CN-121991369-A - Silicone oil with strong adsorptivity to organic pigment and preparation method thereof

Abstract

The invention discloses silicone oil with strong adsorptivity to organic pigment, which comprises, by weight, 1-2 parts of a silane coupling agent, 0.5-1 part of succinic anhydride, 6-10 parts of dimethyl silicone oil and 0.01-0.05 part of a catalyst, wherein the silane coupling agent is any one of gamma-aminopropyl triethoxysilane, gamma-glycidoxypropyl trimethoxysilane and gamma- (methacryloyloxy) propyl trimethoxysilane, and the catalyst is any one of potassium carbonate, platinum catalyst and zinc carbonate. The carboxyl modified nano particles are added to improve the adsorption capacity of the silicone oil so as to greatly improve the adsorption capacity of the organic pigment, meanwhile, the modified nano particles are used for further modifying the silicone oil so as to improve the controllability of the whole reaction process, the effects of high efficiency, less byproducts and more controllable grafting of the nano particles and the silicone oil are achieved, and the thermal stability can be improved by adding the carboxyl modified nano particles.

Inventors

• CHEN YUANQI
• WANG XI
• SI KUNLI
• TANG YIPING
• ZHANG JINHONG
• LIU JUN
• ZHENG YONG

Assignees

• 株洲时代橡塑元件开发有限责任公司
• 中国航发湖南动力机械研究所

Dates

Publication Date

20260508

Application Date

20260119

Claims (9)

1. 1. The silicone oil with strong adsorptivity to organic pigment is characterized by comprising, by weight, 1-2 parts of a silane coupling agent, 0.5-1 part of succinic anhydride, 6-10 parts of dimethyl silicone oil and 0.01-0.05 part of a catalyst, wherein the silane coupling agent is any one of gamma-aminopropyl triethoxysilane, gamma-glycidoxypropyl trimethoxysilane and gamma- (methacryloyloxy) propyl trimethoxysilane, and the catalyst is any one of potassium carbonate, platinum catalyst and zinc carbonate.
2. 2. A method for preparing the silicone oil having strong adsorptivity to organic pigment according to claim 1, comprising the steps of: s1, weighing a silane coupling agent and succinic anhydride according to a proportion, respectively placing the silane coupling agent and the succinic anhydride into a flask, wherein the vacuum dehydration pressure is minus 0.05MPa to minus 0.1MPa, and the temperature is 90 ℃ to 120 ℃, and reacting for 2 hours to 4 hours; S2, dispersing nano-grade silicon dioxide powder in absolute ethyl alcohol, wherein the mass ratio of the nano-grade silicon dioxide powder is 0.1% -0.5%, stirring for 15-25 min after adding, adding the silane coupling agent with carboxyl, and stirring for 6-8 h at the temperature of 90-100 ℃ to enable the silane coupling agent to react with silicon hydroxyl on the surface of silicon dioxide; S3, centrifuging after the reaction is finished, washing the reaction product with unreacted carboxylic acid, adjusting the temperature to 50-80 ℃ and vacuum drying the reaction product under the vacuum degree of-0.08-0.1 MPa to obtain modified silicon dioxide powder; S4, mixing the modified silicon dioxide powder with the simethicone, adding a catalyst and a solvent, and stirring for 1-3 hours at 80-120 ℃ under the pressure of-0.05-0.1 MPa to obtain the modified nano material grafted structure.
3. 3. The method for preparing silicone oil with strong adsorptivity to organic pigment according to claim 2, wherein the step S1 is characterized in that the silane coupling agent with carboxyl is prepared by mixing the silane coupling agent with carboxyl after dehydration in an oil bath at 80-90 ℃ and heating for 1.5-3 h.
4. 4. The method for producing silicone oil having high adsorptivity to organic pigment according to claim 2, wherein the amount of the silane coupling agent having a carboxyl group added in step S2 is 2% -5% of the total amount of the nano-sized silica powder and absolute ethyl alcohol.
5. 5. The method for producing silicone oil having high adsorptivity to organic pigment according to claim 2, wherein the purity of absolute ethyl alcohol in step S2 is 90% -99%.
6. 6. The method for producing silicone oil having high adsorptivity to organic pigment according to claim 2, wherein the mass ratio of the modified silica powder to the simethicone is 1 to 5:95 to 99.
7. 7. The method for preparing silicone oil with strong adsorptivity to organic pigment according to claim 6, wherein the catalyst is any one of potassium carbonate, platinum catalyst and zinc carbonate, the solvent is any one of toluene and xylene, the addition amount of the solvent is 1% -2% of that of the solvent, and the addition amount of the solvent is 1% -3 times of the total mass of the modified silica powder and the dimethyl silicone oil.
8. 8. The method for producing silicone oil having high adsorptivity to organic pigment according to claim 2, wherein the centrifugation in step S3 is performed 2 to 3 times at a centrifugation speed of 10000rpm to 15000rpm for 10 to 30 minutes.
9. 9. The method for preparing silicone oil with strong adsorptivity to organic pigment according to claim 2, wherein the drying temperature in step S3 is 50 ℃ to 80 ℃ and the time is 30min to 60min.

Description

Silicone oil with strong adsorptivity to organic pigment and preparation method thereof Technical Field The invention relates to a preparation method of silicone oil, in particular to silicone oil with strong adsorptivity to organic pigment and a preparation method thereof. Background The silicone oil is used as an important chemical raw material, and is widely applied to the fields of aviation, aerospace, lubrication, shock absorption and the like by virtue of unique physical and chemical properties. However, conventional silicone oils tend to be single in color, and it is difficult to meet the market demand for diversified, personalized products. Therefore, the development of the silicone oil color-changing technology becomes one of the hot spots in the industry, and the occurrence of the color change of the silicone oil marks an important step for the technical innovation in the field. Methyl silicone oil is used as an organosilicon polymer with a silicon-oxygen bond as a main chain, and occupies a place in a plurality of industrial fields due to the excellent heat resistance, cold resistance, electrical insulation, lubricity and chemical stability. However, with the progress of technology and the diversification of demands, the functionality of traditional silicone oils gradually reveals limitations, which prompt scientists to continuously explore ways of modifying them. The existing carboxyl silicone oil prepared is single in color, and with the emerging market, the needs of diversified and personalized products are difficult to meet. Certain fields require that the appearance, heat resistance, weather resistance, oxidation resistance and the like of the organosilicon have more excellent properties. Therefore, the development of the silicone oil color-changing technology becomes one of the hot spots in the industry, and the appearance of the silicone oil color-changing patent marks an important step for the technical innovation in the field. Because methyl silicone oil has strong stability, most of the silicone oil color-changing market is added with dye or pigment, the silicone oil has poorer self-adsorptivity and often poor dispersion effect, and the problems of uneven color, precipitation and the like of products are easily caused. To overcome this limitation, a method of modifying silicone oil is continuously being explored to improve its adsorption capacity. ‌ A Disclosure of Invention The invention discloses silicone oil with strong adsorption capacity to organic pigment and a preparation method thereof, aiming at the problems that the current silicone oil has poor adsorption capacity to color paste, a structure is difficult to control, byproducts are more, thermal stability is poor and the like, the adsorption capacity of the silicone oil is improved by adding carboxyl modified nano particles, so that the aim of greatly improving the adsorption capacity to the organic pigment is fulfilled, meanwhile, the controllability of the whole reaction process is improved by modifying the nano particles to further modify the silicone oil, the effects of high efficiency, less byproducts and more controllable grafting of the nano particles and the silicone oil are fulfilled, and the thermal stability can be improved by adding the carboxyl modified nano particles. The preparation method of the silicone oil with strong adsorptivity to organic pigment specifically relates to a novel method for preparing special nano materials and grafting the special nano materials with the silicone oil, and the silicon dioxide has wide application in the field of material science due to excellent physicochemical properties, such as high specific surface area, good thermal stability and chemical stability. However, the hydrophilicity of its surface and the difficulty of dispersion in organic media limit its range of applications. Through chemical grafting modification, silicone oil is grafted on the surface of silicon dioxide, so that the lipophilicity of the silicone oil can be improved, the compatibility of the silicone oil and organic material dyes can be improved, and the color gamut of the silicone oil and other application fields can be widened. The invention adopts the technical means for solving the problems that: The silicone oil with strong adsorptivity to organic pigment comprises, by weight, 1-2 parts of a silane coupling agent, 0.5-1 part of succinic anhydride, 6-10 parts of dimethyl silicone oil and 0.01-0.05 part of a catalyst, wherein the silane coupling agent is any one of gamma-aminopropyl triethoxysilane, gamma-glycidoxypropyl trimethoxysilane and gamma- (methacryloyloxy) propyl trimethoxysilane, and the catalyst is any one of potassium carbonate, platinum catalyst and zinc carbonate. According to the silicone oil with strong organic pigment adsorptivity, the silane coupling agent, the succinic anhydride, the dimethyl silicone oil and the catalyst are reasonably proportioned, and the silane coupling agent KH-