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Modified polymethyl methacrylate, optical thin film material, preparation method of optical thin film material and polaroid

A technology of polymethyl methacrylate and optical film, which is applied in the direction of optics, optical components, polarizing components, etc., can solve the problems of inability to meet high temperature resistance, negative refractive index, poor high temperature resistance, etc., and achieve a solution to the retardation value Higher, promoting compatibility, and solving the effect of poor high temperature resistance

Pending Publication Date: 2021-07-23
SHENZHEN SELEN SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a modified polymethyl methacrylate, which aims to solve the problem of poor high temperature resistance and negative refractive index of existing acrylic film materials, which cannot meet the requirements of PVA for polarizers in the current market. High temperature resistance and low retardation requirements of protective film

Method used

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  • Modified polymethyl methacrylate, optical thin film material, preparation method of optical thin film material and polaroid
  • Modified polymethyl methacrylate, optical thin film material, preparation method of optical thin film material and polaroid
  • Modified polymethyl methacrylate, optical thin film material, preparation method of optical thin film material and polaroid

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preparation example Construction

[0025] The preparation method of this modified PMMA comprises the steps:

[0026] Step S101: dissolving polymethyl methacrylate in an organic solvent and controlling the solid content between 5% and 15% to form a first mixed solution.

[0027] In the embodiment of the present invention, the polymethyl methacrylate raw material is a resin material with good transparency. Preferably, the aforementioned polymethyl methacrylate is a copolymerized polymethyl methacrylate with an average molecular weight of 70,000-130,000. The interior of the copolymerized polymethyl methacrylate includes, but is not limited to, an alicyclic structure, a heterocyclic structure, or a structure containing an aromatic group in a constituent unit. For example, the grade of copolymerized PMMA can be R100 from Nippon Denki Chemical Co., Ltd.

[0028] Step S102: Under an anhydrous and oxygen-free environment, phenol or phenol homologues and an organic solvent are stirred evenly in an ice-water bath to ob...

Embodiment 1

[0045] The modified PMMA that present embodiment provides, the structural formula of its polymer is as follows:

[0046]

[0047] The preparation reaction equation of its modified PMMA is as follows:

[0048]

[0049] Take by weighing 5 parts of PMMA resin in molar weight, be dissolved in the organic solvent DMF, be made into PMMA-DMF organic solution; into a solution with a mass fraction of 10%, and stir evenly in an ice-water bath; when stirring, alternately vacuumize and vent nitrogen in the three-necked bottle to ensure that the inside of the three-necked bottle is in an anhydrous and oxygen-free environment; Inject 2 parts (molar amount) of lithium diisopropylamide (LDA); after stirring for 60 minutes, pour the PMMA-DMF organic solution into the three-necked bottle; the three-necked bottle is in an anhydrous and oxygen-free environment; remove the ice-water bath, and Continue to stir the mixed solvent in the bottle for 30 minutes, raise the reaction temperature to ...

Embodiment 2

[0053] The modified PMMA that present embodiment provides, the structural formula of its polymer is as follows:

[0054]

[0055] The preparation reaction equation of its modified PMMA is as follows:

[0056]

[0057] Take by weighing 2.5 parts of PMMA resin in molar weight, be dissolved in the organic solvent DMF, be made into PMMA-DMF organic solution; into a solution with a mass fraction of 10%, and stir evenly in an ice-water bath; when stirring, alternately vacuumize and vent nitrogen in the three-necked bottle to ensure that the inside of the three-necked bottle is in an anhydrous and oxygen-free environment; Inject 1 part (molar amount) of lithium diisopropylamide (LDA); after stirring for 30 minutes, pour the PMMA-DMF organic solution into the three-necked bottle; the three-necked bottle is in an anhydrous and oxygen-free environment; remove the ice-water bath, and Continue to stir the mixed solvent in the bottle for 60 minutes, increase the reaction temperature...

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Abstract

The invention is suitable for the technical field of materials, and provides modified polymethyl methacrylate, an optical thin film material, a preparation method of the optical thin film material and a polarizer. The modified polymethyl methacrylate is obtained by taking polymethyl methacrylate as a matrix and introducing a phenyl ester functional group on a polymethyl methacrylate molecular chain. The modified polymethyl methacrylate obtained by the invention not only can improve the high temperature resistance of polymethyl methacrylate, but also is beneficial to promoting the compatibility with polycarbonate; besides, the modified polymethyl methacrylate is compounded with polycarbonate to form a film, and the benzene ring structure and the positive birefringence characteristic of polycarbonate are combined, so that the problems of poor high temperature resistance and relatively high delay value of the current polymethyl methacrylate can be well solved; and the preparation requirements of the polyvinyl alcohol protective film for the polaroid by using the acrylate film are met.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a modified polymethyl methacrylate, an optical film material and a preparation method thereof, and a polarizer. Background technique [0002] Polyvinyl alcohol film (PVA film), which plays a leading role in polarizers, often requires a protective film due to its weak mechanical properties and being easily affected by temperature and humidity. The traditional PVA protective film uses TAC film, which has excellent optical transparency and good hydrophilic properties. However, the industrial production of TAC film usually adopts the solution casting method, and the source of raw materials is highly concentrated in Japanese manufacturers. The production cost is high and the manufacturing cost is high. High difficulty. In recent years, it has gradually become a trend to develop new PVA protective films for polarizers in the market to replace TAC films, especially acryli...

Claims

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Application Information

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IPC IPC(8): C08F8/00C08F120/14C08J5/18C08L33/12C08L69/00G02B5/30
CPCC08F8/00C08J5/18G02B5/3025G02B5/305C08J2333/12C08J2469/00C08F120/14
Inventor 高西萍胡树刘秋明程士心孙立民蔡绪福张利利
Owner SHENZHEN SELEN SCI & TECH CO LTD
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