CN117304411B - Preparation method of ASA high-glue powder - Google Patents
Preparation method of ASA high-glue powder Download PDFInfo
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- CN117304411B CN117304411B CN202311606130.5A CN202311606130A CN117304411B CN 117304411 B CN117304411 B CN 117304411B CN 202311606130 A CN202311606130 A CN 202311606130A CN 117304411 B CN117304411 B CN 117304411B
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- 239000000843 powder Substances 0.000 title claims abstract description 77
- 238000002360 preparation method Methods 0.000 title claims abstract description 34
- 239000003292 glue Substances 0.000 title claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 100
- 229920001971 elastomer Polymers 0.000 claims abstract description 68
- 229920000058 polyacrylate Polymers 0.000 claims abstract description 68
- 239000005060 rubber Substances 0.000 claims abstract description 68
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 60
- 229920000126 latex Polymers 0.000 claims abstract description 56
- 239000004816 latex Substances 0.000 claims abstract description 55
- 238000003756 stirring Methods 0.000 claims abstract description 55
- 239000004005 microsphere Substances 0.000 claims abstract description 54
- 239000000839 emulsion Substances 0.000 claims abstract description 52
- 239000002131 composite material Substances 0.000 claims abstract description 46
- 239000008367 deionised water Substances 0.000 claims abstract description 36
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 22
- GJKGAPPUXSSCFI-UHFFFAOYSA-N 2-Hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone Chemical compound CC(C)(O)C(=O)C1=CC=C(OCCO)C=C1 GJKGAPPUXSSCFI-UHFFFAOYSA-N 0.000 claims abstract description 20
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims abstract description 19
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims abstract description 17
- FBCQUCJYYPMKRO-UHFFFAOYSA-N prop-2-enyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCC=C FBCQUCJYYPMKRO-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000007599 discharging Methods 0.000 claims abstract description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims abstract description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 42
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 34
- 239000000178 monomer Substances 0.000 claims description 26
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 21
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 20
- 238000010008 shearing Methods 0.000 claims description 19
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 16
- -1 allyloxy nonylphenoxy propanol Chemical compound 0.000 claims description 15
- 125000005396 acrylic acid ester group Chemical group 0.000 claims description 13
- 239000007864 aqueous solution Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 10
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 7
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 7
- 235000010489 acacia gum Nutrition 0.000 claims description 7
- 239000001785 acacia senegal l. willd gum Substances 0.000 claims description 7
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 7
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 claims description 7
- FSAJWMJJORKPKS-UHFFFAOYSA-N octadecyl prop-2-enoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)C=C FSAJWMJJORKPKS-UHFFFAOYSA-N 0.000 claims description 7
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 7
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 7
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 7
- ISXSCDLOGDJUNJ-UHFFFAOYSA-N tert-butyl prop-2-enoate Chemical compound CC(C)(C)OC(=O)C=C ISXSCDLOGDJUNJ-UHFFFAOYSA-N 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 5
- FJSPGHNSBJVXEH-UHFFFAOYSA-N C(C=C)(=O)NOS(=O)(=O)C(C)C.[Na] Chemical compound C(C=C)(=O)NOS(=O)(=O)C(C)C.[Na] FJSPGHNSBJVXEH-UHFFFAOYSA-N 0.000 claims description 4
- JDXQSTLUHNAVMN-UHFFFAOYSA-M sodium propane-2-sulfonate prop-2-enamide Chemical compound [Na+].NC(=O)C=C.CC(C)S([O-])(=O)=O JDXQSTLUHNAVMN-UHFFFAOYSA-M 0.000 claims description 4
- 238000009833 condensation Methods 0.000 claims description 2
- 230000005494 condensation Effects 0.000 claims description 2
- 230000018044 dehydration Effects 0.000 claims description 2
- 238000006297 dehydration reaction Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 24
- 238000004040 coloring Methods 0.000 abstract description 10
- 238000009826 distribution Methods 0.000 abstract description 8
- 238000012360 testing method Methods 0.000 description 10
- 239000011347 resin Substances 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 238000005452 bending Methods 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 4
- 238000010559 graft polymerization reaction Methods 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 230000036632 reaction speed Effects 0.000 description 3
- 229910052724 xenon Inorganic materials 0.000 description 3
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 3
- PQHKBJOUOHLCCV-UHFFFAOYSA-N CC1(C=CC=CC1C(=O)C2=CC=C(C=C2)OCCO)O Chemical compound CC1(C=CC=CC1C(=O)C2=CC=C(C=C2)OCCO)O PQHKBJOUOHLCCV-UHFFFAOYSA-N 0.000 description 2
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 2
- 229920000800 acrylic rubber Polymers 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000001804 emulsifying effect Effects 0.000 description 2
- 238000010556 emulsion polymerization method Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000012966 redox initiator Substances 0.000 description 2
- 241000220479 Acacia Species 0.000 description 1
- JUEDJIRGERJMGO-UHFFFAOYSA-N C(C)(C)[Na].C(C=C)(=O)N Chemical compound C(C)(C)[Na].C(C=C)(=O)N JUEDJIRGERJMGO-UHFFFAOYSA-N 0.000 description 1
- 239000004609 Impact Modifier Substances 0.000 description 1
- 235000010643 Leucaena leucocephala Nutrition 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000012662 bulk polymerization Methods 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011258 core-shell material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000004815 dispersion polymer Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000010525 oxidative degradation reaction Methods 0.000 description 1
- 239000004209 oxidized polyethylene wax Substances 0.000 description 1
- 235000013873 oxidized polyethylene wax Nutrition 0.000 description 1
- 229920002285 poly(styrene-co-acrylonitrile) Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 229920000638 styrene acrylonitrile Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 238000010558 suspension polymerization method Methods 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920006032 ungrafted co-polymer Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
- C08F265/04—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of esters
- C08F265/06—Polymerisation of acrylate or methacrylate esters on to polymers thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
- C08F2/26—Emulsion polymerisation with the aid of emulsifying agents anionic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
- C08F2/30—Emulsion polymerisation with the aid of emulsifying agents non-ionic
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polymerisation Methods In General (AREA)
Abstract
The invention discloses a preparation method of ASA high rubber powder, which belongs to the technical field of ASA high rubber powder, and comprises the following steps: preparing a composite emulsifier, preparing nano polyacrylate microsphere emulsion, preparing acrylate seed latex, and preparing ASA high-glue powder; adding deionized water, nano polyacrylate microsphere emulsion, butyl acrylate, a composite emulsifier, allyl methacrylate and 2-hydroxy-4' - (2-hydroxyethoxy) -2-methyl propiophenone into a closed reaction kettle, sealing the reaction kettle, using nitrogen to replace air in the kettle, performing ultraviolet irradiation, controlling the temperature of the closed reaction kettle to 60-65 ℃, stirring, and discharging; the invention can reduce the particle size, narrow the particle size distribution range, avoid caking in the preparation process, and the prepared ASA high-glue powder has good mechanical property, coloring property, weather resistance and processability.
Description
Technical Field
The invention relates to the technical field of ASA high rubber powder, in particular to a preparation method of ASA high rubber powder.
Background
The ASA high rubber powder is a terpolymer composed of acrylic ester (A), styrene (S) and acrylonitrile (A), and is a typical core-shell impact modifier, wherein the core is acrylic rubber, and the shell is a copolymer of grafted styrene and acrylonitrile. The ASA high rubber powder has good mechanical property, processing property, electrical insulation property, chemical resistance and coloring property similar to the ABS high rubber powder, but the weather resistance of the ASA high rubber powder is far higher than that of the ABS high rubber powder because the ASA high rubber powder is introduced with acrylic rubber without double bonds. The ASA high rubber powder can be used as a toughening modifier, can be used for modifying thermoplastic plastics such as polyvinyl chloride, polycarbonate and nylon, and can be mixed with a styrene-acrylonitrile copolymer to prepare ASA engineering resin, and is widely applied to the fields of automobiles, electronic appliances, outdoor building materials and the like.
The preparation method of ASA high rubber powder mainly comprises two major types of emulsion blending method and grafting method, wherein the grafting method comprises a bulk polymerization method, a suspension polymerization method and an emulsion polymerization method, and in order to reduce the particle size and narrow the particle size distribution range, the most commonly used method at present is the emulsion polymerization method in the grafting method, namely the emulsion grafting polymerization method.
However, in the process of producing ASA high rubber powder by using an emulsion graft polymerization method, the following problems exist: firstly, when a copolymer of styrene and acrylonitrile is grafted on acrylic ester rubber, the problem of low grafting efficiency exists, the mechanical property and the coloring property of ASA high rubber powder can be influenced by the ungrafted copolymer of styrene and acrylonitrile, and in order to improve the grafting efficiency, the most common method is to add a redox initiator, but the addition of the redox initiator is easy to cause the oxidative degradation of the ASA high rubber powder, so that the weather resistance of the ASA high rubber powder is influenced; secondly, the commonly used emulsifying agent in emulsion graft polymerization is a small molecular emulsifying agent, such as sodium dodecyl sulfate, but the addition of the small molecular emulsifying agent can influence the mechanical property of the material, and although the problem can be solved by using a large molecular emulsifying agent, the large molecular emulsifying agent can influence the processability of ASA high rubber powder; thirdly, in the initial stage of emulsion graft polymerization, namely in the process of preparing seed latex, as the reaction speed is gradually increased, the temperature of a reaction system is easily caused to suddenly rise, so that caking is caused, although the initial temperature can be reduced for adjustment, the reaction speed is reduced, a large amount of unreacted monomers exist in latex particles, and the mechanical property and the coloring property of ASA high-grade rubber powder are influenced.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides the preparation method of the ASA high rubber powder, which can reduce the particle size, narrow the particle size distribution range, avoid caking in the preparation process and ensure that the prepared ASA high rubber powder has good mechanical property, coloring property, weather resistance and processability.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the preparation method of the ASA high rubber powder comprises the following steps: preparing a composite emulsifier, preparing nano polyacrylate microsphere emulsion, preparing acrylate seed latex, and preparing ASA high-glue powder;
adding acrylic acid, octadecyl acrylate, allyloxy nonylphenoxy propanol polyoxyethylene ether SN-15, ammonium persulfate and deionized water into a high-shear reaction kettle, controlling the temperature of the high-shear reaction kettle to be 30-40 ℃, controlling the shearing speed to be 2000-2500rpm, shearing for 10-15min, controlling the temperature of the high-shear reaction kettle to be 85-90 ℃, shearing for 4-4.5h, adding sodium hydroxide, arabic gum and sodium acrylamido isopropyl sulfonate, continuously shearing for 40-60min, naturally cooling to room temperature, and discharging to obtain a composite emulsifier;
in the step of preparing the composite emulsifier, the mass ratio of acrylic acid to octadecyl acrylate to allyloxy nonylphenoxy propanol polyoxyethylene ether SN-15 to ammonium persulfate to deionized water to sodium hydroxide to Arabic gum to acrylamide isopropyl sodium sulfonate is 35-36:40-42:1.5-2:2.8-3:110-120:18-20:2.5-3:2-2.5;
adding sodium dodecyl benzene sulfonate, deionized water and tert-butyl acrylate into a reaction kettle, controlling the temperature of the reaction kettle to 80-85 ℃, controlling the stirring speed to 400-500rpm, stirring for 30-50min, dropwise adding an ammonium persulfate aqueous solution into the reaction kettle, controlling the dropwise adding speed to 0.8-1g/min, and continuing stirring for 8-9h after the dropwise adding is finished to obtain the nano polyacrylate microsphere emulsion;
in the step of preparing the nano polyacrylate microsphere emulsion, the mass ratio of the sodium dodecyl benzene sulfonate, deionized water, tert-butyl acrylate and ammonium persulfate aqueous solution is 0.08-0.1:140-150:13-15:6-6.5;
the concentration of the ammonium persulfate aqueous solution is 2-2.2wt%;
adding deionized water, nano polyacrylate microsphere emulsion, butyl acrylate, a composite emulsifier, allyl methacrylate, 2-hydroxy-4' - (2-hydroxyethoxy) -2-methyl propiophenone into a closed reaction kettle, sealing the reaction kettle, replacing air in the reaction kettle by nitrogen, performing ultraviolet irradiation, controlling the ultraviolet wavelength to be 300-380nm, controlling the temperature of the closed reaction kettle to be 60-65 ℃, controlling the stirring speed to be 100-300rpm, stirring for 5-5.5h, and discharging to obtain the acrylate seed latex;
in the step of preparing the acrylic acid ester seed latex, the mass ratio of deionized water, nano polyacrylate microsphere emulsion, butyl acrylate, a composite emulsifier, allyl methacrylate, 2-hydroxy-4' - (2-hydroxyethoxy) -2-methyl propiophenone is 160-180:1-1.2:90-100:4.5-5:0.5-0.6:1.2-1.5;
adding acrylate seed latex, deionized water, nano polyacrylate microsphere emulsion, butyl acrylate, a composite emulsifier and allyl methacrylate into a closed reaction kettle, closing the reaction kettle, carrying out ultraviolet irradiation, controlling the ultraviolet wavelength to be 300-380nm, using nitrogen to replace air in the reaction kettle, controlling the temperature of the closed reaction kettle to be 70-75 ℃, controlling the stirring speed to be 100-300rpm, stirring for 5-5.5h, adding styrene, acrylonitrile and first 2-hydroxy-4 '- (2-hydroxyethoxy) -2-methyl propiophenone, increasing the temperature of the closed reaction kettle to 80-85 ℃, stirring for 20-40min, adding second 2-hydroxy-4' - (2-hydroxyethoxy) -2-methyl propiophenone and citric acid, then dropwise adding mixed monomer liquid, controlling the dropwise acceleration to be 4-5g/min, continuously stirring for 1.5-2h after dropwise adding, reducing the temperature of the closed reaction kettle to 50-55 ℃, adding antioxidant 1076, continuously stirring for 20-40min, naturally cooling to room temperature, opening the closed reaction kettle, and carrying out coagulation, drying to obtain the coagulation powder;
in the step of preparing ASA high rubber powder, the mass ratio of acrylate seed latex, deionized water, nano polyacrylate microsphere emulsion, butyl acrylate, a composite emulsifier, allyl methacrylate, styrene, acrylonitrile, first 2-hydroxy-4 '- (2-hydroxyethoxy) -2-methyl propiophenone, second 2-hydroxy-4' - (2-hydroxyethoxy) -2-methyl propiophenone, citric acid, mixed monomer liquid and antioxidant 1076 is 30-32:220-240:2-2.5:130-140:3.5-4:0.8-1:14-15:6-6.5:0.4-0.5:2-3:1.5-1.8:80-90:2.5-3;
the preparation method of the mixed monomer liquid comprises the steps of adding styrene, acrylonitrile, a composite emulsifier, nano polyacrylate microsphere emulsion and deionized water into a reaction kettle, controlling the temperature of the reaction kettle to 20-40 ℃, controlling the stirring speed to 200-300rpm, and stirring for 30-50min to obtain the mixed monomer liquid;
in the preparation of the mixed monomer liquid, the mass ratio of styrene, acrylonitrile, a composite emulsifier, nano polyacrylate microsphere emulsion and deionized water is 55-58:23-25:3.5-4:1.5-2:30-35.
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the preparation method of the ASA high rubber powder, the composite emulsifier and the nano polyacrylate microsphere emulsion are added in the steps of preparing the acrylic acid ester seed latex and preparing the ASA high rubber powder, so that the particle size can be reduced, the particle size distribution range is narrowed, the average particle size of the ASA latex prepared by the preparation method is 331-348nm, and the polymer dispersibility index of the ASA latex is 0.063-0.066;
(2) According to the preparation method of the ASA high rubber powder, the nano polyacrylate microsphere emulsion is added in the steps of preparing the acrylic acid ester seed latex and preparing the ASA high rubber powder, so that caking is avoided in the preparation process;
(3) According to the preparation method of the ASA high rubber powder, the mechanical properties of the prepared ASA high rubber powder can be improved by adding the composite emulsifier and the nano polyacrylate microsphere emulsion in the steps of preparing the acrylic acid ester seed latex and preparing the ASA high rubber powder, and the ASA resin prepared from the ASA high rubber powder has the tensile strength of 51-54MPa, the bending strength of 73-75MPa and the notch impact strength of 11.5-12.7KJ/m 2 ；
(4) According to the preparation method of the ASA high rubber powder, the coloring performance of the prepared ASA high rubber powder can be improved by adding the composite emulsifier and the nano polyacrylate microsphere emulsion in the steps of preparing the acrylic acid ester seed latex and preparing the ASA high rubber powder, and the coloring performance of ASA resin prepared from the ASA high rubber powder is good;
(5) According to the preparation method of the ASA high rubber powder, the processing performance of the prepared ASA high rubber powder can be improved by adding the composite emulsifier and the nano polyacrylate microsphere emulsion in the steps of preparing the acrylic acid ester seed latex and preparing the ASA high rubber powder, and the melt index (220 ℃ and 10 kg) of the ASA resin prepared by the ASA high rubber powder is 8.7-9.1g/10min;
(6) The preparation method of the ASA high rubber powder comprises the steps of adding a composite emulsifier and nano polyacrylate microspheres in the steps of preparing acrylic acid ester seed latex and preparing the ASA high rubber powderThe emulsion can improve the weather resistance of the prepared ASA high rubber powder, the ASA resin prepared by the ASA high rubber powder is placed under a xenon lamp for continuous irradiation for 1000 hours, the tensile strength is 50-54MPa, the bending strength is 71-74MPa, and the notch impact strength is 11.2-12.5KJ/m 2 。
Detailed Description
Specific embodiments of the present invention will now be described in order to provide a clearer understanding of the technical features, objects and effects of the present invention.
Example 1
A preparation method of ASA high rubber powder specifically comprises the following steps:
1. preparing a composite emulsifier: adding 35g of acrylic acid, 40g of octadecyl acrylate, 1.5g of allyloxy nonylphenoxy propanol polyoxyethylene ether SN-15, 2.8g of ammonium persulfate and 110g of deionized water into a high-shear reaction kettle, controlling the temperature of the high-shear reaction kettle to 30 ℃, controlling the shearing speed to 2000rpm, shearing for 10min, controlling the temperature of the high-shear reaction kettle to 85 ℃, shearing for 4h, adding 18g of sodium hydroxide, 2.5g of Arabic gum and 2g of acrylamide sodium isopropyl sulfonate, continuously shearing for 40min, naturally cooling to room temperature, and discharging to obtain a composite emulsifier;
2. preparing nano polyacrylate microsphere emulsion: adding 0.08g of sodium dodecyl benzene sulfonate, 140g of deionized water and 13g of tert-butyl acrylate into a reaction kettle, controlling the temperature of the reaction kettle to 80 ℃, controlling the stirring speed to 400rpm, stirring for 30min, dropwise adding 6g of ammonium persulfate aqueous solution with the concentration of 2wt% into the reaction kettle, controlling the dropwise adding speed to be 0.8g/min, and continuing stirring for 8h after the dropwise adding is finished to obtain a nano polyacrylate microsphere emulsion;
3. preparing acrylic ester seed latex: 160g of deionized water, 1g of nano polyacrylate microsphere emulsion, 90g of butyl acrylate, 4.5g of composite emulsifier, 0.5g of allyl methacrylate and 1.2g of 2-hydroxy-4' - (2-hydroxyethoxy) -2-methyl propiophenone are added into a closed reaction kettle, the reaction kettle is closed, nitrogen is used for replacing air in the reaction kettle, ultraviolet irradiation is carried out, the ultraviolet wavelength is controlled to be 300nm, the temperature of the closed reaction kettle is controlled to be 60 ℃, the stirring speed is controlled to be 100rpm, stirring is carried out for 5 hours, and the acrylate seed latex is obtained by discharging;
4. preparing ASA high rubber powder: adding 30g of acrylate seed latex, 220g of deionized water, 2g of nano polyacrylate microsphere emulsion, 130g of butyl acrylate, 3.5g of composite emulsifier and 0.8g of allyl methacrylate into a closed reaction kettle, closing the reaction kettle, performing ultraviolet irradiation, controlling the wavelength of ultraviolet light to be 300nm, using nitrogen to replace air in the reaction kettle, controlling the temperature of the closed reaction kettle to be 70 ℃, controlling the stirring speed to be 100rpm, and stirring for 5 hours to obtain the polyacrylate latex with the average particle size of 245 nm; continuously adding 14g of styrene, 6g of acrylonitrile and 0.4g of 2-hydroxy-4 '- (2-hydroxyethoxy) -2-methylbenzophenone into polyacrylate latex, raising the temperature of a closed reaction kettle to 80 ℃, stirring for 20-40min, adding 2g of 2-hydroxy-4' - (2-hydroxyethoxy) -2-methylbenzophenone and 1.5g of citric acid, then dropwise adding 80g of mixed monomer liquid, controlling the dropwise adding speed to be 4g/min, continuously stirring for 1.5h after the dropwise adding is finished, reducing the temperature of the closed reaction kettle to 50 ℃, adding 2.5g of antioxidant 1076, continuously stirring for 20min, naturally cooling to room temperature to obtain ASA latex, opening the closed reaction kettle, and condensing, dehydrating and drying the ASA latex to obtain ASA high-glue powder;
the preparation method of the mixed monomer liquid comprises the following steps: 55g of styrene, 23g of acrylonitrile, 3.5g of composite emulsifier, 1.5g of nano polyacrylate microsphere emulsion and 30g of deionized water are added into a reaction kettle, the temperature of the reaction kettle is controlled to 20 ℃, the stirring speed is controlled to 200rpm, and the mixture is stirred for 30min to obtain mixed monomer liquid.
No caking occurred in the step 3 of this example in the step of preparing the acrylate seed latex.
Example 2
A preparation method of ASA high rubber powder specifically comprises the following steps:
1. preparing a composite emulsifier: adding 35.5g of acrylic acid, 41g of octadecyl acrylate, 1.8g of allyloxy nonylphenoxy propanol polyoxyethylene ether SN-15, 2.9g of ammonium persulfate and 115g of deionized water into a high-shear reaction kettle, controlling the temperature of the high-shear reaction kettle to 35 ℃, controlling the shearing speed to 2200rpm, shearing for 12min, controlling the temperature of the high-shear reaction kettle to 88 ℃, shearing for 4.2h, adding 19g of sodium hydroxide, 2.8g of Arabic gum and 2.2g of acrylamide sodium isopropyl sulfonate, continuously shearing for 50min, naturally cooling to room temperature, and discharging to obtain a composite emulsifier;
2. preparing nano polyacrylate microsphere emulsion: adding 0.09g of sodium dodecyl benzene sulfonate, 145g of deionized water and 14g of tert-butyl acrylate into a reaction kettle, controlling the temperature of the reaction kettle to 82 ℃, controlling the stirring speed to 450rpm, stirring for 40min, dropwise adding 6.2g of ammonium persulfate aqueous solution with the concentration of 2.1wt% into the reaction kettle, controlling the dropwise adding speed to be 0.9g/min, and continuously stirring for 8.5h after the dropwise adding is finished to obtain a nano polyacrylate microsphere emulsion;
3. preparing acrylic ester seed latex: 170g of deionized water, 1.1g of nano polyacrylate microsphere emulsion, 95g of butyl acrylate, 4.8g of composite emulsifier, 0.55g of allyl methacrylate and 1.4g of 2-hydroxy-4' - (2-hydroxyethoxy) -2-methyl propiophenone are added into a closed reaction kettle, the reaction kettle is closed, nitrogen is used for replacing air in the reaction kettle, ultraviolet irradiation is carried out, the ultraviolet wavelength is controlled to be 350nm, the temperature of the closed reaction kettle is controlled to be 62 ℃, the stirring speed is controlled to be 200rpm, stirring is carried out for 5.2h, and the acrylate seed latex is obtained after discharging;
4. preparing ASA high rubber powder: adding 31g of acrylic acid ester seed latex, 230g of deionized water, 2.2g of nano polyacrylate microsphere emulsion, 135g of butyl acrylate, 3.8g of composite emulsifier and 0.9g of allyl methacrylate into a closed reaction kettle, closing the reaction kettle, carrying out ultraviolet irradiation, controlling the wavelength of ultraviolet light to be 350nm, using nitrogen to replace air in the reaction kettle, controlling the temperature of the closed reaction kettle to 72 ℃, controlling the stirring speed to 200rpm, and stirring for 5.2h to obtain the polyacrylate latex with the average particle size of 253 nm; continuously adding 14.5g of styrene, 6.2g of acrylonitrile and 0.45g of 2-hydroxy-4 '- (2-hydroxyethoxy) -2-methyl propiophenone into polyacrylate latex, raising the temperature of a closed reaction kettle to 82 ℃, stirring for 30min, adding 2.5g of 2-hydroxy-4' - (2-hydroxyethoxy) -2-methyl propiophenone and 1.6g of citric acid, then dropwise adding 85g of mixed monomer liquid, controlling the dropwise adding speed to be 4.5g/min, continuously stirring for 1.8h after the dropwise adding, reducing the temperature of the closed reaction kettle to 52 ℃, adding 2.8g of antioxidant 1076, continuously stirring for 30min, naturally cooling to room temperature to obtain ASA latex, opening the closed reaction kettle, and performing condensation, dehydration and drying on the ASA latex to obtain ASA high rubber powder;
the preparation method of the mixed monomer liquid comprises the following steps: 56g of styrene, 24g of acrylonitrile, 3.8g of composite emulsifier, 1.8g of nano polyacrylate microsphere emulsion and 32g of deionized water are added into a reaction kettle, the temperature of the reaction kettle is controlled to 30 ℃, the stirring speed is controlled to 250rpm, and the mixture is stirred for 40min to obtain mixed monomer liquid.
No caking occurred in the step 3 of this example in the step of preparing the acrylate seed latex.
Example 3
A preparation method of ASA high rubber powder specifically comprises the following steps:
1. preparing a composite emulsifier: adding 36g of acrylic acid, 42g of octadecyl acrylate, 2g of allyloxy nonylphenoxy propanol polyoxyethylene ether SN-15, 3g of ammonium persulfate and 120g of deionized water into a high-shear reaction kettle, controlling the temperature of the high-shear reaction kettle to 40 ℃, controlling the shearing speed to 2500rpm, shearing for 15min, controlling the temperature of the high-shear reaction kettle to 90 ℃, shearing for 4.5h, adding 20g of sodium hydroxide, 3g of Arabic gum and 2.5g of acrylamide sodium isopropyl sulfonate, continuously shearing for 60min, naturally cooling to room temperature, and discharging to obtain a composite emulsifier;
2. preparing nano polyacrylate microsphere emulsion: adding 0.1g of sodium dodecyl benzene sulfonate, 150g of deionized water and 15g of tert-butyl acrylate into a reaction kettle, controlling the temperature of the reaction kettle to 85 ℃, controlling the stirring speed to 500rpm, stirring for 50min, dropwise adding 6.5g of ammonium persulfate aqueous solution with the concentration of 2.2wt% into the reaction kettle, controlling the dropwise adding speed to 1g/min, and continuously stirring for 9h after the dropwise adding is finished to obtain a nano polyacrylate microsphere emulsion;
3. preparing acrylic ester seed latex: 180g of deionized water, 1.2g of nano polyacrylate microsphere emulsion, 100g of butyl acrylate, 5g of composite emulsifier, 0.6g of allyl methacrylate and 1.5g of 2-hydroxy-4' - (2-hydroxyethoxy) -2-methyl propiophenone are added into a closed reaction kettle, the reaction kettle is closed, nitrogen is used for replacing air in the reaction kettle, ultraviolet irradiation is carried out, the ultraviolet wavelength is controlled to be 380nm, the temperature of the closed reaction kettle is controlled to be 65 ℃, the stirring speed is controlled to be 300rpm, stirring is carried out for 5.5 hours, and the acrylate seed latex is obtained by discharging;
4. preparing ASA high rubber powder: adding 32g of acrylate seed latex, 240g of deionized water, 2.5g of nano polyacrylate microsphere emulsion, 140g of butyl acrylate, 4g of composite emulsifier and 1g of allyl methacrylate into a closed reaction kettle, closing the reaction kettle, carrying out ultraviolet irradiation, controlling the wavelength of ultraviolet light to be 380nm, using nitrogen to replace air in the reaction kettle, controlling the temperature of the closed reaction kettle to 75 ℃, controlling the stirring speed to 300rpm, and stirring for 5.5 hours to obtain the polyacrylate latex with the average particle size of 261 nm; continuously adding 15g of styrene, 6.5g of acrylonitrile and 0.5g of 2-hydroxy-4 '- (2-hydroxyethoxy) -2-methyl propiophenone into polyacrylate latex, raising the temperature of a closed reaction kettle to 85 ℃, stirring for 20-40min, adding 3g of 2-hydroxy-4' - (2-hydroxyethoxy) -2-methyl propiophenone and 1.8g of citric acid, then dropwise adding 90g of mixed monomer liquid, controlling the dropwise adding speed to be 5g/min, continuously stirring for 2h after the dropwise adding is finished, reducing the temperature of the closed reaction kettle to 55 ℃, adding 3g of antioxidant 1076, continuously stirring for 40min, naturally cooling to room temperature to obtain ASA latex, opening the closed reaction kettle, and condensing, dehydrating and drying the ASA latex to obtain ASA high rubber powder;
the preparation method of the mixed monomer liquid comprises the following steps: 58g of styrene, 25g of acrylonitrile, 4g of composite emulsifier, 2g of nano polyacrylate microsphere emulsion and 35g of deionized water are added into a reaction kettle, the temperature of the reaction kettle is controlled to 40 ℃, the stirring speed is controlled to 300rpm, and the mixed monomer liquid is obtained after stirring for 50 min.
No caking occurred in the step 3 of this example in the step of preparing the acrylate seed latex.
Comparative example 1
The preparation method of the ASA high rubber powder in the embodiment 2 is adopted and is characterized in that: the step of preparing the composite emulsifier in step 1 was omitted, and sodium dodecyl sulfate was used in equal amounts in step 3 and step 4 instead of the addition of the composite emulsifier.
The average particle diameter of the polyacrylate latex obtained in the step of preparing the acrylate seed latex in the step 3 of this comparative example was 422nm, and the agglomeration phenomenon did not occur in this step.
Comparative example 2
The preparation method of the ASA high rubber powder in the embodiment 2 is adopted and is characterized in that: the step of preparing the nano polyacrylate microsphere emulsion in the step 2 is omitted, and the addition of the nano polyacrylate microsphere emulsion is omitted in the step 3 and the step 4.
The average particle diameter of the polyacrylate latex obtained in the step of preparing the acrylate seed latex in the step 3 of this comparative example was 485nm, and the step showed a blocking phenomenon.
Test example 1
The ASA latices obtained in the steps of preparing ASA high rubber powder of examples 1-3 and comparative examples 1-2 were tested for average particle size and polymer dispersion index (PDI value) as follows:
from the above results, it is known that the particle size can be reduced and the particle size distribution range can be narrowed by adding the composite emulsifier and the nano polyacrylate microsphere emulsion in the steps of preparing the acrylic acid ester seed latex and preparing the ASA high rubber powder; the aim of avoiding caking in the preparation can be realized by adding the nano polyacrylate microsphere emulsion in the steps of preparing the acrylic acid ester seed latex and preparing the ASA high-rubber powder;
the composite emulsifier consists of polyacrylate emulsifier, reactive emulsifier sodium acrylamido isopropyl sulfonate and acacia, wherein the polyacrylate emulsifier can play the role of an emulsifier, and the use of other small-molecule emulsifiers and macromolecular emulsifiers can be avoided by using the polyacrylate emulsifier, so that the influence on the mechanical property and the processing property of the material is avoided; the reactive emulsifier sodium acrylamido isopropyl sulfonate has strong emulsifying capacity and hydrophilicity, can react with acrylic ester monomers, reduces the content of unreacted monomers in the reactive monomers, generally is directly added into the preparation of acrylic ester seed latex, but can quickly polymerize with a part of butyl acrylate in the early stage of the preparation of acrylic ester seed latex, so that the average particle size is overlarge, the particle size distribution range is overlarge, and the emulsifying performance is reduced;
the nano polyacrylate microsphere emulsion is nano polyacrylate with microsphere structure, and in the step of preparing the acrylate seed latex, on one hand, the nano polyacrylate microsphere can play a role in heat dissipation, and agglomeration caused by overhigh temperature is avoided; on the other hand, butyl acrylate is polymerized by taking the nano polyacrylate microsphere as the center, so that the reaction speed can be controlled, the particle size is reduced, and the particle size distribution range is narrowed; in the step of preparing ASA high rubber powder, a structure with polyacrylate as a core, a copolymer of styrene and acrylonitrile as a first shell layer and a copolymer of styrene, acrylonitrile and nano polyacrylate microspheres as a second shell layer can be formed, so that the mechanical property of the ASA high rubber powder can be improved, and the high surface area of the nano polyacrylate microspheres can provide a larger reaction area for the styrene and the acrylonitrile, thereby reducing the content of unreacted monomers.
Test example 2
ASA high rubber powder prepared in examples 1-3 and comparative examples 1-2 is prepared into ASA resin by the following specific preparation method:
adding 70 parts by weight of SAN resin, 30 parts by weight of ASA high-rubber powder, 0.5 part by weight of oxidized polyethylene wax and 1 part by weight of carbon black into a high-speed mixer, uniformly mixing, adding into a double-screw extruder for extrusion and granulation, adding into an injection molding machine for injection molding to prepare a test sample, and testing the tensile strength, bending strength, notch impact strength, coloring property, volume resistivity and melt index of the test sample, wherein the test result is as follows:
placing the test sample under a xenon lamp for continuous irradiation, controlling the temperature at 23 ℃ during continuous irradiation, controlling the power of the xenon lamp to be 6KW, and testing the tensile strength, the bending strength and the notch impact strength of the test sample after 1000 hours of continuous irradiation, wherein the test results are as follows:
from the above results, it can be seen that the purposes of improving the mechanical property, the coloring property, the weather resistance and the processing property of the prepared ASA high-glue powder can be achieved by adding the composite emulsifier and the nano polyacrylate microsphere emulsion in the steps of preparing the acrylic acid ester seed latex and preparing the ASA high-glue powder;
wherein, the mechanical property, the coloring property and the weather resistance are realized by reducing the quantity of unreacted monomers and avoiding the introduction of emulsifying agents and initiating agents of other components;
on one hand, the processing performance, namely the melt index, is improved, and on the other hand, the composite emulsifier and the nano polyacrylate microspheres can reduce the particle size, reduce the particle size distribution range and reduce the content of other impurities, so that the melt index is improved; on the other hand, the nano polyacrylate microsphere is added into the second shell layer, so that the surface viscosity of ASA high rubber powder can be reduced, and the processing performance is improved.
The percentages used in the present invention are mass percentages unless otherwise indicated.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The preparation method of the ASA high rubber powder is characterized by comprising the following steps: preparing a composite emulsifier, preparing nano polyacrylate microsphere emulsion, preparing acrylate seed latex, and preparing ASA high-glue powder;
adding acrylic acid, octadecyl acrylate, allyloxy nonylphenoxy propanol polyoxyethylene ether SN-15, ammonium persulfate and deionized water into a high-shear reaction kettle, controlling the temperature of the high-shear reaction kettle to 30-40 ℃, shearing, controlling the temperature of the high-shear reaction kettle to 85-90 ℃, shearing, adding sodium hydroxide, arabic gum and acrylamide sodium isopropyl sulfonate, continuously shearing, naturally cooling to room temperature, and discharging to obtain the composite emulsifier;
adding sodium dodecyl benzene sulfonate, deionized water and tert-butyl acrylate into a reaction kettle, controlling the temperature of the reaction kettle to 80-85 ℃, stirring, dropwise adding an ammonium persulfate aqueous solution into the reaction kettle, and continuing stirring after the dropwise adding is finished to obtain a nano polyacrylate microsphere emulsion;
adding deionized water, nano polyacrylate microsphere emulsion, butyl acrylate, a composite emulsifier, allyl methacrylate, 2-hydroxy-4' - (2-hydroxyethoxy) -2-methyl propiophenone into a closed reaction kettle, sealing the reaction kettle, replacing air in the reaction kettle by nitrogen, performing ultraviolet irradiation, controlling the temperature of the closed reaction kettle to 60-65 ℃, stirring, and discharging to obtain the acrylate seed latex;
adding acrylate seed latex, deionized water, nano polyacrylate microsphere emulsion, butyl acrylate, a composite emulsifier and allyl methacrylate into a closed reaction kettle, sealing the reaction kettle, performing ultraviolet irradiation, using nitrogen to replace air in the reaction kettle, controlling the temperature of the closed reaction kettle to 70-75 ℃, stirring, adding styrene, acrylonitrile and first 2-hydroxy-4 '- (2-hydroxyethoxy) -2-methyl propiophenone, increasing the temperature of the closed reaction kettle to 80-85 ℃, stirring, adding second 2-hydroxy-4' - (2-hydroxyethoxy) -2-methyl propiophenone and citric acid, then dropwise adding mixed monomer liquid, continuously stirring after the dropwise adding, reducing the temperature of the closed reaction kettle to 50-55 ℃, adding an antioxidant 1076, continuously stirring, naturally cooling to room temperature, opening the closed reaction kettle, and performing condensation, dehydration and drying to obtain ASA high-glue powder;
the preparation method of the mixed monomer liquid comprises the steps of adding styrene, acrylonitrile, a composite emulsifier, nano polyacrylate microsphere emulsion and deionized water into a reaction kettle, controlling the temperature of the reaction kettle to 20-40 ℃, and stirring to obtain the mixed monomer liquid.
2. The method for preparing ASA high rubber powder according to claim 1, wherein in the step of preparing the composite emulsifier, the mass ratio of acrylic acid, octadecyl acrylate, allyloxy nonylphenoxy propanol polyoxyethylene ether SN-15, ammonium persulfate, deionized water, sodium hydroxide, arabic gum and sodium acrylamido isopropyl sulfonate is 35-36:40-42:1.5-2:2.8-3:110-120:18-20:2.5-3:2-2.5.
3. The method for preparing ASA high rubber powder according to claim 1, wherein in the step of preparing the nano polyacrylate microsphere emulsion, the mass ratio of the sodium dodecyl benzene sulfonate, deionized water, tert-butyl acrylate and ammonium persulfate aqueous solution is 0.08-0.1:140-150:13-15:6-6.5;
the concentration of the ammonium persulfate aqueous solution is 2-2.2wt%;
the dropping speed of the ammonium persulfate aqueous solution is 0.8-1g/min.
4. The method for preparing the ASA high rubber powder according to claim 1, wherein in the step of preparing the acrylic acid ester seed latex, the mass ratio of deionized water, nano polyacrylate microsphere emulsion, butyl acrylate, composite emulsifier, allyl methacrylate, 2-hydroxy-4' - (2-hydroxyethoxy) -2-methyl propiophenone is 160-180:1-1.2:90-100:4.5-5:0.5-0.6:1.2-1.5;
the ultraviolet light wavelength is 300-380nm when the ultraviolet light irradiates.
5. The method for preparing the ASA high rubber powder according to claim 1, wherein in the step of preparing the ASA high rubber powder, the mass ratio of the acrylic acid ester seed latex to deionized water to the nano polyacrylate microsphere emulsion to the butyl acrylate to the composite emulsifier to the allyl methacrylate to the styrene to the acrylonitrile to the first 2-hydroxy-4 '- (2-hydroxyethoxy) -2-methyl propiophenone to the second 2-hydroxy-4' - (2-hydroxyethoxy) -2-methyl propiophenone to the citric acid to the mixed monomer liquid to the antioxidant 1076 is 30-32:220-240:2-2.5:130-140:3.5-4:0.8-1:14-15:6-6.5:0.4-0.5:2-3:1.5-1.8:80-90:2.5-3;
the ultraviolet light wavelength is 300-380nm when the ultraviolet light irradiates;
the dripping speed of the mixed monomer liquid is 4-5g/min.
6. The method for preparing ASA high rubber powder according to claim 1, wherein in the preparation of the mixed monomer liquid, the mass ratio of styrene, acrylonitrile, composite emulsifier, nano polyacrylate microsphere emulsion and deionized water is 55-58:23-25:3.5-4:1.5-2:30-35.
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