JP2635623B2 - Color liquid developer for electrostatic photography - Google Patents
Color liquid developer for electrostatic photographyInfo
- Publication number
- JP2635623B2 JP2635623B2 JP25161187A JP25161187A JP2635623B2 JP 2635623 B2 JP2635623 B2 JP 2635623B2 JP 25161187 A JP25161187 A JP 25161187A JP 25161187 A JP25161187 A JP 25161187A JP 2635623 B2 JP2635623 B2 JP 2635623B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid developer
- resin
- pigment
- color
- color liquid
- 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
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/12—Recording members for multicolour processes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Liquid Developers In Electrophotography (AREA)
Description
【発明の詳細な説明】 ［技術分野］ 本発明は静電写真用カラー液体現像剤に関する。Description: TECHNICAL FIELD The present invention relates to a color liquid developer for electrostatography.
［従来技術］ 電子写真、静電記録等の静電写真に用いられるカラー
液体現像剤は数色の顔料とロジン、アマニ油、大豆油、
変性アルキッド樹脂、スチレン−ブタジエン共重合体、
アクリル樹脂等の樹脂又は油脂を各色ごとに脂肪族炭化
水素のような高絶縁性低誘電率の担体液体中に粉砕分散
することによって得ている。[Prior Art] Color liquid developers used for electrophotography such as electrophotography and electrostatic recording are pigments of several colors, rosin, linseed oil, soybean oil,
Modified alkyd resin, styrene-butadiene copolymer,
It is obtained by pulverizing and dispersing a resin such as an acrylic resin or a fat or oil in a carrier liquid having a high insulating property and a low dielectric constant such as an aliphatic hydrocarbon for each color.
そしてこのような一組の現像剤を用いてカラー画像を
得る場合には、電子写真感光紙や静電記録紙等に常法に
より静電潜像を形成後、これを液体現像剤で現像するプ
ロセスを各色について繰り返し行い、数色のトナーを順
次重ね合わせることによりカラー画像を得る。When a color image is obtained using such a set of developers, an electrostatic latent image is formed on an electrophotographic photosensitive paper or an electrostatic recording paper by a conventional method, and then developed with a liquid developer. The process is repeated for each color, and a color image is obtained by sequentially overlaying several color toners.
カラー静電写真は前述のように数色のトナーを重ね合
わせるために、地肌部分のカブリが累積される。このよ
うにして得られたカラー画像はコントラストが低いもの
であり、十分に満足なものではなかった。As described above, in the color electrophotography, fog of the background portion is accumulated because toners of several colors are overlapped. The color image thus obtained had low contrast, and was not sufficiently satisfactory.
カラー静電写真では、例えば黒、シアン、マゼンタ、
イエローの順にトナーを重ねる方法があり、一般的にマ
ゼンタトナーのカブリが目立っている。In color electrostatic photography, for example, black, cyan, magenta,
There is a method of superimposing toner in the order of yellow, and generally, fog of magenta toner is conspicuous.
マゼンタトナーに用いられる顔料としては、鮮明な紫
みの色調とすぐれた透明性からカーミン6Bに代表される
アゾレーキ顔料が用いられるが、アゾレーキ顔料を用い
て前述のような方法で分散して得られるトナーは全て地
肌カブリの劣るものであった。As the pigment used in the magenta toner, an azo lake pigment represented by Carmine 6B is used because of its vivid purple hue and excellent transparency, but it is obtained by dispersing using the azo lake pigment in the manner described above. All toners were inferior in background fog.
また、別の方法で得られるトナーとして染料によりタ
テックスを染色し、これをトナーに応用することも検討
されているが（特開昭45−25818、特開昭56−10619な
ど）、このものではラテックスに染み込まなかった染料
の除去が完全でないと地肌カブリを生じさせるといった
問題がある。Further, it has been studied to dye Tatex with a dye as a toner obtained by another method and apply the dye to the toner (JP-A-45-25818, JP-A-56-10619, etc.). If the dye that has not soaked into the latex is not completely removed, there is a problem that background fogging occurs.
［目 的］ 本発明の目的は前述したような欠点を除去した、重ね
現像型のカラー静電写真に好適であり、かつ静電写真法
による単色（赤色）カラー画像を得るための静電写真用
カラー液体現像剤にも応用できるマゼンタ色液体現像剤
を提供することにある。[Purpose] An object of the present invention is to remove the above-mentioned drawbacks, remove the above-mentioned disadvantages, is suitable for a multi-layer color electrostatography, and obtain an electrostatographic single-color (red) color image. It is an object of the present invention to provide a magenta liquid developer which can be applied to a color liquid developer for use in magenta.
［構 成］ 本発明は顔料および樹脂を主成分とするトナーを担体
液中に分散してなる液体現像剤において、該顔料が下記
一般式で表わされることを特徴とする。[Constitution] The present invention is directed to a liquid developer obtained by dispersing a toner containing a pigment and a resin as main components in a carrier liquid, wherein the pigment is represented by the following general formula.
ただし、Ｘ、ＹはそれぞれＨ、−CH3、 −OCH3、−COOCH3、 −COOC4H9、−NO2、 −SO2・NH・CH3、−C1、 を表わす。 However, X, Y are each H, -CH 3, -OCH 3, -COOCH 3, -COOC 4 H 9, -NO 2, -SO 2 · NH · CH 3, -C1, Represents
本発明で使用される顔料は前記一般式（Ｉ）で示され
る。ナフトールAS系ベンズイミダゾロン顔料である。The pigment used in the present invention is represented by the general formula (I). It is a naphthol AS-based benzimidazolone pigment.
このものの代表例としては次の顔料が上げられる。 The following pigments are mentioned as typical examples.
上記顔料の特徴としては構造式中に特定の基（−CONH
−）を２個以上有するために、耐溶剤性に優れるため、
液体現像剤に使用した場合、得られる画像は地肌カブリ
が少ないという特徴を発揮する。 The pigment is characterized by a specific group (-CONH
-) Because it has two or more, excellent solvent resistance,
When used in a liquid developer, the resulting image exhibits the characteristic of low background fog.
このような顔料を用いて液体現像剤を調整するには、
この顔料１〜10重量部と結着剤１〜50重量部と担体液40
〜100重量部とをアトライター、ボールミル、サンドミ
ルなどで混練分散して濃縮トナーとし、必要によりこれ
を同様な担体液で希釈すればよい。To adjust a liquid developer using such a pigment,
1 to 10 parts by weight of this pigment, 1 to 50 parts by weight of a binder, and 40
To 100 parts by weight is kneaded and dispersed by an attritor, a ball mill, a sand mill or the like to obtain a concentrated toner, which may be diluted with a similar carrier liquid if necessary.
ここでの結着剤としてはアルキッド樹脂、ロジン変性
フェノールホルムアルデヒド樹脂、水素添加ロジンの多
価アルコールエステル、ポリアクリル又はポリメタクリ
ルエステル樹脂、スチレン樹脂、塩化ゴムなどが使用さ
れるが、特に下記一般式（II） ［但し、R1は水素又はメチル基、R2は−COOCnH2n+1又は
−OCOCnH2n+1（ｎは６〜20の整数）である。］ で表わされるモノマーとアクリル酸、メタクリル酸、ビ
ニルピリジン、下記一般式（III） ［但し、R3は水素又はメチル基、R4は−OCOCnH2n+1又は
−COOCnH2n+1（ｎは１〜５の整数）である。］ で表わされるモノマー、下記一般式（IV） ［但し、R5は水素又はメチル基、R6は−Ｎ（CH3）２、
−Ｎ（C2H5）２又は−OHである。］ で表わされるモノマー及びエチレングリコールジメタア
クリレートから選ばれる１種又は２種以上のモノマーと
の共重合体（ブロック共重合体を含む）の使用が効果的
である。一般式（II）で表わされるビニルモノマー成分
の共重合体に占める割合は30〜95重量％くらいが適当で
ある。As the binder herein, alkyd resin, rosin-modified phenol formaldehyde resin, polyhydric alcohol ester of hydrogenated rosin, polyacrylic or polymethacrylic ester resin, styrene resin, chlorinated rubber, etc. are used. (II) [Where, R 1 is hydrogen or methyl, R 2 is -COOC n H 2n + 1 or -OCOC n H 2n + 1 (n is 6 to 20 integer). And acrylic acid, methacrylic acid, vinylpyridine and the following general formula (III) Wherein R 3 is hydrogen or a methyl group, and R 4 is —OCOC n H 2n + 1 or —COOC n H 2n + 1 (n is an integer of 1 to 5). A monomer represented by the following general formula (IV): Wherein R 5 is hydrogen or a methyl group, R 6 is —N (CH 3 ) 2 ,
—N (C 2 H 5 ) 2 or —OH. The use of a copolymer (including a block copolymer) with one or two or more monomers selected from the monomers represented by the following formulas and ethylene glycol dimethacrylate is effective. The proportion of the vinyl monomer component represented by the general formula (II) in the copolymer is suitably about 30 to 95% by weight.
結着剤には必要に応じてこれらにエステルガム、軟化
ロジン等の天然樹脂や、天然樹脂変性マレイン樹脂、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、エポキ
シ樹脂等の天然樹脂変性熱硬化性樹脂が加えられてよ
い。Binders include natural resins such as ester gums and softened rosins, natural resin modified maleic resin, natural resin modified phenolic resin, natural resin modified polyester resin, natural resin modified pentaerythritol resin, epoxy resin, etc., if necessary. May be added.
なお、担体液としてはパラフィン系又はイソパラフィ
ン系炭化水素（エッソ社製のアイソパーＨ、アイソパー
Ｇ、アイソパーＬ、アイソパーＫ、ナフサNo.6ソルベッ
ソ100など）、リグロイン、ｎ−ヘキサン、ｎ−ヘプタ
ン、iso−オクタン、ｎ−オクタン、四塩化炭素、トリ
クロロトリフルオロエタン、シクロヘキサン等が単独で
あるいは２種以上が組合わされて使用される。The carrier liquid may be a paraffinic or isoparaffinic hydrocarbon (such as Isopar H, Isopar G, Isopar L, Isopar K, Naphtha No. 6 Solvesso 100 manufactured by Esso), ligroin, n-hexane, n-heptane, iso- -Octane, n-octane, carbon tetrachloride, trichlorotrifluoroethane, cyclohexane and the like are used alone or in combination of two or more.
以下に実施例を示す。 Examples will be described below.
実施例１ 下記表１の組成による混合物をボールミルに入れ、24
時間分散して濃縮トナーを作製した。Example 1 A mixture having the composition shown in Table 1 below was placed in a ball mill, and
After time dispersion, a concentrated toner was prepared.
この濃縮トナー30部をアイソパーＧ（エクソン化学社
製）１で希釈して液体現像剤を調整した。A liquid developer was prepared by diluting 30 parts of the concentrated toner with Isopar G (manufactured by Exxon Chemical).
続いてこの液体現像剤を用い、静電プリンタープロッ
ターＶ−80（バーサテック社製）で印字したところ、地
肌部のカブリのない画像が得られた。下記表２に評価結
果を示す。Subsequently, printing was performed using this liquid developer with an electrostatic printer plotter V-80 (manufactured by Versatech), and an image without fog on the background was obtained. Table 2 below shows the evaluation results.
なお、印字に際して記録紙はリコー製静電記録紙タイ
プAVを用いた。The recording paper used was Ricoh's electrostatic recording paper type AV.
比較例 実施例の顔料を下記一般式で示されるブリリアントカ
ーミン6Bに変えたほかは実施例と同様に比較用液体現像
剤を調整した。この液体現像剤を用いて実施例と同様に
印字したところ、画像濃度が低く、地肌部のカブリの目
立つものであった。Comparative Example A comparative liquid developer was prepared in the same manner as in the example, except that the pigment of the example was changed to brilliant carmine 6B represented by the following general formula. When printing was performed in the same manner as in the example using this liquid developer, the image density was low, and fog on the background portion was conspicuous.
○ 画像濃度はベタ画像部をマスク反射濃度計RD−914
により測定した。 ○ For image density, use a mask reflection densitometer RD-914
Was measured by
○ 地肌カブリは地肌部の反射濃度から未印字の記録紙
の反射濃度を差し引いた値で、マクベス反射濃度計RD−
514により測定した。○ Background fog is a value obtained by subtracting the reflection density of unprinted recording paper from the reflection density of the background, and is a Macbeth reflection densitometer RD-
Measured by 514.
［効 果］ 実施例及び比較例の対比から明らかなように、本発明
の液体現像剤は地肌カブリがなく、画像濃度も高いもの
であり、カラー画像のコントラストを向上させるもので
ある。[Effects] As is clear from the comparison between Examples and Comparative Examples, the liquid developer of the present invention has no background fog, has a high image density, and improves the contrast of a color image.
Claims (1)
体液中に分散してなる液体現像剤において、該顔料が下
記一般式で表わされることを特徴とする静電写真用カラ
ー液体現像剤。 ただし、Ｘ、ＹはそれぞれＨ、−CH3、 −OCH3、−COOCH3、 −COOC4H9、−NO2、 −SO2・NH・CH3、−C1、 を表わす。An electrophotographic color liquid developer comprising a liquid developer comprising a carrier and a toner containing a pigment and a resin as main components, wherein the pigment is represented by the following general formula: . However, X, Y are each H, -CH 3, -OCH 3, -COOCH 3, -COOC 4 H 9, -NO 2, -SO 2 · NH · CH 3, -C1, Represents
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25161187A JP2635623B2 (en) | 1987-10-07 | 1987-10-07 | Color liquid developer for electrostatic photography |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25161187A JP2635623B2 (en) | 1987-10-07 | 1987-10-07 | Color liquid developer for electrostatic photography |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0194353A JPH0194353A (en) | 1989-04-13 |
| JP2635623B2 true JP2635623B2 (en) | 1997-07-30 |
Family
ID=17225391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25161187A Expired - Lifetime JP2635623B2 (en) | 1987-10-07 | 1987-10-07 | Color liquid developer for electrostatic photography |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2635623B2 (en) |
-
1987
- 1987-10-07 JP JP25161187A patent/JP2635623B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0194353A (en) | 1989-04-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3909433A (en) | Liquid electrophotographic developing compositions | |
| US5204207A (en) | Magenta color liquid developer for electrophotography | |
| JP3458166B2 (en) | Magenta toner for developing electrostatic latent images | |
| JPS6356536B2 (en) | ||
| US4957842A (en) | Liquid developer for electrostatic latent images using flushed pigments | |
| JP2635623B2 (en) | Color liquid developer for electrostatic photography | |
| US4141849A (en) | Developer for developing electrostatic latent images | |
| JP3073821B2 (en) | Magenta liquid developer for electrostatography | |
| JP3073791B2 (en) | Magenta liquid developer for electrostatography | |
| JP4624219B2 (en) | Toner for electrophotographic printing and electrophotographic printing method | |
| JPH01145666A (en) | Liquid color developer for electrostatic photography | |
| JPH01159666A (en) | Nonmagnetic one component type cyan toner | |
| JP7314948B2 (en) | Magenta toner and its manufacturing method | |
| JPH012065A (en) | Color liquid developer for electrostatography | |
| JPS5858667B2 (en) | Liquid developer for electrostatography | |
| JP7127646B2 (en) | magenta toner | |
| JP3612216B2 (en) | Liquid developer | |
| JPH0654397B2 (en) | Toner for electrostatic image development | |
| JPH05165261A (en) | Color liquid developer for electrostatic photograph | |
| JPS5997157A (en) | Electrophotographic liquid developer | |
| JPH01116565A (en) | Liquid developer for color electrostatic photograph | |
| JPH08272152A (en) | Negative electric liquid developer | |
| JP3081637B2 (en) | Color liquid developer for electrostatic photography | |
| JPH0421863B2 (en) | ||
| JPH01149058A (en) | Nonmagnetic one-component type yellow toner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080425 Year of fee payment: 11 |