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A kind of optical uv glue and its preparation method and application

An optical and photoinitiator technology, used in adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve the problem of poor high temperature resistance of OCA double-sided adhesives, decreased screen brightness and contrast, and screen display appearance. Highlights and other issues, to achieve the effect of good comfort, improved brightness of the whole screen, and improved safety performance

Active Publication Date: 2017-08-25
SUMDA MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] (1) OCA double-sided tape has poor high temperature resistance, and large screens will produce air bubbles during transportation or use, resulting in bright spots on the screen display, eventually leading to the scrapping of the entire screen;
[0004] (2) OCA double-sided tape will cause a decrease in screen brightness and contrast, affecting the visual effect of the screen;
[0005] (3) The water absorption of OCA double-sided adhesive is relatively strong. When used in the rainy season, the screen will be water-stained due to the appearance of air bubbles, resulting in a significant drop in display effect;
[0006] (4) Since most of the OCA double-sided adhesives currently in use are imported products, their prices are very high, resulting in high production costs
Therefore, how to solve the above-mentioned problems that the traditional optical glue produces bubbles and water stains in the high temperature and high humidity environment that have plagued the large screen industry for more than ten years, enhance the visual effect of the screen, prolong the service life of the screen, and reduce the production cost of large screen products, etc. has become one of the most important problems that need to be solved urgently

Method used

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  • A kind of optical uv glue and its preparation method and application

Examples

Experimental program
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preparation example Construction

[0056] Preparation of optical UV resin:

[0057] According to the formula shown in Table 1, add isocyanate, polymerization inhibitor and catalyst into the reaction vessel, add the elastic segment, control the reaction temperature at 50°C, and the reaction time is 4h. After the measured NCO% reaches the theoretical value of 3%-12%. , add rigid segment, react at 60°C for 3 hours, measure NCO% to 2%-8% of the theoretical value, then add hydroxyethyl acrylate, react at 50°C for 3 hours, detect NCO% is less than 1% material, to obtain optical UV resin;

[0058] Table 1 A 1 ~ A6, C1-C3 main body UV resin (parts by weight)

[0059] A1 A2 A3 A4 A5 A6 C1 C2 HDI 20 50 60 80 50 IPDI 40 70 40 MEHQ 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 Organic Bismuth Catalyst 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 Cyclohexanedimethanol and hexanehexanol modified polycarbonate diol 80 70 60 50 40 20 polypropylene glycol 8...

Embodiment 1-6 and comparative example 1-2

[0061]According to the formula shown in Table 2, add the photocurable monomer into the reactor, stir and add the photoinitiator at the same time, heat to 50 ° C, stir for 1 hour, then add the optical UV resin obtained above, continue to stir for 2 hours, and remove the air bubbles in vacuum , 400-mesh filter cloth, and centrifuged to obtain optical UV glue. Apply the obtained optical UV adhesive to the glass surface of the screen, and then cover the plastic surface of the screen. After light curing, the packaged large screen is obtained. The performances of the screen are tested, and the results are shown in Table 2.

[0062] Table 2 The composition and performance results of each component of the embodiment and the comparative example

[0063]

[0064] As can be seen from the results of the examples and comparative examples in Table 2, the present invention prepares the polycarbonate diol rigid segment and elastic segment by introducing cyclohexanedimethanol and hexanehexy...

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Abstract

The invention discloses an optical UV glue and a preparation method and application thereof. The optical UV glue contains 30-50 parts of optical UV resin, 45-70 parts of a photocuring monomer and 2-13 parts of photoinitiator, wherein the optical UV resin contains 20-80 parts of isocyanate, 20-80 parts of elastic chain segments, 20-80 parts of rigid chain segments, 10-35 parts of hydroxyethyl acrylate, 0.02-0.5 part of a catalyst and 0.02-0.5 part of a polymerization inhibitor. The optical UV glue has very good high temperature and low temperature resistance performance and enables a screen not to produce bubbles, water spots and other problems under the situations of high temperature, low temperature, high humidity and the like, and the problems of traditional optical OCA glues harassing the large screen industry for more than ten years is solved. The visual effect of the screen is enhanced, and the display brightness, definition and visual angle of the screen are greatly improved. The safety performance of the screen is greatly improved compared with existing OCA glue using screens. The production cost of large screen products is remarkably reduced.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to an optical UV glue used for a large-size screen of a video wall and a preparation method thereof. Background technique [0002] At present, in the follow-up processing process of the large-screen industry, imported OCA double-sided adhesive is used for packaging. OCA double-sided adhesive is made of optical acrylic adhesive without substrate, and then laminated on the upper and lower bottom layers. A layer of release film is a double-sided adhesive tape without a matrix material. It has the following defects: [0003] (1) OCA double-sided tape has poor high temperature resistance, and large screens will produce air bubbles during transportation or use, resulting in bright spots on the screen display, eventually leading to the scrapping of the entire screen; [0004] (2) OCA double-sided tape will cause a decrease in screen brightness and contrast, affecting the visual...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/14C08G18/67C08G18/48C08G18/42C08G18/44
CPCC08G18/4018C08G18/4277C08G18/44C08G18/48C08G18/672C09J175/14C08G18/40C08G18/42
Inventor 赵东理
Owner SUMDA MATERIAL TECH CO LTD