Preparation of low surface energy water-based acrylic pressure sensitive adhesive 2

(1), 85 g beta-acryloyl oxygen radicals propionic acid, 110 g butanone, 0. 6 g disulfide are two butyl xanthate ester, 1. 3 g azobisisobutyronitrile added to the reactor, mix again after vacuuming at room temperature, ventilation with nitrogen gas, reaction under 65 ℃ for 24 h, to join the three ethanol amine neutralization, and pH value of 8, after Then add 15g hexafluorobutyl acrylate, 1.7g azobisisobutyronitrile, through nitrogen, reaction at 65℃ for 72h, and then vacuum at 60℃ to remove butyl ketone, fluorine amphiphilic block oligomers were obtained.

(2) Weigh the 15g fluoro-containing amphiphilic block oligomers prepared in step (1), add them to 120g deionized water, and stir at a constant temperature to obtain an emulsifier aqueous solution. Then slowly add 190g ethyl acrylate, 55g methyl acrylate, 55g isobornyl methacrylate, 14g dodecfluoroheptyl methacrylate, 16g hexafluorobutyl acrylate, 1.5g ethyl methacrylate, 9g n-amyl alcohol, 0.9g ammonium persulfate, stirring for 20min, The monomer pre-emulsion was obtained at a stirring speed of 600r/min.

(3) Add 20g deionized water to the reactor and heat it to 80℃, add 71.46g monomer pre-emulsion prepared in step (2) and react for 20min, then drop the remaining monomer pre-emulsion into the reactor for reaction within 2h, and keep it warm at 80℃ for 1h after the drip, and then cool it to 65℃. Said take 0. 2 g hydroxy acetic acid and sulfonic acid disodium deionized water soluble in 10 g, and in the drops within 30 minutes added to the reaction kettle, 30 min insulation, cooling below 45 ℃ in BS-adjust pH value to 8, 168 and add into the organic silicon type of wetting agent, 6 g 0. 1 g organic silicon class defoaming agent mixing 30 min, filter the material, Low surface hydrophobic acrylic pressure sensitive adhesive is obtained.