Environment-friendly high-strength ultraviolet-cured acrylate pressure-sensitive adhesive and preparation method thereof

[0015] Specific embodiment 1: This embodiment is an environmentally friendly high-strength UV-curable acrylate pressure-sensitive adhesive based on the weight of 30 parts to 70 parts of nano-modified polyurethane acrylate oligomer, 30 parts to 70 parts of active It is prepared from diluent, 1 part to 3 parts adhesion promoter and 0.2 part to 5 parts photoinitiator.

[0016] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the nano-modified polyurethane acrylate oligomer is prepared according to the following steps:

[0017] Add 0.1 mol of the glycol dehydrated under vacuum to a four-necked flask equipped with a stirrer, thermometer and dropping funnel. After heating to 60℃~80℃, add 0.05%~0.3% of the total weight of the glycol under stirring conditions. Then add 0.12mol~0.2mol diisocyanate monomer dropwise, then react at 60℃~80℃ for 3h~6h, then add 1%~10% of the total mass of diol with inorganic nanometer containing hydroxyl The ethyl acetate solution of the particles is reacted at 60℃~80℃ for 0.5h~2h, then 0.1mol~0.2mol of hydroxyl-containing acrylate monomer is added, and then reacted at 60℃~80℃ for 1h~1.5h Then, the ethyl acetate in the system is distilled off under reduced pressure at 40°C-50°C to obtain nano-modified polyurethane acrylate oligomer. The other steps are the same as the first embodiment.

[0018] Specific embodiment three: this embodiment is different from specific embodiment one or two in that: the diol is polypropylene glycol PPG-600, polypropylene glycol PPG-1000, polypropylene glycol PPG-1500, polypropylene glycol PPG- 2000. One or a mixture of polypropylene glycol PPG-3000 and polypropylene glycol PPG-4000; the organotin catalyst is dibutyltin dilaurate, stannous octoate, and bis(dodecylthio) Dibutyltin or dibutyltin diacetate; the diisocyanate monomers are toluene diisocyanate, 1,6-hexamethylene diisocyanate, isophorone diisocyanate, 4,4-diisocyanate dicyclohexylmethane and diphenylmethane di One or a mixture of isocyanates. The other steps are the same as the first or second embodiment.