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Low-molecular-weight narrow-distribution styrene-maleic anhydride copolymer and preparation method thereof

A technology of maleic anhydride and low molecular weight, which is applied in the field of low molecular weight narrow distribution styrene-maleic anhydride copolymer and its preparation, and can solve problems affecting the health of operators, large odor, and large odor

Active Publication Date: 2020-06-05
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the molecular weight regulators used are mercaptans, which have a strong odor, and it is difficult to eliminate the residual molecular weight regulator in the post-treatment process of the product. Therefore, the synthesis of styrene-maleic acid copolymers by this method is often difficult. Larger odor will pollute the environment and affect the health of operators

Method used

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  • Low-molecular-weight narrow-distribution styrene-maleic anhydride copolymer and preparation method thereof
  • Low-molecular-weight narrow-distribution styrene-maleic anhydride copolymer and preparation method thereof
  • Low-molecular-weight narrow-distribution styrene-maleic anhydride copolymer and preparation method thereof

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preparation example Construction

[0025] The invention provides a kind of preparation method of low molecular weight narrow distribution styrene-maleic anhydride copolymer, comprises the following steps:

[0026] Mix styrene, maleic anhydride and an initiator, polymerize the resulting mixture, and devolatilize the resulting reaction material to obtain a low-molecular-weight narrow-distribution styrene-maleic anhydride copolymer and an extraction material; Post-processing;

[0027] The temperature of the polymerization reaction is 130-300°C; the polymerization reaction is carried out in a tubular reactor with a static mixer;

[0028] The initiator is a thermal decomposition type initiator, and the thermal decomposition type initiator includes an organic peroxide type initiator and an azo type initiator;

[0029] Described organic peroxide initiator comprises benzoyl peroxide, lauroyl peroxide, di-tert-butyl peroxide, dicumyl peroxide, tert-butyl peroxybenzoate or diisopropyl peroxydicarbonate ester;

[0030]...

Embodiment 1

[0046] Material ratio: reaction solvent cyclohexanone 30kg, accounting for 30% of the total mass of all materials; maleic anhydride to styrene molar ratio 1:9, maleic anhydride 6.6kg, styrene 63.4kg; initiator azobisisobutyl Nitrile 0.21kg, the quality of described initiator accounts for 0.3% of the total mass of maleic anhydride and styrene.

[0047] Preparation of copolymer: Add styrene, maleic anhydride, initiator and reaction solvent into the monomer mixing reactor, exhaust the air with nitrogen and mix until the maleic anhydride dissolves, and then send the resulting mixture to In the tubular reactor at 200°C, the residence time of the mixed material is 10min, and the obtained reaction material is transported to the devolatilizer for devolatilization to obtain low molecular weight narrow distribution styrene-maleic anhydride copolymer and the exfoliated material; The low molecular weight narrow distribution styrene-maleic anhydride copolymer obtained by volatilization is ...

Embodiment 2

[0049] The only difference from Example 1 is that the residence time of the mixed material in the tubular reactor at 220° C. is 10 min.

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Abstract

The invention provides a low-molecular-weight narrow-distribution styrene-maleic anhydride copolymer and a preparation method thereof, and belongs to the technical field of high polymer material preparation. The styrene-maleic anhydride copolymer is prepared by adopting a high-temperature continuous free radical polymerization method, the method is simple in process, low in solvent and initiator consumption, low in cost, capable of realizing continuous production, short in reaction time, high in reaction rate and high in conversion rate; and the low-molecular-weight narrow-distribution styrene-maleic anhydride copolymer prepared by the method is small in molecular weight distribution range, more uniform in product molecular weight distribution and more stable in product performance, and has a good industrial prospect.

Description

technical field [0001] The invention relates to the technical field of polymer material preparation, in particular to a low molecular weight narrow distribution styrene-maleic anhydride copolymer and a preparation method thereof. Background technique [0002] Styrene-maleic anhydride copolymer is an important functional polymer material, which has good heat resistance, low melt viscosity, excellent processability, good chemical stability, high hardness, high transparency and is compatible with other polymers. Good material compatibility and other advantages, widely used in construction, electrical appliances, automobile manufacturing, office supplies, coatings, chemicals, pharmaceuticals and drilling industries. According to the different molecular structures, it can be divided into alternating copolymers and random copolymers; according to the molecular weight, it can be divided into high molecular weight and low molecular weight styrene-maleic anhydride copolymers. High m...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F222/08C08F2/01
CPCC08F212/08C08F222/08C08F2500/02C08F2500/03C08F2/01
Inventor 曹春雷张志彬谭志勇张会轩
Owner CHANGCHUN UNIV OF TECH
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