JPH0210421B2 - - Google Patents
Info
- Publication number
- JPH0210421B2 JPH0210421B2 JP59069182A JP6918284A JPH0210421B2 JP H0210421 B2 JPH0210421 B2 JP H0210421B2 JP 59069182 A JP59069182 A JP 59069182A JP 6918284 A JP6918284 A JP 6918284A JP H0210421 B2 JPH0210421 B2 JP H0210421B2
- Authority
- JP
- Japan
- Prior art keywords
- cooh
- carrier
- present
- coating material
- core material
- 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
- 239000011162 core material Substances 0.000 claims description 16
- 125000005010 perfluoroalkyl group Chemical group 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 6
- 229920002050 silicone resin Polymers 0.000 claims description 5
- 150000001732 carboxylic acid derivatives Chemical group 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 claims description 2
- 125000001183 hydrocarbyl group Chemical group 0.000 claims 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 17
- 239000000463 material Substances 0.000 description 16
- 239000011248 coating agent Substances 0.000 description 15
- 238000000576 coating method Methods 0.000 description 15
- 239000002245 particle Substances 0.000 description 15
- 239000000969 carrier Substances 0.000 description 9
- 229910000859 α-Fe Inorganic materials 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- -1 polymethylphenylsiloxane Polymers 0.000 description 4
- 239000000126 substance Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002430 hydrocarbons Chemical group 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 108091008695 photoreceptors Proteins 0.000 description 2
- 150000003755 zirconium compounds Chemical class 0.000 description 2
- 229910003962 NiZn Inorganic materials 0.000 description 1
- 229910018605 Ni—Zn Inorganic materials 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- SOGAXMICEFXMKE-UHFFFAOYSA-N alpha-Methyl-n-butyl acrylate Natural products CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- UOCJDOLVGGIYIQ-PBFPGSCMSA-N cefatrizine Chemical group S([C@@H]1[C@@H](C(N1C=1C(O)=O)=O)NC(=O)[C@H](N)C=2C=CC(O)=CC=2)CC=1CSC=1C=NNN=1 UOCJDOLVGGIYIQ-PBFPGSCMSA-N 0.000 description 1
- 229940090961 chromium dioxide Drugs 0.000 description 1
- IAQWMWUKBQPOIY-UHFFFAOYSA-N chromium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Cr+4] IAQWMWUKBQPOIY-UHFFFAOYSA-N 0.000 description 1
- AYTAKQFHWFYBMA-UHFFFAOYSA-N chromium(IV) oxide Inorganic materials O=[Cr]=O AYTAKQFHWFYBMA-UHFFFAOYSA-N 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000004807 desolvation Methods 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 229920001921 poly-methyl-phenyl-siloxane Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000007794 visualization technique Methods 0.000 description 1
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
- G03G9/10—Developers with toner particles characterised by carrier particles
- G03G9/113—Developers with toner particles characterised by carrier particles having coatings applied thereto
- G03G9/1138—Non-macromolecular organic components of coatings
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Developing Agents For Electrophotography (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は電子写真法、静電記録法において静電
潜像の現像に用いられる静電荷像現像用キヤリヤ
粒子、更に詳細には、コアと被覆樹脂からなる高
耐久性を有する静電荷現像用キヤリヤ粒子に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to carrier particles for developing electrostatic latent images used in electrophotography and electrostatic recording, and more particularly to carrier particles for developing electrostatic latent images in electrophotography and electrostatic recording. This invention relates to carrier particles for electrostatic charge development having high durability.
従来技術
電子写真法においては、セレンをはじめとする
光導電性物質を感光体として用い、種々の手段に
より電気的潜像を形成し、この潜像に磁気ブラシ
現像法等を用いてトナーを付着、顕像化させる方
式が一般的に用いられている。Prior Art In electrophotography, a photoconductive substance such as selenium is used as a photoreceptor, an electrical latent image is formed by various means, and toner is attached to this latent image using a magnetic brush development method. , a visualization method is generally used.
この現像工程において、トナーに適当量の正ま
たは負の電気量を付与する為にキヤリヤと呼ばれ
る担体粒子が用いられる。キヤリヤは大別して、
コートキヤリヤと非コートキヤリヤがあるが、現
像剤寿命等を考慮した場合、コートキヤリヤの方
が優れており、種々のタイプのコートキヤリヤが
実用化されている。このコートキヤリヤに要求さ
れる特性は種々あるが、特に重要な特性として、
適当な帯電性、耐衝撃、耐摩耗性、コア（芯物
質）と被覆材料との良好な密着性等が挙げられ
る。 In this development step, carrier particles called carriers are used to impart an appropriate amount of positive or negative electricity to the toner. Carriers can be broadly classified into
There are coated carriers and non-coated carriers, but coated carriers are superior in terms of developer life, etc., and various types of coated carriers have been put into practical use. There are various properties required for this coat carrier, but the most important properties are:
Examples include appropriate charging properties, impact resistance, abrasion resistance, and good adhesion between the core (core material) and the coating material.
上記要求特性を考慮すると、従来用いられてい
るコートキヤリヤは不適格なものが多いと言わざ
るを得ない。すなわち、上記要求特性を全て満足
する被覆材料は未だ見出されておらず、例えば、
フツ素化ビニルポリマー類は帯電性に優れるが、
コアとの密着性に欠け、アクリル系ポリマー類は
強度、密着性は満足できるものの、帯電性に劣る
傾向にあるという様に、一長一短を有する被覆材
料を使いこなしているのが現状である。 Considering the above-mentioned required characteristics, it must be said that many of the coat carriers conventionally used are unsuitable. That is, a coating material that satisfies all of the above-mentioned required properties has not yet been found; for example,
Fluorinated vinyl polymers have excellent charging properties, but
Currently, we are using coating materials that have advantages and disadvantages, such as lacking adhesion to the core, and acrylic polymers, although satisfactory in strength and adhesion, tend to have poor charging properties.
上記の如く静電荷像現像用に用いられる改良さ
れたキヤリヤ粒子が依然として要望されている。 As noted above, there remains a need for improved carrier particles for use in electrostatic image development.
発明の目的
従つて本発明の目的は上記の欠点を克服した静
電荷像現像用キヤリヤ粒子を提供することにあ
る。OBJECTS OF THE INVENTION It is therefore an object of the present invention to provide carrier particles for developing electrostatic images which overcome the above-mentioned disadvantages.
即ち、本発明の目的はトナーとの摩擦帯電によ
り優れた帯電性を示す静電荷像現像用キヤリヤ粒
子を提供することにある。 That is, an object of the present invention is to provide carrier particles for developing electrostatic images that exhibit excellent charging properties due to frictional charging with toner.
本発明の他の目的は充分な耐衝撃性、耐摩耗性
を有する静電荷像現像用キヤリヤ粒子を提供する
ことにある。 Another object of the present invention is to provide carrier particles for developing electrostatic images having sufficient impact resistance and abrasion resistance.
本発明の他の目的はコアとの密着性が良好で、
はがれ等を生じない静電荷像現像用キヤリヤ粒子
を提供することにある。 Another object of the present invention is to have good adhesion to the core;
An object of the present invention is to provide carrier particles for developing electrostatic images that do not cause peeling or the like.
さらに本発明の他の目的は、初期および長期使
用時において良好な画像を得ることができる静電
荷像現像用キヤリヤ粒子を提供することにある。 Yet another object of the present invention is to provide carrier particles for developing electrostatic images that can provide good images both initially and during long-term use.
発明の構成
前記目的を達成する為、本発明者等は鋭意研究
し、シリコン樹脂および下記一般式で示される化
合物とからなる被覆材料を用いたことを特徴とす
る静電荷現像用キヤリヤ粒子が著しく優れた特性
を有することを見出し、本発明を完成した。Composition of the Invention In order to achieve the above-mentioned object, the present inventors have made extensive research and have developed carrier particles for electrostatic charge development which are characterized by using a coating material consisting of a silicone resin and a compound represented by the following general formula. They discovered that it has excellent properties and completed the present invention.
（RO）oZr（Ｘ）4-o
式中、ｎは０〜３の正数、Ｒは炭化水素基又は
置換炭化水素基、Ｘは分子中とパーフロロアルキ
ル基を有するカルボン酸残基を示す。 (RO) o Zr(X) 4-o In the formula, n is a positive number from 0 to 3, R is a hydrocarbon group or a substituted hydrocarbon group, and X is a carboxylic acid residue having a perfluoroalkyl group in the molecule. show.
シリコン樹脂とこのジルコニウム化合物の混合
比は100対0.1〜30重量比、より望ましくは100対
１〜10重量比程度で、これらを混合したキヤリヤ
被覆材料はキヤリヤコアに対し0.1〜5.0重量％、
より望ましくは0.3〜2.5重量％程度被覆せしめ
る。 The mixing ratio of silicone resin and this zirconium compound is about 100:0.1 to 30 weight ratio, more preferably about 100:1 to 10 weight ratio, and the carrier coating material mixed with these is 0.1 to 5.0 weight% of the carrier core.
More preferably, the coating is about 0.3 to 2.5% by weight.
シリコン樹脂は、代表的なポリメチルフエニル
シロキサン、ポリジメチルシロキサンの他に、ア
ルキツド樹脂、フエノール樹脂、エポキシ樹脂等
で変性したいわゆる変性シリコンワニスも用いる
ことができる。 As the silicone resin, in addition to typical polymethylphenylsiloxane and polydimethylsiloxane, so-called modified silicone varnishes modified with alkyd resins, phenolic resins, epoxy resins, etc. can also be used.
ジルコニウム化合物において、ＲはＣ＝１〜５
の、メチル、エチル、ｉ―プロピル、ｎ―プロピ
ル、ｎ―ブチル、ｉ―ブチル、ｔ―ブチル、ｎ―
アミル、ｉ―アミル、ｔ―アミル等の低級アルキ
ル基である。Ｘは分子中にパーフロロアルキル基
を含む１又は多価カルボン酸であり、パーフロロ
アルキル基がカルボキシル基に直結している化合
物及びパーフロロアルキル基が他の基を介してカ
ルボキシル基と結合した化合物も用いることがで
きる。パーフロロアルキル基を有するカルボン酸
の例としては、CF3COOH、C2F5COOH、
C3F7COOH、C4F9COOH、C5F11COOH、
C6H13COOH、C7F15COOH、C8F17COOH、
C9F19COOH、C10F21COOH、C11F23COOH、
C18F37COOH、C2F5CO6H4COOH、３，５―
（C2F5O）2C6H3COOH、３，４，５―
（C2F5O）3C6H2COOH、C6F11OC6H4COOH、
C2F17OC6H4COOH、C9F19OC6H4COOH等が挙
げられ、中でもパーフロロアルキル基のアルキル
部分が炭素数３以上のものが表面張力の低下能力
が大きく好ましく用いられる。 In the zirconium compound, R is C=1-5
, methyl, ethyl, i-propyl, n-propyl, n-butyl, i-butyl, t-butyl, n-
It is a lower alkyl group such as amyl, i-amyl, t-amyl, etc. X is a mono- or polyhydric carboxylic acid containing a perfluoroalkyl group in the molecule, and compounds in which the perfluoroalkyl group is directly bonded to the carboxyl group and compounds in which the perfluoroalkyl group is bonded to the carboxyl group via another group. Compounds can also be used. Examples of carboxylic acids having perfluoroalkyl groups include CF 3 COOH, C 2 F 5 COOH,
C 3 F 7 COOH, C 4 F 9 COOH, C 5 F 11 COOH,
C 6 H 13 COOH, C 7 F 15 COOH, C 8 F 17 COOH,
C 9 F 19 COOH, C 10 F 21 COOH, C 11 F 23 COOH,
C 18 F 37 COOH, C 2 F 5 CO 6 H 4 COOH, 3,5-
(C 2 F 5 O) 2 C 6 H 3 COOH, 3,4,5-
(C 2 F 5 O) 3 C 6 H 2 COOH, C 6 F 11 OC 6 H 4 COOH,
Examples include C 2 F 17 OC 6 H 4 COOH, C 9 F 19 OC 6 H 4 COOH, etc. Among them, those in which the alkyl part of the perfluoroalkyl group has 3 or more carbon atoms are preferably used because of their large ability to lower surface tension. .
本発明に用いるコア材としては、種々公知のも
のを用いることができ、例えば四三酸化鉄、三二
酸化鉄、MnZnフエライト、NiZnフエライト、
Baフエライト、二酸化クロム、鉄、ニツケル、
コバルト、ガラスビーズ等の20〜500μｍ程度の
粒径の粒子である。 As the core material used in the present invention, various known materials can be used, such as triiron tetroxide, iron sesquioxide, MnZn ferrite, NiZn ferrite,
Ba ferrite, chromium dioxide, iron, nickel,
These are particles of cobalt, glass beads, etc. with a particle size of about 20 to 500 μm.
又結着樹脂中に磁性粉を分散した粒子をコア材
として用いても良い。 Further, particles in which magnetic powder is dispersed in a binder resin may be used as the core material.
本発明のキヤリヤ粒子は前述のコア材を前述の
コート材で表面処理し、コア材料表面上に化学結
合あるいは吸着等によりコート材の被覆層を形成
することにより得ることができる。コア材の表面
処理のためには、例えばコート材を溶解した溶液
中にコア材を浸漬し、次いで脱溶媒、乾燥、更に
は高温処理する方法、あるいはコア材を流動化床
中で浮遊させコート材溶液を噴霧塗布して乾燥、
更には高温処理する方法等を利用することができ
る。これら方法で高温処理は必ずしも必要でない
が、密着性を高める点から約100〜200℃で処理す
るのが良い。 The carrier particles of the present invention can be obtained by surface-treating the above-mentioned core material with the above-mentioned coating material and forming a coating layer of the coating material on the surface of the core material by chemical bonding or adsorption. For surface treatment of the core material, for example, the core material is immersed in a solution in which the coating material is dissolved, followed by desolvation, drying, and high temperature treatment, or the core material is suspended in a fluidized bed and coated. Spray the material solution and dry.
Furthermore, a method of high temperature treatment, etc. can be used. Although high temperature treatment is not necessarily necessary in these methods, it is preferable to perform the treatment at about 100 to 200°C in order to improve adhesion.
この本発明に係るキヤリヤはトナーと混合して
用いられる。トナーとしては種々公知のものが使
用でき、特に制限されない。トナーはキヤリヤ
100重量部に対し１〜20重量部程度混合される。 The carrier according to the present invention is used in combination with a toner. Various known toners can be used and are not particularly limited. Toner is carrier
It is mixed in an amount of about 1 to 20 parts by weight per 100 parts by weight.
このキヤリヤとトナーとからなる現像剤は感光
体あるいは静電記録体に形成された静電潜像を現
像するのに用いられ、磁気ブラシ現像法、カスケ
ード現像法等の種々の現像法を適用できる。 This developer consisting of carrier and toner is used to develop an electrostatic latent image formed on a photoreceptor or electrostatic recording medium, and various developing methods such as magnetic brush development and cascade development can be applied. .
発明の効果
コア材を特定の化合物のコート材で被覆した本
発明のキヤリヤは種々の優れた効果を有する。ま
ず従来のコートキヤリヤに比較して帯電性並びに
電荷分布の均一性に優れており、即ち帯電速度が
著るしく速く、帯電の減衰あるいは蓄積がなく、
これらが温湿度の変化あるいは長期使用に於いて
も安定しており、又電荷分布がシヤープで異極性
の電荷を含むことがない。更にコア材とコート材
との密着性が優れ、コート材がはがれることがな
い。更に特筆すべき点は本発明に係わるコート材
は比較的低抵抗であり、従来のコートキヤリヤに
見られたソリツド部、中間調部の画質劣化を生じ
ることがない。Effects of the Invention The carrier of the present invention, in which the core material is coated with a coating material of a specific compound, has various excellent effects. First, compared to conventional coated carriers, it has superior charging properties and uniformity of charge distribution, that is, the charging speed is significantly faster, and there is no charge decay or accumulation.
These materials are stable even under changes in temperature and humidity or during long-term use, and their charge distribution is sharp and does not contain charges of different polarity. Furthermore, the adhesion between the core material and the coating material is excellent, and the coating material will not peel off. A further noteworthy point is that the coating material according to the present invention has a relatively low resistance, and does not cause the deterioration in image quality in solid areas and halftone areas that occurs in conventional coat carriers.
以下、実施例により本発明を更に具体的に説明
する。 Hereinafter, the present invention will be explained in more detail with reference to Examples.
実施例
フエライトコア（Ni−Znフエライト日本粉製）
100重量部
パーフロロ―ｎ―オクタン酸ジルコニウムトリ
ブトキシド（松本製薬製） 0.05重量部
シリコン樹脂（KR−251信越化学製）
1.0重量部
上記配合にて流動層を用いて、コーテイング操
作を施し、本発明に係るキヤリヤを得た。Example ferrite core (Ni-Zn ferrite made from Japan powder)
100 parts by weight perfluoro-n-octanoic acid zirconium tributoxide (manufactured by Matsumoto Pharmaceutical) 0.05 parts by weight silicone resin (KR-251 manufactured by Shin-Etsu Chemical)
1.0 parts by weight A coating operation was performed using a fluidized bed with the above formulation to obtain a carrier according to the present invention.
このキヤリヤ100重量部に対し、スチレン、ｎ
―ブチルメタクリレート共重合体とカーボンブラ
ツクからなる黒色トナー２重量部を混合したとこ
ろ、帯電速度が著しく速く、かつ帯電分布もシヤ
ープであつた。混合された現像剤を劣化試験機に
かけたところ20時間撹拌後も帯電量及び帯電量分
布に殆んど変化がなく、かつ電顕観察の結果被覆
材料のハガレ等もなく良好な結果を示した。 For 100 parts by weight of this carrier, styrene, n
- When 2 parts by weight of a black toner consisting of a butyl methacrylate copolymer and carbon black was mixed, the charging speed was extremely high and the charging distribution was sharp. When the mixed developer was subjected to a deterioration tester, there was almost no change in the amount of charge and charge amount distribution even after stirring for 20 hours, and electron microscopic observation showed good results with no peeling of the coating material. .
Claims (1)
般式 （RO）oZr（Ｘ）4-o 〔式中、ｎは０〜３の整数、Ｒは炭化水素基又
は置換炭化水素基、Ｘは分子中にパーフロロアル
キル基を有するカルボン酸残基をそれぞれ示す。〕 で示される化合物とを含有する被覆層とを有する
ことを特徴とする静電荷現像用キヤリヤ。[Scope of Claims] 1. A core material, a silicone resin thereon, and the following general formula (RO) o Zr(X) 4-o [wherein, n is an integer of 0 to 3, and R is a hydrocarbon group or a substituted The hydrocarbon group and X each represent a carboxylic acid residue having a perfluoroalkyl group in the molecule. ] A carrier for electrostatic charge development, comprising a coating layer containing a compound represented by the formula:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59069182A JPS60213963A (en) | 1984-04-09 | 1984-04-09 | Carrier for electrostatic charge development |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59069182A JPS60213963A (en) | 1984-04-09 | 1984-04-09 | Carrier for electrostatic charge development |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60213963A JPS60213963A (en) | 1985-10-26 |
| JPH0210421B2 true JPH0210421B2 (en) | 1990-03-08 |
Family
ID=13395322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59069182A Granted JPS60213963A (en) | 1984-04-09 | 1984-04-09 | Carrier for electrostatic charge development |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60213963A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10441794B2 (en) | 2012-12-21 | 2019-10-15 | Backbeat Medical, Inc. | Methods and systems for lowering blood pressure through reduction of ventricle filling |
| US10485658B2 (en) | 2016-04-22 | 2019-11-26 | Backbeat Medical, Inc. | Methods and systems for controlling blood pressure |
-
1984
- 1984-04-09 JP JP59069182A patent/JPS60213963A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10441794B2 (en) | 2012-12-21 | 2019-10-15 | Backbeat Medical, Inc. | Methods and systems for lowering blood pressure through reduction of ventricle filling |
| US10485658B2 (en) | 2016-04-22 | 2019-11-26 | Backbeat Medical, Inc. | Methods and systems for controlling blood pressure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60213963A (en) | 1985-10-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4562136A (en) | Two-component dry-type developer | |
| JPS6411942B2 (en) | ||
| US4657838A (en) | Toner, charge-imparting material and composition containing organotin alkoxide | |
| JPS61110161A (en) | Carrier for electrophotography | |
| JPH05232746A (en) | Electrophotographic carrier particles coated with a polymer mixture | |
| US4486502A (en) | Resin-coated carrier for use in two-component electrophotographic developers | |
| US5200287A (en) | Carrier for developing electrostatic image | |
| JPS5843464A (en) | Charging of replenishing toner | |
| JPH04198946A (en) | Carrier for developing electrostatic latent image | |
| US4503136A (en) | Two-component resin system of acrylic and diene polymers for coating electrophotographic carrier particles | |
| JPS6261948B2 (en) | ||
| JPH0523433B2 (en) | ||
| JP2552139B2 (en) | Resin coated carrier for electrostatic latent image development | |
| JP3541629B2 (en) | Electrostatic charging member for electrostatic charge development and image forming method | |
| JP2907002B2 (en) | Electrostatic latent image developing carrier, method of manufacturing the same, and image forming method | |
| JPS60213963A (en) | Carrier for electrostatic charge development | |
| JPS606953A (en) | Carrier for electrostatic latent image developer | |
| JPH0523432B2 (en) | ||
| JP2576868B2 (en) | Resin-coated carrier for electrostatic latent image development | |
| JPS6217758A (en) | Electrophotographic development method | |
| JPS60213961A (en) | Carrier for electrostatic charge development | |
| JPS61284775A (en) | Carrier particle for electrostatic latent image developer | |
| JPH0736084B2 (en) | Carrier for electrostatic latent image development | |
| JPS6139664B2 (en) | ||
| JPH0642084B2 (en) | Positively chargeable electrophotographic carrier |