High-viscosity emulsion type pressure sensitive adhesive and preparation method thereof

The invention provides a high-viscosity emulsion type pressure sensitive adhesive. The high-viscosity emulsion type pressure sensitive adhesive is prepared by polymerizing the following components inparts by weight: 38 to 40 parts of water, 0.3 to 0.4 part of ammonium persulfate, 0.3 to 0.4 part of emulsifier, 50 to 55 parts of acrylate monomer mixed materials and double-bond-polymerizable tackifying resin, wherein the double-bond-polymerizable tackifying resin is prepared from 1 to 6 parts of polymerized rosin resin and 1 to 6 parts of terpene-phenolic resin. Meanwhile, the invention provides a preparation method of the high-viscosity emulsion type pressure sensitive adhesive. The preparation method comprises the following steps: adding 14 parts of the water and 0.4 part of the emulsifier into an emulsification tank, opening a stirrer for stirring, and adding quantitative acrylate monomer mixed materials required by a formula for sufficient emulsifying to form pre-emulsion; adding the water, heating to 80 to