CN111925548A - Polycarbonate material with high surface hardness and preparation method thereof - Google Patents
Polycarbonate material with high surface hardness and preparation method thereof Download PDFInfo
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- CN111925548A CN111925548A CN202010899319.8A CN202010899319A CN111925548A CN 111925548 A CN111925548 A CN 111925548A CN 202010899319 A CN202010899319 A CN 202010899319A CN 111925548 A CN111925548 A CN 111925548A
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- polycarbonate
- surface hardness
- high surface
- raw materials
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- 239000004417 polycarbonate Substances 0.000 title claims abstract description 119
- 229920000515 polycarbonate Polymers 0.000 title claims abstract description 95
- 239000000463 material Substances 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 239000004033 plastic Substances 0.000 claims abstract description 40
- 229920003023 plastic Polymers 0.000 claims abstract description 40
- 239000002994 raw material Substances 0.000 claims abstract description 40
- 239000000758 substrate Substances 0.000 claims abstract description 38
- 238000000576 coating method Methods 0.000 claims abstract description 33
- 239000011248 coating agent Substances 0.000 claims abstract description 32
- 229920005989 resin Polymers 0.000 claims abstract description 27
- 239000011347 resin Substances 0.000 claims abstract description 27
- 239000007822 coupling agent Substances 0.000 claims abstract description 26
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 26
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 26
- 239000003822 epoxy resin Substances 0.000 claims abstract description 24
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 24
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 10
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 10
- 239000002270 dispersing agent Substances 0.000 claims abstract description 10
- 239000000314 lubricant Substances 0.000 claims abstract description 10
- 239000011247 coating layer Substances 0.000 claims abstract description 9
- RRAFCDWBNXTKKO-UHFFFAOYSA-N eugenol Chemical compound COC1=CC(CC=C)=CC=C1O RRAFCDWBNXTKKO-UHFFFAOYSA-N 0.000 claims description 24
- 239000002245 particle Substances 0.000 claims description 19
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 15
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 claims description 14
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 14
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- NPBVQXIMTZKSBA-UHFFFAOYSA-N Chavibetol Natural products COC1=CC=C(CC=C)C=C1O NPBVQXIMTZKSBA-UHFFFAOYSA-N 0.000 claims description 12
- 239000005770 Eugenol Substances 0.000 claims description 12
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 12
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 12
- UVMRYBDEERADNV-UHFFFAOYSA-N Pseudoeugenol Natural products COC1=CC(C(C)=C)=CC=C1O UVMRYBDEERADNV-UHFFFAOYSA-N 0.000 claims description 12
- 229960002217 eugenol Drugs 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 claims description 12
- 229920002545 silicone oil Polymers 0.000 claims description 12
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 10
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 9
- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 claims description 9
- 239000000395 magnesium oxide Substances 0.000 claims description 8
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 8
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 8
- 239000004925 Acrylic resin Substances 0.000 claims description 7
- 229920000178 Acrylic resin Polymers 0.000 claims description 7
- LCFVJGUPQDGYKZ-UHFFFAOYSA-N Bisphenol A diglycidyl ether Chemical compound C=1C=C(OCC2OC2)C=CC=1C(C)(C)C(C=C1)=CC=C1OCC1CO1 LCFVJGUPQDGYKZ-UHFFFAOYSA-N 0.000 claims description 7
- 239000004593 Epoxy Substances 0.000 claims description 7
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 7
- 230000004048 modification Effects 0.000 claims description 7
- 238000012986 modification Methods 0.000 claims description 7
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical compound CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 claims description 6
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 239000003960 organic solvent Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 150000004645 aluminates Chemical class 0.000 claims description 5
- 239000013078 crystal Substances 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 4
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 3
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 3
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 claims description 3
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 239000002131 composite material Substances 0.000 abstract description 3
- 230000002708 enhancing effect Effects 0.000 abstract description 3
- 230000002787 reinforcement Effects 0.000 abstract description 3
- 230000001965 increasing effect Effects 0.000 description 8
- 238000006748 scratching Methods 0.000 description 5
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 4
- 230000002393 scratching effect Effects 0.000 description 4
- -1 Octylene alcohol Chemical compound 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/046—Forming abrasion-resistant coatings; Forming surface-hardening coatings
-
- 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
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/06—Coating with compositions not containing macromolecular substances
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
- C09D183/06—Polysiloxanes containing silicon bound to oxygen-containing groups
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/66—Additives characterised by particle size
- C09D7/67—Particle size smaller than 100 nm
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/20—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/222—Magnesia, i.e. magnesium oxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2244—Oxides; Hydroxides of metals of zirconium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Inorganic Chemistry (AREA)
- Nanotechnology (AREA)
- Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention belongs to the technical field of polycarbonate materials, and particularly relates to a polycarbonate material with high surface hardness and a preparation method thereof. The polycarbonate material with high surface hardness comprises a polycarbonate substrate and a hardening coating coated on the polycarbonate substrate; the polycarbonate substrate comprises the following raw materials in percentage by mass: 35-40% of silicon-copolymerized PC plastic; 8-12% of acrylic; 4-8% of ASA resin; 3-7% of PCTG plastic; 2-5% of nano metal oxide; 0.05-0.1% of a coupling agent; 0.5-1.5% of epoxy resin; 0.2-0.6% of antioxidant; 0.1-0.4% of a lubricant; 0.3-0.7% of a dispersant; 0.3-0.7% of toner; the balance being PC resin. The polycarbonate material with high surface hardness can improve the strength, hardness and wear resistance of the composite material by adding the nano metal oxide as a reinforcement; the hardening coating layer plays a role in enhancing the surface hardness; the invention also discloses a preparation method of the polycarbonate material with high surface hardness.
Description
Technical Field
The invention belongs to the technical field of polycarbonate materials, and particularly relates to a polycarbonate material with high surface hardness and a preparation method thereof.
Background
The material of the mobile phone rear cover in the prior art mainly comprises glass, ceramics and plastics. Glass and ceramics have the advantages of high hardness and less scratching, and have the disadvantages of high cost, fragility, low productivity, complex processing and high fraction defective. Plastics have the advantages of being not brittle and easy to process, and have the disadvantages of low surface hardness, easy scratching and low transparency. The plastic shell in the prior art needs to be surface-hardened to enhance the surface hardness, such as by using a hardening agent, but such chemical agents cause chemical corrosion and contamination.
Disclosure of Invention
The invention aims to provide a polycarbonate material with high surface hardness and a preparation method thereof, and aims to solve the technical problem that the surface hardness of a plastic mobile phone rear cover in the prior art is low.
In order to achieve the purpose, the invention provides a polycarbonate material with high surface hardness, which comprises a polycarbonate substrate and a hardening coating coated on the polycarbonate substrate; the polycarbonate substrate comprises the following raw materials in percentage by mass:
35-40% of silicon-copolymerized PC plastic;
8-12% of acrylic;
4-8% of ASA resin;
3-7% of PCTG plastic;
2-5% of nano metal oxide;
0.05-0.1% of a coupling agent;
0.5-1.5% of epoxy resin;
0.2-0.6% of antioxidant;
0.1-0.4% of a lubricant;
0.3-0.7% of a dispersant;
0.3-0.7% of toner;
the balance being PC resin.
Preferably, the hardening coating comprises the following raw materials: the mass ratio of the methyltrimethoxysilane to the ethyl orthosilicate to the gamma-methacryloxypropyltrimethoxysilane is 1.8-2.4: 2.8-3.8: 1.
preferably, the silicon copolymerized PC plastic comprises the following raw materials in percentage by mass: 96-98% of polycarbonate and 2-4% of eugenol silicone oil; the eugenol silicone oil comprises the following raw materials in percentage by mass: 88-92% of hydrogen-containing silicone oil, 7-11% of eugenol and 0.1-1% of chloroplatinic acid octyl alcohol solution; the mass fraction of chloroplatinic acid in the chloroplatinic acid octyl alcohol solution is 1-3%.
Preferably, the nano metal oxide is selected from one or more than one of nano magnesium oxide, nano zirconium oxide or nano aluminum oxide; the crystal form of the nano aluminum oxide is preferably alpha type, and the particle size of the nano aluminum oxide is preferably 25-35 nm; the particle size of the nano zirconia is preferably 80-100 nm; the particle size of the nano magnesium oxide is preferably 40-70 nm.
Preferably, the acrylic is a cross-linked acrylic, which comprises the following raw materials in percentage by mass: methyl methacrylate, styrene, methacrylic acid, azobisisobutyronitrile, and divinylbenzene; the mass ratio of the five raw materials is 30-34: 19-23: 5-7: 0.1-0.3: 1.
preferably, the MFR value of the acrylic resin is preferably 10-13 g/10min, and the MFR value of the ASA resin is preferably 25-27 g/10 min.
Preferably, the epoxy resin is DGEBA type epoxy resin, and the epoxy equivalent is 190-200.
Preferably, the coupling agent is one or more selected from aluminate coupling agent, silane coupling agent Z-6030 or phthalate coupling agent.
The invention also provides a preparation method of the polycarbonate material with high surface hardness, which comprises the following steps:
1) pretreatment: the coupling agent and the nano metal oxide are weighed according to the proportion and added into a high-speed mixer to be stirred at a high speed for 8-12 minutes for surface modification;
2) preparing a hardening coating: weighing methyl trimethoxy silane, ethyl orthosilicate and gamma-methacryloxypropyl trimethoxy silane according to the proportion, and adding deionized water and isopropanol; then adding hydrochloric acid to adjust the pH value of the system to 2, and stirring and mixing uniformly; standing for 1-3 hours, adding a curing agent accounting for 0.1-0.3% of the total mass of the raw materials and a flatting agent accounting for 0.5-2% of the total mass of the raw materials, and adding an organic solvent to adjust the solid content of the raw materials to 16-18% to obtain the hardening coating;
3) and (3) extrusion molding: adding PC resin, silicon-copolymerized PC plastic, acrylic, ASA resin, PCTG plastic, epoxy resin, an antioxidant, a lubricant, a dispersing agent, toner and the pretreated nano metal oxide into an extruder, mixing and granulating; extruding the materials from an extruder and then cutting the materials into particles to prepare polycarbonate modified plastics;
4) spraying: the polycarbonate modified plastic is prepared into a polycarbonate substrate, the polycarbonate substrate is soaked in a potassium dichromate solution for 4-6 minutes, and then is ultrasonically cleaned for 3-6 minutes by a sodium hydroxide solution to remove impurities on the surface of the polycarbonate substrate; immersing the pretreated polycarbonate substrate into the hardening coating, and uniformly lifting, wherein the lifting speed is 10-20 cm/min; pre-drying for 20-25 minutes at the temperature of 60-70 ℃, then heating to 115-125 ℃, heating and curing for 2-4 hours, and forming a hardening coating layer of 2-8 microns on the polycarbonate substrate to obtain the high-surface-hardness polycarbonate material.
The technical scheme or the technical schemes in the polycarbonate material with high surface hardness and the preparation method thereof provided by the embodiment of the invention at least have one of the following technical effects:
1. the polycarbonate material with high surface hardness can improve the strength, hardness and wear resistance of the composite material by adding the nano metal oxide as a reinforcement; the hardening coating layer plays a role in enhancing the surface hardness; the polycarbonate with high surface hardness has excellent surface hardness, and the surface hardness can reach 4H at most through tests; the anti-scratching liquid is applied to the rear cover of the mobile phone, and has the characteristic of difficult scratching;
2. the hardening coating has the characteristics of high surface hardness and good coating adhesion performance; through tests, the adhesive force is grade 1, the surface of the coating is smooth and transparent, and the permeability is increased by 3-4%.
3. The polycarbonate material with high surface hardness is modified by adding high-hardness acrylic; the acrylic acid is introduced with styrene, methacrylic acid and divinylbenzene to improve the surface hardness of the acrylic acid, the introduction of the divinylbenzene can change a linear structure of a polymer into a body structure, and the addition of the methacrylic acid is favorable for forming intermolecular hydrogen bonds and increasing intermolecular acting force, which are favorable for increasing the surface hardness; the introduction of styrene decreases the activity of the main chain, thereby increasing the surface hardness thereof.
Detailed Description
The present invention will be further described with reference to the following examples, but the embodiments of the present invention are not limited thereto.
The embodiment of the invention provides a polycarbonate material with high surface hardness, which comprises a polycarbonate substrate and a hardening coating coated on the polycarbonate substrate; the polycarbonate substrate comprises the following raw materials in percentage by mass: 35-40% of silicon-copolymerized PC plastic; 8-12% of acrylic; 4-8% of ASA resin; 3-7% of PCTG plastic; 2-5% of nano metal oxide; 0.05-0.1% of a coupling agent; 0.5-1.5% of epoxy resin; 0.2-0.6% of antioxidant; 0.1-0.4% of a lubricant; 0.3-0.7% of a dispersant; 0.3-0.7% of toner; the balance being PC resin. The polycarbonate material with high surface hardness can improve the strength, hardness and wear resistance of the composite material by adding the nano metal oxide as a reinforcement; the hardening coating layer plays a role in enhancing the surface hardness; the polycarbonate with high surface hardness has excellent surface hardness, and the surface hardness can reach 4H at most through tests; the mobile phone cover is applied to a mobile phone rear cover and has the characteristic of difficult scratching.
Preferably, the hardening coating comprises the following raw materials: the mass ratio of the methyltrimethoxysilane to the ethyl orthosilicate to the gamma-methacryloxypropyltrimethoxysilane is 1.8-2.4: 2.8-3.8: 1. the hardening coating has the characteristics of high surface hardness and good coating adhesion performance; through tests, the adhesive force is grade 1, the surface of the coating is smooth and transparent, and the permeability is increased by 3-4%.
Preferably, the silicon copolymerized PC plastic comprises the following raw materials in percentage by mass: 96-98% of polycarbonate and 2-4% of eugenol silicone oil; the eugenol silicone oil comprises the following raw materials in percentage by mass: 88-92% of hydrogen-containing silicone oil, 7-11% of eugenol and 0.1-1% of chloroplatinic acid octyl alcohol solution; the mass fraction of chloroplatinic acid in the chloroplatinic acid octyl alcohol solution is 1-3%.
Preferably, the nano metal oxide is selected from one or more than one of nano magnesium oxide, nano zirconium oxide or nano aluminum oxide; the crystal form of the nano aluminum oxide is preferably alpha type, and the particle size of the nano aluminum oxide is preferably 25-35 nm; the particle size of the nano zirconia is preferably 80-100 nm; the particle size of the nano magnesium oxide is preferably 40-70 nm.
Preferably, the acrylic is a cross-linked acrylic, which comprises the following raw materials in percentage by mass: methyl methacrylate, styrene, methacrylic acid, azobisisobutyronitrile, and divinylbenzene; the mass ratio of the five raw materials is 30-34: 19-23: 5-7: 0.1-0.3: 1. the polycarbonate material with high surface hardness is modified by adding high-hardness acrylic; the acrylic acid is introduced with styrene, methacrylic acid and divinylbenzene to improve the surface hardness of the acrylic acid, the introduction of the divinylbenzene can change a linear structure of a polymer into a body structure, and the addition of the methacrylic acid is favorable for forming intermolecular hydrogen bonds and increasing intermolecular acting force, which are favorable for increasing the surface hardness; the introduction of styrene decreases the activity of the main chain, thereby increasing the surface hardness thereof.
Preferably, the MFR value of the acrylic resin is preferably 10-13 g/10min, and the MFR value of the ASA resin is preferably 25-27 g/10 min.
Preferably, the epoxy resin is DGEBA type epoxy resin, and the epoxy equivalent is 190-200.
Preferably, the coupling agent is one or more selected from aluminate coupling agent, silane coupling agent Z-6030 or phthalate coupling agent.
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to further illustrate features and advantages of the invention, and not to limit the scope of the claims. In the following examples, the starting materials used were commercially available products.
The raw material ratios of the polycarbonate materials with high surface hardness in examples 1 to 4 are shown in table 1.
TABLE 1
The mass ratios of the raw materials of the hard coat layers in examples 1 to 4 are shown in Table 2.
The raw material ratios of the silicon-copolymerized PC plastics in examples 1 to 4 are shown in Table 3.
TABLE 3
| Name of raw materials | Example 1 | Example 2 | Example 3 | Example 4 |
| Polycarbonate (%) | 96 | 97 | 97.5 | 98 |
| Eugenol silicone oil (%) | 4 | 3 | 2.5 | 2 |
The raw material ratios of the eugenol silicone oils in examples 1 to 4 are shown in table 4.
TABLE 4
| Name of raw materials | Example 1 | Example 2 | Example 3 | Example 4 |
| Hydrogen-containing Silicone oil (%) | 92 | 88 | 90.9 | 89.5 |
| Eugenol (%) | 7 | 11 | 9 | 10 |
| Octylene alcohol chloroplatinate solution (%) | 1 | 1 | 0.1 | 0.5 |
The raw material mass ratios of the acryl in examples 1 to 4 are shown in Table 5.
Example 1
The embodiment provides a preparation method of the polycarbonate material with high surface hardness, which comprises the following steps:
1) pretreatment: the coupling agent and the nano metal oxide are weighed according to the proportion and added into a high-speed mixer to be stirred for 8 minutes at a high speed for surface modification;
2) preparing a hardening coating: weighing methyl trimethoxy silane, ethyl orthosilicate and gamma-methacryloxypropyl trimethoxy silane according to the proportion, and adding deionized water and isopropanol; then adding hydrochloric acid to adjust the pH value of the system to 2, and stirring and mixing uniformly; standing for 1 hour, adding a curing agent accounting for 0.1 percent of the total mass of the raw materials and a flatting agent accounting for 0.5 percent of the total mass of the raw materials, and adding an organic solvent to adjust the solid content to 16 percent to prepare the hardening coating;
3) and (3) extrusion molding: adding PC resin, silicon-copolymerized PC plastic, acrylic, ASA resin, PCTG plastic, epoxy resin, an antioxidant, a lubricant, a dispersing agent, toner and the pretreated nano metal oxide into an extruder, mixing and granulating; extruding the materials from an extruder and then cutting the materials into particles to prepare polycarbonate modified plastics;
4) spraying: the polycarbonate substrate is prepared from the polycarbonate modified plastic, and is soaked in a potassium dichromate solution for 4 minutes and then ultrasonically cleaned for 3 minutes by a sodium hydroxide solution to remove impurities on the surface of the polycarbonate substrate; immersing the pretreated polycarbonate substrate into the hardening coating, and uniformly pulling at a speed of 10 cm/min; and (3) pre-drying at the temperature of 60 ℃ for 25 minutes, then heating to 115 ℃ and curing for 4 hours by heating, so that a hardening coating layer of 2 microns is formed on the polycarbonate substrate, and the polycarbonate material with high surface hardness is prepared.
Wherein, the nano metal oxide is nano magnesium oxide, and the particle size of the nano magnesium oxide is preferably 40 nm. The MFR value of the acrylic resin is preferably 10g/10min, and the MFR value of the ASA resin is preferably 25g/10 min. The epoxy resin is preferably a DGEBA type epoxy resin, and the epoxy equivalent is preferably 190. The coupling agent is a silane coupling agent Z-6030.
Example 2
The embodiment provides a preparation method of the polycarbonate material with high surface hardness, which comprises the following steps:
1) pretreatment: the coupling agent and the nano metal oxide are weighed according to the proportion and added into a high-speed mixer to be stirred for 10 minutes at a high speed for surface modification;
2) preparing a hardening coating: weighing methyl trimethoxy silane, ethyl orthosilicate and gamma-methacryloxypropyl trimethoxy silane according to the proportion, and adding deionized water and isopropanol; then adding hydrochloric acid to adjust the pH value of the system to 2, and stirring and mixing uniformly; standing for 2 hours, adding a curing agent accounting for 0.2 percent of the total mass of the raw materials and a flatting agent accounting for 1 percent of the total mass of the raw materials, and adding an organic solvent to adjust the solid content to 17 percent to prepare the hardening coating;
3) and (3) extrusion molding: adding PC resin, silicon-copolymerized PC plastic, acrylic, ASA resin, PCTG plastic, epoxy resin, an antioxidant, a lubricant, a dispersing agent, toner and the pretreated nano metal oxide into an extruder, mixing and granulating; extruding the materials from an extruder and then cutting the materials into particles to prepare polycarbonate modified plastics;
4) spraying: the polycarbonate substrate is prepared from the polycarbonate modified plastic, and is soaked in a potassium dichromate solution for 5 minutes and then ultrasonically cleaned for 4 minutes by a sodium hydroxide solution to remove impurities on the surface of the polycarbonate substrate; immersing the pretreated polycarbonate substrate into the hardening coating, and uniformly pulling at a speed of 15 cm/min; and (3) pre-drying at 65 ℃ for 22 minutes, then heating to 120 ℃, and heating and curing for 3 hours to form a hardening coating layer of 5 microns on the polycarbonate substrate, thereby preparing the polycarbonate material with high surface hardness.
Wherein the nano metal oxide is nano zirconia; the particle size of the nano zirconia is preferably 80 nm. The MFR value of the acrylic resin is preferably 12g/10min, and the MFR value of the ASA resin is preferably 26g/10 min. The epoxy resin is preferably a DGEBA type epoxy resin, and the epoxy equivalent is preferably 195. The coupling agent is phthalate ester coupling agent.
Example 3
The embodiment provides a preparation method of the polycarbonate material with high surface hardness, which comprises the following steps:
1) pretreatment: the coupling agent and the nano metal oxide are weighed according to the proportion and added into a high-speed mixer to be stirred for 11 minutes at a high speed for surface modification;
2) preparing a hardening coating: weighing methyl trimethoxy silane, ethyl orthosilicate and gamma-methacryloxypropyl trimethoxy silane according to the proportion, and adding deionized water and isopropanol; then adding hydrochloric acid to adjust the pH value of the system to 2, and stirring and mixing uniformly; standing for 2.5 hours, adding a curing agent accounting for 0.25 percent of the total mass of the raw materials and a flatting agent accounting for 1.5 percent of the total mass of the raw materials, and adding an organic solvent to adjust the solid content to 17 percent to prepare the hardening coating;
3) and (3) extrusion molding: adding PC resin, silicon-copolymerized PC plastic, acrylic, ASA resin, PCTG plastic, epoxy resin, an antioxidant, a lubricant, a dispersing agent, toner and the pretreated nano metal oxide into an extruder, mixing and granulating; extruding the materials from an extruder and then cutting the materials into particles to prepare polycarbonate modified plastics;
4) spraying: the polycarbonate substrate is prepared from the polycarbonate modified plastic, and is soaked in a potassium dichromate solution for 5 minutes and then ultrasonically cleaned for 5 minutes by a sodium hydroxide solution to remove impurities on the surface of the polycarbonate substrate; immersing the pretreated polycarbonate substrate into the hardening coating, and uniformly pulling at a speed of 18 cm/min; and (3) pre-drying at the temperature of 68 ℃ for 21 minutes, then heating to 120 ℃, and heating and curing for 3 hours to form a hardening coating layer of 6 microns on the polycarbonate substrate, thereby preparing the polycarbonate material with high surface hardness.
Wherein the nano metal oxide is nano aluminum oxide; the crystal form of the nano-alumina is preferably alpha-type, and the particle size of the nano-alumina is preferably 30 nm. The MFR value of the acrylic resin is preferably 12g/10min, and the MFR value of the ASA resin is preferably 26g/10 min. The epoxy resin is preferably a DGEBA type epoxy resin, and the epoxy equivalent is preferably 280. The coupling agent is an aluminate coupling agent.
Example 4
The embodiment provides a preparation method of the polycarbonate material with high surface hardness, which comprises the following steps:
1) pretreatment: the coupling agent and the nano metal oxide are weighed according to the proportion and added into a high-speed mixer to be stirred at a high speed for 12 minutes for surface modification;
2) preparing a hardening coating: weighing methyl trimethoxy silane, ethyl orthosilicate and gamma-methacryloxypropyl trimethoxy silane according to the proportion, and adding deionized water and isopropanol; then adding hydrochloric acid to adjust the pH value of the system to 2, and stirring and mixing uniformly; standing for 3 hours, adding a curing agent accounting for 0.3 percent of the total mass of the raw materials and a flatting agent accounting for 2 percent of the total mass of the raw materials, and adding an organic solvent to adjust the solid content to 16-18 percent to prepare the hardening coating;
3) and (3) extrusion molding: adding PC resin, silicon-copolymerized PC plastic, acrylic, ASA resin, PCTG plastic, epoxy resin, an antioxidant, a lubricant, a dispersing agent, toner and the pretreated nano metal oxide into an extruder, mixing and granulating; extruding the materials from an extruder and then cutting the materials into particles to prepare polycarbonate modified plastics;
4) spraying: the polycarbonate substrate is prepared from the polycarbonate modified plastic, and is soaked in a potassium dichromate solution for 6 minutes and then ultrasonically cleaned for 6 minutes by a sodium hydroxide solution to remove impurities on the surface of the polycarbonate substrate; immersing the pretreated polycarbonate substrate into the hardening coating, and uniformly pulling at a speed of 20 cm/min; and (3) pre-drying at the temperature of 70 ℃ for 20 minutes, then heating to 125 ℃, and heating and curing for 4 hours to form a hardening coating layer of 8 microns on the polycarbonate substrate, thereby preparing the polycarbonate material with high surface hardness.
Wherein the nano metal oxide is nano aluminum oxide; the crystal form of the nano-alumina is preferably alpha-type, and the particle size of the nano-alumina is preferably 35 nm. The MFR value of the acrylic resin is preferably 13g/10min, and the MFR value of the ASA resin is preferably 27g/10 min. The epoxy resin is preferably a DGEBA type epoxy resin, and the epoxy equivalent is preferably 200. The coupling agent is an aluminate coupling agent.
Example 5
The polycarbonate materials with high surface hardness prepared in examples 1-3 were tested for pencil hardness and coating adhesion, and the test results are shown in Table 6:
TABLE 6
| Test items | Hardness of pencil | Adhesion of coatings |
| Detection standard | GB/T 6738 | GB 1720 |
| Example 1 | 3H | Level 1 |
| Example 2 | 4H | Level 1 |
| Example 3 | 4H | Level 1 |
| Example 4 | 4H | Level 1 |
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The polycarbonate material with high surface hardness is characterized by comprising a polycarbonate substrate and a hardening coating coated on the polycarbonate substrate; the polycarbonate substrate comprises the following raw materials in percentage by mass:
35-40% of silicon-copolymerized PC plastic;
8-12% of acrylic;
4-8% of ASA resin;
3-7% of PCTG plastic;
2-5% of nano metal oxide;
0.05-0.1% of a coupling agent;
0.5-1.5% of epoxy resin;
0.2-0.6% of antioxidant;
0.1-0.4% of a lubricant;
0.3-0.7% of a dispersant;
0.3-0.7% of toner;
the balance being PC resin.
2. The polycarbonate material with high surface hardness according to claim 1, wherein the hardening coating comprises the following raw materials: the mass ratio of the methyltrimethoxysilane to the ethyl orthosilicate to the gamma-methacryloxypropyltrimethoxysilane is 1.8-2.4: 2.8-3.8: 1.
3. the polycarbonate material with high surface hardness as claimed in claim 1 or 2, wherein the silicon-copolymerized PC plastic comprises the following raw materials by mass percent: 96-98% of polycarbonate and 2-4% of eugenol silicone oil; the eugenol silicone oil comprises the following raw materials in percentage by mass: 88-92% of hydrogen-containing silicone oil, 7-11% of eugenol and 0.1-1% of chloroplatinic acid octyl alcohol solution; the mass fraction of chloroplatinic acid in the chloroplatinic acid octyl alcohol solution is 1-3%.
4. The polycarbonate material with high surface hardness as claimed in claim 1 or 2, wherein the nano metal oxide is selected from one or more of nano magnesium oxide, nano zirconium oxide and nano aluminum oxide; the crystal form of the nano aluminum oxide is preferably alpha type, and the particle size of the nano aluminum oxide is preferably 25-35 nm; the particle size of the nano zirconia is preferably 80-100 nm; the particle size of the nano magnesium oxide is preferably 40-70 nm.
5. The polycarbonate material with high surface hardness according to claim 1 or 2, wherein the acrylic is a cross-linked acrylic comprising the following raw materials in percentage by mass: methyl methacrylate, styrene, methacrylic acid, azobisisobutyronitrile, and divinylbenzene; the mass ratio of the five raw materials is 30-34: 19-23: 5-7: 0.1-0.3: 1.
6. the polycarbonate material with high surface hardness as claimed in claim 1 or 2, wherein the MFR value of the acrylic resin is preferably 10-13 g/10min, and the MFR value of the ASA resin is preferably 25-27 g/10 min.
7. The polycarbonate material with high surface hardness as claimed in claim 1 or 2, wherein the epoxy resin is preferably a DGEBA type epoxy resin, and the epoxy equivalent is preferably 190-200.
8. The polycarbonate material with high surface hardness according to claim 1 or 2, wherein the coupling agent is one or more selected from an aluminate coupling agent, a silane coupling agent Z-6030, and a phthalate coupling agent.
9. The method for preparing the polycarbonate material with high surface hardness according to any one of claims 2 to 8, comprising the following steps:
1) pretreatment: the coupling agent and the nano metal oxide are weighed according to the proportion and added into a high-speed mixer to be stirred at a high speed for 8-12 minutes for surface modification;
2) preparing a hardening coating: weighing methyl trimethoxy silane, ethyl orthosilicate and gamma-methacryloxypropyl trimethoxy silane according to the proportion, and adding deionized water and isopropanol; then adding hydrochloric acid to adjust the pH value of the system to 2, and stirring and mixing uniformly; standing for 1-3 hours, adding a curing agent accounting for 0.1-0.3% of the total mass of the raw materials and a flatting agent accounting for 0.5-2% of the total mass of the raw materials, and adding an organic solvent to adjust the solid content of the raw materials to 16-18% to obtain the hardening coating;
3) and (3) extrusion molding: adding PC resin, silicon-copolymerized PC plastic, acrylic, ASA resin, PCTG plastic, epoxy resin, an antioxidant, a lubricant, a dispersing agent, toner and the pretreated nano metal oxide into an extruder, mixing and granulating; extruding the materials from an extruder and then cutting the materials into particles to prepare polycarbonate modified plastics;
4) spraying: the polycarbonate modified plastic is prepared into a polycarbonate substrate, the polycarbonate substrate is soaked in a potassium dichromate solution for 4-6 minutes, and then is ultrasonically cleaned for 3-6 minutes by a sodium hydroxide solution to remove impurities on the surface of the polycarbonate substrate; immersing the pretreated polycarbonate substrate into the hardening coating, and uniformly lifting, wherein the lifting speed is 10-20 cm/min; pre-drying for 20-25 minutes at the temperature of 60-70 ℃, then heating to 115-125 ℃, heating and curing for 2-4 hours, and forming a hardening coating layer of 2-8 microns on the polycarbonate substrate to obtain the high-surface-hardness polycarbonate material.
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