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Chlorinated acrylonitrile-butadiene-styrene copolymer resin and preparation method thereof

The technology of styrene copolymer resin and chlorinated acrylonitrile is applied in the field of chlorinated acrylonitrile-butadiene-styrene copolymer resin and its preparation, which can solve the problems of poor weather resistance, easy oxidative degradation and the like, and achieve strong weather resistance , the effect of increasing saturation

Inactive Publication Date: 2019-04-12
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

This is because the double bond contained in the butadiene component in the ABS molecule is easily oxidized and degraded under the action of ultraviolet light, resulting in poor weather resistance, so it cannot be used outdoors.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0017] The invention provides a kind of preparation method of chlorinated acrylonitrile-butadiene-styrene copolymer resin, comprises the following steps:

[0018] 1) Under the condition of stirring, the acrylonitrile-butadiene-styrene copolymer resin powder is mixed with the anti-blocking agent, and the first vacuum pumping-nitrogen filling-pressure release is carried out sequentially to obtain the mixture;

[0019] 2) Under stirring conditions, after the mixture obtained in the step 1) is mixed with the initiator, the second vacuum pumping-chlorine gas-exhausting waste gas is circulated successively to obtain chlorinated acrylonitrile-butadiene-styrene copolymer resin; The pressure after the second vacuuming is -0.09~-0.05MPa, and the pressure after chlorine filling is 0.05~0.2MPa.

[0020] Under the condition of stirring, the present invention mixes the acrylonitrile-butadiene-styrene copolymer resin powder and the anti-blocking agent, and performs vacuum pumping-nitrogen fi...

Embodiment 1

[0040] 1) Select acrylonitrile-butadiene-styrene copolymer resin powder (ABS powder) with volatile content of 0.31wt%, average particle size of 170 μm, and rubber mass content of 60%, pass through a 30-mesh sieve, take 80.0kg, and place it in a 250L rotary 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, Jacket is arranged outside the rotary reactor), add 1.2kg hydrophobic white carbon black (average particle diameter 10 μ m), start the rotating drum of rotary reactor, adjust the rotating speed to be 15 rev / mins, give the rotating speed of rotary reactor Vacuum the drum to a pressure of -0.08MPa, fill the reactor with nitrogen at 50°C to raise the pressure to 0.2MPa, and after releasing the pressure, repeat the vacuuming-nitrogen filling-pressure releasing operation 4 ...

Embodiment 2

[0046] The 1.2kg hydrophobic white carbon black (average particle diameter 10 μ m) in the embodiment 1 is changed into 1kg3500 order superfine talcum powder, and 200g azobisisoheptanonitrile is changed into 180g benzoyl peroxide.

[0047] The reaction conditions were changed from 7 times of filling with chlorine gas, each time the pressure was up to 0.4Mpa, to 6 times of filling with chlorine gas, each time the pressure was up to 0.7Mpa.

[0048] Other reaction conditions are identical with embodiment 1.

[0049] The test results of the obtained CMBS resin product: the chlorine content is 19.6%, and the volatile matter is 0.3%.

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Abstract

The invention provides chlorinated acrylonitrile-butadiene-styrene copolymer resin and a preparation method thereof, and belongs to the technical field of engineering plastic preparation. The preparation method comprises the following steps: mixing acrylonitrile-butadiene-styrene copolymer resin powder and an anti-adhesion agent under stirring, performing primary vacuumizing, introducing nitrogen,and performing decompression to obtain a mixture, wherein the primary vacuumizing, nitrogen introduction and decompression are cycled for a plurality of times; and after the obtained mixture and an initiator are mixed, performing secondary vacuumizing, introducing a chlorine gas, and discharging a waste gas to obtain the chlorinated acrylonitrile-butadiene-styrene copolymer resin, wherein the secondary vacuumizing, the chlorine gas introduction and discharge of the waste gas are cycled for a plurality of times, the pressure after the secondary vacuumizing is -0.09 to -0.05 MPa, and the pressure after the chlorine gas is introduced is 0.05 to 0.2 MPa. The chlorinated acrylonitrile-butadiene-styrene copolymer resin prepared by the preparation method has uniform distribution of a chlorine element in the product, a high product saturation degree and strong weather resistance.

Description

technical field [0001] The invention relates to the technical field of engineering plastics preparation, in particular to a chlorinated acrylonitrile-butadiene-styrene copolymer resin and a preparation method thereof. Background technique [0002] Acrylonitrile-butadiene-styrene copolymer resin (hereinafter referred to as ABS) is a general-purpose engineering plastic with a wide range of uses, and it has good mechanical properties. After being exposed to sunlight, heat, and oxygen for a long time outdoors, ABS products will appear yellowing, brittle, cracked, surface tarnished, and mechanical properties greatly reduced, and eventually lose their use value. This is because the double bonds contained in the butadiene component in the ABS molecule are easily oxidatively degraded under the action of ultraviolet rays, resulting in poor weather resistance, so they cannot be used outdoors. Contents of the invention [0003] In view of this, the object of the present invention is...

Claims

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Application Information

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IPC IPC(8): C08F8/22C08F279/04
CPCC08F8/22C08F279/04
Inventor 白杰
Owner 杭州新元化工技术开发有限公司