A kind of emulsion-type fluorine-containing silicone defoamer for oil-water two-phase system and preparation method thereof

Abstract

The invention provides an emulsion type fluorine-containing organosilicone defoaming agent for an oil and aqueous two-phase system and a preparation method thereof, wherein the defoaming agent includes the following components: polyether and acrylate co-modified fluorine-containing silicone oil, silicon paste, silicon resin, an emulsifier, a thickener and water. The defoaming and foam inhibition performance of an aqueous phase and an oil phase are improved by introducing the silicon resin and a fluorine-containing group into the system. When the defoaming agent is used in the aqueous phase system, solubilization of the silicone oil in the aqueous-phase system can be effectively inhibited, the defoaming and foam inhibition performance is improved, and the high-temperature strong alkaline resistance can be improved. When the defoaming agent is used in the oil phase system, the oil resistance of dimethicone can be significantly increased, and the defoaming agent becomes a highly efficientdefoaming agent in raw oil, lubricating oil, organic solvents and other oil-phase systems.

Description

technical field

[0001] The invention relates to an emulsion-type fluorine-containing silicone defoamer used in an oil-water two-phase system and a preparation method thereof, belonging to the technical field of fine chemical additives. Background technique

[0002] In industrial production, a large amount of foam is often produced due to operations such as stirring, vibration, and boiling. If not properly suppressed, the foam will bring a lot of trouble to production, such as affecting the normal production, reducing the effective load of equipment, and causing product quality. and reduced production capacity. In order to eliminate and suppress foam, the most effective and economical method is to add defoamer.

[0003] Substances suitable for use as defoamers must have two properties: insoluble or slightly soluble in the foaming medium; and have a lower surface tension than the foaming medium. Silicone oil-based water-phase defoamers have the characteristics of good therma...

Examples

Embodiment 1

[0050] A preparation method of an emulsion type fluorine-containing silicone defoamer, comprising the steps of:

[0051] (1) Add 10 parts of silicone paste A, 5 parts of polyether and acrylate co-modified fluorine-containing silicone oil B, 5 parts of silicone resin A, 4 parts of S-60, and 2 parts of T-60 into the reaction vessel, and heat To 65°C, stir and emulsify for 45 minutes.

[0052] (2) Slowly add 73.8 parts of prepared hot water with a temperature of 60° C. into the reaction vessel dropwise. After the phase inversion of the system occurs, quickly add the remaining water dropwise. After the dropwise addition is completed, continue the reaction for 75 minutes.

[0053] (3) Add 0.2 parts of thickener sodium carboxymethylcellulose to the system, continue stirring for 75 minutes, stop heating, and continue stirring for 45 minutes to obtain milky white defoamer emulsion 1.

Embodiment 2

[0055] A preparation method of an emulsion type fluorine-containing silicone defoamer, comprising the steps of:

[0056] (1) Add 16 parts of silicone paste B, 8 parts of polyether and acrylate co-modified fluorine-containing silicone oil A, 8 parts of silicone resin B, 2.7 parts of S-80, and 1.3 parts of T-80 into the reaction vessel, and heat To 50°C, stir and emulsify for 75min.

[0057] (2) Slowly add 63.4 parts of prepared hot water with a temperature of 80° C. into the reaction vessel dropwise. After the phase inversion of the system occurs, quickly add the remaining water dropwise. After the dropwise addition is completed, continue the reaction for 45 minutes.

[0058] (3) Add 0.6 parts of stearyl polyoxyethylene ether methacrylate thickener to the system, continue stirring for 45 minutes, stop heating, and continue stirring for 75 minutes to obtain milky white defoamer emulsion 2.

Embodiment 3

[0060] A preparation method of an emulsion type fluorine-containing silicone defoamer, comprising the steps of:

[0061] (1) Add 14.6 parts of silicone paste C, 10 parts of polyether and acrylate co-modified fluorine-containing silicone oil C, 10 parts of silicone resin A, 3.3 parts of S-60, 1.7 parts of T-80 into the reaction vessel, and heat To 60°C, stir and emulsify for 60 minutes.

[0062] (2) Slowly add 60 parts of prepared hot water with a temperature of 70° C. into the reaction vessel dropwise. After the phase inversion of the system occurs, quickly add the remaining water dropwise. After the dropwise addition is completed, continue the reaction for 60 minutes.

[0063] (3) Add 0.4 parts of stearyl polyoxyethylene ether methacrylate thickener to the system, continue stirring for 60 minutes, stop heating, and continue stirring for 60 minutes to obtain milky white defoamer emulsion 3.

technical field

[0001] The invention relates to an emulsion-type fluorine-containing silicone defoamer used in an oil-water two-phase system and a preparation method thereof, belonging to the technical field of fine chemical additives. Background technique

[0002] In industrial production, a large amount of foam is often produced due to operations such as stirring, vibration, and boiling. If not properly suppressed, the foam will bring a lot of trouble to production, such as affecting the normal production, reducing the effective load of equipment, and causing product quality. and reduced production capacity. In order to eliminate and suppress foam, the most effective and economical method is to add defoamer.

[0003] Substances suitable for use as defoamers must have two properties: insoluble or slightly soluble in the foaming medium; and have a lower surface tension than the foaming medium. Silicone oil-based water-phase defoamers have the characteristics of good therma...

Examples

Embodiment 1

[0050] A preparation method of an emulsion type fluorine-containing silicone defoamer, comprising the steps of:

[0051] (1) Add 10 parts of silicone paste A, 5 parts of polyether and acrylate co-modified fluorine-containing silicone oil B, 5 parts of silicone resin A, 4 parts of S-60, and 2 parts of T-60 into the reaction vessel, and heat To 65°C, stir and emulsify for 45 minutes.

[0052] (2) Slowly add 73.8 parts of prepared hot water with a temperature of 60° C. into the reaction vessel dropwise. After the phase inversion of the system occurs, quickly add the remaining water dropwise. After the dropwise addition is completed, continue the reaction for 75 minutes.

[0053] (3) Add 0.2 parts of thickener sodium carboxymethylcellulose to the system, continue stirring for 75 minutes, stop heating, and continue stirring for 45 minutes to obtain milky white defoamer emulsion 1.

Embodiment 2

[0055] A preparation method of an emulsion type fluorine-containing silicone defoamer, comprising the steps of:

[0056] (1) Add 16 parts of silicone paste B, 8 parts of polyether and acrylate co-modified fluorine-containing silicone oil A, 8 parts of silicone resin B, 2.7 parts of S-80, and 1.3 parts of T-80 into the reaction vessel, and heat To 50°C, stir and emulsify for 75min.

[0057] (2) Slowly add 63.4 parts of prepared hot water with a temperature of 80° C. into the reaction vessel dropwise. After the phase inversion of the system occurs, quickly add the remaining water dropwise. After the dropwise addition is completed, continue the reaction for 45 minutes.

[0058] (3) Add 0.6 parts of stearyl polyoxyethylene ether methacrylate thickener to the system, continue stirring for 45 minutes, stop heating, and continue stirring for 75 minutes to obtain milky white defoamer emulsion 2.

Embodiment 3

[0060] A preparation method of an emulsion type fluorine-containing silicone defoamer, comprising the steps of:

[0061] (1) Add 14.6 parts of silicone paste C, 10 parts of polyether and acrylate co-modified fluorine-containing silicone oil C, 10 parts of silicone resin A, 3.3 parts of S-60, 1.7 parts of T-80 into the reaction vessel, and heat To 60°C, stir and emulsify for 60 minutes.

[0062] (2) Slowly add 60 parts of prepared hot water with a temperature of 70° C. into the reaction vessel dropwise. After the phase inversion of the system occurs, quickly add the remaining water dropwise. After the dropwise addition is completed, continue the reaction for 60 minutes.

[0063] (3) Add 0.4 parts of stearyl polyoxyethylene ether methacrylate thickener to the system, continue stirring for 60 minutes, stop heating, and continue stirring for 60 minutes to obtain milky white defoamer emulsion 3.

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