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Preparation method of scratch-resistant high-impact-resistance PMMA (polymethyl methacrylate) material

A high-impact and scratch-resistant technology, which is applied in the preparation of high-impact PMMA materials and in the field of scratch resistance, can solve the problems of low surface hardness and low impact resistance of PMMA, and achieve a stable and controllable reaction system. The effect of easy operation and simple preparation method

Inactive Publication Date: 2017-05-31
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 of low surface hardness and low impact resistance of PMMA, and to provide a method for preparing a scratch-resistant, high-impact PMMA material with simple methods and easy control of steps

Method used

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  • Preparation method of scratch-resistant high-impact-resistance PMMA (polymethyl methacrylate) material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Weigh 80 parts of main monomer MMA, 5 parts of butyl acrylate, 15 parts of styrene, initiator 15×10 parts by weight -4 0.2 parts of chain transfer agent, placed in a three-necked flask equipped with a reflux condensing device, a thermometer, and a stirring rod, and stirred evenly, heated in an oil bath to 110°C, and the stirring speed was 350r / min. As the reaction progressed, the viscosity of the system gradually Increase, when the reaction time is 4h50min, increase the stirring speed to 450r / min, continue the constant temperature reaction for 3h40min, and form a viscous copolymerization product; stop the reaction, take out the copolymerization product after the system is cooled, dissolve it completely with acetone, and then settle it with methanol The copolymer was taken out, filtered, and dried in an oven at a drying temperature of 100° C. for 3 hours to obtain a methyl methacrylate-butyl acrylate-styrene copolymer.

Embodiment 2

[0015] Weigh 70 parts of main monomer MMA, 10 parts of butyl acrylate, 15 parts of styrene, initiator 25×10 parts by weight -4 0.2 parts of chain transfer agent, placed in a three-necked flask equipped with a reflux condensing device, a thermometer, and a stirring rod, and stirred evenly, heated in an oil bath to 108°C, and the stirring speed was 350r / min. As the reaction progressed, the viscosity of the system gradually Increase, when the reaction time is 3h20min, increase the stirring speed to 450r / min, continue the constant temperature reaction for 3h20min, and form a viscous copolymerization product; stop the reaction, take out the copolymerization product after the system is cooled, dissolve it completely with acetone, and then settle it with methanol The copolymer was taken out, filtered, and dried in an oven at a drying temperature of 100° C. for 3 hours to obtain a methyl methacrylate-butyl acrylate-styrene copolymer.

Embodiment 3

[0017] Weigh 100 parts of main monomer MMA, 10 parts of butyl acrylate, 5 parts of styrene, initiator 35×10 parts by weight -4 0.3 parts of chain transfer agent, placed in a three-necked flask equipped with a reflux condensing device, a thermometer, and a stirring rod, and stirred evenly, heated in an oil bath to 112°C, and the stirring speed was 500r / min. As the reaction progressed, the viscosity of the system gradually Increase, when the reaction time is 3h20min, increase the stirring speed to 450r / min, continue the constant temperature reaction for 3h20min, and form a viscous copolymerization product; stop the reaction, take out the copolymerization product after the system is cooled, dissolve it completely with acetone, and then settle it with methanol The copolymer was taken out, filtered, and dried in an oven at a drying temperature of 60° C. for 8 hours to obtain a methyl methacrylate-butyl acrylate-styrene copolymer.

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Abstract

The invention relates to a preparation method of a scratch-resistant high-impact-resistance PMMA (polymethyl methacrylate) material. The method comprises the following steps: taking 70-100 parts of main monomer methyl methacrylate, 5-10 parts of butyl acrylate, 5-15 parts of styrene, 15*10<-4>-35*10<-4> part of initiator and 0.1-0.3 part of chain-transfer agent, sufficiently stirring and uniformly mixing, adding the mixture into a three-neck flask provided with a reflux condensing unit, stirring at the speed of 300-500 r / min at 108-112 DEG C, and carrying out after-treatment to obtain the methyl methacrylate-butadiene copolymer. The preparation method is simple, and the steps are easy to operate. By adopting the mass polymerization process and adding the materials at one time, the whole reaction system is stable and controllable. The prepared methyl methacrylate-styrene-butyl acrylate copolymer has the advantages of high purity, favorable surface scratch resistance and favorable impact resistance.

Description

technical field [0001] The invention relates to a preparation method of scratch-resistant and high-impact PMMA material, which belongs to the technical field of polymer preparation. Background technique [0002] Polymethyl methacrylate, commonly known as acrylic or plexiglass, has extremely high transparency, corrosion resistance, certain UV resistance, weather resistance, and is easy to process. It is widely used in many fields such as automobiles, advertising signs, sanitary ware, lamps, medicine, etc., and its application fields penetrate into almost all aspects of life. It has always been one of the most important polymer materials in the global market. In recent years, due to the rapid growth of LED flat-panel TVs, there has been a strong market demand for PMMA. However, due to the shortcomings of PMMA's low surface hardness and low impact resistance, the application of PMMA materials in related fields is limited. [0003] PMMA polymerization technology includes suspen...

Claims

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Application Information

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IPC IPC(8): C08F220/14C08F220/18C08F212/08C08F2/38C08F2/02
CPCC08F2/02C08F2/38C08F220/14C08F220/1804C08F212/08
Inventor 朱彩霞沈斌君沈伟董文天
Owner SUZHOU DOUBLE ELEPHANT OPTICAL MATERIALS CO LTD
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