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A kind of optical grade pmma continuous bulk polymerization method and production system thereof

A bulk polymerization, optical-grade technology, which is applied in the field of optical-grade PMMA continuous bulk polymerization method and its production system, can solve the problems of easy production of a large amount of solvent and water, complex synthesis method, and need for recycling, so as to shorten the residence time and replace Product flexibility, polymer purity effects

Inactive Publication Date: 2019-02-05
CENTURY OPTICOMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a kind of optical grade PMMA continuous bulk polymerization method and production system thereof, for solving the complex, easy-to-produce synthetic method of polymethyl methacrylate in the prior art A large amount of solvent and water need to be recycled, and the additives remaining in the polymer also bring inconvenience to the later processing and utilization.

Method used

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  • A kind of optical grade pmma continuous bulk polymerization method and production system thereof
  • A kind of optical grade pmma continuous bulk polymerization method and production system thereof
  • A kind of optical grade pmma continuous bulk polymerization method and production system thereof

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Embodiment 1

[0038] A kind of production optical grade PMMA continuous mass polymerization method, comprises the steps: reaction component methyl methacrylate (being MMA), initiator, auxiliary agent are mixed into mixed solution by proportioning, the raw material of mixed solution comprises (by weight ): 100 parts of methyl methacrylate, 1 part of di-tert-butyl peroxide, and 1 part of dodecanethiol. When mixing, control the temperature below 87°C, put each raw material into a spray mixing tank and mix thoroughly, the mixed solution is introduced from the mixing tank into the storage tank for storage, and then through the metering device, the mixed solution is injected into the qualified product that has passed nitrogen replacement. Carry out polymerization reaction and extrude continuously in the uniaxial continuous polymerization reactor system, in the reaction process, the screw speed of uniaxial continuous polymerization reactor is 60rpm, and the pressure in the reaction chamber of uniax...

Embodiment 2

[0040]A kind of production optical grade PMMA continuous mass polymerization method, comprises the steps: reaction component methyl methacrylate (being MMA), initiator, auxiliary agent are mixed into mixed solution by proportioning, the raw material of mixed solution comprises (by weight ): 100 parts of methyl methacrylate, 1 / 2 part of di-tert-butyl peroxide, and 1 / 2 part of dodecanethiol. When mixing, control the temperature below 80°C, put each raw material into a spray mixing tank and mix thoroughly, the mixed solution is introduced from the mixing tank to the storage tank for storage, and then through the metering device, inject the mixed solution into the qualified product that has passed nitrogen replacement. Carry out polymerization reaction and extrude continuously in the uniaxial continuous polymerization reactor system, in the reaction process, the screw speed of uniaxial continuous polymerization reactor is 45rpm, and the pressure in the reaction chamber of uniaxial ...

Embodiment 3

[0042] A kind of production optical grade PMMA continuous mass polymerization method, comprises the steps: reaction component methyl methacrylate (being MMA), initiator, auxiliary agent are mixed into mixed solution by proportioning, the raw material of mixed solution comprises (by weight ): 100 parts of methyl methacrylate, 1 / 2 part of di-tert-butyl peroxide. When mixing, control the temperature below 85°C, put each raw material into a spray mixing tank and mix thoroughly, the mixed solution is introduced from the mixing tank to the storage tank for storage, and then through the metering device, inject the mixed solution into the qualified product that has passed nitrogen replacement. Carry out polymerization reaction and extrude continuously in the uniaxial continuous polymerization reactor system, in the reaction process, the screw speed of uniaxial continuous polymerization reactor is 50rpm, and the pressure in the reaction chamber of uniaxial continuous polymerization reac...

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Abstract

The invention provides an optical-grade PMMA (polymethyl methacrylate) continuous bulk polymerization method and production system. The method comprises the following steps: mixing reaction raw materials methyl methacrylate, initiator and assistant according to proportions to obtain mixed solution, performing metering, then injecting the mixed solution into a continuous polymerization reactor to perform polymerization reaction and continuous extrusion, and performing devolatilization treatment after extrusion to obtain a PMMA solid material. By dispersing and thinning the materials through screw-type shaft body rotation and shearing, the molecular weight of the materials is enabled to be reasonably distributed, the mixing uniformity of reaction components is improved, the reaction components are enabled to exchange heat with a machine barrel wall and a shaft outer wall in time, the entire process is continuous, the material retention time is reduced, the probability of heat accumulation is reduced, the temperature gradient between the materials is reduced, the problem of reaction heat control of bulk polymerization is solved and finally the continuous extrusion of the product in the reaction process is realized.

Description

technical field [0001] The invention relates to a polymer preparation method, in particular to an optical-grade PMMA continuous bulk polymerization method and a production system thereof. Background technique [0002] Polymethyl methacrylate is a homopolymer or copolymer of methyl methacrylate, referred to as PMMA, which is a transparent material with excellent comprehensive properties. It has excellent light transmission, apparent gloss, excellent weather resistance and good post-processing performance. Due to many reasons such as raw materials and technology, the quality and performance of existing PMMA products are not good, and the variety is single, which is difficult to meet the market demand. [0003] At present, the synthesis of methyl methacrylate in industry mainly includes suspension polymerization, solution polymerization, and emulsion polymerization. Among them, emulsion polymerization is more common, but the three methods of emulsion, suspension, and solution ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/12C08F120/14C08F2/01C08F2/02B29C48/92
CPCB29C48/92B29C2948/92514B29C2948/92704C08F2/01C08F2/02C08F120/14C08L33/12
Inventor 王亚辉王勇武
Owner CENTURY OPTICOMM CO LTD
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