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Continuous environment-friendly preparation process of methyl phenyl silicone resin for high-temperature-resistant paint

A technology of methyl phenyl silicon and high temperature resistant coating, applied in the direction of coating, etc., can solve the problems of high production energy consumption, poor mass transfer and heat transfer effect, low production efficiency, etc.

Active Publication Date: 2015-12-02
TANGSHAN SANYOU SILICON IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The harm of silicone resin waste water is mentioned in CN101602559B, and the treatment method mentioned in it is comparatively complicated, and it is difficult to realize industrialization
CN103694477A uses alkoxysilane as a raw material to prepare methylphenyl silicone resin, which uses membrane separation and rectification to separate acid medium oil, dilute acid and alcohol, which requires large equipment investment and high energy consumption
In the existing process, due to the high viscosity of the material, the poor mass and heat transfer effect, the average reaction time of the polycondensation process is 4 to 10 hours, and the polycondensation reaction time is too long, resulting in low production efficiency and high energy consumption, so the development is more suitable for polycondensation The reaction device of the link is of great significance

Method used

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  • Continuous environment-friendly preparation process of methyl phenyl silicone resin for high-temperature-resistant paint

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A continuous environment-friendly preparation process of methylphenyl silicone resin for high-temperature-resistant coatings is carried out as follows:

[0034] Feed according to the following raw material ratio:

[0035] Phenyltrichlorosilane: 42kg / h; Diphenyldichlorosilane: 8kg / h

[0036] Methyltrichlorosilane: 10kg / h; Dimethyldichlorosilane: 17kg / h

[0037] Xylene: 160kg / h; dilute acid water: 240kg / h

[0038] a. Hydrolysis

[0039] The chlorosilane monomer and xylene are fed into the static mixer according to the above ratio, and after preliminary mixing in the static mixer 11, enter the tubular hydrolysis reactor 12 to react with dilute acid water. The dilute acid water is dilute hydrochloric acid with a mass concentration of 0.9% (the washing water after the first level of water washing in the washing process of the material in the previous kettle can also be used). The hydrolysis temperature is controlled by the hydrolysis cooler 15 to be 30° C., and the react...

Embodiment 2

[0053] A continuous environment-friendly preparation process of methylphenyl silicone resin for high-temperature-resistant coatings is carried out as follows:

[0054] Feed according to the following raw material ratio:

[0055] Phenyltrichlorosilane: 50kg / h; Diphenyldichlorosilane: 6kg / h

[0056] Methyltrichlorosilane: 4kg / h; Dimethyldichlorosilane: 17kg / h

[0057] Xylene: 160kg / h; dilute acid water: 320kg / h

[0058] a. Hydrolysis

[0059] The raw materials are fed into the static mixer according to the above-mentioned ratio, and after preliminary mixing in the static mixer 11, they enter the tubular hydrolysis reactor 12 to react with dilute acid water. The dilute acid water is dilute hydrochloric acid with a mass concentration of 0.8% (the washing water after the primary water washing in the washing process of the last kettle material can also be used). The hydrolysis temperature is controlled by the hydrolysis cooler 15 to be 20° C., and the reaction gauge pressure in ...

Embodiment 3

[0073] A continuous environment-friendly preparation process of methylphenyl silicone resin for high-temperature-resistant coatings is carried out as follows:

[0074] Feed according to the following raw material ratio:

[0075] Phenyltrichlorosilane: 57kg / h; Diphenyldichlorosilane: 6kg / h

[0076] Methyltrichlorosilane: 4kg / h; Dimethyldichlorosilane: 20kg / h

[0077] Xylene: 160kg / h; dilute acid water: 240kg / h

[0078] a. Hydrolysis

[0079] The raw materials are fed into the static mixer according to the above-mentioned ratio, and after preliminary mixing in the static mixer 11, they enter the tubular hydrolysis reactor 12 to react with dilute acid water. Dilute acid water is dilute hydrochloric acid with a mass concentration of 0.5% (the washing water after the first level of water washing in the process of washing the materials in the previous kettle can also be used). The hydrolysis temperature is controlled by the hydrolysis cooler 15 to be 40° C., and the reaction gau...

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Abstract

The invention relates to a continuous environment-friendly preparation process of methyl phenyl silicone resin for high-temperature-resistant paint. The technical scheme includes: mixing according to a mass ratio of 1-20:1-10:1-10:1-20, and entering a tubular hydrolyzer to react with diluted acid water, wherein mass of benzene solvent is 1-3 times that of mixed chlorosilane monomer, and mass of the diluted acid water is 2-5 times that of the mixed chlorosilane monomer; stepwise washing hydrolysate at three or more stages to be neutral; continuously concentrating in vacuum, and allowing polycondensation when materials in a concentration polycondensation kettle reach 50-60% of volume of the kettle; after polycondensation is completed, detecting, filtering, packaging and recycling the solvent. The process has the advantages that no wastewater is discharged, the problem that conventional processes are large in discharging quantity, high in organic matter content and difficult in wastewater treatment is solved, product yield is increased, and devolatiligation time is reduced by feeding inert gas in the process of polycondensation.

Description

technical field [0001] The invention relates to a method for synthesizing methylphenyl silicone resin, in particular to a continuous and environment-friendly preparation process of methylphenyl silicone resin for high-temperature-resistant coatings. Background technique [0002] Because silicone resin has the characteristics of heat resistance, cold resistance, moisture resistance and weather resistance, it plays an important role in the special coating industry. There are many varieties of silicone coatings, which can be roughly divided into heat-resistant and weather-resistant anti-corrosion coatings, scratch-resistant transparent coatings, mold release and moisture-proof coatings, and radiation-resistant coatings. Methylphenyl silicone resin for high-temperature-resistant coatings can be used for a long time above 200 ° C, the color and gloss of the coating film change little, and the coating film is complete without cracking. Silicone coatings can be used at temperature...

Claims

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Application Information

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IPC IPC(8): C08G77/06C09D183/04
Inventor 孙长江任海涛周健闫超刘秋艳王春英李献起曹鹤
Owner TANGSHAN SANYOU SILICON IND
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