CN111111266A - Modified organic silicon defoaming agent and preparation method thereof - Google Patents
Modified organic silicon defoaming agent and preparation method thereof Download PDFInfo
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- CN111111266A CN111111266A CN201911397299.8A CN201911397299A CN111111266A CN 111111266 A CN111111266 A CN 111111266A CN 201911397299 A CN201911397299 A CN 201911397299A CN 111111266 A CN111111266 A CN 111111266A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/02—Foam dispersion or prevention
- B01D19/04—Foam dispersion or prevention by addition of chemical substances
- B01D19/0404—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/02—Foam dispersion or prevention
- B01D19/04—Foam dispersion or prevention by addition of chemical substances
- B01D19/0404—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance
- B01D19/0409—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance compounds containing Si-atoms
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Abstract
The invention discloses a modified organic silicon defoaming agent and a preparation method thereof, wherein the modified organic silicon defoaming agent comprises the following raw materials in parts by weight, 5-20 parts of dimethyl silicone oil; 5-10 parts of polyether modified silicone oil; 10-20 parts of hydrocarbonized oil; 1-5 parts of silicon dioxide; 2-5 parts of allyl glycidyl ether; 1-2 parts of fatty acid; 1-2 parts of a coupling agent; 2-5 parts of an emulsifier; 1-4 parts of a thickening agent; 50-80 parts of water, and the titanate coupling agent is a mixture of isopropyl dioleate acyloxy titanate and tetraisopropyl dititanate through the design of a formula, so that the stability after defoaming is better, the foaming is not easy to occur during medium-speed stirring, the use amount is small, and a better defoaming effect can be obtained under the condition of a small use amount.
Description
Technical Field
The invention relates to the field of defoaming agents, in particular to a modified organic silicon defoaming agent and a preparation method thereof.
Background
The defoaming agent, also known as an antifoaming agent, can generate a plurality of harmful foams in the industrial production process, needs to be added with defoaming, and is widely applied to removing the harmful foams generated in the production processes of industries such as latex, textile sizing, food fermentation, biomedicine, coating, petrochemical industry, paper making, industrial cleaning and the like. Generally, foams are coarse dispersions of gas in liquid, belonging to gas-liquid heterogeneous systems, gas-liquid dispersions with bulk densities close to that of gas but not close to that of liquid. When the liquid does not contain the surfactant, the bubbles can migrate to the surface of the liquid and break and disappear; when the liquid contains a surfactant, the surface of the bubbles forms a film sheet, and the foam becomes stable. The conventional defoaming agent compositions have a problem that sufficient defoaming property cannot be obtained. Particularly, in the emulsion type coating, the defoaming property is poor, and the problems of foam breaking prevention and foam inhibition are difficult to solve.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a modified organic silicon defoamer and a preparation method thereof, the high-efficiency water-based paint defoamer prepared by the invention contains a silicon dioxide component, has strong capability of eliminating tiny bubbles in a high-viscosity system, is suitable for transparent water-based paint, has strong defoaming and foam inhibiting capabilities, is suitable for polyurethane and acrylic adhesive systems, belongs to an emulsion type defoamer, has self-dispersion performance and is convenient to use; the problems that most of defoaming agents are low in defoaming speed and short in foam inhibition time in a high-viscosity system are solved, and the titanium ester coupling agent is a mixture of isopropyl dioleate acyloxy titanium ester and tetraisopropyl dititanate through the design of a formula, so that the defoaming agent is high in stability after defoaming and is not easy to foam during medium-speed stirring.
In order to achieve the purpose, the invention provides the following technical scheme: the modified organic silicon defoaming agent comprises the following raw materials, by weight, 5-20 parts of dimethyl silicone oil; 5-10 parts of polyether modified silicone oil; 10-20 parts of hydrocarbonized oil; 1-5 parts of silicon dioxide; 2-5 parts of allyl glycidyl ether; 1-2 parts of fatty acid; 1-2 parts of a coupling agent; 2-5 parts of an emulsifier; 1-4 parts of a thickening agent; 50-80 parts of water.
Preferably, the silicone oil comprises the following raw materials, by weight, 5-10 parts of dimethyl silicone oil; 5-6 parts of polyether modified silicone oil; 10-15 parts of hydrocarbonized oil; 1-3 parts of silicon dioxide; 2-3 parts of allyl glycidyl ether; 1-2 parts of fatty acid; 1-2 parts of a coupling agent; 2-5 parts of an emulsifier; 1-3 parts of a thickening agent; 50-80 parts of water.
Preferably, the coating comprises the following raw materials in parts by weight, 7 parts of dimethyl silicone oil; 5.5 parts of polyether modified silicone oil; 12 parts of hydrocarbonated oil; 1.5 parts of silicon dioxide; 2.5 parts of allyl glycidyl ether; 1.5 parts of fatty acid; 1.5 parts of a coupling agent; 3 parts of an emulsifier; 1.5 parts of a thickening agent; and 64 parts of water.
Preferably, the hydrocarbonated oil is a paraffin oil.
Preferably, the silicon dioxide is hydrophobic fumed silica.
Preferably, the fatty acid is palmitic acid.
Preferably, the coupling agent is a titanate coupling agent, the titanate coupling agent is a mixture of isopropyl dioleate acyloxy titanate and tetraisopropyl dititanate, the emulsifier is sorbitan monostearate, and the thickener is hydroxypropyl methyl cellulose.
The invention also provides a preparation method of the modified organic silicon defoaming agent, which comprises the following steps of (1): adding dimethyl silicone oil, polyether modified silicone oil, hydrocarbonated oil, silicon dioxide, allyl glycidyl ether, fatty acid, a coupling agent, an emulsifier, a thickening agent and water into a heating tank in proportion, heating to 100-150 ℃, keeping the temperature, stirring for 1-3 hours, and then cooling to 70-80 ℃ to obtain a premix;
step (2): emulsifying and stirring the pre-mixture at 70-80 ℃ for 1-2 h, and then cooling to room temperature to obtain a coarse emulsion; and homogenizing the crude emulsion for 0.5-1 h to obtain the defoaming agent.
Compared with the prior art, the invention has the following beneficial effects:
1. the efficient water-based paint defoamer prepared by the invention contains silicon dioxide components, has strong capability of eliminating micro bubbles in a high-viscosity system, is suitable for transparent water-based paint, has strong defoaming and foam inhibiting capabilities, is suitable for a polyurethane and acrylic emulsion system, belongs to an emulsion type defoamer, has self-dispersion performance, and is convenient to use; the problems that most of defoaming agents are low in defoaming speed and short in defoaming time in a high-viscosity system are solved, and the titanate coupling agent is a mixture of isopropyl dioleate acyloxy titanate and tetraisopropyl dititanate through the design of a formula, so that the defoaming agent has better stability after defoaming, is not easy to foam during medium-speed stirring, is small in using amount, and can achieve a better defoaming effect under the condition of less using amount.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention discloses a modified organic silicon defoaming agent which comprises the following raw materials in parts by weight, 5-20 parts of dimethyl silicone oil; 5-10 parts of polyether modified silicone oil; 10-20 parts of hydrocarbonized oil; 1-5 parts of silicon dioxide; 2-5 parts of allyl glycidyl ether; 1-2 parts of fatty acid; 1-2 parts of a coupling agent; 2-5 parts of an emulsifier; 1-4 parts of a thickening agent; 50-80 parts of water. Further, the coating comprises the following raw materials, by weight, 5-10 parts of dimethyl silicone oil; 5-6 parts of polyether modified silicone oil; 10-15 parts of hydrocarbonized oil; 1-3 parts of silicon dioxide; 2-3 parts of allyl glycidyl ether; 1-2 parts of fatty acid; 1-2 parts of a coupling agent; 2-5 parts of an emulsifier; 1-3 parts of a thickening agent; 50-80 parts of water.
The oil is composed of a hydrocarbonate, a coupling agent, an emulsifier, a thickening agent and a coupling agent, wherein the hydrocarbonate is paraffin oil, silicon dioxide is hydrophobic fumed silica, fatty acid is palmitic acid, the coupling agent is a titanate coupling agent, the titanate coupling agent is a mixture of isopropyl dioleate acyloxy titanate and tetraisopropyl dititanate, the emulsifier is sorbitan monostearate, and the thickening agent is hydroxypropyl methyl cellulose.
Embodiment 1, a modified silicone defoamer, comprising the following raw materials, by weight, 5 parts of dimethicone; 5 parts of polyether modified silicone oil; 10 parts of hydrocarbonated oil; 1 part of silicon dioxide; 2 parts of allyl glycidyl ether; 1 part of fatty acid; 1 part of a coupling agent; 2 parts of an emulsifier; 1 part of a thickening agent; 50 parts of water.
Embodiment 2, a modified silicone defoamer, comprising the following raw materials, by weight, 20 parts of dimethicone; 10 parts of polyether modified silicone oil; 20 parts of hydrocarbonated oil; 5 parts of silicon dioxide; 5 parts of allyl glycidyl ether; 2 parts of fatty acid; 2 parts of a coupling agent; 5 parts of an emulsifier; 4 parts of a thickening agent; 80 parts of water.
Embodiment 3, a modified silicone defoamer, comprising the following raw materials, by weight, 10 parts of dimethicone; 6 parts of polyether modified silicone oil; 15 parts of hydrocarbonated oil; 3 parts of silicon dioxide; 3 parts of allyl glycidyl ether; 2 parts of fatty acid; 2 parts of a coupling agent; 5 parts of an emulsifier; 3 parts of a thickening agent; 80 parts of water.
Embodiment 4, a modified silicone defoamer, comprising the following raw materials, by weight, 7 parts of dimethicone; 5.5 parts of polyether modified silicone oil; 12 parts of hydrocarbonated oil; 1.5 parts of silicon dioxide; 2.5 parts of allyl glycidyl ether; 1.5 parts of fatty acid; 1.5 parts of a coupling agent; 3 parts of an emulsifier; 1.5 parts of a thickening agent; and 64 parts of water.
Embodiment 5, a modified silicone defoamer, comprising the following raw materials, by weight, 7 parts of dimethicone; 5.5 parts of polyether modified silicone oil; 12 parts of hydrocarbonated oil; 1.5 parts of silicon dioxide; 2.5 parts of allyl glycidyl ether; 1.5 parts of fatty acid; 1.0 part of isopropyl dioleic acid acyloxy titanate and 0.5 part of tetraisopropyl dititanate; 3 parts of an emulsifier; 1.5 parts of a thickening agent; and 64 parts of water.
Comparative example 1, a modified silicone defoamer comprising the following raw materials in parts by weight, 7 parts of dimethicone; 5.5 parts of polyether modified silicone oil; 12 parts of hydrocarbonated oil; 1.5 parts of silicon dioxide; 2.5 parts of allyl glycidyl ether; 1.5 parts of fatty acid; 1.5 parts of isopropyl dioleate acyloxy titanate; 3 parts of an emulsifier; 1.5 parts of a thickening agent; and 64 parts of water.
Comparative example 2, a modified silicone defoamer, comprising the following raw materials, by weight, 7 parts of dimethicone; 5.5 parts of polyether modified silicone oil; 12 parts of hydrocarbonated oil; 1.5 parts of silicon dioxide; 2.5 parts of allyl glycidyl ether; 1.5 parts of fatty acid; 1.5 parts of tetraisopropyl dititanate; 3 parts of an emulsifier; 1.5 parts of a thickening agent; and 64 parts of water.
Comparative example 3, a modified silicone defoamer comprising the following raw materials in parts by weight, 7 parts of dimethicone; 5.5 parts of polyether modified silicone oil; 12 parts of hydrocarbonated oil; 1.5 parts of silicon dioxide; 2.5 parts of allyl glycidyl ether; 1.5 parts of fatty acid; 0.5 part of isopropyl dioleic acid acyloxy titanate and 1.5 parts of tetraisopropyl dititanate; 3 parts of an emulsifier; 1.5 parts of a thickening agent; and 64 parts of water.
Example 1-comparative example 3 was prepared in the following manner: adding dimethyl silicone oil, polyether modified silicone oil, hydrocarbonated oil, silicon dioxide, allyl glycidyl ether, fatty acid, a coupling agent, an emulsifier, a thickening agent and water into a heating tank in proportion, heating to 100-150 ℃, keeping the temperature, stirring for 1-3 hours, and then cooling to 70-80 ℃ to obtain a premix; emulsifying and stirring the pre-mixture at 70-80 ℃ for 1-2 h, and then cooling to room temperature to obtain a coarse emulsion; and homogenizing the crude emulsion for 0.5-1 h to obtain the defoaming agent.
Comparative example 1
Commercially available antifoam agents.
The defoaming agents prepared in example 1-comparative example 3 were subjected to performance test, the foaming agent was acrylic emulsion, 400ml of the above foaming agent was added into a 1000ml measuring cylinder, air was blown in through an air pump to raise the foam height to the 1000ml mark, and blowing was stopped, 0.5ml of the defoaming agents prepared in example 1, example 2, example 3, example 4, comparative example 1, comparative example 2, comparative example 3, and 0.35ml of example 5 were added respectively, and compared with comparative example 1 of a commercially available defoaming agent, the defoaming time of each defoaming agent was recorded to 500ml, and then blowing was performed again, and the rise of foam after defoaming was recorded to 800ml and 1000ml marks, and the experimental results are shown in table 1.
TABLE 1 antifoam Performance test results
As shown in Table 1, the defoaming agent prepared by the invention is obviously superior to the commercially available defoaming agent in defoaming performance and foam inhibiting performance.
Comparative example 2
The defoaming agents prepared in the examples 1 to the comparative example 3 were subjected to performance test, the foaming solution was acrylic emulsion, 400ml of the above foaming solution was added into a 1000ml measuring cylinder, air was blown in through an air pump to raise the height of foam to a 1000ml scale, and then air blowing was stopped, 0.5ml of the above examples 1 to the comparative example 3 was added, and compared with the commercial defoaming agent comparative example 1, the defoaming time of each defoaming agent was recorded to 500ml, and then air blowing was performed again, and the rise of foam after defoaming was recorded to 800ml and 1000ml, and the experimental results are shown in table 2.
TABLE 2 Performance test results for the same amount of defoamer used
Referring to tables 1 and 2, the defoaming agent of the present invention can achieve a smaller amount, and also can achieve excellent defoaming performance, as well as excellent foam suppressing performance.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (8)
1. The modified organic silicon defoaming agent is characterized by comprising the following raw materials, by weight, 5-20 parts of dimethyl silicone oil; 5-10 parts of polyether modified silicone oil; 10-20 parts of hydrocarbonized oil; 1-5 parts of silicon dioxide; 2-5 parts of allyl glycidyl ether; 1-2 parts of fatty acid; 1-2 parts of a coupling agent; 2-5 parts of an emulsifier; 1-4 parts of a thickening agent; 50-80 parts of water.
2. The modified organic silicon defoaming agent according to claim 1 is characterized by comprising the following raw materials, by weight, 5-10 parts of dimethyl silicone oil; 5-6 parts of polyether modified silicone oil; 10-15 parts of hydrocarbonized oil; 1-3 parts of silicon dioxide; 2-3 parts of allyl glycidyl ether; 1-2 parts of fatty acid; 1-2 parts of a coupling agent; 2-5 parts of an emulsifier; 1-3 parts of a thickening agent; 50-80 parts of water.
3. The modified organosilicon antifoaming agent according to claim 2, characterized by comprising the following raw materials, by weight, 7 parts of dimethicone; 5.5 parts of polyether modified silicone oil; 12 parts of hydrocarbonated oil; 1.5 parts of silicon dioxide; 2.5 parts of allyl glycidyl ether; 1.5 parts of fatty acid; 1.5 parts of a coupling agent; 3 parts of an emulsifier; 1.5 parts of a thickening agent; and 64 parts of water.
4. The modified silicone defoamer as set forth in claim 3, wherein said hydrocarbonated oil is a paraffin oil.
5. The modified organosilicon antifoaming agent according to claim 4, characterized in that the silica is hydrophobic fumed silica.
6. The modified silicone defoamer as set forth in claim 5, wherein said fatty acid is palmitic acid.
7. The modified silicone defoamer as claimed in claim 6, wherein said coupling agent is a titanate coupling agent, said titanate coupling agent is a mixture of isopropyl dioleate acyloxy titanate and tetraisopropyl dititanate, said emulsifier is sorbitan monostearate, and said thickener is hydroxypropyl methylcellulose.
8. The preparation method of the modified organic silicon defoaming agent is characterized by comprising the following steps: step (1): adding dimethyl silicone oil, polyether modified silicone oil, hydrocarbonated oil, silicon dioxide, allyl glycidyl ether, fatty acid, a coupling agent, an emulsifier, a thickening agent and water into a heating tank in proportion, heating to 100-150 ℃, keeping the temperature, stirring for 1-3 hours, and then cooling to 70-80 ℃ to obtain a premix;
step (2): emulsifying and stirring the pre-mixture at 70-80 ℃ for 1-2 h, and then cooling to room temperature to obtain a coarse emulsion; and homogenizing the crude emulsion for 0.5-1 h to obtain the defoaming agent.
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| CN111974032A (en) * | 2020-09-07 | 2020-11-24 | 安徽銮威化工科技开发有限公司 | Modified organic silicon defoaming agent and preparation method thereof |
| CN112023452A (en) * | 2020-08-19 | 2020-12-04 | 肇庆领誉环保实业有限公司 | Defoaming agent for domestic sewage treatment and preparation method thereof |
| CN113546452A (en) * | 2021-04-28 | 2021-10-26 | 淄博惠生工贸有限公司 | Modified organic silicon defoaming agent and preparation method thereof |
| CN114632352A (en) * | 2022-03-31 | 2022-06-17 | 山东师范大学实验厂 | Polyether compound modified polysiloxane body defoaming agent, and preparation method and application thereof |
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Application publication date: 20200508 |