Aqueous acrylate pressure sensitive adhesive modified by reactive emulsifier

The main role of traditional emulsifiers is to provide emulsifying sites and take up. To solubilizing effect. Because this kind of emulsifier does not participate in the polymerization reaction of emulsion, it only exists on the polymer surface in the way of adsorption and remains in PSA. Therefore, during film forming, this kind of emulsifier is easy to migrate and aggregate and easy to form a channel for water invasion, which significantly reduces the water resistance of the film. The molecular structure of reactive emulsifiers contains reactive functional groups (such as double bonds, carboxyl groups, hydroxyl groups, and sulfonic acid groups), which can directly participate in copolymerization. Therefore, this kind of emulsifier can be polymerized to the latex particles in the form of chemical bonds, which effectively avoids the migration of emulsifiers and improves the water resistance and other properties of PSA.