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Chlorinated polymethyl methacrylate-butadiene-styrene copolymer and gas-solid phase reaction preparation method thereof

A technology of chlorinated polymethyl methacrylate and styrene copolymer, which is applied in the field of polymer material preparation, can solve the problems of no data reports, no CMBS commodity circulation, etc., and achieve uniform distribution, improved saturation, and high quality stable effect

Inactive Publication Date: 2020-04-24
杭州新元化工技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no CMBS product circulating in the market, and no related information reports have been seen.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of method adopting rotary reactor gas-solid phase reaction to prepare CMBS, comprises the following steps:

[0031] (1) choose volatile matter 0.18wt%; The MBS powder of average particle diameter 152 μ m, cross 30 mesh sieves, get 50.0Kg, place in 250L rotary reactor (rotary reactor is made up of drum, support, vacuum ventilation system and The sealing system consists of a baffle in the drum of the rotary reactor, the material of the inner wall of the drum and the baffle is steel-lined fluoroplastic, and a jacket is provided outside the rotary reactor), and 0.6Kg of hydrophobic white carbon is added.

[0032](2) Start the drum of the rotary reactor, adjust the rotating speed to be 15 rpm, vacuumize the drum of the rotary reactor to a pressure of -0.08MPa, and fill the reactor with nitrogen at 50°C to increase the pressure To 0.2MPa, after the pressure is released, repeat vacuuming, nitrogen filling, and pressure relief operation 4 times. Add 200g of azobisisohep...

Embodiment 2

[0041] A method for preparing CMBS by tank reactor, adopting tank reactor gas-solid phase reaction to prepare CMBS, comprises the following steps:

[0042] (1) Choose 0.5wt% volatile matter; MBS powder with an average particle size of 148 μm, pass through a 40 mesh sieve, get 125Kg, add 1Kg of precipitation method hydrophobic white carbon black, and place in a 500L tank reactor with stirring.

[0043] (2) Start the stirring of the tank reactor, adjust the speed to 20 rpm, evacuate the reactor to a pressure of -0.08MPa, fill the reactor with nitrogen at 60°C to raise the pressure to 0.2MPa, and continue to rotate Let off the pressure for 5 minutes. Repeat the above operation 3 times. Add 0.5Kg of azobisisobutyronitrile, evacuate to -0.08Mpa, slowly feed chlorine gas into the reactor, control the pressure rise rate of 0.08Mpa / 10 minutes, feed cooling water into the reactor jacket, and control the reaction temperature < 90°C. When the pressure rises to 0.2MPa, the ventilation ...

Embodiment 3

[0047] A kind of method that rotary reactor prepares CMBS, adopts rotary reactor gas-solid phase reaction to prepare CMBS resin powder, comprises the following steps:

[0048] (1) Choose 0.3wt% volatile matter, MBS powder (butadiene rubber content 60%) with an average particle size of 160 μm, pass through a 30-mesh sieve, get 150Kg, add 2Kg of highly transparent white carbon black and place it in a 500L steel-lined fluoroplastic rotation In the reactor (the rotary reactor is composed of a drum, a bracket, a vacuum ventilation system and a sealing system, the drum of the rotary reactor is equipped with a baffle, and the inner wall of the drum and the baffle are made of steel-lined fluoroplastic, A jacket is provided outside the rotary reactor).

[0049] (2) Start the drum of the rotary reactor, adjust the rotating speed to 20 rpm, vacuumize the drum of the rotary reactor to a pressure of -0.06MPa, and fill the reactor with nitrogen at 55°C to increase the pressure To 0.4MPa, a...

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Abstract

The invention belongs to the field of high polymer material preparation. Specifically, the invention relates to a chlorinated methyl methacrylate-butadiene-styrene copolymer (CMBS) and a preparation method thereof through gas-solid phase reactions. The preparation method comprises the following steps: adding polymethyl methacrylate-butadiene-styrene (MBS) powder and an anti-bonding agent into a rotary reactor or a tank reactor with a stirring function, wherein the dosage of the anti-bonding agent is 0-6% of the mass of the MBS powder; starting a rotary drum of the rotary reactor or stirring function of the tank reactor, vacuumizing, then adding an initiator, introducing chlorine into the reactor, controlling the mixed gas introducing speed, carrying out reactions, and controlling the reaction temperature to be less than or equal to 80 DEG C in the whole process; repeating the chlorination process for multiple times, washing the reaction product until the pH value is larger than 6, thenperforming suction filtration, and drying to CMBS powder. The chlorine content of CMBS is 8%-30%. The prepared CMBS can be used as a weather-resistant transparent impact modifier for polyvinyl chloride, engineering plastic and special synthetic rubber.

Description

technical field [0001] The invention belongs to the field of polymer material preparation, and in particular relates to a chlorinated polymethyl methacrylate-butadiene-styrene copolymer (hereinafter referred to as CMBS) and a gas-solid phase reaction preparation method thereof. Background technique [0002] Polyvinyl chloride (hereinafter referred to as PVC) is a general-purpose synthetic resin with a wide range of uses. When it is used as a transparent hard product, an impact modifier needs to be added. The transparent impact modifier currently available on the market is methacrylic acid Methyl ester-butadiene-styrene copolymer (MBS), but because the butadiene in MBS contains double bonds, it is not weather-resistant, so it cannot be used outdoors. At present, the weather-resistant transparent grade PVC impact modifier is still blank. MBS is chlorinated to make it a saturated structure, and the transparency is basically not affected. The prepared CMBS can be used as a weat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F279/06C08F8/22
CPCC08F8/22C08F279/06
Inventor 白杰白爽
Owner 杭州新元化工技术开发有限公司
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