Styrene-acrylic emulsion surface sizing agent

Abstract

The invention relates to a styrene-acrylic emulsion surface sizing agent. The sizing agent comprises the following components in percent by mass: 20 to 40 percent of fixed styrene, 1 to 3 percent of crylic acid, 2 to 4 percent of a cross-linking monomer, 2 to 3 percent of an emulsifier, 0.5 to 1 percent of an initiator, 1 to 2 percent of a buffer agent, 1 to 2 percent of a neutralizing agent, 2.5 to 10 percent of oxidized starch, and 35 to 70 percent of water. The emulsifier is acrylamide isopropyl sodium sulfonate. The reaction-type emulsifier acrylamide isopropyl sodium sulfonate is adopted to substitute a traditional emulsifier, the reaction-type emulsifier can be bonded into a polymer in a form of a covalent bond to become part of the polymer while playing a role in emulsification, the migration of the emulsifier or the desorption of the emulsifier from polymer particles in film formation can be avoided, hydrophilic groups on the surface of a latex film can be greatly reduced, the polymer is relatively good in water resistance, and the water resistance and stability of the styrene-acrylic emulsion surface sizing agent can be improved.

Description

technical field [0001] The invention relates to the technical field of surface sizing agents, in particular to a styrene-acrylic emulsion surface sizing agent. Background technique [0002] Surface sizing is of great significance to the paper industry. Surface sizing can improve the quality and performance of paper to meet the continuous development requirements of the current papermaking, printing and other fields. Surface sizing agent products directly affect the effect of surface sizing. good or bad. Styrene-acrylic emulsion surface sizing agent has been rapidly developed in the paper industry due to its excellent performance. It can endow paper with many excellent properties. However, domestic research on styrene-acrylic emulsion surface sizing agent started late. The glue also has problems such as insufficient water resistance and insufficient stability, so it is very important to research and develop a styrene-acrylic emulsion surface sizing agent with good water resi...

AI Technical Summary

Problems solved by technology

Styrene-acrylic emulsion surface sizing agent has been rapidly developed in the paper industry due to its excellent performance. It can endow paper with many excellent properties. However, domestic research on styrene-acrylic emulsion surface sizing agent started late. The adhesive also has problems such as insufficient water resistance and insufficient stability. Therefore, it is very important to research and develop a styrene-acrylic emulsion surface sizing agent with good water resistance.

[0003] At present, domestic styrene-acrylic emulsions generally use traditional emulsifiers to synthesize emulsions. The emulsions synthesized by traditional emulsifiers have poor stability, and the residual emulsifiers will migrate or become rich during film formation. Membrane water resistance and stability