Preparation of low surface energy water-based acrylic pressure sensitive adhesive

(1) 75 g of βacryloyloxypropionic acid, 105 g of butanone, 1 .5 .0 g of dibutyl xanthate disulfide, 1 .0 g of azo diisobutyronitrile were added to the reactor, mixed, then evacuated at room temperature, ventilated with nitrogen, and reacted at 65°C for 60 h.

Triethylamine was added to neutralize the pH value of 8, then 25 g of hexafluorobutyl acrylate and 1 .0 g of azo diisobutyronitrile were added, ventilated with nitrogen, and reacted at 65°C for 48 h. 65°C for 48h, and then remove the butanone by vacuum at 60°C to obtain the fluorine-containing amphiphilic block oligomer.

(2) Weigh 8 g of the fluorinated amphiphilic block oligomer made in step (1), add it to 90 g of deionized water, and stir at room temperature to obtain an aqueous solution of emulsifier, then slowly add 270 g of isobornyl methacrylate, 12 g of octafluoropentyl methacrylate, 8 g of perfluorooctyl propyl acrylate, 7.5 g of N hydroxyethyl acrylamide, 6 g of n-amyl alcohol, 2.2 g of potassium persulfate, and stir for 30 min at a stirring speed of 500 rpm. Stirring for 30 min at 500 r/min to obtain a monomer pre-emulsion.

(3) Add 20 g of deionized water to the reaction kettle and heat to 80°C, add 20 .1 g of the monomer pre-emulsion made in step (2) and react for 20 min, then add the remaining monomer pre-emulsion dropwise to the reaction kettle within 4 h. After the dropwise addition, hold at 80°C for 1 h, cool down to 65°C, weigh 0 .8 g of disodium hydroxyethyl sulfite dissolved in 20 g of deionized water, and add dropwise to the reaction kettle within 30 min. Then add 3.5g of silicone wetting agent and 0.8g of silicone defoamer and stir for 30min, filter out the material to obtain low surface energy water-based acrylate pressure sensitive adhesive.