Mineral oil defoaming agent and preparation method thereof

A technology of mineral oil and defoamer, applied in separation methods, chemical instruments and methods, foam dispersion/prevention, etc., to achieve improved compatibility and fluidity, and better compatibility

Active Publication Date: 2018-11-06
安徽銮威化工科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the problems of shrinkage cavity, pinhole, fish eye, and late-stage foam suppression caused by the use of the existing mineral oil defoamer in the subsequent process of styrene-butadiene latex, the present invention provides a method that can effectively inhibit the production process of styrene-butadiene latex Mineral oil defoamer and preparation method thereof for effective control of oil shrinkage, pinholes, and fish eyes in subsequent coatings at the same time as harmful foams in polymerization, stripping, and filling

Method used

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  • Mineral oil defoaming agent and preparation method thereof
  • Mineral oil defoaming agent and preparation method thereof
  • Mineral oil defoaming agent and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0072] A kind of mineral oil defoamer of embodiment 1, comprises the following components by weight,

[0073]

[0074] A preparation method of the aforementioned mineral oil defoamer, comprising the following steps:

[0075] Take 3 parts of hydroxyl-terminated polydimethylsiloxane, add it to the cleaned reactor, slowly stir in batches (stirring speed is 40rpm), add hydrophobic fumed silica, stir evenly, increase the stirring speed to 80rpm, and Raise the temperature to 130±2°C at a speed of 5°C / min. After 2 hours of heat preservation, vacuumize (vacuum degree is -0.05mpa) and maintain this temperature for 0.5 hours. / min, the active silicon premix A liquid is obtained.

[0076] In another cleaned reactor, add mineral white oil, ethylene bisstearamide, and modified polyether fat to stir and raise the temperature to 120±2°C at a speed of 5°C / min, keep it warm for 2 hours, and then maintain this temperature Vacuumize for 0.5 hours (vacuum degree is -0.05mpa), add surface act...

Embodiment 2

[0078] A kind of mineral oil defoamer of embodiment 2, comprises the following components by weight,

[0079]

[0080] A preparation method of the aforementioned mineral oil defoamer, comprising the following steps:

[0081] Take 1.5 parts of hydroxyl-terminated polydimethylsiloxane, add it to the cleaned reactor, slowly stir in batches (stirring speed is 50rpm), add hydrophobic fumed silica, stir evenly, increase the stirring speed to 100rpm, and Raise the temperature to 140±2°C at a speed of 5°C / min. After 3 hours of heat preservation, vacuumize (vacuum degree is -0.05mpa) and maintain this temperature for 0.6 hours. / min, the active silicon premix A liquid is obtained.

[0082] In another cleaned reactor, add mineral white oil, fatty acid with 18 carbon atoms, ethylene bisstearamide, and modified polyether fat to stir and heat up to 130±2°C at a speed of 5°C / min. Insulate for 3 hours, then maintain this temperature and vacuum for 0.6 hours (vacuum degree is -0.05mpa, a...

Embodiment 3

[0084] A kind of mineral oil defoamer of embodiment 2, comprises the following components by weight,

[0085]

[0086]

[0087] A preparation method of the aforementioned mineral oil defoamer, comprising the following steps:

[0088] Take 5 parts of hydroxyl-terminated polydimethylsiloxane, add it to the cleaned reactor, slowly stir in batches (stirring speed is 70rpm), add hydrophobic fumed silica, stir evenly, increase the stirring speed to 120rpm, and Raise the temperature to 150±2°C at a speed of 5°C / min. After 4 hours of heat preservation, vacuumize (vacuum degree is -0.05mpa) and maintain this temperature for 1 hour. After the heat preservation is completed, disperse at a high speed for 0.5 hours, and the dispersion speed is 2000r / min, the active silicon premix A liquid is obtained.

[0089] In another cleaned reactor, add mineral white oil, double aluminum stearate, and modified polyether fat to stir and raise the temperature to 150±2°C at a speed of 5°C / min, ke...

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Abstract

The invention discloses a mineral oil defoaming agent and a preparation method thereof, and belongs to the technical field of fine chemical auxiliaries. The mineral oil defoaming agent provided by theinvention comprises the following components in parts by weight: 3-10 parts of hydroxyl-terminated polydimethylsiloxane; 5-20 parts of hydrophobic silicon dioxide; 40-80 parts of hydrocarbon oil; 10-35 parts of a defoaming coagent; 5-15 parts of a surface active emulsifier; and 1-6 parts of hydroxy acrylic resin. By adopting the mineral oil defoaming agent prepared by the invention, not only arethe polymerization, steam stripping and filling of harmful foam during a styrene-butadiene latex production process effectively inhibited, but also the effective control on oil shrinkage, pinhole, fisheye and foam inhibition of a subsequent coating is realized; at the same time, the mineral oil defoaming agent has the advantages of good stability, less addictive amount and the like.

Description

technical field [0001] The invention belongs to the technical field of fine chemical additives, and more specifically relates to a mineral oil defoamer and a preparation method thereof. Background technique [0002] The synthesis of styrene-butadiene latex uses butadiene and styrene as the main monomers, supplemented by unsaturated carboxylic acids, nitriles, amides and other functional monomers, and adopts an anionic and nonionic emulsification system and a thermal initiation system. Carry out free radical emulsion polymerization. Due to the existence of the anionic and nonionic compound emulsification system, the latex will produce harmful foam during the polymerization reaction process, stripping process, filling process and subsequent application process, which will bring great harm to industrial production. In production, generally Add defoamer to eliminate harmful foam. [0003] As we all know, a good defoamer must meet the following conditions: ① chemically inert, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04
CPCB01D19/0404B01D19/0409
Inventor 朱明琴刘德明刘祖彪钱金岗
Owner 安徽銮威化工科技开发有限公司
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