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Polymethacrylate composition and its formed optical element and display device

A technology of polymethacrylate and methacrylate, which is applied in optical components, optics, instruments, etc., can solve the problems that polymethacrylate compositions cannot fully display optical properties, deterioration, appearance defects, etc., and achieve Display excellent, excellent heat resistance effect

Active Publication Date: 2022-01-25
CHI MEI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, how to make polymethacrylate both have good optical properties and heat resistance is a subject that needs to be improved in this field. In addition, during subsequent processing and molding, high-temperature thermal processing is easy to make the polymethacrylate composition Deterioration or yellowing, or even appearance defects, will make the polymethacrylate composition unable to fully demonstrate its original good optical properties

Method used

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  • Polymethacrylate composition and its formed optical element and display device
  • Polymethacrylate composition and its formed optical element and display device
  • Polymethacrylate composition and its formed optical element and display device

Examples

Experimental program
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Effect test

preparation example Construction

[0106] Preparation of methacrylate polymers:

[0107] First, mix 95 parts by weight of methyl methacrylate, 5 parts by weight of methyl acrylate, 0.4 parts by weight of n-dodecyl mercaptan, 0.08 parts by weight of 2,2'-azobisisobutyronitrile, and 66 parts by weight of toluene After that, it is continuously sent to the reaction tank for continuous solution polymerization. The above-mentioned reaction tank is a sandwich structure with heat medium oil circulation, and the reaction temperature is maintained at 100° C. and the pressure is 600 torr. Thoroughly stir the components in the reaction tank to make them evenly mixed, and heat the obtained polymer solution to 265°C, then use a continuous devolatilization device to devolatilize the above polymer solution under reduced pressure, and then pass it through the extrusion equipment to produce strips. After cooling and pelletizing, polymethyl methacrylate plastic particles are obtained. The polymethyl methacrylate plastic partic...

Embodiment 1 to 2

[0121] Embodiment 1 to 2 is that methacrylate polymer and styrene-maleic anhydride copolymer are mixed according to the ratio listed in table 1, wherein methacrylate polymer and styrene-maleic anhydride The total amount of copolymers is 100 parts by weight, and organophosphorus compounds, heat stabilizers, antioxidants and ultraviolet absorbers are added, mixed and extruded by an extruder at 240°C, and the polymethacrylate compositions are obtained respectively . The content values ​​of organophosphorus compounds, heat stabilizers, antioxidants and ultraviolet absorbers listed in Table 1 are the polymethacrylate compositions of Examples 1 to 2 analyzed by high performance liquid chromatography (HPLC) The actual content value measured later. Detection of haze (HAZE), yellowness (YI), light transmittance (T%), glass transition temperature (Tg), and thermal cracking temperature (Td) of the polymethacrylate composition of Examples 1 to 2 The results are also shown in Table 1.

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Abstract

The invention provides a polymethacrylate composition and the formed optical element and display device. The polymethacrylate composition comprises 50 to 85 parts by weight of methacrylate polymers and its weight average molecular weight (Mw) is 20,000 to 200,000, and 15 to 50 parts by weight of styrene-based polymers. Anhydride-based copolymers and organic phosphorus compounds. The methacrylate polymer includes methacrylate monomer units and acrylate monomer units. The styrene-maleic anhydride copolymer comprises 76.5wt% to 90wt% of styrenic monomer units, 10wt% to 23.5wt% of maleic anhydride monomer units and 0 to 13.5wt% of the second Copolymerizable monomer units. The content of the organophosphorus compound ranges from 200ppm to 900ppm.

Description

technical field [0001] The invention relates to a polymer composition, in particular to a polymethacrylate composition and the formed optical element and display device. Background technique [0002] Polymethacrylate (polymethacrylate) is a polymer with a wide range of uses. It has good evaluations in terms of processability, physical properties and mechanical properties, and its light transmittance is equivalent to that of glass, and the appearance of molded products is good. Therefore, it has become the current One of the most excellent polymer transparent materials, and is often used in various optical components or consumer goods, such as camera lenses, lenses, optical films, car taillights, billboards, etc. [0003] In recent years, with the development of thin and lightweight notebook computers, the demand for thinner and higher performance optical elements in display devices such as liquid crystal display devices has also increased. Moreover, as the application envir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/12C08L35/06C08K13/02C08K5/526C08K5/3475G02B1/04
CPCC08K2201/014C08L33/12C08L2201/08G02B1/04C08L35/06C08K13/02C08K5/526C08K5/3475C08L25/08
Inventor 谢尚儒
Owner CHI MEI CORP
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