Preparation method and application of organic silicon composition
By introducing unsaturated bonds into the silicone resin molecular chain to generate silicone-g-polyacrylate graft copolymers, the problem of poor compatibility between silicone resin and vinyl polymer is solved, good compatibility and simplified preparation process are achieved, and high-performance silicone emulsions are produced.
Patent Information
- Application Number
- CN202510681307.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-26
- Publication Date
- 2025-09-19
AI Technical Summary
In the prior art, silicone resins and vinyl polymers have poor compatibility, which leads to stratification and precipitation during application, and the preparation process is complex and costly.
By introducing unsaturated bonds into the silicone resin molecular chain, a free radical polymerization reaction is carried out to generate a silicone-g-polyacrylate (ester) graft copolymer. By combining multiple chemical reactions, good compatibility and homogeneous mixing of the silicone resin and the vinyl polymer are achieved, simplifying the preparation process.
Good compatibility between silicone resin and vinyl polymer is achieved, the preparation process is simplified, the production time is shortened, the cost is reduced, and a high-performance silicone emulsion is produced.
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of organosilicon materials, and in particular relates to a preparation method of an organosilicon composition and application thereof. Background Art
[0002] Foam is a common phenomenon in life and work. However, in industrial production, foam can sometimes cause numerous hazards, such as reduced work efficiency, delayed labor time, and compromised product quality. With the significant increase in industrial scale and production efficiency, defoaming agents are gaining widespread application. Currently, defoamers are widely used in industries such as papermaking, textile printing and dyeing, oil extraction and refining, coatings, emulsion polymerization, wastewater treatment, and metal cleaning, becoming indispensable functional additives in production processes.
[0003] Defoamers are primarily categorized into mineral oil, polyether, and silicone types, depending on their composition. Compared to other defoamers, silicone defoamers are chemically stable, have minimal side effects, and offer excellent defoaming and long-lasting foam suppression even at very low dosages, making them highly popular.
[0004] In existing technologies, the preparation of silicone resins and vinyl polymers typically involves complex chemical reaction processes, including free radical polymerization and condensation reactions. However, these methods often suffer from drawbacks, such as harsh reaction conditions, poor product stability, and poor compatibility. Furthermore, existing methods for preparing silicone emulsions often struggle to control the particle size distribution and stability of the emulsion, which can affect the performance of the final product. Summary of the Invention
[0005] The present invention aims to address the existing problem of poor compatibility between silicone resins and vinyl polymers, which can lead to delamination and precipitation during application. To overcome these drawbacks, the present invention provides a method for preparing an organosilicon composition and its application. Through a series of innovative technical approaches, the method achieves excellent compatibility and homogeneous mixing of the silicone resin and vinyl polymer, while also simplifying the preparation process, shortening production time, and reducing costs.
[0006] The preparation method of the organosilicon composition of the present invention is as follows:
[0007] S1. Using methyl silicone resin as the liquid phase, vinyl silicone resin and hydrogen-containing silicone oil H1 are dissolved in the methyl silicone resin and reacted at 50-80°C for 2-5 hours to obtain reactant A.
[0008] S2. Dissolve hydrogenated silicone oil H2 and acrylate in toluene and react at 20-50°C for 2-5h to obtain reactant B;
[0009] S3. Mix reactants A and B evenly, add silica and homogenize for 0.5-3 hours, then disperse at a high speed of 1500-5000 rpm for 0.5-2 hours to ensure that the mixture is fully mixed.
[0010] S4. Remove toluene from the homogenized mixture at 90° C. to obtain gel C. Perform a high-speed dispersion treatment on gel C to obtain an organosilicon composition having a viscosity of 20,000 to 60,000 mPa.s.
[0011] The hydrogen-containing silicone oil H1 described in the present invention is a hydrogen-containing silicone oil with a hydrogen content of 0.05-0.5%, and its usage accounts for 1-10% of the total mass of the composition.
[0012] The methyl silicone resin of the present invention is a methyl silicone resin with an M to Q ratio of 0.9-1.5, and its usage accounts for 40-60% of the total mass of the composition.
[0013] The vinyl silicone resin of the present invention is a vinyl silicone resin with an M to Q ratio of 0.9-1.5, and its usage accounts for 5-25% of the total mass of the composition.
[0014] The hydrogen-containing silicone oil H2 described in the present invention is a hydrogen-containing silicone oil with a hydrogen content of 0.1-1.5%, and its usage accounts for 1-15% of the total mass of the composition.
[0015] The acrylic acid ester material of the present invention is selected from methyl acrylate, ethyl acrylate, butyl acrylate, isooctyl acrylate, methyl methacrylate, ethyl methacrylate, hydroxyethyl acrylate, and hydroxypropyl acrylate, and its usage accounts for 5-25% of the total mass of the composition.
[0016] The white carbon black of the present invention is selected from hydrophobic fumed white carbon black, and its specific surface area is 50 to 500 m 2 / g, the dosage accounts for 2-10% of the total mass of the defoamer.
[0017] The technical solution of the present invention can achieve the following technical effects:
[0018] (1) Improving the compatibility between silicone resin and vinyl polymer: By introducing unsaturated bonds into the silicone resin molecular chain, silicone resin and vinyl monomer can undergo in-situ graft polymerization during free radical polymerization, generating a certain amount of silicone-g-polyacrylate graft copolymers. These graft copolymers can significantly improve the compatibility between silicone resin and vinyl polymer as compatibilizers;
[0019] (2) Simultaneous conduct of multiple chemical reactions: The present invention realizes the simultaneous conduct of ring-opening polymerization and polycondensation of epoxysilane, organic (cyclic) siloxane containing unsaturated bonds, and free radical polymerization of acrylic (ester) monomers.
[0020] In summary, the technical solution of the present invention successfully addresses the poor compatibility problem of silicone resins and vinyl polymers in the prior art by precisely controlling the raw material ratios, reaction conditions, and processing steps. This achieves excellent compatibility and homogeneous mixing of the silicone resin and vinyl polymer, while also simplifying the preparation process, shortening production time, and reducing costs. This technology can be used to produce high-performance silicone emulsions for a wide range of applications in coatings, adhesives, sealants, defoamers, and other fields. DETAILED DESCRIPTION
[0021] Example 1
[0022] S1. Using methyl silicone resin as the liquid phase, dissolve 20 parts of vinyl silicone resin with an MQ ratio of 0.9 and 2 parts of hydrogenated silicone oil H1 with a hydrogen content of 0.5% in 30 parts of methyl silicone resin with an MQ ratio of 1.2. React at 80°C for 3 hours to obtain reactant A1.
[0023] S2. 15 parts of 0.5% hydrogen-containing silicone oil H2 and 25 parts of methyl acrylate were dissolved in toluene and reacted at 50°C for 4 hours to obtain reactant B1;
[0024] S3. Mix reactants A1 and B1 evenly, add 8 parts of a 250 m 2 / g of hydrophobic fumed silica was homogenized for 3 hours, and then high-speed dispersion was performed at a speed of 2500 rpm for 1.5 hours to ensure that the mixture was fully mixed.
[0025] S4. The homogenized mixture was subjected to a temperature of 90° C. to remove toluene to obtain gel C1. Gel C1 was subjected to a high-speed dispersion treatment to obtain an organosilicon composition having a viscosity of 20,000 mPa.s.
[0026] Example 2
[0027] S1. Using methyl silicone resin as the liquid phase, dissolve 12 parts of vinyl silicone resin with an MQ ratio of 0.9 and 4 parts of hydrogenated silicone oil H1 with a hydrogen content of 0.4% in 58 parts of methyl silicone resin with an MQ ratio of 1.3. React at 50°C for 5 hours to obtain reactant A2.
[0028] S2. 10 parts of 0.8% hydrogen-containing silicone oil H2 and 10 parts of isooctyl acrylate were dissolved in toluene and reacted at 40°C for 5 hours to obtain reactant B2;
[0029] S3. Mix reactants A2 and B2 evenly, add 6 parts of a 300 m 2 / g of hydrophobic fumed silica was homogenized for 2 hours, and then high-speed dispersion was performed at a speed of 3000 rpm for 0.5 hours to ensure that the mixture was fully mixed.
[0030] S4. The homogenized mixture was subjected to a temperature of 90° C. to remove toluene to obtain gel C2. Gel C2 was subjected to a high-speed dispersion treatment to obtain an organosilicon composition having a viscosity of 40,000 mPa.s.
[0031] Example 3
[0032] S1. Using methyl silicone resin as the liquid phase, 15 parts of vinyl silicone resin with an MQ ratio of 1.3 and 8 parts of hydrogenated silicone oil H1 with a hydrogen content of 0.5% were dissolved in 49 parts of methyl silicone resin with an MQ ratio of 1.5. The mixture was reacted at 70°C for 5 hours to obtain reactant A3.
[0033] S2. 8 parts of 1.2% hydrogen-containing silicone oil H2 and 15 parts of hydroxyethyl acrylate were dissolved in toluene and reacted at 30°C for 4 hours to obtain reactant B3;
[0034] S3. Mix reactants A3 and B3 evenly, add 5 parts of a specific surface area of 380 m 2 / g of hydrophobic fumed silica was homogenized for 1 hour, and then high-speed dispersion was performed at a speed of 4000 rpm for 2 hours to ensure that the mixture was fully mixed.
[0035] S4. The homogenized mixture was subjected to removal of toluene at 90° C. to obtain gel C3. Gel C3 was subjected to high-speed dispersion treatment to obtain an organosilicon composition having a viscosity of 50,000 mPa.s.
[0036] Example 4
[0037] S1. Using methyl silicone resin as the liquid phase, 15 parts of vinyl silicone resin with an MQ ratio of 1.3 and 10 parts of hydrogenated silicone oil H1 with a hydrogen content of 0.3% were dissolved in 50 parts of methyl silicone resin with an MQ ratio of 1.1. The mixture was reacted at 60°C for 4 hours to obtain reactant A4.
[0038] S2. Dissolve 1 part of 1.5% hydrogen-containing silicone oil H2 and 22 parts of ethyl methacrylate in toluene and react at 30°C for 3 hours to obtain reactant B4;
[0039] S3. Mix reactants A4 and B4 evenly, add 2 parts of a 500 m 2 / g of hydrophobic fumed silica was homogenized for 1.5h, and then high-speed dispersion was performed at a speed of 4500rpm for 0.5h to ensure that the mixture was fully mixed.
[0040] S4. The homogenized mixture was subjected to removal of toluene at 90° C. to obtain gel C4. Gel C4 was subjected to high-speed dispersion treatment to obtain an organosilicon composition having a viscosity of 42,000 mPa.s.
[0041] Example 5
[0042] S1. Using methyl silicone resin as the liquid phase, 20 parts of vinyl silicone resin with an MQ ratio of 1.5 and 7 parts of hydrogenated silicone oil H1 with a hydrogen content of 0.05% were dissolved in 60 parts of methyl silicone resin with an MQ ratio of 0.9. The mixture was reacted at 50°C for 3 hours to obtain reactant A5.
[0043] S2. 3 parts of 1.3% hydrogen-containing silicone oil H2 and 5 parts of methyl methacrylate were dissolved in toluene and reacted at 50°C for 2h to obtain reactant B5;
[0044] S3. Mix reactants A5 and B5 evenly, add 5 parts of a 400 m 2 / g of hydrophobic fumed silica was homogenized for 2 hours, and then high-speed dispersion was performed at a speed of 5000 rpm for 1 hour to ensure that the mixture was fully mixed.
[0045] S4. The homogenized mixture was subjected to a temperature of 90° C. to remove toluene to obtain gel C5. Gel C5 was subjected to a high-speed dispersion treatment to obtain an organosilicon composition having a viscosity of 28,000 mPa.s.
[0046] Example 6
[0047] S1. Using methyl silicone resin as the liquid phase, dissolve 25 parts of vinyl silicone resin with an MQ ratio of 1.4 and 9 parts of hydrogenated silicone oil H1 with a hydrogen content of 0.1% in 38 parts of methyl silicone resin with an MQ ratio of 1. The mixture was reacted at 80°C for 2 hours to obtain reactant A6.
[0048] S2. 7 parts of 0.1% hydrogen-containing silicone oil H2 and 18 parts of butyl acrylate were dissolved in toluene and reacted at 50°C for 2h to obtain reactant B6;
[0049] S3. Mix reactants A6 and B6 evenly, add 3 parts of a 200 m 2 / g of hydrophobic fumed silica was homogenized for 1.5h, and then high-speed dispersion was performed at a speed of 2000rpm for 1h to ensure that the mixture was fully mixed.
[0050] S4. The homogenized mixture was subjected to a temperature of 90° C. to remove toluene to obtain gel C6. Gel C6 was subjected to a high-speed dispersion treatment to obtain an organosilicon composition having a viscosity of 20,000 mPa.s.
[0051] Example 7
[0052] S1. Using methyl silicone resin as the liquid phase, 5 parts of vinyl silicone resin with an MQ ratio of 1 and 1 part of hydrogenated silicone oil H1 with a hydrogen content of 0.26% were dissolved in 51 parts of methyl silicone resin with an MQ ratio of 1.2. The reaction was carried out at 60°C for 3 hours to obtain reactant A7.
[0053] S2. 12 parts of 0.2% hydrogen-containing silicone oil H2 and 25 parts of methyl acrylate were dissolved in toluene and reacted at 40°C for 3h to obtain reactant B7;
[0054] S3. Mix reactants A7 and B7 evenly, add 6 parts of a specific surface area of 120 m 2 / g of hydrophobic fumed silica was homogenized for 0.5h, and then high-speed dispersion was performed at a speed of 1500rpm for 0.5h to ensure that the mixture was fully mixed.
[0055] S4. The homogenized mixture was subjected to a temperature of 90° C. to remove toluene to obtain gel C7. Gel C7 was subjected to a high-speed dispersion treatment to obtain an organosilicon composition having a viscosity of 31,000 mPa.s.
[0056] Example 8
[0057] S1. Using methyl silicone resin as the liquid phase, 10 parts of vinyl silicone resin with an MQ ratio of 1.2 and 5 parts of hydrogenated silicone oil H1 with a hydrogen content of 0.45% were dissolved in 45 parts of methyl silicone resin with an MQ ratio of 1. The reaction was carried out at 80°C for 4 hours to obtain reactant A8.
[0058] S2. 11 parts of 1.5% hydrogen-containing silicone oil H2 and 22 parts of ethyl acrylate were dissolved in toluene and reacted at 28°C for 5 hours to obtain reactant B8;
[0059] S3. Mix reactants A8 and B8 evenly, add 7 parts of a specific surface area of 50 m 2 / g of hydrophobic fumed silica was homogenized for 2.5 hours, and then high-speed dispersion was performed at a speed of 2500 rpm for 1.5 hours to ensure that the mixture was fully mixed.
[0060] S4. The homogenized mixture was subjected to a temperature of 90° C. to remove toluene to obtain gel C8. Gel C8 was subjected to a high-speed dispersion treatment to obtain an organosilicon composition having a viscosity of 60,000 mPa.s.
[0061] Comparative Example 1
[0062] S1. Using methyl silicone resin as the liquid phase, dissolve 20 parts of vinyl silicone resin with an MQ ratio of 0.9 and 2 parts of hydrogenated silicone oil H1 with a hydrogen content of 0.5% in 30 parts of methyl silicone resin with an MQ ratio of 0.5. React at 80°C for 3 hours to obtain reactant A1.
[0063] S2. 15 parts of 0.5% hydrogen-containing silicone oil H2 and 25 parts of methyl acrylate were dissolved in toluene and reacted at 50°C for 4 hours to obtain reactant B1;
[0064] S3. Mix reactants A1 and B1 evenly, add 8 parts of a 250 m 2 / g of hydrophobic fumed silica was homogenized for 3 hours, and then high-speed dispersion was performed at a speed of 2500 rpm for 1.5 hours to ensure that the mixture was fully mixed.
[0065] S4. The homogenized mixture was subjected to a temperature of 90° C. to remove toluene to obtain gel C1. Gel C1 was subjected to a high-speed dispersion treatment to obtain an organosilicon composition having a viscosity of 20,000 mPa.s.
[0066] Comparative Example 2
[0067] S1. Using methyl silicone resin as the liquid phase, dissolve 12 parts of vinyl silicone resin with an MQ ratio of 2 and 4 parts of hydrogenated silicone oil H1 with a hydrogen content of 0.4% in 58 parts of methyl silicone resin with an MQ ratio of 1.3. React at 50°C for 5 hours to obtain reactant A2.
[0068] S2. 10 parts of 0.8% hydrogen-containing silicone oil H2 and 10 parts of isooctyl acrylate were dissolved in toluene and reacted at 40°C for 5 hours to obtain reactant B2;
[0069] S3. Mix reactants A2 and B2 evenly, add 6 parts of a 300 m 2 / g of hydrophobic fumed silica was homogenized for 2 hours, and then high-speed dispersion was performed at a speed of 3000 rpm for 0.5 hours to ensure that the mixture was fully mixed.
[0070] S4. The homogenized mixture was subjected to a temperature of 90° C. to remove toluene to obtain gel C2. Gel C2 was subjected to a high-speed dispersion treatment to obtain an organosilicon composition having a viscosity of 40,000 mPa.s.
[0071] Comparative Example 3
[0072] S1. Using methyl silicone resin as the liquid phase, 15 parts of vinyl silicone resin with an MQ ratio of 1.3 and 8 parts of hydrogenated silicone oil H1 with a hydrogen content of 0.02% were dissolved in 49 parts of methyl silicone resin with an MQ ratio of 1.5. The mixture was reacted at 70°C for 5 hours to obtain reactant A3.
[0073] S2. 8 parts of 1.2% hydrogen-containing silicone oil H2 and 15 parts of hydroxyethyl acrylate were dissolved in toluene and reacted at 30°C for 4 hours to obtain reactant B3;
[0074] S3. Mix reactants A3 and B3 evenly, add 5 parts of a specific surface area of 380 m 2 / g of hydrophobic fumed silica was homogenized for 1 hour, and then high-speed dispersion was performed at a speed of 4000 rpm for 2 hours to ensure that the mixture was fully mixed.
[0075] S4. The homogenized mixture was subjected to removal of toluene at 90° C. to obtain gel C3. Gel C3 was subjected to high-speed dispersion treatment to obtain an organosilicon composition having a viscosity of 50,000 mPa.s.
[0076] Comparative Example 4
[0077] S1. Using methyl silicone resin as the liquid phase, 15 parts of vinyl silicone resin with an MQ ratio of 1.3 and 10 parts of hydrogenated silicone oil H1 with a hydrogen content of 0.3% were dissolved in 50 parts of methyl silicone resin with an MQ ratio of 1.1. The mixture was reacted at 60°C for 4 hours to obtain reactant A4.
[0078] S2. 1 part of hydrogenated silicone oil H2 with a hydrogen content of 0.05% and 22 parts of ethyl methacrylate were dissolved in toluene and reacted at 30°C for 3 hours to obtain reactant B4;
[0079] S3. Mix reactants A4 and B4 evenly, add 2 parts of a 500 m 2 / g of hydrophobic fumed silica was homogenized for 1.5h, and then high-speed dispersion was performed at a speed of 4500rpm for 0.5h to ensure that the mixture was fully mixed.
[0080] S4. The homogenized mixture was subjected to removal of toluene at 90° C. to obtain gel C4. Gel C4 was subjected to high-speed dispersion treatment to obtain an organosilicon composition having a viscosity of 42,000 mPa.s.
[0081] Comparative Example 5
[0082] S1. Using methyl silicone resin as the liquid phase, dissolve 20 parts of vinyl silicone resin with an MQ ratio of 1.5 and 7 parts of hydrogenated silicone oil H1 with a hydrogen content of 1.3% in 60 parts of methyl silicone resin with an MQ ratio of 0.9. React at 50°C for 3 hours to obtain reactant A5.
[0083] S2. 3 parts of 0.05% hydrogen-containing silicone oil H2 and 5 parts of methyl methacrylate were dissolved in toluene and reacted at 50°C for 2h to obtain reactant B5;
[0084] S3. Mix reactants A5 and B5 evenly, add 5 parts of a 400 m 2 / g of hydrophobic fumed silica was homogenized for 2 hours, and then high-speed dispersion was performed at a speed of 5000 rpm for 1 hour to ensure that the mixture was fully mixed.
[0085] S4. The homogenized mixture was subjected to a temperature of 90° C. to remove toluene to obtain gel C5. Gel C5 was subjected to a high-speed dispersion treatment to obtain an organosilicon composition having a viscosity of 28,000 mPa.s.
[0086] Comparative Example 6
[0087] S1. Using methyl silicone resin as the liquid phase, dissolve 25 parts of vinyl silicone resin with an MQ ratio of 1.4 and 9 parts of hydrogenated silicone oil H1 with a hydrogen content of 0.1% in 38 parts of methyl silicone resin with an MQ ratio of 1. The mixture was reacted at 80°C for 2 hours to obtain reactant A6.
[0088] S2. 7 parts of 0.1% hydrogen-containing silicone oil H2 and 18 parts of butyl acrylate were dissolved in toluene and reacted at 50°C for 2h to obtain reactant B6;
[0089] S3. Mix reactants A6 and B6 evenly, add 3 parts of a 200 m 2 / g of hydrophobic fumed silica was dispersed at high speed at a speed of 2000 rpm for 1 hour to ensure that the mixture was fully mixed.
[0090] S4. The homogenized mixture was subjected to a temperature of 90° C. to remove toluene to obtain gel C6. Gel C6 was subjected to a high-speed dispersion treatment to obtain an organosilicon composition having a viscosity of 20,000 mPa.s.
[0091] Performance Testing
[0092] According to the prior art, the organosilicon compositions obtained in the above examples and comparative examples were prepared into organosilicon emulsions. The preparation method is as follows:
[0093] At room temperature, 40 parts of a silicone composition, 8 parts of sorbitan trioleate and 12 parts of polyoxyethylene oleate were fully mixed under stirring for 40 minutes. After completion, the temperature of the system was raised to 80°C. Then, while maintaining the system temperature, 40 parts of water were slowly added, and the stirring speed was increased to change the emulsion from an oil-in-water emulsion to an oil-in-water emulsion. 20 parts of water were further added to a mass concentration of 50%, and the mixture was further emulsified through a colloid mill. Finally, the mixture was diluted with an aqueous solution of an acrylic thickener to a solid content of 30% to obtain the corresponding silicone emulsion defoamer.
[0094] 1. Compatibility test:
[0095] Add 0.5% defoaming agent to a 0.2% mass fraction of sodium dodecylbenzenesulfonate solution, take 100g and place it in a sample bottle. After shaking, let it stand and visually observe the state of the silicone emulsion. The higher the grade, the worse the compatibility.
[0096] Visual inspection according to the following scale:
[0097] grade state 1# No precipitation or stratification 2# Small siloxane precipitation on the surface or wall 3# Large siloxane precipitation on the surface or wall 4# There are clusters of siloxane precipitated on the surface or wall
[0098] The test results are as follows:
[0099] sample One week Two weeks Four weeks Eight weeks Example 1 1# 1# 1# 1# Example 2 1# 1# 1# 1# Example 3 1# 1# 1# 1# Example 4 1# 1# 1# 1# Example 5 1# 1# 1# 1# Example 6 1# 1# 1# 1# Example 7 1# 1# 1# 1# Example 8 1# 1# 1# 1# Comparative Example 1 2# 2# 2# 3# Comparative Example 2 2# 2# 2# 3# Comparative Example 3 2# 2# 3# 4# Comparative Example 4 2# 2# 3# 4# Comparative Example 5 2# 2# 3# 4# Comparative Example 6 2# 2# 3# 4#
Claims
1. A method for preparing an organosilicon composition, characterized in that: The specific steps are as follows: S1. Using methyl silicone resin as the liquid phase, vinyl silicone resin and hydrogen silicone oil H1 are dissolved in methyl silicone resin, reacted at 50-80 ° C for 2-5h to obtain reactant A; S2. Dissolve hydrogenated silicone oil H2 and acrylate in toluene and react at 20-50°C for 2-5h to obtain reactant B; S3 reactants A and B were mixed, adding silica and homogenized, homogenization time 0.5-3h, after high-speed dispersion, at a speed of 1500-5000rpm conditions, dispersed 0.5-2h, so that the mixture is thoroughly mixed; S4. Remove toluene from the homogenized mixture at 90° C. to obtain gel C. Perform a high-speed dispersion treatment on gel C to obtain an organosilicon composition having a viscosity of 20,000 to 60,000 mPa.s.
2. A method for preparing an organosilicon composition according to claim 1, characterized in that: The vinyl silicone resin is a vinyl silicone resin with an M to Q ratio of 0.9-1.5, and its usage accounts for 5-25% of the total mass of the composition.
3. A method for preparing an organosilicon composition according to claim 1, characterized in that: The hydrogen-containing silicone oil H1 is a hydrogen-containing silicone oil with a hydrogen content of 0.05-0.5%, and its usage accounts for 1-10% of the total mass of the composition.
4. A method for preparing an organosilicon composition according to claim 1, characterized in that: The methyl silicone resin is a methyl silicone resin with an M to Q ratio of 0.9-1.5, and its usage accounts for 40-60% of the total mass of the composition.
5. A method for preparing an organosilicon composition according to claim 1, characterized in that: The hydrogen-containing silicone oil H2 is a hydrogen-containing silicone oil with a hydrogen content of 0.1-1.5%, and its usage accounts for 1-15% of the total mass of the composition.
6. A method for preparing an organosilicon composition according to claim 1, characterized in that: The acrylic acid ester substance is selected from methyl acrylate, ethyl acrylate, butyl acrylate, isooctyl acrylate, methyl methacrylate, ethyl methacrylate, hydroxyethyl acrylate, and hydroxypropyl acrylate, and the amount used accounts for 5-25% of the total mass of the composition.
7. A method for preparing an organosilicon composition according to claim 1, characterized in that: The white carbon black is selected from hydrophobic fumed white carbon black, and its specific surface area is 50 to 500 m 2 / g, the dosage accounts for 2-10% of the total mass of the defoamer.