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Antioxidant, composition and application thereof for film encapsulation

A thin-film encapsulation and antioxidant technology, which is applied in the field of thin-film encapsulated antioxidants and compositions, can solve the problems of decreased flatness of inorganic films, increased flatness, adverse effects on devices, etc., so as to reduce the emission of impurities and prolong the service life. , The effect of optimizing the water vapor transmission rate

Active Publication Date: 2022-05-06
JILIN OPTICAL & ELECTRONICS MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the currently used inorganic films are evaporated by plasma generation methods such as sputtering (sputtering) or vapor deposition (CVD). When there are many impurities in the organic film, the residual gases will be released, causing The flatness of the inorganic film decreases, resulting in an increase in the Water Vapor Transmission Rate (WVTR), which adversely affects the protected device

Method used

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  • Antioxidant, composition and application thereof for film encapsulation
  • Antioxidant, composition and application thereof for film encapsulation
  • Antioxidant, composition and application thereof for film encapsulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This antioxidant embodiment provides a kind of antioxidant for film encapsulation, and its synthetic route is as follows:

[0045]

[0046] Concrete, the preparation method of this antioxidant comprises the following steps:

[0047] Add 78 g of 3',5'-bis(2-aminoethyl)-3,5-di-tert-butyl-4-biphenol and 66 g of isocyanate methyl methacrylate to dissolve in 300 mL of toluene, and add 0.6 g Dibutyltin dilaurate was stirred while heating at 60° C. for 4 hours; then, the temperature was cooled to room temperature, and the solvent was removed using a vacuum distiller to obtain 106 g of an antioxidant. The structural formula of this antioxidant is as follows:

[0048]

[0049] This antioxidant is detected and analyzed, and the specific results are as follows:

[0050] HPLC purity: greater than 90%.

[0051] Mass spectrum: calculated value 650.82; found value 650.03.

[0052] Elemental analysis:

[0053] Calculated values: C: 66.44%; H: 7.74%; N: 8.61%; O: 17.21%.

[...

Embodiment 2

[0056] This antioxidant embodiment provides a kind of antioxidant for film encapsulation, and its synthetic route is as follows:

[0057]

[0058] Concrete, the preparation method of this antioxidant comprises the following steps:

[0059] Add 83 g of 3',5'-bis(2-aminoethyl)-3,5-di-tert-butyl-4-biphenol and 61 g of isocyanate methyl methacrylate to dissolve in 300 mL of toluene, and add 0.6 g Dibutyltin dilaurate was stirred while heating at 60° C. for 4 hours; then, the temperature was cooled to room temperature, and the solvent was removed using a vacuum distiller to obtain 106 g of an antioxidant. The structural formula of this antioxidant is as follows:

[0060]

[0061] This antioxidant is detected and analyzed, and the specific results are as follows:

[0062] HPLC purity: greater than 90%.

[0063] Mass Spectrum: Calculated 652.79; Tested 651.68.

[0064] Elemental analysis:

[0065] Calculated: C: 66.24%; H: 7.41%; N: 4.29%; O: 22.06%.

[0066] The test val...

Embodiment 3

[0078] This composition example provides a composition for film encapsulation, and its preparation method includes the following steps: 0.5g of the antioxidant provided in the above antioxidant example 1, 99g of 2-phenoxyethyl acrylic acid, 0.5 g of 2,2'-diethoxyacetophenone was put into the reactor and stirred for 30 minutes, and then filtered through a 0.45 μm Teflon filter to obtain a composition for film encapsulation.

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Abstract

The invention is applicable to the technical field of thin film encapsulation structure, and provides an antioxidant, a composition and an application thereof for thin film encapsulation. The general structural formula of the antioxidant is: In the formula, R 1 , R 2 , R 5 , R 6 is independently one of C1-C20 substituted or unsubstituted alkylene, C6-C30 substituted or unsubstituted arylene; R 3 , R 4 independently one of the same or different hydrogen, C1-C20 substituted or unsubstituted alkyl, C6-C30 substituted or unsubstituted aryl; X 1 , X 2 , X 3 , X 4 is independently one of O, S, substituted or unsubstituted NH. The antioxidant provided by the present invention has a plurality of propylene groups acting as photocuring groups, which can optimize the water vapor transmission rate of the encapsulation film and reduce the emission of impurities after film formation, thereby prolonging the encapsulation film structure of the organic light-emitting device. service life.

Description

technical field [0001] The invention belongs to the technical field of thin-film packaging structures, and in particular relates to an antioxidant for thin-film packaging, a composition and an application thereof. Background technique [0002] An organic light-emitting diode (OLED) display consists of a hole-injecting electrode (anode), an organic light-emitting layer, and an electron-injecting electrode (cathode). The organic light emitting device is generally attached on a substrate made of glass and covered by another substrate to prevent deterioration due to the influence of moisture or oxygen introduced from the outside. Currently, organic light emitting display devices are becoming thinner and thinner according to the demands of consumers. In organic light emitting display devices, in order to solve this problem, a thin film encapsulation (Thin Film Encapsulation, TFE) structure is adopted. [0003] The thin-film encapsulation structure is to alternately stack at leas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C275/24C07C271/20C07C273/18C07C269/02C09D4/02H01L51/52
CPCC07C275/24C07C271/20C07C273/1827C07C269/02C09D4/00H10K50/84
Inventor 姜晓晨于哲朴凤昊杜磊赵阔马晓宇王辉
Owner JILIN OPTICAL & ELECTRONICS MATERIALS