WO2005076087A1 - Positive chargeable magnetic toner composition - Google Patents
Positive chargeable magnetic toner composition Download PDFInfo
- Publication number
- WO2005076087A1 WO2005076087A1 PCT/KR2005/000321 KR2005000321W WO2005076087A1 WO 2005076087 A1 WO2005076087 A1 WO 2005076087A1 KR 2005000321 W KR2005000321 W KR 2005000321W WO 2005076087 A1 WO2005076087 A1 WO 2005076087A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- poly
- toner
- weight
- mono
- parts
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
- G03G9/087—Binders for toner particles
- G03G9/08702—Binders for toner particles comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- G03G9/08706—Polymers of alkenyl-aromatic compounds
- G03G9/08708—Copolymers of styrene
- G03G9/08711—Copolymers of styrene with esters of acrylic or methacrylic acid
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
- G03G9/087—Binders for toner particles
- G03G9/08702—Binders for toner particles comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- G03G9/08726—Polymers of unsaturated acids or derivatives thereof
- G03G9/08728—Polymers of esters
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
- G03G9/097—Plasticisers; Charge controlling agents
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
- G03G9/097—Plasticisers; Charge controlling agents
- G03G9/09708—Inorganic compounds
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
- G03G9/097—Plasticisers; Charge controlling agents
- G03G9/09708—Inorganic compounds
- G03G9/09725—Silicon-oxides; Silicates
Definitions
- the present invention relates to a positive chargeable magnetic toner
- composition providing the extended life of the drum, reduction of the background
- dual-component developer comprising a toner and a carrier
- the mono-component developing system is
- the thickness of the non-magnetic mono-component developing system In the non-magnetic mono-component developing system, the thickness
- toner is transferred to the developing roller by charging the toner with friction
- the toner is transferred to developing roller by using magnetic force as driving
- doctor blade is arranged so as to make contact with a developing
- a charged toner is used for visualizing the latent image on drum. If
- organic photo conductor (OPC) drum which is manufactured by coating at least
- Japanese Patent Laid-Open No. H10-326028 discloses a
- Laid-Open No. H11-153886 discloses a positive chargeable color toner
- the toner composition comprising (i) toner mother particle, (ii) silica
- An object of the present invention is to provide a positive chargeable
- Another object of the present invention is to provide a method of applying
- apparatus comprising OPC to form an image in the non-contacting developing
- the present invention provides a positive
- chargeable magnetic mono-component toner composition comprising:
- a toner mother particle comprising a binder resin, a magnetic
- the magnetic toner particle comprises 20 to 80 parts by weight of binder resin, 20 to 70 parts by weight of magnetic component, and 0.15 to 4 parts by weight of charge control agent with positive charge.
- the particle size of the magnetic toner particle is
- the magnetic toner particle can be prepared by melting, kneading, and pulverizing method, or
- binder resin used in the art can be used.
- the binder resin may be obtained from polymerization of an alcohol
- the binder resin is preferably contained in the amount of
- the alcohol may be a secondary or higher alcohol, such as ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, butanediol, pentanediol, hexanediol, cyclohexanedimethanol, xylene glycol, bisphenol A, bisphenol A ethylene oxide, bisphenol A propylene oxide, sorbitol, and glycerine, an alcohol derivative, or a mixture thereof.
- ethylene glycol diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, butanediol, pentanediol, hexanediol, cyclohexanedimethanol, xylene glycol, bisphenol A, bisphenol A ethylene oxide, bisphenol A propylene oxide, sorbitol, and glycerine, an alcohol derivative, or a mixture thereof.
- the carboxylic acid may be a secondary or higher carboxylic acid, such as maleic acid, fumaric acid, phthalic acid, isophthalic acid, terephthalic acid, succinic acid, adipic acid, trimeritic acid, cyclopentanedicarboxylic acid, succinic acid anhydride, trimeritic acid anhydride, and maleic acid anhydride, a carboxylic acid derivative, a carboxylic acid anhydride, and a mixture thereof.
- a secondary or higher carboxylic acid such as maleic acid, fumaric acid, phthalic acid, isophthalic acid, terephthalic acid, succinic acid, adipic acid, trimeritic acid, cyclopentanedicarboxylic acid, succinic acid anhydride, trimeritic acid anhydride, and maleic acid anhydride, a carboxylic acid derivative, a carboxylic acid anhydride, and a mixture thereof.
- the examples of the binder resin are an methacrylic acid ester polymer such as polyester, poly(methyl acrylate), poly(ethyl acrylate), poly(butyl acrylate), poly(2-ethylhexyl acrylate), and poly(lauryl acrylate); a methacrylic acid ester polymer such as poly(methyl methacrylate), poly(butyl methacrylate), poly(hexyl methacrylate), poly(2-ethylhexyl methacrylate), and poly(lauryl methacrylate); a copolymer of acrylic acid ester and methacrylic acid ester; a copolymer of a styrene monomer and acrylic acid ester or methacrylic acid ester; an ethylene polymer such as poly(vinyl acetate), poly(vinyl propionate), poly(vinyl lactate), polyethylene, and polypropylene, and copolymers thereof; a styrene copolymer
- examples of the magnetic component are iron oxide such as magnetite,
- metal such as iron, cobalt, nickel, and manganese
- the magnetic component is a fine powder with a
- the component is preferably 20 to 70 parts by weight with a respect to the magnetic
- onium salt such as phosphonium salt and lake compounds of
- diorganotin such as dibutyl tin; diocty tin; dicyclohexyl tin;
- organoborate tin salt such as dibutylborate tin salt, dioctylborate tin salt,
- dicyclohexylborate tin salt guanidine compounds
- imidazole compounds and the mixtures thereof can be used alone or in combination of at least two
- tungsten phosphate molybdenum phosphate
- nigrosine and quaternary ammonium can be used for the laking agent. More preferably, nigrosine and quaternary ammonium.
- ammonium salts are used for the charge control agent.
- the amount of the charge control agent is particularly limited, but is
- the releasing agent may be added for preventing off-set of
- the examples of the releasing agent are various
- waxes and olefin resin with low molecular weight including polypropylene
- polyethylene and propylene-ethylene copolymer, etc, preferably polyethylen.
- the amount of releasing agent is preferably 0.05 to 5 parts by weight with
- the hydrophobic silica with negative charge prevents uneven
- the specific surface area of the hydrophobic silica is preferably 80
- agent contain amine is used for treating hydrophobic silica with positive charge
- silica is embedded in the surface of toner mother particle, the
- the hydrophobic silica with negative charge is the hydrophobic silica with negative charge
- the amount of the silica is more than 0.5 parts by weight, the increased negative
- hydrophobic treatment of silica particle is performed by coating or
- the silicone oil can be applied to hydrophobic treatment of the silica to
- dimethylsilicone oil methylphenylsilicone oil, methylhydrogen silicone oil
- alkyl-modified silicone oil fluorine-modified silicone oil, alcohol-modified silicone
- silicone oil and mercapto-modified silicone oil, may be used.
- the hydrophobic treatment using the silicone oil is not particularly limited, as long as the silicone oil is attached on the surface of the inorganic particle.
- silica is mixed in a mixing tank, added by spray of silicone oil diluted with a solvent, heated, and dried in the mixing tank while stirring.
- the hydrophobic silica is attached to the toner particle using a stirrer
- the hydrophobic silica may be weakly attached to the toner particle or part
- silica means the value measured according to the Brunauer, Emmett, Teller
- the specific surface area may be measured using, for example, the commercially available high-precision automatic gas adsorption apparatus.
- Inert gas particularly nitrogen gas, is used as an adsorption gas to determine
- the fluorinated organic fine powder prevents
- the fluorinated organic fine powder is fine powder including fluororesin
- the average particle size of the fluorinated organic fine powder is the average particle size of the fluorinated organic fine powder.
- the toner blocking occurs at high temperature due to
- the amount of the fluorinated organic fine powder is preferably 0.05 to
- the amount is less than 0.05 parts by weight, it is difficult to prevent the abrasion of the drum surface due to
- the metal oxide fine powder can notably prevent the
- drum surface when many images are printed in a long period of time.
- the metal oxide fine powder has an average particle size of 50-500 nm
- the average particle size is smaller than 50 nm or larger
- the Metal oxide fine powder contains tin oxide in the amount of 20 to 80
- tin oxide preferably 25 to 70 wt%. If the amount of tin oxide is less than 20 wt%, the
- metal oxide can not effectively eliminate the drum contamination, and thereby
- the amount is more than 80 wt%, the decreased
- containing tin oxide can be titanium dioxide, aluminium oxide, zinc oxide,
- the amount of metal oxide fine powder is preferably 0.05 to 0.5 parts by
- the drum If the amount is less than 0.05 parts by weight, the drum
- the amount is more than 0.5 parts by weight, the abrasion of the drum occurs.
- the present invention relates to a method of
- the image forming apparatus comprises OPC.
- OPC organic photo conductor
- the image forming apparatus comprises OPC, a member of
- the developing method using mono-component toner can be classified
- the non-contact type method the toner is charged by friction with
- the doctor blade and sleeve and the toner layer is formed by a magnetic blade.
- toner layer is transferred to latent image on the surface of OPC drum by applying
- the non-contact type method is
- the toner is charged by the contact type method.
- the contact type method has problems of accelerating
- the toner of the present invention can be any toner of the present invention.
- toner mother particle 40 parts by weight of Styren-butadiene copolymer as a binder resin, 45 parts by weight of iron oxide as a magnetic component, 2 parts by weight of nigrosine as a charge control agent, and 5 parts by weight of polyethylene with low molecular weight (like as Mw 2,000) as a releasing agent were mixed with a Henchel Mixer. The mixture was melted and kneaded at 155 ° C in a twin extruder,
- PVDF polyvinylidene fluoride
- titanium oxide which contains 45 wt% of tin, and has average
- PVDF are mixed in the composition as shown in Table 3 and are adhered to
- the magnetic toner particle by mixing with a Henchel Mixer for 5 minutes, to
- the specific surface area of the silica refers to a measurement of the BET method.
- the positive chargeable mono-component toner prepared in Examples 1 to 89, and Comparative examples 1-33 were applied to the non-contact type of copier (NP 3020, Lotte Canon Co. LTD) at the temperature of 20 ° C and relative humidity of 55 ⁇ 5 % to copy 50,000 sheets of paper.
- the image density, -background contamination (fogging image) and drum contamination were measured according to the following method, and then the result were shown in Tables.
- toner can be used in the present invention
- Non-image region were observed under microscope with naked eye.
- O the background contamination of image was not observed
- ⁇ The background contamination of image was partly observed
- x The background contamination of image was definitely observed 3
- drum contamination was partly observed. That is, drum
- the positive chargeable mono-component toner As shown in the Tables, the positive chargeable mono-component toner
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT05721840T ATE507508T1 (en) | 2004-02-06 | 2005-02-03 | POSITIVELY CHARGABLE MAGNETIC TONER COMPOSITION AND USE THEREOF |
EP05721840A EP1711863B1 (en) | 2004-02-06 | 2005-02-03 | Positive chargeable magnetic toner composition and use thereof |
DE602005027660T DE602005027660D1 (en) | 2004-02-06 | 2005-02-03 | Positively Chargeable Magnetic Toner Composition And Use |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2004-0007908 | 2004-02-06 | ||
KR20040007908 | 2004-02-06 | ||
KR10-2005-0009363 | 2005-02-02 | ||
KR1020050009363A KR100727578B1 (en) | 2004-02-06 | 2005-02-02 | Positive charging magnetic torner composition |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005076087A1 true WO2005076087A1 (en) | 2005-08-18 |
Family
ID=36968315
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2005/000321 WO2005076087A1 (en) | 2004-02-06 | 2005-02-03 | Positive chargeable magnetic toner composition |
Country Status (3)
Country | Link |
---|---|
US (1) | US7550241B2 (en) |
EP (1) | EP1711863B1 (en) |
WO (1) | WO2005076087A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7815820B2 (en) * | 2007-10-18 | 2010-10-19 | General Electric Company | Electromagnetic interference shielding polymer composites and methods of manufacture |
JP6385140B2 (en) * | 2014-05-30 | 2018-09-05 | キヤノン株式会社 | toner |
JP6335656B2 (en) * | 2014-05-30 | 2018-05-30 | キヤノン株式会社 | Magnetic toner |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2034907A (en) * | 1978-10-09 | 1980-06-11 | Konishiroku Photo Ind | Magnetic toner for electrostatic photography |
EP0050987A1 (en) * | 1980-10-28 | 1982-05-05 | Minnesota Mining And Manufacturing Company | One part toner powder composition |
US4933251A (en) * | 1987-08-10 | 1990-06-12 | Fuji Xerox Co., Ltd. | Electrophotographic developer |
US5041351A (en) * | 1988-03-30 | 1991-08-20 | Canon Kabushiki Kaisha | One component developer for developing electrostatic image and image forming method |
US5312711A (en) * | 1990-07-19 | 1994-05-17 | Agfa-Gevaert, N.V. | Dry electrostatographic developer composition |
US5512406A (en) * | 1993-10-14 | 1996-04-30 | Canon Kabushiki Kaisha | Toners of different size for electrophotography |
JPH11153886A (en) | 1997-11-19 | 1999-06-08 | Mita Ind Co Ltd | Positive electrofication one-component nonmagnetic color toner |
US6103441A (en) * | 1998-11-12 | 2000-08-15 | Ricoh Company, Ltd. | Color toner for electrophotography |
US6127081A (en) * | 1998-11-19 | 2000-10-03 | Toshiba Tec Kabushiki Kaisha | Developing agent and image forming apparatus |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5053305A (en) * | 1988-09-07 | 1991-10-01 | Tdk Corporation | Composition and method for developing electrostatic latent images |
JP2738162B2 (en) * | 1991-05-13 | 1998-04-08 | 三菱化学株式会社 | Toner for developing electrostatic images |
JP2827822B2 (en) * | 1993-03-25 | 1998-11-25 | 日本電気株式会社 | Electrostatic image developer |
JP3150645B2 (en) | 1997-05-23 | 2001-03-26 | 株式会社巴川製紙所 | Electrostatic toner |
EP0971273B1 (en) * | 1998-07-06 | 2005-04-13 | Canon Kabushiki Kaisha | Toner, image forming method, and apparatus unit |
KR100472021B1 (en) | 2001-12-27 | 2005-03-08 | 주식회사 엘지화학 | Magnetic mono-component torner composition |
US6566025B1 (en) * | 2002-01-16 | 2003-05-20 | Xerox Corporation | Polymeric particles as external toner additives |
KR100450233B1 (en) * | 2002-04-11 | 2004-09-24 | 주식회사 엘지화학 | Method for preparing of non-magnetic monocomponent color toner having superior long term stability |
-
2005
- 2005-02-03 EP EP05721840A patent/EP1711863B1/en not_active Not-in-force
- 2005-02-03 WO PCT/KR2005/000321 patent/WO2005076087A1/en not_active Application Discontinuation
- 2005-02-04 US US11/049,938 patent/US7550241B2/en not_active Expired - Fee Related
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2034907A (en) * | 1978-10-09 | 1980-06-11 | Konishiroku Photo Ind | Magnetic toner for electrostatic photography |
EP0050987A1 (en) * | 1980-10-28 | 1982-05-05 | Minnesota Mining And Manufacturing Company | One part toner powder composition |
US4933251A (en) * | 1987-08-10 | 1990-06-12 | Fuji Xerox Co., Ltd. | Electrophotographic developer |
US5041351A (en) * | 1988-03-30 | 1991-08-20 | Canon Kabushiki Kaisha | One component developer for developing electrostatic image and image forming method |
US5312711A (en) * | 1990-07-19 | 1994-05-17 | Agfa-Gevaert, N.V. | Dry electrostatographic developer composition |
US5512406A (en) * | 1993-10-14 | 1996-04-30 | Canon Kabushiki Kaisha | Toners of different size for electrophotography |
JPH11153886A (en) | 1997-11-19 | 1999-06-08 | Mita Ind Co Ltd | Positive electrofication one-component nonmagnetic color toner |
US6103441A (en) * | 1998-11-12 | 2000-08-15 | Ricoh Company, Ltd. | Color toner for electrophotography |
US6127081A (en) * | 1998-11-19 | 2000-10-03 | Toshiba Tec Kabushiki Kaisha | Developing agent and image forming apparatus |
Also Published As
Publication number | Publication date |
---|---|
EP1711863A1 (en) | 2006-10-18 |
US20050175917A1 (en) | 2005-08-11 |
EP1711863B1 (en) | 2011-04-27 |
US7550241B2 (en) | 2009-06-23 |
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