Tertiary amino polysiloxane and preparation method thereof, quaternized long alkyl polysiloxane and preparation method thereof, emulsion containing quaternized long alkyl polysiloxane and application

Abstract

The invention provides tertiary amine polysiloxane and a preparation method thereof, quaternized long alkyl polysiloxane and a preparation method thereof, an emulsion containing the quaternized long alkyl polysiloxane and application of the quaternized long alkyl polysiloxane. The preparation method of the tertiary amine polysiloxane comprises the following steps: carrying out hydrosilylation reaction on hydrogen-containing polysiloxane and a tertiary amine functionalized unsaturated monomer under the action of an MOF modified platinum catalyst; the temperature of the hydrosilylation reaction is 60 to 100 DEG C, and the time of the hydrosilylation reaction is 2 to 12 hours. The preparation method of the quaternized long alkyl polysiloxane comprises the following step: carrying out substitution reaction on tertiary amino polysiloxane and long-chain halogenated alkane under a solvent-free condition to obtain the quaternized long alkyl polysiloxane. The cationic polysiloxane emulsion is prepared from the following components in percentage by weight: 15 to 50 percent of quaternized polysiloxane and the balance of water. The cationic polysiloxane emulsion is especially suitable for fabric finishing, and can endow the fabric with excellent softness, fluffy feeling, antistatic property and antibacterial property.

Description

Technical Field

[0001] The present invention belongs to the technical field of fine chemicals, and in particular relates to tertiary amino polysiloxane and a preparation method thereof, quaternized long alkyl polysiloxane and a preparation method thereof, and an emulsion containing the same and applications thereof. Background Art

[0002] Cationic silicone oil emulsions typically refer to silicone emulsions modified with quaternary ammonium groups. Due to their excellent fiber affinity, they are widely used in textile softening and leather finishing, among other applications. However, with the increasing demand for functionalization in textiles and leather products, multifunctional finishing agents that combine softening, antistatic, hydrophobic, and antimicrobial properties have become a hot topic in the industry. While traditional cationic silicone oil emulsions can improve the feel of fabrics, their hydrophobicity and antimicrobial properties are often limited by their molecular structure design. While the addition of small molecule quaternary ammonium salts can impart antimicrobial properties to materials, conventional small molecule quaternary ammonium salts suffer from issues such as easy migration, poor washability, and residual toxicity, limiting their long-term application in high-end textiles. Furthermore, the relatively limited functionality of traditional cationic silicone oil emulsions makes it difficult to meet the high-performance, multifunctional demands of the modern consumer market. Furthermore, traditional cationic silicone oil emulsions suffer from insufficient stability, which can lead to performance degradation during application.

[0003] In the prior art, the synthesis of organosilicon quaternary ammonium salts mostly adopts the nucleophilic substitution reaction mechanism of haloalkylsilane and tertiary amine, but this type of reaction is affected by steric hindrance, resulting in low productive rate, many by-products, and the product molecular chain lacks the synergistic modification of long alkyl groups, making it difficult to balance antimicrobial properties and hydrophobicity. Although commercial organosilicon quaternary ammonium salt products such as DC-5700 have long alkyl groups and are chemically bonded to fiber by methoxy hydrolysis, their synthesis requires the use of methanol solvent, which not only has the defects of toxicity and process complexity, but also has single functionality. In recent years, researchers have attempted to improve performance by introducing epoxy groups or aminosilicone oil modification, such as the patent for publication number CN103387588A, which adopts epoxy quaternary ammonium salt intermediates to reduce reaction steric hindrance, but the organosilicon quaternary ammonium salts of these small molecules are still faced with the problems of insufficient emulsion stability, low functional integration, etc.

[0004] Partha Majumdar and other scholars proposed a method for preparing PMHS-PDMS copolymers, but this method requires the use of platinum oxide as a catalyst, which requires a high addition amount, is costly, and affects the appearance of the product.

[0005] In view of the above bottlenecks, there is an urgent need to develop a method for preparing organosilicon quaternary ammonium salts with low energy consumption, high yield and economy, as well as to provide a green and environmentally friendly method for preparing quaternized long alkyl polysiloxanes. Summary of the Invention

[0006] In response to the deficiencies in the prior art, the present invention provides a tertiary amino polysiloxane and a preparation method thereof, a quaternized long alkyl polysiloxane and a preparation method thereof, an emulsion containing the quaternized long alkyl polysiloxane, and applications of the emulsion containing the quaternized long alkyl polysiloxane. The present invention utilizes porous MOF nanoparticles to modify a platinum catalyst. The resulting modified platinum catalyst retains high catalytic activity in an alkaline environment and is capable of promoting the hydrosilylation reaction of the hydrogenated silicone oil and the tertiary amine-functionalized unsaturated monomer described in the present invention. The preparation method of the quaternized long alkyl polysiloxane provided by the present invention utilizes a MOF-modified platinum catalyst, enabling a direct reaction of the tertiary amine-functionalized unsaturated monomer and the hydrogenated silicone oil with a high yield. This method is characterized by low energy consumption, economy, and environmental friendliness. Furthermore, the long-chain quaternary ammonium salt cationic polysiloxane emulsion provided by the present invention exhibits excellent yellowing resistance and high-temperature resistance, making it suitable for use in fields such as textiles, leather, and coatings, and possessing significant practical application value. In addition, the emulsion exhibits outstanding stability, including acid and alkali resistance, electrolyte resistance and shear resistance, and is suitable for a variety of textile processing conditions.

[0007] To achieve this object, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a method for preparing a tertiary amino polysiloxane, the method comprising the following steps: The hydrogen-containing polysiloxane and the tertiary amine functionalized unsaturated monomer are subjected to a hydrosilylation reaction under the action of MOF-modified platinum catalyst to obtain tertiary amino polysiloxane; The temperature of the hydrosilylation reaction is 60-100° C., and the time of the hydrosilylation reaction is 2-12 hours.

[0008] Hydrogenated polysiloxane and tertiary amine-functionalized unsaturated monomers serve as the primary reaction monomers, while a MOF-modified platinum catalyst is used to regulate the reaction activity. The quaternized long alkyl polysiloxane prepared using this method contains few byproducts and exhibits excellent softness, hydrophobicity, antistatic properties, antibacterial properties, yellowing resistance, and excellent hand feel.

[0009] Preferably, the MOF-modified platinum catalyst is prepared by the following preparation method: reacting a platinum catalyst with a phenyl-containing organosilicon compound to generate a platinum catalyst precursor; and modifying the platinum catalyst precursor with a metal organic framework compound to obtain the MOF-modified platinum catalyst.

[0010] Preferably, the metal organic framework compound comprises a zeolite imidazolate framework compound, more preferably a zeolite imidazolate framework ZIF-8.

[0011] Preferably, the modification treatment comprises the following steps: stirring the platinum catalyst precursor and the metal organic framework compound to react, then performing ultrasonic treatment, and finally performing high temperature activation.

[0012] Preferably, the phenyl-containing organosilicon compound includes 1,3-diphenyltetramethyldisiloxane.

[0013] More preferably, the reaction time is 8 to 24 hours.

[0014] More preferably, the stirring reaction time is 2 to 4 hours, the ultrasonic treatment time is 0.5 to 2 hours, and the high-temperature activation time is 1 to 3 hours.

[0015] Further preferably, the molar ratio between the platinum catalyst and the phenyl-containing organosilicon compound is 1:(1.2-4).

[0016] Preferably, the mass ratio between the platinum catalyst precursor and the metal organic framework compound is 1:4-8.

[0017] More preferably, the MOF-modified platinum catalyst is prepared by the following preparation method: a platinum catalyst is reacted with a phenyl-containing organosilicon compound in a first solvent to generate a platinum catalyst precursor; the platinum catalyst precursor is dispersed in a second solvent, and then mixed with a metal organic framework compound, ultrasonicated, centrifuged, dried and activated at high temperature to obtain the MOF-modified platinum catalyst.

[0018] Further preferably, the first solvent is methanol and the second solvent is toluene.

[0019] More preferably, the zeolite-like imidazolate framework is prepared by the following preparation method: 2-ethylimidazole is reacted with zinc nitrate in methanol to generate metal organic framework MOF (ZIF-8) nanoparticles.

[0020] More preferably, the molar ratio of the 2-ethylimidazole to the zinc nitrate is 1:(4-8).

[0021] More preferably, the reaction time is 24 to 48 h.

[0022] More preferably, the reaction temperature is room temperature.

[0023] Preferably, the molar ratio of the hydrogen-containing polysiloxane, the tertiary amine functionalized unsaturated monomer, and the catalyst is 1: (1.05-45): (5×10 -6 ~5×10 -4 ).

[0024] Among them, (1.05~45) can take values ​​of 1.1, 1.5, 2, 3, 5, 8, 10, 15, 20, 24, 30, 32, 35, 36, 40, 42, 45, etc.

[0025] Among them, (5×10 -6 ~5×10 -4 ) can be taken as 6×10 -6 , 8×10 -6 , 9×10 -6 , 1×10 -5 , 3×10 -5 , 5×10 -5 , 8×10 -5 , 9×10 -5 , 1×10 -4 , 2×10 -4 , 3×10 -4 , 4×10 -4 , 5×10 -4 wait.

[0026] Preferably, the hydrogen-containing polysiloxane includes any one or two or more of terminal hydrogen-containing silicone oil, side hydrogen-containing silicone oil and terminal-side mixed hydrogen-containing silicone oil.

[0027] More preferably, the hydrogen-containing polysiloxane comprises pendant hydrogen-containing silicone oil and / or terminal mixed hydrogen-containing silicone oil.

[0028] Preferably, the molecular weight of the hydrogen-containing polysiloxane is 500-20000 g / mol.

[0029] In the present invention, unless otherwise specified, the molecular weight refers to the number average molecular weight.

[0030] Preferably, the hydrogen content of the hydrogen-containing polysiloxane is 0.01-3 wt%.

[0031] More preferably, the molecular weight of the terminal hydrogen-containing silicone oil is 500-12000 g / mol, and the hydrogen content is 0.01-0.8%; for example, it can be 500 g / mol (hydrogen content is 0.78%), 800 g / mol (hydrogen content is 0.65%), 1000 g / mol (hydrogen content is 0.60%), 1200 g / mol (hydrogen content is 0.48%), 1500 g / mol (hydrogen content is 0.31%), 2000 g / mol (hydrogen content is 0.18%), 3000 g / mol (hydrogen content is 0.15%), 4000 g / mol (hydrogen content is 0.12%), 5000 g / mol (hydrogen content is 0.09%), 6000 g / mol (hydrogen content is 0.07%), 7000 g / mol (hydrogen content is 0.10%), 8000 g / mol (hydrogen content is 0.11%), 9000 g / mol (hydrogen content is 0.13%), 1000 g / mol (hydrogen content is 0.11%), 1500 g / mol (hydrogen content is 0.1 ... %), 7000g / mol (hydrogen content is 0.065%), 8000g / mol (hydrogen content is 0.06%), 8500g / mol (hydrogen content is 0.058%), 9500g / mol (hydrogen content is 0.04%), 11000g / mol (hydrogen content is 0.03%), etc.

[0032] Further preferably, the molecular weight of the terminal hydrogen-containing silicone oil is 1000-10000 g / mol, more preferably 2000-8000 g / mol, and even more preferably 2000-6000 g / mol.

[0033] More preferably, the molecular weight of the side group hydrogen-containing silicone oil is 500-20000 g / mol, and the hydrogen content is 0.05-2%; for example, it can be 500 g / mol (hydrogen content is 1.98%), 750 g / mol (hydrogen content is 1.67%), 900 g / mol (hydrogen content is 1.55%), 1200 g / mol (hydrogen content is 1.43%), 1500 g / mol (hydrogen content is 1.39%), 2000 g / mol (hydrogen content is 1.31%), 3000 g / mol (hydrogen content is 1.25%), 4000 g / mol (hydrogen content is 1.13%), 5000 g / mol (hydrogen content is 0.98%), 6000 g / mol (hydrogen content is 0.68%), 8000 g / mol (hydrogen content is 0.34%). %), 10000g / mol (hydrogen content is 0.22%), 12000g / mol (hydrogen content is 0.13%), 15000g / mol (hydrogen content is 0.08%), 18000g / mol (hydrogen content is 0.06%), etc.

[0034] More preferably, the molecular weight of the end-side mixed hydrogenated silicone oil is 600-20,000 g / mol, and the hydrogen content is 0.02-3%; for example, it can be 750 g / mol (hydrogen content is 2.88%), 850 g / mol (hydrogen content is 2.65%), 1000 g / mol (hydrogen content is 2.15%), 1200 g / mol (hydrogen content is 1.93%), 1400 g / mol (hydrogen content is 1.64%), 1800 g / mol (hydrogen content is 1.32%), 2000 g / mol (hydrogen content is 1.18%), 3000 g / mol (hydrogen content is 1.03%), 5000 g / mol (hydrogen content is 0.97%), 6000 g / mol (hydrogen content is 0.88%), 8000 g / mol (hydrogen content is 0.66%). %), 10000g / mol (hydrogen content is 0.52%), 12000g / mol (hydrogen content is 0.28%), 15000g / mol (hydrogen content is 0.09%), 18000g / mol (hydrogen content is 0.06%), etc.

[0035] Preferably, the tertiary amine functionalized unsaturated monomer includes one or more of dimethylaminoethyl methacrylate, dimethylaminopropyl methacrylate, dimethylaminoethyl acrylate, 1-(4-vinylphenyl)ethylamine, N,N-dimethyl-4-vinylaniline, N,N-dimethylvinylbenzylamine, 4-(vinylsulfonyl)aniline, and N,N-dimethyl-1-vinylnaphthalene-2-amine.

[0036] More preferably, the tertiary amine functionalized unsaturated monomer includes any one of dimethylaminoethyl acrylate, dimethylaminopropyl methacrylate, N,N-dimethyl-p-vinylphenylethylamine, N,N-dimethyl-4-vinylaniline, N,N-dimethylvinylbenzylamine, dimethylallylamine, N,N-dimethyl-1-vinylnaphthalene-2-amine, and N,N-dimethyl-4-(vinylsulfonyl)aniline in combination with dimethylaminoethyl methacrylate.

[0037] In a second aspect, the present invention provides a tertiary amino polysiloxane, which is prepared according to the preparation method described in the first aspect.

[0038] In a third aspect, the present invention provides a method for preparing a quaternized long alkyl polysiloxane, comprising the following steps: subjecting a tertiary amino polysiloxane and a long-chain halogenated alkane to a substitution reaction in the absence of a solvent to obtain a quaternized long alkyl polysiloxane; The tertiary amino polysiloxane includes the above-mentioned tertiary amino polysiloxane; The carbon chain length of the long-chain halogenated alkane is ≥3, for example, 6, 8, 10, 12, 14, 16, 18, 22, etc.

[0039] Preferably, the temperature of the substitution reaction is 70-140° C., and the time of the substitution reaction is 3-14 h.

[0040] The present invention directly completes quaternization under solvent-free conditions by subjecting tertiary amino polysiloxane to a melt phase interface substitution reaction with a long-chain halogenated alkane, thereby avoiding toxic solvent residues and reducing energy consumption, thereby achieving green production and having great application value.

[0041] More preferably, the carbon chain length of the long-chain halogenated alkane is ≥6.

[0042] Preferably, the molar ratio of the tertiary amino polysiloxane to the long-chain halogenated alkane is 1:1.1-55.

[0043] Based on the stability and comprehensive performance of the subsequent preparation of cationic polysiloxane emulsion, the molar ratio of the hydrogenated polysiloxane, the tertiary amine functionalized unsaturated monomer, the catalyst, and the long-chain halogenated alkane is 1: (1.1-45): (5×10 -6 ~5×10 -4 ): (1.1~55).

[0044] More preferably, the molar ratio of the hydrogen-containing polysiloxane, the tertiary amine functionalized unsaturated monomer, the catalyst, and the long-chain halogenated alkane is 1: (1.1-40): (5×10 -6 ~5×10 -4 ): (1.1~52).

[0045] Preferably, the long-chain halogenated alkane includes any one of 1-chlorooctadecane, 1-iodododecane, tetradecyl fluoride, 1-chlorohexane, 1-bromooctane, 1-chlorododecane, 1-bromododecane, bromohexadecane, 1-iodooctane, 12-bromododecanoic acid methyl ester, dodecamethylene dibromide, 1-chloro-3-iodopropane, 16-bromopalmitic acid, and 1-chloro-6-fluorohexane, or a combination of at least two thereof.

[0046] More preferably, the long-chain halogenated alkane includes any one of 1-iodododecane, tetradecyl fluoride, 1-chlorohexane, 1-bromooctane, 1-chlorododecane, 1-bromododecane, bromohexadecane, 1-iodooctane, 12-bromododecanoic acid methyl ester, dodecamethylene dibromide, 1-chloro-3-iodopropane, 16-bromopalmitic acid, 1-chloro-6-fluorohexane, or a combination of two or more thereof and 1-chlorooctadecane.

[0047] In a fourth aspect, the present invention provides a quaternized long alkyl polysiloxane, which is prepared according to the above-mentioned preparation method.

[0048] In a fifth aspect, the present invention provides a cationic polysiloxane emulsion comprising, by weight percentage, 15 to 50 wt% of a quaternized polysiloxane and the balance water; The quaternized polysiloxane includes the quaternized long alkyl polysiloxane mentioned above.

[0049] Preferably, the preparation method of the cationic polysiloxane emulsion comprises the following steps: The above-mentioned quaternized long alkyl polysiloxane and deionized water are emulsified at room temperature for 30-60 minutes, and the pH of the system is adjusted to 5.0-7.5 to obtain a stable cationic polysiloxane emulsion.

[0050] In a sixth aspect, the present invention provides an application of the above-mentioned cationic polysiloxane emulsion in textiles, leather and coatings.

[0051] More preferably, the cationic polysiloxane emulsion is used as a finishing agent for textiles.

[0052] Preferably, the textile comprises any one of cotton, polyester, wool, acrylic or a blend thereof.

[0053] Compared with the prior art, the present invention has at least the following beneficial effects: 1. The preparation method of tertiary amino polysiloxane provided by the present invention uses a ligand-modified platinum catalyst to catalyze the hydrosilylation reaction of hydrogen-containing polysiloxane and tertiary amine-functionalized unsaturated monomers. The catalyst still maintains a catalytic activity of ≥90% in an alkaline system with a pH of 8-10 (the activity of traditional catalysts drops to below 30%), which not only increases the reaction rate but also significantly reduces the reaction temperature, allowing the reaction temperature to be controlled at 120°C or below, effectively suppressing the formation of by-products caused by high-temperature and long-term reactions, and improving the reaction uniformity. Furthermore, the present invention directly completes quaternization under solvent-free conditions through a melt phase interfacial substitution reaction between tertiary amino polysiloxane and long-chain halogenated alkanes, avoiding toxic solvent residues and reducing energy consumption, providing a new method for the green and efficient synthesis of quaternary ammonium salt cationic polysiloxanes.

[0054] 2. The quaternary ammonium salt cationic polysiloxane synthesized in the present invention has both long alkyl chain segments and organosilicon chain segments, combining the hydrophobicity, heat stability and excellent compatibility of the long alkyl group with the softness of organosilicon and the bactericidal and antistatic properties of the quaternary ammonium salt. As a result, the quaternary ammonium salt cationic polysiloxane emulsion prepared thereby has a series of excellent properties such as softness, hydrophobicity, antibacterial and antistatic properties, and has extremely high practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1This is the infrared spectrum of the MOF-modified platinum catalyst obtained in Synthesis Example 1 of the present invention.

[0056] Figure 2 This is the infrared spectrum of the ammonium long alkyl polysiloxane obtained in Example 1 of the present invention.

[0057] Figure 3 This is a synthetic route diagram of the quaternized long alkyl polysiloxane provided in Example 1 of the present invention.

[0058] Figure 4 This is a synthetic route diagram of the quaternized long alkyl polysiloxane provided in Example 6 of the present invention.

[0059] Figure 5 This is a synthetic route diagram of the quaternized long alkyl polysiloxane provided in Example 7 of the present invention.

[0060] Figure 6 Graphs showing the test results of the surface contact angles of the cationic silicone oil emulsions obtained in Examples 1 to 10 of the present invention and Comparative Examples 2 to 4 on cotton fabrics. DETAILED DESCRIPTION

[0061] The technical solution of the present invention is further described below by way of specific embodiments. It should be understood by those skilled in the art that the embodiments are merely to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0062] The following is the determination of Si-H characteristic peaks (2100 ~ 2200cm) in the hydrosilylation reaction by Fourier transform infrared spectroscopy. -1 ) intensity to determine the conversion rate of active hydrogen in the hydrogen-containing polysiloxane, thereby determining the chemical conversion rate of the product. The above method is well known in the art and will not be repeated here. Synthesis example 1

[0063] This synthesis example provides a method for preparing a MOF-modified platinum catalyst, which comprises the following steps: 10 g of chloroplatinic acid (H2PtCl6·6H2O) and 16.6 g of 1,3-diphenyltetramethyldisiloxane (DPTMDS) were dissolved in 40 mL of ethanol solution and stirred at 50 °C for 8 h. The ethanol was then distilled off to obtain the original platinum catalyst (Pt(0)-DPTMDS). At the same time, 10 g of 2-ethylimidazole and 34 g of zinc nitrate were stirred in 50 mL of methanol at room temperature for 24 h to obtain MOF (ZIF-8) nanoparticles for use. 10 g of Pt(0)-DPTMDS was dissolved in 20 mL of toluene solution and mixed with 80 g of MOF (ZIF-8) suspension for 3 h. The mixture was then ultrasonically treated for 1 h, and the supernatant was removed by centrifugation. The MOF-modified platinum catalyst was then activated at 120 °C for 2 h in a nitrogen environment to obtain the MOF-modified platinum catalyst. The MOF-modified platinum catalyst was dispersed in toluene and diluted to a concentration of 0.05 mol Pt / kg dispersion to form a uniform and stable toluene dispersion, which was stored in the dark for future use.

[0064] The MOF-modified platinum catalyst used in the following examples is the MOF-modified platinum catalyst obtained in Synthesis Example 1. Example 1

[0065] 1-1 Preparation of quaternized long alkyl polysiloxane The raw materials for preparing quaternized long alkyl polysiloxane include: 0.5 mol end-hydrogenated silicone oil (Runhe Materials, RH-H518, Mn=500 g / mol, hydrogen content of 0.17%), 0.55 mol dimethylaminoethyl methacrylate (Aladdin reagent), 8×10 -6 mol MOF-modified platinum catalyst and 0.58 mol 1-chlorooctadecane.

[0066] The preparation method of the above-mentioned quaternized long alkyl polysiloxane comprises the following steps, and its synthesis path is as follows Figure 1 As shown: End-hydrogenated silicone oil (Runhe Materials, RH-H518), dimethylaminoethyl methacrylate (Aladdin) and MOF-modified platinum catalyst were evenly mixed and stirred. The system was slowly heated to 65°C and kept warm for 4 hours. After the reaction, the system was cooled to room temperature to obtain tertiary amino polysiloxane with a reaction conversion rate of >95%. 1-Chlorooctadecane was then added to the obtained tertiary amino polysiloxane, and the system was heated to 75°C and kept warm for 3 hours. After the reaction, the system was cooled to room temperature to obtain quaternized long alkyl polysiloxane (J-1).

[0067] Preparation of 1-2 cationic polysiloxane emulsion The raw materials for preparing cationic polysiloxane emulsion include: Quaternized long alkyl polysiloxane (J-1) and 950 g deionized water.

[0068] The preparation method of the above-mentioned cationic polysiloxane emulsion comprises the following steps: Deionized water was added to the above-mentioned quaternized long alkyl polysiloxane (J-1), and the mixture was emulsified for 30 minutes under the action of a high-speed emulsifier to obtain a quaternary ammonium salt cationic polysiloxane emulsion (R1) having a long alkyl group. Example 2

[0069] 2-1 Preparation of quaternized long alkyl polysiloxane The raw materials for preparing quaternized long alkyl polysiloxane include: 0.5 mol end-hydrogenated silicone oil (Runhe Materials, RH-H518, Mn=500 g / mol, hydrogen content of 0.17%), 0.53 mol dimethylaminoethyl acrylate (exploratory reagent), 8×10 -6 mol MOF modified platinum catalyst, 0.55 mol 1-chlorooctadecane.

[0070] The preparation method of the above-mentioned quaternized long alkyl polysiloxane comprises the following steps: End-hydrogenated silicone oil (Runhe Materials, RH-H518), dimethylaminoethyl acrylate (exploratory reagent) and MOF-modified platinum catalyst were mixed evenly, stirred, and the system was slowly heated to 60°C and kept warm for 3.5 hours. After the reaction, it was cooled to room temperature to obtain tertiary amino polysiloxane, and the reaction conversion rate was measured to be >95%. Subsequently, 1-chlorooctadecane was added to the obtained tertiary amino polysiloxane, and the system was heated to 70°C and kept warm for 4 hours. After the reaction, the system was cooled to room temperature to obtain quaternized long alkyl polysiloxane (J-2).

[0071] Preparation of 2-2 Cationic Polysiloxane Emulsion The raw materials for preparing cationic polysiloxane emulsion include: Quaternized long alkyl polysiloxane (J-2) and 950 g deionized water.

[0072] The preparation method of the above-mentioned cationic polysiloxane emulsion comprises the following steps: Deionized water was added to the above-mentioned quaternized long alkyl polysiloxane (J-2), and the mixture was emulsified for 30 minutes under the action of a high-speed emulsifier to obtain a quaternary ammonium salt cationic polysiloxane emulsion (R2) having a long alkyl group. Example 3

[0073] 3-1 Preparation of quaternized long alkyl polysiloxane The raw materials for preparing quaternized long alkyl polysiloxane include: 0.5 mol hydrogen-terminated silicone oil (Anhui Aiyota silicone oil, MY-616, molecular weight 550, hydrogen content 0.5%), 1.5 mol dimethylaminoethyl methacrylate (Aladdin reagent), 1×10 -5 mol MOF-modified platinum catalyst and 1.6 mol 1-chlorooctadecane.

[0074] The preparation method of the above-mentioned quaternized long alkyl polysiloxane comprises the following steps: End-hydrogenated silicone oil (Anhui Aiyota Silicone Oil, MY-616), dimethylaminoethyl methacrylate (Aladdin reagent) and MOF-modified platinum catalyst were mixed evenly, stirred, and the system was slowly heated to 70°C and kept warm for 4 hours. After the reaction, the system was cooled to room temperature to obtain tertiary amino polysiloxane, and the reaction conversion rate was measured to be >95%. Subsequently, 1-chlorooctadecane was added to the obtained tertiary amino polysiloxane, and the system was heated to 85°C and kept warm for 4 hours. After the reaction, the system was cooled to room temperature to obtain quaternized long alkyl polysiloxane (J-3).

[0075] 3-2 Preparation of Cationic Polysiloxane Emulsion The raw materials for preparing cationic polysiloxane emulsion include: Quaternized long alkyl polysiloxane (J-3) and 1350 g deionized water.

[0076] The preparation method of the above-mentioned cationic polysiloxane emulsion comprises the following steps: Deionized water was added to the above-mentioned quaternized long alkyl polysiloxane (J-3), and the mixture was emulsified for 30 minutes under the action of a high-speed emulsifier to obtain a quaternary ammonium salt cationic polysiloxane emulsion (R3) having a long alkyl group. Example 4

[0077] 4-1 Preparation of Quaternized Long Alkyl Polysiloxane The raw materials for preparing quaternized long alkyl polysiloxane include: 0.1 mol hydrogen-terminated silicone oil (Runhe Materials, RH-H222-10, molecular weight 2850, hydrogen content 0.03%), 0.2 mol dimethylaminoethyl methacrylate (Aladdin reagent), 8×10 -6 mol MOF-modified platinum catalyst and 0.22 mol 1-chlorooctadecane.

[0078] The preparation method of the above-mentioned quaternized long alkyl polysiloxane comprises the following steps: End-hydrogenated silicone oil (Runhe Materials, RH-H222-10), dimethylaminoethyl methacrylate (Aladdin reagent) and MOF-modified platinum catalyst were mixed evenly, stirred, and the system was slowly heated to 90°C and kept warm for 6 hours. After the reaction, the system was cooled to room temperature to obtain tertiary amino polysiloxane, and the reaction conversion rate was measured to be >95%. Subsequently, 1-chlorooctadecane was added to the obtained tertiary amino polysiloxane, and the system was heated to 100°C and kept warm for 5 hours. After the reaction, the system was cooled to room temperature to obtain quaternized long alkyl polysiloxane (J-4).

[0079] 4-2 Preparation of Cationic Polysiloxane Emulsion The raw materials for preparing cationic polysiloxane emulsion include: Quaternized long alkyl polysiloxane (J-4) and 860 g deionized water.

[0080] The preparation method of the above-mentioned cationic polysiloxane emulsion comprises the following steps: Deionized water was added to the above-mentioned quaternized long alkyl polysiloxane (J-4), and the mixture was emulsified for 30 minutes under the action of a high-speed emulsifier to obtain a quaternary ammonium salt cationic polysiloxane emulsion (R4) having a long alkyl group. Example 5

[0081] 5-1 Preparation of Quaternized Long Alkyl Polysiloxane The raw materials for preparing quaternized long alkyl polysiloxane include: 0.1 mol hydrogen-terminated silicone oil (Runhe Materials, RH-H222-10, molecular weight 2850, hydrogen content 0.03%), 0.22 mol dimethylaminoethyl methacrylate (Aladdin reagent), 8×10 -6 mol MOF-modified platinum catalyst and 0.23 mol 1-chlorohexane.

[0082] The preparation method of the above-mentioned quaternized long alkyl polysiloxane comprises the following steps: End-hydrogenated silicone oil (Runhe Materials, RH-H222-10), dimethylaminoethyl methacrylate (Aladdin reagent) and MOF-modified platinum catalyst were mixed evenly, stirred, and the system was slowly heated to 90°C and kept warm for 8 hours. After the reaction, it was cooled to room temperature to obtain tertiary amino polysiloxane, and the reaction conversion rate was measured to be >95%. Subsequently, 1-chlorohexane was added to the obtained tertiary amino polysiloxane, and the system was heated to 110°C and kept warm for 6 hours. After the reaction, quaternized long alkyl polysiloxane (J-5) was obtained.

[0083] 5-2 Preparation of Cationic Polysiloxane Emulsion The raw materials for preparing cationic polysiloxane emulsion include: Quaternized long alkyl polysiloxane (J-5) and 1550 g deionized water.

[0084] The preparation method of the above-mentioned cationic polysiloxane emulsion comprises the following steps: Deionized water was added to the above-mentioned quaternized long alkyl polysiloxane (J-5), and the mixture was emulsified for 30 minutes under the action of a high-speed emulsifier to obtain a quaternary ammonium salt cationic polysiloxane emulsion (R5) having a long alkyl group. Example 6

[0085] Preparation of 6-1 Quaternized Long Alkyl Polysiloxane The raw materials for the preparation of quaternized long alkyl polysiloxane include: 0.01 mol of side-group hydrogenated silicone oil (molecular weight 3000, hydrogen content 1.25%), 0.4 mol of dimethylaminoethyl methacrylate (Aladdin reagent), 2×10 -6 mol MOF modified platinum catalyst, 0.48 mol 1-chlorohexane.

[0086] The preparation method of the above-mentioned quaternized long alkyl polysiloxane comprises the following steps, and its synthesis path is as follows Figure 2 As shown: Pendant hydrogen-containing silicone oil (molecular weight 3000, hydrogen content 1.25%), dimethylaminoethyl methacrylate (Aladdin reagent) and MOF-modified platinum catalyst were mixed evenly, stirred, and the system was slowly heated to 90°C and kept at this temperature for 10 hours. After the reaction, the system was cooled to room temperature to obtain tertiary amino polysiloxane, and the reaction conversion rate was measured to be >90%. Subsequently, 1-chlorohexane was added to the obtained tertiary amino polysiloxane, and the system was heated to 100°C and kept at this temperature for 4 hours. After the reaction, the system was cooled to room temperature to obtain quaternized long alkyl polysiloxane (J-6).

[0087] Preparation of 6-2 Cationic Polysiloxane Emulsion The raw materials for preparing cationic polysiloxane emulsion include: Quaternized long alkyl polysiloxane (J-6) and 650 g deionized water.

[0088] The preparation method of the above-mentioned cationic polysiloxane emulsion comprises the following steps: Deionized water was added to the above-mentioned quaternized long alkyl polysiloxane (J-6), and the mixture was emulsified for 30 minutes under the action of a high-speed emulsifier to obtain a quaternary ammonium salt cationic polysiloxane emulsion (R6) having a long alkyl group. Example 7

[0089] 7-1 Preparation of Quaternized Long Alkyl Polysiloxane The raw materials for the preparation of quaternized long alkyl polysiloxane include: 0.01 mol of end-side mixed hydrogenated silicone oil (Silok New Materials Co., Ltd., CS-500, molecular weight 2500, hydrogen content 1.5%), 0.42 mol of dimethylaminoethyl methacrylate (Aladdin reagent), 3×10 -6 mol MOF modified platinum catalyst, 0.50 mol 1-chlorohexane.

[0090] The preparation method of the above-mentioned quaternized long alkyl polysiloxane comprises the following steps, and its synthesis path is as follows Figure 3 As shown: The end-side mixed hydrogenated silicone oil (Silok New Materials Co., Ltd., CS-500), dimethylaminoethyl methacrylate (Aladdin reagent) and MOF-modified platinum catalyst were mixed evenly, stirred, and the system was slowly heated to 80°C and kept warm for 8 hours. After the reaction, the system was cooled to room temperature to obtain tertiary amino polysiloxane, and the reaction conversion rate was measured to be >90%. Subsequently, 1-chlorooctadecane was added to the obtained tertiary amino polysiloxane, and the system was heated to 110°C and kept warm for 5 hours. After the reaction, the system was cooled to room temperature to obtain quaternized long alkyl polysiloxane (J-7).

[0091] 7-2 Preparation of Cationic Polysiloxane Emulsion The raw materials for preparing cationic polysiloxane emulsion include: Quaternized long alkyl polysiloxane (J-7) and 850 g deionized water.

[0092] The preparation method of the above-mentioned cationic polysiloxane emulsion comprises the following steps: Deionized water was added to the above-mentioned quaternized long alkyl polysiloxane (J-7), and the mixture was emulsified for 30 minutes under the action of a high-speed emulsifier to obtain a quaternary ammonium salt cationic polysiloxane emulsion (R7) having a long alkyl group. Example 8

[0093] The only difference between this embodiment and Example 1 is that in this embodiment, the terminal hydrogen-containing silicone oil (Runhe Materials, RH-H518, Mn=500 g / mol, hydrogen content of 0.17%) is replaced with an equivalent number of moles of terminal hydrogen-containing silicone oil (Dongwang Textile Technology DW-165, molecular weight 6000, hydrogen content 0.015%).

[0094] A tertiary amino polysiloxane was prepared by the same preparation method as in Example 1, and a quaternized long alkyl polysiloxane (J8) was further obtained. The quaternary ammonium polysiloxane was further mixed with deionized water and emulsified in a high-speed emulsifier for 30 minutes to obtain a quaternary ammonium salt cationic polysiloxane emulsion (R8) with a long alkyl group. Example 9

[0095] The only difference between this embodiment and embodiment 1 is that in this embodiment, dimethylaminoethyl methacrylate is replaced with dimethylallylamine in an equal molar amount.

[0096] A tertiary amino polysiloxane was prepared by the same preparation method as in Example 1, and a quaternized long alkyl polysiloxane (J9) was further obtained. The quaternary ammonium polysiloxane was further mixed with deionized water and emulsified in a high-speed emulsifier for 30 minutes to obtain a quaternary ammonium salt cationic polysiloxane emulsion (R9) with a long alkyl group. Example 10

[0097] The only difference between this example and Example 1 is that in this example, dimethylaminoethyl methacrylate is replaced with a composition comprising dimethylaminoethyl methacrylate and dimethylallylamine in a molar ratio of 1:1, and the total amount of the composition remains consistent with the amount of dimethylaminoethyl methacrylate in Example 1, and the amounts of other raw materials also remain unchanged.

[0098] A tertiary amino polysiloxane was prepared by the same preparation method as in Example 1, and a quaternized long alkyl polysiloxane (J10) was further obtained. The quaternary ammonium polysiloxane was further mixed with deionized water and emulsified in a high-speed emulsifier for 30 minutes to obtain a quaternary ammonium salt cationic polysiloxane emulsion (R10) with a long alkyl group. Example 11

[0099] 11-1 Preparation of Quaternized Long Alkyl Polysiloxane The raw materials for preparing quaternized long alkyl polysiloxane include: 0.02 mol of side-group hydrogenated silicone oil (Mn=1500 g / mol, hydrogen content of 1.39%), 0.4 mol of dimethylaminoethyl methacrylate (Aladdin reagent), 8×10 -5 mol MOF-modified platinum catalyst and 0.42 mol 1-chlorooctadecane.

[0100] The preparation method of the above-mentioned quaternized long alkyl polysiloxane comprises the following steps: The side-group hydrogenated silicone oil, dimethylaminoethyl methacrylate (Aladdin), and MOF-modified platinum catalyst were evenly mixed and stirred. The system was slowly heated to 65°C and kept at this temperature for 4 hours. After the reaction, the system was cooled to room temperature to obtain a tertiary amino polysiloxane with a reaction conversion rate of >95%. 1-Chlorooctadecane was then added to the obtained tertiary amino polysiloxane, and the system was heated to 75°C and kept at this temperature for 3 hours. After the reaction, the system was cooled to room temperature to obtain a quaternized long alkyl polysiloxane (J-11).

[0101] 11-2 Preparation of Cationic Polysiloxane Emulsion The raw materials for preparing cationic polysiloxane emulsion include: Quaternized long alkyl polysiloxane (J-11) and 950 g deionized water.

[0102] The preparation method of the above-mentioned cationic polysiloxane emulsion comprises the following steps: Deionized water was added to the above-mentioned quaternized long alkyl polysiloxane (J-11), and the mixture was emulsified for 60 minutes under the action of a high-speed emulsifier to obtain a quaternary ammonium salt cationic polysiloxane emulsion (R11) having a long alkyl group. Comparative Example 1

[0103] The only difference between this comparative example and Example 1 is that the catalyst used in this comparative example is a Karstedt catalyst that has not been modified by MOF, and the weights and amounts of other raw materials remain unchanged.

[0104] Tertiary amino polysiloxane was prepared by the same preparation method as in Example 1, and the conversion rate was measured to be 29%. Comparative Example 2

[0105] The only difference between this comparative example and Example 1 is that the MOF-modified platinum catalyst used in this comparative example is prepared by the following preparation method: 10 g of 2-ethylimidazole and 34 g of zinc nitrate were stirred in 50 mL of methanol at room temperature for 24 h to obtain MOF (ZIF-8) nanoparticles for use; 10 g of chloroplatinic acid (H2PtCl6•6H2O) was dissolved in 20 mL of toluene solution, mixed with 80 g of MOF (ZIF-8) suspension and stirred for 3 h, followed by ultrasonic treatment for 1 h, and then centrifuged to remove the supernatant. The modified platinum catalyst was then activated at high temperature for 2 h under a nitrogen environment at 120 °C to obtain the modified platinum catalyst, and the modified platinum catalyst was dispersed in toluene and diluted to a dispersion with a concentration of 0.05 mol Pt / kg to form a uniform and stable toluene dispersion, which was stored in the dark for use. Comparative Example 3

[0106] The only difference between this comparative example and Example 1 is that in this comparative example, 1-chlorooctadecane is replaced by the same molar amount of benzyl chloride. Comparative Example 4

[0107] The only difference between this comparative example and Example 1 is that in this comparative example, 1-chlorooctadecane is replaced by the same molar amount of 1-naphthylmethyl chloride. Application Examples 1-11

[0108] The padding finishing solutions for fabrics provided in Application Examples 1 to 11 respectively include: 10 g of the cationic polysiloxane emulsion obtained in Examples 1 to 11 respectively, and 90 g of deionized water. Comparative Application Examples 1 to 4

[0109] The padding finishing solutions for the fabrics provided in Comparative Application Examples 1 to 4 respectively include: 10 g of the cationic polysiloxane emulsions obtained in Comparative Examples 1 to 4 respectively, and 90 g of deionized water. Performance Testing

[0110] 10 g of the cationic polysiloxane emulsion obtained in Examples 1 to 11 and Comparative Examples 1 to 4 was dissolved in 90 g of deionized water, and air bubbles were removed by ultrasonication. The emulsion was then treated with cotton fabric according to the following finishing process: cotton fabric (soaping) - two immersions and two paddings (padding rate of 80%) - baking (130°C, 3 min), and the following tests were performed. The specific test methods are as follows: (1) Softness: Cut the treated fabric into 10×10 cm size and measure the softness using a computer softness meter. The smaller the test force required, the better the softness of the fabric.

[0111] (2) Yellowing resistance: Test the fabric samples according to the method in GB / T 30669-2014 “Textiles—Tests for colour fastness—Colour fastness to yellowing from light”.

[0112] (3) Friction resistance test: The fabric to be tested was cut into an upper sample of 30 mm × 28 mm and a lower sample of 30 mm × 77 mm. The lower sample was fixed in the clamping device of the YG821L style meter test platform. The upper sample was covered on the surface of the lower sample in the same fabric direction. The friction performance test was carried out under a standard test environment with a temperature of 22 ± 2 °C and a relative humidity of 68% ± 2%.

[0113] (4) Antistatic test: The antistatic performance of the fabric is tested according to the method in GB / T 12703.1-2021 "Test method for electrostatic properties of textiles - Part 1: Corona charging method".

[0114] (5) Surface contact angle test: The surface contact angle of the fabric is tested according to the method in GB / T 42694-2023 "Test and evaluation of anti-wetting properties of textile surfaces - Contact angle and rolling angle method" to characterize the hydrophilic and hydrophobic properties of the fabric.

[0115] The specific test results are shown in Table 1 and Figure 4 As shown, the cloth sample not treated with cationic polysiloxane emulsion was used as a blank for comparison.

[0116] Table 1

[0117] As can be seen from the data of Table 1, the long-chain alkyl quaternary ammonium salt cationic polysiloxane emulsion provided by the embodiments of the present invention 1~11 has good performance, is applied to the textile finishing, can give fabric outstanding softness, yellowing resistance and smoothness.Compared with blank fabric, the fabric softness of the cationic polysiloxane emulsion finishing obtained through the embodiments of the present invention is higher.The fabric softness best of the cationic polysiloxane emulsion processing that wherein adopts embodiment 8 to provide, its softness is 2.93 times of blank fabric, and this is because the cationic polysiloxane emulsion molecular weight that embodiment 8 obtains is larger, and the siloxane segment content in the molecule is higher, thereby softness best.

[0118] The product obtained in Comparative Example 1 could not be tested because the catalyst used in Comparative Example 1 was an unmodified Karstedt catalyst, which had low catalytic activity in a reaction system containing an alkaline unsaturated substrate and could not effectively catalyze the hydrosilylation reaction of terminal hydrogenated silicone oil and dimethylaminoethyl methacrylate. Therefore, the target product, quaternized long alkyl polysiloxane and the emulsion containing it, could not be obtained.

[0119] In addition, the fabric yellowing resistance of the quaternized long alkyl polysiloxane arranged using the present embodiment is more excellent, this is due to the weather resistance of silicone, and the long alkyl and ester groups in the molecule give it better thermal stability, so the yellowing resistance is more excellent; and they have a lower friction coefficient, which is mainly because the silicone in the molecule and the long alkyl quaternary ammonium salt structure improve the smoothness and fluffiness of the fabric; the fabric arranged using the quaternized long alkyl polysiloxane cationic emulsion in the present embodiment also has good antistatic properties, which is due to the cationic structure in the molecule can effectively neutralize charge, and the cationic polysiloxane emulsion half-life time obtained in Example 8 is the longest, this is because its molecular weight is the largest, and the quaternary ammonium salt in the molecule accounts for a small proportion, so the antistatic property is slightly poor.

[0120] Depend on Figure 6 It can be seen that the fabrics treated with the quaternized long alkyl polysiloxanes provided in this example all have good hydrophobicity. Among them, the fabrics treated with the cationic polysiloxane emulsions obtained with the quaternized long alkyl polysiloxanes prepared in Examples 1 to 11 have better hydrophobicity, and the fabric treated with the cationic polysiloxane emulsion prepared in Example 4 has the best hydrophobicity. The fabrics treated with the cationic polysiloxane emulsions obtained in Comparative Examples 3 and 4 have slightly poorer hydrophobicity. This is because the long alkyl group introduced into the molecule has better hydrophobic properties than the benzene ring or naphthalene ring.

[0121] This softener has broad application prospects in the field of textile softening and finishing. It is suitable for fabrics made of various fiber materials, such as cotton, linen, silk, chemical fiber, etc. It can significantly improve the quality and wearing comfort of fabrics, providing new technical options for the textile finishing industry and promoting the industry to develop in the direction of high performance and environmental protection.

[0122] The applicant states that the present invention specifically illustrates the tertiary amino polysiloxane and its preparation method, the quaternized long alkyl polysiloxane and its preparation method, and the emulsions containing the same and their applications through the above-mentioned embodiments. However, the present invention is not limited to the above-mentioned embodiments, nor does it necessarily rely on these specific examples for implementation. Those skilled in the art should understand that any improvements to the present invention, including but not limited to equivalent substitutions of various raw materials, the addition of auxiliary ingredients, and the selection of specific embodiments, should be considered part of the scope of protection and disclosure of the present invention.

Claims

1. A method for preparing tertiary amino polysiloxane, characterized in that: The preparation method of the tertiary amino polysiloxane comprises the following steps: The hydrogen-containing polysiloxane and the tertiary amine functionalized unsaturated monomer are subjected to a hydrosilylation reaction under the action of MOF-modified platinum catalyst to obtain tertiary amino polysiloxane; The temperature of the hydrosilylation reaction is 60-100° C., and the time of the hydrosilylation reaction is 2-12 h.

2. The method for preparing tertiary amino polysiloxane according to claim 1, wherein The molar ratio of the hydrogen-containing polysiloxane, the tertiary amine functionalized unsaturated monomer, and the catalyst is 1: (1.05-45): (5×10 -6 ~5×10 -4 ).

3. The method for preparing tertiary amino polysiloxane according to claim 1, wherein The MOF-modified platinum catalyst is prepared by the following preparation method: reacting a platinum catalyst with a phenyl-containing organosilicon compound to generate a platinum catalyst precursor; modifying the platinum catalyst precursor with a metal organic framework compound to obtain the MOF-modified platinum catalyst; Preferably, the metal organic framework compound comprises a zeolite imidazolate framework compound; Preferably, the modification treatment comprises the following steps: stirring the platinum catalyst precursor and the metal organic framework compound to react, then performing ultrasonic treatment, and finally performing high temperature activation.

4. The method for preparing tertiary amino polysiloxane according to claim 1, wherein The hydrogen-containing polysiloxane includes any one or more of terminal hydrogen-containing silicone oil, side hydrogen-containing silicone oil and terminal-side mixed hydrogen-containing silicone oil; Preferably, the molecular weight of the hydrogen-containing polysiloxane is 500 to 20,000 g / mol; Preferably, the hydrogen content of the hydrogen-containing polysiloxane is 0.01 to 3 wt %; Preferably, the tertiary amine functionalized unsaturated monomer includes one or more of dimethylaminoethyl methacrylate, dimethylaminoethyl acrylate, dimethylaminopropyl methacrylate, N,N-dimethyl-p-vinylphenylethylamine, N,N-dimethyl-4-vinylaniline, N,N-dimethyl-2-vinylbenzylamine, dimethylallylamine, N,N-dimethyl-1-vinylnaphthalene-2-amine, and N,N-dimethyl-4-(vinylsulfonyl)aniline.

5. A tertiary amino polysiloxane, characterized in that The tertiary amino polysiloxane is prepared according to the preparation method according to any one of claims 1 to 4.

6. A method for preparing a quaternized long alkyl polysiloxane, characterized in that: The preparation method of the quaternized long alkyl polysiloxane comprises the following steps: subjecting tertiary amino polysiloxane and long-chain halogenated alkane to a substitution reaction in the absence of a solvent to obtain the quaternized long alkyl polysiloxane; The tertiary amino polysiloxane comprises the tertiary amino polysiloxane according to claim 5; The carbon chain length of the long-chain halogenated alkane is ≥3; Preferably, the temperature of the substitution reaction is 70-140° C., and the time of the substitution reaction is 3-14 h.

7. The method for preparing the quaternized long alkyl polysiloxane according to claim 6, wherein: The molar ratio between the tertiary amino polysiloxane and the long-chain halogenated alkane is 1:(1.1-55); Preferably, the long-chain halogenated alkane includes one or more of tetradecyl fluoride, 1-chlorooctadecane, 1-iodododecane, 1-chlorohexane, 1-bromooctane, 1-chlorododecane, 1-bromododecane, bromohexadecane, 1-iodooctane, 1-fluorooctadecane, 12-bromododecanoic acid methyl ester, dodecamethylene dibromide, 1-chloro-3-iodopropane, 16-bromopalmitic acid, and 1-chloro-6-fluorohexane.

8. A quaternized long alkyl polysiloxane, characterized in that The quaternized long alkyl polysiloxane is prepared according to the preparation method according to claim 6 or 7.

9. A cationic polysiloxane emulsion, characterized in that: In terms of weight percentage, the cationic polysiloxane emulsion comprises 15 to 50 wt% of quaternized polysiloxane and the balance of water; The quaternized polysiloxane comprises the quaternized long alkyl polysiloxane according to claim 8.

10. Use of the cationic polysiloxane emulsion according to claim 9 in textiles, leather and coatings.

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