Cation soap-free styrene-acrylate surface sizing agent and preparation method thereof

Abstract

The invention discloses a cation soap-free styrene-acrylate surface sizing agent and a preparation method thereof. The molecular structure of the cation soap-free styrene-acrylate surface sizing agent is shown in the specification. The preparation method of the cation soap-free styrene-acrylate surface sizing agent comprises the following step of carrying out soap-free emulsion polymerization by using 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 soap-free styrene-acrylate surface sizing agent. The obtain cation soap-free styrene-acrylate surface sizing agent has the characteristics of good combination with fibers, reduction of hair and powder slip, improvement of sizing degree, enhancement of surface strength, 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 soap-free styrene-acrylic surface sizing agent and a preparation method thereof. Background technique my country has now entered the ranks of the world's largest paper production and consumption countries, and hundreds of varieties of paper chemicals are needed in the paper production process. 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 phenomenon of lint and powder loss of paper sheets and improve the surface strength of paper, while effectively improving 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 ...

AI Technical Summary

Problems solved by technology

These factors have caused the decline in the strength and smoothness of the paper surface, resulting in powder and hair loss during the printing process.

On the other hand, with the continuous development of printing technology and equipment, the printing industry has higher and higher requirements for the surface strength, smoothness, and printability of paper. Decreased strength and smoothness, resulting in lint and powder falling during printing

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 loss, poor water resistance, and insufficient surface strength during the printing process limit the scope of application.

At present, styrene-acrylic emulsion is a copolymer prepared by emulsion polymerization of styrene and acrylate monomers. Small molecule emulsifiers are mostly used in the preparation process, which not only affects the water resistance and film-forming performance of light paper, but also pollutes the environment. Most of them are aqueous solution-based anionic polymers. During use, due to the presence of Al in water 3+ , Ca 2+ etc., will cause emulsion precipitation, which will have adverse effects on sizing

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