JP2008158527A - 低融点トナー及び低融点トナーの作製方法 - Google Patents
低融点トナー及び低融点トナーの作製方法 Download PDFInfo
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Abstract
【解決手段】非晶質ポリエステル材料などの非晶質ポリマー材料と、結晶性ポリエステル材料などの結晶性ポリマー材料とから成る結合剤を含むトナーであって、非晶質ポリマー材料の酸価が結晶性ポリマー材料の酸価より大きい。
【選択図】なし
Description
(乳濁液調製の基本手順)
酢酸エチル816.67gを、125gのポリ(プロポキシル化ビスフェノールAフマレート)非晶質樹脂か、あるいは、ブタンジオール、ヘキサンジオール、またはフマル酸から誘導された結晶性樹脂に添加した。ホットプレート上で65℃に加熱し、かつ約200rpmで撹拌することで、樹脂を溶解した。樹脂の溶解後、たとえば重炭酸ナトリウム3.05g(酸価約17のため)などの、適切な量の材料を量って4Lガラス反応器に投入した。その反応器に、脱イオン水708.33gを加えた。その塩基水溶液を、ホットプレート上で65℃に加熱し、約200rpmで撹拌した。塩基水溶液の均質化を、4000rpmで開始した。4000rpmで均質化されつつある塩基水溶液に、溶解した樹脂−酢酸エチル混合物をゆっくりと注いだ。ホモジナイザ速度を10000rpmまで上昇させ、その状態を30分間維持した。均質化された混合物を、熱ジャケット付きのパイレックス社製蒸留器に入れ、約200rpmで撹拌した。温度を、約1℃/分の速度で80℃まで徐々に上昇させた。80℃にて120分間かけて、混合物から酢酸エチルを蒸留した。混合物を40℃未満まで冷却した後、20ミクロンのふるいにかけた。4%NaOH溶液を用いて混合物のpHを7.0に調節し、遠心分離機にかけた。
2リットルのケトルに、前述のポリエステル乳濁液(単数または複数)を投入し、固体10%になるように水で希釈した。2000rpmで撹拌しながら、シアン顔料分散体(トナー重量の4.5%)を上記スラリーにゆっくりと加えた。そこにさらに、0.3Nの硝酸溶液60〜70グラムを加え、硝酸添加の終了時に、ホモジナイザの速度を4500rpmまで上昇させた。この混合物のpHは通常、2.8〜3.4の範囲内である。続いて、混合物を、オーバーヘッド撹拌器で150〜200rpmにて撹拌し、加熱マントル内に配置する。4時間にわたって温度を42〜47℃の範囲内に上昇させ、その間に粒子は7.5〜8.5μmの範囲内まで成長する。そこにさらに、テイカ社のパウダー(Tayca Power)4.5g(17.5%溶液)を加え、続いて、混合物のpHが約6.8〜7になるまで4%水酸化ナトリウムを添加する。この後者の添加の際に、撹拌器の速度を70rpmまで落とす。次に、混合物を、60分間にわたって63〜66℃に加熱する。その後に、粒子が球状化するまで、0.3NのHNO3溶液を用いてpHを6〜6.1に下げる。
65ミクロンPMMAでコーティングされた鉄キャリア100gと、トナー4.5gとを用いて、帯電性のベンチ評価のための現像剤を調製した。現像剤におけるトナー濃度は、4.5%である。2つの現像剤を調製し、異なるゾーン条件を有する2つのチャンバ内にそれぞれ配置した。Aゾーンチャンバは、温度およびRH設定が28℃および85%RHであり、Cゾーンチャンバは、温度およびRH設定が12℃および15%RHである。現像剤の帯電は、5分間の短いペイント振動期間と、60分間の長いペイント振動期間との、2つのステップによって実施される。現像剤は、安定した帯電状態に短い時間で到達し、そのレベルを維持し、帯電時間が長くなるにつれて最低限の変化しか生じないことが、望ましい。
Claims (3)
- 非晶質ポリマー材料と結晶性ポリマー材料とから成る結合剤を含有するトナーであって、
前記非晶質ポリマー材料の酸価が前記結晶性ポリマー材料の酸価より大きい、トナー。 - ポリマー結合剤を含有するトナーであって、
前記結合剤には、非晶質ポリマー材料と結晶性ポリマー材料との両方が含まれ、
前記トナーの最低溶融温度が75〜150℃の範囲内であり、かつ、相対湿度感度が0.5〜10の範囲内である、トナー。 - 非晶質ポリマー材料と結晶性ポリマー材料とから成る結合剤を含有するトナーの作製方法であって、
前記非晶質ポリマー材料の酸価が前記結晶性ポリマー材料の酸価より大きく、
前記非晶質ポリマー材料および前記結晶性ポリマー材料の水性乳濁液を調製することと、
前記水性乳濁液からトナー粒子を凝集させることと、を含む方法。
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Application Number | Priority Date | Filing Date | Title |
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US11/615,056 US7547499B2 (en) | 2006-12-22 | 2006-12-22 | Low melt toner |
US11/615,056 | 2006-12-22 |
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JP2008158527A true JP2008158527A (ja) | 2008-07-10 |
JP5348879B2 JP5348879B2 (ja) | 2013-11-20 |
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JP2007328832A Active JP5348879B2 (ja) | 2006-12-22 | 2007-12-20 | 低融点トナー及び低融点トナーの作製方法 |
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US (1) | US7547499B2 (ja) |
EP (1) | EP1936440B1 (ja) |
JP (1) | JP5348879B2 (ja) |
CN (1) | CN101206416A (ja) |
BR (1) | BRPI0705010A (ja) |
CA (1) | CA2615258C (ja) |
Cited By (2)
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JP2010145995A (ja) * | 2008-12-18 | 2010-07-01 | Xerox Corp | 多面体オリゴマーシルセスキオキサン類を含むトナー |
KR101785740B1 (ko) | 2011-05-11 | 2017-10-16 | 제록스 코포레이션 | 초저용융 토너 |
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JP3491883B2 (ja) | 1999-09-28 | 2004-01-26 | 花王株式会社 | トナー用結着樹脂 |
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2006
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2007
- 2007-12-10 EP EP07122762.3A patent/EP1936440B1/en active Active
- 2007-12-14 CA CA2615258A patent/CA2615258C/en active Active
- 2007-12-20 JP JP2007328832A patent/JP5348879B2/ja active Active
- 2007-12-21 CN CNA2007101621771A patent/CN101206416A/zh active Pending
- 2007-12-26 BR BRPI0705010-0A patent/BRPI0705010A/pt not_active Application Discontinuation
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JP2005077784A (ja) * | 2003-09-01 | 2005-03-24 | Seiko Epson Corp | トナー、およびその製造方法 |
JP2005266317A (ja) * | 2004-03-18 | 2005-09-29 | Fuji Xerox Co Ltd | 静電荷像現像用トナー、静電荷像現像用トナーの製造方法、静電荷像現像剤及び画像形成方法 |
JP2005274614A (ja) * | 2004-03-22 | 2005-10-06 | Fuji Xerox Co Ltd | 画像形成方法及び画像形成装置 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2010145995A (ja) * | 2008-12-18 | 2010-07-01 | Xerox Corp | 多面体オリゴマーシルセスキオキサン類を含むトナー |
KR101785740B1 (ko) | 2011-05-11 | 2017-10-16 | 제록스 코포레이션 | 초저용융 토너 |
Also Published As
Publication number | Publication date |
---|---|
CA2615258A1 (en) | 2008-06-22 |
US20080153027A1 (en) | 2008-06-26 |
EP1936440A2 (en) | 2008-06-25 |
CA2615258C (en) | 2012-05-22 |
EP1936440A3 (en) | 2010-05-05 |
EP1936440B1 (en) | 2018-04-04 |
US7547499B2 (en) | 2009-06-16 |
CN101206416A (zh) | 2008-06-25 |
BRPI0705010A (pt) | 2008-08-12 |
JP5348879B2 (ja) | 2013-11-20 |
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