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Polymethyl methacrylate and preparation method thereof

A technology of polymethyl methacrylate and parts of methyl methacrylate is applied in the field of polymethyl methacrylate and its preparation, and can solve the problem of improving heat resistance, loss of fluidity, and disadvantage of injection molding of polymethyl methacrylate. Influence, heat resistance and fluidity are difficult to balance and other issues

Active Publication Date: 2017-06-06
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of such technologies tends to reduce the fluidity of polymethyl methacrylate
This can adversely affect the injection molding process of PMMA
[0006] It can be seen from the above that for high heat-resistant polymethyl methacrylate products, it is generally difficult to balance heat resistance and fluidity, and fluidity is often lost while improving heat resistance

Method used

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  • Polymethyl methacrylate and preparation method thereof
  • Polymethyl methacrylate and preparation method thereof
  • Polymethyl methacrylate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Add 95 parts by mass of methyl methacrylate, 2 parts by mass of isobornyl methacrylate, 3 parts by mass of dicyclopentyl methacrylate, 0.5 part of azobisisobutyronitrile, 0.35 part of n-dodecylsulfide in the batching tank Alcohol, stir evenly to prepare the oil phase. In addition, add 0.3 parts of polyvinyl alcohol 1788 and 200 parts of deionized water into the reactor, stir and dissolve to prepare the water phase evenly. Add the oil phase material in the batching tank to the water phase of the reaction kettle, fully replace it with nitrogen, and start stirring at the same time to prepare a suspension.

[0057] The reaction kettle was heated through an oil bath, and the temperature was gradually raised to 70° C. to start polymerization. After reacting at 70°C for 3h, the temperature was raised to 90-100°C for further reaction for 2h. End the reaction.

[0058] The obtained reaction product was filtered, washed with water, and dried at 80° C. for 24 hours to obtain a ...

Embodiment 2

[0060] Add 80 parts by mass of methyl methacrylate, 10 parts by mass of isobornyl methacrylate, 10 parts by mass of dicyclopentyl methacrylate, 0.5 parts of azobisisobutyronitrile, 0.35 parts of n-dodecylsulfide in the batching tank Alcohol, stir evenly to prepare the oil phase. In addition, add 0.3 parts of polyvinyl alcohol 1788 and 200 parts of deionized water into the reactor, stir and dissolve to prepare the water phase evenly. Add the oil phase material in the batching tank to the water phase of the reaction kettle, fully replace it with nitrogen, and start stirring at the same time to prepare a suspension.

[0061] The reaction kettle was heated through an oil bath, and the temperature was gradually raised to 70° C. to start polymerization. After reacting at 70°C for 3h, the temperature was raised to 90-100°C for further reaction for 2h. End the reaction.

[0062] The obtained reaction product was filtered, washed with water, and dried at 80° C. for 24 hours to obtai...

Embodiment 3

[0064] Add 70 parts by mass of methyl methacrylate, 10 parts by mass of isobornyl methacrylate, 20 parts by mass of dicyclopentyl methacrylate, 0.5 part of azobisisobutyronitrile, 0.35 part of n-dodecylsulfide in the batching tank Alcohol, stir evenly to prepare the oil phase. In addition, add 0.3 parts of polyvinyl alcohol 1788 and 200 parts of deionized water into the reactor, stir and dissolve to prepare the water phase evenly. Add the oil phase material in the batching tank to the water phase of the reaction kettle, fully replace it with nitrogen, and start stirring at the same time to prepare a suspension.

[0065] The reaction kettle was heated through an oil bath, and the temperature was gradually raised to 70° C. to start polymerization. After reacting at 70°C for 3h, the temperature was raised to 90-100°C for further reaction for 2h. End the reaction.

[0066] The obtained reaction product was filtered, washed with water, and dried at 80° C. for 24 hours to obtain ...

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Abstract

The invention relates to polymethyl methacrylate and a preparation method thereof. The polymethyl methacrylate is prepared from the following raw materials: 60-95 parts by mass of methyl methacrylate, 5-40 parts by mass of a cyclic monomer and 0-10 parts by mass of a comonomer, wherein the cyclic monomer is preferably methacrylate having a bicyclic structure and methacrylate having a polycyclic structure, i.e., isobornyl methacrylate and dicyclopentanyl methacrylate. The heat resistance and melt fluidity of the polymethyl methacrylate can be improved at the same time by means of copolymerization of the cyclic monomer and the methyl methacrylate.

Description

technical field [0001] The invention relates to a polymethyl methacrylate and a preparation method thereof. In particular, it relates to a method for simultaneously improving heat resistance and fluidity by copolymerizing a (meth)acrylate monomer having a ring structure and methyl methacrylate. Background technique [0002] Polymethyl methacrylate is a (meth)acrylate polymer with many excellent properties, such as high light transmittance, good weather resistance, surface hardness, dimensional stability, and good electrical insulation. Therefore, it is widely used in automobiles, displays, electronic appliances, lighting, billboards and other fields. [0003] For applications such as automotive headlights, optical films, plastic optical fibers, and special lighting, polymethyl methacrylate has high requirements for heat resistance. At present, the Vicat softening temperature of general-purpose polymethyl methacrylate products is generally lower than 110°C, which is difficu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F220/18C08F2/18
CPCC08F2/18C08F220/14C08F220/18
Inventor 刘波刘铭李春黄岐善
Owner WANHUA CHEM GRP CO LTD
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