High-stability reactive high-molecular surfactant and preparation method thereof

Abstract

The invention relates to the technical field of surfactants, and particularly discloses a high-stability reactive high-molecular surfactant and a preparation method thereof. The surfactant is prepared from the following raw materials in parts by mass: 50 to 60 parts of allyl polyoxyethylene ether, 20 to 30 parts of dodecyl acrylate, 5 to 10 parts of trifluoroethyl methacrylate, 50 to 60 parts of SO3 compound, 0.5 to 1 part of chain transfer agent, 0.1 to 0.3 part of initiator, 0.2 to 0.5 part of synergist and 15 to 20 parts of deionized water. According to the invention, the reaction type high-molecular surfactant with the amphiphilic block structure is formed, so that the water molecule penetration is reduced, the water resistance of the emulsion is obviously improved, the water molecule penetration is reduced, and the water resistance of the emulsion is obviously improved. Moreover, the viscosity of the emulsion is kept stable under high shear force, so that the mechanical stability of the emulsion can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of surfactants, in particular to a high-stability reactive polymer surfactant and a preparation method thereof. Background Art

[0002] Surfactants, as an important class of functional materials, are widely used in industrial production and daily life. Traditional surfactants include anionic, nonionic, cationic, and zwitterionic types. However, due to their low molecular weight, they generally suffer from chemical instability and susceptibility to environmental conditions (such as temperature, pH, and salt concentration). They are particularly susceptible to molecular chain breakage or aggregation failure under high temperature, high salt, or extreme pH conditions.

[0003] Related art discloses a method for preparing a rosin-based polyester-type polymer surfactant, characterized by: a first step, under nitrogen protection, with the mass ratio of acrylic acid to rosin being 1:(4-5), the amount of the polymerization inhibitor hydroquinone being 0.2-0.5% of the total mass of the reactants, the reaction temperature being 180-230°C, and the reaction time being 4-6 hours, to obtain acrylic rosin; a second step, an esterification reaction of the acrylic rosin with polyethylene glycol, and the addition of a catalyst, with the ratio of the amount of carboxyl groups in the acrylic rosin to the amount of hydroxyl groups in the polyethylene glycol being 1:(1-1.5), the catalyst being one of phosphoric acid, p-toluenesulfonic acid, and zinc oxide, the amount being 0.2-0.5% of the total mass of the reactants, the reaction temperature being 250-280°C, and the reaction time being 6-10 hours, until the acid value is less than 10 mg / gKOH, to obtain polyacrylic rosin polyethylene glycol ester, i.e., a rosin-based polyester-type polymer surfactant. The molecular weight range of this type of polymer surfactant is 1770-5071; the critical micelle concentration is 0.33-0.87 g / L, the surface tension is 37.1-39.1 mN / m; the concentration of the surfactant aqueous solution is 20 g / L, the shear rate is 600 s-1h, and the shear resistance range is 1.01-1.2 Pa.

[0004] However, the above-mentioned polymer surfactants use strong acid catalysts such as phosphoric acid and p-toluenesulfonic acid. If the acid catalysts are not completely removed, the surfactants may hydrolyze during application. Moreover, their shear resistance range is 1.01-1.2Pa, which may not meet the mechanical stability requirements in high-shear industrial scenarios such as oil field flooding and high-speed dispersion of coatings. Summary of the Invention

[0005] In order to improve the water resistance and mechanical stability of the emulsion of a polymer surfactant, the present application provides a high-stability reactive polymer surfactant and a preparation method.

[0006] In the first aspect, the present application provides a highly stable reactive polymer surfactant, which adopts the following technical solution:

[0007] A high-stability reactive polymer surfactant comprises the following raw materials in parts by weight: 50-60 parts of allyl polyoxyethylene ether, 20-30 parts of dodecyl acrylate, 5-10 parts of trifluoroethyl methacrylate, 50-60 parts of SO3 complex, 0.5-1 part of chain transfer agent, 0.1-0.3 part of initiator, 0.2-0.5 part of synergist, and 15-20 parts of deionized water.

[0008] By adopting the above technical solution, the allyl group of allyl polyoxyethylene ether provides a polymerization site, and the terminal hydroxyl group of allyl polyoxyethylene ether reacts with the SO3 complex to generate allyl polyoxyethylene ether sulfate. The initiator triggers free radical polymerization, and the long alkyl chain of dodecyl acrylate forms an amphiphilic block structure with allyl polyoxyethylene ether sulfate. Trifluoroethyl methacrylate and dodecyl acrylate synergistically form a double hydrophobic barrier of alkyl chain + fluorocarbon chain, and the chain transfer agent can control the molecular weight, ensure the uniform size of the micelles, and reduce the aggregation of emulsion particles. The synergist and allyl polyoxyethylene ether sulfate form mixed micelles, which keep the viscosity of the emulsion stable under high shear force. Therefore, by adopting the above raw material ratio, the present application can form a reactive polymer surfactant with an amphiphilic block structure, wherein the hydrophilic segment is polyoxyethylene ether and sulfate ion, the hydrophobic segment is a long alkyl chain and fluorocarbon chain, and the polymerizable group is an allyl group. The hydrophilic segments provide water solubility and electrostatic repulsion, while the hydrophobic segments form a dense hydrophobic core, helping to reduce water molecule penetration and significantly improving the water resistance of the emulsion. The allyl group participates in the reaction during emulsion polymerization, anchoring the surfactant to the surface of the emulsion particles, maintaining stable viscosity under high shear forces, and thus improving the mechanical stability of the surfactant.

[0009] In a specific embodiment, the SO3 complex comprises SO3 and an aprotic solvent in a molar ratio of 1:(1.1-1.2), and the aprotic solvent is dichloromethane or 1,2-dichloroethane.

[0010] By adopting the above technical solution, pure SO3 easily spontaneously polymerizes into sulfur trioxide polymers, and the reaction activity is uncontrollable, which may lead to excessive sulfonation or even decomposition of the allyl polyoxyethylene ether backbone. Dichloromethane or 1,2-dichloroethane stabilizes the SO3 monomer through weak solvation, inhibiting its self-polymerization, allowing the sulfonation reaction to occur at the target hydroxyl site and reducing the production of byproducts. The present application found that the use of the SO3 complex with the above ratio can further improve the water resistance and mechanical stability of the emulsion.

[0011] In a specific embodiment, the chain transfer agent is (α,α'-dimethyl-α"-acetoxy) trithiocarbonate.

[0012] By adopting this technical solution, the trithiocarbonate group of (α,α'-dimethyl-α"-acetoxy) trithiocarbonate can regulate the free radical polymerization process, narrowing the molecular weight distribution to 1.1-1.3, ensuring uniform surfactant micelle size, and significantly improving mechanical stability. Furthermore, the trithiocarbonate group is more resistant to hydrolysis than ordinary thioesters, making it suitable for aqueous reaction systems and reducing the risk of chain transfer agent degradation.

[0013] In a specific embodiment, the synergist is polyether-modified polysiloxane.

[0014] By adopting this technical solution, the hydrophobic segments of polysiloxane can reduce the surface tension of the emulsion, making it easier to spread and helping to reduce the aggregation of latex particles. Furthermore, the high flexibility of the polysiloxane segments enables the emulsion to self-heal through molecular chain rearrangement at microscopic cracks, helping to improve the emulsion's water resistance.

[0015] In a specific embodiment, 2-5 parts of N-hydroxymethyl acrylamide are further included.

[0016] By adopting this technical solution, N-hydroxymethyl acrylamide contains methylol and acrylamide double bonds, possessing both crosslinking and polymerizability. The acrylamide double bonds participate in free radical copolymerization and embed into the polymer backbone. Under acidic or high-temperature conditions, the methylol groups undergo dehydration and condensation to form a crosslinked network. This crosslinked network narrows the gaps between polymer chains, helping to improve the emulsion's water resistance. Furthermore, crosslinking connects emulsion particles through covalent bonds, reducing particle aggregation caused by shear forces and thereby enhancing mechanical stability.

[0017] In a specific embodiment, 3-8 parts of octamethylcyclotetrasiloxane are also included.

[0018] By employing this technical solution, octamethylcyclotetrasiloxane undergoes ring-opening polymerization under acidic or alkaline conditions to generate linear polysiloxane segments. These segments can migrate to the interface to form a hydrophobic layer, forming a fluorine-silicon dual hydrophobic barrier with the fluorocarbon chains, thereby improving the emulsion's water resistance. Furthermore, the high flexibility of the siloxane chains can absorb mechanical stress, helping to reduce viscosity fluctuations in the emulsion under high shear conditions and improving mechanical stability.

[0019] In a specific embodiment, 3-5 parts of epoxidized soybean oil acrylate are further included.

[0020] By employing this technical solution, the double bonds of epoxidized soybean oil acrylate copolymerize with allyl polyoxyethylene ether, uniformly embedding them into the polymer network. Under acidic or high-temperature conditions, the epoxy groups react with hydroxymethyl or Si-OH groups of siloxanes, increasing the crosslink density. The fatty acid segments of epoxidized soybean oil acrylate synergize with the long alkyl and fluorocarbon chains to form a dense hydrophobic layer, thereby further improving the emulsion's water resistance.

[0021] In a second aspect, the present application provides a method for preparing a highly stable reactive polymer surfactant, which adopts the following technical solution:

[0022] A method for preparing a highly stable reactive polymer surfactant comprises the following steps:

[0023] S1. Mixing allyl polyoxyethylene ether and SO3 complex at 30-40° C., stirring for 2-2.5 hours while controlling the pH to be less than 2, and adjusting the pH to 6-7 to obtain allyl polyoxyethylene ether sulfate;

[0024] S2. Add allyl polyoxyethylene ether sulfate, lauryl acrylate, and trifluoroethyl methacrylate into deionized water and stir until completely dissolved to obtain a mixed solution;

[0025] S3. Add a chain transfer agent to the mixed solution, raise the temperature to 50-55°C under nitrogen protection, add an initiator dropwise while stirring, keep the temperature and react for 6-8 hours, dialyze, add a synergist, stir evenly, and concentrate to a solid content of 40-50% to obtain a highly stable reactive polymer surfactant.

[0026] By adopting the above technical solution, step S1 is carried out at pH <2 and 30-40°C to avoid decomposition or self-polymerization of allyl polyoxyethylene ether, which helps to retain the allyl active site. SO3 preferentially attacks the hydroxyl group at the end of allyl polyoxyethylene ether at 30-40°C, rather than the main chain ether bond, to ensure the accuracy of the sulfonation site. The pH is adjusted to 6-7 to generate allyl polyoxyethylene ether sulfate. After mixing the raw materials in step S2, free radical polymerization is initiated at 50-55°C in step S3. The chain transfer agent controls the molecular weight to ensure uniform micelle size. Dialysis can remove unreacted monomers and salts, and concentrate to a solid content of 40-50%, which can avoid excessive viscosity caused by excessive solid content.

[0027] In a specific embodiment, the S2 step is as follows: add allyl polyoxyethylene ether sulfate, lauryl acrylate, trifluoroethyl methacrylate, N-hydroxymethyl acrylamide, octamethylcyclotetrasiloxane and epoxy soybean oil acrylate into deionized water, and stir until completely dissolved to obtain a mixed solution.

[0028] In summary, this application has the following beneficial effects:

[0029] 1. This application forms a reactive polymer surfactant with an amphiphilic block structure, which helps reduce water molecule penetration and significantly improves the water resistance of the emulsion. Moreover, the viscosity of the emulsion remains stable under high shear forces, thereby also improving the mechanical stability of the emulsion.

[0030] 2. In this application, N-hydroxymethyl acrylamide, octamethylcyclotetrasiloxane and epoxy soybean oil acrylate are preferably used to help further improve the water resistance and mechanical stability of the emulsion. DETAILED DESCRIPTION

[0031] Unless otherwise specified, the raw materials used in this application are all purchased from the market. Among them, allyl polyoxyethylene ether is APEG-500. The CAS number of dodecyl acrylate is 2156-97-0. The CAS number of trifluoroethyl methacrylate is 352-87-4. The CAS number of (α,α'-dimethyl-α"-acetoxy) trithiocarbonate is 955120-40-0. The model of polyether-modified polysiloxane is XH6290J3ZZO5. The CAS number of 2-(dodecylthiothiocarbonylthio)-2-methylpropionic acid N-succinimidyl ester is 925232-64-0. The CAS number of N-hydroxymethyl acrylamide is 924-42-5. The CAS number of octamethylcyclotetrasiloxane is 556-67-2. The model of epoxy soybean oil acrylate is EBECRYL 5848.

[0032] The present application is further described in detail below with reference to the following examples and comparative examples.

[0033] Example

[0034] Example 1

[0035] This embodiment provides a highly stable reactive polymer surfactant using the following raw materials: 55 kg of allyl polyoxyethylene ether, 25 kg of dodecyl acrylate, 7.5 kg of trifluoroethyl methacrylate, 55 kg of SO3 complex, 0.8 kg of (α,α'-dimethyl-α"-acetoxy) trithiocarbonate, 0.2 kg of azobisisobutyronitrile, 0.3 kg of polyether-modified polysiloxane, and 17.5 kg of deionized water. The SO3 complex comprises SO3 and dichloromethane in a molar ratio of 1:1.1.

[0036] The preparation method of the high stability reactive polymer surfactant adopts the following steps:

[0037] S1. Heat the SO3 complex to 35°C. While keeping the temperature high, add allyl polyoxyethylene ether to the SO3 complex, and stir continuously for 2.3 hours at a pH value less than 2. Then, add sodium hydroxide solution while stirring to adjust the pH value to 7 to obtain allyl polyoxyethylene ether sulfate.

[0038] S2. Add allyl polyoxyethylene ether sulfate, lauryl acrylate, and trifluoroethyl methacrylate into deionized water, and stir until completely dissolved to obtain a mixed solution.

[0039] S3. Then, add (α,α'-dimethyl-α"-acetoxy) trithiocarbonate to the mixed solution, heat to 53°C under nitrogen protection, and add azobisisobutyronitrile dropwise while stirring. After the addition is completed, keep warm and let it react for 7 hours, then dialyze to remove unreacted monomers and salts. Then add polyether-modified polysiloxane, stir evenly, and concentrate to a solid content of 45% to obtain a highly stable reactive polymer surfactant.

[0040] Example 2

[0041] The only difference between this embodiment and Example 1 is that the high-stability reactive polymer surfactant uses the following raw materials: 50 kg of allyl polyoxyethylene ether, 30 kg of dodecyl acrylate, 10 kg of trifluoroethyl methacrylate, 50 kg of SO3 complex, 1 kg of (α,α'-dimethyl-α"-acetoxy) trithiocarbonate, 0.3 kg of azobisisobutyronitrile, 0.5 kg of polyether-modified polysiloxane, and 20 kg of deionized water.

[0042] Example 3

[0043] The only difference between this embodiment and Example 1 is that the high-stability reactive polymer surfactant uses the following raw materials: 60 kg of allyl polyoxyethylene ether, 20 kg of dodecyl acrylate, 5 kg of trifluoroethyl methacrylate, 60 kg of SO3 complex, 0.5 kg of (α,α'-dimethyl-α"-acetoxy) trithiocarbonate, 0.1 kg of azobisisobutyronitrile, 0.2 kg of polyether-modified polysiloxane, and 15 kg of deionized water.

[0044] Example 4

[0045] The only difference between this embodiment and embodiment 1 is that the SO3 complex includes SO3 and dichloromethane in a molar ratio of 1:1.15.

[0046] Example 5

[0047] The only difference between this embodiment and embodiment 1 is that the SO3 complex includes SO3 and dichloromethane in a molar ratio of 1:1.2.

[0048] Example 6

[0049] The only difference between this embodiment and embodiment 1 is that the SO3 complex includes SO3 and 1,2-dichloroethane in a molar ratio of 1:1.1.

[0050] Example 7

[0051] This example differs from Example 1 only in that an equal amount of 2-(dodecylthiocarbonylthio)-2-methylpropionic acid N-succinimidyl ester is used to replace (α,α'-dimethyl-α"-acetoxy) trithiocarbonate.

[0052] Example 8

[0053] The only difference between this embodiment and embodiment 1 is that the polyether-modified polysiloxane is replaced by an equal amount of hyperbranched GEMIGI foam-free surfactant (model 31766).

[0054] Example 9

[0055] The only difference between this embodiment and Example 1 is that the high-stability reactive polymer surfactant uses the following raw materials: 55 kg of allyl polyoxyethylene ether, 25 kg of dodecyl acrylate, 7.5 kg of trifluoroethyl methacrylate, 55 kg of SO3 complex, 0.8 kg of (α,α'-dimethyl-α"-acetoxy) trithiocarbonate, 0.2 kg of azobisisobutyronitrile, 0.3 kg of polyether-modified polysiloxane, 17.5 kg of deionized water, and 3 kg of N-hydroxymethyl acrylamide.

[0056] In the preparation method of a highly stable reactive polymer surfactant, step S2 is as follows: allyl polyoxyethylene ether sulfate, lauryl acrylate, trifluoroethyl methacrylate, and N-hydroxymethyl acrylamide are added to deionized water and stirred until completely dissolved to obtain a mixed solution.

[0057] Example 10

[0058] The only difference between this embodiment and Example 1 is that the high-stability reactive polymer surfactant uses the following raw materials: 55 kg of allyl polyoxyethylene ether, 25 kg of dodecyl acrylate, 7.5 kg of trifluoroethyl methacrylate, 55 kg of SO3 complex, 0.8 kg of (α, α'-dimethyl-α"-acetoxy) trithiocarbonate, 0.2 kg of azobisisobutyronitrile, 0.3 kg of polyether-modified polysiloxane, 17.5 kg of deionized water, and 5 kg of octamethylcyclotetrasiloxane.

[0059] In the preparation method of a highly stable reactive polymer surfactant, step S2 is as follows: allyl polyoxyethylene ether sulfate, lauryl acrylate, trifluoroethyl methacrylate, and octamethylcyclotetrasiloxane are added to deionized water and stirred until completely dissolved to obtain a mixed solution.

[0060] Example 11

[0061] The only difference between this embodiment and Example 1 is that the high-stability reactive polymer surfactant uses the following raw materials: 55 kg of allyl polyoxyethylene ether, 25 kg of dodecyl acrylate, 7.5 kg of trifluoroethyl methacrylate, 55 kg of SO3 complex, 0.8 kg of (α,α'-dimethyl-α"-acetoxy) trithiocarbonate, 0.2 kg of azobisisobutyronitrile, 0.3 kg of polyether-modified polysiloxane, 17.5 kg of deionized water, and 4 kg of epoxy soybean oil acrylate.

[0062] In the preparation method of a highly stable reactive polymer surfactant, step S2 is as follows: allyl polyoxyethylene ether sulfate, lauryl acrylate, trifluoroethyl methacrylate, and epoxy soybean oil acrylate are added to deionized water and stirred until completely dissolved to obtain a mixed solution.

[0063] Example 12

[0064] The only difference between this embodiment and Example 1 is that the high-stability reactive polymer surfactant uses the following raw materials: 55 kg of allyl polyoxyethylene ether, 25 kg of dodecyl acrylate, 7.5 kg of trifluoroethyl methacrylate, 55 kg of SO3 complex, 0.8 kg of (α,α'-dimethyl-α"-acetoxy) trithiocarbonate, 0.2 kg of azobisisobutyronitrile, 0.3 kg of polyether-modified polysiloxane, 17.5 kg of deionized water, 3 kg of N-hydroxymethyl acrylamide, and 5 kg of octamethylcyclotetrasiloxane.

[0065] In the preparation method of a highly stable reactive polymer surfactant, step S2 is as follows: allyl polyoxyethylene ether sulfate, lauryl acrylate, trifluoroethyl methacrylate, N-hydroxymethyl acrylamide, and octamethylcyclotetrasiloxane are added to deionized water and stirred until completely dissolved to obtain a mixed solution.

[0066] Example 13

[0067] The only difference between this embodiment and Example 1 is that the high-stability reactive polymer surfactant uses the following raw materials: 55 kg of allyl polyoxyethylene ether, 25 kg of dodecyl acrylate, 7.5 kg of trifluoroethyl methacrylate, 55 kg of SO3 complex, 0.8 kg of (α, α'-dimethyl-α"-acetoxy) trithiocarbonate, 0.2 kg of azobisisobutyronitrile, 0.3 kg of polyether-modified polysiloxane, 17.5 kg of deionized water, 3 kg of N-hydroxymethyl acrylamide, 5 kg of octamethylcyclotetrasiloxane, and 4 kg of epoxy soybean oil acrylate.

[0068] In the preparation method of a highly stable reactive polymer surfactant, step S2 is as follows: allyl polyoxyethylene ether sulfate, lauryl acrylate, trifluoroethyl methacrylate, N-hydroxymethyl acrylamide, octamethylcyclotetrasiloxane, and epoxy soybean oil acrylate are added to deionized water and stirred until completely dissolved to obtain a mixed solution.

[0069] Example 14

[0070] The only difference between this embodiment and embodiment 1 is that the preparation method of the highly stable reactive polymer surfactant adopts the following steps:

[0071] S1. Heat the SO3 complex to 30°C. While keeping the temperature high, add allyl polyoxyethylene ether to the SO3 complex, and stir continuously for 2.5 hours at a pH value less than 2. Then, add sodium hydroxide solution while stirring to adjust the pH value to 7 to obtain allyl polyoxyethylene ether sulfate.

[0072] S2. Add allyl polyoxyethylene ether sulfate, lauryl acrylate, and trifluoroethyl methacrylate into deionized water, and stir until completely dissolved to obtain a mixed solution.

[0073] S3. Then, add (α,α'-dimethyl-α"-acetoxy) trithiocarbonate to the mixed solution, heat to 50°C under nitrogen protection, and add azobisisobutyronitrile dropwise while stirring. After the addition is completed, keep warm and let it react for 8 hours, then dialyze to remove unreacted monomers and salts. Then add polyether-modified polysiloxane, stir evenly, and concentrate to a solid content of 40% to obtain a highly stable reactive polymer surfactant.

[0074] Example 15

[0075] The only difference between this embodiment and embodiment 1 is that the preparation method of the highly stable reactive polymer surfactant adopts the following steps:

[0076] S1. Heat the SO3 complex to 40°C. While keeping the temperature high, add allyl polyoxyethylene ether to the SO3 complex, control the pH to be less than 2, and stir continuously for 2 hours. Then, add sodium hydroxide solution while stirring to adjust the pH to 6 to obtain allyl polyoxyethylene ether sulfate.

[0077] S2. Add allyl polyoxyethylene ether sulfate, lauryl acrylate, and trifluoroethyl methacrylate into deionized water, and stir until completely dissolved to obtain a mixed solution.

[0078] S3. Then, add (α,α'-dimethyl-α"-acetoxy) trithiocarbonate to the mixed solution, heat to 55°C under nitrogen protection, and add azobisisobutyronitrile dropwise while stirring. After the addition is completed, keep warm and let it react for 6 hours, then dialyze to remove unreacted monomers and salts. Then add polyether-modified polysiloxane, stir evenly, and concentrate to a solid content of 50% to obtain a highly stable reactive polymer surfactant.

[0079] Comparative Example

[0080] Comparative Example 1

[0081] The only difference between this comparative example and Example 1 is that an equal amount of allyl polyoxyethylene ether is used to replace dodecyl acrylate.

[0082] Comparative Example 2

[0083] The only difference between this comparative example and Example 1 is that trifluoroethyl methacrylate is replaced by an equal amount of allyl polyoxyethylene ether.

[0084] Comparative Example 3

[0085] The only difference between this comparative example and Example 1 is that the SO3 complex is replaced by an equal amount of allyl polyoxyethylene ether.

[0086] Comparative Example 4

[0087] The only difference between this comparative example and Example 1 is that an equal amount of SO3 is used to replace the SO3 complex.

[0088] Comparative Example 5

[0089] The only difference between this comparative example and Example 1 is that the polyether-modified polysiloxane is replaced by an equal amount of allyl polyoxyethylene ether.

[0090] Comparative Example 6

[0091] The only difference between this comparative example and Example 1 is that an equal amount of allyl polyoxyethylene ether is used to replace (α,α'-dimethyl-α"-acetoxy) trithiocarbonate.

[0092] Performance testing

[0093] For Examples 1-15 and Comparative Examples 1-6, the following performance tests were performed:

[0094] Water resistance test: A highly stable reactive polymer surfactant was coated onto a polytetrafluoroethylene sheet. After drying at room temperature for 24 hours, the sheet was oven-cured at 80°C for 2 hours to form a uniform film with a thickness of 0.5 ± 0.1 mm. The uniform film was immersed in 25°C deionized water. After 24 hours, the film was removed, the surface moisture was blotted with filter paper, and the film was immediately weighed. Calculate and record the water absorption of the uniform film. Water absorption = (weight after immersion - weight before immersion) / weight before immersion × 100%. Lower water absorption indicates better water resistance.

[0095] Mechanical Stability Test: Use a Brookfield viscometer (spindle LV3, 60 rpm) to measure the initial viscosity of the high-stability reactive polymer surfactant. Treat at a high shear rate of 600 s⁻¹ for 30 minutes, then retest the viscosity. Calculate and record the viscosity retention rate. Viscosity retention rate = post-shear viscosity / pre-shear viscosity × 100%. A higher viscosity retention rate indicates better mechanical stability.

[0096] The test results are shown in Table 1.

[0097] Table 1

[0098]

[0099]

[0100] Combining Example 1 with Comparative Examples 1-6 and Table 1, it can be seen that compared to Example 1, the water absorption rates of Examples 1-6 were significantly increased, and the viscosity retention rates were significantly decreased. This indicates that the raw material ratio of Example 1 helps reduce the water absorption rate of the highly stable reactive polymeric surfactant and reduces the viscosity fluctuation of the highly stable reactive polymeric surfactant under high shear forces. Therefore, the raw material ratio of Example 1 helps improve the water resistance and mechanical stability of the polymeric surfactant emulsion.

[0101] As can be seen from Examples 1-15 and Table 1, the water absorption rates of Examples 1-15 were all below 4%, and the viscosity retention rates were all above 90%. This indicates that using the raw material ratios within the ranges of Examples 1-15 can help improve the water resistance and mechanical stability of the polymer surfactant emulsion.

[0102] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A highly stable reactive polymer surfactant, characterized in that: The method comprises the following raw materials in parts by weight: 50-60 parts of allyl polyoxyethylene ether, 20-30 parts of dodecyl acrylate, 5-10 parts of trifluoroethyl methacrylate, 50-60 parts of SO3 complex, 0.5-1 part of chain transfer agent, 0.1-0.3 part of initiator, 0.2-0.5 part of synergist and 15-20 parts of deionized water.

2. The highly stable reactive polymer surfactant according to claim 1, characterized in that The SO3 complex comprises SO3 and an aprotic solvent in a molar ratio of 1:(1.1-1.2), and the aprotic solvent is dichloromethane or 1,2-dichloroethane.

3. The highly stable reactive polymer surfactant according to claim 1, wherein The chain transfer agent is (α,α'-dimethyl-α"-acetoxy) trithiocarbonate.

4. The highly stable reactive polymer surfactant according to claim 1, characterized in that The synergist is polyether-modified polysiloxane.

5. The highly stable reactive polymer surfactant according to claim 1, characterized in that Also included is N-methylol acrylamide.

6. The highly stable reactive polymer surfactant according to claim 5, characterized in that Also included is octamethylcyclotetrasiloxane.

7. The highly stable reactive polymer surfactant according to claim 6, characterized in that Also included are epoxidized soybean oil acrylates.

8. A method for preparing a highly stable reactive polymer surfactant according to any one of claims 1 to 7, characterized in that: The steps include: S1. Mixing allyl polyoxyethylene ether and SO3 complex at 30-40° C., stirring for 2-2.5 hours while controlling the pH to be less than 2, and adjusting the pH to 6-7 to obtain allyl polyoxyethylene ether sulfate; S2. Add allyl polyoxyethylene ether sulfate, lauryl acrylate, and trifluoroethyl methacrylate into deionized water and stir until completely dissolved to obtain a mixed solution; S3. Add a chain transfer agent to the mixed solution, raise the temperature to 50-55°C under nitrogen protection, add an initiator dropwise while stirring, keep the temperature and react for 6-8 hours, dialyze, add a synergist, stir evenly, and concentrate to a solid content of 40-50% to obtain a highly stable reactive polymer surfactant.

9. The method for preparing a highly stable reactive polymer surfactant according to claim 8, wherein: The S2 step is as follows: adding allyl polyoxyethylene ether sulfate, lauryl acrylate, trifluoroethyl methacrylate, N-hydroxymethyl acrylamide, octamethylcyclotetrasiloxane and epoxy soybean oil acrylate into deionized water, stirring until completely dissolved to obtain a mixed solution.

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