Emulsifier-free polymerization process of acrylic acid ester emulsion

摘要

PROBLEM TO BE SOLVED: To provide a polymerization method for an acrylic latex without emulsifier, having uniformly distributed particle diameters and excellent outward appearance of coating, and excellent in storage stability, permeability, a coating property, water resistance, tensile strength, and abrasion resistance.;SOLUTION: A reaction system is formed from 40-60 wt.% of pure water and 2-9 wt.% of a carboxylic acid monomer with a carbon-carbon double bond polymerizable functional group (A), and 40-50 wt.% of an alkyl methacrylate or an alkyl acrylate monomer (B), and 0.2-2.0 wt.% of an inorganic alkaline solution is first used to adjust the pH value of the reaction system to within a pH range of 9.0-13.0, then 0.2-1.0 wt.% of peroxide sulfate is used as initiators, and emulsification polymerization is carried out. At the end of the reaction, an organic amine compound is used to adjust the pH value of the obtained aqueous resin latex to within the pH range 7.0-9.5.;COPYRIGHT: (C)2012,JPO&INPIT