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CN-122006297-A - Powder defoaming agent with lasting foam inhibition performance and preparation method thereof

CN122006297ACN 122006297 ACN122006297 ACN 122006297ACN-122006297-A

Abstract

The invention discloses a powder defoaming agent with lasting foam inhibition performance and a preparation method thereof, and relates to the technical field of defoaming agents. The powder defoaming agent comprises, by weight, 30-40 parts of polyether modified silicone oil, 4-6 parts of organic silicon emulsion, 3-5 parts of dispersing agent, 4-6 parts of surfactant, 1-2 parts of thickener and 30-50 parts of porous carrier. The powder defoaming agent prepared by the invention has good defoaming and foam inhibiting performance, dispersion performance and high-temperature stability.

Inventors

  • YANG BAIZHONG
  • CHEN SHIHAI
  • YANG YINGCHAO
  • MIN WEI
  • XU HUI

Assignees

  • 江苏赛欧信越消泡剂有限公司

Dates

Publication Date
20260512
Application Date
20260410

Claims (10)

  1. 1. The powder defoaming agent with the lasting foam inhibition performance is characterized by comprising the following raw materials in parts by weight: 30-40 parts of polyether modified silicone oil, 4-6 parts of organosilicon emulsion, 3-5 parts of dispersing agent, 4-6 parts of surfactant, 1-2 parts of thickener and 30-50 parts of porous carrier; The structural formula of the surfactant is as follows: ; the structural formula of the dispersing agent is as follows: 。
  2. 2. The powder defoamer with durable foam inhibition performance according to claim 1, wherein the surfactant is prepared by the following method: s1, N' -bis (2-amino ethyl) butanediamide reacts with decyl succinic anhydride to generate an intermediate 1, S2, reacting the intermediate 1 with 2- (3, 4-epoxycyclohexane) ethyl trimethoxy silane to generate an intermediate 2, S3, reacting dodecyl dimethyl tertiary amine with 3-bromo-2, 2-bis (bromomethyl) propionic acid to generate quaternary ammonium salt compound, And S4, reacting the quaternary ammonium salt compound with the intermediate 2 to generate the surfactant.
  3. 3. The powder defoaming agent with lasting foam inhibition performance according to claim 2, wherein in the step S1, the feeding molar ratio of N, N' -bis (2-aminoethyl) butanediamide to decyl succinic anhydride is 1 (2.05-2.1).
  4. 4. The powder defoaming agent with lasting foam inhibition performance according to claim 2, wherein in the step S2, the feeding molar ratio of the intermediate 1 to the 2- (3, 4-epoxycyclohexane) ethyl trimethoxysilane is 1 (2.02-2.05).
  5. 5. The powder defoaming agent with lasting foam inhibition performance according to claim 2, wherein in the step S3, the feeding molar ratio of the dodecyl dimethyl tertiary amine to the 3-bromo-2, 2-bis (bromomethyl) propionic acid is (3.05-3.1): 1.
  6. 6. The powder defoaming agent with lasting foam inhibition performance according to claim 2, wherein in the step S4, the feeding molar ratio of the quaternary ammonium salt compound to the intermediate 2 is (2.02-2.05): 1.
  7. 7. The powder defoamer with durable foam inhibition performance according to claim 1, wherein the dispersant is prepared by the following method: a1, hexaethylene glycol reacts with 6- (acryloyloxy) caproic acid to generate an intermediate A, A2, reacting the intermediate A with 6-amino hexane phosphoric acid to generate the dispersing agent.
  8. 8. The powder defoaming agent with lasting foam inhibition performance according to claim 7, wherein in the step A1, the feeding molar ratio of the hexaethylene glycol to the 6- (acryloyloxy) hexanoic acid is 1:2.03, and in the step A2, the feeding molar ratio of the intermediate A to the 6-amino hexane phosphoric acid is 1:2.05.
  9. 9. The powder defoaming agent with lasting foam inhibition performance according to claim 1, wherein the thickening agent is sodium alginate, and the porous carrier is formed by compounding silicon dioxide and diatomite.
  10. 10. A method for preparing the powder defoaming agent with lasting foam inhibition performance according to any one of claims 1 to 9, which is characterized by comprising the following steps: (1) Weighing 30-40 parts of polyether modified silicone oil, 4-6 parts of organic silicon emulsion, 3-5 parts of dispersing agent, 4-6 parts of surfactant, 1-2 parts of thickener and 30-50 parts of porous carrier according to parts by weight; (2) The polyether modified silicone oil, the organosilicon emulsion, the dispersing agent, the surfactant and the thickening agent are sheared and emulsified, then the porous carrier is added and stirred uniformly, the high-pressure homogenizer is used for carrying out high-pressure homogenizing and dispersing on the mixed material, and the powder defoaming agent with lasting foam inhibition performance is obtained after drying, crushing and sieving.

Description

Powder defoaming agent with lasting foam inhibition performance and preparation method thereof Technical Field The invention relates to the technical field of defoamers, in particular to a powder defoamer with lasting foam inhibition performance and a preparation method thereof. Background The defoamer is an important industrial auxiliary agent and is widely applied to industries such as coating, printing ink, papermaking, textile printing and dyeing, sewage treatment, food processing, petrochemical industry and the like. In the actual production process, a large amount of foam is easy to generate in the system due to factors such as stirring, gas entrainment, chemical reaction and the like. Excessive foam not only reduces the effective utilization rate of equipment and prolongs the production time, but also can cause material overflow and environmental pollution, and even directly affects the quality of the final product. The existing defoamer is mainly divided into two main categories, namely a liquid defoamer and a powder defoamer. Although the liquid defoamer has the capability of quick foam breaking, the liquid defoamer is limited in application in certain dry-mixed systems or powdery products and is easy to delaminate and leak in the storage and transportation processes. In contrast, the powder defoaming agent has the advantages of stable storage, convenient transportation, easy uniform mixing with powder materials and the like, and is particularly suitable for powdery or granular product systems such as dry powder coating, dry mixed mortar, detergents, pesticide water dispersible granules and the like. However, the existing powder defoamer generally has the problem of insufficient foam inhibition durability. The traditional powder defoaming agent is prepared by taking hydrophobic silica, white carbon black and the like as carriers and loading active ingredients such as organic silicone oil, mineral oil or polyether and the like. The defoaming agent can quickly break foam in the initial stage, but as foam in a system is repeatedly generated, active ingredients are easy to be quickly exhausted or diluted and wrapped by the system, so that the foam inhibition time is short, and the foam regeneration phenomenon is serious. Under the condition of a high-foam system or long-time stirring, the foam inhibition effect can only be maintained for a few minutes to tens of minutes, and the requirement of actual production on the lasting foam inhibition performance cannot be met. The Chinese patent publication No. CN111467843A discloses a powder defoaming agent and a preparation method thereof, wherein the defoaming agent comprises 45-55% of polyether defoaming mother liquor, 28-38% of organosilicon defoaming agent mother liquor, 7% of quicklime, 9.8% of water and 0.2% of flame retardant. Disclosure of Invention Aiming at the defects existing in the prior art, the invention aims to provide a powder defoaming agent with lasting foam inhibition performance and a preparation method thereof. In order to achieve the above object, the present invention is realized by the following technical scheme: The powder defoaming agent with the lasting foam inhibition performance comprises the following raw materials in parts by weight: 30-40 parts of polyether modified silicone oil, 4-6 parts of organosilicon emulsion, 3-5 parts of dispersing agent, 4-6 parts of surfactant, 1-2 parts of thickener and 30-50 parts of porous carrier; The structural formula of the surfactant is as follows: ; the structural formula of the dispersing agent is as follows: 。 the surfactant is prepared by the following method: s1, N' -bis (2-amino ethyl) butanediamide reacts with decyl succinic anhydride to generate an intermediate 1, S2, reacting the intermediate 1 with 2- (3, 4-epoxycyclohexane) ethyl trimethoxy silane to generate an intermediate 2, S3, reacting dodecyl dimethyl tertiary amine with 3-bromo-2, 2-bis (bromomethyl) propionic acid to generate quaternary ammonium salt compound, And S4, reacting the quaternary ammonium salt compound with the intermediate 2 to generate the surfactant. In the step S1, the feeding mole ratio of the N, N' -bis (2-aminoethyl) butanediamide to the decyl succinic anhydride is 1 (2.05-2.1). In the step S2, the feeding molar ratio of the intermediate 1 to the 2- (3, 4-epoxycyclohexane) ethyltrimethoxysilane is 1 (2.02-2.05). In the step S3, the feeding mole ratio of the dodecyl dimethyl tertiary amine to the 3-bromo-2, 2-bis (bromomethyl) propionic acid is (3.05-3.1): 1. In the step S4, the feeding mole ratio of the quaternary ammonium salt compound to the intermediate 2 is (2.02-2.05): 1. The dispersant is prepared by the following method: a1, hexaethylene glycol reacts with 6- (acryloyloxy) caproic acid to generate an intermediate A, A2, reacting the intermediate A with 6-amino hexane phosphoric acid to generate the dispersing agent. In the step A1, the feeding molar ratio of the hexaethylene glycol to the 6- (acryl