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High-carbon fatty acid-terminated polyether ester defoamer for papermaking

A technology of high-carbon fatty acid ester and high-carbon fatty acid, applied in defoamer and other directions, can solve the problems of inability to effectively eliminate foam, low foam breaking rate, etc., and achieve excellent defoaming and foam suppression performance, low cost and simple process Effect

Active Publication Date: 2016-05-18
JIANGSU SAIOUXINYUE DEFOAMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patents CN102162206A and CN101638868A respectively provide a kind of defoamer for papermaking with polyether as the main body and different ingredients. lots of foam

Method used

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  • High-carbon fatty acid-terminated polyether ester defoamer for papermaking
  • High-carbon fatty acid-terminated polyether ester defoamer for papermaking

Examples

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Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: 100 parts by weight of propylene oxide, 5 parts by weight of itaconic anhydride, 5 parts by weight of carbon dioxide, and 1 part by weight of ethylene glycol take DMC as a catalyst at 60 o C copolymerization obtains polyether ester, continues to add 20 parts by weight of dodecanoic acid at 120 o C undergoes an esterification reaction and vacuum devolatilization to obtain a high-carbon fatty acid-terminated polyether ester A.

Embodiment 2

[0020] Embodiment 2: 80 parts by weight of propylene oxide, 20 parts by weight of ethylene oxide, 5 parts by weight of itaconic anhydride, 5 parts by weight of carbon dioxide, 1 part by weight of ethylene glycol with DMC as a catalyst at 60 o C copolymerization obtains polyether ester, continues to add 10 parts by weight of dodecanoic acid at 120 o C undergoes an esterification reaction and vacuum devolatilization to obtain a high-carbon fatty acid-terminated polyether ester B.

Embodiment 3

[0021] Embodiment 3: 100 parts by weight of propylene oxide, 0.1 parts by weight of maleic anhydride, 0.1 parts by weight of ethylene glycol take KOH as a catalyst at 50 o C copolymerization obtains polyether ester, continues to add 10 parts by weight methyl capric acid at 80 o C is subjected to transesterification and vacuum devolatilization to obtain high-carbon fatty acid-terminated polyether ester C.

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Abstract

The invention provides a high-carbon fatty acid-capped polyether ester defoamer for papermaking. The components include: 50-75 parts of high-carbon fatty acid-capped polyether ester, 5-9 parts of high-carbon alcohol, 5 parts by weight -9 parts of high carbon fatty acid ester, 1-10 parts of surfactant, 14-22 parts of dispersant. The high-carbon fatty acid-terminated polyether ester defoamer for papermaking has the characteristics of excellent defoaming and anti-foaming properties in a high-temperature and strong alkali environment, low cost, no 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/12
Inventor 李晓天杨柏忠
Owner JIANGSU SAIOUXINYUE DEFOAMER
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