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Method for preparing chlorinated rubber by water phase photocatalysis

A technology for chlorinated rubber and catalytic preparation, applied in the field of polymer chemical industry, can solve problems such as complicated operation, and achieve the effects of simple operation, good solubility and high efficiency

Inactive Publication Date: 2011-09-07
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods are more complex

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] In the reaction kettle, add 20kg of clean water (clean water as defined above), add 50g of nonylphenol polyoxyethyl ether, 100g of alkyl trimethyl ammonium chloride and 5kg of natural latex (Wenzhou Ya Fu Natural Latex Auxiliary Co., Ltd.), after fully emulsifying, add 5kg 20% ​​hydrochloric acid to acidify (make the pH value of the emulsion 2), and obtain the suspension material liquid. Then add 500g photocatalyst nano-titanium dioxide and 10g lauryl peroxide in the suspension material liquid, under stirring and ultraviolet light irradiation, logical chlorine gas at room temperature (the logical chlorine speed is controlled at 30m 3 / h·m 3 ) for chlorination reaction, after deep chlorination for 15 hours, deacidification, water washing, neutralization, centrifugation, and drying into a white powder product, the chlorine content can reach 68%.

Embodiment 2

[0010] Add 100kg of clean water to the reaction kettle, add 100g of nonylphenol polyoxyethyl ether, 200g of alkyltrimethylammonium chloride and 10kg of natural latex in sequence under stirring, and add 13kg of 20% hydrochloric acid after fully emulsifying Carry out acidification (make the pH value of the emulsion 2), obtain suspension material liquid. Then add 1kg photocatalyst nano-titanium dioxide and 20g lauryl peroxide in the suspension material liquid, under stirring and ultraviolet light irradiation, logical chlorine gas at room temperature (the logical chlorine speed is controlled at 40m 3 / h·m 3 ) for chlorination reaction, after deep chlorination for 18 hours, deacidification, water washing, neutralization, centrifugation, and drying into a white powder product, the chlorine content can reach 67%.

Embodiment 3

[0012] Add 500kg of clean water to the reaction kettle, add 1.5kg of nonylphenol polyoxyethyl ether, 3kg of alkyltrimethylammonium chloride and 100kg of natural latex in sequence under stirring, and after fully emulsified, add 80kg of 20% Acidify with hydrochloric acid (make the pH value of the emulsion 2) to obtain a suspension material. Then add 10kg photocatalyst nano-titanium dioxide and 400g potassium peroxosulfate in the suspension material liquid, under stirring and ultraviolet light irradiation, logical chlorine gas at room temperature (the logical chlorine speed is controlled at 40m 3 / h·m 3 ) for chlorination reaction, after deep chlorination for 20 hours, deacidification, water washing, neutralization, centrifugation, and drying into a white powder product, the chlorine content can reach 64%.

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PUM

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Abstract

The invention discloses a method for preparing chlorinated rubber by water phase photocatalysis, which comprises the following steps of: adding an emulsifier, a dispersing agent and natural latex into pure water in turn under stirring, regulating the pH value of turbid feed liquor to be 2 by using hydrochloric acid, adding a photocatalyst and a photocatalysis accelerator, introducing chlorine at room temperature for chlorination reaction under stirring and ultraviolet irradiation, and after the reaction is finished, deacidifying, washing, neutralizing, centrifuging and drying to obtain a finished white powder product. The content of the chlorine in the prepared chlorinated natural rubber is between 62 and 69 percent, and the product has high dissolubility; and the temperature is not required to be controlled strictly, the reaction can be finished in a single reaction kettle at room temperature, and the method is high in efficiency and easy to operate.

Description

technical field [0001] The invention relates to the field of polymer chemical industry, and relates to a method for preparing chlorinated rubber by photocatalysis using natural latex as a raw material in an aqueous phase. Background technique [0002] Chlorinated rubber is a rubber derivative product obtained from natural latex or natural rubber or synthetic rubber after chlorination modification, and is widely used in inks, coatings, adhesives and other fields. To produce chlorinated rubber by chlorination reaction by solvent method, because the cost of solvent is high and solvents such as carbon tetrachloride will cause harm to human body and environment, so it is very urgent to develop a method for producing chlorinated rubber by non-solvent method. [0003] At present, the research on the preparation of chlorinated rubber by aqueous phase method has made certain progress, and three relevant patents (CN1667000A, CN101260168A, CN101481429A) have been announced in China. s...

Claims

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Application Information

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IPC IPC(8): C08C19/14
Inventor 薛珲黄宝铨陈庆华刘欣萍许兢肖荔人钱庆荣曹长林
Owner FUJIAN NORMAL UNIV