Blend polymerizing preparing method for copolymer resin

A technology of copolymer resin and poly resin, applied in the field of blending and preparation of copolymer resin, can solve the problems of dwarfing, poor compatibility, difficulty in coordinating toner blackness, fixing and sticking rollers, etc., and achieves easy processing and high yield. High, moderately proportioned effect

Inactive Publication Date: 2009-05-20
张家港威迪森化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This resin was once all the rage because it also played the role of expanding the molecular weight distribution (GPC) of the toner copolymer resin. However, after a long period of use, it was found that the new product blended with the two "finished products" was less compatible and often difficult to coordinate. The blackness, fixation and offset of the toner meet the technical standards, especially when it is used for laser printing toner.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] The present invention will be further described below in conjunction with specific embodiments. However, the present invention should not be limited to these examples.

[0043] First example:

[0044] Preparation of prepolymer P-1:

[0045] 1. Put 250 parts of xylene into the reactor and start stirring and slowly heat up to boiling;

[0046] 2. Mix 80 parts of styrene, 20 parts of butyl acrylate, and 17 parts of di-tert-butyl peroxide (called monomer mixture) until uniform.

[0047] 3. Add the above-mentioned monomer mixture dropwise into the boiling xylene solvent at a constant speed for 5 hours, and keep it under reflux temperature for 4 hours after dropping.

[0048] 4. In the state of reflux, slowly apply negative pressure, flash under reduced pressure, gradually evaporate the xylene solvent, and the copolymer resin obtained from the reaction is a viscous liquid at 180-200 ° C.

[0049] 5. Release the vacuum, and release or press out the prepolymer from the reac...

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PUM

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Abstract

The present invention discloses the preparation process of resin copolymer as the main material for toner used in xerographic printer, facsimile apparatus and laser printer. Styrene and its derivative in 60-80 powder, acrylate in 20-40 weight portions, initiator in 15-25 weight portions and xylene solvent in 150-250 weight portions are mixed, reacted and further treated through eliminate solvent, crushing and sieving to obtain pre-polymer. The pre-polymer is dissolved into monomer mixture of styrene and acrylate, cross-linking agent and initiator are added, and through mixing, reaction, cooling, filtering, washing, dewatering, drying, crushing and sieving, resin copolymer is prepared. The resin copolymer has wide molecular weight dispersion, low thermal capacity, high machining performance and other advantages, and may be used in produced toner with excellent comprehensive performance.

Description

technical field [0001] The invention relates to a preparation method of a copolymer resin, which is the main raw material for manufacturing electrostatic copiers, facsimile machines, and laser printer toners. Background technique [0002] Copolymer resin is the main raw material for the production of electrostatic copiers, facsimile machines, and laser printers (commonly known as toner), and its weight ratio in toner accounts for 60-80%, so it is the main factor affecting the quality and cost of toner. Copolymer resins for toners have generally adopted two synthetic routes: [0003] One is that the monomer is dissolved in a solvent, a copolymerization reaction occurs in the solvent, and then the solvent is removed to obtain a copolymerized resin. This synthetic route is commonly called a solution method, and the obtained product is called a solution method resin. The limitation of the resin prepared by this method is that it is difficult to obtain "partially insoluble" copo...

Claims

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Application Information

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IPC IPC(8): C08F265/06C08F257/02C08K5/092C08K5/01G03G9/00
Inventor范葆荃钱建平付学敏叶斌江燕
Owner张家港威迪森化学有限公司