Corrosion-resistant ASA water tank and preparation method thereof

Abstract

The invention discloses a corrosion-resistant ASA water tank and a preparation method thereof, and relates to the field of ASA resin. A corrosion-resistant ASA water tank comprises a surface layer and a base material layer, the base material layer is made of low-density PVC resin, and the surface layer is prepared from, by weight, 100 parts of modified ASA resin; 1 to 2.2 parts of a silane coupling agent; 5-8 parts of a hydrophobic filler; 0.3 to 0.7 part of an antioxidant; 0.6 to 0.9 part of an ultraviolet light absorber; and 0.2 to 0.4 part of a lubricant. The anti-yellowing performance, the hydrophobicity and the corrosion resistance of an existing ASA water tank are further improved.

Description

Technical Field

[0001] This invention relates to the field of ASA resin, and in particular to a corrosion-resistant ASA water tank and its preparation method. Background Technology

[0002] ASA resin, or polybutyl acrylate-styrene-acrylonitrile resin, is an engineering plastic formed by free radical polymerization of monomers such as acrylate, styrene, and acrylonitrile. It is a two-phase blend resin with a "sea-island" structure, where the continuous phase is the matrix resin SAN and the dispersed phase is polyacrylate rubber particles. Because acrylate rubber does not contain reactive double bonds, ASA resin exhibits excellent weather resistance and is widely used in automotive exterior parts, resin tiles, and antenna radomes.

[0003] ASA gutters are used in roof drainage systems for self-built houses and are specifically designed for gutter drainage. An ASA gutter consists of a surface layer and a base layer. The surface material is made of ASA resin, primarily providing weather resistance, UV resistance, and corrosion resistance. The base layer is made of low-density PVC material, providing structural support and sufficient rigidity and impact resistance to ensure smooth drainage.

[0004] Current ASA water tanks are designed for long-term outdoor use, and their performance in terms of resistance to yellowing, hydrophobicity, and corrosion needs further improvement. Summary of the Invention

[0005] To further improve the yellowing resistance, hydrophobicity, and corrosion resistance of existing ASA water tanks, this application provides a corrosion-resistant ASA water tank and its preparation method.

[0006] This application provides a corrosion-resistant ASA water tank and its preparation method, which adopts the following technical solution: In a first aspect, this application provides a corrosion-resistant ASA water tank, comprising a surface layer and a substrate layer. The substrate layer is made of low-density PVC resin, and the surface layer comprises the following raw materials in parts by weight: 100 parts modified ASA resin; 1-2.2 parts silane coupling agent; 5-8 parts hydrophobic filler; 0.3-0.7 parts antioxidant; 0.6-0.9 parts ultraviolet absorber; and 0.2-0.4 parts lubricant. The modified ASA resin is prepared through the following steps: Preparation of PBA latex: Under nitrogen protection, add 100-120 parts of deionized water, 1.5-3 parts of emulsifier, 0.3-0.5 parts of initiator, 50-60 parts of butyl acrylate, and 2-5 parts of crosslinking agent to a four-necked flask in sequence, stir evenly and heat to 70-80℃, and react for 3-4 hours to obtain PBA latex. PBA latex agglomeration: Under nitrogen protection, add a portion of butyl acrylate, a portion of deionized water, and a portion of emulsifier to a flask. Heat to 70-75℃ and pre-emulsify for 30-40 minutes, then add 0.1-0.3 parts of initiator. Separately, mix the remaining butyl acrylate, 0.5-2 parts of hexafluorobutyl acrylate, 1-4 parts of methacrylic acid, the remaining deionized water, and the remaining emulsifier to form a dropping solution. The total amount of butyl acrylate is 20-26 parts, the total amount of deionized water is 50-55 parts, and the total amount of emulsifier is 0.5-0.8 parts. Slowly add the dropping solution to the above solution and react for 4-5 hours to obtain the agglomerating agent. At room temperature and pressure, the agglomerating agent is added dropwise to PBA latex while stirring continuously. The weight of the agglomerating agent is 13%-20% of the PBA latex, and the addition time is 1-1.5 hours. Then, the reaction is continued for 1 hour to obtain the agglomerated emulsion. Graft polymerization: Mix 1-1.5 parts of initiator, 0.5-1 part of tert-dodecyl mercaptan, 22-40 parts of styrene, 15-28 parts of acrylonitrile, and 2-6 parts of carboxyl-containing graft monomer, and add dropwise to the agglomeration emulsion. Heat to 75-90℃ and keep warm for 0.5-2 hours to obtain modified ASA emulsion. Blending and granulation: The modified ASA emulsion is demulsified, washed, and dried to obtain the modified ASA copolymer, and 30-45 parts of the copolymer are then granulated. The modified ASA copolymer and 55-70 parts of SAN resin are mixed evenly, and then melt-blended and granulated to obtain the modified ASA resin.

[0007] By adopting the above technical solution, in the corrosion-resistant ASA water tank of this application, modified ASA resin is selected as the main resin for the surface layer. Modified ASA resin has better corrosion resistance. Combined with hydrophobic fillers, silane coupling agents are used to improve the compatibility and dispersibility of hydrophobic fillers in modified ASA resin. The hydrophobic fillers improve the hydrophobicity of the water tank surface layer, further enhancing corrosion resistance. The addition of antioxidants and ultraviolet absorbers can improve the yellowing resistance of the water tank surface layer, and the addition of lubricants improves the dispersion effect of hydrophobic fillers, which is beneficial to the processing and extrusion performance of the surface raw materials.

[0008] In the preparation of modified ASA resin, an emulsion grafting blending method was employed. An agglomeration method was used to increase the particle size of the PBA latex, ensuring sufficient impact strength in the resulting ASA resin. The agglomerant used in this application is a polymeric emulsion of butyl acrylate-methacrylic acid-hexafluorobutyl acrylate. The introduction of hexafluorobutyl acrylate introduces organic fluorine into the polyacrylate rubber particles, improving water resistance and corrosion resistance, and reducing the adsorption and penetration of water molecules on the material surface. In addition to acrylonitrile and styrene, carboxyl-containing graft monomers were added during graft polymerization. The resulting modified ASA polymer contains carboxyl monomers, which can form active sites. When blended with SAN resin, these sites generate hydrogen bonds or dipole forces, improving the interfacial strength between the modified ASA polymer and SAN resin, and enhancing the mechanical properties of the tank surface. Increasing the acrylonitrile content in the modified ASA resin improves its rigidity and corrosion resistance.

[0009] Optionally, the hydrophobic filler is selected from one or more of nano-silica, vitrified microspheres, and nano-ceramic powder.

[0010] Optionally, the hydrophobic filler is a mixture of nano zinc oxide and nano ceramic powder, and the weight ratio of nano zinc oxide to nano ceramic powder is (2-2.8):1.

[0011] By adopting the above technical solution, the hydrophobic filler is a mixture of nano zinc oxide and nano ceramic powder. The nano ceramic powder contains substances such as nano silicon dioxide, which can form a three-dimensional network barrier layer in the resin matrix to capture corrosive media such as chloride ions, thereby improving the corrosion resistance of the water tank surface.

[0012] Optionally, the crosslinking agent is selected from one or more of butyl diacrylate, 1,6-hexanediol diacrylate, and ethylene glycol dimethacrylate.

[0013] By adopting the above technical solution, the use of crosslinking agent enables latex particles to achieve slight crosslinking during polymerization, which facilitates subsequent graft polymerization.

[0014] Optionally, the carboxyl-containing grafted monomer is selected from one or more of maleic anhydride and acrylic acid.

[0015] By adopting the above technical solution, carboxyl-grafted monomers are introduced into the modified ASA emulsion, which improves the reactivity and enhances the interfacial bonding strength with SAN resin.

[0016] Optionally, the antioxidant is a mixture of hindered phenolic antioxidant and antioxidant 168 in a weight ratio of (1.2-1.6):1.

[0017] By adopting the above technical solution and combining two antioxidants, the anti-yellowing performance of modified ASA resin can be improved, and the surface of the sink will not turn yellow in long-term outdoor environments.

[0018] Optionally, the ultraviolet absorber is a benzotriazole ultraviolet absorber, and the lubricant is ethylene bis-stearamide.

[0019] Optionally, the emulsifier is selected from two or more of sodium dodecylbenzenesulfonate, sodium dodecyl sulfate, OP-10, and sodium polyoxyethylene ether sulfate, and the initiator is selected from one or more of sodium persulfate, tert-butyl peroxide, potassium persulfate, and redox initiators.

[0020] Secondly, this application discloses a method for preparing a corrosion-resistant ASA water tank, comprising the following steps: Modified ASA resin, silane coupling agent, hydrophobic filler, antioxidant, ultraviolet absorber and lubricant are put into a high-speed mixer and mixed for 7-10 minutes. The mixture is then conveyed to a granulator, extruded and granulated, then drawn, cooled and pelletized to obtain ASA co-extruded material. ASA co-extruded material and low-density PVC resin as the main substrate are combined through a co-extrusion mold, and after cooling, vacuum shaping, traction, and cutting, a corrosion-resistant ASA water tank is obtained.

[0021] By adopting the above technical solution, the ASA surface layer is combined with the PVC substrate through a co-extrusion process to form a lightweight, high-strength, corrosion-resistant, and yellowing-resistant water trough, which is suitable for the design requirements of gutter drainage and has excellent weather resistance.

[0022] In summary, this application has at least one of the following beneficial effects: 1. In the corrosion-resistant ASA water tank of this application, modified ASA resin is selected as the main resin for the surface layer. Modified ASA resin has better corrosion resistance. Combined with hydrophobic fillers, silane coupling agents are used to improve the compatibility and dispersibility of hydrophobic fillers in modified ASA resin. The hydrophobic fillers improve the hydrophobicity of the water tank surface layer, further enhancing corrosion resistance. The addition of antioxidants and ultraviolet absorbers can improve the yellowing resistance of the water tank surface layer. The addition of lubricants improves the dispersion effect of hydrophobic fillers and facilitates the processing and extrusion performance of the surface raw materials.

[0023] 2. In the preparation of modified ASA resin, an emulsion grafting method was adopted. An agglomeration method was used to increase the particle size of the PBA latex, ensuring that the resulting ASA resin has sufficient impact strength. The agglomerant used in this application is a polymeric emulsion of butyl acrylate-methacrylic acid-hexafluorobutyl acrylate. The introduction of hexafluorobutyl acrylate introduces organic fluorine into the polyacrylate rubber particles, improving water resistance and corrosion resistance, and reducing the adsorption and penetration of water molecules on the material surface. In addition to acrylonitrile and styrene, carboxyl-containing graft monomers were added during graft polymerization. The resulting modified ASA polymer contains carboxyl monomers, which can form active sites. When blended with SAN resin, these sites generate hydrogen bonds or dipole forces, improving the interfacial strength between the modified ASA polymer and SAN resin, and enhancing the mechanical properties of the tank surface. Increasing the acrylonitrile content in the modified ASA resin improves the resin's rigidity and corrosion resistance.

[0024] 3. The hydrophobic filler is a mixture of nano zinc oxide and nano ceramic powder. The nano ceramic powder contains nano silicon dioxide and other substances, which can form a three-dimensional network barrier layer in the resin matrix to capture corrosive media such as chloride ions, thereby improving the corrosion resistance of the surface of the water tank. Detailed Implementation

[0025] The present application will be further described in detail below with reference to Examples 1-5.

[0026] Source of raw materials The raw materials used in the embodiments of this application are as follows: The SAN resin used was SAN resin with an acrylonitrile content of 40%, purchased from Runcheng Import & Export (Tianjin) Co., Ltd., with the brand name Formosa Plastics NF2200AR.

[0027] Example Example 1 This application discloses a corrosion-resistant ASA water tank, comprising a surface layer and a substrate layer. The substrate layer is made of low-density PVC resin to provide rigidity and sufficient impact resistance, ensuring smooth drainage of the water tank. The surface layer comprises the following materials: 10 kg of modified ASA resin; 0.1 kg of silane coupling agent, specifically KH-560 silane coupling agent; 0.5 kg of hydrophobic filler, specifically nano-silica with an average particle size of 30 nm; Antioxidant 0.03kg, specifically a mixture of hindered phenolic antioxidant and antioxidant 168 in a weight ratio of 1.2:1, i.e. 0.017kg hindered phenolic antioxidant and 0.013kg antioxidant 168; 0.06 kg of ultraviolet absorber, specifically benzotriazole ultraviolet absorber; Lubricant 0.02kg, specifically ethylene bis-stearamide.

[0028] Modified ASA resin is prepared by the following steps: Preparation of PBA latex: Under nitrogen protection, 1 kg of deionized water, 15 g of sodium dodecyl sulfate, 3 g of potassium persulfate, 500 g of butyl acrylate and 20 g of dibutyl acrylate were added to a four-necked flask in sequence, stirred evenly and heated to 70 °C, and reacted for 3 h to obtain PBA latex. PBA latex agglomeration: Under nitrogen protection, 60g butyl acrylate, 200g deionized water, and 2g sodium dodecyl sulfate were added to a flask. After pre-emulsification at 70℃ for 30min, 1g ammonium persulfate was added dropwise. Separately, 140g butyl acrylate, 5g hexafluorobutyl acrylate, 10g methacrylic acid, 300g deionized water, and 3g OP-10 were mixed to form a dropping solution. The dropping solution was slowly added dropwise to the above solution over 2h. The reaction was continued for 4h to obtain the agglomerating agent. At room temperature and pressure, the agglomerating agent is added dropwise to PBA latex while stirring continuously. The weight of the agglomerating agent is 13% of the PBA latex, and the addition time is 1 hour. Then the reaction continues for 1 hour to obtain the agglomerated emulsion. Graft polymerization: 10g of tert-butyl peroxide, 5g of tert-dodecyl mercaptan, 220g of styrene, 150g of acrylic acid, and 20g of maleic anhydride were mixed and added dropwise to the agglomeration emulsion. The mixture was heated to 75℃ and kept at that temperature for 0.5h to obtain the modified ASA emulsion. Blending and granulation: The modified ASA emulsion is demulsified, washed, and dried to obtain the modified ASA copolymer. 3 kg of the modified ASA copolymer and 7 kg of SAN resin are mixed evenly and then melt-blended and granulated to obtain the modified ASA resin.

[0029] The specific process for blending and granulation is as follows: Internal mixer blending: Control the temperature of the internal mixer at 180℃ and the rotor speed at 40rpm, add the modified ASA copolymer and SAN resin, blend for 10min and then convey to the main unit of the internal mixer. After the current stabilizes, the material is discharged to the first open mill; open mill mixing: control the temperature of the front roller of the open mill to 180℃, the temperature of the rear roller to 170℃, and the roller gap to 5mm. Pack the blend from the internal mixer 2-3 times to ensure that the modified ASA resin is mixed evenly, and then transport it to the next open mill via a conveyor. Open mill flakes: Control the temperature of the front roller of the open mill to 180℃, the temperature of the rear roller to 170℃, and the roller gap to 10mm. The modified ASA resin is fed into the feed port of the single screw extruder granulator at a uniform speed via a conveyor. Single screw extruder granulation: The temperature of the conveying section of the single screw extruder is controlled at 120~150℃, the temperature of the plasticizing section and the die head is controlled at 160~180℃, and the screw speed is 40~80rpm.

[0030] This application also discloses a method for preparing a corrosion-resistant ASA water tank, comprising the following steps: Preparation of the surface layer: Modified ASA resin, silane coupling agent, hydrophobic filler, antioxidant, ultraviolet absorber and lubricant are put into a high-speed mixer and mixed for 7-10 minutes. The mixture is then conveyed to a granulator, extruded and granulated, then drawn, cooled and pelletized to obtain ASA co-extruded material. Two-layer co-extrusion: ASA co-extrusion material and low-density PVC resin as the main substrate are combined through a co-extrusion mold, and after cooling, vacuum shaping, traction, and cutting, a corrosion-resistant ASA water tank is obtained.

[0031] Example 2 In this embodiment, the surface layer of the corrosion-resistant ASA water tank comprises the following materials: 10 kg of modified ASA resin; 0.22 kg of silane coupling agent, specifically KH-550 silane coupling agent; 0.8 kg of hydrophobic filler, specifically vitrified microspheres with an average particle size of 30 nm; Antioxidant 0.07kg, specifically a mixture of hindered phenolic antioxidant and antioxidant 168 in a weight ratio of 1.6:1, i.e. 0.043kg hindered phenolic antioxidant and 0.027kg antioxidant 168; 0.09 kg of ultraviolet absorber, specifically benzotriazole ultraviolet absorber; Lubricant 0.04kg, specifically ethylene bis-stearamide.

[0032] Modified ASA resin is prepared by the following steps: Preparation of PBA latex: Under nitrogen protection, 1.2 kg of deionized water, 30 g of sodium dodecylbenzenesulfonate, 5 g of sodium persulfate, 600 g of butyl acrylate and 50 g of 1,6-hexanediol diacrylate were added sequentially to a four-necked flask. The mixture was stirred until homogeneous and heated to 80 °C. The reaction was carried out for 4 h to obtain PBA latex. PBA latex agglomeration: Under nitrogen protection, 100g butyl acrylate, 200g deionized water, and 3g sodium polyoxyethylene ether sulfate were added to a flask. After pre-emulsification at 75°C for 40 minutes, 3g tert-butyl peroxide was added dropwise. Separately, 160g butyl acrylate, 20g hexafluorobutyl acrylate, 40g methacrylic acid, 350g deionized water, and 5g OP-10 were mixed to form a dropping solution. The dropping solution was slowly added dropwise to the above solution over a period of 2 hours. The reaction was continued for 5 hours to obtain the agglomerating agent. At room temperature and pressure, the agglomerating agent was added dropwise to PBA latex while stirring continuously. The weight of the agglomerating agent was 20% of the weight of the PBA latex, and the addition time was 1.5 hours. Then the reaction was continued for 1 hour to obtain the agglomerated emulsion. Graft polymerization: 15g of tert-butyl peroxide, 10g of tert-dodecyl mercaptan, 400g of styrene, 280g of acrylic acid and 60g of maleic anhydride were mixed and added dropwise to the agglomeration emulsion. The mixture was heated to 75℃ and kept at that temperature for 0.5h to obtain the modified ASA emulsion. Blending and granulation: The modified ASA emulsion is demulsified, washed, and dried to obtain the modified ASA copolymer. 4.5 kg of the modified ASA copolymer and 5.5 kg of SAN resin are mixed evenly and then melt-blended and granulated to obtain the modified ASA resin.

[0033] Example 3 The surface layer includes the following materials: 10 kg of modified ASA resin; 0.18 kg of silane coupling agent, specifically silane coupling agent KH-560; 0.6 kg of hydrophobic filler, specifically ceramic powder with an average particle size of 50 nm; Antioxidant 0.05kg, specifically a mixture of hindered phenolic antioxidant and antioxidant 168 in a weight ratio of 1.4:1, i.e. 0.029kg hindered phenolic antioxidant and 0.021kg antioxidant 168; 0.07 kg of ultraviolet absorber, specifically benzotriazole ultraviolet absorber; Lubricant 0.03kg, specifically ethylene bis-stearamide.

[0034] Modified ASA resin is prepared by the following steps: Preparation of PBA latex: Under nitrogen protection, 1.1 kg of deionized water, 23 g of sodium dodecyl sulfate, 4 g of potassium persulfate, 530 g of butyl acrylate and 35 g of dibutyl acrylate were added to a four-necked flask in sequence. The mixture was stirred evenly and heated to 75 °C. The reaction was carried out for 3 h to obtain PBA latex. PBA latex agglomeration: Under nitrogen protection, 70g butyl acrylate, 220g deionized water and 2g sodium dodecylbenzenesulfonate were added to a flask. After pre-emulsification at 72℃ for 35min, 2g ammonium persulfate was added dropwise. Separately, 160g butyl acrylate, 14g hexafluorobutyl acrylate, 32g methacrylic acid, 300g deionized water and 4g OP-10 were mixed to form a dropping solution. The dropping solution was slowly added dropwise to the above solution over 2h. The reaction was continued for 4h to obtain the agglomerating agent. At room temperature and pressure, the agglomerating agent is added dropwise to PBA latex while stirring continuously. The weight of the agglomerating agent is 17% of the PBA latex, and the addition time is 1 hour. Then the reaction continues for 1 hour to obtain the agglomerated emulsion. Graft polymerization: 13g of tert-butyl peroxide, 8g of tert-dodecyl mercaptan, 350g of styrene, 210g of acrylic acid, and 38g of acrylic acid were mixed and added dropwise to the agglomeration emulsion. The mixture was heated to 80℃ and kept at that temperature for 1 hour to obtain the modified ASA emulsion. Blending and granulation: The modified ASA emulsion is demulsified, washed, and dried to obtain the modified ASA copolymer. 4 kg of the modified ASA copolymer and 6 kg of SAN resin are mixed evenly and then melt-blended and granulated to obtain the modified ASA resin.

[0035] Example 4 The only difference between this embodiment and Embodiment 1 is that the hydrophobic filler in the surface material is different.

[0036] In this embodiment, the hydrophobic filler is a mixture of nano zinc oxide and nano ceramic powder in a weight ratio of 2:1, namely 0.34 kg of nano zinc oxide and 0.16 kg of nano ceramic powder.

[0037] Example 5 The only difference between this embodiment and Embodiment 1 is that the hydrophobic filler in the surface material is different.

[0038] In this embodiment, the hydrophobic filler is a mixture of nano zinc oxide and nano ceramic powder in a weight ratio of 2.8:1, i.e., 0.36 kg of nano zinc oxide and 0.14 kg of nano ceramic powder.

[0039] Performance testing The corrosion-resistant ASA water tanks prepared in Examples 1-5 were tested for the following properties: 1. Notched impact strength: Tested according to ISO 180 / 1A standard at 23℃.

[0040] 2. Corrosion resistance: The prepared corrosion-resistant ASA water tank was immersed in 10% acetic acid solution and 10% sodium hydroxide solution respectively. After immersion for 24 hours, it was taken out and the changes in the ASA water tank were observed.

[0041] 3. Weather resistance: Aging test was conducted using xenon lamp irradiation according to standard SAE J 2527, with an irradiation energy of 2500 KJ / m². 2 The CIE Lab values ​​before and after the experiment were measured using a spectrophotometer, and ΔE was calculated. The smaller the ΔE, the better the weather resistance.

[0042] Table 1 As shown in Table 1, this application improves the surface of the corrosion-resistant ASA water tank by using modified ASA resin, hydrophobic filler, silane coupling agent, antioxidant, lubricant and ultraviolet absorber to prepare an ASA water tank with excellent corrosion resistance. The water tank has good impact resistance and anti-yellowing properties, which can meet the needs of long-term outdoor use.

[0043] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this specific embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A corrosion resistant ASA sink characterized by: The substrate layer is made of low-density PVC resin, and the surface layer is made of the following raw materials in parts by weight: modified ASA resin 100 parts; silane coupling agent 1-2.2 parts; hydrophobic filler 5-8 parts; antioxidant 0.3-0.7 parts; ultraviolet absorber 0.6-0.9 parts; lubricant 0.2-0.4 parts. The modified ASA resin is prepared by the following steps: Preparation of PBA latex: under the condition of nitrogen protection, deionized water 100-120 parts, 1.5-3 parts of emulsifier, 0.3-0.5 parts of initiator, 50-60 parts of butyl acrylate, 2-5 parts of crosslinking agent are sequentially added into a four-necked flask, stirred uniformly and heated to 70-80℃, and reacted for 3-4h to obtain PBA latex. Preparation of PBA latex: under the condition of nitrogen protection, deionized water 100-120 parts, 1.5-3 parts of emulsifier, 0.3-0.5 parts of initiator, 50-60 parts of butyl acrylate, 2-5 parts of crosslinking agent are sequentially added into a four-necked flask, stirred uniformly and heated to 70-80℃, and reacted for 3-4h to obtain PBA latex. Preparation of PBA latex: under the condition of nitrogen protection, deionized water 100-120 parts, 1.5-3 parts of emulsifier, 0.3-0.5 parts of initiator, 50-60 parts of butyl acrylate, 2-5 parts of crosslinking agent are sequentially added into a four-necked flask, stirred uniformly and heated to 70-80℃, and reacted for 3-4h to obtain PBA latex. Preparation of PBA latex: under the condition of nitrogen protection, deionized water 100-120 parts, 1.5-3 parts of emulsifier, 0.3-0.5 parts of initiator, 50-60 parts of butyl acrylate, 2-5 parts of crosslinking agent are sequentially added into a four-necked flask, stirred uniformly and heated to 70-80℃, and reacted for 3-4h to obtain PBA latex. Preparation of PBA latex: under the condition of nitrogen protection, deionized water 100-120 parts, 1.5-3 parts of emulsifier, 0.3-0.5 parts of initiator, 50-60 parts of butyl acrylate, 2-5 parts of crosslinking agent are sequentially added into a four-necked flask, stirred uniformly and heated to 70-80℃, and reacted for 3-4h to obtain PBA latex. Preparation of PBA latex: under the condition of nitrogen protection, deionized water 100-120 parts, 1.5-3 parts of emulsifier, 0.3-0.5 parts of initiator, 50-60 parts of butyl acrylate, 2-5 parts of crosslinking agent are sequentially added into a four-necked flask, stirred uniformly and heated to 70-80℃, and reacted for 3-4h to obtain PBA latex.

2. The corrosion resistant ASA sink of claim 1, wherein: The hydrophobic filler is selected from one or more of nano-silicon dioxide, vitrified microbeads and nano-ceramic powder.

3. A corrosion resistant ASA sink according to claim 2, wherein: The hydrophobic filler is a mixture of nano-zinc oxide and nano-ceramic powder, and the weight ratio of nano-zinc oxide to nano-ceramic powder is (2-2.8):

1.

4. The corrosion resistant ASA sink of claim 1, wherein: The crosslinking agent is selected from one or more of butylene glycol diacrylate, 1,6-hexanediol diacrylate and ethylene glycol dimethacrylate.

5. The corrosion resistant ASA sink of claim 1, wherein: The carboxyl-containing grafting monomer is selected from one or more of maleic anhydride and acrylic acid.

6. The corrosion resistant ASA sink of claim 1, wherein: The antioxidant is a mixture of hindered phenolic antioxidant and antioxidant 168 in a weight ratio of (1.2-1.6):

1.

7. The corrosion resistant ASA sink of claim 1, wherein: The ultraviolet absorber is a benzotriazole ultraviolet absorber, and the lubricant is ethylene bis-stearamide.

8. The corrosion resistant ASA sink of claim 1, wherein: The emulsifier is selected from two or more of sodium dodecyl benzene sulfonate, sodium dodecyl sulfate, OP-10 and sodium polyoxyethylene ether sulfate, and the initiator is selected from one or more of sodium persulfate, tert-butyl peroxybenzoate, potassium persulfate and an oxidation-reduction initiator.

9. A method of making a corrosion resistant ASA sink according to any one of claims 1-8, characterized in that, The method comprises the following steps: The modified ASA resin, the silane coupling agent, the hydrophobic filler, the antioxidant, the ultraviolet absorber and the lubricant are mixed in a high-speed mixer for 7-10 min, the mixture is conveyed to a granulator, is extrusion granulated, is then pulled, is cooled and is cut to obtain ASA co-extrusion material; The ASA co-extrusion material and the main base material low-density PVC resin are combined through a co-extrusion die, are cooled, are vacuum shaped, are pulled, are cut and are then obtained as corrosion-resistant ASA sinks.

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