JP2011064768A5

JP2011064768A5 -

Info

Publication number: JP2011064768A5
Application number: JP2009213105A
Authority: JP
Filing date: 2009-09-15
Publication date: 2012-11-01
Anticipated expiration: 2029-09-15

Description

本発明は、少なくとも重合性単量体とハイブリッド樹脂を含有するハイブリッド樹脂混合物を水系媒体中で重合して得られるトナー粒子と、無機微粉体とを有するトナーであって、
該ハイブリッド樹脂は少なくともビニル系重合体ユニットと、ポリエステルユニットが化学的に結合した分子構造を持つ樹脂を含有し、
該ハイブリッド樹脂は、重クロロホルム溶媒を用いた¹Ｈ−ＮＭＲの測定において、４．６ｐｐｍ以上４．９ｐｐｍ以下と５．０ｐｐｍ以上５．２ｐｐｍ以下にピークを有することを特徴とするトナーに関する。 The present invention provides a toner having toner particles obtained by a hybrid resin mixture containing at least a polymerizable monomer and a hybrid resin polymerized in an aqueous medium, and an inorganic fine powder,
The hybrid resin contains at least a resin having a molecular structure in which a vinyl polymer unit and a polyester unit are chemically bonded,
The hybrid resin is in the measurement of ¹ H-NMR using heavy chloroform solvent, a toner which is characterized by having a peak in 5.2ppm or 4.9ppm or less and 5.0ppm least 4.6 ppm.

該トナー粒子の１００℃での粘度をη１００（Ｐａ・ｓ）とし、１１０℃での粘度をη１１０（Ｐａ・ｓ）としたとき、下記式：
ＡηＴ＝｛ｌｏｇ（η１１０）−ｌｏｇ（η１００）｝／（１１０−１００）
で表される平均粘度変化量ＡηＴが０．０００≧ＡηＴ≧−０．０６４を満たし、η１００が１００００Ｐａ・ｓ以上５００００Ｐａ・ｓ以下であると好ましい。 When the viscosity of the toner particles at 100 ° C. is η100 (Pa · s) and the viscosity at 110 ° C. is η110 (Pa · s), the following formula:
AηT = { log (η110) −log (η100) } / (110-100)
It is preferable that the average viscosity change amount AηT represented by the following formula satisfies 0.000 ≧ AηT ≧ −0.064, and η100 is 10000 Pa · s or more and 50000 Pa · s or less.

また、本発明のトナーは、１００℃から１１０℃までの１℃当たりの平均粘度変化量を示すＡηＴ＝｛ｌｏｇ（η１１０）−ｌｏｇ（η１００）｝／（１１０−１００）が−０．０６４乃至０．０００であり、より好ましくは−０．０６０乃至０．０００である。かかる要件を満たすことによって、本発明のトナーは、低温定着性に優れ、また高く、安定した光沢度を有する画像が得られ、その性能を維持したまま耐高温オフセット性と耐久性に優れた性能を示す。 In the toner of the present invention, AηT = { log (η110) −log (η100) } / (110-100) indicating −1.064 to −0.064 indicating an average viscosity change amount per 1 ° C. from 100 ° C. to 110 ° C. 0.000, more preferably −0.060 to 0.000. By satisfying such requirements, the toner of the present invention is excellent in low-temperature fixability, and has an image having high and stable glossiness, and has excellent high-temperature offset resistance and durability while maintaining its performance. Indicates.

Claims

A toner having at least toner particles obtained hybrid resin mixture was polymerized in an aqueous medium containing a polymerizable monomer and a hybrid resin, and an inorganic fine powder,
The hybrid resin contains at least a resin having a molecular structure in which a vinyl polymer unit and a polyester unit are chemically bonded,
The toner, wherein the hybrid resin has peaks at 4.6 ppm to 4.9 ppm and 5.0 ppm to 5.2 ppm in ¹ H-NMR measurement using a deuterated chloroform solvent.

The toner according to claim 1, wherein the polyester unit content in the hybrid resin is 55% by mass or more and 95% by mass or less.

The toner according to claim 1, wherein a ratio of the hybrid resin in the hybrid resin mixture is 1.0% by mass or more and 15.0% by mass or less.

The toner according to any one of claims 1 to 3, wherein the acid value of the hybrid resin is 3.0 mgKOH / g or more and 25.0 mgKOH / g or less.

The toner particles, a sulfonic acid group, the toner according to any one of claims 1 to 4, characterized in that it contains a resin having a sulfonate group or a sulfonic acid ester group.

The double bond content in the hybrid resin when converted to 1 unit of one monomer molecule constituting the hybrid resin is 0.30 unit% or more and 3.50 unit% or less. The toner according to any one of 1 to 5.

When the viscosity of the toner particles at 100 ° C. is η100 (Pa · s) and the viscosity at 110 ° C. is η110 (Pa · s), the following formula:
AηT = { log (η110) −log (η100) } / (110-100)
The average viscosity change amount AηT represented by the formula (1) satisfies 0.000 ≧ AηT ≧ −0.064, and η100 is 10000 Pa · s or more and 50000 Pa · s or less, 7. The toner described in 1.