CN118185448B - High-performance coating for sand paper and preparation method thereof - Google Patents
High-performance coating for sand paper and preparation method thereof Download PDFInfo
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- CN118185448B CN118185448B CN202410615286.8A CN202410615286A CN118185448B CN 118185448 B CN118185448 B CN 118185448B CN 202410615286 A CN202410615286 A CN 202410615286A CN 118185448 B CN118185448 B CN 118185448B
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- boron nitride
- hydroxyethyl cellulose
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- 238000000576 coating method Methods 0.000 title claims abstract description 112
- 239000011248 coating agent Substances 0.000 title claims abstract description 108
- 244000137852 Petrea volubilis Species 0.000 title claims abstract description 67
- 238000002360 preparation method Methods 0.000 title claims abstract description 38
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical class N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims abstract description 185
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims abstract description 167
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims abstract description 167
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims abstract description 167
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 123
- 239000002135 nanosheet Substances 0.000 claims abstract description 112
- 229910052751 metal Inorganic materials 0.000 claims abstract description 57
- 239000002184 metal Substances 0.000 claims abstract description 57
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 54
- -1 cyanate radical Chemical class 0.000 claims abstract description 17
- 238000003756 stirring Methods 0.000 claims description 103
- 238000000498 ball milling Methods 0.000 claims description 54
- 229920003009 polyurethane dispersion Polymers 0.000 claims description 53
- 239000011259 mixed solution Substances 0.000 claims description 52
- 239000002270 dispersing agent Substances 0.000 claims description 51
- 239000007788 liquid Substances 0.000 claims description 37
- 239000002518 antifoaming agent Substances 0.000 claims description 36
- 238000001035 drying Methods 0.000 claims description 34
- 238000000034 method Methods 0.000 claims description 32
- 230000008569 process Effects 0.000 claims description 28
- 235000021355 Stearic acid Nutrition 0.000 claims description 22
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 22
- 150000003839 salts Chemical class 0.000 claims description 22
- 239000008117 stearic acid Substances 0.000 claims description 22
- 239000007864 aqueous solution Substances 0.000 claims description 20
- 239000008367 deionised water Substances 0.000 claims description 18
- 229910021641 deionized water Inorganic materials 0.000 claims description 18
- 239000002994 raw material Substances 0.000 claims description 18
- 239000007787 solid Substances 0.000 claims description 18
- 238000007599 discharging Methods 0.000 claims description 17
- 239000000725 suspension Substances 0.000 claims description 17
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 17
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 14
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 14
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 12
- YDEXUEFDPVHGHE-GGMCWBHBSA-L disodium;(2r)-3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Na+].[Na+].COC1=CC=CC(C[C@H](CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O YDEXUEFDPVHGHE-GGMCWBHBSA-L 0.000 claims description 12
- HQYALQRYBUJWDH-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical compound CCC[Si](OC)(OC)OC HQYALQRYBUJWDH-UHFFFAOYSA-N 0.000 claims description 12
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 claims description 10
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 8
- 229920001451 polypropylene glycol Polymers 0.000 claims description 7
- 229920005614 potassium polyacrylate Polymers 0.000 claims description 7
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 6
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 5
- 239000008116 calcium stearate Substances 0.000 claims description 5
- 235000013539 calcium stearate Nutrition 0.000 claims description 5
- 235000019359 magnesium stearate Nutrition 0.000 claims description 5
- INJVFBCDVXYHGQ-UHFFFAOYSA-N n'-(3-triethoxysilylpropyl)ethane-1,2-diamine Chemical compound CCO[Si](OCC)(OCC)CCCNCCN INJVFBCDVXYHGQ-UHFFFAOYSA-N 0.000 claims description 4
- PHQOGHDTIVQXHL-UHFFFAOYSA-N n'-(3-trimethoxysilylpropyl)ethane-1,2-diamine Chemical compound CO[Si](OC)(OC)CCCNCCN PHQOGHDTIVQXHL-UHFFFAOYSA-N 0.000 claims description 4
- DRRZZMBHJXLZRS-UHFFFAOYSA-N n-[3-[dimethoxy(methyl)silyl]propyl]cyclohexanamine Chemical compound CO[Si](C)(OC)CCCNC1CCCCC1 DRRZZMBHJXLZRS-UHFFFAOYSA-N 0.000 claims description 4
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 3
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 2
- AGXUVMPSUKZYDT-UHFFFAOYSA-L barium(2+);octadecanoate Chemical compound [Ba+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O AGXUVMPSUKZYDT-UHFFFAOYSA-L 0.000 claims description 2
- UJTGYJODGVUOGO-UHFFFAOYSA-N diethoxy-methyl-propylsilane Chemical compound CCC[Si](C)(OCC)OCC UJTGYJODGVUOGO-UHFFFAOYSA-N 0.000 claims description 2
- RBNPOMFGQQGHHO-UHFFFAOYSA-N glyceric acid Chemical compound OCC(O)C(O)=O RBNPOMFGQQGHHO-UHFFFAOYSA-N 0.000 claims description 2
- MQWFLKHKWJMCEN-UHFFFAOYSA-N n'-[3-[dimethoxy(methyl)silyl]propyl]ethane-1,2-diamine Chemical compound CO[Si](C)(OC)CCCNCCN MQWFLKHKWJMCEN-UHFFFAOYSA-N 0.000 claims description 2
- NBXZNTLFQLUFES-UHFFFAOYSA-N triethoxy(propyl)silane Chemical compound CCC[Si](OCC)(OCC)OCC NBXZNTLFQLUFES-UHFFFAOYSA-N 0.000 claims description 2
- 229920002635 polyurethane Polymers 0.000 abstract description 19
- 239000004814 polyurethane Substances 0.000 abstract description 19
- 239000002904 solvent Substances 0.000 abstract description 7
- 239000000853 adhesive Substances 0.000 abstract description 6
- 230000001070 adhesive effect Effects 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 6
- 239000003795 chemical substances by application Substances 0.000 abstract description 5
- 239000011347 resin Substances 0.000 abstract description 4
- 229920005989 resin Polymers 0.000 abstract description 4
- MDFFNEOEWAXZRQ-UHFFFAOYSA-N aminyl Chemical compound [NH2] MDFFNEOEWAXZRQ-UHFFFAOYSA-N 0.000 abstract 2
- 229910052582 BN Inorganic materials 0.000 description 24
- 239000013530 defoamer Substances 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 14
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 13
- 238000001238 wet grinding Methods 0.000 description 10
- 239000007822 coupling agent Substances 0.000 description 7
- 125000003277 amino group Chemical group 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical group [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 5
- 239000003082 abrasive agent Substances 0.000 description 4
- 230000002776 aggregation Effects 0.000 description 4
- 238000001723 curing Methods 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 description 4
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- XLJMAIOERFSOGZ-UHFFFAOYSA-M cyanate group Chemical group [O-]C#N XLJMAIOERFSOGZ-UHFFFAOYSA-M 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000012855 volatile organic compound Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000002064 nanoplatelet Substances 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical group CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 1
- JVYDLYGCSIHCMR-UHFFFAOYSA-N 2,2-bis(hydroxymethyl)butanoic acid Chemical compound CCC(CO)(CO)C(O)=O JVYDLYGCSIHCMR-UHFFFAOYSA-N 0.000 description 1
- 239000004970 Chain extender Substances 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000005058 Isophorone diisocyanate Substances 0.000 description 1
- 229920001730 Moisture cure polyurethane Polymers 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000002313 adhesive film Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000012975 dibutyltin dilaurate Substances 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- YLBPOJLDZXHVRR-UHFFFAOYSA-N n'-[3-[diethoxy(methyl)silyl]propyl]ethane-1,2-diamine Chemical group CCO[Si](C)(OCC)CCCNCCN YLBPOJLDZXHVRR-UHFFFAOYSA-N 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 229920000909 polytetrahydrofuran Polymers 0.000 description 1
- 239000011527 polyurethane coating Substances 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 125000000467 secondary amino group Chemical group [H]N([*:1])[*:2] 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 125000001302 tertiary amino group Chemical group 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
Classifications
-
- 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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
-
- 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
- C09D7/20—Diluents or solvents
-
- 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
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- 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
- C08K3/38—Boron-containing compounds
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a coating for high-performance sand paper and a preparation method thereof, and belongs to the technical field of coatings. The invention uses the aqueous polyurethane as coating bonding resin and water as solvent, which is environment-friendly and has strong adhesive force; the addition of the metal stearate can improve the friction stability; the hydroxyethyl cellulose modified boron nitride nano-sheet prepared by adopting the hydroxyethyl cellulose with good water solubility as the stripping agent can form a chemical bond with the cyanate radical, the amino radical and the amino radical on the polyamino silane coupling agent remained in the aqueous polyurethane, so that the coating forms a compact network structure, the compactness and the water resistance of the coating are improved, the cohesive force of the film layer and the binding force between the abrasive are enhanced, and the product prepared by the sand paper coating has excellent wear resistance and anti-blocking performance.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a high-performance coating for sand paper and a preparation method thereof.
Background
Sandpaper, a necessary grinding tool in the machining industry, has a trend of increasing year by year with the development of the machining industry, the construction industry level and the industrial technology level. The raw materials for producing the sand paper comprise sand grains, rubberized fabric, paint and the like, and the production process steps of the sand paper can be divided into the process steps of uncoiling grey cloth, gluing, sand planting, laminating, curing, coating and the like.
The existing sand paper is generally unfavorable for chip removal, has low heat dissipation performance, is easy to fall off and the like, and seriously influences the grinding efficiency and the service life of the sand paper. In order to solve the technical problem, the prior art mostly carries out modification treatment on the coating. However, the prior art is mostly improved on the basis of solvent-type coating, and because the solvent-type coating uses an organic solvent as a dispersion medium, a large amount of Volatile Organic Compounds (VOCs) can be generated in the use process, the ecological environment is destroyed, and the solvent-type coating has great potential safety hazards from the aspects of human health, environmental protection and the like. In order to respond to the national and social demands for environmental protection, researchers have abandoned traditional solvent-borne coatings and focused on developing novel, environmentally-friendly, nontoxic and harmless aqueous coating materials. Among them, the application of aqueous polyurethane coating to sand paper has received a great deal of attention. Unlike traditional solvent polyurethane, the aqueous polyurethane system has no organic solvent, is nontoxic and does not pollute the environment, so that the emission of VOCs is effectively reduced in the use process, and the environment-friendly requirement is met. Meanwhile, the waterborne polyurethane not only inherits the excellent mechanical properties of the solvent polyurethane, but also has the advantages of low price, easy transportation and storage, good low-temperature film forming property, relatively convenient use, low temperature resistance, good wear resistance, good adhesive force and the like. However, since the main chain of the aqueous polyurethane molecule contains hydrophilic groups, the formed adhesive film has higher surface free energy, and thus, poor water resistance is shown, and the binding force between the sand paper coating and the abrasive is poor. In the use especially wet grinding environment, abrasive material drops easily, and the inhomogeneous is polished, and the heat that friction produced still can lead to the chip removal ability of abrasive paper to worsen, produces abrasive paper jam phenomenon, influences abrasive paper's grinding efficiency and life-span.
Disclosure of Invention
In order to solve the technical problems, the invention provides the coating for the high-performance sand paper and the preparation method thereof, and the coating solves the technical problems of low adhesive force, easy blockage and poor water resistance in the wet grinding process of the sand paper.
The aim of the invention is achieved by the following technical scheme.
In a first aspect, the invention provides a coating for high-performance sand paper, which comprises the following raw materials in parts by weight:
30-50 parts of stearic acid metal salt,
20-30 Parts of aqueous polyurethane dispersion,
2-10 Parts of hydroxyethyl cellulose modified boron nitride nano-sheet,
1-2 Parts of polyamino silane coupling agent,
0.1 To 2 parts of dispersing agent,
0.1-2 Parts of defoaming agent,
40-70 Parts of water;
Wherein, the hydroxyethyl cellulose modified boron nitride nano-sheet is prepared by ball milling and drying hexagonal boron nitride powder and hydroxyethyl cellulose in aqueous solution, and specific reference can be made to CN117304535A, CN113416334A and other patents; the sum of the mass of the hexagonal boron nitride powder and the mass of the hydroxyethyl cellulose is the mass of the hydroxyethyl cellulose modified boron nitride nano-sheet, and the mass ratio of the hexagonal boron nitride powder to the hydroxyethyl cellulose is 1: (1-1.2); further, the hydroxyethyl cellulose modified boron nitride nano-sheet is 5-6 parts.
Boron nitride has good wear resistance and heat conduction. However, the prior art generally adds boron nitride powder directly. The boron nitride powder is in a granular structure, and when the addition amount is small, a continuous structure is difficult to form, and the improvement of the wear resistance and the thermal conductivity is limited; when the amount of the additive is large, there is a technical problem that agglomeration and precipitation are easy. The boron nitride nano sheet has a lamellar structure, and a continuous structure can be formed by adding a small amount of boron nitride nano sheet, so that the mechanical property and the wear resistance of the coating are improved, the heat conductivity coefficient can be improved, heat aggregation is prevented, the adhesive force of the coating is reduced, and the phenomena of peeling and falling occur. The boron nitride nano-sheet adopts hydroxyethyl cellulose with good water solubility as a stripping agent, and has better performance compared with the common stripping technologies of high-pressure homogenization, alkali liquor treatment and the like in the prior art. Firstly, hydroxyethyl cellulose has a plurality of oxygen-containing functional groups, and in the ball milling process, the hydroxyethyl cellulose not only can play a role in assisting in stripping, but also can prevent the nano-sheets from being broken; under the action of high pressure of ball milling, the nano-boron nitride powder can form hydrogen bond with the nano-boron nitride sheet, so that the dispersion performance of the nano-boron nitride sheet in aqueous solution is improved, the agglomeration of the nano-boron nitride sheet is prevented, and the heat conduction performance and the wear resistance of the coating are improved. In addition, the hydroxyethyl cellulose is used as a common thickener, and can also form a chemical bond with the cyanate group and the amino group remained in the aqueous polyurethane and the amino group on the polyamino silane coupling agent, and the hydroxyethyl cellulose and the polyamino silane coupling agent both play a role in cross-linking and curing with the aqueous polyurethane, so that the coating forms a compact network structure, the compactness and the water resistance of the coating are improved, and the influence of moisture on the coating in the wet grinding process is reduced.
The invention uses the aqueous polyurethane as the coating matrix resin and uses the water as the solvent, so that the invention has the advantages of no pollution, environmental friendliness, excellent mechanical property, good compatibility and strong adhesive force; hybridized with the boron nitride nanosheets to form a firm hierarchical nanostructure; the coating has good durability after abrasion.
The stearic acid metal salt is not only a common lubricant in the field, but also has the functions of improving the dispersibility of each substance of the coating and inhibiting precipitation of small molecular components; in addition, the stearic acid metal salt has good heat absorption capacity, and the stearic acid metal salt can be used together with the boron nitride nanosheets to improve the stability of the abrasive paper in the wet grinding process and prevent heat aggregation.
Primary amino, secondary amino and tertiary amino in the polyamino silane coupling agent can react with active functional groups on the waterborne polyurethane and the hydroxyethyl cellulose to play a role in crosslinking and curing, so that the wear resistance and the water resistance of the coating are improved; meanwhile, the silicon-containing groups in the polyamino silane coupling agent can react with the hydroxyl groups on the surface of the boron nitride nanosheets to play a role of the coupling agent, so that the dispersion performance of the boron nitride nanosheets is further improved.
The metal stearate is selected from one or more of zinc stearate, calcium stearate, magnesium stearate and barium stearate.
The solid content of the aqueous polyurethane dispersion liquid is 40-50wt%; the type of the aqueous polyurethane is not particularly limited, and the aqueous polyurethane can be prepared by reacting polyisocyanate substances with dihydric alcohol, adding a hydrophilic chain extender, and uniformly dispersing the mixture.
The preparation process of the hydroxyethyl cellulose modified boron nitride nanosheets comprises the following steps: dissolving hydroxyethyl cellulose in deionized water, adding hexagonal boron nitride powder, ball milling to obtain hydroxyethyl cellulose modified boron nitride nanosheet suspension, and drying to obtain the hydroxyethyl cellulose modified boron nitride nanosheets.
The ball milling process is to ball mill for 10-14h at 400-600 rpm.
The polyamino silane coupling agent is selected from one or more of 3-diethylenetriamine propyl trimethoxy silane, 3-diethylenetriamine propyl triethoxy silane, 3-diethylenetriamine propyl methyl dimethoxy silane, 3-diethylenetriamine propyl methyl diethoxy silane, N- (2-aminoethyl) -3-aminopropyl methyl dimethoxy silane, N-2-aminoethyl-3-aminopropyl triethoxy silane and N-2-aminoethyl-3-aminopropyl trimethoxy silane.
The dispersing agent is one or more selected from sodium lignin sulfonate, sodium fatty alcohol polyoxyethylene ether sulfate, sodium polyacrylate and potassium polyacrylate.
The defoaming agent is one or more selected from polydimethylsiloxane, glycerol polyoxypropylene ether and polyoxypropylene polyoxyethylene glycerol ether.
In a second aspect of the present invention, there is provided a method for preparing a coating for high performance coated abrasive, comprising the steps of:
(1) Dividing water into two parts, adding aqueous polyurethane dispersion liquid into a first part of water, then adding metal stearate, a dispersing agent and a defoaming agent, and fully stirring to obtain a first mixed liquid;
(2) Adding hydroxyethyl cellulose modified boron nitride nano-sheet and polyamino silane coupling agent into the second part of water, and fully stirring to obtain a second mixed solution;
(3) And adding the second mixed solution into the first mixed solution, fully stirring, standing, and discharging to obtain the coating for the high-performance sand paper.
In the step (1), water is divided into two equal parts, and the stirring speed is 500-600r/min; in the step (2), the stirring speed is 600-800r/min; in the step (3), the stirring speed is 500-700r/min.
Compared with the prior art, the invention has the following beneficial effects: the coating for the sand paper solves the technical problems of low adhesive force, easy blockage and no water resistance in the wet grinding process of the sand paper. The aqueous polyurethane is used as coating matrix resin, and water is used as solvent, so that the coating is pollution-free and environment-friendly. The boron nitride nano-sheet improves the mechanical property, the wear resistance and the heat conductivity coefficient of the coating. The hydroxyethyl cellulose with good water solubility is used as the stripping agent, so that the stripping agent not only can play a role in assisting stripping, but also can prevent the nano-sheets from being broken; and the coating can form a hydrogen bond with the boron nitride nanosheets, so that the dispersion performance of the boron nitride nanosheets in the aqueous solution is improved, and the heat conduction performance and the wear resistance of the coating are improved. The hydroxyethyl cellulose can also form a chemical bond with the cyanate group, the amino group and the amino group on the polyamino silane coupling agent which are remained in the aqueous polyurethane, so that the coating forms a compact network structure, the compactness and the water resistance of the coating are improved, the influence of moisture on the coating in the wet milling process is reduced, and the coating still has good mechanical property and durability after being worn.
Drawings
Detailed Description
The following describes specific embodiments of the present invention in detail. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
The type of the aqueous polyurethane of the embodiment of the invention is the same as that of the aqueous polyurethane of the comparative example, and the preparation method is as follows: 45 parts by weight of dehydrated polytetramethylene ether glycol was added to a four-necked flask, stirring was started, nitrogen was introduced, and reflux was condensed. Then, 20 parts by weight of isophorone diisocyanate and 1.7 parts by weight of dibutyltin dilaurate were added to a four-necked flask, and the reaction was carried out at a constant temperature of 75℃for 1 hour. Adding an N, N-dimethylformamide solution dissolved with 5 parts by weight of dimethylolbutyric acid into a reaction system, continuously carrying out constant-temperature reaction for 1.5 hours, and cooling to 60 ℃. Then, 2.5 parts by weight of triethylamine was added dropwise to the reaction system, followed by neutralization and stabilization for 1 hour to give a polyurethane prepolymer. Pouring the prepolymer into a beaker while the prepolymer is hot, dripping a mixed solution of deionized water containing 1 part by weight of 1, 4-butanediol into the beaker for chain extension, simultaneously dispersing at a high speed for 1.5 hours, preparing aqueous polyurethane dispersion liquid, and obtaining the aqueous polyurethane dispersion liquid with different solid contents by adjusting the solvent content.
Example 1
The coating for the high-performance sand paper comprises the following raw materials in parts by weight:
40 parts of stearic acid metal salt,
25 Parts of aqueous polyurethane dispersion,
2 Parts of hydroxyethyl cellulose modified boron nitride nano-sheet,
1.5 Parts of polyamino silane coupling agent,
1 Part of dispersing agent,
1 Part of defoaming agent,
50 Parts of water;
Wherein, the hydroxyethyl cellulose modified boron nitride nano-sheet is prepared by ball milling and drying hexagonal boron nitride powder and hydroxyethyl cellulose in aqueous solution, the mass sum of the hexagonal boron nitride powder and the hydroxyethyl cellulose is 2 parts, and the mass ratio of the hexagonal boron nitride powder to the hydroxyethyl cellulose is 1:1.1. the specific preparation process comprises the following steps: dissolving hydroxyethyl cellulose in deionized water, adding hexagonal boron nitride powder, ball milling to obtain hydroxyethyl cellulose modified boron nitride nanosheet suspension, and drying to obtain the hydroxyethyl cellulose modified boron nitride nanosheets. The ball milling process is to ball mill for 12 hours at 550 rpm.
The metal stearate is selected from zinc stearate.
The aqueous polyurethane dispersion has a solids content of 45wt%.
The polyamino silane coupling agent is selected from 3-diethylenetriamine propyl trimethoxy silane.
The dispersing agent is selected from sodium lignin sulfonate.
The defoamer is selected from polydimethyl siloxane.
The preparation method of the coating for the high-performance sand paper comprises the following steps:
(1) Dividing water into two parts, adding aqueous polyurethane dispersion liquid into a first part of water, then adding metal stearate, a dispersing agent and a defoaming agent, and fully stirring to obtain a first mixed liquid;
(2) Adding hydroxyethyl cellulose modified boron nitride nano-sheet and polyamino silane coupling agent into the second part of water, and fully stirring to obtain a second mixed solution;
(3) And adding the second mixed solution into the first mixed solution, fully stirring, standing, and discharging to obtain the coating for the high-performance sand paper.
In the step (1), water is divided into two equal parts, and the stirring speed is 550r/min; in the step (2), the stirring speed is 680r/min; in the step (3), the stirring speed is 620r/min.
Example 2
The coating for the high-performance sand paper comprises the following raw materials in parts by weight:
40 parts of stearic acid metal salt,
25 Parts of aqueous polyurethane dispersion,
10 Parts of hydroxyethyl cellulose modified boron nitride nano-sheet,
1.5 Parts of polyamino silane coupling agent,
1 Part of dispersing agent,
1 Part of defoaming agent,
50 Parts of water;
Wherein, the hydroxyethyl cellulose modified boron nitride nano-sheet is prepared by ball milling and drying hexagonal boron nitride powder and hydroxyethyl cellulose in aqueous solution, the mass sum of the hexagonal boron nitride powder and the hydroxyethyl cellulose is 10 parts, and the mass ratio of the hexagonal boron nitride powder to the hydroxyethyl cellulose is 1:1.1. the specific preparation process comprises the following steps: dissolving hydroxyethyl cellulose in deionized water, adding hexagonal boron nitride powder, ball milling to obtain hydroxyethyl cellulose modified boron nitride nanosheet suspension, and drying to obtain the hydroxyethyl cellulose modified boron nitride nanosheets. The ball milling process is to ball mill for 12 hours at 550 rpm.
The metal stearate is selected from zinc stearate.
The aqueous polyurethane dispersion has a solids content of 45wt%.
The polyamino silane coupling agent is selected from 3-diethylenetriamine propyl trimethoxy silane.
The dispersing agent is selected from sodium lignin sulfonate.
The defoamer is selected from polydimethyl siloxane.
The preparation method of the coating for the high-performance sand paper comprises the following steps:
(1) Dividing water into two parts, adding aqueous polyurethane dispersion liquid into a first part of water, then adding metal stearate, a dispersing agent and a defoaming agent, and fully stirring to obtain a first mixed liquid;
(2) Adding hydroxyethyl cellulose modified boron nitride nano-sheet and polyamino silane coupling agent into the second part of water, and fully stirring to obtain a second mixed solution;
(3) And adding the second mixed solution into the first mixed solution, fully stirring, standing, and discharging to obtain the coating for the high-performance sand paper.
In the step (1), water is divided into two equal parts, and the stirring speed is 550r/min; in the step (2), the stirring speed is 680r/min; in the step (3), the stirring speed is 620r/min.
Example 3
The coating for the high-performance sand paper comprises the following raw materials in parts by weight:
47 parts of stearic acid metal salt,
29 Parts of aqueous polyurethane dispersion,
7 Parts of hydroxyethyl cellulose modified boron nitride nano-sheet,
1.1 Parts of polyamino silane coupling agent,
0.8 Part of dispersing agent,
1.1 Parts of defoaming agent,
48 Parts of water;
Wherein, the hydroxyethyl cellulose modified boron nitride nano-sheet is prepared by ball milling and drying hexagonal boron nitride powder and hydroxyethyl cellulose in aqueous solution, the mass sum of the hexagonal boron nitride powder and the hydroxyethyl cellulose is 7 parts, and the mass ratio of the hexagonal boron nitride powder to the hydroxyethyl cellulose is 1:1.15. the specific preparation process comprises the following steps: dissolving hydroxyethyl cellulose in deionized water, adding hexagonal boron nitride powder, ball milling to obtain hydroxyethyl cellulose modified boron nitride nanosheet suspension, and drying to obtain the hydroxyethyl cellulose modified boron nitride nanosheets. The ball milling process is to ball mill for 13 hours at 560 rpm.
The metal stearate is zinc stearate and magnesium stearate, and the mass ratio of the zinc stearate to the magnesium stearate is 1:1.
The aqueous polyurethane dispersion has a solids content of 43wt%.
The polyamino silane coupling agent is 3-diethylenetriamine propyl trimethoxy silane and N-2-aminoethyl-3-aminopropyl trimethoxy silane, and the mass ratio of the two is 1:1.
The dispersing agent is sodium polyacrylate and potassium polyacrylate, and the mass ratio of the sodium polyacrylate to the potassium polyacrylate is 1:1.
The defoamer is selected from polydimethyl siloxane.
The preparation method of the coating for the high-performance sand paper comprises the following steps:
(1) Dividing water into two parts, adding aqueous polyurethane dispersion liquid into a first part of water, then adding metal stearate, a dispersing agent and a defoaming agent, and fully stirring to obtain a first mixed liquid;
(2) Adding hydroxyethyl cellulose modified boron nitride nano-sheet and polyamino silane coupling agent into the second part of water, and fully stirring to obtain a second mixed solution;
(3) And adding the second mixed solution into the first mixed solution, fully stirring, standing, and discharging to obtain the coating for the high-performance sand paper.
In the step (1), water is divided into two equal parts, and the stirring speed is 600r/min; in the step (2), the stirring speed is 600r/min; in the step (3), the stirring speed is 700r/min.
Example 4
The coating for the high-performance sand paper comprises the following raw materials in parts by weight:
35 parts of stearic acid metal salt,
22 Parts of aqueous polyurethane dispersion,
5 Parts of hydroxyethyl cellulose modified boron nitride nano-sheet,
1.8 Parts of polyamino silane coupling agent,
1.2 Parts of dispersing agent,
1.6 Parts of defoaming agent,
62 Parts of water;
Wherein, the hydroxyethyl cellulose modified boron nitride nano-sheet is prepared by ball milling and drying hexagonal boron nitride powder and hydroxyethyl cellulose in aqueous solution, the mass sum of the hexagonal boron nitride powder and the hydroxyethyl cellulose is 5 parts, and the mass ratio of the hexagonal boron nitride powder to the hydroxyethyl cellulose is 1:1.05. the specific preparation process comprises the following steps: dissolving hydroxyethyl cellulose in deionized water, adding hexagonal boron nitride powder, ball milling to obtain hydroxyethyl cellulose modified boron nitride nanosheet suspension, and drying to obtain the hydroxyethyl cellulose modified boron nitride nanosheets. The ball milling process is to ball mill for 10 hours at 480 rpm.
The metal stearate is selected from zinc stearate.
The aqueous polyurethane dispersion had a solids content of 48% by weight.
The polyamino silane coupling agent is 3-diethylenetriamine propyl methyl dimethoxy silane and N-2-aminoethyl-3-aminopropyl trimethoxy silane, and the mass ratio of the two is 1:1.
The dispersing agent is sodium polyacrylate and potassium polyacrylate, and the mass ratio of the sodium polyacrylate to the potassium polyacrylate is 1:1.
The defoamer is selected from polydimethyl siloxane.
The preparation method of the coating for the high-performance sand paper comprises the following steps:
(1) Dividing water into two parts, adding aqueous polyurethane dispersion liquid into a first part of water, then adding metal stearate, a dispersing agent and a defoaming agent, and fully stirring to obtain a first mixed liquid;
(2) Adding hydroxyethyl cellulose modified boron nitride nano-sheet and polyamino silane coupling agent into the second part of water, and fully stirring to obtain a second mixed solution;
(3) And adding the second mixed solution into the first mixed solution, fully stirring, standing, and discharging to obtain the coating for the high-performance sand paper.
In the step (1), water is divided into two equal parts, and the stirring speed is 600r/min; in the step (2), the stirring speed is 600r/min; in the step (3), the stirring speed is 700r/min.
Example 5
The coating for the high-performance sand paper comprises the following raw materials in parts by weight:
50 parts of stearic acid metal salt,
20 Parts of aqueous polyurethane dispersion,
8 Parts of hydroxyethyl cellulose modified boron nitride nano-sheet,
2 Parts of polyamino silane coupling agent,
2 Parts of dispersing agent,
1.5 Parts of defoaming agent,
65 Parts of water;
Wherein, the hydroxyethyl cellulose modified boron nitride nano-sheet is prepared by ball milling and drying hexagonal boron nitride powder and hydroxyethyl cellulose in aqueous solution, the mass sum of the hexagonal boron nitride powder and the hydroxyethyl cellulose is 8 parts, and the mass ratio of the hexagonal boron nitride powder to the hydroxyethyl cellulose is 1:1.1. the specific preparation process comprises the following steps: dissolving hydroxyethyl cellulose in deionized water, adding hexagonal boron nitride powder, ball milling to obtain hydroxyethyl cellulose modified boron nitride nanosheet suspension, and drying to obtain the hydroxyethyl cellulose modified boron nitride nanosheets. The ball milling process is to ball mill for 13h at 550 rpm.
The metal stearate is zinc stearate and calcium stearate, and the weight ratio of the zinc stearate to the calcium stearate is 1:1.
The aqueous polyurethane dispersion had a solids content of 44% by weight.
The polyamino silane coupling agent is two of 3-diethylenetriamine propyl trimethoxy silane and N-2-aminoethyl-3-aminopropyl triethoxy silane, and the weight ratio of the two is 1:1.
The dispersing agent is selected from sodium lignin sulfonate.
The defoamer is selected from glycerol polyoxypropylene ether.
The preparation method of the coating for the high-performance sand paper comprises the following steps:
(1) Dividing water into two parts, adding aqueous polyurethane dispersion liquid into a first part of water, then adding metal stearate, a dispersing agent and a defoaming agent, and fully stirring to obtain a first mixed liquid;
(2) Adding hydroxyethyl cellulose modified boron nitride nano-sheet and polyamino silane coupling agent into the second part of water, and fully stirring to obtain a second mixed solution;
(3) And adding the second mixed solution into the first mixed solution, fully stirring, standing, and discharging to obtain the coating for the high-performance sand paper.
In the step (1), the water is divided into two equal parts, and the stirring speed is 580r/min; the stirring speed in the step (2) is 740r/min; the stirring speed in the step (3) is 610r/min.
Example 6
The coating for the high-performance sand paper comprises the following raw materials in parts by weight:
30 parts of stearic acid metal salt,
30 Parts of aqueous polyurethane dispersion,
4 Parts of hydroxyethyl cellulose modified boron nitride nano-sheet,
1 Part of polyamino silane coupling agent,
0.4 Part of dispersing agent,
0.4 Part of defoaming agent,
55 Parts of water;
Wherein, the hydroxyethyl cellulose modified boron nitride nano-sheet is prepared by ball milling and drying hexagonal boron nitride powder and hydroxyethyl cellulose in aqueous solution, the mass sum of the hexagonal boron nitride powder and the hydroxyethyl cellulose is 4 parts, and the mass ratio of the hexagonal boron nitride powder to the hydroxyethyl cellulose is 1:1.12. the specific preparation process comprises the following steps: dissolving hydroxyethyl cellulose in deionized water, adding hexagonal boron nitride powder, ball milling to obtain hydroxyethyl cellulose modified boron nitride nanosheet suspension, and drying to obtain the hydroxyethyl cellulose modified boron nitride nanosheets. The ball milling process is to ball mill for 13 hours at 500 rpm.
The metal stearate is selected from zinc stearate.
The aqueous polyurethane dispersion has a solids content of 47wt%.
The polyaminosilane coupling agent is selected from N-2-aminoethyl-3-aminopropyl triethoxysilane.
The dispersant is selected from potassium polyacrylate.
The defoamer is selected from polyoxypropylene polyoxyethylene glyceryl ether.
The preparation method of the coating for the high-performance sand paper comprises the following steps:
(1) Dividing water into two parts, adding aqueous polyurethane dispersion liquid into a first part of water, then adding metal stearate, a dispersing agent and a defoaming agent, and fully stirring to obtain a first mixed liquid;
(2) Adding hydroxyethyl cellulose modified boron nitride nano-sheet and polyamino silane coupling agent into the second part of water, and fully stirring to obtain a second mixed solution;
(3) And adding the second mixed solution into the first mixed solution, fully stirring, standing, and discharging to obtain the coating for the high-performance sand paper.
In the step (1), the water is divided into two equal parts, and the stirring speed is 580r/min; in the step (2), the stirring speed is 660r/min; in the step (3), the stirring speed is 620r/min.
Example 7
The coating for the high-performance sand paper comprises the following raw materials in parts by weight:
50 parts of stearic acid metal salt,
30 Parts of aqueous polyurethane dispersion,
8 Parts of hydroxyethyl cellulose modified boron nitride nano-sheet,
2 Parts of polyamino silane coupling agent,
2 Parts of dispersing agent,
2 Parts of defoaming agent,
70 Parts of water;
Wherein, the hydroxyethyl cellulose modified boron nitride nano-sheet is prepared by ball milling and drying hexagonal boron nitride powder and hydroxyethyl cellulose in aqueous solution, the mass sum of the hexagonal boron nitride powder and the hydroxyethyl cellulose is 8 parts, and the mass ratio of the hexagonal boron nitride powder to the hydroxyethyl cellulose is 1:1.2. the specific preparation process comprises the following steps: dissolving hydroxyethyl cellulose in deionized water, adding hexagonal boron nitride powder, ball milling to obtain hydroxyethyl cellulose modified boron nitride nanosheet suspension, and drying to obtain the hydroxyethyl cellulose modified boron nitride nanosheets. The ball milling process is to ball mill for 14h at 600 rpm.
The metal stearate is selected from magnesium stearate.
The aqueous polyurethane dispersion has a solids content of 50wt%.
The polyaminosilane coupling agent is selected from N- (2-aminoethyl) -3-aminopropyl methyl diethoxy silane.
The dispersant is selected from sodium polyacrylate salts.
The defoamer is selected from polydimethyl siloxane.
The preparation method of the coating for the high-performance sand paper comprises the following steps:
(1) Dividing water into two parts, adding aqueous polyurethane dispersion liquid into a first part of water, then adding metal stearate, a dispersing agent and a defoaming agent, and fully stirring to obtain a first mixed liquid;
(2) Adding hydroxyethyl cellulose modified boron nitride nano-sheet and polyamino silane coupling agent into the second part of water, and fully stirring to obtain a second mixed solution;
(3) And adding the second mixed solution into the first mixed solution, fully stirring, standing, and discharging to obtain the coating for the high-performance sand paper.
In the step (1), water is divided into two equal parts, and the stirring speed is 600r/min; in the step (2), the stirring speed is 780r/min; in the step (3), the stirring speed is 600r/min.
Example 8
The coating for the high-performance sand paper comprises the following raw materials in parts by weight:
30 parts of stearic acid metal salt,
20 Parts of aqueous polyurethane dispersion,
4 Parts of hydroxyethyl cellulose modified boron nitride nano-sheet,
1 Part of polyamino silane coupling agent,
0.1 Part of dispersant,
0.1 Part of defoaming agent,
40 Parts of water;
wherein, the hydroxyethyl cellulose modified boron nitride nano-sheet is prepared by ball milling and drying hexagonal boron nitride powder and hydroxyethyl cellulose in aqueous solution, the mass sum of the hexagonal boron nitride powder and the hydroxyethyl cellulose is 4 parts, and the mass ratio of the hexagonal boron nitride powder to the hydroxyethyl cellulose is 1:1. the specific preparation process comprises the following steps: dissolving hydroxyethyl cellulose in deionized water, adding hexagonal boron nitride powder, ball milling to obtain hydroxyethyl cellulose modified boron nitride nanosheet suspension, and drying to obtain the hydroxyethyl cellulose modified boron nitride nanosheets. The ball milling process is to ball mill for 11 hours at 420 rpm.
The metal stearate is selected from calcium stearate.
The aqueous polyurethane dispersion has a solids content of 40wt%.
The polyamino silane coupling agent is selected from 3-diethylenetriamine propyl methyl dimethoxy silane.
The dispersing agent is selected from sodium fatty alcohol polyoxyethylene ether sulfate.
The defoamer is selected from glycerol polyoxypropylene ether.
The preparation method of the coating for the high-performance sand paper comprises the following steps:
(1) Dividing water into two parts, adding aqueous polyurethane dispersion liquid into a first part of water, then adding metal stearate, a dispersing agent and a defoaming agent, and fully stirring to obtain a first mixed liquid;
(2) Adding hydroxyethyl cellulose modified boron nitride nano-sheet and polyamino silane coupling agent into the second part of water, and fully stirring to obtain a second mixed solution;
(3) And adding the second mixed solution into the first mixed solution, fully stirring, standing, and discharging to obtain the coating for the high-performance sand paper.
In the step (1), water is divided into two equal parts, and the stirring speed is 510r/min; in the step (2), the stirring speed is 630r/min; in the step (3), the stirring speed is 580r/min.
Example 9
The coating for the high-performance sand paper comprises the following raw materials in parts by weight:
40 parts of stearic acid metal salt,
25 Parts of aqueous polyurethane dispersion,
6 Parts of hydroxyethyl cellulose modified boron nitride nano-sheet,
1.5 Parts of polyamino silane coupling agent,
1 Part of dispersing agent,
1 Part of defoaming agent,
50 Parts of water;
Wherein, the hydroxyethyl cellulose modified boron nitride nano-sheet is prepared by ball milling and drying hexagonal boron nitride powder and hydroxyethyl cellulose in aqueous solution, the mass sum of the hexagonal boron nitride powder and the hydroxyethyl cellulose is 6 parts, and the mass ratio of the hexagonal boron nitride powder to the hydroxyethyl cellulose is 1:1.1. the specific preparation process comprises the following steps: dissolving hydroxyethyl cellulose in deionized water, adding hexagonal boron nitride powder, ball milling to obtain hydroxyethyl cellulose modified boron nitride nanosheet suspension, and drying to obtain the hydroxyethyl cellulose modified boron nitride nanosheets. The ball milling process is to ball mill for 12 hours at 550 rpm.
The metal stearate is selected from zinc stearate.
The aqueous polyurethane dispersion has a solids content of 45wt%.
The polyamino silane coupling agent is selected from 3-diethylenetriamine propyl trimethoxy silane.
The dispersing agent is selected from sodium lignin sulfonate.
The defoamer is selected from polydimethyl siloxane.
The preparation method of the coating for the high-performance sand paper comprises the following steps:
(1) Dividing water into two parts, adding aqueous polyurethane dispersion liquid into a first part of water, then adding metal stearate, a dispersing agent and a defoaming agent, and fully stirring to obtain a first mixed liquid;
(2) Adding hydroxyethyl cellulose modified boron nitride nano-sheet and polyamino silane coupling agent into the second part of water, and fully stirring to obtain a second mixed solution;
(3) And adding the second mixed solution into the first mixed solution, fully stirring, standing, and discharging to obtain the coating for the high-performance sand paper.
In the step (1), water is divided into two equal parts, and the stirring speed is 550r/min; in the step (2), the stirring speed is 680r/min; in the step (3), the stirring speed is 620r/min.
Comparative example 1
The coating for the high-performance sand paper comprises the following raw materials in parts by weight:
40 parts of stearic acid metal salt,
25 Parts of aqueous polyurethane dispersion,
6 Parts of boron nitride nano-sheet,
1.5 Parts of polyamino silane coupling agent,
1 Part of dispersing agent,
1 Part of defoaming agent,
50 Parts of water;
The boron nitride nanosheets are prepared by ball milling and drying hexagonal boron nitride powder in an aqueous solution, wherein the mass of the hexagonal boron nitride powder is 6 parts. The specific preparation process comprises the following steps: adding hexagonal boron nitride powder into deionized water, ball milling to obtain boron nitride nanosheet suspension, and drying to obtain the boron nitride nanosheets. The ball milling process is to ball mill for 12 hours at 550 rpm.
The metal stearate is selected from zinc stearate.
The aqueous polyurethane dispersion has a solids content of 45wt%.
The polyamino silane coupling agent is selected from 3-diethylenetriamine propyl trimethoxy silane.
The dispersing agent is selected from sodium lignin sulfonate.
The defoamer is selected from polydimethyl siloxane.
The preparation method of the coating for the high-performance sand paper comprises the following steps:
(1) Dividing water into two parts, adding aqueous polyurethane dispersion liquid into a first part of water, then adding metal stearate, a dispersing agent and a defoaming agent, and fully stirring to obtain a first mixed liquid;
(2) Adding the boron nitride nano-sheet and the polyamino silane coupling agent into the second part of water, and fully stirring to obtain a second mixed solution;
(3) And adding the second mixed solution into the first mixed solution, fully stirring, standing, and discharging to obtain the coating for the high-performance sand paper.
In the step (1), water is divided into two equal parts, and the stirring speed is 550r/min; in the step (2), the stirring speed is 680r/min; in the step (3), the stirring speed is 620r/min.
Comparative example 2
The coating for the high-performance sand paper comprises the following raw materials in parts by weight:
40 parts of stearic acid metal salt,
25 Parts of aqueous polyurethane dispersion,
6 Parts of hydroxyethyl cellulose modified boron nitride nano-sheet,
1.5 Parts of polyamino silane coupling agent,
1 Part of dispersing agent,
1 Part of defoaming agent,
50 Parts of water;
Wherein, the hydroxyethyl cellulose modified boron nitride nano-sheet is prepared by ball milling and drying hexagonal boron nitride powder and hydroxyethyl cellulose in aqueous solution, the mass sum of the hexagonal boron nitride powder and the hydroxyethyl cellulose is 6 parts, and the mass ratio of the hexagonal boron nitride powder to the hydroxyethyl cellulose is 1:0.7. the specific preparation process comprises the following steps: dissolving hydroxyethyl cellulose in deionized water, adding hexagonal boron nitride powder, ball milling to obtain hydroxyethyl cellulose modified boron nitride nanosheet suspension, and drying to obtain the hydroxyethyl cellulose modified boron nitride nanosheets. The ball milling process is to ball mill for 12 hours at 550 rpm.
The metal stearate is selected from zinc stearate.
The aqueous polyurethane dispersion has a solids content of 45wt%.
The polyamino silane coupling agent is selected from 3-diethylenetriamine propyl trimethoxy silane.
The dispersing agent is selected from sodium lignin sulfonate.
The defoamer is selected from polydimethyl siloxane.
The preparation method of the coating for the high-performance sand paper comprises the following steps:
(1) Dividing water into two parts, adding aqueous polyurethane dispersion liquid into a first part of water, then adding metal stearate, a dispersing agent and a defoaming agent, and fully stirring to obtain a first mixed liquid;
(2) Adding hydroxyethyl cellulose modified boron nitride nano-sheet and polyamino silane coupling agent into the second part of water, and fully stirring to obtain a second mixed solution;
(3) And adding the second mixed solution into the first mixed solution, fully stirring, standing, and discharging to obtain the coating for the high-performance sand paper.
In the step (1), water is divided into two equal parts, and the stirring speed is 550r/min; in the step (2), the stirring speed is 680r/min; in the step (3), the stirring speed is 620r/min.
Comparative example 3
The coating for the high-performance sand paper comprises the following raw materials in parts by weight:
40 parts of stearic acid metal salt,
25 Parts of aqueous polyurethane dispersion,
6 Parts of hydroxyethyl cellulose modified boron nitride nano-sheet,
1.5 Parts of polyamino silane coupling agent,
1 Part of dispersing agent,
1 Part of defoaming agent,
50 Parts of water;
Wherein, the hydroxyethyl cellulose modified boron nitride nano-sheet is prepared by ball milling and drying hexagonal boron nitride powder and hydroxyethyl cellulose in aqueous solution, the mass sum of the hexagonal boron nitride powder and the hydroxyethyl cellulose is 6 parts, and the mass ratio of the hexagonal boron nitride powder to the hydroxyethyl cellulose is 1:1.5. the specific preparation process comprises the following steps: dissolving hydroxyethyl cellulose in deionized water, adding hexagonal boron nitride powder, ball milling to obtain hydroxyethyl cellulose modified boron nitride nanosheet suspension, and drying to obtain the hydroxyethyl cellulose modified boron nitride nanosheets. The ball milling process is to ball mill for 12 hours at 550 rpm.
The metal stearate is selected from zinc stearate.
The aqueous polyurethane dispersion has a solids content of 45wt%.
The polyamino silane coupling agent is selected from 3-diethylenetriamine propyl trimethoxy silane.
The dispersing agent is selected from sodium lignin sulfonate.
The defoamer is selected from polydimethyl siloxane.
The preparation method of the coating for the high-performance sand paper comprises the following steps:
(1) Dividing water into two parts, adding aqueous polyurethane dispersion liquid into a first part of water, then adding metal stearate, a dispersing agent and a defoaming agent, and fully stirring to obtain a first mixed liquid;
(2) Adding hydroxyethyl cellulose modified boron nitride nano-sheet and polyamino silane coupling agent into the second part of water, and fully stirring to obtain a second mixed solution;
(3) And adding the second mixed solution into the first mixed solution, fully stirring, standing, and discharging to obtain the coating for the high-performance sand paper.
In the step (1), water is divided into two equal parts, and the stirring speed is 550r/min; in the step (2), the stirring speed is 680r/min; in the step (3), the stirring speed is 620r/min.
Comparative example 4
The coating for the high-performance sand paper comprises the following raw materials in parts by weight:
40 parts of stearic acid metal salt,
25 Parts of aqueous polyurethane dispersion,
6 Parts of hydroxyethyl cellulose modified boron nitride nano-sheet,
1.5 Parts of aminosilane coupling agent,
1 Part of dispersing agent,
1 Part of defoaming agent,
50 Parts of water;
Wherein, the hydroxyethyl cellulose modified boron nitride nano-sheet is prepared by ball milling and drying hexagonal boron nitride powder and hydroxyethyl cellulose in aqueous solution, the mass sum of the hexagonal boron nitride powder and the hydroxyethyl cellulose is 6 parts, and the mass ratio of the hexagonal boron nitride powder to the hydroxyethyl cellulose is 1:1.1. the specific preparation process comprises the following steps: dissolving hydroxyethyl cellulose in deionized water, adding hexagonal boron nitride powder, ball milling to obtain hydroxyethyl cellulose modified boron nitride nanosheet suspension, and drying to obtain the hydroxyethyl cellulose modified boron nitride nanosheets. The ball milling process is to ball mill for 12 hours at 550 rpm.
The metal stearate is selected from zinc stearate.
The aqueous polyurethane dispersion has a solids content of 45wt%.
The aminosilane coupling agent is selected from gamma-aminopropyl triethoxysilane.
The dispersing agent is selected from sodium lignin sulfonate.
The defoamer is selected from polydimethyl siloxane.
The preparation method of the coating for the high-performance sand paper comprises the following steps:
(1) Dividing water into two parts, adding aqueous polyurethane dispersion liquid into a first part of water, then adding metal stearate, a dispersing agent and a defoaming agent, and fully stirring to obtain a first mixed liquid;
(2) Adding hydroxyethyl cellulose modified boron nitride nano-sheet and an aminosilane coupling agent into the second part of water, and fully stirring to obtain a second mixed solution;
(3) And adding the second mixed solution into the first mixed solution, fully stirring, standing, and discharging to obtain the coating for the high-performance sand paper.
In the step (1), water is divided into two equal parts, and the stirring speed is 550r/min; in the step (2), the stirring speed is 680r/min; in the step (3), the stirring speed is 620r/min.
Comparative example 5
The coating for the high-performance sand paper comprises the following raw materials in parts by weight:
40 parts of stearic acid metal salt,
25 Parts of aqueous polyurethane dispersion,
6 Parts of hydroxyethyl cellulose modified boron nitride nano-sheet,
0.5 Part of polyamino silane coupling agent,
1 Part of dispersing agent,
1 Part of defoaming agent,
50 Parts of water;
Wherein, the hydroxyethyl cellulose modified boron nitride nano-sheet is prepared by ball milling and drying hexagonal boron nitride powder and hydroxyethyl cellulose in aqueous solution, the mass sum of the hexagonal boron nitride powder and the hydroxyethyl cellulose is 6 parts, and the mass ratio of the hexagonal boron nitride powder to the hydroxyethyl cellulose is 1:1.1. the specific preparation process comprises the following steps: dissolving hydroxyethyl cellulose in deionized water, adding hexagonal boron nitride powder, ball milling to obtain hydroxyethyl cellulose modified boron nitride nanosheet suspension, and drying to obtain the hydroxyethyl cellulose modified boron nitride nanosheets. The ball milling process is to ball mill for 12 hours at 550 rpm.
The metal stearate is selected from zinc stearate.
The aqueous polyurethane dispersion has a solids content of 45wt%.
The polyamino silane coupling agent is selected from 3-diethylenetriamine propyl trimethoxy silane.
The dispersing agent is selected from sodium lignin sulfonate.
The defoamer is selected from polydimethyl siloxane.
The preparation method of the coating for the high-performance sand paper comprises the following steps:
(1) Dividing water into two parts, adding aqueous polyurethane dispersion liquid into a first part of water, then adding metal stearate, a dispersing agent and a defoaming agent, and fully stirring to obtain a first mixed liquid;
(2) Adding hydroxyethyl cellulose modified boron nitride nano-sheet and polyamino silane coupling agent into the second part of water, and fully stirring to obtain a second mixed solution;
(3) And adding the second mixed solution into the first mixed solution, fully stirring, standing, and discharging to obtain the coating for the high-performance sand paper.
In the step (1), water is divided into two equal parts, and the stirring speed is 550r/min; in the step (2), the stirring speed is 680r/min; in the step (3), the stirring speed is 620r/min.
Comparative example 6
The coating for the high-performance sand paper comprises the following raw materials in parts by weight:
40 parts of stearic acid metal salt,
25 Parts of aqueous polyurethane dispersion,
6 Parts of hydroxyethyl cellulose modified boron nitride nano-sheet,
4 Parts of polyamino silane coupling agent,
1 Part of dispersing agent,
1 Part of defoaming agent,
50 Parts of water;
Wherein, the hydroxyethyl cellulose modified boron nitride nano-sheet is prepared by ball milling and drying hexagonal boron nitride powder and hydroxyethyl cellulose in aqueous solution, the mass sum of the hexagonal boron nitride powder and the hydroxyethyl cellulose is 6 parts, and the mass ratio of the hexagonal boron nitride powder to the hydroxyethyl cellulose is 1:1.1. the specific preparation process comprises the following steps: dissolving hydroxyethyl cellulose in deionized water, adding hexagonal boron nitride powder, ball milling to obtain hydroxyethyl cellulose modified boron nitride nanosheet suspension, and drying to obtain the hydroxyethyl cellulose modified boron nitride nanosheets. The ball milling process is to ball mill for 12 hours at 550 rpm.
The metal stearate is selected from zinc stearate.
The aqueous polyurethane dispersion has a solids content of 45wt%.
The polyamino silane coupling agent is selected from 3-diethylenetriamine propyl trimethoxy silane.
The dispersing agent is selected from sodium lignin sulfonate.
The defoamer is selected from polydimethyl siloxane.
The preparation method of the coating for the high-performance sand paper comprises the following steps:
(1) Dividing water into two parts, adding aqueous polyurethane dispersion liquid into a first part of water, then adding metal stearate, a dispersing agent and a defoaming agent, and fully stirring to obtain a first mixed liquid;
(2) Adding hydroxyethyl cellulose modified boron nitride nano-sheet and polyamino silane coupling agent into the second part of water, and fully stirring to obtain a second mixed solution;
(3) And adding the second mixed solution into the first mixed solution, fully stirring, standing, and discharging to obtain the coating for the high-performance sand paper.
In the step (1), water is divided into two equal parts, and the stirring speed is 550r/min; in the step (2), the stirring speed is 680r/min; in the step (3), the stirring speed is 620r/min.
Performance test after the treated substrate was subjected to spreading, sand planting, and top coating, the high performance coated abrasives prepared in examples 1 to 9 and comparative examples 1 to 6 were further coated with the coatings for coated abrasives, to prepare coated abrasives corresponding to examples 1 to 9 and comparative examples 1 to 6. And (3) polishing the paint surface by adopting a wet grinding process, and observing blocking and falling off conditions of sandpaper after polishing after 2 minutes. Wherein, the blockage level and the shedding situation are expressed as A, B, C, D, E, F, and the blockage level and the shedding situation are increased by A to F, namely the performance is gradually deteriorated.
Table 1 sanding conditions for the sandpaper produced in examples 1-9
Table 2 sanding conditions for comparative examples 1-6
The high-performance coating for the sand paper prepared in the embodiments 1-9 can meet the use requirement of the sand paper under the wet grinding condition, reduce the influence of moisture on the coating in the wet grinding process, prevent the coating from falling off easily and have excellent anti-blocking performance. From examples 1-9, it can be seen that the coating meets the use requirements of hardness, toughness, wear resistance and water resistance when 2-10 parts of hydroxyethyl cellulose modified boron nitride nano-sheet are used. In particular, as can be seen from examples 1-2, 4 and 9, the coating properties are better when the hydroxyethyl cellulose modified boron nitride nanoplatelets are 5-6 parts: the hydroxyethyl cellulose modified boron nitride nano-sheet has small dosage, is difficult to construct a complete heat conduction network with stearic acid metal salt, and has limited improvement of wear resistance; when the dosage of the hydroxyethyl cellulose modified boron nitride nano-sheet is excessive, the performance is improved only in a limited way compared with the dosage of the stearic acid metal salt, and the problem of falling off during polishing is possibly faced. Compared with example 9, in comparative example 1, the boron nitride nano-sheets are simply added, the modified stripping is not performed by using hydroxyethyl cellulose, the boron nitride nano-sheets are unevenly dispersed in the coating, the boron nitride nano-sheets are easy to fall off in the polishing process, and the blocking condition is serious. Likewise, comparative examples 2-3 demonstrate that the use of too little hydroxyethyl cellulose not only affects the uniform dispersion of the boron nitride nanoplatelets, but also does not have enough reactive groups to participate in the reaction to fix it to the coating, resulting in problems of frictional shedding and clogging; and when the dosage of the hydroxyethyl cellulose is too large, the uniform dispersion of the boron nitride nano-sheets is also affected due to the high viscosity of the aqueous solution. In comparative example 4, the monoamino silane coupling agent is adopted, so that the dispersion performance of the boron nitride nanosheets can be improved, the crosslinking and curing effects can not be achieved, and the coating is easy to fall off and block. It can also be seen from comparative examples 5-6 that too much or too little polyaminosilane coupling agent does not balance the hardness, toughness, and abrasion resistance of the coating, resulting in reduced coating properties.
According to the data, the water-based polyurethane is used as coating matrix resin, water is used as solvent, and the hydroxyethyl cellulose modified boron nitride nano-sheet prepared by using the hydroxyethyl cellulose with good water solubility as a stripping agent can form chemical bonds with the cyanate group, the amino group and the amino group on the polyamino silane coupling agent remained in the water-based polyurethane, so that the coating forms a compact network structure, the compactness and the water resistance of the coating are improved, the influence of water in the wet grinding process of the abrasive paper on the coating is reduced, and the abrasive paper prepared by the coating for the abrasive paper has excellent grinding amount and blocking resistance.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, a number of simple variants of the technical solution of the invention are possible, including combinations of the individual technical features in any other suitable way, which simple variants and combinations should likewise be regarded as being disclosed by the invention, all falling within the scope of protection of the invention.
Claims (9)
1. The coating for the high-performance sand paper is characterized by comprising the following raw materials in parts by weight:
30-50 parts of stearic acid metal salt,
20-30 Parts of aqueous polyurethane dispersion,
2-10 Parts of hydroxyethyl cellulose modified boron nitride nano-sheet,
1-2 Parts of polyamino silane coupling agent,
0.1 To 2 parts of dispersing agent,
0.1-2 Parts of defoaming agent,
40-70 Parts of water;
Wherein, the hydroxyethyl cellulose modified boron nitride nano-sheet is prepared by ball milling and drying hexagonal boron nitride powder and hydroxyethyl cellulose in aqueous solution, and the mass ratio of the hexagonal boron nitride powder to the hydroxyethyl cellulose is 1: (1-1.2);
The polyamino silane coupling agent is selected from one or more of 3-diethylenetriamine propyl trimethoxy silane, 3-diethylenetriamine propyl triethoxy silane, 3-diethylenetriamine propyl methyl dimethoxy silane, 3-diethylenetriamine propyl methyl diethoxy silane, N- (2-aminoethyl) -3-aminopropyl methyl dimethoxy silane, N-2-aminoethyl-3-aminopropyl triethoxy silane and N-2-aminoethyl-3-aminopropyl trimethoxy silane.
2. A coating for high performance coated abrasive according to claim 1, wherein the metal stearate is selected from one or more of zinc stearate, calcium stearate, magnesium stearate, and barium stearate.
3. A high performance coated abrasive according to claim 1, wherein the aqueous polyurethane dispersion has a solids content of 40 to 50wt%; 5-6 parts of hydroxyethyl cellulose modified boron nitride nano-sheet.
4. The coating for high-performance sand paper according to claim 1, wherein the preparation process of the hydroxyethyl cellulose modified boron nitride nano-sheet comprises the following steps: dissolving hydroxyethyl cellulose in deionized water, adding hexagonal boron nitride powder, ball milling to obtain hydroxyethyl cellulose modified boron nitride nanosheet suspension, and drying to obtain the hydroxyethyl cellulose modified boron nitride nanosheets.
5. A high performance coated abrasive according to claim 4, wherein the ball milling process is ball milling at 400-600rpm for 10-14 hours.
6. The coating for high-performance sandpaper as defined in claim 1, wherein said dispersant is one or more selected from the group consisting of sodium lignin sulfonate, sodium fatty alcohol polyoxyethylene ether sulfate, sodium polyacrylate and potassium polyacrylate.
7. The coating for high-performance coated abrasive according to claim 1, wherein the antifoaming agent is one or more selected from the group consisting of polydimethylsiloxane, glycerol polyoxypropylene ether, polyoxypropylene polyoxyethylene glycerol ether.
8. A method of preparing a coating for high performance coated abrasive according to claim 1, comprising the steps of:
(1) Dividing water into two parts, adding aqueous polyurethane dispersion liquid into a first part of water, then adding metal stearate, a dispersing agent and a defoaming agent, and fully stirring to obtain a first mixed liquid;
(2) Adding hydroxyethyl cellulose modified boron nitride nano-sheet and polyamino silane coupling agent into the second part of water, and fully stirring to obtain a second mixed solution;
(3) And adding the second mixed solution into the first mixed solution, fully stirring, standing, and discharging to obtain the coating for the high-performance sand paper.
9. The method of producing a high performance coated abrasive according to claim 8, wherein in step (1), the water is divided into two equal parts and the stirring rate is 500 to 600r/min; in the step (2), the stirring speed is 600-800r/min; in the step (3), the stirring speed is 500-700r/min.
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| CN117304535A (en) * | 2023-11-01 | 2023-12-29 | 陕西科技大学 | Boron nitride nanosheet/aramid nanofiber composite film ball-milled by hydroxyethyl cellulose and preparation method |
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