Water-based paint defoaming agent and preparation method thereof

A technology of water-based coatings and defoamers, applied in the chemical industry, can solve problems such as uneven performance, selection and use of defoamers, and high product prices

Pending Publication Date: 2022-07-01
南京德俊新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Water-based paint is a system that is prone to foaming. At present, the paint defoamers on the market are mainly polyester esters, polyether modified silicone oils, and alcohol compound types. There are many types of defoamers available, and the product prices are It is relatively high and the performance is uneven, which causes troubles for paint manufacturers to choose and use defoamers; the product technology involved in this patent has easy-to-obtain raw materials, excellent performance and good cost-effective advantages

Method used

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  • Water-based paint defoaming agent and preparation method thereof

Examples

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Effect test

Embodiment 1

[0020] This example provides a water-based coating defoamer and a preparation method thereof. The composition includes the following raw materials in parts by weight: 30 parts of potassium palmitate, 25 parts of polyether diol, 30 parts of polyether triol, hydrophilic white 10 parts of carbon black, 5 parts of Span, 5 parts of Tween and 15#800 parts of industrial white oil;

[0021] The preparation method of above-mentioned polyether glycol is as follows: adding 20 parts by weight of ethylene glycol, 80 parts by weight of propylene oxide and 1 part by weight of potassium hydroxide into the reactor, stirring and heating up to 130°C, pressurize to 0.9MPa, and react for 12h; then add 30 parts by weight of ethylene oxide, and react for 6h at a temperature of 120°C and a pressure of 0.5MPa; the condition at 130°C is Aging at constant temperature for 3 hours; vacuuming at a temperature of 100°C and a vacuum of -800mmHg to obtain crude polyether glycol; under the condition of 120°C, ...

Embodiment 2

[0025] This example provides a water-based coating defoamer and a preparation method thereof. The composition includes the following raw materials in parts by weight: 40 parts of zinc stearate, 15 parts of polyether diol, 25 parts of polyether triol, hydrophilic 15 parts of silica, 5 parts of TX series, 5 parts of NP series and 850 parts of alkyl benzene oil;

[0026] The preparation method of the above-mentioned polyether glycol is: adding the propylene glycol that the parts by weight are 10 parts, the propylene oxide that the parts by weight are 100 parts and the potassium hydroxide that the parts by weight are 1 part are added to the reaction kettle, and the stirring is heated to 130 ℃, pressurized to 0.9MPa, and reacted for 12h; then added 40 parts by weight of ethylene oxide, and reacted for 6h at a temperature of 120℃ and a pressure of 0.5MPa; at 130℃, the condition was constant temperature aging 3h; vacuumize under the condition that the temperature is 100°C and the vac...

Embodiment 3

[0030] This example provides a water-based coating defoamer and a preparation method thereof. The composition includes the following raw materials in parts by weight: 45 parts of aluminum stearate, 20 parts of polyether diol, 20 parts of polyether triol, hydrophobic white 15 parts of carbon black, 5 parts of polyether modified silicone oil, 5 parts of BY series and 900 parts of pharmaceutical grade white oil;

[0031]The preparation method of the above-mentioned polyether glycol is: adding the propylene glycol that the parts by weight are 10 parts, the propylene oxide that the parts by weight are 100 parts and the potassium hydroxide that the parts by weight are 1 part are added to the reaction kettle, and the stirring is heated to 130 ℃, pressurized to 0.9MPa, and reacted for 12h; then added 40 parts by weight of ethylene oxide, and reacted for 6h at a temperature of 120℃ and a pressure of 0.5MPa; at 130℃, the condition was constant temperature aging 3h; vacuumize under the c...

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Abstract

The water-based paint defoaming agent is prepared from the following raw materials in parts by weight: 30 to 60 parts of metallic soap, 1 to 5 parts of a catalyst, 5 to 10 parts of a solid dispersing agent, 15 to 40 parts of polyether glycol, 15 to 40 parts of polyether triol, 800 to 1000 parts of industrial oil and 8 to 20 parts of an emulsifying agent, the metallic soap comprises potassium palmitate, zinc stearate, aluminum stearate, magnesium linoleate and calcium oleate; the molecular weight of the dihydric alcohol is 2000-3000, and the molecular weight of the polyether trihydric alcohol with the general formula is 4000-6000; the solid dispersing agent is hydrophilic white carbon black or hydrophobic white carbon black, and the defoaming agent disclosed by the invention has the characteristics of high defoaming speed, strong defoaming capability and long foam inhibition time, and has special excellent performance in high-temperature and strong-acid systems.

Description

【Technical field】 [0001] The invention belongs to the field of chemical industry, and in particular relates to a water-based paint defoamer and a preparation method thereof. 【Background technique】 [0002] Waterborne coating defoamer is a composite product of organic polyether ester, mineral oil, polyether modified silicone oil, and alcohol. It does not produce surface defects or affect film formation, and has special effects on waterborne coating systems. [0003] After the emergence of synthetic resins, water-based coatings have developed rapidly; water-based coatings not only replace vegetable oils with synthetic materials, improve the performance of coatings, but also solve the harm caused by solvent gases in coating construction; in addition, due to the oil crisis, environmental pollution prevention, attention to ecological protection, further promote the rapid development of water-based coatings. [0004] Water-based paint is a system that is easy to foam. At present,...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): B01D19/04C07C41/03C07C43/13
CPCB01D19/0404C07C41/03C07C43/13
Inventor惠敏陈银芳陈卫东王夏峰
Owner南京德俊新材料科技有限公司