High-carbon fatty acid terminated polyether ester defoaming agent for papermaking

Abstract

The invention provides a high-carbon fatty acid terminated polyether ester defoaming agent for papermaking, wherein the defoaming agent comprises the components in parts by weight: 50 to 75 parts of high-carbon fatty acid terminated polyether ester, 5 to 9 parts of high-carbon alcohol, 5 to 9 parts of high-carbon fatty acid ester, 1 to 10 parts of a surfactant, and 14 to 22 parts of a dispersing agent. The high-carbon fatty acid terminated polyether ester defoaming agent for papermaking has the characteristics of excellent defoaming foam-inhibiting performance in a high-temperature strong-alkali environment and low cost, cannot generate spots, and can improve the quality of paper.

Description

technical field

[0001] The invention relates to a defoamer, in particular to a high-carbon fatty acid-terminated polyether ester defoamer for papermaking. technical background

[0002] In the papermaking process, many additives with surface active functions (such as detergents, flow aids, wet strength agents, sizing agents, etc.) need to be used before pulping and papermaking, plus the pulp itself Lignin and resins also act as surfactants, making pulp easy to foam. At the same time, mechanical processes such as wire dehydration, pumping process, lip spraying, and paddle pool stirring will introduce a large amount of air, which is also the main cause of slurry foaming. Foam will cause many hazards: 1) increase the porosity of paper and affect paper quality; 2) increase pumping energy consumption, seriously affecting production efficiency; 3) waste of raw materials due to overflow; 4) easy to pollute the environment and endanger the health of workers. Therefore, defoamers ar...

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