Binder resin for toner and toner

A technology of binder resin and toner, which can be used in developers, instruments, electrographics, etc., and can solve the problems of deterioration of developability, pollution, deterioration of blocking resistance, etc.

Inactive Publication Date: 2004-01-14
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, while the ink contamination is improved, the blocking resistance is deteriorated, or the developability is deteriorated
It has also been found that, in the case of polyester resin, even if the above-mentioned release agent is used, the effect is small, and once the amount is increased, the deterioration of the developer will be accelerated.
[0007] In summary, in order to provide a developer having sufficient fixability, ink stain resistance, and capable of forming high-quality copied images, it is necessary to impart sufficient electrophotographic characteristics to the above-mentioned developer. However, until now, in order to obtain high-quality 1. Although various methods have been tried for high-definition photocopied images, it is not yet possible to obtain a means that can fully overcome the above-mentioned shortcomings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0067] The invention is explained in more detail below with the aid of examples, but the invention is not in any way restricted by these examples. Wherein the "parts" in the following descriptions refer to parts by weight unless otherwise specified.

[0068] In the present invention, the molecular weight and molecular weight distribution of the binder resin for toner are measured by GPC. The commercially available monodisperse standard polystyrene is used as the standard in the determination, carried out under the following conditions:

[0069] Detector: SHODEX RI-71S

[0070] Solvent: THF

[0071] Chromatographic column: KF-G+KF-807L×3+KF800D

[0072] Flow rate: 1.0ml / min

[0073] Sample: 0.25% THF solution

[0074] The reliability of the measurement can be confirmed by using the Mw / Mn of the NBS706 polystyrene sample (Mw=288,000, Mn=137,000, Mw / Mn=2.11) reaching 2.11±0.10 under the above conditions.

[0075] The glass transition temperature (Tg) in the present inventio...

manufacture example

[0095]The production of the block copolymer resin of the present invention is carried out by the following method.

[0096] The production of resin C-1 will be described in detail as an example. About C-2~C-12. It produced similarly to resin C-1 except having changed the resin unit and monomer to the content shown in Table 1. The resin analysis results are also shown in Table 1 together with C-1.

[0097] In an autoclave replaced by an inert gas, add 100 parts by mass of heptane, 0.2 parts by mass of vinyl chloride and 0.5 parts by mass of triethylaluminum, and make ethylene and Propylene (weight ratio 1:1) was copolymerized for 2 hours. After the polymerization solution was filtered and washed, it was suspended in 100 parts by mass of heptane. 0.5 parts by mass of peroxide and 5 parts by mass of styrene were added, and polymerization was carried out at 43° C. for 10 hours. The obtained resin solution was filtered, washed, and the solvent was removed to obtain a block cop...

manufacture example

[0102] A reflux condenser, a water separator, a nitrogen inlet pipe, a thermometer and a stirring device are installed on a 5-liter four-necked flask, and the sheet-shaped reclaimed PET (weight average Molecular weight 75000), 22 mol% Actocol KB300 (manufactured by Mitsui Takeda Chemical Co., Ltd., bisphenol A derivative), 20 mol% triethylene glycol, 8 mol% trimethylolpropane, and 36 mol% terephthalic acid ( The total amount of the above four kinds of polyols (100 mol% is calculated based on 100 mol%) and dibutyltin oxide as a catalyst which is 0.5% by mass relative to the total amount of the above-mentioned reaction raw materials, while nitrogen gas is introduced into the flask, it is heated at 240° C. depolymerization and dehydration polycondensation. After completion of the reaction, the reaction product was discharged from the flask, cooled, and pulverized to obtain resin A-1. In addition, the reaction endpoint is determined using the acid value of the commonly used sampl...

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Abstract

The present invention relates to a binder resin for toners for developing electrostatically charged images, such as electrophotography, xerography, and the like, and a toner for electrophotography containing the binder resin. Provided are a binder resin for toner excellent in low-temperature fixability, ink contamination resistance, and development durability, and an electrophotographic toner for electrostatic development containing the binder resin for toner. The binder resin for toner of the present invention and the toner using the same are excellent in low-temperature fixability, ink contamination resistance, and development durability. The toner binder resin is characterized in that it contains a polyester resin (A), a block composed of a chain of structural units derived from vinyl hydrocarbons and / or conjugated diene hydrocarbons, and styrene derived A block copolymer composed of blocks composed of chains of structural units, and / or a hydrogenated block copolymer (B) which is itself a hydrogenated product of the above-mentioned block copolymer.

Description

technical field [0001] The present invention relates to a binder resin for toner for developing electrostatically charged images in electrophotography, xerographic copying, etc., and a toner for electrophotography containing the binder resin. Furthermore, the present invention relates to a binder resin for toner containing a polyester resin and toner. Background technique [0002] With the development of office automation, the demand for copiers and printers using electrophotography has increased dramatically, and the performance requirements have also been increased. Generally speaking, the electrophotography method in copiers and printers forms an electrostatic latent image on a photoreceptor, then develops the latent image with toner, transfers the toner image to a fixed film such as paper, and then uses a heat press to print the latent image. Roll heat and pressure fixing method (hot pressure roller fixing method) is carried out. In this heat roller fixing method, in o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/087C08L53/00C08L67/00C08L75/06
CPCG03G9/08708G03G9/08704C08L53/00C08L67/00G03G9/08755G03G9/08764C08L75/06G03G9/08788G03G9/087
Inventor 宇於崎浩隆武井宏之
Owner MITSUI CHEM INC
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