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Water-resistant and high-temperature-resistant hybrid acrylate-based flexible UV-curable adhesive and preparation method thereof

An acrylate and acrylate technology, used in polymer adhesive additives, non-polymer adhesive additives, adhesives, etc., can solve problems such as over 120 °C, and even occasionally exceed 140 °C, and achieve excellent flexibility. and strength, the effect of excellent adhesion

Active Publication Date: 2022-04-08
SHANDONG HIGHDEV NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, many small motors on electric tools are protected by injection molding for waterproof and dustproof, sacrificing a certain heat dissipation effect, so the local temperature can reach a very high level during operation, exceeding 120°C for a long time, and even occasionally Breaking through 140°C is a very high challenge for the current flexible acrylate UV-curable adhesive. At the same time, moisture-proof is also a relatively important requirement for motor protection, so there are also requirements for the moisture-proof performance of UV-curable adhesives.

Method used

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  • Water-resistant and high-temperature-resistant hybrid acrylate-based flexible UV-curable adhesive and preparation method thereof
  • Water-resistant and high-temperature-resistant hybrid acrylate-based flexible UV-curable adhesive and preparation method thereof
  • Water-resistant and high-temperature-resistant hybrid acrylate-based flexible UV-curable adhesive and preparation method thereof

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preparation example Construction

[0034] A method for preparing a water- and high-temperature-resistant mixed-type acrylate flexible UV-curable adhesive, comprising the following steps:

[0035] Step 1. Weighing 5%-10% low Tg reactive diluent, 15%-30% higher Tg flexible acrylic monomer or hybrid acrylic monomer and 2%-5% elastomeric acrylic block copolymer particles;

[0036] Step 2. Add the ingredients in step 1 into the blender, set the stirring speed at 600-800 rpm, control the temperature at 60-80°C, and stir for 2-3 hours to obtain a mixed liquid;

[0037] Step 3. After the mixed liquid obtained in step 2 is clarified and homogenized, the temperature is lowered to 30-40° C., and the mixer is replaced with nitrogen, and the subsequent steps are filled with nitrogen;

[0038] Step 4, then weigh 10% to 20% of self-made cationic radical mixed light-cured acrylate resin, weigh 2% to 10% of novolac epoxy acrylate oligomer, 30% to 50% of polyester Urethane acrylate or polyether polyurethane acrylate flexible ol...

Embodiment 1

[0044] Weigh raw materials according to the following parts by weight: based on 100 parts of the total raw materials, take 20 parts of acryloylmorpholine (ACMO), 8 parts of tetrahydrofuran acrylate (THFA), and 3 parts of Kurarity LA2330 copolymer, add them to the mixer, set stirring The rotation speed is 800 rpm, the temperature is controlled at 70°C, and the stirring time is 3 hours. After the mixed liquid is clarified and uniform, the temperature is lowered to 35°C, and the stirring tank is replaced with nitrogen. The subsequent steps are full of nitrogen, and the self-made cationic radicals are mixed. 15 parts of light-curing acrylic resin No. 1, 5 parts of Shin-A SEA236M50 novolac epoxy acrylate oligomer, 40 parts of Sartomer CN8888NS polyurethane acrylate oligomer, silane coupling agent 3-glycidyl ether oxypropyl Add 2.5 parts of radical trimethoxysilane into the mixer, set the stirring speed at 800 rpm, control the temperature at 35°C, and stir for 1 hour. Take 1841.5 par...

Embodiment 2

[0046] The raw materials were weighed according to the following parts by weight: based on 100 parts of the total raw materials, 22 parts of 2-vinyloxyethoxy ethyl acrylate (VEEA), 6 parts of tetrahydrofuran acrylate (THFA), 3 parts of Kurarity LA2250 copolymer, Add it into the mixer, set the stirring speed to 700 rpm, control the temperature at 80°C, and stir for 2.5 hours. After the mixed liquid is clear and uniform, cool down to 30°C, and replace the stirring tank with nitrogen. Take 12 parts of self-made cationic free radical mixed light-cured acrylic resin No. 1, take 7 parts of Shin-A SEA236M50 novolac epoxy acrylate oligomer, and 41 parts of Nippon Kayaku UFA-2301 polyether polyurethane acrylate oligomer , 2 parts of silane coupling agent 3-glycidyl etheroxypropyl trimethoxysilane, put into the mixer, set the stirring speed at 900 rpm, control the temperature at 30°C, stir for 1 hour, take free radical light 1.5 parts of initiator Omnirad 184, 1 part of free radical pho...

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Abstract

The invention relates to a water-resistant and high-temperature-resistant mixed-type acrylate flexible UV-curable adhesive and a preparation method thereof, which belong to the technical field of light-curable materials, and include self-made cationic free radicals with a composition and a weight percentage of 10% to 20%. Mix light-cured acrylate resin, 2%~10% novolac epoxy acrylate oligomer, 30%~50% polyester urethane acrylate or polyether urethane acrylate flexible oligomer, 5%~ 10% low Tg reactive diluent, 15%~30% higher Tg acrylic monomer, 2~5% elastomeric acrylic block copolymer, 1%~8% free radical photoinitiator, 1%~ 5% cationic photoinitiator, 1%~5% coupling agent and 1%~5% fumed silica have excellent adhesion to plastics, flexible colloid after curing, and at the same time achieve the effect of water resistance and high temperature resistance. It still has excellent flexibility and strength after high temperature aging and water immersion.

Description

technical field [0001] The invention relates to a water-resistant and high-temperature-resistant hybrid acrylate type flexible ultraviolet light curing adhesive and a preparation method thereof, which belong to the technical field of light curing materials. Background technique [0002] Photocurable materials have been widely used due to their fast curing speed, environmental friendliness, low energy consumption, no solvent volatilization and many other outstanding advantages, and have been rapidly promoted in all walks of life. At present, more and more plastic bonding applications require not only good adhesion, but also anti-impact and anti-drop requirements. This requires the use of UV-curable adhesives with strong flexibility and low hardness. With the advancement of technology , there have been many flexible resins in the market, not only polyether urethane acrylates that have advantages in flexibility, but many polyester urethane acrylates can also take into account f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/14C09J163/10C09J11/04C09J11/06C09J11/08
CPCC09J175/14C09J11/04C09J11/06C09J11/08C08L2201/08C08L2205/03C08K2201/014C08L63/10C08L53/00C08K5/5435C08K7/26
Inventor 程晓楠苟曲廷刘克增胡倩
Owner SHANDONG HIGHDEV NEW MATERIAL TECH CO LTD
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