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Binder resin for toner and toner

A technology of binder resin and toner, which is applied in the field of binder resin and toner for toner, and can solve problems that have not yet been obtained

Inactive Publication Date: 2008-03-19
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to provide a toner capable of forming a higher-quality copied image, it is necessary to impart sufficient electrophotographic characteristics to the above-mentioned toner, and various methods have been tried so far to achieve high-quality and high-definition copied images. , but there is no method that can fully solve the above problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0159] 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, "parts" in the following descriptions refer to parts by mass unless otherwise specified.

[0160] The molecular weight and molecular weight distribution of the binder resin for toner in the present invention are determined by GPC measurement. The commercially available monodisperse standard polystyrene was used as the standard in the determination, and carried out under the following conditions:

[0161] Detector: SHODEX RI-71S

[0162] Solvent: THF

[0163] Chromatographic column: KF-G+KF-807Lx3+KF800D

[0164] Flow rate: 1.0ml / min

[0165] Sample: 0.25% THF solution

[0166] 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.

[0167] The glass transition temperature (Tg) in the pre...

manufacture example

[0197] Table 2 Production Example of Polyester Resin

[0198] resin

β-1

β-2

β-3

β-4

β-5

β-6

β-7

β-8

β-9

β-10

β-11

PET(mol%)

67

67

34

30

70

68

69

68

34

PBT(mol%)

- - - 67

33

- - - - - 33

KB300(mol%)

28

18

94

28

28

70

30

28

26

30

28

Diethylene glycol (mol%)

- - - - - - - - - - - Triethylene glycol (mol%)

- - - - - - - - - - - Trihydroxypropane (mol%)

5

15

6

5

5

- - 4

5

2

5

Terephthalic acid (mol%)

33

31

33

33

68

35

37

37

34

33

Isophthalic acid (mol1%)

- - 103

- - - - ...

Embodiment 8～15

[0206] Example 8 will be described below. Examples 9-15 were implemented similarly to Example 8 except the conditions described in Table 4. The evaluation results are also shown in Table 4.

[0207] 30 parts by mass of resin α-7, 70 parts by mass of resin β-10, 3.0 parts by mass of polypropylene wax (Hiwax NP105; manufactured by Mitsui Chemicals) and 2.1 parts by mass of tolylene diisocyanate (based on Resin 13 was obtained after performing a kneading reaction in a twin-screw extruder based on the total number of moles of structural units derived from polyols in resin α-7. Tg of the obtained resin was 58.1° C., Mw (weight average molecular weight) / Mn (number average molecular weight) of GPC was 21.4, and the peak molecular weight was 6,000. Furthermore, the THF-insoluble content was 7% by mass.

[0208] With 100 parts by mass of resin 7, 6 parts by mass of carbon black (MA-100, manufactured by Mitsui Chemicals) and 1.5 parts by mass of an electrostatic regulator (BONTRON E-...

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Abstract

A binder resin for a toner comprises a polyester component having a specific structure which is not soluble in tetrahydrofuran, and a polyester component having a specific branched structure which is soluble in tetrahydrofuran. The binder resin can provide a toner, which is superior in low-temperature fixation and offset resistance and can be used in high speed printing in response to the recent market demands owing to its specific structure.

Description

technical field [0001] The present invention relates to a binder resin for toner and toner. More specifically, the present invention relates to a binder resin for toner containing a specific polyester resin, and toner. It also relates to a binder resin for a toner used in electrophotography and a 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 is to form an electrostatic latent image on a photoreceptor, then develop the latent image with toner, and then transfer the image to a fixed film such as paper, and then heat and fix it with a hot pressing roller (thermal pressure roller fixing method). In this heat roller fixing method, in order to reduce power consumption, improve economy, increase copying speed and prevent paper curling, etc., it is nec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G9/087C08G18/42C08G63/20
CPCC08G63/20G03G9/08755Y10S430/104C08G18/4202G03G9/087
Inventor 寺内知哉宇於崎浩隆松岡洋史江村祐二武井宏之桥本浩伸
Owner MITSUI CHEM INC