A kind of photocurable composition for brightening film

A technology of composition and brightening film, which is applied in the field of optical film, can solve the problems of high operating cost and demanding conditions, difficulty in controlling the uniformity of the inorganic layer, and is limited to about 1.6, so as to achieve high light source utilization rate, shorten curing time, The effect of improving flexibility

Active Publication Date: 2021-07-30
SHANDONG EFIRM BIOCHEMISTRY & ENVIRONMENTAL PROTECTION CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Under normal circumstances, increasing the brightness gain of the brightness enhancement film mainly depends on increasing the refractive index of the light-curing material. However, the current light-curing material is mainly dense benzene organic matter. With the increase of benzene rings, the material will become solid, and the refractive index is basically limited to around 1.6
In the prior art, the application of inorganic oxides, such as titanium dioxide, zirconium dioxide, chromium dioxide, indium tin oxide, etc., can increase the refractive index to between 2.1 and 2.5, but this method mainly uses magnetron sputtering to form a refractive index. layer, the operating cost and requirements are quite harsh, and the uniformity of the inorganic layer is difficult to control
At present, another material that can provide a high refractive index is a sulfur-containing organic material, whose refractive index can reach more than 1.7, but it faces the problem of yellowing of the material

Method used

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  • A kind of photocurable composition for brightening film
  • A kind of photocurable composition for brightening film
  • A kind of photocurable composition for brightening film

Examples

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preparation example Construction

[0038] In the present invention, the preparation method of the polythiol compound preferably includes the following steps:

[0039] (1) Heat the polythiol monomer to 50-80°C, add a photoinitiator, cool the resulting mixture to room temperature, add allicin to the cooled mixture for photocuring modification, and obtain a modified polythiol monomer body;

[0040] (2) reacting the modified polythiol monomer in the step (1) with sulfur to obtain a polythiol compound.

[0041] In the present invention, the polythiol monomer is preferably heated to 50-80°C, a photoinitiator is added, the obtained mixture is cooled to room temperature, and allicin is added to the cooled mixture for photocuring modification to obtain the modified polythiol monomer body. In the present invention, the polythiol monomer preferably includes 4-mercaptomethyl-1,8-dimercapto-3,6-dithiooctane, 2,3-di(2-mercaptoethylthio )-3-propane-1-thiol, tetrakis(mercaptomethyl)methane, bis(2-(2-mercaptoethylthio)-3-mer...

Embodiment 1

[0063] Weigh 146.4g of pentaerythritol tetrakis (3-mercaptopropionic acid) ester monomer, heat 80°C in a water bath, then add 0.293g (2‰) photoinitiator diphenyl-(2,4,6-trimethylbenzyl Acyl)phosphine (TPO), mix well and dissolve completely, add 12.15g of allicin after cooling to room temperature, and irradiate with ultraviolet light for a certain period of time to obtain trithiopropenyl pentaerythritol tetrakis (3-mercaptopropionic acid) ester mono body.

[0064] Weigh 195g trithiopropenyl pentaerythritol tetrakis(3-mercaptopropionate) monomer, heat it to 90°C in an oil bath, add 4.8g sulfur solid in 3 batches, react for 3h, and obtain the target polythiol compound after cooling. Trithiopropenyl pentaerythritol tetrakis(3-mercaptopropionate) sulfide.

[0065] Preparation of anti-yellowing agent HN-AOIVM3: Weigh 12.5g of AOI-VM monomer, heat in oil bath to 80°C, then add 14.4g of HN130 in 5 batches and mix evenly, react for 2h, stop the reaction, cool to room temperature Avai...

Embodiment 2

[0069] Weigh 146.4g of pentaerythritol tetrakis (3-mercaptopropionic acid) ester monomer, heat in a water bath at 50°C, then add 0.293g (2‰) photoinitiator TPO, mix evenly and dissolve completely, add 12.15g of garlic after cooling to room temperature The element can be irradiated with ultraviolet light for a certain period of time to obtain trithiopropenyl pentaerythritol tetrakis (3-mercaptopropionate) monomer.

[0070] Weigh 195g trithiopropenyl pentaerythritol tetrakis(3-mercaptopropionate) monomer, heat it in an oil bath to 90°C, add 4.8g sulfur solid in 5 batches, react for 3h, and obtain the target polythiol compound after cooling. Trithiopropenyl pentaerythritol tetrakis(3-mercaptopropionate) sulfide.

[0071] Preparation of anti-yellowing agent HN-AOIVM3: Weigh 12.5g of AOI-VM monomer, heat it in an oil bath to 80-100°C, then add 14.4g of HN130 in 5 batches and mix well, react for 2 hours, stop the reaction, and cool to The liquid anti-yellowing agent HN-AOIVM3 can b...

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Abstract

The invention provides a photocurable composition for a brightness enhancing film, which belongs to the technical field of optical films. The photocurable composition for brightness enhancing film includes the following components in parts by weight: 10-50 parts of acrylic resin, 10-100 parts of polythiol compound, 10-50 parts of photocurable monomer, 1-25 parts of photoinitiator parts, additives 0-15 parts and anti-yellowing agent 0.2-10 parts. The light-curing composition for brightness enhancing film provided by the invention has a maximum refractive index of 1.74, has anti-yellowing effect, fast curing speed, and a solid content of up to 100%.

Description

technical field [0001] The invention belongs to the technical field of optical films, and in particular relates to a photocurable composition for brightness enhancement films. Background technique [0002] Brightness enhancement films are widely used in backlight modules to concentrate the light emitted by the light source. The high-refractive-index brightness-enhancing film utilizes the special prism structure on its surface to gather light multiple times, which can effectively increase the brightness of the visible light of the display and consume less energy when producing the required brightness. Its primary application is in electronics to increase the brightness of backlit flat panel displays, including displays for electroluminescent panels, word processors, televisions, and video cameras. [0003] The surface of the brightness-enhancing film has a series of regular prism-structure concave-convex patterns, which convert side light into front light and collect reflect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D181/02C09D163/10C09D175/14C09D4/02C09D4/06C09D171/02C09D7/48C08G75/04
CPCC08G75/04C09D4/06C09D163/10C09D175/14C09D181/02C09D7/48C08L63/10C08K5/132C08K5/20C08L81/02
Inventor 邢莹莹张建林曹飞羽侯小敏刘洋孔凡波
Owner SHANDONG EFIRM BIOCHEMISTRY & ENVIRONMENTAL PROTECTION CO LTD
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