Emulsified high-alcohol degasifying agent for papermaking

Abstract

The invention discloses an emulsified high-alcohol degasifying agent for papermaking. Based on the totally 100-percent weight of the components, the agent comprises the following components in percentage by weight: (1) 30 to 59 percent of degasifying active substance, (2) 0.01 to 5 percent of non-cationic surfactant and (3) 40 to 69 percent of water, wherein the degasifying active substance comprises the following components in percentage by weight: (A) 20 to 40 percent of high alcohols, (B) 40 to 20 percent of fatty acid ester, (C) 40 to 20 percent of low melting grease, (D) 0.05 to 0.25 percent of polysaccharide compound and (E) 0.01 to 0.1 percent of water-soluble styrene-maleamic acid copolymer which are added into 100 percent in percentage by weight. The emulsified high-alcohol degasifying agent for the papermaking has the advantages of good storage stability, good high-temperature degasifying property, moderate preparation condition and the like, and can be widely applied to a papermaking process in the papermaking industry and other industries to achieve highly-efficient degasifying and deforming effect.

Description

technical field [0001] The invention relates to a defoamer, in particular to an emulsified high-carbon alcohol degasser for papermaking. Background technique [0002] my country is a big country in the paper industry, and its annual paper production ranks second in the world. The paper industry usually includes main processes such as pulping, papermaking and coating. Since the cooking agents, detergents, retention aids, filter aids, wet strength agents, sizing machines and other additives used before pulping and papermaking have surface active effects, it is easy to produce a large amount of water that is difficult to eliminate. At the same time, various plant fibers contained in pulping raw materials contain more hydroxyl groups, which can easily cause the surface and interior of the fibers to absorb a large number of tiny bubbles that are difficult to eliminate with ordinary defoamers, seriously affecting subsequent processes And product quality, so the use of degassing ...

AI Technical Summary

Problems solved by technology

[0004] Since the emulsion is a thermodynamically unstable system, the above-mentioned emulsified high-carbon alcohol degassing agent is prone to phase separation after long-term storage, resulting in further thickening or gelation, which affects the use

In addition, the degassing ability of the above-mentioned emulsified high-carbon alcohol degassing agent tends to show a downward trend with the increase of temperature, so when the papermaking is carried out at a higher temperature, the addition amount is large, which affects the subsequent process on the one hand, and on the other hand also increased cost

At the same time, due to the application of some high-melting point compounds, the emulsified high-carbon alcohol degassing agent often needs to be emulsified at a high temperature at 90-100 ° C, which makes the preparation process more difficult

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