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Colorless transparent polyimide film and preparation method thereof

A technology of transparent polyimide and polyimide film, applied in the direction of coating, etc., can solve the problem of high energy consumption, and achieve the effects of energy saving, good weather resistance, and excellent optical transparency

Active Publication Date: 2014-04-02
GUILIN ELECTRICAL EQUIP SCI RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The transparent films disclosed above all have good light transmittance, but in the process of preparation, thermal imidization treatment needs to be carried out at a relatively high temperature, and the energy consumption is relatively high.

Method used

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  • Colorless transparent polyimide film and preparation method thereof
  • Colorless transparent polyimide film and preparation method thereof
  • Colorless transparent polyimide film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In this embodiment, the colorless transparent polyimide film material has the following structural formula:

[0030]

[0031] The specific preparation method is:

[0032] 1) Add 10.0g (0.05mol) 4,4'-diaminodiphenylether (ODA) to 102.0g N-methylpyrrolidone in a three-necked flask, then add 3,3',4,4'- Diphenyl ether tetracarboxylic dianhydride (ODPA) (the molar ratio of ODA and ODPA is 1:1), stirred at 25°C for 5 hours to obtain a polyamic acid solution, and adjusted the solid content of the solution to 15%;

[0033] 2) Add triethylamine to the polyamic acid solution, the molar ratio of triethylamine to ODA is 2:1, and stir for 3 hours to obtain a polyamic acid salt solution;

[0034] 3) The polyamic acid salt solution is vacuum-debubbled, and the solution is coated on a clean glass plate by casting method, and the glass plate is placed in a drying oven with nitrogen protection, according to 60°C / 2h, 100°C / 2h, 120°C / 2h, 150°C / 2h process for thermal imidization; take...

Embodiment 2

[0042]In this embodiment, the colorless transparent polyimide film material has the following structural formula:

[0043]

[0044] The specific preparation method is:

[0045] 1) Add 10.0g (0.05mol) 4,4'-diaminodiphenylether (ODA) to dissolve in 80.0g N-methylpyrrolidone in a three-necked flask, then add 1,2,3,4-cyclobutyl Alkanetetracarboxylic dianhydride (CBDA) (the molar ratio of ODA to CBDA is 1.05:1), stirred at 30°C for 4 hours to obtain a polyamic acid solution, and the solid content of the solution was adjusted to 18%;

[0046] 2) Add triethylamine to solution A, the molar ratio of triethylamine to ODA is 0.5:1, and stir for 3 hours to obtain a polyamic acid salt solution;

[0047] 3) The polyamic acid salt solution is vacuum-debubbled, and the solution is coated on a clean glass plate by casting method, and the glass plate is placed in a drying oven with nitrogen protection, according to 60°C / 2h, 100°C / 2h, 120°C / 2h, 150°C / 2h process for thermal imidization; tak...

Embodiment 3

[0049] In this embodiment, the colorless transparent polyimide film material has the following structural formula:

[0050]

[0051] The specific preparation method is:

[0052] 1) Add 10.0g (0.05mol) 4,4'-diaminodiphenylether (ODA) to 100.0g N-methylpyrrolidone in a three-necked flask, then add hexafluoroisopropylidene dibenzene tetracarboxylate Anhydride (6FDA) (the molar ratio of ODA and 6FDA is 1.1:1), stirred at 20°C for 8 hours to obtain a polyamic acid solution, and adjusted the solid content of the solution to 20%;

[0053] 2) Add triethylamine to the polyamic acid solution, the molar ratio of triethylamine to ODA is 1:1, and stir for 3 hours to obtain a polyamic acid salt solution;

[0054] 3) The polyamic acid salt solution is vacuum-debubbled, and the solution is coated on a clean glass plate by casting method, and the glass plate is placed in a drying oven with nitrogen protection, according to 60°C / 2h, 100°C / 2h, 120°C / 2h, 150°C / 2h process for thermal imidiza...

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Abstract

The invention discloses a colorless transparent polyimide film and a preparation method of the colorless transparent polyimide film. The colorless transparent polyimide film is prepared according to the following preparation method: aromatic diamine and dianhydride monomer react in a polar aprotic solvent to obtain a polyamide acid solution, an organic alkali is added into the polyamide acid solution to obtain a polyamide acid saline solution, and then the polyamide acid saline solution forms the film to conduct thermal imidization to obtain the colorless transparent polyimide film. Due to the introduction of the organic alkali, on one aspect, the temperature of the thermal imidization is reduced to save energies and lower the production cost, on the other side, the obtained colorless transparent polyimide film has more excellent optical transparency, high thermal resistance and excellent weather fastness, the glass transition temperature is 200-300 DEG C, the ultraviolet absorption cutoff wavelength is 280-400nm, and the light transmittance is 80%-98% at the 450nm region.

Description

technical field [0001] The invention relates to the technical field of polyimide materials, in particular to a colorless and transparent polyimide film and a preparation method thereof. Background technique [0002] Polyimide is the most important product among aromatic heterocyclic polymers. It has excellent comprehensive properties such as high temperature resistance, high mechanical strength, chemical stability, and good dimensional stability. It has been widely used in aerospace, electrical, and microelectronics industries. application. [0003] In recent years, with the development of high-tech industries, optoelectronic devices have gradually shown a trend of large-scale, light-weight, ultra-thin and flexible. Traditional transparent substrate materials are usually glass and transparent polymer materials. The hard and brittle nature of glass makes it difficult to process and handle when it is large and thin, and it is difficult to bend freely, so it cannot meet the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10C08J5/18B29C41/00
Inventor 汪英李耀星钟威周福龙
Owner GUILIN ELECTRICAL EQUIP SCI RES INST
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