JPH03217853A - Toner for developing electrostatic images - Google Patents
Toner for developing electrostatic imagesInfo
- Publication number
- JPH03217853A JPH03217853A JP2013224A JP1322490A JPH03217853A JP H03217853 A JPH03217853 A JP H03217853A JP 2013224 A JP2013224 A JP 2013224A JP 1322490 A JP1322490 A JP 1322490A JP H03217853 A JPH03217853 A JP H03217853A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- group
- nigrosine dye
- formula
- nigrosine
- 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.)
- Pending
Links
- 125000003710 aryl alkyl group Chemical group 0.000 claims abstract description 4
- 125000003118 aryl group Chemical group 0.000 claims abstract description 4
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 4
- 229920005989 resin Polymers 0.000 claims description 15
- 239000011347 resin Substances 0.000 claims description 15
- 150000002460 imidazoles Chemical class 0.000 claims description 9
- 125000000217 alkyl group Chemical group 0.000 claims description 4
- 239000003086 colorant Substances 0.000 claims description 4
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims 1
- 239000000975 dye Substances 0.000 abstract description 17
- 239000003795 chemical substances by application Substances 0.000 abstract description 6
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 abstract 9
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 8
- 239000000969 carrier Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 3
- 239000006247 magnetic powder Substances 0.000 description 3
- 108091008695 photoreceptors Proteins 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- AAAQKTZKLRYKHR-UHFFFAOYSA-N triphenylmethane Chemical compound C1=CC=CC=C1C(C=1C=CC=CC=1)C1=CC=CC=C1 AAAQKTZKLRYKHR-UHFFFAOYSA-N 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 125000000094 2-phenylethyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])C([H])([H])* 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229920001890 Novodur Polymers 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- ZEEBGORNQSEQBE-UHFFFAOYSA-N [2-(3-phenylphenoxy)-6-(trifluoromethyl)pyridin-4-yl]methanamine Chemical compound C1(=CC(=CC=C1)OC1=NC(=CC(=C1)CN)C(F)(F)F)C1=CC=CC=C1 ZEEBGORNQSEQBE-UHFFFAOYSA-N 0.000 description 1
- 229920006243 acrylic copolymer Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 125000005428 anthryl group Chemical group [H]C1=C([H])C([H])=C2C([H])=C3C(*)=C([H])C([H])=C([H])C3=C([H])C2=C1[H] 0.000 description 1
- 229910000410 antimony oxide Inorganic materials 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- NRBULZLTDKLDBZ-UHFFFAOYSA-N carbonoperoxoic acid;hydrate Chemical compound O.OOC(O)=O NRBULZLTDKLDBZ-UHFFFAOYSA-N 0.000 description 1
- 229920006026 co-polymeric resin Polymers 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 229940125782 compound 2 Drugs 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000007613 environmental effect 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
- 239000010419 fine particle 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
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- -1 hydrotalcites Chemical compound 0.000 description 1
- 229940079865 intestinal antiinfectives imidazole derivative Drugs 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 125000002960 margaryl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000006178 methyl benzyl group Chemical group 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000005561 phenanthryl group Chemical group 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
- 239000000843 powder Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 125000001725 pyrenyl group Chemical group 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
Landscapes
- Developing Agents For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野１
本発明は、電子写真などの分野に用いる静電荷像現１象
用トナーに関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to a toner for electrostatic image development used in fields such as electrophotography.
［従来技術］
電子複写機を初めとする電子写真方法で使用される静電
荷像現像用トナーは、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し
められ、次に転写工程において感光体が転写紙に転写さ
れた後、定着工程においてコピー紙面に定着される。そ
の際、トナーを含む現像剤として、キャリアとトナーと
から成る二成分系現像剤およびキャリアを一必要としな
い一成分系現（象剤（磁性ドナー）が知られている。[Prior Art] Toner for developing an electrostatic image used in an electrophotographic method such as an electronic copying machine is once attached to an image carrier such as a photoreceptor on which an electrostatic image is formed during the development process. Then, in a transfer step, the photoreceptor is transferred to a transfer paper, and then, in a fixing step, it is fixed to the copy paper surface. In this case, as a developer containing toner, a two-component developer consisting of a carrier and a toner and a one-component developer (magnetic donor) which does not require a carrier are known.
そして、従来より現像剤に帯電性を付与するものとして
ニグロシン系染料、４級アンモニウム塩、トリフエニル
メタン系染料等の帯電制御剤やキャノアのコーティング
剤等が知られていた。Charge control agents such as nigrosine dyes, quaternary ammonium salts, and triphenylmethane dyes, canoa coating agents, and the like have been known as agents that impart chargeability to developers.
［発明が解決しようとする課題１
しかしながら、これら従来の帯電制御は帯電性付与効果
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、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、式
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。[Problem to be Solved by the Invention 1] However, these conventional charge controls are not necessarily satisfactory in the effect of imparting chargeability. It is difficult to obtain a toner exhibiting a desirable form, and image stains such as fog occur under high temperature and high humidity conditions or during continuous copying, and the formula has been problematic in that stable copy density cannot be obtained.
本発明者らはかかる問題点を解決すべく鋭意検討した結
果、ニグロシン系染料と特定の構造式で示されるイミダ
ゾール誘導体を併用することにより、好ましい帯電性、
特に正帯電性トナーとして好ましい帯電性を示し、画質
に優れたトナーが得られることを見い出し、本発明に到
達した。The present inventors have made extensive studies to solve these problems, and have found that by using a nigrosine dye and an imidazole derivative represented by a specific structural formula in combination, the present inventors can achieve preferable charging properties.
In particular, it has been found that a toner exhibiting preferable chargeability as a positively chargeable toner and having excellent image quality can be obtained, and the present invention has been achieved.
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トナー
を提供することにある。That is, an object of the present invention is to provide a toner for developing electrostatic images that has excellent charging characteristics and is less subject to deterioration of image quality over time and environment.
［課題を解決するための手段１
しかして、かかる本発明の目的は、少なくとも樹脂、着
色剤、゛ニグロシン系染料および下記一般式（Ｉ）で表
されるイミダゾール誘導体を含有することを特徴とする
静電荷像現像用トナーにより容易に達成される。[Means for Solving the Problems 1] Therefore, the object of the present invention is that the present invention is characterized in that it contains at least a resin, a colorant, a nigrosine dye, and an imidazole derivative represented by the following general formula (I). This can be easily achieved using toner for developing electrostatic images.
（式中、Ｒ１、Ｒ２およびＲ３はそれぞれ水素原子、炭
素数１〜２０のアルキル基、アラルキル基またはアリー
ル基を表す。）
［作用１
以下、本発明を詳細に説明する。(In the formula, R1, R2, and R3 each represent a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aralkyl group, or an aryl group.) [Function 1] The present invention will be explained in detail below.
本発明に用いられるニグロシン系染料としては、公知の
種々のものが使用可能で、例えば、オノエント化学（株
）製ボントロンＮシリーズ、オリエントスピリットブラ
ノクＡＢ、オリエントスピリットブラソクＳＢ１ソルベ
ントブランク＃５、ソルベントブラソク＃７、住友化学
（株）製スピリソトブラックＮｏ． ８５０、スピリソ
トブラソクＮｏ．９００等が挙げられる。Various known nigrosine dyes can be used as the nigrosine dye used in the present invention, such as Bontron N series manufactured by Onoent Chemical Co., Ltd., Orient Spirit Buranok AB, Orient Spirit Blanok SB1 Solvent Blank #5, Solvent Blasoku #7, Spirisoto Black No. manufactured by Sumitomo Chemical Co., Ltd. 850, Spirisotobrasok No. 900 etc. are mentioned.
一方、イミダゾール誘導体としては、前記一般的（Ｉ）
で表される公知の種々の方法により合成された化合物で
あって、代表的な具体例としては次のようなものが挙げ
られる。On the other hand, as the imidazole derivative, the above-mentioned general (I)
Compounds synthesized by various known methods represented by the following are typical examples:
Ｈ
■
一般式（ＩＩ）において、置換基Ｒｌ ， Ｒ２、Ｒ３
としては、水素原子；メチル基、エチル基、プロビル基
、ブチル基、ヘキシル基、ノニル基、ウンデシル基、ド
デシル基、ヘプタデシル基などの分岐をしていてもよい
アルキル基；ベンジル基、フエネチル基、メチルベンジ
ル基などのアラルキル基；フエニル基、ナフチル基、ア
ントリル基、フエナントリル基、ピレニル基などのアリ
ール基が用いられる。H ■ In general formula (II), substituents Rl, R2, R3
Examples include a hydrogen atom; an optionally branched alkyl group such as a methyl group, an ethyl group, a probyl group, a butyl group, a hexyl group, a nonyl group, an undecyl group, a dodecyl group, and a heptadecyl group; a benzyl group, a phenethyl group, Aralkyl groups such as methylbenzyl group; aryl groups such as phenyl group, naphthyl group, anthryl group, phenanthryl group, and pyrenyl group are used.
上記のニグロシン系染料およびイミダゾール誘導体を併
用すると、正の帯電制御剤として特に優れた性質を示す
が、帯電性の正負の別は他の帯電制御剤及び摩擦帯電の
相手方の帯電性にもよるから、本発明は正帯電性トナー
のみに限定されるものではない。When the above-mentioned nigrosine dye and imidazole derivative are used in combination, they exhibit particularly excellent properties as a positive charge control agent, but whether the chargeability is positive or negative depends on the chargeability of other charge control agents and the frictional charging partner. However, the present invention is not limited to positively chargeable toners.
本発明に、使用し得る樹脂成分としては、静電荷像現像
用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、スチレンアンクリル系共重合樹脂
、ポリエステル系樹脂、エポ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ミノ基を有する
もの等が有るが、なかでもスチレン系又はスチレン／ア
クリル系共重合樹脂が好ましい。As the resin component that can be used in the present invention, various known resin components suitable for toners for developing electrostatic images can be used. For example, there are styrene resins, styrene-antrylic copolymer resins, polyester resins, epoxy resins, and mixed resins thereof, as well as those having amino groups in their alkyl side chains. Among these, styrene resins or styrene resins /Acrylic copolymer resin is preferred.
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０．０１〜５重量部、ニグロ
シン系染料は０。０１〜５重量部とし、両者の合計が６
部以下とするのが好ましい。The content of the compound represented by general formula (I) in the toner is:
0.01 to 5 parts by weight for 100 parts by weight of resin, 0.01 to 5 parts by weight for nigrosine dye, and the total of both is 6 parts by weight.
It is preferable that the amount is less than 30%.
本発明で用いる着色剤としては、従来がらトナーに用い
られているものであれば特に制限されるものではなく、
カーボンブランク等を使用する。着色剤の含有量は、樹
脂１００重量部に対して３〜２０重量部とするのが好ま
しい。The colorant used in the present invention is not particularly limited as long as it is conventionally used in toners.
Use carbon blank etc. The content of the colorant is preferably 3 to 20 parts by weight based on 100 parts by weight of the resin.
更に、本発明のトナーには、ニグロシン系染料およびイ
ミダゾール誘導体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４級アンモニウム塩、トリフェニル
メタン系染料、ポリアミン樹脂等を含有せしめてもよい
。Furthermore, the toner of the present invention may contain other charge control agents, including known ones, in addition to nigrosine dyes and imidazole derivatives, such as quaternary ammonium salts, triphenylmethane dyes, polyamine resins, etc. Good too.
その他、本発明のトナー構成成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内添又は外添してもよい。In addition, additives such as low molecular weight olefin polymers and finely powdered silica may be added internally or externally as constituent components of the toner of the present invention in order to improve fixing properties and fluidity.
更に場合によっては、トナー飛散やカブリを防止し、或
は画像濃度の均一改善の目的で、酸化スズー酸化アンチ
モン混合物で表面被覆された酸化チタン微粒子、ハイド
ロタルサイト類を初めとする塩基性マグネシウム．アル
ミニウム．ハイドロオキシ・カーポネート・ハイドレー
ト（ Ｍｇ，ＡＩ，（ＯＨ）ｒ（ＣＯ３）． − ｍＨ
２０ （式中ｐ，ｑｑ ｒおよびＳは２ｐ ＋３ｑ ＝
ｒ ＋ ２ｓを満足する整数を表し、ｍは任意の整数を
表す。））粉末、又はマグネタイト等の磁性粉を添加し
てもよい。Furthermore, in some cases, titanium oxide fine particles whose surface is coated with a tin oxide/antimony oxide mixture, basic magnesium such as hydrotalcites, etc. are used to prevent toner scattering and fogging, or to improve uniformity of image density. aluminum. Hydroxy carbonate hydrate (Mg, AI, (OH)r(CO3). - mH
20 (in the formula, p, qq r and S are 2p + 3q =
represents an integer satisfying r + 2s, and m represents an arbitrary integer. )) powder or magnetic powder such as magnetite may be added.
トナーの製造法としては、上記の各成分をニダー等で混
練し、冷却後、粉砕し分級すればよい。The toner can be produced by kneading the above-mentioned components using a kneader or the like, cooling, pulverizing and classifying.
本発明のトナーは、二成分系現像剤の他にカプセル化ト
ナーや重合トナー及びマグネタイト等の磁性粉を含有し
たトナー等の一成分系現像剤（磁性トナー、非磁性トナ
ー）にも適用することができる。The toner of the present invention can be applied to not only two-component developers but also one-component developers (magnetic toner, non-magnetic toner) such as encapsulated toner, polymerized toner, and toner containing magnetic powder such as magnetite. I can do it.
トナーの平均粒径は５〜２０ ｐｍが好適である。The average particle size of the toner is preferably 5 to 20 pm.
本発明のトナーと混合して現像剤を形成するキャリアと
しては、特に制限はないが１０〜２００μｍの平均粒径
を有する鉄粉、フエライト、マグネタイトキャリアが使
用できる。The carrier to be mixed with the toner of the present invention to form a developer is not particularly limited, but iron powder, ferrite, and magnetite carriers having an average particle size of 10 to 200 μm can be used.
また、これらキャリアは連続使用時の耐久性向上、キャ
リア抵抗の調整の目的でフッ素系樹脂等をコーティング
したコーティングキャリアも使用することができる。こ
の他に、樹脂中に磁性粉を練り込んだ樹脂キャリアも用
いることができる。Furthermore, coated carriers coated with fluororesin or the like can also be used for the purpose of improving durability during continuous use and adjusting carrier resistance. In addition, a resin carrier in which magnetic powder is kneaded into resin can also be used.
これらキャリアは、トナー１重量部に対して５〜１００
重量部使用することが好ましい。These carriers may be used in an amount of 5 to 100 per part by weight of toner.
Preferably, parts by weight are used.
［実施例１
以下実施例により本発明を更に詳細に説明するが、本発
明はその要旨を越えない限り以下の実施例により何んら
制限されるものではない。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
。[Example 1] The present invention will be explained in more detail with reference to Examples below, but the present invention is not limited in any way by the Examples unless the gist thereof is exceeded. In addition, in the following examples, the term "parts" simply means "parts by weight."
（実施例１）
・スチレン系樹脂 ＳＢＭ−６００ （三洋化成（株
）製）１００部
・カーボンブラソク ＃４０（三菱化成（株）製）５
部・ニグロシン系染料 Ｎ−０４（オリエント化学（株
）製） ２部
．イミダゾール誘導体（化合物−２）１部を配合、混線
、粉砕し分級して平均粒径１０ ｐｍの黒色トナーを得
た。得られたトナー４部と平均粒径が約１００ ｐｍの
シリコーン系樹脂で被覆されたフエライトキャリア１０
０部とを混合し、撹拌し現像剤を作成した。(Example 1) - Styrenic resin SBM-600 (manufactured by Sanyo Kasei Co., Ltd.) 100 parts - Carbon Brasok #40 (manufactured by Mitsubishi Kasei Co., Ltd.) 5
Part: Nigrosine dye N-04 (manufactured by Orient Chemical Co., Ltd.) 2 parts. One part of an imidazole derivative (compound-2) was mixed, mixed, crushed, and classified to obtain a black toner having an average particle size of 10 pm. 4 parts of the obtained toner and 10 ferrite carriers coated with a silicone resin having an average particle size of about 100 pm.
0 parts and stirred to prepare a developer.
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３０〜３５°Ｃ／８０〜８５％ＲＨの
高温／高湿の環境条件下で５０，０００枚の実写テスト
を実施した。Next, this developer was subjected to a 50,000-sheet photocopy test under high temperature/high humidity environmental conditions of 30-35°C/80-85% RH using a copying machine that uses an organic photoconductor as a photoreceptor. was carried out.
又、実写テストに使用した補給トナーは、上記現像剤に
用いられたトナーと同一組成物のトナーである。Furthermore, the replenishment toner used in the actual photography test had the same composition as the toner used in the developer described above.
実写テストの結果、５０，０００枚後の実写もコピー白
地部の汚れであるカブリの増加がなく、又−黒地部の杓
一性及び濃度も高く、高温高湿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-action test, after 50,000 copies, there was no increase in fog, which is dirt on the white background, and the black background had high consistency and density, making it durable even in harsh environments of high temperature and humidity. It was an excellent toner and developer.
（実施例２〜６）
用いるニグロ・シン系染料およびイミダゾール誘導体並
びにその種類および使用量を下記表の通りとした以外は
実施例１と全く同様にしたところ、５０，０００枚実写
テスト後もカブリや画像濃度低下のない現像剤が得られ
た。(Examples 2 to 6) The same procedure as in Example 1 was carried out except that the nigro-thin dye and imidazole derivative used, as well as their types and amounts used were as shown in the table below. A developer was obtained that did not cause a decrease in image density or a decrease in image density.
（実施例７）
スチレン系樹脂のかわりにポリエステル樹脂ＨＰ−３１
３（日本合成化学工業（株）製）を使用した以外は実施
例１と全く同様にしたところ、５０，０００枚実写テス
ト後もカブリや画像濃度低下のない現像剤が得られた。(Example 7) Polyester resin HP-31 instead of styrene resin
Example 1 was carried out in exactly the same manner as in Example 1 except that 3 (manufactured by Nippon Gosei Kagaku Kogyo Co., Ltd.) was used, and a developer was obtained that did not cause fogging or decrease in image density even after a 50,000-sheet photographing test.
（比較例１）
実施例１で使用したニグロシン系染料Ｎ−０４を使用し
なかった以外は、実施例１と全く同一組成で５０，００
０枚の実写テストを実施した結果、カブリが増加する等
使用上問題があった。(Comparative Example 1) The composition was exactly the same as in Example 1 except that the nigrosine dye N-04 used in Example 1 was not used.
As a result of conducting a live-action test with 0 sheets, there were problems in use, such as increased fogging.
（比較例２）
実施例１で使用したイミダゾール誘導体（化合物一２）
を使用しなかった以外は、実施例１と全く同一組成で５
０，０００枚の実写テストを実施した結果、カブリが増
加する等使用上問題があった。(Comparative Example 2) Imidazole derivative used in Example 1 (Compound 1 2)
5 with the exact same composition as Example 1 except that 5 was not used.
As a result of a 0,000-photograph test, there were problems in use, such as an increase in fog.
［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が良好で、従来問題となってい
た高温高湿下、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
、多犬な工業的利益を提供するものである。[Effects of the Invention] The electrostatic charge image developing toner of the present invention has good isostatic charging properties that always show appropriate and stable charging properties, and is suitable for copying under high temperature and high humidity conditions or during continuous copying, which has been a problem in the past. It provides a good image regardless of usage conditions, such as less staining and lowering of image density, and provides many industrial benefits.
Claims (1)
び下記一般式（ I ）で表されるイミダゾール誘導体を
含有することを特徴とする静電荷像現像用トナー。 ▲数式、化学式、表等があります▼（ I ） （式中、Ｒ＾１、Ｒ＾２およびＲ＾３はそれぞれ水素原
子、炭素数１〜２０のアルキル基、アラルキル基または
アリール基を表す。）(1) A toner for developing electrostatic images characterized by containing at least a resin, a colorant, a nigrosine dye, and an imidazole derivative represented by the following general formula (I). ▲There are mathematical formulas, chemical formulas, tables, etc.▼(I) (In the formula, R^1, R^2, and R^3 each represent a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aralkyl group, or an aryl group. )
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013224A JPH03217853A (en) | 1990-01-23 | 1990-01-23 | Toner for developing electrostatic images |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013224A JPH03217853A (en) | 1990-01-23 | 1990-01-23 | Toner for developing electrostatic images |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03217853A true JPH03217853A (en) | 1991-09-25 |
Family
ID=11827208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2013224A Pending JPH03217853A (en) | 1990-01-23 | 1990-01-23 | Toner for developing electrostatic images |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03217853A (en) |
-
1990
- 1990-01-23 JP JP2013224A patent/JPH03217853A/en active Pending
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