JPS63161455A - Toner for electrostatic development - Google Patents
Toner for electrostatic developmentInfo
- Publication number
- JPS63161455A JPS63161455A JP61312708A JP31270886A JPS63161455A JP S63161455 A JPS63161455 A JP S63161455A JP 61312708 A JP61312708 A JP 61312708A JP 31270886 A JP31270886 A JP 31270886A JP S63161455 A JPS63161455 A JP S63161455A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- styrene
- binder resin
- weight
- isoprene copolymer
- 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
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000011230 binding agent Substances 0.000 claims abstract description 17
- 229920005989 resin Polymers 0.000 claims abstract description 17
- 239000011347 resin Substances 0.000 claims abstract description 17
- 229920001577 copolymer Polymers 0.000 claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Natural products CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000003086 colorant Substances 0.000 claims abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 239000000975 dye Substances 0.000 description 5
- 230000009477 glass transition Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 229920001909 styrene-acrylic polymer Polymers 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 108091008695 photoreceptors Proteins 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- DTCCVIYSGXONHU-CJHDCQNGSA-N (z)-2-(2-phenylethenyl)but-2-enedioic acid Chemical compound OC(=O)\C=C(C(O)=O)\C=CC1=CC=CC=C1 DTCCVIYSGXONHU-CJHDCQNGSA-N 0.000 description 2
- GLUUGHFHXGJENI-UHFFFAOYSA-N Piperazine Chemical compound C1CNCCN1 GLUUGHFHXGJENI-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- FWLHAQYOFMQTHQ-UHFFFAOYSA-N 2-N-[8-[[8-(4-aminoanilino)-10-phenylphenazin-10-ium-2-yl]amino]-10-phenylphenazin-10-ium-2-yl]-8-N,10-diphenylphenazin-10-ium-2,8-diamine hydroxy-oxido-dioxochromium Chemical compound O[Cr]([O-])(=O)=O.O[Cr]([O-])(=O)=O.O[Cr]([O-])(=O)=O.Nc1ccc(Nc2ccc3nc4ccc(Nc5ccc6nc7ccc(Nc8ccc9nc%10ccc(Nc%11ccccc%11)cc%10[n+](-c%10ccccc%10)c9c8)cc7[n+](-c7ccccc7)c6c5)cc4[n+](-c4ccccc4)c3c2)cc1 FWLHAQYOFMQTHQ-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000000987 azo dye Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000006233 lamp black Substances 0.000 description 1
- MOUPNEIJQCETIW-UHFFFAOYSA-N lead chromate Chemical compound [Pb+2].[O-][Cr]([O-])(=O)=O MOUPNEIJQCETIW-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000767 polyaniline Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 229930187593 rose bengal Natural products 0.000 description 1
- AZJPTIGZZTZIDR-UHFFFAOYSA-L rose bengal Chemical compound [K+].[K+].[O-]C(=O)C1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1C1=C2C=C(I)C(=O)C(I)=C2OC2=C(I)C([O-])=C(I)C=C21 AZJPTIGZZTZIDR-UHFFFAOYSA-L 0.000 description 1
- 229940081623 rose bengal Drugs 0.000 description 1
- STRXNPAVPKGJQR-UHFFFAOYSA-N rose bengal A Natural products O1C(=O)C(C(=CC=C2Cl)Cl)=C2C21C1=CC(I)=C(O)C(I)=C1OC1=C(I)C(O)=C(I)C=C21 STRXNPAVPKGJQR-UHFFFAOYSA-N 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 150000005846 sugar alcohols Chemical class 0.000 description 1
- 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 1
- XOSXWYQMOYSSKB-LDKJGXKFSA-L water blue Chemical compound CC1=CC(/C(\C(C=C2)=CC=C2NC(C=C2)=CC=C2S([O-])(=O)=O)=C(\C=C2)/C=C/C\2=N\C(C=C2)=CC=C2S([O-])(=O)=O)=CC(S(O)(=O)=O)=C1N.[Na+].[Na+] XOSXWYQMOYSSKB-LDKJGXKFSA-L 0.000 description 1
- 229910000859 α-Fe Inorganic materials 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
- G03G9/087—Binders for toner particles
- G03G9/08702—Binders for toner particles comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- G03G9/08737—Polymers derived from conjugated dienes
-
- 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
- G03G9/087—Binders for toner particles
- G03G9/08702—Binders for toner particles comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- G03G9/08706—Polymers of alkenyl-aromatic compounds
- G03G9/08708—Copolymers of styrene
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、複写機、プリンタ等に使用されている電子写
真法による画像担体上の静電荷像を現像するトナーに関
するものであり、特に画質、定着性および保存性を改良
した静電現像用トナーに関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a toner for developing an electrostatic charge image on an image carrier by electrophotography used in copying machines, printers, etc. , relates to an electrostatic development toner with improved fixability and storage stability.
従来、電子写真法においては、例えば光導電性物質を利
用した感光体の表面を一様帯電させた後、画像情報と対
応する露光により、感光体の表面に選択的に静電荷像を
形成し、別途摩擦帯電手段を介して静電荷を付与したト
ナーを前記静電荷像と接触させて顕像化したトナー像を
形成し、以後記録紙等にトナー像を転写し、熱若しくは
圧力手段を介して定着させて可視画像を得るのが一般的
である。この場合において使用するトナーは、少な（と
もバインダー樹脂、オフセット防止剤、着色剤および帯
電制御剤からなり、特に前記トナー像をヒートロール等
の熱的手段を介して定着させるトナーのバインダー樹脂
としては、一般にスチレン−アクリル共重合体、スチレ
ン−マレイン酸、スチレン−ブタジェン共重合体、ポリ
エステル樹脂等が使用されている（例えば特公昭５５−
６８９５号、特公昭５７−１２１４７号、特開昭５７−
５０５２号公報参照）。Conventionally, in electrophotography, the surface of a photoreceptor is uniformly charged using, for example, a photoconductive substance, and then an electrostatic charge image is selectively formed on the surface of the photoreceptor by exposure corresponding to image information. , a toner to which an electrostatic charge has been separately applied via a frictional charging means is brought into contact with the electrostatic charge image to form a visualized toner image, and the toner image is then transferred to a recording paper or the like, and is then charged via heat or pressure means. It is common to obtain a visible image by fixing the image. The toner used in this case consists of a small amount of binder resin, an anti-offset agent, a colorant, and a charge control agent. Generally, styrene-acrylic copolymer, styrene-maleic acid, styrene-butadiene copolymer, polyester resin, etc. are used (for example,
No. 6895, Japanese Patent Publication No. 12147-1987, Japanese Patent Publication No. 1987-12147
(See Publication No. 5052).
上記バインダー樹脂を使用するトナーのうち、スチレン
−アクリル共重合体若しくはスチレン−マレイン酸を使
用するものにおいては、ガラス転移温度が高く溶融粘度
が低いため、保存性と定着性とのバランスを確保し易い
という長所があるが、一方において、耐環境安定性、転
写効率、画像の鮮明度等の特性が劣るという問題点があ
る。またｌ使用するトナーは、画像濃度、オフセント性
等においては優れているものの、ガラス転移温度が低い
ので保存性が低いという問題点がある。Among the toners using the above binder resins, those using styrene-acrylic copolymer or styrene-maleic acid have a high glass transition temperature and low melt viscosity, so it is difficult to maintain a balance between storage stability and fixability. Although it has the advantage of being easy to use, it also has the problem of poor characteristics such as environmental stability, transfer efficiency, and image clarity. Furthermore, although the toner used is excellent in image density, offset, etc., it has a problem of poor storage stability due to its low glass transition temperature.
本発明は、上記従来のものに存在する問題点を解決し、
画像の鮮明度、オフセット性および耐環境安定性におい
て優れた静電現像用トナーを提供することを目的とする
ものである。The present invention solves the problems existing in the conventional ones,
The object of the present invention is to provide a toner for electrostatic development that is excellent in image clarity, offset properties, and environmental stability.
上記問題点を解決するため、本発明においては、少なく
ともバインダー樹脂、着色斉工および帯電制御剤からな
る静電現像用トナーにおいて、バインダー樹脂としてス
チレン−イソプレン共重合体を含有させる、という技術
的手段を採用したのである。In order to solve the above-mentioned problems, the present invention provides a technical means of containing a styrene-isoprene copolymer as a binder resin in an electrostatic development toner comprising at least a binder resin, a coloring agent, and a charge control agent. was adopted.
本発明において、バインダー樹脂は定着性確保の点から
トナー中に８０重盪％以上添加するが、スチレン−イソ
プレン共重合体の含有量がバインダー樹脂の２５重重量
未満では、画像濃度が低下し、特に高温時における低下
が著しいのみならず、画像の鮮明度および耐オフセット
性が低下するため好ましくない。In the present invention, the binder resin is added to the toner in an amount of 80% by weight or more in order to ensure fixing properties, but if the content of the styrene-isoprene copolymer is less than 25% by weight of the binder resin, the image density will decrease. In particular, this is not preferable because not only the decrease is significant at high temperatures, but also the sharpness of the image and offset resistance are decreased.
またスチレン−イソプレン共重合体中のスチレン量が９
５重量％を越えると、ガラス転移温度が高くなり過ぎ（
７５〜８５℃）、定着性が低下するため好ましくない、
一方上記スチレン量が７０重量％未満では、ガラス転移
温度が低くなり過ぎ（６０℃）、保存性を低下させるた
め好ましくない。なおスチレン−イソプレン共重合体の
重量平均分子量（Ｍｗ）および数平均分子ｆｉ （ＭＷ
）は、ガラス転移温度と正の相関があり、大き過ぎる
と定着性が低下し、小さ過ぎると保存性を損なうため好
ましくないので、各々ｓｏ、ｏｏｏ〜２００．０００お
よびｔｏ、ｏｏｏ〜５０．０００の範囲とする。Also, the amount of styrene in the styrene-isoprene copolymer is 9
If it exceeds 5% by weight, the glass transition temperature will become too high (
75 to 85°C), which is undesirable because it reduces fixing properties.
On the other hand, if the amount of styrene is less than 70% by weight, the glass transition temperature becomes too low (60° C.), which deteriorates storage stability, which is not preferable. Note that the weight average molecular weight (Mw) and number average molecular weight fi (MW
) have a positive correlation with the glass transition temperature, and if it is too large, the fixing property will deteriorate, and if it is too small, it will impair the storage stability, so it is not preferable. The range shall be .
本発明のトナーは、バインダー樹脂の他に次のような成
分を含有する。The toner of the present invention contains the following components in addition to the binder resin.
ヒートロール定着においては耐オフセット性の良いこと
が要求されるので、ポリオレフィン、脂肪酸金属塩、多
価アルコールエステルなどをオフセット防止剤として添
加する。好ましいオフセット防止剤としては、Ｍ％１が
１万以下の低分子量ポリオレフィン（例えばポリエチレ
ンやポリプロピレン）が挙げられる。オフセット防止剤
の添加量は１〜５重量％の範囲がよい。１重量％未満で
はその効果が少なく、５重量％を越えるとトナーの流動
性が低下する。Since heat roll fixing requires good offset resistance, polyolefins, fatty acid metal salts, polyhydric alcohol esters, and the like are added as anti-offset agents. Preferred anti-offset agents include low molecular weight polyolefins (for example polyethylene and polypropylene) having an M%1 of 10,000 or less. The amount of the anti-offset agent added is preferably in the range of 1 to 5% by weight. If it is less than 1% by weight, the effect will be small, and if it exceeds 5% by weight, the fluidity of the toner will decrease.
着色剤としては、カーボンブラック、アニリンブルー、
クロムイエロー、ランプブラック、アニリンブラック、
ローズベンガル等の種々の顔料又は染料を用い得る。こ
れらは、充分な濃度のトナー像を得るために通常１〜２
０重量％の範囲で添加される。Colorants include carbon black, aniline blue,
Chrome yellow, lamp black, aniline black,
Various pigments or dyes may be used, such as rose bengal. These are usually 1 to 2 times in order to obtain a toner image of sufficient density.
It is added in a range of 0% by weight.
トナーの帯電特性を制御する目的で、種々の帯電制御剤
が添加される。例えば、正の帯電制御剤としてはニグロ
シン染料、トリフェニルメタン系染料、ピペラジン系ポ
リマー等が、負の帯電制御剤としては含金属（Ｃｒ）ア
ゾ染料が挙げられる。Various charge control agents are added for the purpose of controlling the charge characteristics of the toner. For example, positive charge control agents include nigrosine dyes, triphenylmethane dyes, piperazine polymers, etc., and negative charge control agents include metal-containing (Cr) azo dyes.
添加量は、少ないとその効果が少なく、多いとトナーの
流動性が低下するので１〜５重量％の範囲がよい。The addition amount is preferably in the range of 1 to 5% by weight, since a small amount will result in little effect, and a large amount will reduce the fluidity of the toner.
またトナーの流動性や感光体に対する耐剛性を向上させ
るために、トナーの内部及び／又は表面に疎水性シリカ
微粉末を添加してもよい。その場合の添加量は、少ない
と効果がなく、多いとトナーの帯電が不安定になるので
０．１〜５重量％の範囲がよい。Furthermore, in order to improve the fluidity of the toner and the rigidity resistance to the photoreceptor, hydrophobic silica fine powder may be added inside and/or on the surface of the toner. In this case, the amount added is preferably in the range of 0.1 to 5% by weight, because if it is too small, there will be no effect, and if it is too large, the charging of the toner will become unstable.
本発明のトナーの製造は、例えば、原料をボールミル等
により予備混合し、ニーダ等により溶融混練し、冷却固
化後シェフ）ミル等で粉砕し、所定の粒度に分級して得
られる。トナーの平均粒径は５〜１５μｍの範囲がよい
、５μｍより小さいと現像性が低下し、一方１５μｍよ
り大きいと画像のざらつきが顕著になるため不都合であ
る。The toner of the present invention can be produced, for example, by premixing raw materials using a ball mill or the like, melting and kneading them using a kneader or the like, cooling and solidifying them, pulverizing them using a chef's mill or the like, and classifying them into a predetermined particle size. The average particle size of the toner is preferably in the range of 5 to 15 μm; if it is smaller than 5 μm, the developability will deteriorate, while if it is larger than 15 μm, the roughness of the image will become noticeable, which is disadvantageous.
〔実施例１〕
使用原料
（１）スチレン−イソプレン共重合体 ８６重量％スチ
レン／イソプレン比＝９（Ｌ／１０Ｍｗ ＝９０，００
０ Ｍ、Ｉ＝２０，０００（２）オフセント防止剤：
ポリプロピ１２２重量％三洋化成 ビスコール５５０Ｐ
（３） カーボンブラック １０重量％
三菱化成 ＃５０
（４） 荷電制御剤ニクロム錯体染料 ２重量％
オリエント化学 ボントロンＥ８１
上記配合の原料を加熱ローラを有するニーダで３０分間
混練後、粉砕、分級を行ない、５〜２０μｍの粒度分布
を有するトナーを得た。このトナーとフェライトキャリ
ア（日立金属製 ＫＢＮ−１００）とを混合してトナー
濃度４％の現像剤を作成し、市販のＵ Ｂ ｉ ｘ３０
００機を使用して画像評価をしたところ、画質、定着性
、オフセット性および保存性が極めて良好であることを
確認した。[Example 1] Raw materials used (1) Styrene-isoprene copolymer 86% by weight Styrene/isoprene ratio = 9 (L/10Mw = 90,00
0 M, I=20,000 (2) Offcent prevention agent:
Polypropy 122% by weight Sanyo Chemical Viscoel 550P (3) Carbon black 10% by weight
Mitsubishi Kasei #50 (4) Charge control agent nichrome complex dye 2% by weight
Orient Chemical Bontron E81 The raw materials of the above composition were kneaded for 30 minutes in a kneader equipped with a heating roller, and then pulverized and classified to obtain a toner having a particle size distribution of 5 to 20 μm. This toner and a ferrite carrier (KBN-100 manufactured by Hitachi Metals) were mixed to create a developer with a toner concentration of 4%, and a commercially available U B i x30 was prepared.
When the image was evaluated using a 00 machine, it was confirmed that the image quality, fixing property, offset property and storage stability were extremely good.
〔実施例２〕
バインダー樹脂としてスチレン−イソプレン共重合体（
スチレン／イソプレン比−８５／１５、ＭＷ ＝１５０
．０００ ＭＮ ＝１８，０００りとスチレン−アクリ
ル共重合体（三洋化成 ハイマー ＳＢＭ７３）との混
合物を使用し、両者の配合比を表のようにしてトナーを
作成して画像評価した。パイ、ンダー樹脂以外は前記実
施例１と同様である。[Example 2] Styrene-isoprene copolymer (
Styrene/isoprene ratio -85/15, MW = 150
．． A toner was prepared using a mixture of 000 MN = 18,000 and a styrene-acrylic copolymer (Sanyo Kasei Hymer SBM73) with the blending ratio of the two as shown in the table, and image evaluation was performed. The same as in Example 1 except for the pie and under resins.
（注）（１）配合比は ５ｔ−Ｉｐ ／５ｔ−Ａｃ比（
２）通常時 ２０℃×６０％Ｒ」。(Note) (1) The blending ratio is 5t-Ip/5t-Ac ratio (
2) Normal condition: 20°C x 60%R.
高湿時 ３０℃Ｘ８０％Ｒ」。30℃ x 80%R at high humidity.
（３）保存性 ５５℃ 恒温槽で評価
（４）０ 良好、 Δ 不可
表から明らかなように、５ｔ−Ｔｐ ／５ｔ−Ａｃ比が
０／１００のもの、すなわち従来のスチレン−アクリル
共重合体をバインダーとするトナーによるものにおいて
は、画像濃度が低く、特に３０℃×８０％Ｒ」、の高湿
時においてその低下が著しい。(3) Storage stability Evaluated in a constant temperature bath at 55°C (4) 0 Good, Δ Not available As is clear from the table, the 5t-Tp/5t-Ac ratio is 0/100, that is, the conventional styrene-acrylic copolymer. In the case of a toner using a binder, the image density is low, and the decrease is particularly noticeable at high humidity of 30° C. x 80% R.
また画像の鮮明度およびオフセット性についても著しく
低下している。これに対してスチレン−イソプレン共重
合体をバインダー樹脂中に含有するトナーによるものに
おいては、高温時においても画像濃度の低下が極めて小
であると共に、他の評価項目においても好ましい結果を
示している。Furthermore, the sharpness of the image and the offset property are also significantly reduced. On the other hand, toners containing a styrene-isoprene copolymer in the binder resin showed very little decrease in image density even at high temperatures, and also showed favorable results in other evaluation items. .
〔実施例３〕 下記原料を使用して一成分系の磁性トナーを作成した。[Example 3] A one-component magnetic toner was prepared using the following raw materials.
（１）マグネタイト ５０重量％戸
田工業 ＥＰＴ５００
（２）スチレン−イソプレン共重合体 ４６重量％（実
施例１と同様）
（３）オフセット防止剤 ２重量％（実
施例１と同様）
（４）染料 ２重量％（実
施例１と同様）
上記磁性トナーをリコーＦＴ４７００機により画像質、
オフセット性および耐環境安定性において優れた特性を
有することを確認した。(1) Magnetite 50% by weight Toda Kogyo EPT500 (2) Styrene-isoprene copolymer 46% by weight (same as Example 1) (3) Offset inhibitor 2% by weight (same as Example 1) (4) Dye 2 Weight% (same as Example 1) The above magnetic toner was tested for image quality and quality using a Ricoh FT4700 machine.
It was confirmed that it has excellent properties in terms of offset resistance and environmental stability.
本発明は、以上記述のような構成および作用であるから
、画質、定着性、オフセット性および保存性を掘めて大
幅に向上させることができるという効果がある。Since the present invention has the structure and operation described above, it has the advantage that image quality, fixing properties, offset properties, and storage stability can be greatly improved.
特許出廓人 日立金属株式会社Patent distributor: Hitachi Metals, Ltd.
Claims (3)
御剤からなる静電現像用トナーにおいて、バインダー樹
脂としてスチレン−イソプレン共重合体を含有させたこ
とを特徴とする静電現像用トナー。(1) An electrostatic development toner comprising at least a binder resin, a colorant, and a charge control agent, the toner containing a styrene-isoprene copolymer as the binder resin.
体の含有量が２５重量％以上である特許請求の範囲第１
項記載の静電現像用トナー。(2) The content of the styrene-isoprene copolymer in the binder resin is 25% by weight or more, Claim 1
Toner for electrostatic development as described in section.
ソプレンが重量比で７０／３０〜９５／５であり、重量
平均分子量（Ｍ＿Ｗ）＝５０，０００〜２００，０００
、数平均分子量（Ｍ＿Ｎ）＝１０，０００〜５０，００
０である特許請求の範囲第１項若しくは第２項記載の静
電現像用トナー。(3) The weight ratio of styrene/isoprene in the styrene-isoprene copolymer is 70/30 to 95/5, and the weight average molecular weight (M_W) is 50,000 to 200,000.
, number average molecular weight (M_N) = 10,000 to 50,00
0. The toner for electrostatic development according to claim 1 or 2, which is 0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61312708A JPS63161455A (en) | 1986-12-24 | 1986-12-24 | Toner for electrostatic development |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61312708A JPS63161455A (en) | 1986-12-24 | 1986-12-24 | Toner for electrostatic development |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63161455A true JPS63161455A (en) | 1988-07-05 |
Family
ID=18032466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61312708A Pending JPS63161455A (en) | 1986-12-24 | 1986-12-24 | Toner for electrostatic development |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63161455A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1077394A1 (en) * | 1999-08-12 | 2001-02-21 | Zimmer, Michael | Process for transfer of toner and toner containing vulcanizable rubber material and/ or rubber material |
-
1986
- 1986-12-24 JP JP61312708A patent/JPS63161455A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1077394A1 (en) * | 1999-08-12 | 2001-02-21 | Zimmer, Michael | Process for transfer of toner and toner containing vulcanizable rubber material and/ or rubber material |
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