Corrosion-resistant ABS plastic and preparation method thereof

Abstract

The invention discloses a corrosion-resistant ABS plastic and a preparation method thereof, and relates to the technical field of ABS preparation, the corrosion-resistant ABS plastic comprises the following raw materials by weight: 80-100 parts of modified ABS, 5-8 parts of modified graphene and 0.02-0.05 part of a Karst catalyst, in the melt extrusion process of the modified ABS, the modified graphene and the Karst catalyst, the modified ABS, the modified graphene and the Karst catalyst are subjected to melt extrusion to obtain the corrosion-resistant ABS plastic. Si-H bonds on the modified ABS and double bonds on the modified graphene are grafted to further form more crosslinking points, so that a more compact three-dimensional network structure is formed between a modified ABS molecular chain and the modified graphene, a two-dimensional lamellar structure of the modified graphene can form a uniform covering layer in a modified ABS matrix, and a fluorine-containing polysiloxane chain segment is embedded in a molecular network, so that the fluorine-containing polysiloxane-modified ABS composite material has the advantages that the fluorine-containing polysiloxane-modified ABS composite material is more excellent in heat resistance and heat resistance, and the service life of the fluorine-containing polysiloxane-modified ABS composite material is prolonged. The surface tension of the material surface is obviously reduced, the contact between a corrosive medium and the material surface is reduced, and the corrosion resistance of the material is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ABS plastic preparation, and in particular to corrosion-resistant ABS plastic and a preparation method thereof. Background Art

[0002] ABS resin is a thermoplastic engineering plastic formed by copolymerizing acrylonitrile, butadiene, and styrene. Due to its excellent overall performance, including good impact resistance, heat resistance, low-temperature resistance, and electrical properties, ABS resin is widely used in a variety of fields, including automobiles, electronics, construction, and medical equipment. However, as the application environment becomes more complex, the corrosion resistance of ABS resin in certain harsh conditions, such as strong acids, strong bases, or high temperatures, has become a key issue hindering its further development. Summary of the Invention

[0003] The purpose of the present invention is to provide a corrosion-resistant ABS plastic and a preparation method thereof, which solves the problem that the corrosion resistance of ABS plastic at present is generally poor.

[0004] The purpose of the present invention can be achieved through the following technical solutions: A method for preparing corrosion-resistant ABS plastic specifically comprises the following steps: Step A1: butadiene, rosin acid soap, tert-dodecyl mercaptan, and deionized water are uniformly mixed, nitrogen is introduced, and potassium persulfate is added while stirring at a speed of 120-150 r / min and a temperature of 50-55° C. The temperature is raised to 70-75° C. and the reaction is carried out for 1-1.5 hours to obtain polybutadiene latex; Step A2: polybutadiene latex, deionized water, disodium ethylenediaminetetraacetic acid, sodium formaldehyde sulfoxylate, and ferrous sulfate are uniformly mixed, and styrene, acrylonitrile, tert-dodecyl mercaptan, and cumene hydroperoxide are added with stirring at a speed of 120-150 r / min and a temperature of 55-60° C. The mixture is reacted for 1-2 hours, and then a modifying monomer, methyl methacrylate, and potassium persulfate are added. The mixture is heated to 70-75° C. and reacted for 1-1.5 hours to obtain modified ABS. Step A3: dispersing graphene oxide in ethanol, stirring at a speed of 200-300 r / min and a temperature of 70-75° C., adding deionized water and 3-(methacryloyloxy)propyltrimethoxysilane, and reacting for 3-5 hours to obtain modified graphene; Step A4: Weigh the following raw materials in parts by weight: 80-100 parts of modified ABS, 5-8 parts of modified graphene, and 0.02-0.05 parts of Custer catalyst, add the raw materials to a twin-screw extruder, and extrude, cool, dry, and injection mold the products under the conditions of a zone 1 temperature of 195°C, a zone 2 temperature of 200°C, a zone 3 temperature of 210°C, a zone 4 temperature of 215°C, and a die head temperature of 220°C to obtain corrosion-resistant ABS plastic.

[0005] Furthermore, the mass ratio of butadiene, rosin acid soap, tert-dodecyl mercaptan, deionized water and potassium persulfate described in step A1 is 100:4:0.2:0.5:150.

[0006] Furthermore, the mass ratio of the polybutadiene latex, deionized water, disodium ethylenediaminetetraacetic acid, sodium formaldehyde sulfoxylate, ferrous sulfate, styrene, acrylonitrile, tert-dodecyl mercaptan, cumene hydroperoxide, modified monomer, methyl methacrylate and potassium persulfate described in step A2 is 650:600:0.3:0.2:0.02:89:31:0.66:0.23:10:20:0.24.

[0007] Furthermore, the amount of 3-(methacryloyloxy)propyltrimethoxysilane used in step A3 is 1% of the mass of graphene oxide.

[0008] Furthermore, the modified monomer is prepared by the following steps: Step B1: 4,4'-dihydroxybiphenyl and concentrated sulfuric acid are mixed uniformly, stirred at a speed of 120-150 r / min and a temperature of 0°C, and fuming nitric acid is added. The temperature is raised to 20-25°C, and the reaction is carried out for 3-5 hours to obtain intermediate 1. Intermediate 1, triethylamine, and DMF are mixed uniformly, stirred at a speed of 150-200 r / min and a temperature of 40-50°C, and acryloyl chloride is added. The reaction is carried out for 4-6 hours to obtain intermediate 2. Step B2: Intermediate 2, trichlorosilane, chloroplatinic acid and DMF are mixed, nitrogen protection is introduced, and the reaction is carried out at a speed of 200-300 r / min and a temperature of 80-85°C for 6-8 hours to obtain a modifier. Dimethylhydrogen silicon alkoxide lithium and DMF are mixed, and trifluoropropylmethylcyclotrisiloxane is added at a speed of 150-200 r / min and a temperature of 0°C. The mixture is heated to 25-30°C and reacted for 20-24 hours. The modifier is then added and the reaction is continued for 1-1.5 hours to obtain a modified polysiloxane. Step B3: The modified polysiloxane, zinc powder, deionized water and DMF are mixed uniformly, stirred at a speed of 60-80 r / min and a temperature of 90-95°C, and concentrated hydrochloric acid is added to react for 3-4 hours to obtain amino polysiloxane. Maleic anhydride and DMF are mixed, stirred at a speed of 200-300 r / min and a temperature of 5-10°C, and amino polysiloxane is added. The temperature is raised to 55-60°C, and the reaction is carried out for 30-40 minutes. Triethylamine, acetic anhydride and nickel acetate are added, and the reaction is continued for 2-3 hours to obtain a modified monomer.

[0009] Furthermore, the usage ratio of 4,4'-dihydroxybiphenyl, concentrated sulfuric acid and fuming nitric acid in step B1 is 40mmol:50mL:85mmol, the mass fraction of concentrated sulfuric acid is 98%, the mass fraction of fuming nitric acid is 90%, and the molar ratio of intermediate 1, triethylamine and acryloyl chloride is 1:2.1:2.

[0010] Furthermore, the molar ratio of the intermediate 2 and trichlorosilane described in step B2 is 1:2, the amount of chloroplatinic acid used is 1‰ of the mass of trichlorosilane, and the molar ratio of lithium dimethylhydrogen siliconate, trifluoropropylmethylcyclotrisiloxane and Si-Cl on the modifier is 1:4:1.

[0011] Furthermore, the amount ratio of the modified polysiloxane, zinc powder, deionized water, DMF and concentrated hydrochloric acid described in step B3 is 15g:16g:50mL:200mL:55mL, the mass fraction of concentrated hydrochloric acid is 36%, and the amount of maleic anhydride, amino group on amino polysiloxane, triethylamine, acetic anhydride and nickel acetate is 56mmol:28mmol:5mL:12mL:3.5g.

[0012] The beneficial effects of the present invention are as follows: the corrosion-resistant ABS plastic disclosed in the present invention comprises the following raw materials: modified ABS, modified graphene and a Custer catalyst; the modified graphene is prepared by treating graphene oxide with 3-(methacryloyloxy)propyltrimethoxysilane so that double bonds are grafted onto the surface of the graphene oxide; the modified ABS is prepared by free radical emulsion polymerization with butadiene as the raw material to prepare polybutadiene latex; the polybutadiene latex, styrene, acrylonitrile, a modified monomer and methyl methacrylate are grafted onto the modified ABS.

[0013] The modified monomer uses 4,4'-dihydroxybiphenyl as a raw material, and uses concentrated sulfuric acid and fuming nitric acid to graft a nitro group at the ortho-position of the hydroxyl group to obtain an intermediate 1. The intermediate 1 is reacted with acryloyl chloride, so that the hydroxyl group on the intermediate 1 reacts with the acyl chloride on the acryloyl chloride to obtain an intermediate 2. The intermediate 2 is reacted with trichlorosilane, so that the double bond on the intermediate 2 reacts with the Si-H bond on the trichlorosilane to obtain a modifier. Dimethyl hydrogen silicon alcohol lithium is used as an initiator, trifluoropropylmethylcyclotrisiloxane is used as a polymerization monomer, and then the modifier is added, so that the Si-Cl bond on the modifier reacts with the silicon alcohol lithium to obtain a modified polysiloxane. The modified polysiloxane is reduced with zinc powder, so that the nitro group on the modified polysiloxane is converted into an amino group to obtain an amino polysiloxane. The amino polysiloxane is reacted with maleic anhydride to form maleimide to obtain a modified monomer.

[0014] During the melt extrusion process of modified ABS, modified graphene and Caster catalyst, the Si-H bonds on the modified ABS and the double bonds on the modified graphene are grafted to form more cross-linking points, thereby forming a denser three-dimensional network structure between the modified ABS molecular chains and the modified graphene. This structure can effectively prevent the penetration of corrosive media. The two-dimensional layer structure of the modified graphene can form a uniform covering layer in the modified ABS matrix, and the fluorinated polysiloxane segments embedded in the molecular network significantly reduce the surface tension of the material surface, thereby reducing the contact between the corrosive medium and the material surface, and further improving the corrosion resistance of the material. DETAILED DESCRIPTION

[0015] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0016] Example 1, a method for preparing corrosion-resistant ABS plastic, specifically comprising the following steps: Step A1: Butadiene, rosin acid soap, tert-dodecyl mercaptan, and deionized water were uniformly mixed, nitrogen was introduced, and potassium persulfate was added at a speed of 120 r / min and a temperature of 50° C. The temperature was raised to 70° C. and the reaction was carried out for 1 hour to prepare polybutadiene latex; Step A2: polybutadiene latex, deionized water, disodium ethylenediaminetetraacetic acid, sodium formaldehyde sulfoxylate, and ferrous sulfate were uniformly mixed, and styrene, acrylonitrile, tert-dodecyl mercaptan, and cumene hydroperoxide were added with stirring at a speed of 120 r / min and a temperature of 55° C. The mixture was reacted for 1 hour, and then a modifying monomer, methyl methacrylate, and potassium persulfate were added. The temperature was raised to 70° C. and the reaction was continued for 1 hour to obtain modified ABS. Step A3: Graphene oxide was dispersed in ethanol, and deionized water and 3-(methacryloyloxy)propyltrimethoxysilane were added under stirring at a speed of 200 r / min and a temperature of 70° C., and the mixture was reacted for 3 h to obtain modified graphene; Step A4: Weigh the following raw materials in parts by weight: 80 parts of modified ABS, 5 parts of modified graphene, and 0.02 parts of Custer catalyst, add the raw materials to a twin-screw extruder, and extrude, cool, dry, and injection mold the products under the conditions of a zone 1 temperature of 195°C, a zone 2 temperature of 200°C, a zone 3 temperature of 210°C, a zone 4 temperature of 215°C, and a die head temperature of 220°C to obtain corrosion-resistant ABS plastic.

[0017] The mass ratio of butadiene, rosin acid soap, tert-dodecyl mercaptan, deionized water and potassium persulfate described in step A1 is 100:4:0.2:0.5:150.

[0018] The mass ratio of the polybutadiene latex, deionized water, disodium ethylenediaminetetraacetate, sodium formaldehyde sulfoxylate, ferrous sulfate, styrene, acrylonitrile, tert-dodecyl mercaptan, cumene hydroperoxide, modifying monomer, methyl methacrylate, and potassium persulfate described in step A2 is 650:600:0.3:0.2:0.02:89:31:0.66:0.23:10:20:0.24.

[0019] The amount of 3-(methacryloyloxy)propyltrimethoxysilane used in step A3 is 1% of the mass of graphene oxide.

[0020] The modified monomer is prepared by the following steps: Step B1: 4,4'-dihydroxybiphenyl and concentrated sulfuric acid were mixed uniformly, stirred at a speed of 120 r / min and a temperature of 0°C, and fuming nitric acid was added. The temperature was raised to 20°C, and the reaction was carried out for 3 hours to obtain intermediate 1. Intermediate 1, triethylamine, and DMF were mixed uniformly, stirred at a speed of 150 r / min and a temperature of 40°C, and acryloyl chloride was added. The reaction was carried out for 4 hours to obtain intermediate 2. Step B2: Intermediate 2, trichlorosilane, chloroplatinic acid and DMF were mixed, nitrogen was introduced, and the reaction was carried out at a speed of 200 r / min and a temperature of 80°C for 6 hours to obtain a modifier. Dimethylhydrogen silicon alkoxide lithium and DMF were mixed, and trifluoropropylmethylcyclotrisiloxane was added while stirring at a speed of 150 r / min and a temperature of 0°C. The mixture was heated to 25°C and reacted for 20 hours. The modifier was then added and the reaction was continued for 1 hour to obtain a modified polysiloxane. Step B3: The modified polysiloxane, zinc powder, deionized water and DMF were mixed uniformly, stirred at a speed of 60 r / min and a temperature of 90°C, and concentrated hydrochloric acid was added to react for 3 hours to obtain amino polysiloxane. Maleic anhydride and DMF were mixed, stirred at a speed of 200 r / min and a temperature of 5°C, and amino polysiloxane was added. The temperature was raised to 55°C, and the reaction was carried out for 30 minutes. Triethylamine, acetic anhydride and nickel acetate were added, and the reaction was continued for 2 hours to obtain a modified monomer.

[0021] The amount ratio of 4,4'-dihydroxybiphenyl, concentrated sulfuric acid and fuming nitric acid described in step B1 is 40mmol:50mL:85mmol, the mass fraction of concentrated sulfuric acid is 98%, the mass fraction of fuming nitric acid is 90%, and the molar ratio of intermediate 1, triethylamine and acryloyl chloride is 1:2.1:2.

[0022] The molar ratio of intermediate 2 and trichlorosilane described in step B2 is 1:2, the amount of chloroplatinic acid used is 1‰ of the mass of trichlorosilane, and the molar ratio of lithium dimethylhydrogen siliconate, trifluoropropylmethylcyclotrisiloxane and Si-Cl on the modifier is 1:4:1.

[0023] The amount ratio of the modified polysiloxane, zinc powder, deionized water, DMF and concentrated hydrochloric acid described in step B3 is 15g:16g:50mL:200mL:55mL, the mass fraction of concentrated hydrochloric acid is 36%, and the amount of maleic anhydride, amino group on the amino polysiloxane, triethylamine, acetic anhydride and nickel acetate is 56mmol:28mmol:5mL:12mL:3.5g.

[0024] Example 2, a method for preparing corrosion-resistant ABS plastic, specifically comprising the following steps: Step A1: Butadiene, rosin acid soap, tert-dodecyl mercaptan, and deionized water were uniformly mixed, nitrogen was introduced, and potassium persulfate was added at a speed of 120 r / min and a temperature of 55° C. The temperature was raised to 70° C. and the reaction was carried out for 1.3 hours to obtain polybutadiene latex; Step A2: polybutadiene latex, deionized water, disodium ethylenediaminetetraacetic acid, sodium formaldehyde sulfoxylate, and ferrous sulfate were uniformly mixed, and styrene, acrylonitrile, tert-dodecyl mercaptan, and cumene hydroperoxide were added with stirring at a speed of 120 r / min and a temperature of 60° C. The mixture was reacted for 1.5 hours, and then the modifying monomer, methyl methacrylate, and potassium persulfate were added. The temperature was raised to 70° C. and the reaction was continued for 1.5 hours to obtain modified ABS. Step A3: Graphene oxide was dispersed in ethanol, and deionized water and 3-(methacryloyloxy)propyltrimethoxysilane were added under stirring at a speed of 200 r / min and a temperature of 75° C., and the mixture was reacted for 4 h to obtain modified graphene; Step A4: Weigh the following raw materials in parts by weight: 90 parts of modified ABS, 6.5 parts of modified graphene, and 0.03 parts of Custer catalyst, add the raw materials to a twin-screw extruder, and extrude, cool, dry, and injection mold the products under the conditions of a zone 1 temperature of 195°C, a zone 2 temperature of 200°C, a zone 3 temperature of 210°C, a zone 4 temperature of 215°C, and a die head temperature of 220°C to obtain corrosion-resistant ABS plastic.

[0025] The mass ratio of butadiene, rosin acid soap, tert-dodecyl mercaptan, deionized water and potassium persulfate described in step A1 is 100:4:0.2:0.5:150.

[0026] The mass ratio of the polybutadiene latex, deionized water, disodium ethylenediaminetetraacetate, sodium formaldehyde sulfoxylate, ferrous sulfate, styrene, acrylonitrile, tert-dodecyl mercaptan, cumene hydroperoxide, modifying monomer, methyl methacrylate, and potassium persulfate described in step A2 is 650:600:0.3:0.2:0.02:89:31:0.66:0.23:10:20:0.24.

[0027] The amount of 3-(methacryloyloxy)propyltrimethoxysilane used in step A3 is 1% of the mass of graphene oxide.

[0028] The modified monomer is prepared by the following steps: Step B1: 4,4'-dihydroxybiphenyl and concentrated sulfuric acid were mixed uniformly, stirred at a speed of 120 r / min and a temperature of 0°C, and fuming nitric acid was added. The temperature was raised to 25°C, and the reaction was carried out for 4 hours to obtain intermediate 1. Intermediate 1, triethylamine, and DMF were mixed uniformly, stirred at a speed of 150 r / min and a temperature of 45°C, and acryloyl chloride was added. The reaction was carried out for 5 hours to obtain intermediate 2. Step B2: Intermediate 2, trichlorosilane, chloroplatinic acid and DMF were mixed, nitrogen was introduced, and the reaction was carried out at a speed of 200 r / min and a temperature of 85°C for 7 hours to obtain a modifier. Dimethylhydrogen silicon alkoxide lithium and DMF were mixed, and trifluoropropylmethylcyclotrisiloxane was added while stirring at a speed of 150 r / min and a temperature of 0°C. The mixture was heated to 30°C and reacted for 22 hours. After that, the modifier was added and the reaction was continued for 1.3 hours to obtain a modified polysiloxane. Step B3: The modified polysiloxane, zinc powder, deionized water and DMF were mixed uniformly, stirred at a speed of 60 r / min and a temperature of 95°C, and concentrated hydrochloric acid was added to react for 3.5 hours to obtain amino polysiloxane. Maleic anhydride and DMF were mixed, stirred at a speed of 200 r / min and a temperature of 8°C, and amino polysiloxane was added. The temperature was raised to 58°C, and the reaction was carried out for 35 minutes. Triethylamine, acetic anhydride and nickel acetate were added, and the reaction was continued for 3 hours to obtain a modified monomer.

[0029] The amount ratio of 4,4'-dihydroxybiphenyl, concentrated sulfuric acid and fuming nitric acid described in step B1 is 40mmol:50mL:85mmol, the mass fraction of concentrated sulfuric acid is 98%, the mass fraction of fuming nitric acid is 90%, and the molar ratio of intermediate 1, triethylamine and acryloyl chloride is 1:2.1:2.

[0030] The molar ratio of intermediate 2 and trichlorosilane described in step B2 is 1:2, the amount of chloroplatinic acid used is 1‰ of the mass of trichlorosilane, and the molar ratio of lithium dimethylhydrogen siliconate, trifluoropropylmethylcyclotrisiloxane and Si-Cl on the modifier is 1:4:1.

[0031] The amount ratio of the modified polysiloxane, zinc powder, deionized water, DMF and concentrated hydrochloric acid described in step B3 is 15g:16g:50mL:200mL:55mL, the mass fraction of concentrated hydrochloric acid is 36%, and the amount of maleic anhydride, amino group on the amino polysiloxane, triethylamine, acetic anhydride and nickel acetate is 56mmol:28mmol:5mL:12mL:3.5g.

[0032] Example 3, a method for preparing corrosion-resistant ABS plastic, specifically comprising the following steps: Step A1: Butadiene, rosin acid soap, tert-dodecyl mercaptan, and deionized water were uniformly mixed, nitrogen was introduced, and potassium persulfate was added at a speed of 150 r / min and a temperature of 55° C. The temperature was raised to 75° C. and the reaction was carried out for 1.5 hours to obtain polybutadiene latex; Step A2: polybutadiene latex, deionized water, disodium ethylenediaminetetraacetic acid, sodium formaldehyde sulfoxylate, and ferrous sulfate were uniformly mixed, and styrene, acrylonitrile, tert-dodecyl mercaptan, and cumene hydroperoxide were added with stirring at a speed of 150 r / min and a temperature of 60° C. The mixture was reacted for 2 hours, and then the modifying monomer, methyl methacrylate, and potassium persulfate were added. The temperature was raised to 75° C. and the reaction was carried out for 1.5 hours to obtain modified ABS. Step A3: Graphene oxide was dispersed in ethanol, and deionized water and 3-(methacryloyloxy)propyltrimethoxysilane were added under stirring at a speed of 300 r / min and a temperature of 75° C., and the mixture was reacted for 5 h to obtain modified graphene; Step A4: Weigh the following raw materials in parts by weight: 100 parts of modified ABS, 8 parts of modified graphene, and 0.05 parts of Custer catalyst, add the raw materials to a twin-screw extruder, and extrude, cool, dry, and injection mold the products under the conditions of a zone 1 temperature of 195°C, a zone 2 temperature of 200°C, a zone 3 temperature of 210°C, a zone 4 temperature of 215°C, and a die head temperature of 220°C to obtain corrosion-resistant ABS plastic.

[0033] The mass ratio of butadiene, rosin acid soap, tert-dodecyl mercaptan, deionized water and potassium persulfate described in step A1 is 100:4:0.2:0.5:150.

[0034] The mass ratio of the polybutadiene latex, deionized water, disodium ethylenediaminetetraacetate, sodium formaldehyde sulfoxylate, ferrous sulfate, styrene, acrylonitrile, tert-dodecyl mercaptan, cumene hydroperoxide, modifying monomer, methyl methacrylate, and potassium persulfate described in step A2 is 650:600:0.3:0.2:0.02:89:31:0.66:0.23:10:20:0.24.

[0035] The amount of 3-(methacryloyloxy)propyltrimethoxysilane used in step A3 is 1% of the mass of graphene oxide.

[0036] The modified monomer is prepared by the following steps: Step B1: 4,4'-dihydroxybiphenyl and concentrated sulfuric acid were mixed uniformly, stirred at a speed of 150 r / min and a temperature of 0°C, and fuming nitric acid was added. The temperature was raised to 25°C, and the reaction was carried out for 5 hours to obtain intermediate 1. Intermediate 1, triethylamine, and DMF were mixed uniformly, stirred at a speed of 200 r / min and a temperature of 50°C, and acryloyl chloride was added. The reaction was carried out for 6 hours to obtain intermediate 2. Step B2: Intermediate 2, trichlorosilane, chloroplatinic acid and DMF were mixed, nitrogen was introduced, and the reaction was carried out at a speed of 300 r / min and a temperature of 85°C for 8 hours to obtain a modifier. Dimethylhydrogen silicon alkoxide lithium and DMF were mixed, and trifluoropropylmethylcyclotrisiloxane was added at a speed of 200 r / min and a temperature of 0°C. The mixture was heated to 30°C and reacted for 24 hours. The modifier was then added and the reaction was continued for 1.5 hours to obtain a modified polysiloxane. Step B3: The modified polysiloxane, zinc powder, deionized water and DMF were mixed uniformly, stirred at a speed of 80 r / min and a temperature of 95°C, and concentrated hydrochloric acid was added to react for 4 hours to obtain amino polysiloxane. Maleic anhydride and DMF were mixed, stirred at a speed of 300 r / min and a temperature of 10°C, and amino polysiloxane was added. The temperature was raised to 60°C, and the reaction was carried out for 40 minutes. Triethylamine, acetic anhydride and nickel acetate were added, and the reaction was continued for 3 hours to obtain a modified monomer.

[0037] The amount ratio of 4,4'-dihydroxybiphenyl, concentrated sulfuric acid and fuming nitric acid described in step B1 is 40mmol:50mL:85mmol, the mass fraction of concentrated sulfuric acid is 98%, the mass fraction of fuming nitric acid is 90%, and the molar ratio of intermediate 1, triethylamine and acryloyl chloride is 1:2.1:2.

[0038] The molar ratio of intermediate 2 and trichlorosilane described in step B2 is 1:2, the amount of chloroplatinic acid used is 1‰ of the mass of trichlorosilane, and the molar ratio of lithium dimethylhydrogen siliconate, trifluoropropylmethylcyclotrisiloxane and Si-Cl on the modifier is 1:4:1.

[0039] The amount ratio of the modified polysiloxane, zinc powder, deionized water, DMF and concentrated hydrochloric acid described in step B3 is 15g:16g:50mL:200mL:55mL, the mass fraction of concentrated hydrochloric acid is 36%, and the amount of maleic anhydride, amino group on the amino polysiloxane, triethylamine, acetic anhydride and nickel acetate is 56mmol:28mmol:5mL:12mL:3.5g.

[0040] Comparative Example 1: Compared with Example 1, this comparative example uses graphene oxide instead of modified graphene, and the remaining steps are the same.

[0041] Comparative Example 2: This comparative example is similar to Example 1, in which trifluoropropylmethylcyclotrisiloxane is replaced with trimethylcyclotrisiloxane, and the remaining steps are the same. Comparative Example 3: Compared with Example 1, modified polysiloxane is used instead of the modified monomer, and the remaining steps are the same.

[0042] The ABS materials prepared in Examples 1-3 and Comparative Examples 1-3 were immersed in a 98% by mass sulfuric acid solution and a 40% by mass sodium hydroxide solution, respectively, for one week in accordance with the standard of GB / T11547-2008. The test results are shown in Table 1 below.

[0043] Table 1

[0044] It can be seen from Table 1 that the ABS material prepared in this application has a very good corrosion resistance.

[0045] The above content is merely an example and explanation of the concept of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

Claims

1. A method for preparing corrosion-resistant ABS plastic, characterized in that: The specific steps include: Step A1: butadiene, rosin acid soap, tert-dodecyl mercaptan and deionized water are uniformly mixed, nitrogen is introduced into the mixture for protection, potassium persulfate is added and stirred, and the mixture is reacted to obtain polybutadiene latex; Step A2: polybutadiene latex, deionized water, disodium ethylenediaminetetraacetate, sodium formaldehyde sulfoxylate, and ferrous sulfate are mixed and stirred, and styrene, acrylonitrile, tert-dodecyl mercaptan, and cumene hydroperoxide are added and reacted, and then a modifying monomer, methyl methacrylate, and potassium persulfate are added and the reaction is continued to obtain modified ABS; Step A3: dispersing graphene oxide in ethanol, stirring, and adding deionized water and 3-(methacryloyloxy)propyltrimethoxysilane to react to obtain modified graphene; Step A4: Weigh the following raw materials in parts by weight: 80-100 parts of modified ABS, 5-8 parts of modified graphene, and 0.02-0.05 parts of Custer catalyst, add the raw materials into a twin-screw extruder, extrude, cool, dry, and injection mold to produce corrosion-resistant ABS plastic.

2. The method for preparing corrosion-resistant ABS plastic according to claim 1, characterized in that: The mass ratio of butadiene, rosin acid soap, tert-dodecyl mercaptan, deionized water and potassium persulfate described in step A1 is 100:4:0.2:0.5:

150.

3. The method for preparing corrosion-resistant ABS plastic according to claim 1, characterized in that: The mass ratio of the polybutadiene latex, deionized water, disodium ethylenediaminetetraacetate, sodium formaldehyde sulfoxylate, ferrous sulfate, styrene, acrylonitrile, tert-dodecyl mercaptan, cumene hydroperoxide, modifying monomer, methyl methacrylate, and potassium persulfate described in step A2 is 650:600:0.3:0.2:0.02:89:31:0.66:0.23:10:20:0.

24.

4. The method for preparing corrosion-resistant ABS plastic according to claim 1, characterized in that: The amount of 3-(methacryloyloxy)propyltrimethoxysilane used in step A3 is 1% of the mass of graphene oxide.

5. The method for preparing corrosion-resistant ABS plastic according to claim 1, characterized in that: The modified monomer is prepared by the following steps: Step B1: 4,4'-dihydroxybiphenyl and concentrated sulfuric acid were mixed and stirred, and fuming nitric acid was added, and the temperature was raised to react to obtain intermediate 1. Intermediate 1, triethylamine, and DMF were mixed and stirred, and acryloyl chloride was added to react to obtain intermediate 2; Step B2: Intermediate 2, trichlorosilane, chloroplatinic acid, and DMF are mixed and reacted under nitrogen protection to obtain a modifier. Dimethylhydrogensilanol lithium and DMF are mixed and stirred, and trifluoropropylmethylcyclotrisiloxane is added. After heating to react, the modifier is added and the reaction is continued to obtain a modified polysiloxane. Step B3: The modified polysiloxane, zinc powder, deionized water and DMF are mixed and stirred, and concentrated hydrochloric acid is added to react to obtain amino polysiloxane. Maleic anhydride and DMF are mixed and stirred, and the amino polysiloxane is added. The temperature is increased to react, and triethylamine, acetic anhydride and nickel acetate are added. The reaction is continued to obtain a modified monomer.

6. The method for preparing corrosion-resistant ABS plastic according to claim 5, characterized in that: The amount ratio of 4,4'-dihydroxybiphenyl, concentrated sulfuric acid and fuming nitric acid in step B1 is 40mmol:50mL:85mmol, and the molar ratio of intermediate 1, triethylamine and acryloyl chloride is 1:2.1:

2.

7. The method for preparing corrosion-resistant ABS plastic according to claim 5, characterized in that: The molar ratio of the intermediate 2 and trichlorosilane in step B2 is 1:2, and the molar ratio of lithium dimethylhydrogensilanol, trifluoropropylmethylcyclotrisiloxane and Si-Cl on the modifier is 1:4:

1.

8. The method for preparing corrosion-resistant ABS plastic according to claim 5, characterized in that: The amount ratio of the modified polysiloxane, zinc powder, deionized water, DMF and concentrated hydrochloric acid described in step B3 is 15g:16g:50mL:200mL:55mL, and the amount of maleic anhydride, amino group on the amino polysiloxane, triethylamine, acetic anhydride and nickel acetate is 56mmol:28mmol:5mL:12mL:3.5g.

9. A corrosion-resistant ABS plastic, characterized by: Prepared according to any one of claims 1 to 8.

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