JP3460738B2 - Method for producing resin for toner - Google Patents

Method for producing resin for toner

Info

Publication number
JP3460738B2
JP3460738B2 JP12509894A JP12509894A JP3460738B2 JP 3460738 B2 JP3460738 B2 JP 3460738B2 JP 12509894 A JP12509894 A JP 12509894A JP 12509894 A JP12509894 A JP 12509894A JP 3460738 B2 JP3460738 B2 JP 3460738B2
Authority
JP
Japan
Prior art keywords
resin
toner
acid
polymerization
producing
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 - Fee Related
Application number
JP12509894A
Other languages
Japanese (ja)
Other versions
JPH07333894A (en
Inventor
政美 ▲鶴▼森
敏行 末吉
重徳 早川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Chemical Corp
Original Assignee
Mitsubishi Chemical Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Chemical Corp filed Critical Mitsubishi Chemical Corp
Priority to JP12509894A priority Critical patent/JP3460738B2/en
Publication of JPH07333894A publication Critical patent/JPH07333894A/en
Application granted granted Critical
Publication of JP3460738B2 publication Critical patent/JP3460738B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Developing Agents For Electrophotography (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、乾式電子写真方式に使
用されるトナー用樹脂に関するものであり、更に詳しく
は連続印字、連続コピー時のトナー飛散性に優れ、かつ
連続印字、連続コピー時の画像濃度安定性に影響を与え
る帯電安定性に優れたトナー用バインダー樹脂を生産性
良く提供するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin for toner used in a dry electrophotographic system, and more specifically, it has excellent toner scattering properties during continuous printing and continuous copying, and during continuous printing and continuous copying. To provide a binder resin for a toner, which is excellent in charging stability and affects the image density stability, with good productivity.

【0002】[0002]

【従来の技術】乾式電子写真法は、一般には光導電性物
質を含む感光体上に種々の手段により静電荷の電気的潜
像を形成し、次いで該潜像を予めキャリアや現像槽の器
壁等との接触で帯電しているトナーで粉像として現像
し、必要に応じて紙などに該粉像を転写した後加熱、加
圧或いは溶剤蒸気などで定着する方法である。
2. Description of the Related Art In the dry electrophotographic method, an electrostatic latent electric image is generally formed on a photoreceptor containing a photoconductive substance by various means, and then the latent image is preliminarily formed in a carrier or a developing tank. This is a method of developing a powder image with a toner charged by contact with a wall or the like, transferring the powder image to paper or the like as required, and then fixing the powder image by heating, pressurizing, or solvent vapor.

【0003】乾式電子写真法のトナーを使用する複写
機、プリンター、ファックス等は急速に普及しており、
トナーの生産量は著しく増加している。乾式電子写真法
用トナーは、バインダー樹脂に着色剤、帯電制御剤など
種々の添加物を溶融混練し、粉砕し、所定の粒度分布に
調整されて作られる。トナーは、トナー用バインダー樹
脂としてビニル系樹脂、ポリエステル樹脂、エポキシ樹
脂などが使用されるが、コスト、生産の容易さ等からビ
ニル系樹脂が全体の9割以上を占めている。
Copiers, printers, fax machines, etc., which use dry electrophotographic toner are rapidly spreading,
Toner production has increased significantly. The toner for dry electrophotography is prepared by melt-kneading a binder resin with various additives such as a colorant and a charge control agent, pulverizing the mixture, and adjusting the particle size distribution to a predetermined value. For the toner, a vinyl resin, a polyester resin, an epoxy resin, or the like is used as a binder resin for the toner, but the vinyl resin accounts for 90% or more of the whole due to cost and ease of production.

【0004】トナー用バインダー樹脂の製造には溶液重
合法、乳化重合法、懸濁重合法等が知られているが、低
コストで製造する方法としては懸濁重合法が最も適して
いる。懸濁重合法によるトナー用バインダー樹脂の製造
方法は、懸濁重合分散剤を含む水に重合性モノマー、重
合開始剤等を加え撹拌しながら昇温し、一定温度で重合
を行い、重合終了後洗浄、脱水、乾燥を経て製品化す
る。
The solution polymerization method, emulsion polymerization method, suspension polymerization method and the like are known for the production of the binder resin for toner, but the suspension polymerization method is most suitable as the production method at low cost. The method for producing a binder resin for a toner by the suspension polymerization method is to add a polymerizable monomer, a polymerization initiator, etc. to water containing a suspension polymerization dispersant, raise the temperature with stirring, and perform polymerization at a constant temperature. It is commercialized through washing, dehydration and drying.

【0005】[0005]

【発明が解決しようとする課題】近年、複写機、プリン
ターの分野においては高速化、小型化の二つの方向があ
り、複写機等に用いられるトナーは、キャリア、帯電ブ
レード、現像槽器壁等で摩擦帯電され、感光体に移動す
るが、高速化、小型化によって摩擦帯電されるトナーの
滞留時間は短くなる。このため、速い帯電の立ち上がり
特性を持つトナーの製造が求められており、トナーの主
成分であるバインダー樹脂中の不純物は、この帯電立ち
上がり特性を阻害する要因の一つである。
In recent years, in the fields of copying machines and printers, there are two directions of speeding up and downsizing. Toners used in copying machines are carriers, charging blades, developing tank walls, etc. The toner is triboelectrically charged and moves to the photosensitive member, but the residence time of the toner that is triboelectrically charged is shortened due to higher speed and smaller size. Therefore, it is required to manufacture a toner having a fast charging rising characteristic, and impurities in the binder resin, which is the main component of the toner, are one of the factors that hinder the charging rising characteristic.

【0006】過酸化物系の重合開始剤を多く使用すると
安息香酸等の分解生成物がバインダー樹脂中に多量に残
存し、これが連続印字、連続コピー時のトナー飛散や画
像濃度に影響を与える帯電の安定性に弊害をもたらす。
この残留安息香酸を除去するためには、特開昭61−1
76603号公報等に記載の苛性ソーダ等のアルカリを
用いた洗浄方法が知られているが、アルカリ洗浄方法は
薬品の取り扱い、コスト等を考慮すると最良の方法とは
言えない。又、アルカリによる洗浄は脱水機の種類(ス
クリューデカンター型)によっては脱水不能に陥ること
もある。
When a large amount of a peroxide type polymerization initiator is used, a large amount of decomposition products such as benzoic acid remain in the binder resin, which affects toner scattering and image density during continuous printing and copying. Adversely affect the stability of.
To remove this residual benzoic acid, JP-A-61-1 is used.
A cleaning method using an alkali such as caustic soda described in Japanese Patent No. 76603 is known, but the alkali cleaning method cannot be said to be the best method in consideration of handling chemicals and cost. In addition, the washing with alkali may not be possible depending on the type of dehydrator (screw decanter type).

【0007】また、懸濁重合法においては懸濁重合分散
剤として水に難溶性、または不溶性の無機粉末が使用さ
れるが、この残留物も帯電の安定性には悪い影響を与え
る。この様な状況から、トナー用バインダー樹脂につい
ては、安息香酸等の重合開始剤からの分解生成物及び懸
濁重合分散剤として使用される無機粉末の除去を低コス
トで生産性良く行うことが強く望まれる。
Further, in the suspension polymerization method, an inorganic powder which is sparingly soluble or insoluble in water is used as a suspension polymerization dispersant, and this residue also adversely affects the stability of charging. Under such circumstances, it is strongly recommended that the binder resin for the toner be removed at a low cost and with good productivity from the decomposition products from the polymerization initiator such as benzoic acid and the inorganic powder used as the suspension polymerization dispersant. desired.

【0008】[0008]

【課題を解決するための手段】そこで本発明者等は重合
開始剤の分解生成物及び懸濁重合分散剤の残留分の少な
いトナー用バインダー樹脂の製造方法を提供すべく鋭意
検討を行った結果、トナー用バインダー樹脂の重合後の
洗浄工程に着目し、酸洗浄工程で懸濁重合分散剤の残留
物を除去し、次いで熱水洗浄工程にて重合開始剤からの
分解生成物の減少、除去を行うことが除去効果が良く、
かつ低コストな製造方法であることを見い出し、本発明
に達した。
Therefore, the inventors of the present invention conducted extensive studies to provide a method for producing a binder resin for a toner in which a decomposition product of a polymerization initiator and a residual amount of a suspension polymerization dispersant are small. Focusing on the cleaning process after polymerization of the binder resin for toner, the residue of the suspension polymerization dispersant is removed in the acid cleaning process, and then the decomposition products from the polymerization initiator are reduced and removed in the hot water cleaning process. The removal effect is good,
Moreover, they have found that the manufacturing method is low-cost and have reached the present invention.

【0009】すなわち本発明の要旨は、トナー用樹脂の
製造方法において、樹脂の重合工程の後に硝酸洗浄工程
及び60〜100℃の熱水洗浄工程を有し、かつ該硝酸
洗浄工程の後に該熱水洗浄工程を有することを特徴とす
るトナー用樹脂の製造方法に存する。以下、本発明を詳
細に説明する。本発明のトナー用樹脂の製造方法を、重
合開始剤及び懸濁重合分散剤を用いて懸濁重合させて製
造する場合を例に説明する。本発明におけるモノマーの
重合工程は例えば以下のように公知の方法で行われる。
[0009] Specifically, the subject matter of the present invention is a method of manufacturing a toner resin, have a nitrate washing and 60 to 100 [° C. hot water washing step after the resin polymerization step, and the nitric acid
To have a heat water washing step after the washing step consists in the production method of the toner resin characterized by. Hereinafter, the present invention will be described in detail. The method for producing the toner resin of the present invention will be described by taking as an example the case of producing by suspension polymerization using a polymerization initiator and a suspension polymerization dispersant. The step of polymerizing the monomer in the present invention is carried out by a known method as follows, for example.

【0010】重合缶にモノマー並びにモノマーに対して
好ましくは1重量部ないし4重量部の水、より好ましく
は1.5重量部ないし3重量部の水を入れる。モノマー
に対して水が少ないと重合時の温度コントロールが困難
であり、逆に水が多いと樹脂製造の効率が悪い。懸濁重
合分散剤は、公知の燐酸カルシウム、タルク、ベントナ
イト、ケイ酸、珪藻土、硫酸バリウム、水酸化アルミニ
ウム、硫酸カルシウム、炭酸バリウム、炭酸マグネシウ
ム、炭酸カルシウム等の難溶性または不溶性無機粉末を
使用するが、添加量は水に対して好ましくは0.5重量
部ないしは5重量部、より好ましくは1重量部ないしは
3重量部である。
The polymerization vessel is charged with the monomer and preferably 1 to 4 parts by weight of water, more preferably 1.5 to 3 parts by weight of water, based on the monomer. When the amount of water is less than that of the monomer, it is difficult to control the temperature during the polymerization. As the suspension polymerization dispersant, known sparingly soluble or insoluble inorganic powders of calcium phosphate, talc, bentonite, silicic acid, diatomaceous earth, barium sulfate, aluminum hydroxide, calcium sulfate, barium carbonate, magnesium carbonate, calcium carbonate and the like are used. However, the addition amount is preferably 0.5 parts by weight to 5 parts by weight, more preferably 1 part by weight to 3 parts by weight with respect to water.

【0011】懸濁重合分散剤の量は、製造される樹脂の
粒度分布に影響を与え、量を多くすると粒径は細かくな
る。重合開始剤としては、過酸化物系の公知の重合開始
剤を使用することが好ましい。その具体例としては、過
酸化ベンゾイル、オクタノニルパーオキシド、デカノニ
ルパーオキシド、ラウロイルパーオキシド、m−トルオ
イルパーオキシドなどが使用される。添加量はモノマー
に対して好ましくは5〜15重量部である。
The amount of the suspension polymerization dispersant affects the particle size distribution of the resin produced, and the larger the amount, the finer the particle size. As the polymerization initiator, it is preferable to use a known peroxide-based polymerization initiator. Specific examples thereof include benzoyl peroxide, octanonyl peroxide, decanoyl peroxide, lauroyl peroxide and m-toluoyl peroxide. The addition amount is preferably 5 to 15 parts by weight with respect to the monomer.

【0012】原料の仕込みが完了したら撹拌しながら昇
温し、好ましくは80℃ないしは110℃、より好まし
くは90℃ないしは100℃で重合する。重合時間は好
ましくは3時間ないしは15時間、より好ましくは5時
間ないしは10時間である。重合時間が短いと樹脂製品
収率及び残留モノマーの除去が悪くなり、重合時間が長
いと樹脂製造効率が悪くなると共に重合開始剤として使
用する過酸化物系重合開始剤の分解生成物が増加すると
いう問題が発生する。
After the raw materials have been charged, the temperature is raised with stirring, and the polymerization is preferably carried out at 80 ° C. to 110 ° C., more preferably 90 ° C. to 100 ° C. The polymerization time is preferably 3 hours to 15 hours, more preferably 5 hours to 10 hours. If the polymerization time is short, the resin product yield and removal of residual monomers will be poor, and if the polymerization time is long, the resin production efficiency will be poor and the decomposition products of the peroxide polymerization initiator used as a polymerization initiator will increase. The problem occurs.

【0013】本発明で最も重要なことは重合が実質的に
終了した後の洗浄工程であり、通常は重合が終了した
後、30℃程度迄冷却してから洗浄工程に入る。本発明
の酸洗浄工程は、公知の樹脂製造方法で得られる樹脂ス
ラリーに必要に応じて脱水後酸を加え、懸濁重合分散剤
として使用した無機粉末を除去するものである。
The most important aspect of the present invention is the washing step after the polymerization is substantially completed, and usually, after the polymerization is completed, the solution is cooled to about 30 ° C. before the washing step. The acid washing step of the present invention is to add an acid after dehydration to a resin slurry obtained by a known resin production method to remove the inorganic powder used as a suspension polymerization dispersant, if necessary.

【0014】用いる酸としては、塩酸、硫酸、硝酸、臭
化水素酸、クロム酸、ヨウ化水素酸、亜硫酸、亜塩素
酸、クエン酸等の強酸、酢酸、ホウ酸、炭酸、フッ酸、
リン酸、亜硝酸等の弱酸を挙げることができる。中でも
特に取り扱い上硝酸が好ましい。また、酸洗浄の際、撹
拌を行うと撹拌効果により除去効果が向上し好ましい。
また、酸添加後のpHが3以下であると、無機粉末除去
効果が向上し、好ましい。
Examples of the acid to be used include strong acids such as hydrochloric acid, sulfuric acid, nitric acid, hydrobromic acid, chromic acid, hydroiodic acid, sulfurous acid, chlorous acid and citric acid, acetic acid, boric acid, carbonic acid, hydrofluoric acid,
Examples thereof include weak acids such as phosphoric acid and nitrous acid. Among them, nitric acid is particularly preferable in terms of handling. Further, it is preferable to stir during the acid washing because the removal effect is improved by the stirring effect.
Further, when the pH after addition of the acid is 3 or less, the effect of removing the inorganic powder is improved, which is preferable.

【0015】酸洗浄の時間は10分〜3時間が好まし
く、10分より短いと無機粉末除去効果が少なく、3時
間より長いと生産効率が悪化する。また、酸洗浄につい
ては、洗浄回数が多いほど除去効果が上がるがコスト上
の問題から2〜3回程度が適当である。本発明の熱水洗
浄工程は、公知の樹脂製造方法で得られる樹脂スラリー
を脱水し、脱水ケーキを熱水で洗浄することにより、安
息香酸等の過酸化物系重合開始剤の分解生成物の除去を
行うものである。
The acid cleaning time is preferably 10 minutes to 3 hours, and if it is shorter than 10 minutes, the effect of removing the inorganic powder is small, and if it is longer than 3 hours, the production efficiency is deteriorated. Further, with respect to the acid cleaning, the removal effect increases as the number of times of cleaning increases, but about 2 to 3 times is suitable from the viewpoint of cost. The hot water washing step of the present invention involves dehydrating the resin slurry obtained by a known resin production method, and washing the dehydrated cake with hot water to obtain a decomposition product of a peroxide-based polymerization initiator such as benzoic acid. It is to be removed.

【0016】熱水を直接脱水ケーキに加えてもよいが、
水を脱水ケーキに加えた後、昇温して熱水にしてもよ
い。熱水とモノマーの比は、モノマー1重量部に対して
熱水が1.5〜3重量部が好ましい。熱水が1.5重量
部より少ないと分散不良により分解生成物の除去効果が
少なく、逆に3重量部より多いと生産効率が悪くなり、
好ましくない。
Although hot water may be added directly to the dehydrated cake,
After adding water to the dehydrated cake, the temperature may be raised to hot water. The ratio of hot water to the monomer is preferably 1.5 to 3 parts by weight of hot water with respect to 1 part by weight of the monomer. If the amount of hot water is less than 1.5 parts by weight, the effect of removing decomposition products is small due to poor dispersion, and conversely, if it is more than 3 parts by weight, the production efficiency becomes poor.
Not preferable.

【0017】熱水の温度は60〜100℃、中でも65
〜85℃が好ましく、60℃より低いと分解生成物の除
去効果が少なく、逆に100℃より高いと缶壁、撹拌羽
根等にスケーリングする為、好ましくない。熱水洗浄の
時間は1〜4時間が好ましく、1時間より短いと分解生
成物の除去効果が少なく、逆に4時間より長いと生産効
率が悪くなり、好ましくない。また、熱水洗浄の際、撹
拌を行うと撹拌効果により分解生成物の除去効果が向上
し、好ましい。
The temperature of hot water is 60 to 100 ° C., especially 65.
It is preferably not higher than 85 ° C., and if it is lower than 60 ° C., the effect of removing decomposition products is small, and conversely, if it is higher than 100 ° C., it scales to the can wall, stirring blade, etc., which is not preferable. The hot water washing time is preferably 1 to 4 hours, and if it is shorter than 1 hour, the effect of removing decomposition products is small, and if it is longer than 4 hours, the production efficiency deteriorates, which is not preferable. Further, it is preferable to perform stirring during washing with hot water, because the stirring effect improves the effect of removing decomposition products.

【0018】但しこの温度及び時間は反応缶、撹拌形
式、使用樹脂等によって異なるので本発明の効果を損な
わない限り限定されるものではない。本発明において
は、特にビニル系樹脂の製造方法であることが好まし
い。ビニル系樹脂とは、少なくともビニル系モノマーに
対応する構造単位を有するものであり、ビニル系モノマ
ーとしては、スチレン、o−メチルスチレン、m−メチ
ルスチレン、p−メチルスチレン、エチルスチレン、プ
ロピルスチレン、フェニルスチレン、メトキシスチレ
ン、α−メチルスチレン、α−エチルスチレン等のスチ
レン類、(メタ)アクリル酸メチル、(メタ)アクリル
酸エチル、(メタ)アクリル酸プロピル、(メタ)アク
リル酸フェニル等の(メタ)アクリル酸エステル類、酢
酸ビニル、プロピオン酸ビニル等のビニルエステル類、
(メタ)アクリロニトリル等の(メタ)アクリル酸類等
を挙げることができる。ビニル系樹脂は単独重合体でも
共重合体でもよい。
However, this temperature and time are not limited as long as they do not impair the effects of the present invention because they vary depending on the reaction can, the stirring type, the resin used, and the like. In the present invention, a method for producing a vinyl resin is particularly preferable. The vinyl-based resin has at least a structural unit corresponding to a vinyl-based monomer, and as the vinyl-based monomer, styrene, o-methylstyrene, m-methylstyrene, p-methylstyrene, ethylstyrene, propylstyrene, Styrenes such as phenylstyrene, methoxystyrene, α-methylstyrene, α-ethylstyrene, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, phenyl (meth) acrylate, etc. (Meth) acrylic acid esters, vinyl acetate, vinyl propionate and other vinyl esters,
Examples thereof include (meth) acrylic acids such as (meth) acrylonitrile. The vinyl resin may be a homopolymer or a copolymer.

【0019】本発明においては、酸洗浄、熱水洗浄いず
れを先に実施してもよいが、酸洗浄を先に行うと熱水洗
浄工程における遠心脱水機等での脱水が容易となり、好
ましい。上記の各洗浄が実質的に終了した後、遠心脱水
機等で脱水し乾燥した後、製品とする。
In the present invention, either acid washing or hot water washing may be carried out first, but acid washing is preferred since dehydration with a centrifugal dehydrator or the like in the hot water washing step is facilitated. After the above washing is substantially completed, the product is dehydrated with a centrifugal dehydrator and dried to obtain a product.

【0020】[0020]

【実施例】以下、実施例により本発明を詳細に説明す
る。なお、本発明は以下の実施例により何ら限定される
ものではない。 実施例1
The present invention will be described in detail below with reference to examples. The present invention is not limited to the following examples. Example 1

【0021】[0021]

【表1】 水 200重量部 スチレンモノマー 80重量部 ブチルアクリレートエステル 20重量部 懸濁重合分散剤(燐酸カルシウム) 2.5重量部 重合開始剤(過酸化ベンゾイル) 8重量部[Table 1] 200 parts by weight of water Styrene monomer 80 parts by weight Butyl acrylate ester 20 parts by weight Suspension polymerization dispersant (calcium phosphate) 2.5 parts by weight Polymerization initiator (benzoyl peroxide) 8 parts by weight

【0022】上記処方を95℃、10時間で重合反応さ
せ、樹脂スラリーを得た。酸洗浄は、洗浄缶に重合され
た樹脂スラリーを移し、樹脂スラリーを撹拌しながら硝
酸を加え、pH1.8で2時間撹拌して懸濁重合分散剤
として使用した燐酸カルシウムの除去を行った。次いで
遠心脱水機で脱水し脱水ケーキを洗浄缶に移し、水をモ
ノマーに対して2倍(重量比)加え樹脂スラリーにし、
熱水洗浄を行った。熱水洗浄の方法は撹拌しながら昇温
し、75℃にて2時間撹拌して、過酸化ベンゾイルの分
解生成物である安息香酸の除去を行った。
The above formulation was polymerized at 95 ° C. for 10 hours to obtain a resin slurry. For acid cleaning, the polymerized resin slurry was transferred to a cleaning can, nitric acid was added to the resin slurry while stirring, and the mixture was stirred at pH 1.8 for 2 hours to remove calcium phosphate used as a suspension polymerization dispersant. Then, spin-dry with a centrifugal dehydrator, transfer the dehydrated cake to a washing can, add water twice as much as the monomer (weight ratio) to make a resin slurry,
It was washed with hot water. In the hot water washing method, the temperature was raised with stirring, and the mixture was stirred at 75 ° C. for 2 hours to remove benzoic acid which is a decomposition product of benzoyl peroxide.

【0023】比較例1 熱水洗浄を行わない以外は実施例1と同様に行った。Comparative Example 1 The same procedure as in Example 1 was performed except that hot water washing was not performed.

【0024】比較例2 熱水洗浄の代わりにアルカリ洗浄を行った以外は実施例
1と同様に行った。アルカリ洗浄の方法は、酸洗浄後の
樹脂スラリーに、撹拌しながら水酸化ナトリウムを加え
pH12.0で2時間撹拌した。
Comparative Example 2 The same procedure as in Example 1 was carried out except that alkali cleaning was carried out instead of hot water cleaning. In the alkali washing method, sodium hydroxide was added to the resin slurry after acid washing while stirring, and the mixture was stirred at pH 12.0 for 2 hours.

【0025】比較例3 酸洗浄とアルカリ洗浄の順番を変えた以外は比較例2と
同様に行った。
Comparative Example 3 The procedure of Comparative Example 2 was repeated except that the order of acid cleaning and alkali cleaning was changed.

【0026】以上の洗浄工程を経て得られた樹脂スラリ
ーを遠心脱水機にて脱水し、以下の方法により安息香
酸、Ca、Pの定量を行った。 <分析方法> 安息香酸:ガスクロマトグラフィー法 Ca:原子吸光光度法 P:吸光光度法 結果を表1に示す。
The resin slurry obtained through the above washing steps was dehydrated by a centrifugal dehydrator, and benzoic acid, Ca and P were quantified by the following method. <Analysis method> Benzoic acid: Gas chromatography method Ca: Atomic absorption spectrophotometric method P: Absorption spectrophotometric method The results are shown in Table 1.

【0027】[0027]

【表2】 [Table 2]

【0028】実施例2 実施例1によって得られた樹脂を用いて、平均粒径約1
0μmの黒色トナーを作り、1分間40枚の複写機を用
いてランニング評価を行った結果、表2の様な良好な結
果が得られた。
Example 2 Using the resin obtained in Example 1, an average particle size of about 1
As a result of making a black toner of 0 μm and performing running evaluation using a copying machine of 40 sheets for 1 minute, good results as shown in Table 2 were obtained.

【0029】[0029]

【表3】 注)画像濃度はマクベス社反射濃度計RD−914型、
かぶりは日本電色社 白度計Σ−80型にて測定した。
トナー飛散量は一定場所への飛散量を計測して比較し
た。
[Table 3] Note) Image density is Macbeth reflection densitometer RD-914 type,
The fogging was measured with a whiteness meter Σ-80 type manufactured by Nippon Denshoku Co., Ltd.
The amount of toner scattering was compared by measuring the amount of scattering to a certain place.

【0030】比較例4 比較例3で得られた樹脂を使用する以外は実施例2と全
く同様にテストした結果かぶりが高く、トナー消費量も
多く、トナー飛散量も多い結果となった。
Comparative Example 4 As a result of the same test as in Example 2 except that the resin obtained in Comparative Example 3 was used, the fog was high, the toner consumption was large, and the toner scattering amount was large.

【0031】[0031]

【表4】 [Table 4]

【0032】[0032]

【発明の効果】本発明は、帯電安定性に優れ、画像濃度
変化及びかぶりがなく、機内での飛散量及び消費量の少
ないトナーを与えることの可能なトナー用樹脂の製造方
法を提供するものである。
Industrial Applicability The present invention provides a method for producing a toner resin, which is capable of giving a toner having excellent charge stability, no image density change and fog, and a small amount of scattering and consumption in an apparatus. Is.

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭61−176604(JP,A) 特開 昭61−176603(JP,A) 特開 平5−5731(JP,A) 特開 平2−2577(JP,A) 特開 平1−200270(JP,A) (58)調査した分野(Int.Cl.7,DB名) G03G 9/08 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 61-176604 (JP, A) JP 61-176603 (JP, A) JP 5-5731 (JP, A) JP 2- 2577 (JP, A) JP-A-1-200270 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) G03G 9/08

Claims (5)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 トナー用樹脂の製造方法において、樹脂
の重合工程の後に硝酸洗浄工程及び60〜100℃の熱
水洗浄工程を有し、かつ該硝酸洗浄工程の後に該熱水洗
浄工程を有することを特徴とするトナー用樹脂の製造方
法。
1. A method for producing a toner resin, have a nitrate washing and 60 to 100 [° C. hot water washing step after the resin polymerization step, and heat water washing after the nitric acid washing step
Method for producing a toner resin characterized by have a purification step.
【請求項2】 樹脂の重合工程において、懸濁重合法を
用いることを特徴とする請求項1に記載のトナー用樹脂
の製造方法。
2. The method for producing a toner resin according to claim 1, wherein a suspension polymerization method is used in the resin polymerization step.
【請求項3】 樹脂の重合工程において、懸濁重合分散
剤を用いることを特徴とする請求項2に記載のトナー用
樹脂の製造方法。
3. The method for producing a resin for toner according to claim 2, wherein a suspension polymerization dispersant is used in the resin polymerization step.
【請求項4】 樹脂の重合工程において、過酸化物系重
合開始剤を用いることを特徴とする請求項1乃至3のい
ずれかに記載のトナー用樹脂の製造方法。
4. A resin polymerization step, claims 1 to 3 gall is characterized by using a peroxide polymerization initiator
The method for producing a toner resin according to any one of the above.
【請求項5】 ビニル系樹脂の製造方法であることを特
徴とする請求項1乃至4のいずれかに記載のトナー用樹
脂の製造方法。
5. The process for producing toner resin according to any one of claims 1 to 4, characterized in that a method for producing a vinyl resin.
JP12509894A 1994-06-07 1994-06-07 Method for producing resin for toner Expired - Fee Related JP3460738B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12509894A JP3460738B2 (en) 1994-06-07 1994-06-07 Method for producing resin for toner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12509894A JP3460738B2 (en) 1994-06-07 1994-06-07 Method for producing resin for toner

Publications (2)

Publication Number Publication Date
JPH07333894A JPH07333894A (en) 1995-12-22
JP3460738B2 true JP3460738B2 (en) 2003-10-27

Family

ID=14901811

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP3460738B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3443980B2 (en) * 1994-10-17 2003-09-08 三菱化学株式会社 Method for producing resin for toner
WO2007011017A1 (en) * 2005-07-22 2007-01-25 Kuraray Co., Ltd. Method of taking (meth)acrylic ester polymer out of liquid reaction mixture
JP5378843B2 (en) * 2009-03-19 2013-12-25 積水化成品工業株式会社 Method for producing (meth) acrylic ester resin particles
JP5575683B2 (en) * 2011-03-10 2014-08-20 株式会社沖データ Developer, developer container, image forming apparatus, and developer manufacturing method

Also Published As

Publication number Publication date
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