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Urethane acrylate with NCO reactive group and UV (ultraviolet) moisture curing adhesive with resin

A polyurethane acrylate and reactive group technology, applied in polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of low bonding strength, insufficient initial adhesion and adhesion, and curing depth Shallow and other issues

Active Publication Date: 2022-03-04
深圳市库泰克电子材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of the existing UV moisture double-curing adhesives such as shallow curing depth, insufficient initial adhesion and adhesive force, low adhesive strength after lamination, and inconvenient use, the present invention provides a UV light adhesive that can replace double-sided adhesive tape. Moisture Curing Adhesives

Method used

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  • Urethane acrylate with NCO reactive group and UV (ultraviolet) moisture curing adhesive with resin
  • Urethane acrylate with NCO reactive group and UV (ultraviolet) moisture curing adhesive with resin
  • Urethane acrylate with NCO reactive group and UV (ultraviolet) moisture curing adhesive with resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Step 1. Mix 300 parts of tackifying resin and 400 parts of active monomer into the reaction kettle, heat to a certain temperature and mix evenly, vacuumize and stir until clarified.

[0040] Step 2. After cooling down to room temperature, add 200 parts of urethane acrylate with NCO reactive groups into the reactor, vacuumize for a period of time, add 50 parts of photoinitiator and stir until uniform.

[0041] Step 3. Dry 20 parts of thixotropic agent in an oven at 120°C for 2-3 hours and add to the reaction kettle. Finally, add 20 parts of carbon black, 10 parts of defoamer, 10 parts of leveling agent, dibutyltin dilaurate (DBTL) 0.5 parts, 10 parts of oxazolidine water-removing agents, vacuum-stirred, and discharged under vacuum conditions to obtain the pressure-sensitive UV / moisture-curable adhesive of the present invention.

Embodiment 2

[0043] The preparation steps and conditions are the same as in Example 1. Just reduce the tackifying resin to 200 parts, increase the urethane acrylate with NCO reactive group to 300 parts, and use the same amount of other raw materials to obtain the pressure-sensitive UV / moisture-cured product of the present invention. adhesive.

Embodiment 3

[0045] The preparation steps and conditions are the same as in Example 1. Just reduce the active monomer to 300 parts, reduce the tackifying resin to 200 parts, increase the urethane acrylate with NCO reactive group to 300 parts, and keep other conditions unchanged, to obtain the pressure-sensitive adhesive of the present invention. Non-toxic UV / moisture curing adhesive.

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Abstract

The invention discloses polyurethane acrylate with an NCO reactive group and a UV (ultraviolet) moisture curing adhesive with the resin. The UV moisture curing adhesive is prepared from the following raw materials in parts by mass: 10 to 50 parts of polyurethane acrylate with an NCO reactive group, 10 to 50 parts of an active monomer, 20 to 40 parts of tackifying resin, 1 to 5 parts of a thixotropic agent, 1 to 5 parts of a photoinitiator, 0.01 to 0.1 part of a catalyst, 0.1 to 10 parts of an auxiliary agent, 0.5 to 2 parts of a stabilizer and 0.1 to 1 part of black pigment. According to the adhesive disclosed by the invention, specially prepared polyurethane acrylate with NCO reactive groups is adopted, and the adhesive is semi-cured after being irradiated by UV (Ultraviolet), but has relatively strong initial adhesion, and can be used for replacing a double-sided adhesive tape to be adhered to a lightproof base material OC (Open Carbon). And after bonding, the adhesive can continue moisture curing, so that the bonding strength is further improved, and the effect of enhancing the bonding effect of a base material is achieved. The adhesive disclosed by the invention can be used for an automatic dispensing process, can be completed in tens of seconds, and is simple and convenient to operate and higher in intellectualization.

Description

technical field [0001] The invention relates to the technical field of adhesive preparation, in particular to an ultraviolet light moisture-curing adhesive suitable for the middle frame assembly process of TV LCD screen packaging, which includes the polyurethane with NCO reactive groups provided by the invention Acrylate. Background technique [0002] At present, during the assembly process of the middle frame of the TV LCD screen package, the assembly of the display screen and the OC is usually bonded and fixed by adhesive tape or glue. First apply glue or paste double-sided tape with a certain adhesive strength on the middle frame base material, and then attach the OC to fix it, and at the same time have a light-shielding effect to reduce exposure errors. However, most of the adhesive tapes are imported at present, the cost is high and die-cutting is required before use, and manual operation is not suitable for the development trend. The most important thing is that the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/67C08G18/48C08G18/42C09J175/14C09J7/38
CPCC08G18/672C09J175/14C09J7/38C09J2301/302C08G18/48C08G18/42
Inventor 吴红林黄伟进
Owner 深圳市库泰克电子材料技术有限公司
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