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Polyurethane organic-inorganic composite material as well as preparation method and application thereof

An inorganic composite material and polyurethane technology, which is used in polyurea/polyurethane coatings, semiconductor/solid-state device manufacturing, coatings, etc., can solve the problems of uneven optical properties of materials, unstable storage, and excessive refractive index differences. Achieve the effect of increasing the refractive index and improving the compatibility problem

Pending Publication Date: 2022-03-25
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a polyurethane organic-inorganic composite material with high refraction, excellent transparency and dispersibility and its preparation method and application. The problem of inhomogeneous optical properties of materials, alone or together with low refractive index materials with a refractive index lower than 1.5 to form an optical functional layer is used between the organic light-emitting layer (refractive index) and the cover plate, effectively solving the problem caused by the gap between the material layers of the display device. While the difference in refractive index is too large, it is impossible to achieve high-efficiency front light emission. At the same time, the light transmittance of the material can be improved, thereby significantly improving the light extraction efficiency of OLED displays, liquid crystals and other optical devices, and reducing the power consumption of OLED displays.

Method used

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  • Polyurethane organic-inorganic composite material as well as preparation method and application thereof
  • Polyurethane organic-inorganic composite material as well as preparation method and application thereof
  • Polyurethane organic-inorganic composite material as well as preparation method and application thereof

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preparation example Construction

[0075] In the specific embodiment, the preparation method of polyurethane organic-inorganic composite material of the present invention comprises the following steps:

[0076] After heating the polyurethane resin and the photoinitiator to 50-80°C respectively, they are put into the diluent, after being fully stirred, the inorganic particles are added, and the stirring is continued at room temperature for 1-2 hours to obtain the polyurethane-based organic-inorganic composite material.

[0077] Preferably, the above-mentioned inorganic particles are inorganic particles whose surface is hydrophobized through a silane coupling agent containing an alkenyl functional group.

[0078] Specific embodiments of the present invention The obtained polyurethane-based organic-inorganic composite material can be used as an optical functional layer in a display device; The organic-inorganic composite material is formed alone, or together with low-refractive-index materials whose refractive ind...

Embodiment 1

[0080] Add dry 1,6-hexanediol (23.6g, 0.2mol) and dry 5-chloro-2-methylphenylisocyanate (33.52g , 0.2mol) and dibutyltin dilaurate (0.12g, 2mmol), after mixing thoroughly, under a nitrogen atmosphere, slowly raise the temperature to 80°C for 2 hours, cool down to room temperature, install a water separator, and add dry methacrylic acid (17.2g, 0.2mol), dry p-toluenesulfonic acid (1.72g, 10mmol), p-hydroxyanisole (0.25g, 2mmol) and 50mL of toluene, heated to 115°C for reflux reaction. The boiled matter is moved to the water separator, and the liquid level in the water separator does not rise any more or the acid value of the reaction system is stable as the reaction end point, and the temperature is lowered to room temperature, and the remaining toluene, p-toluenesulfonic acid and p-hydroxybenzene are removed by suction filtration Methyl ether, the filtrate was dried with anhydrous magnesium sulfate, and purified by column chromatography to obtain the polyurethane resin shown i...

Embodiment 2

[0083] Add dry 3,6-dithia-1,8-octanediol (36.5 g, 0.2 mol) and dry isocyanic acid 2,5 -Dimethylphenyl ester (29.4g, 0.2mol) and dibutyltin dilaurate (0.12g, 2mmol), after mixing thoroughly, under nitrogen atmosphere, slowly raise the temperature to 80°C for 2h, cool down to room temperature, add additional Add dry acrylic acid (14.4g, 0.2mol), dry p-toluenesulfonic acid (1.72g, 10mmol), p-hydroxyanisole (0.25g, 2mmol) and 50mL toluene, heat up to 115°C to reflux reaction, During the process, the azeotrope of water and toluene is moved to the water separator, and the liquid level of the water in the water separator is no longer rising or the acid value of the reaction system is stable as the reaction end point, and the reaction is lowered to room temperature, and the remaining toluene, para Toluenesulfonic acid and p-hydroxyanisole, the filtrate is dried with anhydrous magnesium sulfate, and column chromatography purifies, obtains the polyurethane resin shown in 48g formula (1-...

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Abstract

The invention discloses a polyurethane organic-inorganic composite material which comprises the following components in parts by weight: 1-3 parts of polyurethane resin, 1-3 parts of inorganic particles, 1 part of a photoinitiator and 4-6 parts of a diluent, the preparation method comprises the following steps: respectively heating the polyurethane resin and the photoinitiator to 50-80 DEG C, putting into the diluent, fully stirring, adding the inorganic particles, and continuously stirring at normal temperature for 1-2 hours to obtain the polyurethane organic-inorganic composite material, the polyurethane organic-inorganic composite material is applied to a display device as an optical functional layer; the display device at least comprises a substrate, an organic light-emitting layer and a cover plate, and the optical function layer is independently formed by the polyurethane organic-inorganic composite material or jointly formed by the polyurethane organic-inorganic composite material and a low-refractive-index material with the refractive index smaller than 1.5.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a polyurethane organic-inorganic composite material and its preparation method and application. Background technique [0002] OLED stands for Organic Light Emitting Diode, also known as Organic Laser Display. OLED has the characteristic of self-illumination. It adopts a very thin organic material coating and glass substrate. When the current passes through, the organic material will emit light. Moreover, the OLED display screen has a large viewing angle and can significantly save power. Therefore, OLED is regarded as It is one of the most promising products of the 21st century. But so far, the internal quantum efficiency of OLED light-emitting devices can reach 100%. Due to the difference in refractive index between the electrode film and the glass substrate and the interface between the glass substrate and the air, the light emitted to the external space...

Claims

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Application Information

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IPC IPC(8): C09D175/16C09D7/62C09D7/61G02B1/00G02F1/1335G09F9/30H01L51/54
CPCC09D175/16C09D7/62C09D7/61G02B1/00G09F9/30G02F1/1335C08K2003/2244C08K3/2279C08K2003/2213H10K85/10C08K9/06C08K3/22
Inventor 邹菁江吉周王海涛项坤
Owner WUHAN INSTITUTE OF TECHNOLOGY
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