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Blend optical film with thermodynamic stability and preparation method thereof

A thermodynamically stable, optical thin film technology, applied in the field of polymer materials, can solve problems such as limited compatibility, different refractive indices, and increased haze, and achieve excellent transparency, high photoelastic coefficient, and low surface hardness.

Active Publication Date: 2021-03-12
聚纶材料科技(深圳)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limited compatibility and different refractive indices of the two, light interference occurs when the incident light is reflected. The surface of the PMMA / PC product actually processed has pearlescent phenomenon. Although the light transmittance does not decrease significantly, the haze increases sharply. opaque

Method used

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  • Blend optical film with thermodynamic stability and preparation method thereof
  • Blend optical film with thermodynamic stability and preparation method thereof
  • Blend optical film with thermodynamic stability and preparation method thereof

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preparation example Construction

[0081] The present application also provides a method for preparing the thermodynamically stable blend optical film provided above, comprising the following steps:

[0082] (1) Pretreatment of raw materials

[0083] The methyl methacrylate polymer, the stabilizer and the aromatic polycarbonate are separately removed from the water and then used for subsequent use;

[0084] Dry the co-solvent for later use;

[0085] (2) Preparation and refining of coating solution

[0086] Weigh a certain proportion of processed methyl methacrylate polymer, aromatic polycarbonate, stabilizer and co-solvent;

[0087] Adding methyl methacrylate polymer, aromatic polycarbonate and stabilizer to the co-solvent several times, stirring and dissolving to obtain coating mother liquor;

[0088] Filter the coating mother liquor through a filter to obtain a refined coating solution;

[0089] (3) Coating film formation

[0090] Coating the refined coating solution on the substrate, peeling off from th...

Embodiment 1

[0119] Embodiment 1, the specific steps of the preparation method of the blend optical film with thermodynamic stability are:

[0120] (1) Pretreatment of raw materials

[0121] Dry the methyl methacrylate polymer and the stabilizer in a blast oven at 70°C for 4 to 8 hours to fully remove moisture and set aside.

[0122] Dry the aromatic (co)polycarbonate in a blast oven at 90°C for 4-8 hours to fully remove moisture, and set aside.

[0123] Dry glass instruments such as flasks in a blast oven at 70°C for 6 hours to fully remove moisture and set aside.

[0124] The co-solvents were dried using molecular sieves, and then distilled under reduced pressure to obtain the middle distillate. Among them, co-solvents are analytically pure reagents.

[0125] (2) Preparation and refining of coating solution

[0126] Accurately weigh 85 parts of methyl methacrylate (MMA) polymer, 14.5 parts of aromatic (co)polycarbonate, 0.5 parts of stabilizer, and 500 parts of co-solvent.

[0127] ...

Embodiment 2

[0154] Embodiment 2, the specific steps of the preparation method of the blend optical film with thermodynamic stability are:

[0155] (1) Pretreatment of raw materials

[0156] Dry the methyl methacrylate polymer and the stabilizer in a blast oven at 100°C for 4 hours to fully remove moisture, and set aside.

[0157] Dry the aromatic (co)polycarbonate in a blast oven at 120°C for 4 hours to fully remove moisture, and set aside.

[0158] Dry glass instruments such as flasks in a blast oven at 100°C for 2 hours to fully remove moisture and set aside.

[0159] The co-solvents were dried using molecular sieves, and then distilled under reduced pressure to obtain the middle distillate. Among them, co-solvents are analytically pure reagents.

[0160] (2) Preparation and refining of coating solution

[0161] Accurately weigh 15 parts of methyl methacrylate (MMA) polymer, 80 parts of aromatic (co)polycarbonate, 5 parts of stabilizer, and 1000 parts of co-solvent.

[0162]Add the...

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Abstract

The invention relates to a blend optical film with thermodynamic stability and a preparation method thereof. The blend optical film comprises the following components in parts by weight: 15-85 parts of methacrylate polymer, 14.5-80 parts of aromatic polycarbonate and 0.5-5 parts of stabilizer. The preparation method of the blend film comprises the following steps: pretreating the raw materials, preparing and refining the coating liquid, coating to form a film, thermally stretching the film, thermally shaping the film and the like. When the methacrylic acid polymer is greater than 50%, a film hot stretching step needs to be added in the steps of coating film formation and film heat setting so as to improve the toughness of the film. The method is simple in formula and process, industrial production is easy to realize, and the colorless and transparent blend optical film with thermodynamic stability can be prepared. The blend optical film provided by the invention not only has excellentoptical characteristics of the methacrylate copolymer, but also has excellent heat resistance and toughness of aromatic (co) polycarbonate, and still shows a stable thermodynamic compatibility state at a high temperature.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a thermodynamically stable blend optical film and a preparation method thereof. Background technique [0002] Polymethyl methacrylate (PMMA) is the most widely used acrylic plastic, commonly known as plexiglass or acrylic, which can be processed by casting, injection molding, extrusion, hot pressing and other molding processes. The products mainly include PMMA sheet, PMMA molding and PMMA film etc. PMMA not only has good comprehensive mechanical properties, excellent optical properties, weather resistance and aging resistance, good dielectric properties and insulation properties, but also relatively low price, light weight, good scratch resistance, and easy processing and molding. In particular, the photoelastic coefficient is extremely low, the surface gloss is high, and it has the highest full-spectrum light transmittance. The light transmittance is >92%, and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/12C08L69/00C08L25/16C08J5/18
CPCC08J5/18C08J2333/12C08J2333/20C08J2335/00C08J2425/16C08J2469/00
Inventor 胡树高西萍孙立民
Owner 聚纶材料科技(深圳)有限公司
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