kogyo Corp ,  戸田工業株式会社

Inventor： ABE MASAHARU ,  JIKUHARA NARIYASU ,  HORAI SHIGERU ,  ASANAE MASUMI

IPC: G03G15/02 ,  B29C45/14 ,  B29L31/32 ,  C08J5/00 ,  C08K9/06 ,  C08L77/02 ,  C08L81/02 ,  C08L101/00 ,  F16C13/00 ,  H01B1/20

Abstract: PROBLEM TO BE SOLVED: To provide a resin composition which realizes a conductive roll having a high bending modulus, being stable against an environment such as moisture and having uniform electric conductivity and to provide a conductive roll.
SOLUTION: The resin composition comprises 30 to 70 vol.% soft ferrite particles and 70 to 30 vol.% resin and has a volume resistivity of 1.0×10
1 to 5.5×10
4 Ω×m and a bending modulus of 5.0×10
9 to 8.0×10
11 Pa.
COPYRIGHT: (C)2004,JPO

公开(公告)号：JPH1142689A

公开(公告)日：1999-02-16

申请号：JP14554498

申请日：1998-05-27

Applicant: TODA KOGYO CORP

Inventor： ABE MASAHARU ,  HORAI SHIGERU ,  YAMAMOTO HIROSHI ,  NAKAMURA KYOICHI ,  SASAKI OSAMU

IPC: B29C45/42 ,  B29C45/72 ,  B29K101/12 ,  B29K105/16 ,  B29L31/34

Abstract: PROBLEM TO BE SOLVED: To provide an injection molding device, with which an injection molding cycle is shortened so as to enhance its productivity and, at the same time, a molded body is prevented from deforming. SOLUTION: In this device, an injection-molded body is primarily cooled in the cavity of a mold assembly and then taken out of the mold assembly for secondarily cooling. This device consists of the mold assembly 1, which is connected to an injection device 2 and has split structures consisting of a cavity, and a holding means 3, which is provided adjacent to the mold assembly 1 and with which an obtained molded body is taken out of the mold assembly and is cooled secondarily. In addition, the holding means 3 is equipped with at least one chuck, which is made movably to and from the split region of the mold assembly under a mold opened state.

公开(公告)号：JPH09185184A

公开(公告)日：1997-07-15

申请号：JP24564396

申请日：1996-08-28

Applicant: TODA KOGYO CORP ,  UNITIKA LTD

Inventor： HAKATA TOSHIYUKI ,  HORAI SHIGERU ,  TODA TETSUO

IPC: G03G9/107 ,  C08G8/00 ,  C08G8/10 ,  C08K3/00 ,  C08L61/04 ,  C08L61/06

Abstract: PROBLEM TO BE SOLVED: To obtain the composite grains of the spherical magnetic carrier high in a content of the magnetic grains and not containing water-soluble insoluble inorganic salts in the surfaces by specifying the number average grain diameter and the content of the magnetic grains of the composite grains. SOLUTION: The composite grains of the spherical magnetic carrier comprises the magnetic grains converted on the surfaces into lipophilicity in an amount of 80-99weight% of the carrier and a cured phenolic resin having a number average grain diameter of 10-1600μmg. As the magnetic grains, ordinary magnetic materials, such as magnetite and barium ferrite, are used. The phenolic materials to be used are as follows; phenol, m-cresol, p-tertiary-butylphenol, o-propylohenol, bisphenol A, and the like alkylphenols, and the halogenated alkylphenols of which the benzene group or the alkyl group is chlorinated or brominated, that is, the compounds each having a phenolic hydroxyl group, and phenol is preferable when the form of the composite grains is considered.

公开(公告)号：JPH05186669A

公开(公告)日：1993-07-27

申请号：JP2444292

申请日：1992-01-14

Applicant: TODA KOGYO CORP

Inventor： HAKATA TOSHIYUKI ,  HORAI SHIGERU ,  FUKUGAITO MASAAKI ,  KAKIHARA HIROOMI

IPC: C08G59/18 ,  C08G59/00 ,  C08J7/04 ,  C08K9/04 ,  C08K9/06 ,  C08L63/00 ,  C09C3/10 ,  G03G9/08 ,  G03G9/083 ,  G03G9/113 ,  H01F1/00 ,  H01F1/36

Abstract: PURPOSE:To obtain compounded material granules capable of controlling particle sizes in a wide range, having a content of inorganic particles as high as possible and regulated physical properties of surface, comprising inorganic particles and an epoxy resin. CONSTITUTION:Inorganic substance particle-containing epoxy resin granule powder obtained by coating the surface of compounded material granules, which comprise inorganic substance particles with the surface subjected to lipophilic treatment and a cured epoxy resin and have 1-1,000mum number-average particle diameter and 80-99wt.% content of the inorganic substance particles, with a resin.

公开(公告)号：JPH04100850A

公开(公告)日：1992-04-02

申请号：JP22051190

申请日：1990-08-21

Applicant: TODA KOGYO CORP

Inventor： HAKATA TOSHIYUKI ,  HORAI SHIGERU ,  TODA TETSUO

IPC: C08K3/00 ,  C08G8/00 ,  C08G8/04 ,  C08K9/04 ,  C08L61/04 ,  C08L61/06

Abstract: PURPOSE:To improve durability, impact strength, and heat resistance by reacting a phenol or a phenol resin with an aldehyde in the presence of inorg. particles of which the surfaces have been made lipophilic in advance and a basic catalyst in an aq. medium under specified conditions. CONSTITUTION:The surfaces of inorg. particles (e.g. TiO2) are made lipophilic by treating with a coupling agent (e.g. vinyltrichlorosilane) or a surfactant. Then, one mol of a phenol or a phenol resin and 1-4mol of an aldehyde are reacted in the presence of the treated inorg. particles in a wt. of 0. 5-200 times as much as the phenol or phenol resin and 0.02-0.7mol of a basic catalyst (e.g. diethylenetriamine) in an aq. medium in such an amt. that the total solid content is 30-95wt.% under stirring with a peripheral stirrer speed of 1m/sec or higher at 80 deg.C or higher until the curing proceeds. The reaction product is cooled to 40 deg.C or lower to give a spherical composite phenol resin powder contg. the inorg. particles and having a number average particle diameter of 10-100mum and particle content of 80-99wt.%.

公开(公告)号：JPH0495970A

公开(公告)日：1992-03-27

申请号：JP20969090

申请日：1990-08-08

Applicant: UNITIKA LTD ,  TODA KOGYO CORP

Inventor： ECHIGO YOSHIAKI ,  SAKAIDA TSUTOMU ,  ASAMI KEIICHI ,  TODA TETSUO ,  FUJIOKA KAZUO ,  HAKATA TOSHIYUKI ,  HORAI SHIGERU

IPC: G03G9/113 ,  G03G9/09

Abstract: PURPOSE:To enhance aptitude to the carrier for color copying by using the electrophotographic white carrier composed essentially of fine ferromagnetic particles and having a specified L value. CONSTITUTION:The carrier is composed essentially of fine ferromagnetic particles and has a L value of 50 - 100 on the surface in the Lab color development system obtained by forming composite particles having a number average particle diameter of 10 - 1,000mum and a ferromagnetic content of 80 - 99wt.% and chemically plating the surfaces of the particles with a white type metal having an L value of 50 - 100. If said number average particle diameter is 1,000mum, a sharp image cannot be obtained, thus permitting a sharp image to be obtained in the color copying.

公开(公告)号：JPH0361955A

公开(公告)日：1991-03-18

申请号：JP19743289

申请日：1989-07-28

Applicant: TODA KOGYO CORP

Inventor： TODA TETSUO ,  FUJIOKA KAZUO ,  HORAI SHIGERU ,  HAKATA TOSHIYUKI

IPC: G03G9/083 ,  G03G9/087 ,  G03G9/107

Abstract: PURPOSE:To obtain composite particles having an average particle diameter of 1 - 10mum and a bulk density of and an enhanced content of fine ferromagnetic particles by advancing hardening reaction of a phenol resin simultaneously with its reaction in a first stage in specified conditions at the time of producing the fine composite particles comprising the fine ferromagnetic particles and the hardened phenol resin. CONSTITUTION:The content of the ferromagnetic particles can be enhanced by reacting and hardening the phenols with aldehydes particles in an aqueous medium in the presence of a basic catalyst, and the average particle diameter of the produced composite particles can be adjusted to 1 - 10mum by controlling the concentration of the ferromagnetic particles at the time of reaction, thus permitting the obtained composite particles to have an average particle diameter of 1 - 10mum and a bulk density of and a content of the fine ferromagnetic particles of 80 - 99wt.%.