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Methyl methacrylate-styrene copolymer resin, its preparation method and use

A technology of methyl methacrylate and styrene copolymer resin, which is applied in the field of preparation of methyl methacrylate-styrene copolymer resin, and can solve the problems of environmental protection and production economy.

Active Publication Date: 2021-02-02
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the solution polymerization process needs to use benzene solvents, there are problems of solvent residue and recovery, and it is not as good as the bulk polymerization process in terms of environmental protection and production economy.

Method used

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  • Methyl methacrylate-styrene copolymer resin, its preparation method and use
  • Methyl methacrylate-styrene copolymer resin, its preparation method and use
  • Methyl methacrylate-styrene copolymer resin, its preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Ingredients: Add 50 parts by mass of methyl methacrylate, 50 parts by mass of styrene, 0.02 parts by mass of tert-butyl peroxy-3,5,5-trimethylhexanoate, 0.15 parts by mass of tert-dodecane into the batching tank base mercaptan, mixed well to prepare the reaction solution. Nitrogen was passed to fully exclude oxygen.

[0060] One-stage reaction: The reaction solution after batching is continuously added to the one-stage fully mixed flow reactor (effective volume 25L) at a flow rate of 10KG / h, the temperature in the reactor is controlled at 135°C, the average residence time is 2h, and the outlet conversion rate is 54%.

[0061] Two-stage reaction: The one-stage slurry obtained in the one-stage reaction step is continuously sent into the two-stage tubular reactor (effective volume 10L) at a flow rate of 10KG / h, and 0.01 parts by mass of di-tert-butyl peroxide is added, and 0.03 parts by mass P-methylthiophenol is mixed with the slurry by a static mixer to carry out two-st...

Embodiment 2

[0064] Ingredients: Add 50 parts by mass of methyl methacrylate, 50 parts by mass of styrene, 0.02 parts by mass of tert-butyl peroxy-3,5,5-trimethylhexanoate, 0.2 parts by mass of tert-dodecane into the batching tank Base mercaptan; fully mixed to prepare the reaction solution; nitrogen, fully exclude oxygen.

[0065] One-stage reaction: The reaction solution after batching is continuously added to the one-stage fully mixed flow reactor (effective volume 25L) at a flow rate of 10KG / h, the temperature inside the reactor is controlled at 135°C, the average residence time is 2h, and the outlet conversion rate is 53%.

[0066] Two-stage reaction: The one-stage slurry obtained in the one-stage reaction step is continuously sent into the two-stage tubular reactor (effective volume 10L) at a flow rate of 10KG / h, and 0.01 mass parts of di-tert-butyl peroxide is added, and 0.05 mass parts of The methyl thiophenol is mixed with the slurry by a static mixer to carry out two-stage polyme...

Embodiment 3

[0069] Ingredients: Add 50 parts by mass of methyl methacrylate, 50 parts by mass of styrene, 0.02 parts by mass of tert-butyl peroxy-3,5,5-trimethylhexanoate, 0.3 parts by mass of tert-dodecane into the batching tank Base mercaptan; fully mixed to prepare the reaction solution; nitrogen, fully exclude oxygen.

[0070] One-stage reaction: The reaction solution after batching is continuously added to the one-stage fully mixed flow reactor (effective volume 25L) at a flow rate of 10KG / h, the temperature in the reactor is controlled at 135°C, the average residence time is 2h, and the outlet conversion rate is 52%.

[0071] Two-stage reaction: The one-stage slurry obtained in the one-stage reaction step is continuously sent into the two-stage tubular reactor at a flow rate of 10KG / h, and 0.01 mass parts of di-tert-butyl peroxide and 0.08 mass parts of p-methylthiophenol are added. The slurry is mixed with a static mixer to carry out two-stage polymerization reaction; the temperatu...

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Abstract

The invention relates to a methyl methacrylate-styrene copolymer resin, its preparation method and application. The copolymer resin of the present invention is prepared by copolymerizing 20-90 parts by mass of methyl methacrylate and 10-80 parts by mass of styrene monomer. The polymerization stage adopts a continuous bulk polymerization process without adding any solvent. The polymerization reaction is divided into two stages, and the process conditions and outlet conversion rate of each stage are controlled. By controlling the type and amount of chain transfer agent added in each stage of polymerization reaction, methyl methacrylate with stable and controllable molecular weight is finally obtained. Styrene copolymer resin. The reaction solution is devolatilized and extruded to obtain the final particle product.

Description

technical field [0001] The present invention relates to a kind of methyl methacrylate-styrene copolymer resin, its preparation method and application, especially to a method of adopting continuous bulk polymerization process and adding chain transfer agent in sections to prepare methyl methacrylate-styrene Methods of copolymerizing resins. Background technique [0002] Methyl methacrylate-styrene copolymer resin (MS) is a commonly used transparent plastic, which is mainly prepared by free radical polymerization of two monomers, methyl methacrylate and styrene. In some application fields, it has more excellent properties than polymethyl methacrylate (PMMA), such as good processability, low moisture absorption, solvent resistance, and lower cost, and it also has excellent permeability. light rate. Therefore, it is widely used in light guide plates, daily necessities, cosmetic packaging and other application fields. [0003] The preparation method of methyl methacrylate-styr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/14C08F212/08C08F2/38
CPCC08F2/38C08F212/08C08F220/14
Inventor 刘波石建刘铭黄岐善
Owner WANHUA CHEM GRP CO LTD