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Polyester resin and toner including same

一种聚酯树脂、调色剂的技术，应用在聚酯树脂以及包含所述聚酯树脂的调色剂领域，能够解决劣化聚酯树脂透明度、低活性等问题，达到低成本、高图像亮度、宽定影温度范围的效果

Active Publication Date: 2012-09-26
SK CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem with these catalysts is that they are not environmentally preferable because they are used in excess due to their low activity, thereby deteriorating the transparency of polyester resins, since they have their own coloring properties (for example, antimony-based catalysts exhibit grey)

Method used

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  • Polyester resin and toner including same
  • Polyester resin and toner including same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0070] Hereinafter, the present invention will be described in more detail with reference to the following Examples and Comparative Examples. These examples are used to illustrate the present invention in detail, not to limit the scope of the present invention. The performance evaluation methods used in the following Examples and Comparative Examples are as follows.

[0071] (1) Polymerization reaction product: When the polymerization reaction is carried out under the same polycondensation conditions, in the case where the reaction product cannot leave the reactor, that is, due to a rapid increase in viscosity, its gel, is defined as "poor"; In the case where the polymerization reaction time exceeded 300 minutes due to too slow polymerization reaction speed, it was defined as "unreacted", and in the case where the polymerization reaction was a normal reaction, it was defined as "good".

[0072] (2) Biomass content (%): Use a 600Mhz nuclear magnetic resonance (NMR) spectromete...

Embodiment 1-6 and comparative example 1-6

[0111] A. Preparation of polyester resin

[0112] To a 2l reactor equipped with a stirrer and a condenser, add reactants having the components and contents given in Table 1 below (ratio of acid component to alcohol component, G / A=1.2~1.5), and Add 100ppm (based on the total amount of polyester resin) of TiO 2 / SiO 2 Co-precipitates act as catalysts. Afterwards, the reactor was slowly heated to 250° C., and the by-product water was removed from the reactor while the esterification reaction was carried out.

[0113] After the water was completely discharged outside the reactor, the reactants were transferred to a polycondensation reactor equipped with a stirrer, a condenser, and a vacuum system. A heat stabilizer (trimethyl phosphate) was added, the reaction temperature was increased to 250°C, the reaction pressure was lowered to 50 mmHg for 30 minutes, then excess diol was vented while the reaction was run under low vacuum.

[0114] Thereafter, the reaction pressure was slo...

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PUM

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Abstract

Disclosed is a toner for use in an electronic photograph-duplicating process or in an electrostatic printing process, and a polyester resin included in the toner as a binder. The polyester resin comprises lactic acids (D or L-lactic acids) or lactides (D or L-lactides) which are derivative compounds thereof, and dianhydrohexitols which are bio-derived sugar derivatives.

Description

technical field [0001] The present invention relates to a polyester resin and a toner containing the polyester resin, and more particularly, the present invention relates to a toner for an electrophotographic process or for an xerographic printing process, and a binder contained in the toner. Compound polyester resin. Background technique [0002] Generally, the electrophotographic process or xerographic printing process includes the following steps: (1) forming an electrostatically charged image or conductive image (hereinafter referred to as an "electrostatic latent image") on the surface of an electrostatic recording material cartridge, such as an organic photoconductor (OPC) cartridge ); (2) electrostatically attaching charged toner to a cartridge to develop and visualize an electrostatic latent image formed on the surface of the cartridge; (3) transferring the developed toner image to a substrate such as paper or recording film On the recording medium: (4) The image tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/087G03G9/08
CPCC08G63/08G03G9/08775C08G63/60G03G9/08755G03G5/14791G03G9/087G03G9/08795
Inventor 刘荣万李啓允李太雄辛钟昱
Owner SK CHEM CO LTD
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