Toner and preparation method thereof

A technology of toner and crosslinking agent, which is applied in the field of toner and its preparation, and can solve problems such as undiscovered toner

Active Publication Date: 2019-11-15
HUBEI DINGLONG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, no toner that can better meet the above requirements has been found

Method used

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  • Toner and preparation method thereof
  • Toner and preparation method thereof
  • Toner and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] This embodiment provides a toner, and its preparation method specifically includes the following steps:

[0061] (1) Synthesis of unsaturated crystalline polyester resin A1

[0062] In a four-neck flask connected with a nitrogen introduction tube, a condenser, a dehydration tube and a stirrer, add 195 parts of dimethyl terephthalic acid in parts by mass and stir at 150°C for 1 hour, then add 85 parts of maleic glycol . Afterwards, raise the temperature to 200°C and continue the reaction for 5 hours, judge the loss of maleic glycol by analyzing the theoretical reaction water content of the distillate, add diethylene glycol for compensation, and continue the reaction for 3 hours to obtain an unsaturated crystalline polyester resin A1. The melting point Tm of the unsaturated crystalline polyester resin A1 was 60.7°C, the weight average molecular weight Mw was 15500, and the acid value of the unsaturated crystalline polyester resin was 20.5 mg KOH / g.

[0063] (1-2) Synth...

Embodiment 2

[0083] This example provides a toner, the preparation method of which is different from Example 1 only in that 20 parts of unsaturated crystalline polyester resin B2 modified by a triazine crosslinking agent is replaced by 8.9 parts of triazine in step (4) Unsaturated crystalline polyester resin B2 modified by similar cross-linking agent to obtain toner matrix M2 and finally toner T2.

Embodiment 3

[0085] This example provides a toner, the preparation method of which is different from Example 1 only in that in step (4), 20 parts of unsaturated crystalline polyester resin B2 modified by a triazine crosslinking agent is replaced by 34.3 parts of triazine Unsaturated crystalline polyester resin B2 modified by a similar cross-linking agent to obtain toner matrix M3 and finally toner T3.

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Abstract

The invention provides a toner and a preparation method thereof. The method comprises steps that (1), triazine crosslinking agent is made to react with unsaturated crystalline polyester resin A to obtain modified unsaturated crystalline polyester resin B, wherein, a weight-average molecular weight of the unsaturated crystalline polyester resin A is 3,000-30,000, and an acid value is 10-30mg / KOH / g.(2), the unsaturated crystalline polyester resin B modified in (1) is dispersed in styrene-acrylic resin monomer to obtain monomer mixture; (3), the monomer mixture in (2) is added to aqueous colloidto obtain suspension, and toner matrix is obtained through polymerization; and (4), the toner matrix in (3) is subjected to external mixing to obtain the toner. The method is advantaged in that through integrating excellent characteristics of the triazine crosslinking agent, the unsaturated crystalline polyester resin and the styrene-acrylic resin, the obtained toner has relatively wide fixing temperature scope and high flexibility.

Description

technical field [0001] The invention relates to the technical field of electrophotographic supplies, and more specifically, to a toner and a preparation method thereof. Background technique [0002] Toner is a key consumable for laser printing and digital copying, mainly composed of resin, pigment, additives, etc. In recent years, printers and copiers are increasingly required to increase their speed, energy saving, and miniaturization, and it is necessary to further improve the low-temperature fixability of toners. Toners using styrene-acrylic resins as binder resins have great limitations in terms of energy saving and high-gloss texture in image formation, especially in low-temperature fixing. The unique high melting ability and The high viscoelasticity of amorphous polyester can obtain low-temperature fixing ability. Due to the special molecular bond structure, the unsaturated crystalline polyester resin has a short melting range from crystalline state to molten state, r...

Claims

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Application Information

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IPC IPC(8): G03G9/08
CPCG03G9/0802
Inventor 李清涛肖桂林车丽媛朱顺全
Owner HUBEI DINGLONG CO LTD
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