Cation styrene-acrylic surface sizing agent and preparation method thereof

Abstract

The invention discloses a cation styrene-acrylic surface sizing agent and a preparation method thereof. The molecular structure of the cation styrene-acrylic surface sizing agent is shown in the specification. The preparation method of the cation styrene-acrylic surface sizing agent comprises the following step of carrying out polymerization by using polyvinyl alcohol 1799 as a dispersing agent, using ammonium persulfate as an initiator and using phenylethylene, methyl methacrylate, ethyl acrylate, allyl alcohol and methacrylatoethyl trimethyl ammonium chloride as mixing monomers to prepare the cation styrene-acrylic surface sizing agent. The obtained cation styrene-acrylic surface sizing agent has the characteristics of good combination with fibers, reduction of hair and powder slip, improvement of sizing degree, high surface strength, good ink adsorption, adaptation to high-speed printing and the like.

Description

technical field The invention relates to the field of preparation of light-duty paper surface sizing agents, in particular to a cationic styrene-acrylic surface sizing agent and a preparation method thereof. Background technique In modern papermaking technology, surface sizing has become the main form of paper surface sizing treatment. Surface sizing agents with excellent performance can reduce the lint and powder loss of paper sheets and improve the surface strength of paper. The folding endurance, water resistance, tensile strength, stiffness and smoothness of the paper can reduce the air permeability, improve the printing performance, etc., and significantly improve the quality grade and use value of the paper. Lightweight paper is a kind of light offset paper. It has a unique production and processing technology, does not contain fluorescent whitening agents, and is favored by people for its light weight of paper fibers, bulky texture, smooth surface, and soft color. Du...

AI Technical Summary

Problems solved by technology

The traditional surface sizing agents for light paper include starch, oxidized starch, phosphate starch, polyacrylamide modified starch and polyvinyl alcohol, etc., which have poor affinity with fibers during use, and are prone to film formation and breakage. The shortcomings of hair loss, powder falling, poor water resistance, and insufficient surface strength during the printing process limit the scope of application. At present, styrene-acrylic emulsion is prepared by emulsion polymerization of styrene and acrylate monomers. Copolymers, the preparation process often uses small molecule emulsifiers, which not only affect the water resistance and film-forming properties of light paper, but also cause environmental pollution, and most of them are aqueous solution-based anionic polymers. During use, the water contains Al 3+ , Ca 2+ etc., will cause emulsion precipitation, which will have adverse effects on sizing

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