Additive for toner and preparation method thereof

A technology for additives and toners, applied in the field of toners, can solve the problems of poor thermal stability, poor resin compatibility, thermal transfer image shift, etc., and achieves good compatibility, simple preparation method, and stable increase in charge amount. sexual effect

Active Publication Date: 2021-03-30
HUBEI DINGLONG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As people put forward higher requirements for high-speed printers and copiers, low-temperature fixing, etc., the above-mentioned goals are generally achieved by further reducing the molecular weight of polyester resin or adding crystalline resin, while low-molecular-weight polyester resin or excessive addition of crystalline resin will cause It brings many problems such as poor thermal stability, thermal transfer image shift, and poor resin compatibility. Solving this problem is an important technical difficulty in preparing a new generation of polyester chemical toner

Method used

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  • Additive for toner and preparation method thereof
  • Additive for toner and preparation method thereof
  • Additive for toner and preparation method thereof

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preparation example Construction

[0025] Embodiments of the present invention also provide a method for preparing the above-mentioned additive for toner, which includes the following steps:

[0026] S1. Using a silane coupling agent to organically modify nano silicon dioxide to obtain organically modified nano silicon dioxide. Among them, the particle size of nano-silica is between 10-100nm, and the particle size of nano-silica is preferably between 20-50nm. If the particle size is too small, the modification effect is not significant, and the effect of additives cannot be achieved. , if the particle size is too large, the modified particles will be too large, which is not conducive to the preparation of toner particles; the silane coupling agent includes one or at least one of KH540, KH550, KH560, KH570, KH702, KH151, and KH106 A mixture of the two.

[0027] The specific method is: mix nano-silica, ethanol, water and silane coupling agent in a weight ratio of 1:20-60:5-15:0.4-0.8, and reflux in a water bath ...

Embodiment 1

[0044] This embodiment provides an additive for toner, which is prepared according to the following preparation process:

[0045] Add 20g of nanoscale silicon dioxide CY-SP10 (10nm particle size), 400g of ethanol and 100g of deionized water into the reactor equipped with condenser tube, thermometer and stirrer, add 0.8g of 3-(2 , 3-propylene oxide) propyltrimethoxysilane, refluxed in a water bath at 55°C for 8h, cooled to room temperature after the reaction stopped, and the product was centrifuged and washed to obtain organically modified nano-silica.

[0046] 8.3g, 0.05mol of isophthalic acid (dibasic acid), 8.3g, 0.05mol of terephthalic acid, 6g, 0.05mol of trimethylolethane (trihydric alcohol), 6.7g, 0.05mol Trimethylolpropane, 0.332g of tetrabutyl titanate cross-linking catalyst and 1.16g of xylene were mixed evenly, heated to 170°C for 3 hours, then heated to 225°C and added the above-mentioned organically modified nano-silica 16.6g, keep warm for 1h, and cool down to 35...

Embodiment 2

[0049] This embodiment provides an additive for toner, which is prepared according to the following preparation process:

[0050] Add 20g nano-silica CY-SP50 (50nm particle size), 400g ethanol and 100g deionized water into the reactor equipped with condenser tube, thermometer and stirrer, add 0.8g of 3-(2, 3-(propylene oxide) propyltrimethoxysilane was refluxed in a water bath at 55° C. for 8 hours, and after the reaction was stopped, it was cooled to room temperature, and the product was centrifuged and washed to obtain organically modified nano-silica.

[0051] 8.3g, 0.05mol of isophthalic acid (dibasic acid), 8.3g, 0.05mol of terephthalic acid, 6g, 0.05mol of trimethylolethane (trihydric alcohol), 6.7g, 0.05mol Trimethylolpropane, 0.332g of tetrabutyl titanate cross-linking catalyst and 1.16g of xylene were mixed uniformly, heated to 170°C and kept for 3 hours, then heated to 225°C and added the above-mentioned organically modified nano-silica 16.6 g, keep warm for 1h, and...

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Abstract

The invention provides an additive for a toner and a preparation method thereof and relates to the field of toners. The additive for the toner, provided by the embodiment of the invention, is a modified nano silicon dioxide compound of hyperbranched polyester; the additive for the toner is obtained by the specific steps of modifying nano silicon dioxide and grafting hyperbranched polyester resin on the surface of the nano silicon dioxide. The preparation method is simple, and the electrifying effect and the stability can be increased; adhesive emulsion provided by the embodiment of the invention is obtained by shearing and dispersing the polyester resin and the additive for the toner, and has good compatibility; the toner provided by the embodiment of the invention is prepared by coagulating the adhesive emulsion, a color agent dispersion solution and a release agent dispersion solution; the electrifying amount and the stability can be increased; the vitrification and rheological parameters are improved; the image quality and gloss of printed and copied images are improved and the effects of saving energy and reducing consumption are realized.

Description

technical field [0001] The invention relates to the field of toner, and in particular to an additive for toner and a preparation method thereof. Background technique [0002] 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. In the past, toners using styrene-acrylic resins as binder resins have been widely used, but they have great limitations in meeting the energy-saving and high-gloss texture of image formation, especially in low-temperature fixing. With the rapid development of binder resin toner, this toner has become the application trend of toner for new generation printers and copiers. At present, some toners containing polyester resin and their preparation methods have been disclosed, such as CN200710166710.1, US8715897, CN201010531001.0 and other patents. [0003] As people put forward higher requirements for h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G9/097G03G9/08
CPCG03G9/0804G03G9/097
Inventor 朱双全李清涛肖桂林
Owner HUBEI DINGLONG CO LTD
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