Adhesive silicone grease efficient defoaming agent and preparation method thereof

Abstract

The invention belongs to the technical field of chemical engineering, and particularly relates to an adhesive silicone grease efficient defoaming agent and a preparation method thereof. Comprising the following raw materials: 0.2-0.5 part of side hydrogen-containing silicone oil, 10-15 parts of vinyl-terminated silicone oil, 2-5 parts of simethicone, a trace amount of a karstedt catalyst, 3-5 parts of precipitated white carbon black, 1-3 parts of silicon resin, 4-10 parts of an emulsifier, 0.2-2 parts of a thickener, 0.2-2 parts of a sodium hydroxide solution and 55-80 parts of emulsified water. Selection and proportion of main components of the defoaming agent are optimally designed, meanwhile, in the preparation process, side hydrogen-containing silicone oil and vinyl-terminated silicone oil are subjected to an addition reaction under the action of a karstedt catalyst to generate adhesive silicone grease, the adhesive silicone grease is bonded with fumed silica and silicon resin at a high temperature, and then an emulsifier is added into an oil phase to prepare the defoaming agent. The defoaming agent has the characteristics of high defoaming speed and high foam inhibition capacity, particularly has excellent defoaming and foam inhibition effects in a glass fiber system and a chemical fiber system, and does not generate side effects.

Description

Technical Field

[0001] The invention belongs to the technical field of chemical industry, and in particular relates to an adhesive silicone grease high-efficiency defoaming agent and a preparation method thereof. Background Art

[0002] Defoamers refer to substances that can reduce the surface tension of water, solutions, suspensions, etc., prevent the formation of foam, or reduce or eliminate the original foam. In the papermaking process, due to unreasonable sizing, poorly washed pulp, the use of alkaline fillers in acidic systems, and the addition of various additives, foam will accumulate in the wet system of papermaking, causing foam point curtains to form on the paper. Depending on the specific situation, various defoamers can be added to the papermaking production process. The defoamers used in the early days included hydrocarbon oils such as kerosene and paraffin oil, sulfonated oil, sodium oleate, octanol, etc. The effective components of the defoamers that are widely used recently include silicones, high carbon alcohols, polyether surfactants, fatty amide surfactants, etc.

[0003] Existing high-efficiency defoamers such as patent number: CN115282644A, a method for a high-efficiency modified silicon ether defoamer and its preparation method, discloses that the molecular structure of higher fatty alcohols is improved, the melting point is reduced from the physical properties to improve the stability of the prepared higher carbon alcohol emulsion and extend the storage period, and the defoaming, foam suppression and degassing properties are combined. Silicone-modified higher fatty alcohol ester defoamer can reduce the surface tension of the liquid, prevent the formation of bubbles, and reduce the original bubbles, thereby achieving the effects of breaking bubbles and suppressing bubbles at the same time, and achieving a stable defoaming effect;

[0004] However, the defoamers in the prior art are mainly based on high-carbon alcohol emulsification, and high-carbon alcohol is compounded with some polyethers, mineral oils, etc. for emulsification to obtain a composite high-carbon alcohol defoamer, but it is easy to have stratification, post-thickening, demulsification and agglomeration, so the state of the preparation process is unstable. Summary of the invention

[0005] The object of the present invention is to provide a high-efficiency defoamer for adhesive silicone grease and a preparation method thereof, aiming to solve the problem that the defoamers in the prior art are mainly emulsified with high-carbon alcohols, and high-carbon alcohols are compounded with some polyethers, mineral oils, etc. for emulsification to obtain a composite high-carbon alcohol defoamer, but stratification, post-thickening, demulsification and agglomeration are prone to occur, so the state of the preparation process is unstable.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: an adhesive silicone grease high-efficiency defoaming agent and a preparation method thereof, comprising raw materials of the following components: 0.2-0.5 parts of side hydrogenated silicone oil, 10-15 parts of terminal vinyl silicone oil, 2-5 parts of dimethyl silicone oil, a trace amount of Karstedt catalyst, 3-5 parts of precipitated silica, 1-3 parts of silicone resin, 4-10 parts of emulsifier, 0.2-2 parts of thickener, 0.2-2 parts of sodium hydroxide solution and 55-80 parts of emulsified water.

[0007] As a preferred adhesive silicone grease high-efficiency defoaming agent of the present invention, the hydrogen-containing silicone oil is a side hydrogen-containing silicone oil with a hydrogen mass percentage of 0.2-2.0%, the vinyl silicone oil is a double-terminal vinyl silicone oil with a vinyl mass percentage of 0.2-2.0%, and the mass concentration of the sodium hydroxide solution is 10%.

[0008] As a preferred high-efficiency defoaming agent for adhesive silicone grease of the present invention, the dimethyl silicone oil is a low-viscosity silicone oil.

[0009] As a preferred high-efficiency defoaming agent for adhesive silicone grease of the present invention, the white carbon black is precipitated white carbon black.

[0010] As a preferred high-efficiency defoaming agent for adhesive silicone grease of the present invention, the silicone resin is MQ type silicone resin.

[0011] As a preferred high-efficiency defoaming agent for adhesive silicone grease of the present invention, the emulsifier includes a nonionic surfactant and an anionic surfactant.

[0012] As a preferred high-efficiency defoaming agent for adhesive silicone grease of the present invention, the thickener includes cellulose and alkali swelling agents.

[0013] As a preferred adhesive silicone grease high-efficiency defoaming agent of the present invention, the non-ionic surfactant is Span, Tween, block polyether, silicone polyether emulsifier, and the anionic surfactant is sodium dodecyl sulfate; the HLB value is selected between 7.0-11.5.

[0014] As a preferred adhesive silicone grease high-efficiency defoaming agent of the present invention, the hydrogen-containing silicone oil and vinyl silicone oil are subjected to the action of a Karstedt catalyst, the C=C double bond in the vinyl silicone oil is opened, the hydrogen-containing silicone oil is grafted onto the vinyl silicone oil, and the molecular structure is changed from a straight chain type to a network structure.

[0015] A method for preparing an adhesive silicone grease high-efficiency defoamer comprises the following steps:

[0016] S1. Weigh the following raw materials in parts by mass: 0.2-0.5 parts of side hydrogenated silicone oil, 10-15 parts of terminal vinyl silicone oil, 2-5 parts of dimethyl silicone oil, trace amounts of Karstedt catalyst, 3-5 parts of precipitated silica, 1-3 parts of silicone resin, 4-10 parts of emulsifier, 0.2-2 parts of thickener, 0.2-2 parts of 10% sodium hydroxide solution by mass concentration, and 55-80 parts of emulsified water;

[0017] S2, add the hydrogen-containing silicone oil, vinyl-terminated silicone oil, dimethyl silicone oil, precipitated silica and silicone resin in parts by weight in S1 into an electric heating tank, heat to 120-220° C., and stir for 1-3 hours to obtain adhesive silicone grease;

[0018] S3, preparing adhesive silicone grease defoamer by adding emulsifier to oil phase method, stirring and mixing the adhesive silicone grease and emulsifier in S2 at 75° C. for 1-2 hours;

[0019] S4, adding emulsified water accounting for 1 / 3-1 / 2 of the above mass parts to the mixture in S3, and emulsifying and stirring at a temperature of 75° C. for 0.5-2 hours to obtain an emulsion;

[0020] S5. The emulsion in S4 is subjected to high shear homogenization or colloid mill homogenization at a temperature below 55°C to make the emulsion particle size be 2-30 μm;

[0021] S6, pouring the above-mentioned mass parts of thickener into the remaining emulsified water at a temperature of 50-60° C. and stirring to dissolve it, adding the above-mentioned mass parts of sodium hydroxide with a mass concentration of 10% and stirring evenly to obtain thickened water;

[0022] S7. Slowly add the thickened water of S6 into the emulsion of S5 while stirring, and keep stirring for 20-30 minutes until the mixture is evenly mixed to obtain the finished product of adhesive silicone grease high-efficiency defoaming agent.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The selection and proportion of the main components of the defoamer are optimized, and during the preparation process, side hydrogen silicone oil and terminal vinyl silicone oil are used for addition reaction under the action of Karstedt catalyst to generate adhesive silicone grease, which is bonded with gas phase silica and silicone resin at high temperature, and then prepared by adding an emulsifier to the oil phase method. The defoamer has the characteristics of fast defoaming speed and strong anti-foaming ability, especially in glass fiber systems and chemical fiber systems, the defoaming and anti-foaming effects are excellent, and no side effects are produced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 It is a schematic diagram of the preparation process of the present invention;

[0027] Figure 2 This is a schematic diagram of the preparation process of the emulsified water adding oil phase method of the present invention. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-2 The present invention provides the following technical scheme: an adhesive silicone grease high-efficiency defoamer and a preparation method thereof, comprising the following raw materials: 0.2-0.5 parts of side hydrogen silicone oil, 10-15 parts of terminal vinyl silicone oil, 2-5 parts of dimethyl silicone oil, a trace amount of Karstedt catalyst, 3-5 parts of precipitated white carbon black, 1-3 parts of silicone resin, 4-10 parts of emulsifier, 0.2-2 parts of thickener, 0.2-2 parts of sodium hydroxide solution and 55-80 parts of emulsified water.

[0030] Preferably: the hydrogen-containing silicone oil is a side hydrogen-containing silicone oil with a hydrogen mass percentage of 0.2-2.0%, the vinyl silicone oil is a double-ended vinyl silicone oil with a vinyl mass percentage of 0.2-2.0%, the mass concentration of the sodium hydroxide solution is 10%, the dimethyl silicone oil is a low-viscosity silicone oil, the white carbon black is a precipitated white carbon black, the silicone resin is an MQ type silicone resin, the emulsifier includes a nonionic surfactant and an anionic surfactant, the thickener includes a cellulose type and an alkali swelling type, the nonionic surfactant is a Span, Tween, a block polyether, and a silicon polyether emulsifier, and the anionic surfactant is sodium dodecyl sulfate; the HLB value is selected between 7.0 and 11.5, and the hydrogen-containing silicone oil and the vinyl silicone oil are treated with a karstedt catalyst, the C=C double bond in the vinyl silicone oil is opened, the hydrogen-containing silicone oil is grafted on the vinyl silicone oil, and the molecular structure is changed from a linear type to a network structure.

[0031] A method for preparing an adhesive silicone grease high-efficiency defoamer comprises the following steps:

[0032] S1. Weigh the following raw materials in parts by mass: 0.2-0.5 parts of side hydrogenated silicone oil, 10-15 parts of terminal vinyl silicone oil, 2-5 parts of dimethyl silicone oil, trace amounts of Karstedt catalyst, 3-5 parts of precipitated silica, 1-3 parts of silicone resin, 4-10 parts of emulsifier, 0.2-2 parts of thickener, 0.2-2 parts of 10% sodium hydroxide solution by mass concentration, and 55-80 parts of emulsified water;

[0033] S2, add the hydrogen-containing silicone oil, vinyl-terminated silicone oil, dimethyl silicone oil, precipitated silica and silicone resin in parts by weight in S1 into an electric heating tank, heat to 120-220° C., and stir for 1-3 hours to obtain adhesive silicone grease;

[0034] S3, preparing adhesive silicone grease defoamer by adding emulsifier to oil phase method, stirring and mixing the adhesive silicone grease and emulsifier in S2 at 75° C. for 1-2 hours;

[0035] S4, adding emulsified water accounting for 1 / 3-1 / 2 of the above mass parts to the mixture in S3, and emulsifying and stirring at a temperature of 75° C. for 0.5-2 hours to obtain an emulsion;

[0036] S5. The emulsion in S4 is subjected to high shear homogenization or colloid mill homogenization at a temperature below 55°C to make the emulsion particle size be 2-30 μm;

[0037] S6, pouring the above-mentioned mass parts of thickener into the remaining emulsified water at a temperature of 50-60° C. and stirring to dissolve it, adding the above-mentioned mass parts of sodium hydroxide with a mass concentration of 10% and stirring evenly to obtain thickened water;

[0038] S7. Slowly add the thickened water of S6 into the emulsion of S5 while stirring, and keep stirring for 20-30 minutes until the mixture is evenly mixed to obtain the finished product of adhesive silicone grease high-efficiency defoaming agent.

[0039] When used specifically, the selection and proportion of the main components of the defoamer are optimized and designed. In the preparation process, the side hydrogen silicone oil and the terminal vinyl silicone oil are used for addition reaction under the action of Karstedt catalyst to generate adhesive silicone grease, which is bonded with gas phase silica and silicone resin at high temperature, and then prepared by adding an emulsifier to the oil phase method. This makes the defoamer have the characteristics of fast defoaming speed and strong anti-foaming ability, especially in glass fiber systems and chemical fiber systems, the defoaming and anti-foaming effects are excellent, and no side effects are produced.

[0040] Embodiment 1:

[0041] See also Figure 1-2 , an adhesive silicone grease defoamer, and its preparation method comprises the following steps:

[0042] 1. Weigh the raw materials according to the following mass parts: 0.2 kg of hydrogenated silicone oil, 15 kg of vinyl-terminated silicone oil, 3 kg of dimethyl silicone oil, 6 ppm of Karstedt catalyst, 2.5 kg of precipitated silica, 1 kg of silicone resin, 4.5 kg of emulsifier, 0.2 kg of thickener, 0.2 kg of 10% sodium hydroxide solution and 70 kg of emulsified water;

[0043] 2. Add 0.2kg of hydrogenated silicone oil, 15kg of vinyl-terminated silicone oil, 3kg of dimethyl silicone oil, 2.5kg of precipitated silica and 1kg of silicone resin into an electric heating tank, heat to 120-220°C and stir for 1-3 hours to obtain adhesive silicone grease;

[0044] 3. Use emulsifier added to water-oil phase method:

[0045] 3-1. Stir and mix the adhesive silicone grease and emulsifier in step 2 at 75°C for 1-2 hours;

[0046] 3-2. Add 35 kg of emulsified water in the raw material to the mixture of step 3-1 and emulsify and stir at 75 ° C for 0.5-2 hours to obtain an emulsion;

[0047] 3-3. The emulsion is subjected to high shear homogenization or colloid mill homogenization at a temperature below 55°C for 0.5-1.0 hours to make the emulsion particle size 2-30um;

[0048] 3-4. Dissolve 0.2 kg of thickener in the raw material in the remaining emulsified water at 50-60 ° C and stir to dissolve, add 0.2 kg of 10% sodium hydroxide and stir evenly to obtain thickened water;

[0049] 3-5. Slowly add the thickened water to the emulsion of step 3-3 while stirring, and keep stirring for 20-30 minutes until the mixture is evenly mixed to obtain the finished product of adhesive silicone grease high-efficiency defoaming agent.

[0050] The above-mentioned hydrogen-containing silicone oil is a side hydrogen-containing silicone oil with a hydrogen content of 0.10% by mass, the vinyl silicone oil is a double-terminal vinyl silicone oil with a vinyl content of 0.2% by mass, the dimethyl silicone oil is a low-viscosity silicone oil, the white carbon black is a precipitated white carbon black, and the silicone resin is an MQ-type silicone resin. MQ-type silicone resin is a special type of silicone resin composed of a tetrafunctional siloxane polycondensation chain segment and a monofunctional siloxane closed chain segment. The molar mass of MQ-type silicone resin is generally 1000 to 8000 g / mol. The molar ratio of the M chain segment in the molecular structure and the structure of the M chain segment determine the properties and application range of the resin. The ratio of n(M) / n(Q) in the MQ silicone resin is selected to be 0.1-1.0, the emulsifier is a Span, Tween, block polyether, silicone polyether nonionic surfactant, and the thickener is an alkali swelling type.

[0051] For example 2, please refer to Figure 1-2 :

[0052] 1. The difference from Example 1 is that: silicone polyether 1#, 2#, 3# are used as emulsifiers, 0.2kg of side hydrogenated silicone oil, 15kg of terminal vinyl silicone oil, 3kg of dimethyl silicone oil, 6ppm of Karstedt catalyst, 2.5kg of precipitated white carbon black, 1kg of silicone resin, 4.5kg of emulsifier, 0.2kg of thickener, 0.2kg of 10% sodium hydroxide solution by mass concentration, and 70kg of emulsified water;

[0053] 2. Add 0.2kg of hydrogenated silicone oil, 15kg of vinyl-terminated silicone oil, 3kg of dimethyl silicone oil, 2.5kg of precipitated silica and 1kg of silicone resin into an electric heating tank, heat to 120-220°C, and stir for 1-3 hours to obtain adhesive silicone grease;

[0054] 3. Use emulsifier added to water-oil phase method:

[0055] 3-1. Stir and mix the adhesive silicone grease and emulsifier in step 2 at 75°C for 1-2 hours;

[0056] 3-2. The above 35 kg of emulsified water was added to the mixture of step 3-1 and stirred at 75 ° C for 0.5-2 hours to obtain an emulsion;

[0057] 3-3. The emulsion is subjected to high shear homogenization or colloid mill homogenization at a temperature below 55°C for 0.5-1.0 hours to make the emulsion particle size 2-30um;

[0058] 3-4. Dissolve the above 0.2 kg thickener in the remaining emulsified water at 50-60 ° C and stir to dissolve, add 0.2 kg of 10% sodium hydroxide by mass concentration and stir evenly to obtain thickened water;

[0059] 3-5. Slowly add the thickened water to the emulsion of step 3-3 while stirring, and keep stirring for 20-30 minutes until the mixture is evenly mixed to obtain the finished product of adhesive silicone grease high-efficiency defoaming agent.

[0060] The above-mentioned hydrogen-containing silicone oil is a side hydrogen-containing silicone oil with a hydrogen content of 0.10% by mass, the vinyl silicone oil is a double-terminal vinyl silicone oil with a vinyl content of 0.2% by mass, the dimethyl silicone oil is a low-viscosity silicone oil, the white carbon black is a precipitated carbon black, the silicone resin is an MQ type silicone resin, the emulsifier is silicone polyether 1#, 2#, 3#, and the thickener is an alkali swelling type.

[0061] For example 3, please refer to Figure 1-2 :

[0062] 1. The difference from Example 1 is that the hydrogen content of the hydrogenated silicone oil is different, and the emulsifier is Span, Tween nonionic surfactant.

[0063] Take 0.4 kg of hydrogenated silicone oil, 15 kg of vinyl-terminated silicone oil, 2 kg of dimethyl silicone oil, 2.5 kg of Karstedt catalyst, 1.5 kg of silicone resin, 7 kg of emulsifier, 0.2 kg of thickener, 0.2 kg of 10% sodium hydroxide solution and 65 kg of emulsified water;

[0064] 2. Add 0.4kg of hydrogenated silicone oil, 15kg of vinyl-terminated silicone oil, 2kg of dimethyl silicone oil, 2.5kg of precipitated white carbon black and 1.5kg of silicone resin into an electric heating tank and heat to 120-220°C. Stir for 1-3 hours to obtain silicone grease.

[0065] 3. Use emulsifier added to water-oil phase method:

[0066] 3-1. Stir and mix the silicone paste and emulsifier in step 2 at 75°C for 1-2 hours;

[0067] 3-2. Add 32.5 kg of emulsified water from the raw material to the mixture of step 3-1 and stir at 75 ° C for 0.5-2 hours to obtain an emulsion;

[0068] 3-3. The emulsion is subjected to high shear homogenization or colloid mill homogenization at a temperature below 55°C for 0.5-1.0 hours to make the emulsion particle size 2-30um;

[0069] 3-4. Dissolve 0.2 kg of the thickener in the raw material in the remaining emulsified water at 50-60 ° C and stir to dissolve, then add 0.2 kg of 10% sodium hydroxide and stir evenly to obtain thickened water;

[0070] 3-5. Slowly add the thickened water to the emulsion of step 3-3 while stirring, and keep stirring for 20-30 minutes until the mixture is evenly mixed to obtain the finished product of adhesive silicone grease high-efficiency defoaming agent.

[0071] The above-mentioned hydrogen-containing silicone oil is a side hydrogen-containing silicone oil with a hydrogen content of 0.18% by mass, the vinyl silicone oil is a double-terminal vinyl silicone oil with a vinyl content of 0.2% by mass, the dimethyl silicone oil is a low-viscosity silicone oil, the white carbon black is precipitated white carbon black, the silicone resin is an MQ type silicone resin, the emulsifier is Span, Tween non-ionic surfactant, and the thickener is an alkali swelling type.

[0072] Example 4, please refer to Figure 1-2 :

[0073] 1. The difference from Example 1 is that the hydrogen content of the side hydrogenated silicone oil is 0.18%, and the thickener is cellulose. Take 0.4 kg of side hydrogenated silicone oil, 15 kg of terminal vinyl silicone oil, 2 kg of dimethyl silicone oil, 6 ppm of Karstedt catalyst, 2.5 kg of precipitated silica, 1.5 kg of silicone resin, 7 kg of emulsifier, 0.5 kg of thickener and 65 kg of emulsified water;

[0074] 2. Add 0.4kg of hydrogenated silicone oil, 15kg of vinyl-terminated silicone oil, 2kg of dimethyl silicone oil, 2.5kg of precipitated silica and 1.5kg of silicone resin into an electric heating tank, heat to 120-220°C, and stir for 1-3 hours to obtain adhesive silicone grease;

[0075] 3. Use emulsifier added to water-oil phase method:

[0076] 3-1. Stir and mix the adhesive silicone grease and emulsifier in step 2 at 75°C for 1-2 hours;

[0077] 3-2. Add 32.5 kg of emulsified water from the raw material to the mixture of step 3-1 and stir at 75 ° C for 0.5-2 hours to obtain an emulsion;

[0078] 3-3. The emulsion is subjected to high shear homogenization or colloid mill homogenization at a temperature below 55°C for 0.5-1.0 hours to make the emulsion particle size 2-30um;

[0079] 3-4. Dissolve the above 0.5 kg thickener in the remaining emulsified water at 50-60°C and stir to obtain thickened water;

[0080] 3-5. Slowly add the thickened water to the emulsion of step 3-3 while stirring, and keep stirring for 20-30 minutes until the mixture is evenly mixed to obtain the finished product of adhesive silicone grease high-efficiency defoaming agent.

[0081] The above-mentioned hydrogen-containing silicone oil is a side hydrogen-containing silicone oil with a hydrogen content of 0.18% by mass, the vinyl silicone oil is a double-terminal vinyl silicone oil with a vinyl content of 0.2% by mass, the dimethyl silicone oil is a low-viscosity silicone oil, the white carbon black is a precipitated white carbon black, the silicone resin is an MQ type silicone resin, the emulsifier is a block polyether nonionic surfactant, and the thickener is a cellulose-based

[0082] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An adhesive silicone grease high-efficiency defoamer, characterized in that: The raw materials include the following ingredients: 0.2-0.5 parts of hydrogenated silicone oil, 10-15 parts of vinyl-terminated silicone oil, 2-5 parts of dimethyl silicone oil, a trace amount of Karstedt catalyst, 3-5 parts of precipitated white carbon black, 1-3 parts of silicone resin, 4-10 parts of emulsifier, 0.2-2 parts of thickener, 0.2-2 parts of sodium hydroxide solution and 55-80 parts of emulsified water.

2. The adhesive silicone grease high-efficiency defoaming agent according to claim 1, characterized in that: The hydrogen-containing silicone oil is a side hydrogen-containing silicone oil with a hydrogen mass percentage of 0.2-2.0%, the vinyl silicone oil is a double-terminal vinyl silicone oil with a vinyl mass percentage of 0.2-2.0%, and the mass concentration of the sodium hydroxide solution is 10%.

3. The adhesive silicone grease high-efficiency defoaming agent according to claim 1, characterized in that: The dimethyl silicone oil is a low-viscosity silicone oil.

4. The adhesive silicone grease high-efficiency defoaming agent according to claim 1, characterized in that: The white carbon black is precipitated white carbon black.

5. The adhesive silicone grease high-efficiency defoaming agent according to claim 1, characterized in that: The silicone resin is MQ type silicone resin.

6. The adhesive silicone grease high-efficiency defoaming agent according to claim 1, characterized in that: The emulsifier includes nonionic surfactant and anionic surfactant.

7. The adhesive silicone grease high-efficiency defoaming agent according to claim 1, characterized in that: The thickener includes cellulose and alkali swelling agents.

8. The adhesive silicone grease high-efficiency defoaming agent according to claim 6, characterized in that: The nonionic surfactant is a Span, a Tween, a block polyether, or a silicone polyether emulsifier; the anionic surfactant is sodium dodecyl sulfate; and the HLB value is selected to be between 7.0 and 11.

5.

9. The adhesive silicone grease high-efficiency defoaming agent according to claim 2, characterized in that: Under the action of Karstedt catalyst, the C=C double bond in the vinyl silicone oil is opened, the hydrogen-containing silicone oil is grafted onto the vinyl silicone oil, and the molecular structure is changed from a straight chain type to a network structure.

10. A method for preparing an adhesive silicone grease high-efficiency defoamer, characterized in that: The following steps are involved: S1. Weigh the following raw materials in parts by mass: 0.2-0.5 parts of side hydrogenated silicone oil, 10-15 parts of terminal vinyl silicone oil, 2-5 parts of dimethyl silicone oil, trace amounts of Karstedt catalyst, 3-5 parts of precipitated silica, 1-3 parts of silicone resin, 4-10 parts of emulsifier, 0.2-2 parts of thickener, 0.2-2 parts of 10% sodium hydroxide solution by mass concentration, and 55-80 parts of emulsified water; S2, add the hydrogen-containing silicone oil, vinyl-terminated silicone oil, dimethyl silicone oil, precipitated silica and silicone resin in parts by weight in S1 into an electric heating tank, heat to 120-220° C., and stir for 1-3 hours to obtain adhesive silicone grease; S3, preparing adhesive silicone grease defoamer by adding emulsifier to oil phase method, stirring and mixing the adhesive silicone grease and emulsifier in S2 at 75° C. for 1-2 hours; S4, adding emulsified water accounting for 1 / 3-1 / 2 of the above mass parts to the mixture in S3, and emulsifying and stirring at a temperature of 75° C. for 0.5-2 hours to obtain an emulsion; S5. The emulsion in S4 is subjected to high shear homogenization or colloid mill homogenization at a temperature below 55°C to make the emulsion particle size be 2-30 μm; S6, pouring the above-mentioned mass parts of thickener into the remaining emulsified water at a temperature of 50-60° C. and stirring to dissolve it, adding the above-mentioned mass parts of sodium hydroxide with a mass concentration of 10% and stirring evenly to obtain thickened water; S7. Slowly add the thickened water of S6 into the emulsion of S5 while stirring, and keep stirring for 20-30 minutes until the mixture is evenly mixed to obtain the finished product of adhesive silicone grease high-efficiency defoaming agent.

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