Ultraviolet-cured adhesive, preparation method therefor and application of ultraviolet-cured adhesive

A technology of curing glue and ultraviolet light, which is applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., which can solve the problems of poor weather resistance, inability to take into account toughness, adhesion, temperature resistance and moisture resistance, Insufficient adhesion and other problems, to achieve the effect of temperature resistance balance, moisture resistance balance, high production efficiency

Active Publication Date: 2018-04-20
GUANGZHOU MECHANICAL ENG RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adhesive has excellent toughness and temperature resistance, but insufficient adhesion
[0009] Li Yinglin and others from Guangzhou Huitian Fine Chemical Co., Ltd. used isophorone diisocyanate IPDI, modified polyether polyol, and hydroxyethyl methacrylate (HEMA) as the main raw materials to prepare polyurethane acrylate for a A high-performance UV-curable adhesive with excellent bonding strength but poor weather resistance (“Preparation of a high-performance UV-curable adhesive”, Bonding, Issue 09, 2014)
At present, the main problem of UV glue is that it cannot take into account toughness, adhesion, temperature resistance and moisture resistance.

Method used

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  • Ultraviolet-cured adhesive, preparation method therefor and application of ultraviolet-cured adhesive
  • Ultraviolet-cured adhesive, preparation method therefor and application of ultraviolet-cured adhesive

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0041] In a 500 ml glass four-necked flask equipped with a stirrer, a thermometer and a condenser tube, add 93 grams of VORANOL 2070 (Dow Chemical, average molecular weight 700, functionality 3, medium molecular weight triol), 2,2-dihydroxy 375 grams of methylpropionic acid, 0.47 grams of p-toluenesulfonic acid, the temperature of the kettle was raised to 142 ° C for 2 hours with stirring, and then the reaction was carried out under reduced pressure distillation until the acid value was below 9 mg / g KOH, and the terminal was obtained after cooling and purification. Hydroxyl hyperbranched polyether polyester A1.

[0042] In a 500 ml clean and dry glass four-necked flask equipped with a stirrer, a thermometer and a condenser tube, add 140 g of toluene-2,4-diisocyanate, 104 g of hydroxypropyl acrylate, 0.25 g of hydroquinone and 0.3 gram of dibutyltin dilaurate, 125 milliliters of acetone, measure the initial NCO value, react at room temperature for 3 hours, heat up to 48°C to co...

Synthetic example 2

[0044] In a 500 ml glass four-neck flask equipped with a stirrer, a thermometer and a condenser tube, add 200 grams of VORANOL 2120 (Dow Chemical, average molecular weight 2000, functionality 2, polypropylene glycol), 2,2-dimethylol 187.5 grams of propionic acid, 0.39 grams of p-toluenesulfonic acid, the temperature of the kettle was raised to 145 ° C for 2.5 hours under stirring, and then the reaction was carried out under reduced pressure distillation until the acid value was below 9 mg / g KOH. Polyether polyester A2.

[0045] In a 500 ml clean and dry glass four-neck flask equipped with a stirrer, a thermometer and a condenser tube, add 140 grams of toluene-2,4-diisocyanate, 92.8 grams of hydroxyethyl acrylate, 0.3 grams of p-hydroxyanisole and 0.3 g of dibutyltin dilaurate, 150 ml of acetone, measure the initial NCO value, react at room temperature for 2 hours, then raise the temperature to 55°C to continue the reaction, stop when the NCO value is half of the initial value,...

Synthetic example 3

[0047] In a 500 ml glass four-neck flask equipped with a stirrer, a thermometer and a condenser tube, add 200 grams of VORANOL 222-056 (Dow Chemical, average molecular weight 2000, functionality: 2, polyethylene glycol), 2,2- 187.5 grams of dimethylolpropionic acid, 0.39 grams of p-toluenesulfonic acid, the temperature of the kettle was raised to 135 ° C for 3 hours under stirring, and then the reaction was carried out under reduced pressure distillation until the acid value was below 9 mg / g KOH, after cooling and purification The hydroxyl-terminated hyperbranched polyether polyester A3 was obtained.

[0048] In a 500 ml clean and dry glass four-necked flask equipped with a stirrer, a thermometer and a condenser tube, add 140 g of toluene-2,4-diisocyanate, 104 g of hydroxypropyl acrylate, 0.25 g of hydroquinone and 0.25 gram of dibutyltin dilaurate, 150 milliliters of acetone, measure the initial NCO value, react at room temperature for 4 hours, heat up to 45°C to continue the...

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Abstract

The invention belongs to the technical field of adhering of electronic material structures and discloses a preparation method for an ultraviolet-cured adhesive and an application of the ultraviolet-cured adhesive. The ultraviolet-cured adhesive is prepared from the following ingredients in percentage by weight: 50% to 90% of polyether-based hyperbranched polyurethane acrylate, 5% to 35% of acrylate reactive diluent, 1% to 8% of photoinitiator, 1% to 15% of thixotropic powder and 1% to 10% of auxiliaries. According to the ultraviolet-cured adhesive disclosed by the invention, ultraviolet is adopted to initiate chain polymerization, the curing time is short and is generally 5 to 15 seconds, and the production efficiency is high; and the ultraviolet-cured adhesive is applicable to adhering fixation of lenses on LED (Light Emitting Diode) lamp bars and can simultaneously give attention to the balance of toughness, adhering power, temperature resistance and moisture resistance.

Description

technical field [0001] The invention belongs to the technical field of electronic material structure bonding, and in particular relates to a preparation method and application of an ultraviolet curing adhesive. Background technique [0002] Due to the advantages of energy saving, small size, and low cost, LED TV has become the mainstream TV in the current market. The key core product of LED TV is light Bar, that is, LED light bar. It is a long aluminum substrate with LED lights welded Then cover the PC lens on the LED lamp to make the LED light evenly distributed. The PC lens is fixed on the glass fiber substrate or aluminum substrate through three pins. [0003] At present, the PC lens of LED TV is generally bonded with one-component epoxy adhesive. The main disadvantage is that it needs to be stored at a low temperature of about -20°C, which is inconvenient for storage and transportation. The curing time takes 3-5 minutes, and the production efficiency is low. It needs to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/14C08G18/48C08G18/67
CPCC08G18/4825C08G18/4829C08G18/4833C08G18/6725C09J175/14
Inventor 刘海涛
Owner GUANGZHOU MECHANICAL ENG RES INST
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