EP0952495B1 - Encapsulated toner and its production process - Google Patents
Encapsulated toner and its production process Download PDFInfo
- Publication number
- EP0952495B1 EP0952495B1 EP97909708A EP97909708A EP0952495B1 EP 0952495 B1 EP0952495 B1 EP 0952495B1 EP 97909708 A EP97909708 A EP 97909708A EP 97909708 A EP97909708 A EP 97909708A EP 0952495 B1 EP0952495 B1 EP 0952495B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- toner
- shell
- polymerizable monomer
- core
- polymer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
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
- G03G9/08775—Natural macromolecular compounds or derivatives thereof
- G03G9/08782—Waxes
-
- 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
- G03G9/093—Encapsulated toner particles
-
- 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
- G03G9/093—Encapsulated toner particles
- G03G9/09307—Encapsulated toner particles specified by the shell material
- G03G9/09314—Macromolecular 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
- G03G9/093—Encapsulated toner particles
- G03G9/0935—Encapsulated toner particles specified by the core material
- G03G9/09357—Macromolecular compounds
- G03G9/09371—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
- G03G9/09733—Organic compounds
Definitions
- two-component developers composed of a toner and carrier particles, and one-component developers composed substantially of a toner alone and making no use of any carrier particles are known as developers for making electrostatic latent images visible.
- the one-component developers include magnetic one-component developers containing magnetic powder, and non-magnetic one-component developers containing no magnetic powder.
- a flowability improver such as colloidal silica is often added independently in order to enhance the flowability of the toner.
- the toner there are generally used colored particles obtained by dispersing a colorant such as carbon black and other additives in a binder resin and granulating the dispersion.
- the polymerized toner according to the present invention is a polymerized toner of a core-shell structure, comprising core particles and shell which covers each of the core particles.
- the polymerized toner according to the present invention can be produced by polymerizing a polymerizable monomer for shell in the presence of core particles.
- the core particles comprise, as essential components, a polyfunctional ester compound formed of a trifunctional or still higher polyfunctional polyhydric alcohol and a carboxylic acid having 10 to 30 carbon atoms and a colorant in a polymer component (binder resin).
- the glass transition temperature of a polymer component making up the shell is higher than that of the polymer component making up the core particles.
- magenta dyes for full-color toners include oil-soluble dyes such as C.I. Solvent Red 1, 3, 8, 23, 24, 25, 27, 30, 49, 81, 82, 83, 84, 100, 109 and 121; C.I. Disperse Red 9; C.I. Solvent Violet 8, 13, 14, 21 and 27; and C.I. Disperse Violet 1; and basic dyes such as C.I. Basic Red 1, 2, 9, 12, 13, 14, 15, 17, 18, 22, 23, 24, 27, 29, 32, 34, 35, 36, 37, 38, 39 and 40; and C.I. Basic Violet 1, 3, 7, 10, 14, 15, 21, 25, 26, 27 and 28.
- oil-soluble dyes such as C.I. Solvent Red 1, 3, 8, 23, 24, 25, 27, 30, 49, 81, 82, 83, 84, 100, 109 and 121
- C.I. Disperse Red 9 C.I. Solvent Violet 8, 13, 14, 21 and 27
- C.I. Disperse Violet 1 and basic dyes such as C.I. Basic Red 1, 2, 9, 12, 13, 14, 15, 17,
- the colloid of the hardly water-soluble metal hydroxide used in the present invention preferably has number particle diameter distributions, D 50 (50% cumulative value of number particle diameter distribution) of at most 0.5 ⁇ m and D 90 (90% cumulative value of number particle diameter distribution) of at most 1 ⁇ m. If the particle diameter of the colloid is too great, the stability of the suspension polymerization is broken, and the shelf stability of the resulting polymerized toner is deteriorated.
- additives such as a molecular weight modifier may be used by mixing them with the polymerizable monomer for core.
- a lubricant such as oleic acid or stearic acid; a dispersion aid such as a silane or titanium coupling agent; and/or the like may also be used with a view toward uniformly dispersing the colorant in the core particles.
- a lubricant or dispersion aid is generally used in a proportion of about 1/1,000 to 1/1 based on the weight of the colorant.
- the polymerizable monomer for shell used in the present invention is such that can form a polymer having a glass transition temperature higher than that of the polymer component making up the core particles.
- a difference in Tg between the polymer obtained by the polymerizable monomer for shell and the polymer component making up the core particles is relative.
- the particle diameters of the core particles and the thickness of the shell are difficult to observe through the electron microscope, the particle diameters of the core particles are measured through the electron microscope in the same manner as described above or by means of a Coulter counter at the stage of formation of the core particles. After the core particles are then covered with the shell, the particle diameters of the resultant polymerized toner particles are measured again through the electron microscope or by means of the Coulter counter, whereby the average thickness of the shell can be found from changes in particle diameter before and after the covering with the shell. When it is difficult to measure the shell thickness by these methods, the thickness of the shell can be calculated out from the particle diameter of the core particles and the used amount of the polymerizable monomer for forming the shell.
- An image forming apparatus to which the polymerized toner according to the present invention is applied, comprises a photosensitive member (photosensitive drum), a means for charging the surface of the photosensitive member, a means for forming an electrostatic latent image on the surface of the photosensitive member, a means for receiving a toner (developer), a means for supplying the toner to develop the electrostatic latent image on the surface of the photosensitive member, thereby forming a toner image, and a means for transferring the toner image from the surface of the photosensitive member to a transfer medium.
- a photosensitive member photosensitive drum
- a means for charging the surface of the photosensitive member a means for forming an electrostatic latent image on the surface of the photosensitive member
- a means for receiving a toner (developer) a means for supplying the toner to develop the electrostatic latent image on the surface of the photosensitive member, thereby forming a toner image
- a commercially available printer (4 papers per minute printer) of a non-magnetic one-component development system was modified in such a manner that the temperature of a fixing roll can be varied.
- This modified printer was used to form an image with each toner sample, thereby evaluating the toner as to the image.
- a temperature at which a fixing rate of the toner amounted to 80% was defined as a fixing temperature.
- the fixing test was conducted by varying the temperature of the fixing roll in the printer to determine the fixing rate at each temperature, thereby finding a relationship between the temperature and the fixing rate.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Developing Agents For Electrophotography (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08106032A EP2042932A1 (en) | 1996-11-06 | 1997-10-31 | Polymerized toner and production process thereof |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP31009196 | 1996-11-06 | ||
JP31009196 | 1996-11-06 | ||
PCT/JP1997/003972 WO1998020396A1 (fr) | 1996-11-06 | 1997-10-31 | Toner a base de polymere et procede de production de ce dernier |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08106032A Division EP2042932A1 (en) | 1996-11-06 | 1997-10-31 | Polymerized toner and production process thereof |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0952495A1 EP0952495A1 (en) | 1999-10-27 |
EP0952495A4 EP0952495A4 (en) | 2000-05-10 |
EP0952495B1 true EP0952495B1 (en) | 2009-01-14 |
Family
ID=18001080
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08106032A Withdrawn EP2042932A1 (en) | 1996-11-06 | 1997-10-31 | Polymerized toner and production process thereof |
EP97909708A Expired - Lifetime EP0952495B1 (en) | 1996-11-06 | 1997-10-31 | Encapsulated toner and its production process |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08106032A Withdrawn EP2042932A1 (en) | 1996-11-06 | 1997-10-31 | Polymerized toner and production process thereof |
Country Status (5)
Country | Link |
---|---|
EP (2) | EP2042932A1 (ko) |
JP (1) | JP3670667B2 (ko) |
KR (1) | KR100533491B1 (ko) |
DE (1) | DE69739222D1 (ko) |
WO (1) | WO1998020396A1 (ko) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1197804B1 (en) * | 1999-06-28 | 2006-06-07 | Nippon Zeon Co., Ltd. | Toner for developing static charge image and method for preparation thereof |
JP2002338856A (ja) * | 2001-05-16 | 2002-11-27 | Konica Corp | 色材含有微粒子及びポリマーエマルジョン型水系インク |
CN100383670C (zh) | 2002-12-10 | 2008-04-23 | 松下电器产业株式会社 | 调色剂 |
KR100659456B1 (ko) | 2003-04-08 | 2006-12-18 | 주식회사 엘지화학 | 이중막 또는 삼중막 구조를 갖는 토너 |
EP1645916B1 (en) * | 2004-10-05 | 2012-02-29 | Konica Minolta Business Technologies, Inc. | Electrostatic charge image developing toner |
KR100662914B1 (ko) * | 2004-12-16 | 2007-01-02 | 삼성전자주식회사 | 토너 조성물의 제조 방법 |
JP2006215411A (ja) * | 2005-02-04 | 2006-08-17 | Nippon Zeon Co Ltd | 静電荷像現像用トナー |
KR100708169B1 (ko) * | 2005-07-27 | 2007-04-16 | 삼성전자주식회사 | 토너의 제조방법 및 이를 이용하여 제조된 토너 |
KR100727984B1 (ko) * | 2005-09-24 | 2007-06-13 | 삼성전자주식회사 | 토너의 제조방법 및 이를 이용하여 제조된 토너 |
JP2007121404A (ja) * | 2005-10-25 | 2007-05-17 | Fuji Xerox Co Ltd | 静電荷像現像用トナー、並びに、これを用いた静電荷像現像剤および画像形成方法 |
KR100703972B1 (ko) * | 2006-01-10 | 2007-04-09 | 주식회사 씨아이티 | 중합 토너와 그 제조방법 |
EP2287673B1 (en) | 2008-05-28 | 2013-09-25 | Canon Kabushiki Kaisha | Toner |
JP5445920B2 (ja) * | 2009-08-28 | 2014-03-19 | 株式会社リコー | 静電荷像現像剤用トナー |
JP5361984B2 (ja) * | 2011-12-27 | 2013-12-04 | キヤノン株式会社 | 磁性トナー |
US20170075241A1 (en) | 2015-09-14 | 2017-03-16 | King Abdulaziz City For Science And Technology | POLYMERIZED TONER MATERIAL COMPRISING SILICON (Si) NANOPARTICLES AND PROCESS FOR ITS PREPARATION |
JP7183679B2 (ja) * | 2018-10-10 | 2022-12-06 | 日本ゼオン株式会社 | 重合トナーの製造方法 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1007918A (en) * | 1971-12-14 | 1977-04-05 | Joseph H. Moriconi | Developer material |
CA1122460A (en) * | 1977-05-18 | 1982-04-27 | James W. Consaul | Electrographic developer comprising a free-flowing non-aqueous liquid-containing powder composition |
JPS5494035A (en) * | 1977-11-17 | 1979-07-25 | Canon Inc | Developing toner and method |
JPS57179860A (en) * | 1981-04-30 | 1982-11-05 | Fuji Photo Film Co Ltd | Capsulate toner |
GB2109572B (en) * | 1981-10-09 | 1985-04-24 | Konishiroku Photo Ind | Encapsulated toner for development of electrostatic images |
JPH03136065A (ja) | 1989-10-23 | 1991-06-10 | Kao Corp | 静電荷像現像用トナー及びその製造方法 |
JPH04342264A (ja) * | 1991-05-20 | 1992-11-27 | Kao Corp | 熱圧力定着用カプセルトナー |
EP0514843A1 (en) * | 1991-05-20 | 1992-11-25 | Kao Corporation | Encapsulated toner for heat and-pressure fixing |
US5275903A (en) * | 1992-05-07 | 1994-01-04 | Xerox Corporation | Modified thermotropic liquid crystalline compositions |
US5536612A (en) | 1993-03-10 | 1996-07-16 | Kao Corporation | Encapsulated toner for heat-and-pressure fixing and method for production thereof |
DE69611569T2 (de) * | 1995-05-19 | 2001-06-28 | Canon K.K., Tokio/Tokyo | Toner für die Entwicklung elektrostatischer Bilder, sowie Verfahren zu ihrer Herstellung |
-
1997
- 1997-10-31 EP EP08106032A patent/EP2042932A1/en not_active Withdrawn
- 1997-10-31 DE DE69739222T patent/DE69739222D1/de not_active Expired - Lifetime
- 1997-10-31 WO PCT/JP1997/003972 patent/WO1998020396A1/ja active IP Right Grant
- 1997-10-31 JP JP52121298A patent/JP3670667B2/ja not_active Expired - Lifetime
- 1997-10-31 EP EP97909708A patent/EP0952495B1/en not_active Expired - Lifetime
- 1997-10-31 KR KR10-1999-7003934A patent/KR100533491B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE69739222D1 (de) | 2009-03-05 |
WO1998020396A1 (fr) | 1998-05-14 |
KR20000053037A (ko) | 2000-08-25 |
KR100533491B1 (ko) | 2005-12-06 |
EP2042932A1 (en) | 2009-04-01 |
EP0952495A1 (en) | 1999-10-27 |
EP0952495A4 (en) | 2000-05-10 |
JP3670667B2 (ja) | 2005-07-13 |
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