JPH09160298A - Electrohpotographic toner electrophotographic, liquid developer and ink for ink jet printing - Google Patents
Electrohpotographic toner electrophotographic, liquid developer and ink for ink jet printingInfo
- Publication number
- JPH09160298A JPH09160298A JP34004795A JP34004795A JPH09160298A JP H09160298 A JPH09160298 A JP H09160298A JP 34004795 A JP34004795 A JP 34004795A JP 34004795 A JP34004795 A JP 34004795A JP H09160298 A JPH09160298 A JP H09160298A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- colorant
- resin
- weight
- alloy
- 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
Landscapes
- Inks, Pencil-Leads, Or Crayons (AREA)
- Ink Jet (AREA)
- Liquid Developers In Electrophotography (AREA)
- Ink Jet Recording Methods And Recording Media Thereof (AREA)
- Developing Agents For Electrophotography (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は電子写真用トナー、
電子写真用液体現像剤、インクジェット記録用インキ等
に関し、詳しくは、これらに好ましく用いられる着色剤
に関する。The present invention relates to an electrophotographic toner,
The present invention relates to a liquid developer for electrophotography, an ink for inkjet recording, and the like, and more specifically, relates to a colorant preferably used for these.
【０００２】[0002]
【従来の技術】従来、静電潜像を現像するための液体現
像剤として、電気抵抗１０10Ωｃｍ以上で誘電率３以下
の高絶縁性液体中に顔料粒子と、この顔料粒子の荷電を
制御し分散性、定着性を付与するための樹脂とを分散し
たものが使用されている。そして通常は、顔料粒子にカ
ーボンブラックなどが使用され、また樹脂にはアルキッ
ド樹脂、アクリル樹脂、天然樹脂などが主として使用さ
れている。しかし、これらの液体現像剤を湿式現像転写
用として使用した場合、転写画像は（１）充分な画像濃
度が得られない、（２）未転写トナーの復元性が良好で
なく耐久性に劣る、（３）連続階調性を再現しにくい、
などの欠点がある。2. Description of the Related Art Conventionally, as a liquid developer for developing an electrostatic latent image, pigment particles and a charge of these pigment particles are controlled in a highly insulating liquid having an electric resistance of 10 10 Ωcm or more and a dielectric constant of 3 or less. However, a resin in which a resin for imparting dispersibility and fixability is dispersed is used. Usually, carbon black or the like is used for the pigment particles, and alkyd resin, acrylic resin, natural resin or the like is mainly used as the resin. However, when these liquid developers are used for wet development transfer, the transferred image is (1) sufficient image density cannot be obtained, and (2) unrestored toner is not good in restoration property and inferior in durability. (3) It is difficult to reproduce continuous gradation.
There are drawbacks such as.
【０００３】また液体現像剤中の顔料粒子の極性を明瞭
にするために次の如き技術も提案されている。例えば
（ａ）顔料粒子にビニルモノマーをグラフトさせたトナ
ーを使用する、（ｂ）高分子色原体例えばジアゾ化合物
を重合開始剤に用いて得られたトナーを使用する、
（ｃ）界面活性剤、例えばナフテン酸コバルト、ナフテ
ン酸ニッケル、ナフテン酸マンガンなどの金属石鹸、ド
デシルベンゼンスルフォン酸カリなどのアルキルベンゼ
ンスルフォン酸塩を用いたトナーを使用する、などであ
る。しかし（ａ）の場合、グラフト化率が低く分散安定
性に問題がある。（ｂ）の場合、極性が不安定で負、正
極性のトナーが混在し易い。（ｃ）の場合、複写機より
発生するオゾンにより酸化作用を受け易く次第に劣化す
る。これらの理由から（ａ）（ｂ）（ｃ）の方法によっ
ても結果的に市販された液体現像剤と同様の転写画像の
欠点を解消するに至っていない。The following techniques have also been proposed to clarify the polarity of pigment particles in a liquid developer. For example, (a) a toner obtained by grafting a vinyl monomer onto pigment particles is used, (b) a toner obtained by using a polymer chromogen such as a diazo compound as a polymerization initiator is used,
(C) A toner using a surfactant, for example, a metal soap such as cobalt naphthenate, nickel naphthenate, or manganese naphthenate, or an alkylbenzene sulfonate such as potassium dodecylbenzenesulfonate is used. However, in the case of (a), the grafting rate is low and there is a problem in dispersion stability. In the case of (b), negative polarity and negative polarity toner are likely to be mixed. In the case of (c), the ozone generated from the copying machine is apt to be oxidized and gradually deteriorates. For these reasons, the methods (a), (b), and (c) have not been able to eliminate the same defects of transferred images as the commercially available liquid developers.
【０００４】更に、特開昭４９−９１７４３号には、電
荷制御剤として高級アルキルアミンまたは四級アンモニ
ウム塩を用いた現像剤で階調再現性を挙げることが示さ
れている。しかし、この現像剤は経時、または濃縮トナ
ーでの保存を長期間行うことによって階調性が低下する
傾向がある。また特開昭５１−２４２３３号には、電子
吸引性の基で置換されたビニルカルバゾール重合体又は
共重合体を含有させることで、及び特開昭５８−５２６
５２号には高級アルコールを添加させることで、いずれ
も繰り返し使用特性のすぐれた液体現像剤を得るように
しているが、これらも上記と同様な問題を残している。
加えて、従来の液体現像剤によったのでは近年のカラー
複写機、またはオンデマンド型電子写真印刷やインクジ
ェット記録などで黄金色を再現させることがなかなか困
難であった。Further, JP-A-49-91743 discloses that a developer using a higher alkylamine or a quaternary ammonium salt as a charge control agent can improve gradation reproducibility. However, the gradation of this developer tends to be deteriorated as it is stored for a long time or in a concentrated toner. Further, JP-A-51-24233 contains a vinyl carbazole polymer or copolymer substituted with an electron-withdrawing group, and JP-A-58-526.
In No. 52, a higher alcohol is added to obtain a liquid developer excellent in repeated use characteristics, but these also have the same problems as described above.
In addition, it has been difficult to reproduce the golden color by a conventional color copying machine, on-demand type electrophotographic printing, ink jet recording or the like by using the conventional liquid developer.
【０００５】[0005]
【発明が解決しようとする課題】本発明の目的は、上記
のような欠点を除去した電子写真用液体現像剤であっ
て、顔料粒子の極性制御再分散性及び転写率を向上させ
て、湿式現像転写用の現像剤として充分な転写画像が得
られ、加えて、連続階調性を再現させるとともに未転写
トナーの復元性を向上させて耐久性を改善することを目
的とする。また本発明は乾式現像方式、インクジェット
記録方式などでも黄金色を忠実に再現させることを目的
とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid developer for electrophotography which eliminates the above-mentioned drawbacks and which improves the polarity control redispersibility and transfer rate of pigment particles and is a wet type. It is an object of the present invention to obtain a transfer image sufficient as a developer for development transfer, in addition to reproduce continuous gradation and improve the resilience of untransferred toner to improve durability. Another object of the present invention is to faithfully reproduce the golden color even in the dry developing system, the ink jet recording system and the like.
【０００６】[0006]
【課題を解決するための手段】すなわち、本発明者らは
電子写真用トナーの着色剤に銅、亜鉛、アルミニウムの
合金粉末を用いることによりトナー粒子が均一にでき、
乾式トナーとして利用できるだけでなく、また、この合
金粉末を着色剤としたトナーは導電性の高い粒子で極性
制御効果があることから現像速度が速いことを見い出し
た。その結果、連続階調性、画像濃度の高い黄金色の印
字物が得られることが判明した。本発明はこれらの知見
に基づいてなされたものである。That is, the present inventors have made uniform toner particles by using an alloy powder of copper, zinc, and aluminum as a colorant for an electrophotographic toner,
It has been found that not only can it be used as a dry toner, but a toner using this alloy powder as a colorant has high conductivity because it has highly conductive particles and has a polarity control effect. As a result, it was found that a golden print with high continuous tone and high image density can be obtained. The present invention has been made based on these findings.
【０００７】本発明によれば、（１）着色剤、樹脂を主
体とする電子写真用トナーにおいて、該着色剤が銅、亜
鉛及びアルミニウムを主成分とした合金の微粒子である
ことを特徴とする電子写真用トナー、が提供される。According to the present invention, (1) an electrophotographic toner mainly containing a colorant and a resin is characterized in that the colorant is fine particles of an alloy containing copper, zinc and aluminum as a main component. An electrophotographic toner is provided.
【０００８】また本発明によれば、（２）前記（１）に
おいて、合金の微粒子が銅５０〜９５重量％、亜鉛３〜
４０重量％、アルミニウム０．１〜１０重量％の割合か
らなるものである電子写真用トナー、（３）前記（１）
（２）において、合金の微粒子がフラッシング処理され
ている電子写真用トナー、（４）前記（１）（２）にお
いて、合金の微粉末に絶縁油及び／又は高級脂肪酸を添
加混合してなる電子写真用トナー、が提供される。According to the present invention, (2) in the above (1), the alloy fine particles comprise 50 to 95% by weight of copper and 3 to 3 of zinc.
An electrophotographic toner comprising 40% by weight and 0.1 to 10% by weight of aluminum, (3) The above (1)
(2) An electrophotographic toner in which fine particles of an alloy are subjected to a flushing treatment, (4) Electrons obtained by adding and mixing insulating oil and / or higher fatty acid to the fine powder of an alloy in (1) and (2) above. A photographic toner is provided.
【０００９】更に本発明によれば、（５）前記（１）〜
（４）の着色剤を絶縁性液体に分散させたことを特徴と
する電子写真用液体現像剤、（６）前記（１）〜（４）
の着色剤（粒径０．１〜１μｍのものの使用が望まし
い）を絶縁性液体に分散させたことを特徴とするインク
ジェット記録用インキ、が提供される。Further, according to the present invention, (5) the above (1)-
(4) A liquid developer for electrophotography, wherein the colorant (4) is dispersed in an insulating liquid, (6) The above-mentioned (1) to (4)
An ink for ink-jet recording, characterized in that the colorant (preferably having a particle size of 0.1 to 1 μm) is dispersed in an insulating liquid.
【００１０】[0010]
【発明の実施の形態】本発明の電子写真用トナーは、前
記の特定された合金微粒子の表面を樹脂で被覆した形態
を呈している。樹脂は主としてトナー粒子に定着性、分
散性、転写性を与えるために使用されるが、これの具体
的なものには、天然樹脂、スチレン−ブタジエン共重合
体、アクリル樹脂、ポリエチレン、ポリプロピレンなど
のポリオレフィン樹脂、塩化ビニル樹脂、酢酸ビニル樹
脂などを挙げることができる。湿式現像転写用トナーの
場合、特開昭５２−６３２４５号にも記載されているよ
うに、高絶縁性担体液に難溶あるいは不溶な少なくとも
１種の樹脂及び該樹脂が可溶な少なくとも１種のモノマ
ーから得られたポリマーを本発明の現像剤用樹脂として
使用するのが好適である。BEST MODE FOR CARRYING OUT THE INVENTION The toner for electrophotography of the present invention has a form in which the surface of the above specified alloy fine particles is coated with a resin. The resin is mainly used for imparting fixability, dispersibility, and transferability to the toner particles. Specific examples of the resin include natural resin, styrene-butadiene copolymer, acrylic resin, polyethylene and polypropylene. Examples thereof include polyolefin resin, vinyl chloride resin, vinyl acetate resin and the like. In the case of a toner for wet development transfer, as described in JP-A-52-63245, at least one resin which is hardly soluble or insoluble in the highly insulating carrier liquid and at least one resin which is soluble in the resin. It is preferable to use a polymer obtained from the above monomer as the developer resin of the present invention.
【００１１】このような組合せに使用される高絶縁性担
体液に難溶あるいは不溶な樹脂としては、エステルガ
ム、硬化ロジンなどの天然樹脂、天然樹脂変性マレイン
酸樹脂、天然樹脂変性フェノール樹脂、天然樹脂変性ポ
リエステル樹脂、天然樹脂変性ペンタエリスリトール樹
脂などの天然樹脂変性熱硬化性樹脂が適当である。また
これらの樹脂が可溶なモノマーとしては一般式Resins that are hardly soluble or insoluble in the highly insulating carrier liquid used in such a combination include natural resins such as ester gum and hardened rosin, natural resin-modified maleic acid resins, natural resin-modified phenolic resins and natural resins. Natural resin-modified thermosetting resins such as resin-modified polyester resin and natural resin-modified pentaerythritol resin are suitable. In addition, as a monomer in which these resins are soluble, a general formula
【化１】 〔Ｒは−Ｈ又は−ＣＨ3基、Ａは−ＣＯＯＣｎＨ2ｎ＋1
又は−ＯＣＯＣｎＨ2n＋1基（ｎは６〜２０の整数）〕
で示されるビニルモノマーであって、このモノマーから
得られるポリマーと前記の天然樹脂、天然樹脂変性熱硬
化性樹脂を組み合わせる。Embedded image [R is -H or -CH 3 radical, A is -COOCnH 2 n + 1
Or -OCOCnH 2n + 1 group (n is 6 to 20 integer)]
Which is a vinyl monomer represented by the following formula, and the polymer obtained from this monomer is combined with the above-mentioned natural resin or natural resin-modified thermosetting resin.
【００１２】また、前記ビニルモノマーにグリシジルメ
タクリレート、グリシジルアクリレート、プロピレング
リコールモノアクリレート、ヒドロキシエチルメタクリ
レート、アクリロニトリル及びメタアクリロニトリル共
重合（グラフト重合を含む）させたものも有効である。It is also effective to use a copolymer of the above vinyl monomer with glycidyl methacrylate, glycidyl acrylate, propylene glycol monoacrylate, hydroxyethyl methacrylate, acrylonitrile and methacrylonitrile (including graft polymerization).
【００１３】本発明の電子写真液体現像剤、インクジェ
ット記録用インクは以上のような樹脂と銅、亜鉛、アル
ミニウムを主成分とする合金の微粒子（着色剤）とを高
絶縁性担体液に分散させることにより構成される。高絶
縁性担体液には電気抵抗１０10Ωｃｍ以上でかつ誘電率
が３以下の溶媒が使用される。これには例えばパラフィ
ン系炭化水素、イソパラフィン系炭化水素、ハロゲン化
炭化水素などを挙げることができ、具体的にはｎ−ヘキ
サン、ｎ−ヘプタン、イソドデカン、四塩化炭素、パー
クロルエチレン、ケロシンなどの単体液又は混合液とし
て使用することができる。In the electrophotographic liquid developer and ink jet recording ink of the present invention, the above resin and fine particles (colorant) of an alloy containing copper, zinc and aluminum as a main component are dispersed in a highly insulating carrier liquid. It is composed of As the highly insulating carrier liquid, a solvent having an electric resistance of 10 10 Ωcm or more and a dielectric constant of 3 or less is used. Examples thereof include paraffin hydrocarbons, isoparaffin hydrocarbons, halogenated hydrocarbons, and the like. Specific examples include n-hexane, n-heptane, isododecane, carbon tetrachloride, perchlorethylene and kerosene. It can be used as a simple liquid or a mixed liquid.
【００１４】本発明における着色剤は原則的には、Ｃ
ｕ、Ｚｎ、Ａｌを主成分とする合金の微粉末であるが、
合金成分にはＦｅ、Ｎｉ、Ｓｒ、Ｂａ、Ｃａ、Ｍｇ、Ｍ
ｎ、Ｎａ、Ｋ、Ｐｂなどを微量存在させることもでき
る。Ｃｕ、Ｚｎ、Ａｌの配合比はＣｕ５０〜９５重量％
好ましくは７０〜９０重量％、Ｚｎ３〜４０重量％好ま
しくは１０〜３０重量％、Ａｌ０．１〜１０重量％好ま
しくは０．５〜５重量％である。In principle, the colorant used in the present invention is C
Although it is a fine powder of an alloy containing u, Zn, and Al as main components,
Fe, Ni, Sr, Ba, Ca, Mg, M are used as alloy components.
A small amount of n, Na, K, Pb, etc. can be present. The compounding ratio of Cu, Zn and Al is Cu 50 to 95% by weight.
It is preferably 70 to 90% by weight, Zn 3 to 40% by weight, preferably 10 to 30% by weight, and Al 0.1 to 10% by weight, preferably 0.5 to 5% by weight.
【００１５】この合金の微粒子はそれぞれの合金成分を
混合し、これら金属の中で最も融点の高い温度にまで加
熱して溶融混練した後、冷却して又冷却しながら粉砕な
どの手段によって粒径が１〜１００μｍ好ましくは３〜
２０μｍの範囲に収まるように微細化することによって
得られる。The fine particles of this alloy are prepared by mixing the respective alloy components, heating to the highest melting point among these metals, melt-kneading, and then cooling or pulverizing while cooling and the like. Is 1 to 100 μm, preferably 3 to
It is obtained by miniaturization so that it falls within the range of 20 μm.
【００１６】また、本発明の着色剤は上記の合金微粒子
１００重量部に対し、絶縁油（アイソパーＨ、Ｌ、Ｍな
どの脂肪族炭化水素）及び／又は高級脂肪酸（オレイン
酸、ナフテン酸、ステアリン酸、ミリスチン酸など）を
１〜１０重量部好ましくは３〜７重量部の割合で添加混
合して調製することが望ましい。このことは着色剤の色
調として黄金色を適正化するためであると同時に、絶縁
油、高級脂肪酸は極性制御効果と合金微粉末の分散性を
上げる効果がある。The coloring agent of the present invention is based on 100 parts by weight of the above alloy fine particles, insulating oil (aliphatic hydrocarbon such as Isopar H, L, M) and / or higher fatty acid (oleic acid, naphthenic acid, stearin). Acid, myristic acid, etc.) in an amount of 1 to 10 parts by weight, preferably 3 to 7 parts by weight. This is for optimizing the golden color as the color tone of the colorant, and at the same time, the insulating oil and the higher fatty acid have the effect of controlling the polarity and the effect of improving the dispersibility of the alloy fine powder.
【００１７】更に本発明の着色剤は前記の合金の微粒子
を樹脂と混練することにより得ることができる。好まし
くはフラッシング法により樹脂に被覆されたフラッシン
グ着色剤とすれば、より定着性を向上させることができ
る。例えば、本発明の銅−亜鉛−アルミ合金の微粒子又
は含水ペーストを現像剤担体液に実質上不溶な樹脂と共
に混練し、蒸発物を除去した後、粉砕せしめればよい。Further, the colorant of the present invention can be obtained by kneading the fine particles of the above alloy with a resin. The fixing property can be further improved by using a flushing colorant coated with a resin by a flushing method. For example, the fine particles of copper-zinc-aluminum alloy or the water-containing paste of the present invention may be kneaded together with a resin that is substantially insoluble in the developer carrier liquid, and after removing the evaporated material, it may be ground.
【００１８】ここで、本発明の着色剤（合金成分のみか
らなるものを含む）を示す。 （着色剤微粒子例） NO.1 銅 80wt％ 亜鉛 18wt％ アルミニウム 2wt％ （粒径５μｍ） NO.2 銅 90wt％ 亜鉛 9wt％ アルミニウム 1wt％ （粒径３μｍ） NO.3 銅 70wt％ 亜鉛 25wt％ アルミニウム 5wt％ （粒径２μｍ） NO.4 銅 75wt％ 亜鉛 24wt％ アルミニウム 1wt％ （粒径８μｍ） NO.5 銅 90wt％ 亜鉛 7.5wt％ アルミニウム 1wt％ ニッケル 0.5wt％ ミリスチン酸 1wt％ （粒径１５μｍ） NO.6 銅 75wt％ 亜鉛 22wt％ アルミニウム 1wt％ カルシウム 1wt％ ケロシン 1wt％ （粒径８μｍ） NO.7 NO.1の合金粉末100重量部とロジン変性マレイン酸樹脂（50％トルエン溶 液）500重量部をニーダーにより100℃で2時間混練後トルエンを除きフラ ッシング着色剤を得た。（粒径９０μｍ） NO.8 NO.5の合金100重量部とエチレン−酢ビ共重合体（エバフレックス２１０ ）を700重量部とをニーダーで120℃で2時間混練しフラッシング着色剤を 得た。（粒径８０μｍ） NO.9 NO.5の合金200重量部とスチレンアクリル樹脂1000重量部とを120℃の二本 ローラーで混練し粉砕して、粒径５μｍの乾式トナーを作成した。Here, the colorants of the present invention (including those containing only alloy components) are shown. (Examples of colorant fine particles) NO.1 Copper 80wt% Zinc 18wt% Aluminum 2wt% (particle size 5μm) NO.2 Copper 90wt% Zinc 9wt% Aluminum 1wt% (particle size 3μm) NO.3 Copper 70wt% Zinc 25wt% Aluminum 5wt% (particle size 2μm) NO.4 Copper 75wt% Zinc 24wt% Aluminum 1wt% (particle size 8μm) NO.5 Copper 90wt% Zinc 7.5wt% Aluminum 1wt% Nickel 0.5wt% Myristic acid 1wt% (particle size 15μm) NO.6 Copper 75wt% Zinc 22wt% Aluminum 1wt% Calcium 1wt% Kerosene 1wt% (particle size 8μm) NO.7 NO.1 alloy powder 100 parts by weight and rosin-modified maleic acid resin (50% toluene solution) 500 parts by weight The parts were kneaded with a kneader at 100 ° C. for 2 hours and then toluene was removed to obtain a flushing colorant. (Particle size 90 μm) 100 parts by weight of NO.8 NO.5 alloy and 700 parts by weight of ethylene-vinyl acetate copolymer (Evaflex 210) were kneaded with a kneader at 120 ° C. for 2 hours to obtain a flushing colorant. . (Particle size 80 μm) 200 parts by weight of NO.9 NO.5 alloy and 1000 parts by weight of styrene-acrylic resin were kneaded with two rollers at 120 ° C. and pulverized to prepare a dry toner having a particle size of 5 μm.
【００１９】以上のようにして得られた合金微粒子を主
体とした着色剤は粒子径が均一で、帯電も安定している
ため現像速度が速く、高画像品質で階調性、定着性のよ
い電子写真乾式又は湿式現像剤、インクジェット記録用
インキに応用できる。またカラー印字における黄金色の
再現にすぐれたものとなる。The colorant mainly composed of the alloy fine particles obtained as described above has a uniform particle size and is stable in charging, so that the developing speed is high, the image quality is high and the gradation and the fixability are good. It can be applied to electrophotographic dry or wet developers and ink jet recording inks. Also, it is excellent in reproducing the golden color in color printing.
【００２０】[0020]
【実施例】次に実施例をあげて本発明をさらに具体的に
説明する。Next, the present invention will be described more specifically with reference to examples.
【００２１】実施例１ 着色剤微粒子例Ｎｏ．１ ３００重量部 スチレン−エチルアクリレート樹脂 １０００重量部 ニグロシン １０重量部 これらをニーダーで１００℃で２時間混練後、二本ロー
ルで１２０℃、３０分練り、冷却後、粉砕分散し、粒径
７．２μｍの乾式トナーを作成した。この乾式トナーを
用い乾式複写機（リコー社製 ＦＴ−４０６０）でコピ
ーしたところ画像濃度１．２２、階調性７段、転写率７
２％で黄金色のコピーを得ることができた。Example 1 Colorant fine particles No. 1 300 parts by weight Styrene-ethyl acrylate resin 1000 parts by weight Nigrosine 10 parts by weight After kneading these with a kneader at 100 ° C. for 2 hours, kneading with a two-roll mill at 120 ° C. for 30 minutes, cooling, pulverizing and dispersing, and particle size 7. A 2 μm dry toner was prepared. When this dry toner was used to make a copy with a dry copying machine (FT-4060 manufactured by Ricoh Co., Ltd.), the image density was 1.22, gradation was 7 levels, and transfer rate was 7
A golden copy could be obtained at 2%.
【００２２】実施例２ 着色剤微粒子例５ １００重量部 メチルメタクリレート−ステアリル メタクリレート共重合体 ２００重量部 脂肪族炭化水素（アイソパーＨ） １０００重量部 これらをアトライターで２時間分散し、湿式トナーを作
成した。トナー粒径は４．３μｍで均一なものが得られ
た。この液体現像剤を用い湿式複写機（リコー社製 Ｄ
Ｔ−１２００）でコピーしたところ画像濃度は１．２
８、階調性８段、転写率７６％、定着性７２％であっ
た。またコピーは黄金色で光沢のあるものが得られた。Example 2 Colorant Fine Particle Example 5 100 parts by weight Methyl methacrylate-stearyl methacrylate copolymer 200 parts by weight Aliphatic hydrocarbon (Isopar H) 1000 parts by weight These were dispersed for 2 hours with an attritor to prepare a wet toner. did. The toner particle diameter was 4.3 μm, and a uniform toner was obtained. A wet copying machine (Ricoh D
The image density is 1.2 when copied with T-1200).
8, gradation was 8 steps, transfer rate was 76%, and fixability was 72%. The copy was golden and shiny.
【００２３】実施例３ 着色剤微粒子例７のフラッシング着色剤 １００重量部 エチレン−酢ビ共重合体 １００重量部 脂肪族炭化水素（アイソパーＨ） ８００重量部 これらをアトライターで２時間分散し、湿式トナーを作
成した。トナー粒径は２．２μｍで均一であった。この
液体現像剤を用い湿式複写機（リコー社製 ＤＴ−１２
００）でコピーしたところ画像濃度は１．３０、階調性
９段、転写率８０％、定着性７８％であった。またコピ
ーは黄金色でシャープネス、解像力も優れていた。Example 3 Colorant Fine Particles Flushing colorant of Example 7 100 parts by weight Ethylene-vinyl acetate copolymer 100 parts by weight Aliphatic hydrocarbon (Isopar H) 800 parts by weight These were dispersed for 2 hours with an attritor and wet. Toner created. The toner particle size was 2.2 μm, which was uniform. A wet copier (DT-12 manufactured by Ricoh Co., Ltd.) was prepared using this liquid developer.
The image density was 1.30, the gradation was 9 levels, the transfer rate was 80%, and the fixability was 78%. The copy was golden and had excellent sharpness and resolution.
【００２４】実施例４ 着色剤微粒子例８のフラッシング着色剤 １００重量部 アイソパーＨ １００重量部 これらをボールミルで２４時間分散し、インクジェット
記録用インクとした。このインクをインクジェット記録
方式で吐出させたところ、ドット径５０μｍでにじみの
ない黄金色の印字であった。また定着率は８０％で高い
ものであった。Example 4 100 parts by weight of flushing colorant of colorant fine particle example 8 100 parts by weight of Isopar H These were dispersed in a ball mill for 24 hours to prepare an ink for ink jet recording. When this ink was ejected by an ink jet recording method, it was a golden color print with a dot diameter of 50 μm and no bleeding. The fixing rate was as high as 80%.
【００２５】[0025]
【発明の効果】請求項１の発明によれば、着色剤が銅、
亜鉛、アルミニウムを少なくとも含む合金微粉末であ
り、従来フルカラーコピーで得ることのできない黄金色
の色再現が可能になった。更にトナーの帯電が安定化
し、高画質、階調性の高いコピーを得ることが可能にな
った。請求項２の発明によれば、銅−亜鉛−アルミニウ
ムの合金比率を決めることにより黄金色がより金色に近
くすることができる。請求項３の発明によれば、フラッ
シング法による着色剤の製造により銅−亜鉛−アルミニ
ウム合金微粉末が樹脂に被覆されることにより転写率が
上がり、定着率や画像濃度が更に向上する効果を有す
る。請求項４の発明によれば、トナー粒子に絶縁油及び
／又は高級脂肪を絶縁油を添加したことにより帯電性、
分散性が上がり高画質が得られる効果が認められる。請
求項５の発明によれば、湿式トナーとして用いても良質
の画像が得られる。請求項６の発明によれば、インクジ
ェット方式のインキに用いても吐出性がよく、にじみ画
像もない、またドット径が小さく出来る効果が認められ
る。According to the invention of claim 1, the colorant is copper,
Since it is an alloy fine powder containing at least zinc and aluminum, it is possible to reproduce a golden color that cannot be obtained by full-color copying. Further, the toner charge is stabilized, and it becomes possible to obtain a copy having high image quality and high gradation. According to the invention of claim 2, the golden color can be made closer to the golden color by determining the alloy ratio of copper-zinc-aluminum. According to the invention of claim 3, since the copper-zinc-aluminum alloy fine powder is coated on the resin by the production of the colorant by the flushing method, the transfer rate is increased, and the fixing rate and the image density are further improved. . According to the invention of claim 4, by adding insulating oil and / or higher fat to the toner particles
The effect of increasing the dispersibility and obtaining high image quality is recognized. According to the invention of claim 5, a good quality image can be obtained even when used as a wet toner. According to the invention of claim 6, even when used in an ink jet system ink, the ejection property is good, there is no bleeding image, and the effect that the dot diameter can be made small is recognized.
Claims (6)
ナーにおいて、該着色剤が銅、亜鉛及びアルミニウムを
主成分とした合金の微粉末であることを特徴とする電子
写真用トナー。1. An electrophotographic toner mainly comprising a colorant and a resin, wherein the colorant is a fine powder of an alloy containing copper, zinc and aluminum as a main component.
５０〜９５重量％、亜鉛３〜４０重量％、アルミニウム
０．１〜１０重量％の割合からなることを特徴とする電
子写真用トナー。2. The electrophotographic apparatus according to claim 1, wherein the fine powder of the alloy is 50 to 95% by weight of copper, 3 to 40% by weight of zinc, and 0.1 to 10% by weight of aluminum. toner.
末がフラッシング処理されていることを特徴とする電子
写真用トナー。3. The toner for electrophotography according to claim 1, wherein the fine powder of the alloy is subjected to a flushing treatment.
末に絶縁油及び／又は高級脂肪酸を添加混合してなるこ
とを特徴とする電子写真用トナー。4. The toner for electrophotography according to claim 1, wherein the fine powder of the alloy is mixed with insulating oil and / or higher fatty acid.
せたことを特徴とする電子写真用液体現像剤。5. A liquid developer for electrophotography, comprising the colorant according to claim 1 dispersed in an insulating liquid.
せたことを特徴とするインクジェット記録用インキ。6. An ink for inkjet recording, wherein the colorant according to claim 1 is dispersed in an insulating liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34004795A JP3500483B2 (en) | 1995-12-04 | 1995-12-04 | Electrophotographic toner, electrophotographic liquid developer and ink-jet recording ink |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34004795A JP3500483B2 (en) | 1995-12-04 | 1995-12-04 | Electrophotographic toner, electrophotographic liquid developer and ink-jet recording ink |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09160298A true JPH09160298A (en) | 1997-06-20 |
| JP3500483B2 JP3500483B2 (en) | 2004-02-23 |
Family
ID=18333222
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34004795A Expired - Fee Related JP3500483B2 (en) | 1995-12-04 | 1995-12-04 | Electrophotographic toner, electrophotographic liquid developer and ink-jet recording ink |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3500483B2 (en) |
Cited By (5)
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|---|---|---|---|---|
| WO2005076086A1 (en) * | 2004-01-30 | 2005-08-18 | Eastman Kodak Company | Metallic hue toner and its preparation |
| JP2005290208A (en) * | 2004-03-31 | 2005-10-20 | Nof Corp | Ink composition |
| EP1744223A1 (en) * | 2005-07-13 | 2007-01-17 | Eastman Kodak Company | Method for preparing toner and the toner |
| US9239532B2 (en) | 2013-09-05 | 2016-01-19 | Fuji Xerox Co., Ltd. | Brilliant toner, electrostatic charge image developer, and toner cartridge |
| US9846396B2 (en) | 2015-10-14 | 2017-12-19 | Ricoh Company, Ltd. | Transfer device and image forming apparatus incorporating same |
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| JPS6267558A (en) * | 1985-09-20 | 1987-03-27 | Ricoh Co Ltd | Toner for developing electrostatic charge image |
| JPH0539448A (en) * | 1991-08-07 | 1993-02-19 | Fukuda Metal Foil & Powder Co Ltd | Gold powder for printing |
| JPH06116524A (en) * | 1992-10-05 | 1994-04-26 | Fukuda Metal Foil & Powder Co Ltd | Gold powder for gold ink |
| JPH07223362A (en) * | 1994-02-10 | 1995-08-22 | Fuji Xerox Co Ltd | Multiple color recording method |
| JPH07234550A (en) * | 1994-01-07 | 1995-09-05 | Xerox Corp | Liquid developer composition |
| JPH07257014A (en) * | 1994-02-28 | 1995-10-09 | E I Du Pont De Nemours & Co | Reactive medium - ink system for ink-jet printing |
| JPH07278462A (en) * | 1994-04-13 | 1995-10-24 | Fukuda Metal Foil & Powder Co Ltd | Gold powder for gold ink |
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1995
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| JPS6267558A (en) * | 1985-09-20 | 1987-03-27 | Ricoh Co Ltd | Toner for developing electrostatic charge image |
| JPH0539448A (en) * | 1991-08-07 | 1993-02-19 | Fukuda Metal Foil & Powder Co Ltd | Gold powder for printing |
| JPH06116524A (en) * | 1992-10-05 | 1994-04-26 | Fukuda Metal Foil & Powder Co Ltd | Gold powder for gold ink |
| JPH07234550A (en) * | 1994-01-07 | 1995-09-05 | Xerox Corp | Liquid developer composition |
| JPH07223362A (en) * | 1994-02-10 | 1995-08-22 | Fuji Xerox Co Ltd | Multiple color recording method |
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|---|---|---|---|---|
| WO2005076086A1 (en) * | 2004-01-30 | 2005-08-18 | Eastman Kodak Company | Metallic hue toner and its preparation |
| JP2007519982A (en) * | 2004-01-30 | 2007-07-19 | イーストマン コダック カンパニー | Metal hue toner and its manufacture |
| US7326507B2 (en) | 2004-01-30 | 2008-02-05 | Eastman Kodak Company | Preparation of a toner for reproducing a metallic hue and the toner |
| JP2005290208A (en) * | 2004-03-31 | 2005-10-20 | Nof Corp | Ink composition |
| EP1744223A1 (en) * | 2005-07-13 | 2007-01-17 | Eastman Kodak Company | Method for preparing toner and the toner |
| WO2007006481A1 (en) * | 2005-07-13 | 2007-01-18 | Eastman Kodak Company | Method for preparing toner and the toner |
| JP2009501349A (en) * | 2005-07-13 | 2009-01-15 | イーストマン コダック カンパニー | Method for preparing toner and toner thereof |
| US9239532B2 (en) | 2013-09-05 | 2016-01-19 | Fuji Xerox Co., Ltd. | Brilliant toner, electrostatic charge image developer, and toner cartridge |
| US9846396B2 (en) | 2015-10-14 | 2017-12-19 | Ricoh Company, Ltd. | Transfer device and image forming apparatus incorporating same |
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| Publication number | Publication date |
|---|---|
| JP3500483B2 (en) | 2004-02-23 |
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