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Preparation method of methyl methacrylate-styrene copolymer

A technology of methyl methacrylate and styrene copolymer, which is applied in the field of polymer copolymer preparation, can solve the problems of low product purity, poor light transmittance, and complicated preparation methods, and achieve simple operation, easy control of polymerization reaction, The reaction system is stable and controllable

Inactive Publication Date: 2015-09-30
SUZHOU DOUBLE ELEPHANT OPTICAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the preparation method of methyl methacrylate-styrene copolymer is complicated in the prior art, and the prepared product has low purity and poor light transmittance, and provides a simple preparation method, no solvent, green Preparation method of environmentally friendly methyl methacrylate-styrene copolymer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] In a 250mL flask equipped with a reflux condensing device, add monomers 190g methyl methacrylate and 10g styrene, 0.006g initiator peroxy-2-ethylhexanoic acid tert-butyl ester and 0.3g chain transfer agent n-octyl thio Alcohol; Stir to mix evenly, heat the oil bath to 100°C; control the stirring speed to 300r / min, when the viscosity of the polymerization system increases, increase the stirring speed to 400r / min appropriately, and react at constant temperature for 7h20min to form a viscous Copolymerization product; stop the reaction, let it stand, after the system cools down, smash the flask to take out the copolymerization product, dissolve it completely with acetone, then settle the copolymer with methanol, filter, dry, and grind to obtain fine granular methyl methacrylate - styrene copolymers.

Embodiment 2

[0017] In a 250mL flask equipped with a reflux condenser, add monomers 180g methyl methacrylate and 20g styrene, 0.006g initiator peroxy-2-ethylhexanoic acid tert-butyl ester and 0.3g chain transfer agent n-octyl thio Alcohol; Stir to mix evenly, heat the oil bath to 100°C; control the stirring speed to 300r / min, when the viscosity of the polymerization system increases, increase the stirring speed to 400r / min appropriately, and react at constant temperature for 8h30min to form a viscous Copolymerization product; stop the reaction, let it stand, after the system cools down, smash the flask to take out the copolymerization product, dissolve it completely with acetone, then settle the copolymer with methanol, filter, dry, and grind to obtain fine granular methyl methacrylate - styrene copolymers.

Embodiment 3

[0019] In a 250mL flask equipped with a reflux condenser, add monomer 160g methyl methacrylate and 40g styrene, 0.007g initiator peroxy-2-ethylhexanoic acid tert-butyl ester and 0.3g chain transfer agent n-octyl thio Alcohol; Stir to mix evenly, heat the oil bath to 100°C; control the stirring speed to 300r / min, when the viscosity of the polymerization system increases, increase the stirring speed to 400r / min appropriately, and react at constant temperature for 9h20min to form a viscous Copolymerization product; stop the reaction, let it stand, after the system cools down, smash the flask to take out the copolymerization product, dissolve it completely with acetone, then settle the copolymer with methanol, filter, dry, and grind to obtain fine granular methyl methacrylate - styrene copolymers.

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Abstract

The invention relates to a preparation method of a methyl methacrylate-styrene copolymer. Firstly, 40-100 parts of main monomer methyl methacrylate, 5-60 parts of comonomer styrene, 10*10<-4>-150*10<-4> part of initiators and 0.1-0.5 part of chain transfer agents are taken and fully stirred till mixtures are evenly mixed, the mixtures are added into a reactor provided with a backflow condensation device, then oil-bath heating and temperature raising are performed, the reaction temperature is controlled between 90 DEG C and 150 DEG C, a reaction lasts for 7-11 h at the rotation speed of 300-500 r / min, a thick copolymer is formed, and finally the methyl methacrylate-styrene copolymer is formed through sedimentation, filtration and drying. According to the preparation method, polymerization is performed in a one-time feeding mode, operation is easy, a polymerization reaction is easy to control, a whole reaction system is stable and controllable, and the prepared methyl methacrylate-styrene copolymer is high in purity and has good light transmittance.

Description

technical field [0001] The invention relates to a method for preparing a methyl methacrylate-styrene copolymer, belonging to the technical field of polymer copolymer preparation. Background technique [0002] As a general-purpose resin, methyl methacrylate-styrene copolymer (MS) combines the advantages of the two monomer homopolymer resins and makes up for the shortcomings. It not only has good transparency, gloss and relatively High impact strength, and when processing and molding, the melt viscosity is not high, and the fluidity is good. At the same time, in terms of the market, methyl methacrylate-styrene copolymer has the advantages of light weight and low price, and is widely used in cosmetics, billboards, lighting materials, building materials and other fields. [0003] The preparation methods of methyl methacrylate-styrene copolymer mainly include bulk polymerization, emulsion polymerization and suspension polymerization. Among them, no solvent and water are used in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F212/08C08F2/38
Inventor 孔德成沈斌君李国芳沈伟
Owner SUZHOU DOUBLE ELEPHANT OPTICAL MATERIALS CO LTD
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