Preparation method and application of fatty alcohol-polyether ester composite emulsion

Abstract

The invention provides a preparation method of a composite emulsion, and particularly aims at the problem of poor mixing stability of a fatty alcohol emulsion and a polyether ester emulsion, competitive adsorption among different polar components is avoided through step-by-step use of a nonionic emulsifier; the interface bonding force of fatty alcohol and paraffin is improved through high-pressure homogenization, and phase separation during polyether ester mixing is reduced; molecular thermal motion is reduced through low-temperature compounding, double electric layers are compressed by inorganic salt through a salting-out effect, and the stability of the emulsion is synergistically improved.

Description

Technical Field

[0001] The present invention relates to the field of fine chemicals, and in particular to a method for preparing a composite emulsion of fatty alcohol, paraffin and polyether ester. In particular, to address the problem of poor mixing stability of fatty alcohol emulsion and polyether ester emulsion, a solution is proposed that combines step-by-step emulsification, high-pressure homogenization and low-temperature compounding. Background Art

[0002] Fatty alcohol and polyetherester emulsions are widely used in textiles, daily chemicals, and other fields. However, direct mixing of the two is prone to problems such as delamination and flocculation, primarily due to differences in polarity and incompatibility of the emulsifying systems. Traditional methods typically use a single emulsifier or simple blending, but these methods lack the stability required to meet industrial requirements.

[0003] In the prior art, patent CN101690857B prepares an emulsion by compounding natural higher fatty alcohols, paraffin, polyether emulsifiers, alkyl glycosides, and thickeners. Patent CN102600647A adds anionic surfactants in the later stage of the emulsification process to make them adsorb on the surface of the fatty alcohol, but the compatibility and stability in different application systems still need to be improved; patent CN109369903A provides a method for preparing a narrow distribution fatty alcohol polyether, but does not mention the ability to suppress foam in industrial applications. Emulsions in the prior art are prone to stratification, flocculation, aggregation, and even demulsification during long-term storage or under harsh conditions, resulting in a decrease in their defoaming performance or failure. Although paraffin emulsions can improve the dispersibility of hydrophobic components, their compatibility with polyether esters is still insufficient. The emulsion may stratify during storage due to insufficient compatibility, thereby affecting its defoaming effect; and the synergistic effect of high-pressure homogenization and inorganic salts in the prior art has not been fully explored. Summary of the Invention

[0004] The fatty alcohol-polyether ester composite emulsion of the present invention is composed of the following components:

[0005] A. Paraffin

[0006] The paraffin wax of the present invention is a hydrocarbon compound extracted from petroleum, shale oil or other asphalt mineral oil, such as microcrystalline paraffin or liquid paraffin. The amount of paraffin wax used accounts for 2-8% of the total amount of the emulsion.

[0007] B. Nonionic emulsifier

[0008] The nonionic emulsifier described in the present invention is a commonly used nonionic surfactant selected from sorbitan monostearate (S-60), sorbitan monooleate (S-80), sorbitan monostearate polyoxyethylene ether ester (T-60), sorbitan monooleate polyoxyethylene ether ester (T-80), fatty alcohol polyoxyethylene ether, oleic acid polyoxyethylene ether, castor oil polyoxyethylene ether, alkylphenol polyoxyethylene ether, peregal O-15, peregal O-20, peregal O-25, peregal O-50, AEO-3, AEO-5, AEO-7, AEO-9, AEO-10, AEO-15, AEO-20, and AEO-22. The nonionic emulsifier is used in an amount of 0.1-10% of the total emulsion. The nonionic emulsifier is applied in two steps, represented by B1 and B2, respectively.

[0009] C. Water

[0010] In the present invention, the amount of water used accounts for 50-70% of the total amount of the emulsion. The water is used in two parts, represented by C1 and C2 respectively.

[0011] D. Polyether ester

[0012] The polyether ester of the present invention is prepared by a technique known in the art. Specifically, polypropylene glycol, polyethylene glycol, dibasic acid, and fatty acid are mixed in a molar ratio of 2-5:1:2-3:2-3.5 under a nitrogen atmosphere with p-toluenesulfonic acid as a catalyst, heated to 150-200°C, stirred, and reacted for 5-8 hours. After the reaction, the mixture is cooled to 40°C and the pH is adjusted to 6-7 with ethanolamine to obtain the polyether ester. The amount of the polyether ester used accounts for 10-50% of the total amount of the emulsion.

[0013] E. Fatty alcohol

[0014] The fatty alcohols described herein are monohydric to trihydric C16-C30 alcohols, including synthetic and natural fatty alcohols. Synthetic fatty alcohols can be obtained by oxidation of aluminum alkyls via the Ziegler process or by carbonyl synthesis; natural fatty alcohols can be extracted from oils and fats. Specifically, these fatty alcohols include those containing a single carbon atom, such as C16, C18, C20, C22, C24, C26, C28, and C30; as well as mixed fatty alcohols containing varying numbers of carbon atoms, such as C16-18 mixed alcohols and C16-22 mixed alcohols, one or more of which can be selected. The amount of fatty alcohol used should account for 15-25% of the total emulsion volume.

[0015] F. Inorganic salt solution

[0016] The inorganic salt in the present invention is selected from sodium chloride, sodium sulfate, sodium citrate, ammonium sulfate, sodium carbonate, and urea, with a concentration of 0.1-1.0 wt %. The amount of the inorganic salt solution used accounts for 2-5% of the total mass of the emulsion.

[0017] The present invention provides a method for preparing a composite emulsion. By using step-by-step emulsification, high-pressure homogenization, and low-temperature compounding processes, combined with the charge regulation effect of inorganic salts, the stability of the fatty alcohol-polyether ester composite emulsion is significantly improved. The specific steps include:

[0018] (1) Dissolve paraffin wax and nonionic emulsifier in 70-85℃ water and prepare paraffin wax emulsion (solid content 10-30%) by high-speed shearing (8000-12000 rpm).

[0019] (2) Dissolve the polyether ester and nonionic emulsifier in 40-50°C water, stir at low speed (500-1000 rpm) to prepare a polyether ester emulsion (solid content 5-35%), and cool to 10-25°C for use.

[0020] (3) Fatty alcohol pretreatment: Heat the fatty alcohol to 60-75°C to melt, mix it with paraffin emulsion at a mass ratio of 1:1-3, and pass it through a high-pressure homogenizer (pressure 50-100 MPa, cycle 2-3 times) to obtain a uniform emulsion.

[0021] (4) Low-temperature compounding and salt regulation: The homogenized fatty alcohol-paraffin emulsion is slowly added dropwise to the low-temperature polyether ester emulsion (dropping speed 1-2 mL / min, stirring rate 10000-30000 rpm), and then the inorganic salt solution is added. The mixture is stirred at 100-500 rpm for 30-60 min to finally obtain a stable composite emulsion, which is the fatty alcohol-polyether ester composite emulsion of the present invention.

[0022] Beneficial effects

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

[0024] 1. Use nonionic emulsifiers in steps to avoid competitive adsorption between components of different polarity;

[0025] 2. High-pressure homogenization improves the interfacial bonding strength between fatty alcohol and paraffin wax, reducing phase separation during polyetherester mixing;

[0026] 3. Low-temperature compounding reduces molecular thermal motion, and inorganic salts compress the double electrical layer through the "salting-out effect", synergistically improving the stability of the emulsion. DETAILED DESCRIPTION

[0027] The technical solutions of the present invention will be described clearly and completely below with reference to the embodiments. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0028] Preparation of polyetherester

[0029] In a 250ml four-necked flask equipped with a thermometer, electric stirrer, nitrogen protection, and reflux condenser, add polypropylene glycol (PPG2000), polyethylene glycol (PEG1000), adipic acid, and oleic acid in a molar ratio of 2:1:2:2. Add 0.3% p-toluenesulfonic acid by weight, stir, and purge with nitrogen. Heat to 150-200°C for 5 hours to allow the esterification reaction to proceed. The precipitated water condenses into a collector. After the reaction, cool the polyetherester to 40°C and adjust the pH to 6-7 with ethanolamine to obtain an amber-colored viscous solution.

[0030] Example 1

[0031] (1) 2 parts of microcrystalline paraffin and 0.8 parts of sorbitan monostearate (S-60) were dissolved in 70°C water and high-speed shearing (8000 rpm) was used to prepare paraffin emulsion M1 with a solid content of 10%.

[0032] (2) 10 parts of polyether ester and 0.5 parts of sorbitan monostearate (S-60) were dissolved in 40°C water, stirred at low speed (500 rpm) to prepare a polyether ester emulsion (solid content 19%), and cooled to 10°C to obtain low-temperature polyether ester emulsion N1.

[0033] (3) 15 parts of C16 alcohol were heated to 60°C to melt, mixed with paraffin emulsion M1 at a mass ratio of 1:1, and passed through a high-pressure homogenizer (pressure 50 MPa, 2 cycles) to obtain a uniform emulsion P1.

[0034] (4) The homogenized fatty alcohol-paraffin emulsion P1 was slowly added dropwise to the low-temperature polyether ester emulsion N1 (dropping speed 1 mL / min, stirring rate 10000 rpm), and then 3 parts of 0.1 wt% sodium chloride solution were added. The mixture was stirred at 100 rpm for 30 min to finally obtain a stable composite emulsion, which is the fatty alcohol-polyether ester composite emulsion Q1 of the present invention.

[0035] Example 2

[0036] (1) 8 parts of liquid paraffin and 2 parts of sorbitan monostearate polyoxyethylene ether ester (T-60) were dissolved in 75°C water and sheared at high speed (9000 rpm) to prepare paraffin emulsion M2 with a solid content of 25%.

[0037] (2) 12 parts of polyether ester and 1 part of sorbitan monostearate polyoxyethylene ether ester (T-60) were dissolved in 40°C water, stirred at low speed (600 rpm) to prepare a polyether ester emulsion (solid content 30%), and cooled to 15°C to obtain low-temperature polyether ester emulsion N2.

[0038] (3) 15 parts of C20 alcohol were heated to 65°C to melt, mixed with paraffin emulsion M2 at a mass ratio of 1:2, and passed through a high-pressure homogenizer (pressure 60 MPa, 3 cycles) to obtain a uniform emulsion P2.

[0039] (4) The homogenized fatty alcohol-paraffin emulsion P2 was slowly added dropwise to the low-temperature polyether ester emulsion N2 (dropping speed 2 mL / min, stirring rate 15000 rpm), and then 2 parts of 0.3 wt% sodium citrate solution were added. The mixture was stirred at 100 rpm for 60 min to finally obtain a stable composite emulsion, which is the fatty alcohol-polyether ester composite emulsion Q2 of the present invention.

[0040] Example 3

[0041] (1) 3 parts of microcrystalline paraffin and 2.5 parts of perchlorate o-20 were dissolved in 80℃ water and high-speed shearing (10000 rpm) was used to prepare paraffin emulsion M3 with a solid content of 27%.

[0042] (2) 18 parts of polyether ester and 0.5 parts of peregal-20 were dissolved in 40°C water, stirred at low speed (600 rpm) to prepare a polyether ester emulsion (solid content 31%), and cooled to 18°C ​​to obtain low-temperature polyether ester emulsion N3.

[0043] (3) 15 parts of C24 alcohol were heated to 70°C to melt, mixed with paraffin emulsion M3 at a mass ratio of 1:3, and passed through a high-pressure homogenizer (pressure 70 MPa, 2 cycles) to obtain a uniform emulsion P3.

[0044] (4) The homogenized fatty alcohol-paraffin emulsion P3 was slowly added dropwise to the low-temperature polyether ester emulsion N3 (dropping speed 2 mL / min, stirring rate 20000 rpm), and then 4 parts of 0.5 wt% sodium sulfate solution were added. The mixture was stirred at 200 rpm for 30 min to finally obtain a stable composite emulsion, which is the fatty alcohol-polyether ester composite emulsion Q3 of the present invention.

[0045] Example 4

[0046] (1) 3 parts of liquid paraffin and 5 parts of AEO-5 were dissolved in 85°C water and high-speed shearing (11,000 rpm) was used to prepare paraffin emulsion M4 with a solid content of 29%.

[0047] (2) 13 parts of polyether ester and 3 parts of AEO-5 were dissolved in 48°C water, stirred at low speed (800 rpm) to prepare a polyether ester emulsion (solid content 33%), and cooled to 20°C to obtain low-temperature polyether ester emulsion N4.

[0048] (3) 20 parts of C30 alcohol were heated to 75°C to melt, mixed with paraffin emulsion M4 at a mass ratio of 1:1, and passed through a high-pressure homogenizer (pressure 80 MPa, 3 cycles) to obtain a uniform emulsion P4.

[0049] (4) The homogenized fatty alcohol-paraffin emulsion P4 was slowly added dropwise to the low-temperature polyether ester emulsion N4 (dropping speed 2 mL / min, stirring rate 25000 rpm), and then 3 parts of 0.8 wt% urea solution were added. The mixture was stirred at 300 rpm for 30 min to finally obtain a stable composite emulsion, which is the fatty alcohol-polyether ester composite emulsion Q4 of the present invention.

[0050] Example 5

[0051] (1) 4 parts of microcrystalline paraffin and 1 part of fatty alcohol polyoxyethylene ether were dissolved in 78°C water and sheared at high speed (12000 rpm) to prepare paraffin emulsion M5 with a solid content of 19%.

[0052] (2) 13 parts of polyether ester and 1 part of fatty alcohol polyoxyethylene ether were dissolved in 43°C water, stirred at low speed (800 rpm) to prepare a polyether ester emulsion (solid content 32%), and cooled to 25°C to obtain low-temperature polyether ester emulsion N5.

[0053] (3) 25 parts of C16-22 mixed alcohol were heated to 68°C to melt, mixed with paraffin emulsion M5 at a mass ratio of 1:2, and passed through a high-pressure homogenizer (pressure 100 MPa, 2 cycles) to obtain a uniform emulsion P5.

[0054] (4) The homogenized fatty alcohol-paraffin emulsion P5 was slowly added dropwise to the low-temperature polyether ester emulsion N5 (dropping speed 2 mL / min, stirring rate 30000 rpm), followed by adding 4 parts of 1 wt% sodium carbonate solution, and stirring was continued at 500 rpm for 30 min to finally obtain a stable composite emulsion, namely the fatty alcohol-polyether ester composite emulsion Q5 of the present invention.

[0055] Comparative Example 1

[0056] (1) 2 parts of microcrystalline paraffin and 1.3 parts of sorbitan monostearate (S-60) were dissolved in 70°C water and high-speed shearing (8000 rpm) was used to prepare paraffin emulsion M6 with a solid content of 12%.

[0057] (2) 10 parts of polyether ester were dissolved in 40°C water, stirred at low speed (500 rpm) to prepare a polyether ester emulsion (solid content 18%), and cooled to 10°C to obtain low-temperature polyether ester emulsion N6.

[0058] (3) 15 parts of C16 alcohol were heated to 60°C to melt, mixed with paraffin emulsion M6 at a mass ratio of 1:1, and passed through a high-pressure homogenizer (pressure 50 MPa, 2 cycles) to obtain a uniform emulsion P6.

[0059] (4) The homogenized fatty alcohol-paraffin emulsion P6 was slowly added dropwise to the low-temperature polyether ester emulsion N6 (dropping speed 1 mL / min, stirring rate 10000 rpm), and then 3 parts of 0.1 wt% sodium chloride solution were added. The mixture was stirred at 100 rpm for 30 min to finally obtain a composite emulsion, which is the fatty alcohol-polyether ester composite emulsion Q6 of the present invention.

[0060] Comparative Example 2

[0061] (1) 8 parts of liquid paraffin and 2 parts of sorbitan monostearate polyoxyethylene ether ester (T-60) were dissolved in 75°C water and high-speed shearing (9000 rpm) was used to prepare paraffin emulsion M7 with a solid content of 25%.

[0062] (2) 12 parts of polyether ester and 1 part of sorbitan monostearate polyoxyethylene ether ester (T-60) were dissolved in 40°C water, stirred at low speed (600 rpm) to prepare a polyether ester emulsion (solid content 30%), and cooled to 15°C to obtain low-temperature polyether ester emulsion N7.

[0063] (3) 15 parts of C20 alcohol were heated to 65°C to melt, mixed with paraffin emulsion M7 at a mass ratio of 1:2, and stirred to obtain emulsion P7.

[0064] (4) The fatty alcohol-paraffin emulsion P7 was slowly added dropwise to the low-temperature polyether ester emulsion N2 (dropping speed 2 mL / min, stirring rate 15000 rpm), and then 2 parts of 0.3 wt% sodium citrate solution were added. The mixture was stirred at 100 rpm for 60 min to finally obtain a composite emulsion, which is the fatty alcohol-polyether ester composite emulsion Q7 of the present invention.

[0065] Comparative Example 3

[0066] (1) 8 parts of liquid paraffin and 2 parts of sorbitan monostearate polyoxyethylene ether ester (T-60) were dissolved in 75°C water and high-speed shearing (9000 rpm) was used to prepare paraffin emulsion M8 with a solid content of 25%.

[0067] (2) 12 parts of polyether ester and 1 part of sorbitan monostearate polyoxyethylene ether ester (T-60) were dissolved in 40°C water and stirred at low speed (600 rpm) to prepare a polyether ester emulsion (solid content 30%). The emulsion temperature was maintained at 40°C to obtain polyether ester emulsion N8.

[0068] (3) 15 parts of C20 alcohol were heated to 65°C to melt, mixed with paraffin emulsion M8 at a mass ratio of 1:2, and stirred to obtain emulsion P8.

[0069] (4) The fatty alcohol-paraffin emulsion P8 was slowly added dropwise to the polyether ester emulsion N8 (dropping speed 2 mL / min, stirring rate 15000 rpm), and then 2 parts of 0.3 wt% sodium citrate solution were added. The mixture was stirred at 100 rpm for 60 min to finally obtain a composite emulsion, which is the fatty alcohol-polyether ester composite emulsion Q8 of the present invention.

[0070] Comparative Example 4

[0071] (1) 3 parts of liquid paraffin and 5 parts of AEO-5 were dissolved in 85°C water and high-speed shearing (11,000 rpm) was used to prepare paraffin emulsion M9 with a solid content of 29%.

[0072] (2) 16 parts of polyether ester and 3 parts of AEO-5 were dissolved in 48°C water, stirred at low speed (800 rpm) to prepare a polyether ester emulsion (solid content 33%), and cooled to 20°C to obtain low-temperature polyether ester emulsion N9.

[0073] (3) 20 parts of C30 alcohol were heated to 75°C to melt, mixed with paraffin emulsion M9 at a mass ratio of 1:1, and passed through a high-pressure homogenizer (pressure 80 MPa, 3 cycles) to obtain a uniform emulsion P9.

[0074] (4) The homogenized fatty alcohol-paraffin emulsion P9 was slowly added dropwise to the low-temperature polyether ester emulsion N9 (dropping speed 2 mL / min, stirring rate 25000 rpm), and then continued to stir at 300 rpm for 30 min to finally obtain a composite emulsion, which is the fatty alcohol-polyether ester composite emulsion Q9 of the present invention.

[0075] Comparative Example 5

[0076] (1) 4 parts of microcrystalline paraffin and 1 part of fatty alcohol polyoxyethylene ether were dissolved in 78°C water and sheared at high speed (12000 rpm) to prepare paraffin emulsion M10 with a solid content of 19%.

[0077] (2) 13 parts of polyether ester and 1 part of fatty alcohol polyoxyethylene ether were dissolved in 43°C water, stirred at low speed (800 rpm) to prepare a polyether ester emulsion (solid content 32%), and cooled to 25°C to obtain low-temperature polyether ester emulsion N10.

[0078] (3) 25 parts of C16-22 mixed alcohol were heated to 68°C to melt, mixed with paraffin emulsion M10 at a mass ratio of 1:2, and passed through a high-pressure homogenizer (pressure 100 MPa, 2 cycles) to obtain a uniform emulsion P10.

[0079] (4) The homogenized fatty alcohol-paraffin emulsion P5 was slowly added dropwise to the low-temperature polyether ester emulsion N10 (dropping speed 2 mL / min, stirring rate 30000 rpm), followed by adding 4 parts of 1 wt% sodium acetate solution, and stirring was continued at 500 rpm for 30 min to finally obtain a stable composite emulsion, namely the fatty alcohol-polyether ester composite emulsion Q10 of the present invention.

[0080] Comparative Example 6

[0081] (1) 4 parts of microcrystalline wax, 2 parts of fatty alcohol polyoxyethylene ether, 13 parts of polyether ester, 25 parts of C16-22 mixed alcohol, and 4 parts of 1 wt% urea solution were mixed and stirred to obtain a composite emulsion, namely the fatty alcohol-polyether ester composite emulsion Q11 of the present invention.

[0082] Performance Testing

[0083] 1. Centrifugal stability test

[0084] 10 ml of the composite emulsion was measured in two 10 ml centrifuge tubes, respectively, and placed symmetrically in a centrifuge. The tubes were spun continuously at 3500 rpm for 15 minutes. The tubes were visually inspected and the lower layer of liquid was less than 0.5 ml, indicating that the test tubes passed the test. The test results are shown in Table 1.

[0085] Table 1 Centrifugal stability test

[0086]

[0087] 2. Viscosity test

[0088] The viscosity of the prepared composite emulsion was tested at 25°C using a Brookfield DV2T viscometer with a #3 rotor and 60 rpm. Over-range or pasting is indicated by a "——" symbol. The test results are shown in Table 2.

[0089] Table 2 Viscosity test results at 25°C

[0090]

[0091] 3. Foam suppression performance test

[0092] Main instruments: portable circulating bubbler

[0093] Test conditions: temperature 20°C, flow rate 9L / min, defoamer addition amount: 5ul

[0094] Test medium: corrugated paper white water

[0095] Specific test method: Clean the portable circulating bubbler, add the specified amount of foaming medium, heat to the set temperature, start the flow pump, and circulate the bubbler at the set flow rate until the foam volume reaches 200ml. Then, add the specified amount of defoamer sample and record the change in foam volume V over time. The lower the foam height over the same time period, the better the defoaming and antifoaming performance. The test results are shown in Table 3.

[0096]

Claims

1. A method for preparing a fatty alcohol-polyether ester composite emulsion according to the present invention is characterized in that: The specific steps are as follows: (1) Paraffin wax and nonionic emulsifier were dissolved in 70-85°C water and high-speed shearing (8000-12000 rpm) was used to prepare paraffin wax emulsion (solid content 10-30%). (2) Dissolve the polyether ester and nonionic emulsifier in 40-50°C water, stir at low speed (500-1000 rpm) to prepare a polyether ester emulsion (solid content 5-35%), and cool to 10-25°C for use; (3) Fatty alcohol pretreatment: heat the fatty alcohol to 60-75°C to melt, mix it with paraffin wax emulsion at a mass ratio of 1:1-3, and pass it through a high-pressure homogenizer (pressure 50-100 MPa, cycle 2-3 times) to obtain a uniform emulsion; (4) Low-temperature compounding and salt regulation: The homogenized fatty alcohol-paraffin emulsion is slowly added dropwise to the low-temperature polyether ester emulsion (dropping speed 1-2 mL / min, stirring rate 10000-30000 rpm), and then the inorganic salt solution is added. The mixture is stirred at 100-500 rpm for 30-60 min to finally obtain a stable composite emulsion, which is the fatty alcohol-polyether ester composite emulsion of the present invention. The fatty alcohol-polyether ester composite emulsion is composed of the following components: The amount of paraffin wax in component A is 2-8% of the total mass of the fatty alcohol-polyether ester composite emulsion; The dosage of component B non-ionic emulsifier is 0.1-10% of the total mass of fatty alcohol-polyether ester composite emulsion; The amount of water in component C is 50-70% of the total mass of the fatty alcohol-polyether ester composite emulsion; The amount of component D polyether ester is 10-50% of the total mass of the fatty alcohol-polyether ester composite emulsion; The amount of fatty alcohol in component E is 15-25% of the total mass of the fatty alcohol-polyether ester composite emulsion; The dosage of the inorganic salt solution of component F is 2-5% of the total mass of the fatty alcohol-polyether ester composite emulsion.

2. The method for preparing a fatty alcohol-polyether ester composite emulsion according to claim 1, wherein the paraffin wax of component A is a hydrocarbon extracted from petroleum, shale oil or other asphalt mineral oil, such as microcrystalline paraffin or liquid paraffin.

3. A fatty alcohol-polyether ester composite emulsion according to claim 1, characterized in that the non-ionic emulsifier of component B is a commonly used non-ionic surfactant selected from sorbitan monostearate (S-60), sorbitan monooleate (S-80), sorbitan monostearate polyoxyethylene ether ester (T-60), sorbitan monooleate polyoxyethylene ether ester (T-80), fatty alcohol polyoxyethylene ether, oleic acid polyoxyethylene ether, castor oil polyoxyethylene ether, alkylphenol polyoxyethylene ether, peregal O-15, peregal O-20, peregal O-25, peregal O-50, AEO-3, AEO-5, AEO-7, AEO-9, AEO-10, AEO-15, AEO-20, and AEO-22; the non-ionic emulsifier is used in two steps, represented by B1 and B2 respectively.

4. A fatty alcohol-polyether ester composite emulsion according to claim 1, characterized in that the component C water is used in two parts, represented by C1 and C2 respectively.

5. A fatty alcohol-polyether ester composite emulsion according to claim 1, characterized in that the polyether ester of component D is prepared by a technology known in the art, namely, polypropylene glycol, polyethylene glycol, dibasic acid, and fatty acid are prepared in a molar ratio of 2-5:1:2-3:2-3.5 in a nitrogen atmosphere with p-toluenesulfonic acid as a catalyst, heated to 150-200° C. and stirred for reaction for 5-8 hours. After the reaction is completed, the mixture is cooled to 40° C. and the pH is adjusted to 6-7 with ethanolamine to obtain the polyether ester.

6. A fatty alcohol-polyether ester composite emulsion according to claim 1, characterized in that the fatty alcohol of component E is a monohydric to trihydric alcohol of C16-C30, including synthetic fatty alcohols and natural fatty alcohols; the synthetic fatty alcohols can be obtained by oxidation of alkyl aluminum by the Ziegler method or by carbonyl synthesis; the natural fatty alcohols can be obtained by extraction from oils and fats; specifically, the fatty alcohols include fatty alcohols containing a single carbon atom, such as C16 alcohol, C18 alcohol, C20 alcohol, C22 alcohol, C24 alcohol, C26 alcohol, C28 alcohol, and C30 alcohol; and mixed fatty alcohols containing different numbers of carbon atoms, such as C16-18 mixed alcohol and C16-22 mixed alcohol, one or more of which are selected.

7. A fatty alcohol-polyether ester composite emulsion according to claim 1, characterized in that the inorganic salt of component F is selected from sodium chloride, sodium sulfate, sodium citrate, ammonium sulfate, sodium carbonate, and urea, and has a concentration of 0.1-1.0 wt%.

Images