Preparation method of acrylate polymer leveling agent

Abstract

The invention relates to a preparation method of an acrylic polymer leveling agent, which comprises the following steps: polymerizing different types of (methyl) acrylic acid low-carbon alkyl ester monomers, olefin monomers and vinyl silicone resin in a polyhydroxy polyether solvent under the action of an initiator to obtain a polymer 1; polymerizing different types of hydroxyalkyl acrylate in a polyhydroxy polyether solvent under the action of an initiator to obtain a polymer 2; finally, the polymer 1 and the polymer 2 are compounded to obtain the flatting agent, vinyl silicone resin is introduced into the polymer 1, wetting of the flatting agent on a substrate and shrinkage cavity elimination are promoted, a layer of low-surface-energy interface is formed on the surface of a coating film, and therefore the surface state of the coating film is controlled, and the coating film has a good anti-corrosion effect. The problems of orange peel, shrinkage cavity, flooding and floating, sagging, brush marks and the like on the surface of the coating film are avoided; the polyhydroxy polyether solvent is introduced in the polymer synthesis process, so that the compatibility and the leveling performance of the leveling agent are improved.

Description

Technical Field

[0001] The invention relates to the technical field of leveling agent preparation, in particular to an acrylic ester leveling agent. Background Art

[0002] Leveling agent is a commonly used paint additive, which can help the paint form a flat, smooth and uniform coating during the drying process, effectively reduce the surface tension of the coating liquid, and improve its leveling and uniformity. Depending on the type of paint, the type of leveling agent is also different.

[0003] According to the different chemical structures, there are three main categories of leveling agents: acrylic, silicone and fluorocarbon. Acrylic leveling agents can promote the flow and leveling of the coating. The compatibility of acrylic leveling agents is an important indicator of their ability to control the surface state of the coating. If the compatibility is too good, it will dissolve in the coating and will not form a new interface on the surface of the coating, and it will not provide a leveling effect; if the compatibility is too poor, it will not be evenly distributed on the surface of the coating, and it will gather together, which is easy to produce shrinkage defects. It will reduce the gloss of the coating and produce adverse side effects such as haze. Only with ideal controlled compatibility can a new interface layer be formed on the surface of the coating to play a leveling role.

[0004] In CN115820026A, a leveling component and a pre-coating component are used to cooperate with each other for leveling. The pre-coating component can pre-treat the surface to be leveled in advance, so that the leveling component can help the leveling component to be leveled. The pre-coating component is a hydrochloric acid aqueous solution and / or ethanol, and the leveling agent component is a polyether-modified polyacrylate. The pre-treatment with a hydrochloric acid aqueous solution and / or ethanol affects the compatibility of the system and may cause shrinkage defects. In CN111925485A, a (methyl) hydroxyalkyl acrylate monomer and an acrylate monomer containing vinyl silane are obtained by copolymerization with other copolymer monomers. The leveling agent has a hydroxyl group and a silane structure, which effectively improves the compatibility and wettability of the coating composition. The wettability of the leveling agent The effect needs to be further improved; in CN108276516A, 1,4-bis(o-cyanophenylvinyl)benzene with fluorescent effect is introduced into polyacrylate leveling agent by chemical combination, and the fluorescent properties of 1,4-bis(o-cyanophenylvinyl)benzene are not destroyed, so as to obtain polyacrylate leveling agent with fluorescent effect. Although the leveling agent has fluorescent effect, the main leveling effect is the polyacrylate material, and the wetting effect of the leveling agent needs to be improved; in CN107083100A, the polyether-modified polyacrylate leveling agent can increase the surface tension and polarity of the coating surface after the coating film is dried, so that the recoating of the paint film is not affected, and the adhesion between the coatings can be improved. The compatibility of the leveling agent is improved, but the wettability needs to be improved. Summary of the invention

[0005] The invention relates to a method for preparing an acrylic polymer leveling agent. Different types of (meth)acrylic acid low-carbon alkyl ester monomers, olefin monomers and vinyl silicone resins are polymerized in a polyhydroxy polyether solvent under the action of an initiator to obtain a polymer 1; different types of hydroxyalkyl acrylates are polymerized in a polyhydroxy polyether solvent under the action of an initiator to obtain a polymer 2; finally, the polymer 1 and the polymer 2 are compounded to obtain a leveling agent, wherein the introduction of the vinyl silicone resin in the polymer 1 promotes the wetting of the leveling agent on a substrate and eliminates shrinkage cavities, and forms a layer of low surface energy interface on the surface of a coating film, thereby controlling the surface state of the coating film and avoiding problems such as orange peel, shrinkage cavities, floating color, sagging, brush marks, etc. on the surface of the coating film; the polyhydroxy polyether solvent is introduced in the polymer synthesis process to improve the compatibility and leveling performance of the leveling agent. Technical Solution

[0006] A method for preparing an acrylic polymer leveling agent, which is obtained by compounding polymer A and polymer B, wherein the amount of polymer A accounts for 50-90% of the total mass of the leveling agent; the amount of polymer B accounts for 10-50% of the total mass of the leveling agent; The polymer A is obtained by polymerizing a (meth) acrylic acid low carbon alkyl ester monomer, an olefin monomer, and a vinyl silicone resin in a polyhydroxy polyether solvent through the action of an initiator; The polymer B is obtained by polymerizing hydroxyalkyl acrylate in a polyhydroxy polyether solvent through the action of an initiator.

[0007] The components in polymer A are calculated by weight: 100 parts of (meth)acrylic acid low alkyl ester monomer, 10-30 parts of olefin monomer, 2%-8% of the sum of (meth)acrylic acid low alkyl ester monomer and olefin monomer; 0.1%-1% of the sum of (meth)acrylic acid low alkyl ester monomer and olefin monomer; and 100-160% of the sum of (meth)acrylic acid low alkyl ester monomer and olefin monomer. The components in polymer B are calculated by weight: 100 parts of hydroxyalkyl acrylate, 0.1%-1% of the initiator, and 100-150% of the polyol polyether. The (meth)acrylic acid lower alkyl ester monomer is selected from one or more of methyl acrylate, ethyl acrylate, butyl acrylate, isooctyl methacrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, propyl methacrylate and amyl acrylate; The structural formula of olefin monomer is: CH2=CHR 1 , where R 1 is a straight or branched chain alkyl group of 4 to 10 carbon atoms; Vinyl Silicone Resin R2 c R 3 d SiO (4-c-d) / 2 , where R 2 With R 3 may be the same or different, and are vinyl or monovalent saturated hydrocarbon groups having 1 to 3 carbon atoms, and R 2 With R 3 The total number of vinyl groups is ≥ 1, subscript c is 0, 1, 2 or 3; subscript d is 0, 1, 2 or 3; the vinyl content of the vinyl silicone resin is 0.2-1.2wt% The structural formula of the polyhydroxy polyether is HOCH2CH(OH)CHO(CH2CHO)nCH2CHOHCH2OH, wherein n is an integer of 4-20; The hydroxyalkyl acrylate is selected from one or more of hydroxyethyl acrylate, hydroxypropyl acrylate, hydroxybutyl acrylate, hydroxyethyl methacrylate, and hydroxypropyl methacrylate; The initiator is a peroxide or an azo free radical initiator, specifically selected from 2,2'-azobis(2-methylpropionitrile), 2,2'-azobis(2,4-dimethylvaleronitrile), 2,2'-azobis(2-methylbutyronitrile), and benzoyl peroxide.

[0008] A method for preparing an acrylic polymer leveling agent is as follows: (1) Preparing a mixture A: mixing an initiator uniformly in a portion of a polyhydroxy polyether solvent so that the initiator is completely dissolved to form a mixture a1; mixing a (meth)acrylic acid low carbon alkyl ester monomer, an olefin monomer, and a vinyl silicone resin uniformly in the remaining hydroxy polyether solvent to form a mixture a2; adding the mixture a1 dropwise to the mixture a2 at a temperature of 60 to 100° C., and controlling the adding time to be 1 to 5 hours to obtain a mixture A; (2) Preparing mixture B: mixing the initiator uniformly in a part of the polyhydroxy polyether solvent so that the initiator is completely dissolved to form a mixture b1; mixing the hydroxyalkyl acrylate uniformly in the polyhydroxy polyether solvent to form a mixture b2; adding the mixture b1 dropwise to the mixture b2 at a temperature of 60 to 100° C., and controlling the adding time to be 1 to 5 hours to obtain a mixture B; (3) The mixture A and the mixture B are mixed and evenly prepared to obtain an acrylic polymer leveling agent. DETAILED DESCRIPTION Example

[0010] (1) Preparation of mixture A1: 0.11 parts of initiator benzoyl peroxide was mixed evenly with 10 parts of polyhydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO)4CH2CHOHCH2OH, so that the initiator was completely dissolved, to form mixture a1-1; 100 parts of a mixture of methyl acrylate and isooctyl methacrylate, 10 parts of an olefin monomer CH2=CHC4H9, and 2.2 parts of a vinyl silicone resin having a vinyl content of 0.2% were mixed evenly with the remaining 100 parts of hydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO)4CH2CHOHCH2OH, to form mixture a2-1; mixture a1-1 was added dropwise to mixture a2-1 at a temperature of 60°C, and the adding time was controlled to be 5 hours, to obtain mixture A1; (2) Preparation of mixture B1: 0.1 parts of initiator benzoyl peroxide was mixed evenly with 10 parts of polyhydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO)4CH2CHOHCH2OH until the initiator was completely dissolved, thereby forming mixture b1-1; 100 parts of hydroxyethyl acrylate was mixed evenly with the remaining 90 parts of polyhydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO)4CH2CHOHCH2OH, thereby forming mixture b2-1; mixture b1-1 was added dropwise to mixture b2-1 at a temperature of 60°C, and the adding time was controlled to be 5 hours, thereby obtaining mixture B1; (3) 50 parts of mixture A1 and 50 parts of mixture B1 were mixed and evenly prepared to obtain an acrylic polymer leveling agent. Example

[0011] (1) Preparation of mixture A2: 0.6 parts of initiator 2,2'-azobis(2-methylbutyronitrile) was mixed evenly with 10 parts of polyhydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO)8CH2CHOHCH2OH until the initiator was completely dissolved to form mixture a1-2; 100 parts of ethyl acrylate and 20 parts of olefin monomer CH2=CHC6H 13 , 6 parts of a vinyl silicone resin having a vinyl content of 0.4% are uniformly mixed with the remaining 146 parts of a hydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO)8CH2CHOHCH2OH to form a mixture a2-2; at a temperature of 70°C, the mixture a1-2 is added dropwise to the mixture a2-2, and the dropping time is controlled to be 4 hours to obtain a mixture A2; (2) Preparation of mixture B2: 0.3 parts of initiator 2,2'-azobis(2-methylbutyronitrile) was mixed evenly with 10 parts of polyhydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO)8CH2CHOHCH2OH until the initiator was completely dissolved, thereby forming mixture b1-2; 100 parts of hydroxypropyl methacrylate was mixed evenly with the remaining 100 parts of polyhydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO)8CH2CHOHCH2OH, thereby forming mixture b2-2; mixture b1-2 was added dropwise to mixture b2-2 at a temperature of 70°C, and the adding time was controlled to be 4 hours, thereby obtaining mixture B2; (3) 60 parts of mixture A2 and 40 parts of mixture B2 were mixed and evenly prepared to obtain an acrylic polymer leveling agent. Example

[0012] (1) Preparation of mixture A3: 1.3 parts of initiator 2,2'-azobis(2,4-dimethylvaleronitrile) in 10 parts of polyhydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO) 12 Mix CH2CHOHCH2OH evenly to make the initiator completely dissolved to form a mixture a1-3; 100 parts of a mixture of butyl methacrylate and butyl acrylate, 30 parts of an olefin monomer CH2=CHC8H 17 10.4 parts of vinyl silicone resin with a vinyl content of 0.6% and the remaining 198 parts of hydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO) 12 CH2CHOHCH2OH was mixed evenly to form a mixture a2-3; at a temperature of 80°C, the mixture a1-3 was added dropwise to the mixture a2-3, and the dropping time was controlled to be 3h to obtain a mixture A3; (2) Preparation of mixture B3: 0.5 parts of initiator 2,2'-azobis(2,4-dimethylvaleronitrile) in 10 parts of polyhydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO) 12 Mix evenly in CH2CHOHCH2OH until the initiator is completely dissolved to form a mixture b1-3; add 100 parts of a mixture of hydroxybutyl acrylate and hydroxyethyl methacrylate to the remaining 115 parts of a polyhydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO) 12 The mixture in CH2CHOHCH2OH was uniform to form a mixture b2-3; the mixture b1-3 was added dropwise to the mixture b2-3 at a temperature of 80°C, and the dropping time was controlled to be 3h to obtain a mixture B3; (3) 70 parts of mixture A3 and 30 parts of mixture B3 were mixed and evenly prepared to obtain an acrylic polymer leveling agent. Example

[0013] (1) Preparation of mixture A4: 0.69 parts of initiator 2,2'-azobis(2-methylpropionitrile) in 10 parts of polyhydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO) 16 Mix CH2CHOHCH2OH evenly to make the initiator completely dissolved to form a mixture a1-4; 100 parts of a mixture of methyl methacrylate and ethyl methacrylate, 15 parts of an olefin monomer CH2=CHC 10 H 21 3.45 parts of vinyl silicone resin with a vinyl content of 0.8% and the remaining 128 parts of hydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO) 16 CH2CHOHCH2OH was mixed evenly to form a mixture a2-4; at a temperature of 90°C, the mixture a1-4 was added dropwise to the mixture a2-4, and the dropping time was controlled to be 2h to obtain a mixture A4; (2) Preparation of mixture B4: 0.8 parts of initiator 2,2'-azobis(2-methylpropionitrile) in 10 parts of polyhydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO) 16 Mix evenly in CH2CHOHCH2OH until the initiator is completely dissolved to form a mixture b1-4; add 100 parts of a mixture of hydroxyethyl acrylate and hydroxypropyl acrylate to the remaining 130 parts of a polyhydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO) 16 The mixture in CH2CHOHCH2OH was uniform to form a mixture b2-4; the mixture b1-4 was added dropwise to the mixture b2-4 at a temperature of 90°C, and the dropping time was controlled to be 2h to obtain a mixture B4; (3) 80 parts of mixture A4 and 20 parts of mixture B4 were mixed and evenly prepared to obtain an acrylic polymer leveling agent. Example

[0014] (1) Preparation of mixture A5: 1 part of initiator benzoyl peroxide in 10 parts of polyhydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO) 20 Mix CH2CHOHCH2OH evenly to make the initiator completely dissolved to form a mixture a1-5; 100 parts of a mixture of propyl methacrylate and pentyl acrylate, 25 parts of an olefin monomer CH2=CHC7H 15 , 7.5 parts of vinyl silicone resin with a vinyl content of 1.2% and the remaining 177.5 parts of hydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO) 20CH2CHOHCH2OH was mixed evenly to form a mixture a2-5; at a temperature of 100°C, the mixture a1-5 was added dropwise to the mixture a2-5, and the dropping time was controlled to be 1 hour to obtain a mixture A5; (2) Preparation of mixture B5: 1 part of initiator benzoyl peroxide in 10 parts of polyhydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO) 20 Mix evenly in CH2CHOHCH2OH until the initiator is completely dissolved to form a mixture b1-5; add 100 parts of hydroxyethyl methacrylate to the remaining 140 parts of polyhydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO) 20 The mixture in CH2CHOHCH2OH was uniform to form a mixture b2-5; at a temperature of 100°C, the mixture b1-5 was added dropwise to the mixture b2-5, and the dropping time was controlled to be 1 hour to obtain a mixture B5; (3) 90 parts of mixture A5 and 10 parts of mixture B5 were mixed and evenly prepared to obtain an acrylic polymer leveling agent.

[0015] Comparative Example 1 (1) Preparation of mixture A6: 0.11 parts of initiator benzoyl peroxide was mixed evenly with 10 parts of polyhydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO)4CH2CHOHCH2OH, so that the initiator was completely dissolved, to form mixture a1-1; 100 parts of a mixture of methyl acrylate and isooctyl methacrylate, 10 parts of an olefin monomer CH2=CHC4H9, and 2.2 parts of a vinyl silicone resin having a vinyl content of 0.2% were mixed evenly with the remaining 100 parts of hydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO)4CH2CHOHCH2OH, to form mixture a2-6; mixture a1-1 was added dropwise to mixture a2-6 at a temperature of 60°C, and the adding time was controlled to be 5 hours, to obtain mixture A6; (2) Preparation of mixture B1: 0.1 parts of initiator benzoyl peroxide was mixed evenly with 10 parts of polyhydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO)4CH2CHOHCH2OH until the initiator was completely dissolved, thereby forming mixture b1-1; 100 parts of hydroxyethyl acrylate was mixed evenly with the remaining 90 parts of polyhydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO)4CH2CHOHCH2OH, thereby forming mixture b2-1; mixture b1-1 was added dropwise to mixture b2-1 at a temperature of 60°C, and the adding time was controlled to be 5 hours, thereby obtaining mixture B1; (3) 50 parts of mixture A6 and 50 parts of mixture B1 were mixed and evenly prepared to obtain an acrylic polymer leveling agent.

[0016] Comparative Example 2 (1) Preparation of mixture A7: 0.6 parts of initiator 2,2'-azobis(2-methylbutyronitrile) was mixed evenly with 10 parts of polyethylene glycol until the initiator was completely dissolved to form mixture a1-6; 100 parts of ethyl acrylate and 20 parts of olefin monomer CH2=CHC6H 13 , 6 parts of vinyl silicone resin with a vinyl content of 0.4% are mixed evenly with the remaining 146 parts of polyethylene glycol to form a mixture a2-7; at a temperature of 70° C., the mixture a1-6 is added dropwise to the mixture a2-7, and the adding time is controlled to be 4 hours to obtain a mixture A7; (2) Preparation of mixture B6: 0.3 parts of initiator 2,2'-azobis(2-methylbutyronitrile) was mixed evenly in 10 parts of polyethylene glycol until the initiator was completely dissolved, thereby forming mixture b1-6; 100 parts of hydroxypropyl methacrylate was mixed evenly in the remaining 100 parts of polyethylene glycol, thereby forming mixture b2-6; mixture b1-6 was added dropwise to mixture b2-6 at a temperature of 70°C, and the adding time was controlled to be 4 hours, thereby obtaining mixture B6; (3) 60 parts of mixture A7 and 40 parts of mixture B6 were mixed and evenly prepared to obtain an acrylic polymer leveling agent.

[0017] Comparative Example 3 (1) Preparation of mixture A3: 1.3 parts of initiator 2,2'-azobis(2,4-dimethylvaleronitrile) in 10 parts of polyhydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO) 12 Mix CH2CHOHCH2OH evenly to make the initiator completely dissolved to form a mixture a1-3; 100 parts of a mixture of butyl methacrylate and butyl acrylate, 30 parts of an olefin monomer CH2=CHC8H 17 10.4 parts of vinyl silicone resin with a vinyl content of 0.6% and the remaining 198 parts of hydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO) 12 CH2CHOHCH2OH was mixed evenly to form a mixture a2-3; at a temperature of 80°C, the mixture a1-3 was added dropwise to the mixture a2-3, and the dropping time was controlled to be 3h to obtain a mixture A3; (2) 100 parts of mixture A3 was used as the final acrylic polymer leveling agent.

[0018] Comparative Example 4 (1) Preparation of mixture B4: 0.8 parts of initiator 2,2'-azobis(2-methylpropionitrile) in 10 parts of polyhydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO) 16Mix evenly in CH2CHOHCH2OH until the initiator is completely dissolved to form a mixture b1-4; add 100 parts of a mixture of hydroxyethyl acrylate and hydroxypropyl acrylate to the remaining 130 parts of a polyhydroxy polyether solvent HOCH2CH(OH)CHO(CH2CHO) 16 The mixture in CH2CHOHCH2OH was uniform to form a mixture b2-4; the mixture b1-4 was added dropwise to the mixture b2-4 at a temperature of 90°C, and the dropping time was controlled to be 2h to obtain a mixture B4; (3) 100 parts of mixture A4 was used as the final acrylic polymer leveling agent.

[0019] Performance Testing Add 150g of laboratory self-prepared varnish into a 1000ml stainless steel cup, then add 0.05g of leveling agent, and use a sample without leveling agent as a blank sample. Use a laboratory high-speed disperser to disperse at a speed of 500r / min for 5 minutes, stop and let it stand for 10 minutes, take out a small amount and place it on a glass plate, use a 75um wet film preparation device to scrape the paint at a uniform speed, judge the flatness and transparency of the coating, and make a record. The smaller the number of leveling performance, the better the leveling performance; the higher the shrinkage level, the better the compatibility.

[0020] Coating grade classification

[0021] Test results:

Claims

1. A method for preparing an acrylic polymer leveling agent, characterized in that: It is obtained by compounding polymer A and polymer B, wherein the amount of polymer A accounts for 50-90% of the total mass of the leveling agent; the amount of polymer B accounts for 10-50% of the total mass of the leveling agent; polymer A is obtained by polymerizing (meth) acrylic acid low carbon alkyl ester monomer, olefin monomer, vinyl silicone resin in a polyhydroxy polyether solvent through the action of an initiator; polymer B is obtained by polymerizing hydroxyalkyl acrylate in a polyhydroxy polyether solvent through the action of an initiator.

2. The method for preparing an acrylic polymer leveling agent according to claim 1, characterized in that: The components in the polymer A are calculated by mass as follows: 100 parts of the (meth)acrylate low-carbon alkyl ester monomer, 10-30 parts of the olefin monomer, 2%-8% of the sum of the (meth)acrylate low-carbon alkyl ester monomer and the olefin monomer; 0.1%-1% of the sum of the (meth)acrylate low-carbon alkyl ester monomer and the olefin monomer; and 100-160% of the sum of the (meth)acrylate low-carbon alkyl ester monomer and the olefin monomer.

3. The method for preparing an acrylic polymer leveling agent according to claim 1, characterized in that: The components in polymer B are calculated by weight: 100 parts of hydroxyalkyl acrylate, the amount of initiator used is 0.1%-1% of hydroxyalkyl acrylate; the amount of polyhydroxy polyether used is 100-150% of hydroxyalkyl acrylate.

4. The method for preparing an acrylic polymer leveling agent according to claim 1, characterized in that: The (meth)acrylic acid lower alkyl ester monomer is selected from one or more of methyl acrylate, ethyl acrylate, butyl acrylate, isooctyl methacrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, propyl methacrylate and pentyl acrylate.

5. The method for preparing an acrylic polymer leveling agent according to claim 1, characterized in that: The structural formula of olefin monomer is: CH2=CHR 1 , where R 1 It is a straight chain or branched chain alkyl group having 4 to 10 carbon atoms.

6. The method for preparing an acrylic polymer leveling agent according to claim 1, characterized in that: Vinyl Silicone Resin R 2 c R 3 d SiO (4-c-d) / 2 , where R 2 With R 3 may be the same or different, and are vinyl or monovalent saturated hydrocarbon groups having 1 to 3 carbon atoms, and R 2 With R 3 The total number of vinyl groups is ≥1, subscript c is 0, 1, 2 or 3; subscript d is 0, 1, 2 or 3; and the vinyl content of the vinyl silicone resin is 0.2-1.2wt%.

7. The method for preparing an acrylic polymer leveling agent according to claim 1, characterized in that: The structural formula of the polyhydroxy polyether is HOCH2CH(OH)CHO(CH2CHO)nCH2CHOHCH2OH, wherein n is an integer of 4-20.

8. The method for preparing an acrylic polymer leveling agent according to claim 1, characterized in that: The hydroxyalkyl acrylate is selected from one or more of hydroxyethyl acrylate, hydroxypropyl acrylate, hydroxybutyl acrylate, hydroxyethyl methacrylate, and hydroxypropyl methacrylate.

9. The method for preparing an acrylic polymer leveling agent according to claim 1, characterized in that: The initiator is a peroxide or an azo free radical initiator, specifically selected from 2,2'-azobis(2-methylpropionitrile), 2,2'-azobis(2,4-dimethylvaleronitrile), 2,2'-azobis(2-methylbutyronitrile), and benzoyl peroxide.

10. A method for preparing an acrylic polymer leveling agent is as follows: (1) Preparing a mixture A: mixing an initiator uniformly in a portion of a polyhydroxy polyether solvent so that the initiator is completely dissolved to form a mixture a1; mixing a (meth)acrylic acid low carbon alkyl ester monomer, an olefin monomer, and a vinyl silicone resin uniformly in the remaining hydroxy polyether solvent to form a mixture a2; adding the mixture a1 dropwise to the mixture a2 at a temperature of 60 to 100° C., and controlling the adding time to be 1 to 5 hours to obtain a mixture A; (2) Preparing mixture B: mixing the initiator uniformly in a part of the polyhydroxy polyether solvent so that the initiator is completely dissolved to form a mixture b1; mixing the hydroxyalkyl acrylate uniformly in the polyhydroxy polyether solvent to form a mixture b2; adding the mixture b1 dropwise to the mixture b2 at a temperature of 60 to 100° C., and controlling the adding time to be 1 to 5 hours to obtain a mixture B; (3) The mixture A and the mixture B are mixed and evenly prepared to obtain an acrylic polymer leveling agent.

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