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Diacid anhydride compound, and preparation method and application thereof

A technology of compound and dianhydride, which is applied in the field of dianhydride compound and its preparation, can solve the problems of poor light transmittance, limit the development of PI film, affect the light transmittance of PI film, etc., achieve good optical properties and overcome the effect of deep color

Inactive Publication Date: 2019-11-29
BEIJING BAYI SPACE LCD MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The unique aromatic ring conjugated structure in the traditional polyimide structure leads to the formation of intramolecular and intermolecular charge transfer complexes (CTC), which greatly affects the light transmittance of PI films and presents a brownish yellow color. And poor light transmittance, which limits the development of PI thin films in the field of optoelectronics

Method used

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  • Diacid anhydride compound, and preparation method and application thereof
  • Diacid anhydride compound, and preparation method and application thereof
  • Diacid anhydride compound, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0118] Exhaust the reaction vessel with nitrogen in advance, add 126.53g N,N-dimethylacetamide (DMAc, remove water with molecular sieve 24h in advance) after 30min, and then add 10.01g (50mmol) 4,4'-diaminobis Phenyl ether (ODA) was loaded and dissolved in DMAc, stirred at 25°C until completely dissolved; then 21.62g (50mmol) dianhydride compound A1 was gradually added, stirred until completely dissolved, and kept for 24h to obtain 20wt% polyamide Amino acid solution.

[0119] After the reaction is over, add acetic anhydride and isoquinoline in equimolar amounts of carboxylic acid groups, add DMAc that has been dehydrated, and adjust to a solution of 15 to 18 wt%; the obtained polyimide acid solution is coated on a glass substrate After pre-drying, transfer to the needle plate, and then transfer to the oven, heat treatment at 150 ° C / 250 ° C / 300 ° C / 350 ° C for 30 minutes, and carry out thermal imidization, so as to obtain a polyester with a thickness of about 25 μm. im...

Embodiment 2

[0121] Exhaust the reaction vessel with nitrogen in advance, add 129.34g N,N-dimethylacetamide (DMAc, remove water with molecular sieve 24h in advance) after 30min, and then add 10.01g (50mmol) 4,4'-diaminobis Phenyl ether (ODA) was charged and dissolved in DMAc, stirred at 25°C until completely dissolved; then 22.32g (50mmol) of dianhydride compound A2 was gradually added, stirred until completely dissolved and then kept for 24 hours to obtain 20wt% polyimide Amino acid solution.

[0122] Then, in the same manner as in Example 1, a 25 μm thick polyimide film was prepared.

Embodiment 3

[0124] Exhaust the reaction vessel with nitrogen in advance, add 136.54g N,N-dimethylacetamide (DMAc, remove water with molecular sieve 24h in advance) after 30min, then add 10.01g (50mmol) 4,4'-diaminobis Phenyl ether (ODA) was loaded and dissolved in DMAc, stirred at 25°C until completely dissolved; then 24.12g (50mmol) of dianhydride compound B1 was gradually added, stirred until completely dissolved, and kept for 24h to obtain 20wt% polyamide Amino acid solution.

[0125] Then, in the same manner as in Example 1, a 25 μm thick polyimide film was prepared.

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Abstract

The invention specifically relates to a diacid anhydride compound and a preparation method and application thereof, belonging to the technical field of high polymer materials, especially the technicalfield of transparent polyimide films. The diacid anhydride compound of the invention has a specific alicyclic structure, and can be represented by any one of selected from a chemical formula A or a chemical formula B. A polyimide film prepared by polymerizing the diacid anhydride compound with diamine has a good optical characteristic that the light transmittance of light waves with wavelength of550 mm is greater than or equal to 85%, and overcomes the defect that a traditional aromatic polyimide film is dark in color; and the diacid anhydride compound can be applied in the field of transparent polyimide films and has good application prospects in the field of flexible display devices or photoelectricity. The preparation method provided by the invention is stable and efficient; raw materials are easy to obtain; and the preparation method is simple process and facilitates the promotion of the diacid anhydride compound.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to the technical field of transparent polyimide films. Specifically, it relates to a dianhydride compound and its preparation method and application. Background technique [0002] Polyimide (Polyimide, PI) refers to a class of high polymers containing imine rings in the main chain, which are prepared by gradual polymerization of compounds containing diamines and dianhydrides. Due to the unique imine ring, aromatic ring structure and its conjugation effect on the PI main chain, it has excellent thermal stability, mechanical strength, dielectric properties and low thermal expansion coefficient, so it is used in aerospace, microelectronics , mechanical engineering, petrochemical industry, liquid crystal display and other fields have been widely used. [0003] With the development of the optoelectronic field, on the basis of maintaining the original good thermal and mechanic...

Claims

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Application Information

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IPC IPC(8): C07D493/10C07D493/20C07D495/20C07D491/20C08G73/10C08J5/18C08L79/08
CPCC07D491/20C07D493/10C07D493/20C07D495/20C08G73/1039C08G73/1042C08G73/1071C08G73/1078C08J5/18C08J2379/08
Inventor 邓师勇姜坤戴雄张海威黄明义游维涛高立龙侯斌
Owner BEIJING BAYI SPACE LCD MATERIALS TECH
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