Method for preparing polyacrylate rubber through continuous solution polymerization and devolatilization extrusion

A technology of acrylates and acrylates, which is applied in the field of continuous solution polymerization devolatilization extrusion to prepare acrylate rubber, which can solve the problems of difficult solvent removal, high polymerization reaction pressure, complex synthesis process, etc., and achieves stable polymerization process and easy The effect of control and low investment cost

Active Publication Date: 2012-06-20
CHANGCHUN UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of complex synthetic process, high polymerization reaction pressure and difficult solvent removal in the later stage of

Method used

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  • Method for preparing polyacrylate rubber through continuous solution polymerization and devolatilization extrusion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Mix 10 parts of methyl acrylate, 38.5 parts of butyl acrylate, 1.5 parts of glycidyl methacrylate, 50 parts of toluene and 0.1 part of benzoyl peroxide to form a mixed solution, and replace the air in the reactor with nitrogen , continuously add the mixed solution into the polymerization reactor through the feeding pump, start stirring at a speed of 140 rpm, heat the temperature with an oil bath, keep the temperature of the oil bath at 110°C, and react for 2 hours to obtain a polymerization product, start the feeding pump , start the discharge melt pump and the devolatilization twin-screw extruder at the same time, according to the constant flow rate of the material is 25g / min, adjust the feed rate and discharge rate, make the feed rate and discharge rate consistent, the pressure in the polymerization tank is 2.4 atmospheric pressure; set the temperature of each section of the devolatilization extruder to 150°C for the first and second sections, 160°C for the third and f...

Embodiment 2

[0027] Mix 14 parts of methyl acrylate, 53.9 parts of butyl acrylate, 2.1 parts of glycidyl methacrylate, 30 parts of toluene and 0.07 parts of benzoyl peroxide to form a mixed solution, and replace the air in the reactor with nitrogen , continuously add the mixed solution into the polymerization reactor through the feed pump, start stirring at a speed of 140 rpm, heat the temperature with an oil bath, keep the temperature of the oil bath at 130°C, and react for 2.5 hours to obtain a polymerization product, start the feed pump , start the discharge melt pump and the devolatilization twin-screw extruder at the same time, according to the constant flow rate of the material is 30g / min, adjust the feed rate and discharge rate, so that the feed rate and discharge rate are consistent, the pressure in the polymerization tank is 2.6 atmospheric pressure; set the temperature of each section of the devolatilization extruder to 150°C for the first and second sections, 160°C for the third ...

Embodiment 3

[0029]Mix 16 parts of methyl acrylate, 61.6 parts of butyl acrylate, 2.4 parts of glycidyl methacrylate, 20 parts of toluene and 0.04 parts of benzoyl peroxide to form a mixed solution, and replace the air in the reactor with nitrogen , continuously add the mixed solution into the polymerization reactor through the feeding pump, start stirring at a speed of 140 rpm, and use an oil bath to heat up the temperature. After the oil bath temperature is kept at 150°C, react for 2 hours to obtain a polymerization product, and start the feeding pump , start the discharge melt pump and the devolatilization twin-screw extruder at the same time, adjust the feed rate and discharge rate according to the constant flow rate of the material, so that the feed rate and discharge rate are kept consistent, and the pressure in the polymerization tank is 2.8 atmospheric pressure; set the temperature of each section of the devolatilization extruder to 150°C for the first and second sections, 160°C for...

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Abstract

The invention discloses a method for preparing acrylate rubber through continuous solution polymerization and devolatilization extrusion, belonging to synthetic technique of polyacrylate rubber and solving the problems in conventional preparation methods of polyacrylate rubber that the pressure during the polymerization process is high and that the solvent of the polymerisates cnnot be easily got rid of in later period. According to the method disclosed by the invention, acrylate monomer and a small amount of monomer with crosslinking active groups are taken as the raw materials to prepare polyacrylate rubber through the methods of continous solution polymerization and devolatilization extrusion in a solvent under the action of initiator. The acrylate monomer is one or the mixture of methyl acrylate, ethyl acrylate or butyl acrylate; the monomer with crosslinking active groups is epoxypropyl methacrylate; the initiator is benzoyl peroxide or di-t-butyl peroxide; and the solvent is toluene or ethyl acetate. The content of the residual volatile in the acrylate rubber prepared through the method disclosed by the invention is lower than 1% of the content of acrylate rubber.

Description

technical field [0001] The invention belongs to the synthesis technology of acrylate rubber, in particular to a method for preparing acrylate rubber through continuous solution polymerization, devolatilization and extrusion. Background technique [0002] Acrylate rubber is a special rubber obtained by copolymerization of acrylate as the main monomer. Its main chain is a saturated carbon chain and its side groups are polar ester groups. Due to its special structure endowing it with many excellent features, it is widely used in various high temperature and oil-resistant environments, and has become a sealing material that the automobile industry has focused on developing and promoting in recent years. [0003] The most important preparation methods of acrylate rubber are emulsion polymerization and solution polymerization, both of which have achieved industrial production. [0004] The representative company that produces acrylate rubber by emulsion polymerization is Zeon Cor...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F220/14C08F220/32C08F2/06C08F6/12C08F6/10B29C47/92B29C48/92
Inventor 孙树林谭志勇张会轩
Owner CHANGCHUN UNIV OF TECH
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