High-efficiency benzene acrylic antibacterial multipolymer emulsion type surface sizing agent and preparation method thereof

The invention discloses a high-efficiency benzene acrylic antibacterial multipolymer emulsion type surface sizing agent and a preparation method thereof, belonging to the technical field of antibacterial paper surface treatment agent. The surface sizing agent is prepared by performing free radical emulsion polymerization on the following components in parts by weight by using a pre-emulsification-half-continuous combined feeding process: 0.4-8 parts of a dispersing agent, 0.1-5 parts of an emulsion agent, 0.1-2 parts of an initiator, 0.4-5 parts of a cross-linking monomer, 0.4-12 parts of a (methyl) acrylic ester monomer and 4-28 parts of (methyl) styrene. As the surface sizing agent is applied to the surface of paper, the ring crush compression resistance of paper is greatly improved, the Cobb value is remarkably increased, the remoistening phenomenon is avoided, the sized paper is excellent in antibacterial and anti-mold property, and the surface sizing agent is an environment-friendly product.