JPH0327052A - Developer for electrostatic charge image - Google Patents
Developer for electrostatic charge imageInfo
- Publication number
- JPH0327052A JPH0327052A JP1162016A JP16201689A JPH0327052A JP H0327052 A JPH0327052 A JP H0327052A JP 1162016 A JP1162016 A JP 1162016A JP 16201689 A JP16201689 A JP 16201689A JP H0327052 A JPH0327052 A JP H0327052A
- Authority
- JP
- Japan
- Prior art keywords
- developer
- ferrite powder
- resin
- toner
- powder coated
- 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.)
- Granted
Links
- 229920002050 silicone resin Polymers 0.000 claims abstract description 27
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 22
- 239000000843 powder Substances 0.000 claims abstract description 20
- 229920005989 resin Polymers 0.000 claims abstract description 15
- 239000011347 resin Substances 0.000 claims abstract description 15
- LAQFLZHBVPULPL-UHFFFAOYSA-N methyl(phenyl)silicon Chemical compound C[Si]C1=CC=CC=C1 LAQFLZHBVPULPL-UHFFFAOYSA-N 0.000 claims abstract description 14
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 10
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims abstract description 7
- 239000003086 colorant Substances 0.000 claims abstract description 6
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 claims abstract description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 12
- 125000004432 carbon atom Chemical group C* 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims 1
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 abstract description 4
- 239000000969 carrier Substances 0.000 abstract description 4
- 238000002156 mixing Methods 0.000 abstract description 3
- 239000006229 carbon black Substances 0.000 abstract description 2
- 230000006866 deterioration Effects 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 108091008695 photoreceptors Proteins 0.000 description 3
- CJPQIRJHIZUAQP-MRXNPFEDSA-N benalaxyl-M Chemical compound CC=1C=CC=C(C)C=1N([C@H](C)C(=O)OC)C(=O)CC1=CC=CC=C1 CJPQIRJHIZUAQP-MRXNPFEDSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229910002012 Aerosil® Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229920006026 co-polymeric resin Polymers 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 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
- 239000004615 ingredient Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 229920001909 styrene-acrylic polymer Polymers 0.000 description 1
Landscapes
- Developing Agents For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
〈従来の技術〉
電子複写機等で使用される現像剤は、その現像工程にお
いて、例えば静電荷像が形成されている感光体等の像担
持体に一旦付着せしめられ、次に転写工程において感光
体から転写紙に転写された後、定着工程においてコピー
紙面に定着される。[Detailed Description of the Invention] <Prior Art> In the development process, a developer used in an electronic copying machine or the like is once attached to an image bearing member such as a photoreceptor on which an electrostatic image is formed. Next, in a transfer step, the image is transferred from the photoreceptor to a transfer paper, and then, in a fixing step, it is fixed on the copy paper surface.
その際、潜像保持面上に形威される静電荷像を現像する
ための現像剤として、キャリアーとトナーとから戒る二
成分系現像剤およびキャリアーを必要としない一戒分系
現像剤（磁性トナー）が知られている。At that time, as a developer for developing the electrostatic charge image formed on the latent image holding surface, a two-component developer consisting of a carrier and a toner, and a one-component developer that does not require a carrier ( (magnetic toner) is known.
そして、従来より現像剤に帯電性を付与するもノトシて
ニグロシン系染料、４級アンモニウム塩等の帯電制御剤
やキャリアのコーティング剤等が知られていた。Charge control agents such as nigrosine dyes and quaternary ammonium salts, carrier coating agents, and the like have been known for imparting chargeability to developers.
く発明が解決しようとする課題〉
しかしながら、これら従来の帯電性付与剤は、帯電性付
与効果は必ずしも満足できるものではなく、適度な帯電
性を環境等によらず安定的に示し、且つその帯電の経時
変化が好ましい形態を示すトナーを得るのは難しく、低
温低湿下、高温高湿下、又は連続複写時にカブリ等、画
像汚れが発生し、或は安定したコピー濃度が得られない
点が問題となっていた。Problems to be Solved by the Invention> However, these conventional chargeability imparting agents do not necessarily have a satisfactory chargeability imparting effect, and they do not have the ability to stably exhibit appropriate chargeability regardless of the environment. It is difficult to obtain a toner that exhibits a favorable change over time, and the problem is that image stains such as fog may occur under low temperature and low humidity conditions, high temperature and high humidity conditions, or during continuous copying, or stable copy density cannot be obtained. It became.
本発明者等はかかる課題を解決すべく鋭意検討した結果
、特定の構造式で示される４級アンモニウム塩を帯電制
御剤として含有せしめたトナーを樹脂コートされたフェ
ライト粉と混合し、且つ該樹脂としてメチルシリコーン
樹脂およびメチルフェニルシリコーン樹脂を併用するこ
とにより、好ましい帯電特性を示し、画質および耐久性
に優れた現像剤が得られることを見出し、本発明に到達
した。As a result of intensive studies to solve this problem, the present inventors mixed a toner containing a quaternary ammonium salt represented by a specific structural formula as a charge control agent with resin-coated ferrite powder, and The present inventors have discovered that by using a methyl silicone resin and a methyl phenyl silicone resin in combination, a developer can be obtained that exhibits preferable charging characteristics and has excellent image quality and durability, and has thus arrived at the present invention.
即ち、本発明の目的は、画質の経時劣化および環境によ
る劣化の少ない、帯電特性に優れた静電荷像現像用現像
剤を提供することにある．〈課題を解決するための手段
〉
しかして、かかる本発明の目的は、少くとも樹脂、着色
剤および下記一般式（１）で表される４級アンモニウム
塩を含むトナー、メチルシリコーン樹脂で被覆されたフ
ェライト粉並びにメチルフェニルシリコーン樹脂で被覆
されたフェライト粉を含有してなる静電荷像現像用現像
剤により容易に達戒される。That is, an object of the present invention is to provide a developer for developing electrostatic images with excellent charging characteristics and less deterioration of image quality over time and environment. <Means for Solving the Problems> Accordingly, the object of the present invention is to provide a toner containing at least a resin, a colorant, and a quaternary ammonium salt represented by the following general formula (1), and a toner coated with a methyl silicone resin. This can be easily achieved by a developer for developing electrostatic images containing ferrite powder coated with methylphenyl silicone resin and ferrite powder coated with methylphenyl silicone resin.
・ ・ ・ （Ｎ
（式中、Ｒｌ は炭素数１〜８のアルキル基を表し、Ｒ
ｔおよびＲｓはそれぞれ炭素数１〜１８のアルキル基を
表し、Ｒ４は炭素数１〜８のアルキル基またはベンジル
基を表す。）
（作 用）
以下、本発明を詳細に説明する。・ ・ ・ (N (wherein, Rl represents an alkyl group having 1 to 8 carbon atoms, and R
t and Rs each represent an alkyl group having 1 to 18 carbon atoms, and R4 represents an alkyl group having 1 to 8 carbon atoms or a benzyl group. ) (Function) The present invention will be explained in detail below.
本発明に用いられる４級アンモニウム塩は前記一般式（
１）で表される通りの４級アンモニウム塩とナフトール
スルホン酸の造塩化合物であって、具体的には例えば下
記の化合物が挙げられる．・ ・ ・（１）
・ ・ ・（４）
・ ・ ・（２）
・ ・ ・（３）
本発明に、使用し得る樹脂戒分としては、静電荷像現像
用のトナーに適した公知の種々のものが使用できる．例
えば、スチレン系樹脂、スチレンアクリル系共重合樹脂
、ポリエステル系樹脂、エボキシ系樹脂及びこれらの混
合樹脂、また、これらのアルキル側鎖にアξノ基を有す
るもの等があるが、中でもスチレン系又はポリエステル
系の樹脂が好ましい．
トナー中の一般式（Ｉ）で表される化合物の含有量は、
樹脂１００重量部に対して０． １〜１０重量部、より
好ましくは１〜３重量部とするのが好適である。The quaternary ammonium salt used in the present invention has the general formula (
Salt-forming compounds of quaternary ammonium salt and naphtholsulfonic acid as represented by 1) include, for example, the following compounds.・ ・ ・ (1) ・ ・ ・ (4) ・ ・ ・ (2) ・ ・ ・ ・ (3) As the resin compound that can be used in the present invention, there are various known resins suitable for toners for developing electrostatic images. You can use the following. For example, there are styrene resins, styrene-acrylic copolymer resins, polyester resins, epoxy resins, and mixed resins thereof, as well as those having an aξ group in their alkyl side chains. Polyester resin is preferred. The content of the compound represented by general formula (I) in the toner is:
0.0% per 100 parts by weight of resin. The amount is preferably 1 to 10 parts by weight, more preferably 1 to 3 parts by weight.
本発明で用いる着色剤としては、従来から各色のトナー
に用いられているものであれば特に制限されるものでは
なく、黒色トナーの場合にはカーボンブラック等を使用
する。The colorant used in the present invention is not particularly limited as long as it has been conventionally used in toners of various colors, and in the case of black toner, carbon black or the like is used.
着色剤の含有率は、樹脂１００重量部に対して３〜２０
重量部とするのが好ましい．
更に、本発明現像剤のトナーには、一般式（１）で表さ
れる化合物とは別に、公知のものを含めて他の帯電制御
剤、即ち、例えばポリアミン樹脂および／又はニグロシ
ン系染料等を含有せしめてもよい．
その他、本発明現像剤のトナー構戒戒分として、定着性
や流動性を向上させるため、低分子量オレフィン重合体
や微粉末シリカ等の添加剤を含有せしめてもよい。The content of the colorant is 3 to 20 parts by weight per 100 parts by weight of the resin.
It is preferable to use parts by weight. Furthermore, in addition to the compound represented by the general formula (1), the toner of the developer of the present invention may contain other charge control agents, including known ones, such as polyamine resins and/or nigrosine dyes. It may also be included. In addition, additives such as low molecular weight olefin polymers and finely powdered silica may be added to the toner composition of the developer of the present invention in order to improve fixing properties and fluidity.
トナーの製造法としては、上記の各戒分を二−ダー等で
混練し冷却後、粉砕し分級すればよい。The toner may be produced by kneading the above-mentioned ingredients in a seconder or the like, cooling, pulverizing and classifying.
トナーの平均粒径は５〜２０μｍが好適である。The average particle size of the toner is preferably 5 to 20 μm.
本発明現像剤は、上記の様に製造されたトナーを、表面
を被覆するシリコーン系樹脂の種類の異なる２種類のキ
ャリアーと混合して使用することが特徴である．
即ち、シリコーン樹脂は、ケイ素原子がシロキサン結合
を介して互いに結合し、網目状に伸び広がった巨大分子
からなり、該巨大分子の表面の、シロキサン結合を介し
て他の３以下のケイ素原子としか結合していないケイ素
原子は、通常水酸基を有しているが、この水酸基の少な
くとも一部がメチル基、またはメチル基およびフエニル
基と置き換わってなる樹脂をそれぞれメチルシリコーン
樹脂およびメチルフェニルシリコーン樹脂と称する．
本発明現像剤に用いるキャリアーは、少なくともメチル
シリコーン樹脂で被覆されたフェライト粉とメチルフェ
ニルシリコーン樹脂で被覆されたフェライト粉の両方を
含む．キャリアーの粒径には特に制限はないが１０〜２
００ｕｍの平均粒径を有するフェライトが好ましい。こ
れらキャリアーは、トナー１重量部に対して、５〜１０
０重量部使用することが好ましく、このうちメチルフェ
ニルシリコーン樹脂で被覆されたフェライトを全キャリ
アー中５〜５０ｗｔ％、より好ましくはｌＯ〜３０ｗｔ
％とするのが好適である．〈実施例〉
以下、実施例により本発明を更に詳細に説明するが本発
明はその要旨を超えない限り以下の実施例によりなんら
制限されるもΦではない．なお、下記実施例中単に「部
」とあるのはいずれも「重量部」を意味するものとする
．（実施例ｌ）
を配合、混線、粉砕し分級して平均粒径１１μｍの黒色
トナーを得た。この黒色トナー１００部に対してシリカ
粉末（日本アエロジル■製Ｒ一９７２）０．２部をヘン
シェルミキサーにて外添処理した。得られたトナー４部
と平均粒径約１００μｍのメチルシリコーン樹脂で被覆
されたフェライト粉５０部とメチルフェニルシリコーン
樹脂で被覆されたフェライト粉５０部を混合、撹拌し、
現像剤を作製した．
次に、この現像剤について、有機光導電体を感光体とす
る複写機を用いて４０″Ｃ／８５〜９０％の高温／高湿
条件でｉｏｏｏｏｏ枚の実写テストを実施した．
実写テストに使用した補給用トナーは、上記現像剤に用
いられたトナーと同一組底物のトナーである。The developer of the present invention is characterized in that the toner produced as described above is mixed with two types of carriers having different types of silicone resins for coating the surface. That is, silicone resin consists of a macromolecule in which silicon atoms are bonded to each other via siloxane bonds and spread out in a network, and the silicone resin is composed of a macromolecule in which silicon atoms are bonded to each other through siloxane bonds and are spread out in a network. Non-bonded silicon atoms usually have hydroxyl groups, and resins in which at least a portion of these hydroxyl groups are replaced with methyl groups, or methyl groups and phenyl groups are called methyl silicone resins and methylphenyl silicone resins, respectively. ．． The carrier used in the developer of the present invention contains at least both ferrite powder coated with methyl silicone resin and ferrite powder coated with methyl phenyl silicone resin. There is no particular limit to the particle size of the carrier, but it is between 10 and 2.
Ferrites with an average grain size of 00 um are preferred. These carriers may be used in an amount of 5 to 10 parts per part by weight of toner.
It is preferable to use 0 part by weight of the ferrite coated with methylphenyl silicone resin, and 5 to 50 wt% of the total carrier, more preferably 10 to 30 wt% of the ferrite coated with methylphenyl silicone resin.
It is preferable to set it as %. <Examples> Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited in any way by the following Examples unless it exceeds the gist thereof. In addition, in the examples below, the term "parts" simply means "parts by weight." (Example 1) A black toner having an average particle size of 11 μm was obtained by blending, mixing, crushing and classifying. To 100 parts of this black toner, 0.2 parts of silica powder (R-1972, manufactured by Nippon Aerosil ■) was externally added using a Henschel mixer. 4 parts of the obtained toner, 50 parts of ferrite powder coated with methyl silicone resin having an average particle diameter of about 100 μm, and 50 parts of ferrite powder coated with methyl phenyl silicone resin were mixed and stirred,
A developer was created. Next, using this developer, a photocopying machine using an organic photoconductor as a photoreceptor was used to conduct a photocopy test on iooooo sheets at 40''C/85% to 90% high temperature/humidity conditions.Used for photocopying test. The replenishment toner is of the same type as the toner used in the developer.
実写テストの結果、ｉｏｏｏｏｏ枚後の実写も、コピー
の白地部の汚れであるカブリの増加がなく、又コビー黒
色部の均一性及び濃度も高く高温高湿度下の厳しい環境
下でも耐久性に優れたトナー及び現像剤であった。As a result of the live copy test, even after iooooo copying, there is no increase in fog, which is dirt on the white background of the copy, and the uniformity and density of the black areas are high, making it highly durable even in harsh environments of high temperature and high humidity. These were toner and developer.
（実施例−２）
メチルシリコーン樹脂で被覆されたフェライト粉と、メ
チルフェニルシリコーン樹脂で被覆されたフェライト粉
の使用量をそれぞれ９０部と１０部とした以外は、前記
実施例１と全く同様にして現像剤を作製し、１００００
０枚の実写テストを実施したところ、カブリの増加のな
い又、コピーの黒地部の均一性及び濃度も高く耐久性に
優れた現像剤であった。(Example 2) The procedure was exactly the same as in Example 1 except that the amounts of ferrite powder coated with methyl silicone resin and ferrite powder coated with methyl phenyl silicone resin were 90 parts and 10 parts, respectively. A developer was prepared and 10,000
When a photocopying test was carried out on 0 sheets, it was found that the developer exhibited no increase in fog, had high uniformity and density in black areas of copies, and was excellent in durability.
（実施例−３）
メチルシリコーン樹脂で被覆されたフェライト粉と、メ
チルフェニルシリコーン樹脂で被覆されたフェライト粉
の使用量をそれぞれ１０部と９０部とした以外は、前記
実施例１と全く同様にして現像剤を作製し、ＩＯＯＯＪ
）０枚の実写テストを実施したところ、カプリの増加の
ない又、コピーの黒地部の均一性及び濃度も高く耐久性
に優れた現像剤であった。(Example 3) The same procedure as in Example 1 was carried out except that the amounts of ferrite powder coated with methyl silicone resin and ferrite powder coated with methyl phenyl silicone resin were 10 parts and 90 parts, respectively. Make a developer and use IOOOJ
) When a photocopying test was carried out on 0 sheets, it was found that the developer exhibited no increase in capri, had high uniformity and density in black areas of copies, and was excellent in durability.
（比較例−１）
メチルフェニルシリコーン樹脂で被覆されたフェライト
粉の使用量を１００部とし、メチルシリコーン樹脂で被
覆されたフェライト粉を使用しなかった以外は、前記実
施例−１と全く同様に現像剤を作製し、ｉｏｏｏｏｏ枚
の実写テストを実施したが、１０００枚付近より白地部
の汚れ、すなわちカブリが上昇し、又黒地部にハケスジ
が発生し、濃度が低下し、使用に問題がある現像剤であ
った。(Comparative Example-1) Same as Example-1 except that the amount of ferrite powder coated with methylphenyl silicone resin was 100 parts and the ferrite powder coated with methyl silicone resin was not used. I made a developer and conducted a live-action test on ioooooo sheets, but from around 1000 sheets, the dirt on the white background area, that is, fog, increased, and the black background area had brush lines, and the density decreased, causing problems in use. It was a developer.
（比較例−２）
メチルシリコーン樹脂で被覆されたフェライト粉の使用
量をｌＯＯ部とし、メチルフェニルシリコーン樹脂で被
覆されたフェライト粉を使用しなかった以外は、前記実
施例−１と全く同様に現像剤を作製し、１０００００枚
の実写を実施したが、１０００枚付近よりカプリの上昇
及びコピー濃度の低下や黒地部にハケスジが発生し使用
に問題がある現像剤であった。(Comparative Example-2) The same procedure as in Example-1 was carried out, except that the amount of ferrite powder coated with methyl silicone resin was 100 parts, and the ferrite powder coated with methyl phenyl silicone resin was not used. A developer was prepared and 100,000 sheets were copied, but the developer had problems in use, as the capri increased, the copy density decreased, and scratches appeared in the black background area from around 1,000 sheets.
く発明の効果〉
本発明の静電荷像現像用トナーは常に適度で且つ安定し
た帯電性を示す等帯電性能が良好で、従来問題となって
いた高温高温、低温低湿下或は連続複写時のコピー汚れ
や画像濃度の低下が少ない等使用条件に係わらず良好な
画像を与え、多大な工業的利益を提供するものである。Effects of the Invention The toner for developing electrostatic images of the present invention has good charging performance, always exhibiting appropriate and stable charging properties, and is resistant to the conventional problems of high temperature, high temperature, low temperature and low humidity, or during continuous copying. It provides a good image regardless of the conditions of use, such as less copy staining and lowering of image density, and provides great industrial benefits.
Claims (1)
）で表される４級アンモニウム塩を含むトナー、メチル
シリコーン樹脂で被覆されたフェライト粉並びにメチル
フェニルシリコーン樹脂で被覆されたフェライト粉を含
有してなる静電荷像現像用現像剤。 ▲数式、化学式、表等があります▼・・・〔 I 〕 （式中、Ｒ＾１は炭素数１〜８のアルキル基を表し、Ｒ
＾２およびＲ＾３はそれぞれ炭素数１〜１８のアルキル
基を表し、Ｒ＾４は炭素数１〜８のアルキル基またはベ
ンジル基を表す。）(1) At least a resin, a colorant and the following general formula (I
) A developer for developing an electrostatic image, comprising a toner containing a quaternary ammonium salt represented by the following formula, ferrite powder coated with methyl silicone resin, and ferrite powder coated with methyl phenyl silicone resin. ▲There are mathematical formulas, chemical formulas, tables, etc.▼...[I] (In the formula, R^1 represents an alkyl group having 1 to 8 carbon atoms, and R
^2 and R^3 each represent an alkyl group having 1 to 18 carbon atoms, and R^4 represents an alkyl group having 1 to 8 carbon atoms or a benzyl group. )
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1162016A JP2794797B2 (en) | 1989-06-23 | 1989-06-23 | Developer for developing electrostatic images |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1162016A JP2794797B2 (en) | 1989-06-23 | 1989-06-23 | Developer for developing electrostatic images |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0327052A true JPH0327052A (en) | 1991-02-05 |
| JP2794797B2 JP2794797B2 (en) | 1998-09-10 |
Family
ID=15746451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1162016A Expired - Lifetime JP2794797B2 (en) | 1989-06-23 | 1989-06-23 | Developer for developing electrostatic images |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2794797B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04328758A (en) * | 1991-04-30 | 1992-11-17 | Mitsubishi Kasei Corp | Developer for developing electrostatic charge image |
| US6562536B2 (en) | 2000-10-30 | 2003-05-13 | Dainippon Ink And Chemicals, Inc. | Charge-controlling agent and toner using the same |
-
1989
- 1989-06-23 JP JP1162016A patent/JP2794797B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04328758A (en) * | 1991-04-30 | 1992-11-17 | Mitsubishi Kasei Corp | Developer for developing electrostatic charge image |
| US6562536B2 (en) | 2000-10-30 | 2003-05-13 | Dainippon Ink And Chemicals, Inc. | Charge-controlling agent and toner using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2794797B2 (en) | 1998-09-10 |
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