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Quickly discharging method for preparing resin

A resin and fast technology, which is applied in the field of rapid discharge of high-performance resins, can solve the problems of poor processing effect, difficulty, and large energy consumption, and achieve the effects of improving the workshop environment, short processing time, and saving energy

Inactive Publication Date: 2012-12-05
KINGFA SCI & TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the existing resin post-treatment process has the disadvantages of large energy consumption and poor treatment effect. In addition, how to control the process conditions of adding precipitating agent can not only achieve fast discharge, controllable particle size, but also improve the cooking effect. more difficult

Method used

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  • Quickly discharging method for preparing resin
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 (about 15% solid content)

[0026] Polymerization process:

[0027] In a four-port reaction kettle equipped with a thermometer, a nitrogen pipe, a condensing separator, and an anchor stirrer, first add 50Kg of refined sulfolane, and then add 6.67Kg of 4,4'-difluorobenzophenone and 3.303Kg of p-benzene Diphenol, when it is completely dissolved and the temperature rises to 80°C, add 3.498Kg (over 2%) Na 2 CO 3 , and then add 2Kg of xylene, stir and heat until the temperature rises to 150°C, the system starts to azeotrope, xylene and water condense in the water separator, the upper layer of xylene is refluxed, and the lower layer of water is continuously released, and the water is recovered to the theoretical When measuring, the xylene in the upper layer starts to be clear and transparent, and then continues to reflux for 20 minutes, and then starts to distill the xylene from the system. Continue to increase the viscosity. After 1.5 hours, stop the reactio...

Embodiment 2

[0031] Embodiment 2 (about 26% of solid content)

[0032] Polymerization process:

[0033] In a four-port reaction kettle equipped with a thermometer, a nitrogen pipe, a condensing separator, and a paddle stirrer, first add 25Kg of refined sulfolane, and then add 6.67Kg of 4,4'-difluorobenzophenone and 3.303Kg of p-benzene Diphenol (available polymer 8.64Kg, solid content is about 30%), when it is completely dissolved and the temperature rises to 80°C, add 3.498Kg (excess 2%) Na 2 CO 3 , then continue to heat up, add 2Kg of xylene, stir and heat, until the temperature rises to 150 ° C, the system starts to azeotrope, xylene and water condense in the water separator, the upper layer of xylene is refluxed, and the lower layer of water is continuously released. When the water is recovered to the theoretical amount, the xylene in the upper layer becomes clear and transparent, and the reflux continues for 20 minutes, and then the xylene starts to be evaporated from the system. The...

Embodiment 3

[0037] Example 3 (about 15% solid content) Polymerization process:

[0038] In a four-port reaction kettle equipped with a thermometer, a nitrogen pipe, a condensing water separator, and a propeller stirrer, first add 50Kg of refined sulfolane, then add 6.67Kg of 4,4'-difluorobenzophenone and 3.303Kg Hydroquinone (available polymer 8.64Kg, solid content about 15%), when it is completely dissolved and the temperature rises to 80°C, add 3.498Kg (excess 2%) Na 2 CO 3 , then continue to heat up, add 2Kg of xylene, stir and heat, until the temperature rises to 150 ° C, the system starts to azeotrope, xylene and water condense in the water separator, the upper layer of xylene is refluxed, and the lower layer of water is continuously released. When the water is recovered to the theoretical amount, the xylene in the upper layer becomes clear and transparent, and the reflux continues for 20 minutes, and then the xylene starts to be evaporated from the system. Viscosity increases cons...

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Abstract

The invention provides a quickly discharging method for preparing resin. The method comprises the following steps of: (1) after polymerization is finished, directly adding a poor solvent A dropwise into a high-temperature solution, and separating out polymer in a precipitate from a reaction system to obtain polymer colloidal fluid, wherein the solvent dripping speed is 10 to 500 ml / min and the stirring speed in the process is increased, so that the polymer colloidal fluid is dispersed uniformly; (2) continuously stirring, adding a certain amount of poor solvent B into the mixture, or adding the poor solvent A into the mixture, so that a polymerization product system and the poor solvent form a uniformly dispersed suspension mixture; (3) performing solid-liquid separation on the suspensionto obtain a crude product of the required polymer powder; and (4) refining and drying the crude product. The discharging method has the advantages of discharging quickly, avoiding the change of resinviscosity in the discharging process, obtaining the polymer powder with uniform size through process control, solving the problem that materials are adhered to the wall of a reaction kettle and improving production efficiency.

Description

technical field [0001] The invention relates to a rapid discharging method for preparing resin, in particular to a rapid discharging method for preparing high-performance resin. Background technique [0002] Many resins such as polyaryletherketone resin have the advantages of high temperature resistance, high strength, radiation resistance, etc., so they are widely used in automobiles, equipment and other fields, but the polymerization reaction temperature of the resin is often above 300 ° C, and high temperature solvents such as di Phenylsulfone, etc., other solvents are unable to adapt. No matter what kind of solvent is used for synthesis, after the polycondensation reaction, the reaction product needs to be washed and separated to remove the reaction solvent, inorganic salts, residual monomers and other compounds. Among them, the most difficult to wash off are alkali metal halides and alkaline earth metal halides. The high content of residual by-products or solvents in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/46C08G65/40C08G65/38C08G75/20
Inventor 饶先花曹民代惊奇苏成晓赵东辉曾祥斌刘奇祥蔡彤旻
Owner KINGFA SCI & TECH CO LTD
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