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Master batch and toner therefrom

A technology of toner and masterbatch, applied in the direction of developer, instrument, optics, etc., can solve the problem of particle aggregation, and achieve the effect of high transferability and good fluidity

Inactive Publication Date: 2006-02-22
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This helps overcome problems such as particle aggregation

Method used

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  • Master batch and toner therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 7 and comparative example 1 to 5

[0117] With 80 parts of commercially available polyester resin for toner, 10 parts of crystalline polyester 1 and 10 parts of polyol 1 as binder resin, MB resulting in a CB content of 10%, charge control agent (1 part, S-34, Orient Chemical Industries, Ltd.), a release agent (1 part, PP wax) and synthetic ester wax (1 part; melting point: 105° C.; penetration value: 1), and a toner was prepared. These components are mixed, kneaded, and ground. The surface of the ground product is treated, thereby obtaining a toner.

[0118] MB Nos. 1 to 12 were observed under a transmission electron microscope (TEM). This observation indicates that except for MB No. 11, the dispersion state of MB is satisfactory.

[0119] Table 9 shows the evaluation results of the toners prepared in Examples and Comparative Examples.

[0120] toner

No.

MB No.

Crystalline PEs

No.

Polyol

No.

TEM Observation

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Melt and Migration Resis...

Embodiment 8 to 19 and comparative example 6 to 20

[0124]Toners were produced in the same manner as in Example 1, and the obtained toners were evaluated. The evaluation results of the toners produced in Examples and Comparative Examples are shown in Table 10. In Table 10, for example, "2 / 10 parts" in the "Crystalline PEs No." column means adding 10 parts of crystalline PEs No. 2 given in Table 7, and "1 / 10 parts" in the "Polyol No." column / 10 parts" means adding 10 parts of polyol No.1 given in Table 6, and "No.1 / 1 part" given in the "wax" column means adding 1 part of wax No.1 given in Table 8 .

[0125] toning

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Abstract

A master batch (MB) comprising at least a colorant and a polyester resin characterized in that the polyester resin has a glass transition temperature (Tg) and a softening point (Sp) satisfying the relationships of the formulae (1), (2): 4 Tg - 170 <= Sp <= 4 Tg - 110 (1) 90 <= Sp <= 120 (2) and a toner from the master batch. The toner obtained from the master batch comprising the base resin of high heat resistance and high dispersibility produces glossy images of sharp color, images of stable gloss exhibiting wide fixing temperature range and images free of gloss unevenness.

Description

technical field [0001] The present invention relates to a masterbatch (resin having strong coloring ability) and a toner using the masterbatch. Background technique [0002] The method heretofore widely used to blacken thermoplastic resins involves compounding powdered or granular carbon black into a powder, bead, or mixture of bead and powder of a resin or resin composition, and extruding the resulting mass in an extruder. Melt kneading, and extruding the kneaded product, followed by granulation. [0003] However, the method in which the carbon black powder is compounded into the resin or the resin composition in such a state has problems such as contamination of the work environment with fine particles, handling, generation of carbon black bubbles due to classification, aggregation, etc., in subsequent batches There is color residue, and color mixing. [0004] A method involving the use of a masterbatch (MB) prepared by compounding carbon black into the resin was employe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/22C08L63/00C08L67/00G03G9/08G03G9/087
CPCG03G9/08797C08J3/226C08J2467/00G03G9/08755
Inventor 松本香鹤藤田居一酒井正博村上登司彦丰田光启
Owner SHARP KK