NL2034955B1 - Weather-resistant Silicon Steel Insulation Eco-Friendly Coating and its Preparation Method - Google Patents
Weather-resistant Silicon Steel Insulation Eco-Friendly Coating and its Preparation Method Download PDFInfo
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- NL2034955B1 NL2034955B1 NL2034955A NL2034955A NL2034955B1 NL 2034955 B1 NL2034955 B1 NL 2034955B1 NL 2034955 A NL2034955 A NL 2034955A NL 2034955 A NL2034955 A NL 2034955A NL 2034955 B1 NL2034955 B1 NL 2034955B1
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- silicon steel
- environmentally friendly
- weather
- coating
- insulation coating
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- 238000000576 coating method Methods 0.000 title claims abstract description 79
- 239000011248 coating agent Substances 0.000 title claims abstract description 63
- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 58
- 238000009413 insulation Methods 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title description 17
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 23
- 229920005989 resin Polymers 0.000 claims abstract description 14
- 239000011347 resin Substances 0.000 claims abstract description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 13
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims abstract description 12
- 150000003839 salts Chemical class 0.000 claims abstract description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000008367 deionised water Substances 0.000 claims abstract description 10
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 10
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 10
- 239000001301 oxygen Substances 0.000 claims abstract description 10
- 239000008119 colloidal silica Substances 0.000 claims abstract description 9
- 229920005862 polyol Polymers 0.000 claims abstract description 8
- 239000000654 additive Substances 0.000 claims abstract description 6
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 30
- 239000004925 Acrylic resin Substances 0.000 claims description 15
- 229920000178 Acrylic resin Polymers 0.000 claims description 15
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 14
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 14
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 12
- 239000006185 dispersion Substances 0.000 claims description 12
- 239000003822 epoxy resin Substances 0.000 claims description 12
- 239000005011 phenolic resin Substances 0.000 claims description 12
- 229920001568 phenolic resin Polymers 0.000 claims description 12
- 229920000647 polyepoxide Polymers 0.000 claims description 12
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 10
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 10
- 239000013530 defoamer Substances 0.000 claims description 10
- 229910052749 magnesium Inorganic materials 0.000 claims description 10
- 239000011777 magnesium Substances 0.000 claims description 10
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical class [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 9
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 9
- 229910052791 calcium Inorganic materials 0.000 claims description 9
- 239000011575 calcium Substances 0.000 claims description 9
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 8
- 229910052725 zinc Inorganic materials 0.000 claims description 8
- 239000011701 zinc Substances 0.000 claims description 8
- 239000011787 zinc oxide Substances 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- UGZADUVQMDAIAO-UHFFFAOYSA-L zinc hydroxide Chemical compound [OH-].[OH-].[Zn+2] UGZADUVQMDAIAO-UHFFFAOYSA-L 0.000 claims description 5
- 229910021511 zinc hydroxide Inorganic materials 0.000 claims description 5
- 229940007718 zinc hydroxide Drugs 0.000 claims description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- 239000001506 calcium phosphate Substances 0.000 claims description 4
- 229910000389 calcium phosphate Inorganic materials 0.000 claims description 4
- 235000011010 calcium phosphates Nutrition 0.000 claims description 4
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical group C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims description 4
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 claims description 4
- 239000002518 antifoaming agent Substances 0.000 claims description 3
- 239000000395 magnesium oxide Substances 0.000 claims description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 2
- 239000000292 calcium oxide Substances 0.000 claims description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 2
- 235000010299 hexamethylene tetramine Nutrition 0.000 claims description 2
- 239000004312 hexamethylene tetramine Substances 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 claims 4
- 150000003077 polyols Chemical class 0.000 claims 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims 2
- 239000000377 silicon dioxide Substances 0.000 claims 2
- 150000002978 peroxides Chemical class 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 8
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 abstract description 6
- -1 small molecule polyol Chemical class 0.000 abstract description 5
- 229910052793 cadmium Inorganic materials 0.000 abstract description 4
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 abstract description 4
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052753 mercury Inorganic materials 0.000 abstract description 4
- 231100000331 toxic Toxicity 0.000 abstract description 4
- 230000002588 toxic effect Effects 0.000 abstract description 4
- HYIJOYWYWMSTKC-UHFFFAOYSA-N [Mg].[Cr].[Si] Chemical compound [Mg].[Cr].[Si] HYIJOYWYWMSTKC-UHFFFAOYSA-N 0.000 abstract description 2
- DQIPXGFHRRCVHY-UHFFFAOYSA-N chromium zinc Chemical compound [Cr].[Zn] DQIPXGFHRRCVHY-UHFFFAOYSA-N 0.000 abstract description 2
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 15
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 13
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 13
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 12
- 229920002545 silicone oil Polymers 0.000 description 12
- 238000003466 welding Methods 0.000 description 8
- 238000000137 annealing Methods 0.000 description 7
- 235000014692 zinc oxide Nutrition 0.000 description 7
- 239000002253 acid Substances 0.000 description 6
- 238000004080 punching Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000011651 chromium Substances 0.000 description 4
- 239000011229 interlayer Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 235000012245 magnesium oxide Nutrition 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 235000012255 calcium oxide Nutrition 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- RGPUVZXXZFNFBF-UHFFFAOYSA-K diphosphonooxyalumanyl dihydrogen phosphate Chemical compound [Al+3].OP(O)([O-])=O.OP(O)([O-])=O.OP(O)([O-])=O RGPUVZXXZFNFBF-UHFFFAOYSA-K 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 235000010216 calcium carbonate Nutrition 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 210000000582 semen Anatomy 0.000 description 1
- 235000002639 sodium chloride Nutrition 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- RNWHGQJWIACOKP-UHFFFAOYSA-N zinc;oxygen(2-) Chemical class [O-2].[Zn+2] RNWHGQJWIACOKP-UHFFFAOYSA-N 0.000 description 1
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- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/082—Anti-corrosive paints characterised by the anti-corrosive pigment
- C09D5/084—Inorganic compounds
-
- 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
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/62—Alcohols or phenols
-
- 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
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/62—Alcohols or phenols
- C08G59/621—Phenols
-
- 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
- C09D161/00—Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
- C09D161/04—Condensation polymers of aldehydes or ketones with phenols only
-
- 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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
-
- 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
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- 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
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
Described is a weather-resistant and eco-friendly insulation coating for silicon steel. The 5 coating is composed of the following components in weight percentages: 10-30% phosphoric acid, 0-10% amphoteric hydroxide, 0-10% metal oxide or oxygen-containing salt, 2-15% colloidal silica, 10-20% water-based resin, 0-5% small molecule polyol, 0-2% additives, and deionized water as the remaining. The sum of amphoteric hydroxide and metal oxide or oxygen-containing salt is greater than 0. The weather-resistant and eco-friendly insulation coating for silicon steel of 10 the present invention not only does not contain toxic and harmful elements such as hexavalent chromium Cr6+, lead Pb, mercury Hg, cadmium Cd, but also has better environmental performance than existing silicon steel coatings. Meanwhile, the coating properties can meet various application indicators of non-oriented silicon steel insulation coatings and are comparable or even superior to existing chromium-zinc salt and chromium-magnesium salt silicon steel 15 coatings.
Description
Weather-resistant Silicon Steel Insulation Eco-Friendly Coating and its Preparation
Method
The present invention relates to a surface coating process for non-oriented silicon steel, belonging to the field of coating technology, and more specifically relates to a weather-resistant silicon steel insulation environmentally friendly coating and its preparation method.
Non-oriented silicon steel is mainly used for medium and small-sized motors, and the production process requires stacking layers of non-oriented silicon steel sheets together.
Therefore, a coating is needed to insulate its surface. Currently used non-oriented silicon steel insulation coatings are all chromium-containing coatings. These coatings exhibit outstanding performance, but cannot meet environmental protection requirements. Therefore, the development of a weather-resistant silicon steel insulation environmentally friendly coating that meets both usage requirements and does not contain chromium is of great significance for meeting increasingly stringent environmental protection requirements.
1. Technical problem to be solved.
In view of the above-mentioned shortcomings and deficiencies of the existing technology, the present invention provides a weather-resistant silicon steel insulation environmentally friendly coating and its preparation method. The coating does not contain toxic and harmful elements such as hexavalent chromium Cr6+, lead Pb, mercury Hg, cadmium Cd, etc., is environmentally friendly, and can meet various application indicators of non-oriented silicon steel insulation coatings. 2. Technical Proposal
To achieve the above objectives, the main technical solution adopted by the present invention includes:
Firstly, the present invention provides a weather-resistant silicon steel insulation environmentally friendly coating, which contains the following components in mass percentage: phosphoric acid 10-30%, amphoteric hydroxide 0-10%, metal oxides or oxygen-containing salts of calcium/zinc/magnesium 0-10%, colloidal silica 2-15%, water-based resin 10-20%, small molecule polyol 0-5%, additives 0-2%, deionized water, the remainder; wherein the sum of the amphoteric hydroxide and the metal oxides or oxygen-containing salts is greater than O.
The amphoteric hydroxide is aluminium hydroxide, zinc hydroxide, or both, and the metal oxides ar oxygen-containing salts of calcium/zinc/magnesium are magnesium oxide, zinc oxide, calcium phosphate, calcium carbonate, and/or calcium oxide.
The colloidal silica includes inorganic silica sol and colloidal silica precursor, such as organic silicon resin.
The water-based resin is at least one of acrylic resin, phenolic resin, and epoxy resin.
Preferably, the water-based resin is acrylic resin or a mixture of phenolic resin and epoxy resin.
The small molecule polyol is at least one of ethylene glycol and glycerol.
The additives are at least one of defoamers, solvents, and curing agents. The defoamer is an organic silicon defoamer.
The ratio of the total mass of phosphoric acid to the metal oxides or oxygen-containing salts of calcium/zinc/magnesium and amphoteric hydroxide is 4-7:1.
The second aspect of the present invention provides a method for preparing a weather- resistant and environmentally-friendly insulation coating for silicon steel, comprising:
S1. Weighing each component of the weather-resistant and environmentally-friendly insulation coating for silicon steel as described above;
S2. Stirring and mixing the phosphoric acid, amphoteric hydroxide, or metal oxide or oxygen salt of calcium/zinc/magnesium with a suitable amount of deionized water to obtain a first dispersion;
S3. Stirring and mixing the water-based resin, small molecule polyol, and a suitable amount of deionized water to obtain a second dispersion;
S4. Stirring and mixing the colloidal silica, the first dispersion, the second dispersion, and the remaining deionized water to obtain the weather-resistant and environmentally-friendly insulation coating for silicon steel.
The weather-resistant and environmentally-friendly insulation coating for silicon steel can be applied to the surface of non-oriented silicon steel by spraying, brushing, dipping, spinning, scraping, and other methods. 3. Beneficial Effects:
The technical effects of the present invention are as follows: (1) The environmentally friendly coating for weather-resistant silicon steel insulation in this invention does not contain toxic and harmful elements such as hexavalent chromium Cré+, lead
Pb, mercury Hg, and cadmium Cd, and complies with the environmental standards of the EU
RoHS Directive. It enhances the competitiveness of Chinese electronic products in the world market and contributes to environmental protection. (2) The weather-resistant silicon steel insulation coating in this invention, after curing, exhibits excellent insulation properties (interlayer resistance of 5-50Q*cm2)}, electrical strength (230kv/mm), adhesion, corrosion resistance, heat resistance, punching properties, and weldability on the surface of non-oriented silicon steel. It can meet all the application requirements of non-oriented silicon steel insulation coatings. Compared with existing products, it has excellent stability (can be stored for more than 3 months), can achieve extremely thin coating thickness (0.2-0.4pum) while meeting the quality requirements of non-oriented silicon steel products, shows good resistance to various refrigerants, has excellent TIG welding properties (> 1000mm/min}, excellent adhesion {no cracks in the circular rod bending test, 3mm, 1ISO1519), good hydrolysis resistance (no change after boiling water immersion for 6 hours), high hardness (> 9H), and punching properties (>>4 million times compared to bare steel) comparable to existing chromium-containing products. (3) The weather-resistant silicon steel insulation coating in this invention has good annealing performance after curing, with a interlayer resistance retention rate of above 40% after annealing,
TIG welding performance still > 1000mm/min (SEP1210, welding speed), and adhesion unchanged (no peeling in the circular rod bending test, 3mm, 1SO1519), with a shrinkage rate not exceeding 2%.
Embodiment 1:
This implementation embodiment provides a weather-resistant silicon steel insulation environmentally friendly coating, which comprises the following components: phosphoric acid (85% acid) 30%, aluminium hydroxide 6%, inorganic silica sol 8%, acrylic resin 12%, propylene glycol 4%, dimethyl silicone oil (defoaming agent) 1%, and the balance is water. The preparation process is as follows: (1) Mix phosphoric acid, aluminium hydroxide, magnesium. oxide, and 1/3 of water to prepare the first dispersion; (2) Mix acrylic resin, glycerol (small molecule polyol), and 1/3 of water to prepare the second dispersion; (3) Mix colloidal silica, the first dispersion, the second dispersion, and the remaining 1/3 of deionized water to prepare a weather-resistant and environmentally friendly silicon steel insulation coating.
Embodiment 2
This embodiment provides a weather-resistant and environmentally friendly silicon steel insulation coating, comprising the following components: phosphoric acid (85% acid) 30%, aluminium hydroxide 7.5%, inorganic silica sol 8%, acrylic resin 12%, glycerol 4%, dimethyl silicone oil {(defoamer} 1%, and the remainder being water. The preparation process is as described in Embodiment 1.
Embodiment 3
This embodiment provides a weather-resistant and environmentally friendly silicon steel insulation coating, comprising the following components: phosphoric acid {85% acid) 30%, aluminium hydroxide 3%, zinc oxide 1.5%, inorganic silica sol 6%, acrylic resin 12%, glycerol 4%, dimethyl silicone oil (defoamer) 1%, and the remainder being water. The preparation process is as described in Embodiment 1.
Embodiment 4
This embodiment provides a weather-resistant silicone steel insulation environmentally friendly coating, which comprises the following components: phosphoric acid (85% acid) 30%, aluminium hydroxide 6%, inorganic silica sol 6%, phenolic resin 7.5%, epoxy resin 5%, glycerol 3%, dimethyl silicone oil (defoaming agent) 1%, and the remainder is water. The preparation process is described in Embodiment 1.
Embodiment 5
This embodiment provides a weather-resistant and environmentally friendly insulation coating for silicon steel, comprising the following components: 30% phosphoric acid (85 acid), 6% aluminium hydroxide, 6% inorganic silica sol, 6% phenolic resin, 6% epoxy resin, 3% glycerol, 1% dimethyl silicone oil (defoamer), and the remainder being water. The preparation process is the same as Embodiment 1.
Embodiment 6
This embodiment provides a weather-resistant and environmentally friendly insulation coating for silicon steel, comprising the following components: 30% phosphoric acid (85 acid), 6% aluminium hydroxide, 6% inorganic silica sol, 6% phenolic resin, 8% epoxy resin, 3% glycerol, 1% dimethyl silicone oil (defoamer), 1% acetone, and the remainder being water. The preparation process is the same as Embodiment 1.
Embodiment 7
This embodiment provides a weather-resistant and environmentally friendly insulation coating for silicon steel, comprising the following components: 30% phosphoric acid, 3% aluminium hydroxide, 1% zinc oxide, 15% inorganic silica sol, 14% acrylic resin, 5% glycerol, 1% dimethyl silicone oil (defoamer), and the remainder being water. The preparation process is the same as Embodiment 1.
Embodiment 8
This embodiment provides a weather-resistant and environmentally friendly insulation coating for silicon steel, comprising the following components: 28% phosphoric acid, 5% zinc hydroxide, 2% magnesium oxide, 6% inorganic silica sol, 14% acrylic resin, 5% glycerol, 1% dimethyl silicone oil (defoamer), 1% acetone, and the remainder being water. The preparation process is the same as Embodiment 1.
Embodiment 9
This embodiment provides a weather-resistant and environmentally friendly coating for silicon steel, comprising the following components: 25% phosphoric acid, 6% zinc hydroxide,
1% zinc oxide, 7% inorganic silica sol, 14% acrylic resin, 5% propylene glycol, 1% dimethyl silicone oil, 1% acetone, and the remainder being water. The preparation process is described in Embodiment 1. 5 Embodiment 10
This embodiment provides a weather-resistant and environmentally friendly coating for silicon steel, comprising the following components: 20% phosphoric acid, 6% zinc hydroxide, 1% zinc oxide, 7% inorganic silica sol, 8% phenolic resin, 6% epoxy resin, 5% propylene glycol, 1% dimethyl silicone oil, 1% acetone, and the remainder being water. The preparation process is described in Embodiment 1.
Embodiment 11
This embodiment provides a weather-resistant and environmentally friendly coating for silicon steel, comprising the following components: 15% phosphoric acid, 7% calcium phosphate, 12% inorganic silica sol, 12% acrylic resin, 5% propylene glycol, 1% dimethyl silicone oil, and the remainder being water. The preparation process is described in
Embodiment 1.
Embodiment12
This embodiment provides a weather-resistant and environmentally friendly coating for silicon steel, comprising the following components: 10% phosphoric acid, 4% aluminium hydroxide, 15% organic silicon resin, 15% acrylic resin, 2% ethylene glycol, 1% dimethyl silicone ail, and the remainder being water. The preparation process is described in
Embodiment 1.
Embodiment 13
This embodiment provides a weather-resistant silicon steel insulation environmental coating, which includes the following components: 20% phosphoric acid, 5% aluminium hydroxide, 2% calcium phosphate, 15% organosilicon resin, 7.5% phenolic resin, 5% epoxy resin, 2% propylene glycol, 1% dimethyl silicone oil, 1% curing agent {hexamethylenetetramine), and the remainder is water. The preparation process is as described in Embodiment 1.
The coating of each embodiment is subjected to performance testing, and the testing items, methods/instruments are shown in table 1.
Table 1 mee OD eme | @
Breakdown Voltage © 135C transformer oil immersion for 7 days, — | mr
Continuous Temperature 15 IEC 60404-12 eme I
Interlayer Resistance After 16 ASTM A717 (Franklin), resistance retention ns EE
TIG Weldability After 17 SEP1210, welding speed ns EE
Freeze resistance after 20 R134a, R22, DIN8944 fo EE hh
The performance test results of the weather-resistant silicon steel insulation coating in
Embodiments 1-13 under the annealing condition of temperature: 790°C for 2 hours, and atmosphere: mixed nitrogen and hydrogen are shown in table 2.
Table 2
The performance test results of the weather-resistant silicon steel insulation coating in
Embodiments 1-13 under the annealing condition of temperature: 790°C*2 hours, and atmosphere: mixed nitrogen and hydrogen are as follows:
As seen from the above, the weather-resistant silicon steel insulation environmentally friendly coating prepared by the present invention is a light grey transparent coating after curing, with a density of about 2-3g/cm3, an electrical strength of 230KV/mm, TIG welding speed of > 1000mm/min, strong resistance to breakdown, good adhesion, hardness of 9H or more, significantly improving punching performance, shrinkage rate not exceeding 0.2%, good resistance to hydrolysis, and good tolerance to various refrigerants, with good air temperature resistance and sustained temperature resistance. In addition, the coating has adaptability to fire resistance, and after weathering, the interlayer resistance retention rate is above 40%, the TIG welding speed is still greater than 1000mm/min, and the coating has no peeling during the round bar test, indicating good adhesion to metal. The shrinkage rate after annealing is also less than 0.2%, and it has excellent tolerance to refrigerants.
The weather-resistant silicon steel insulation environmentally friendly coating of the present invention meets all usage requirements. Among them, (5) and (8) welding speed > 1000mm/min indicate that normal welding is ensured even at maximum speed. (8) a square marked with GT
OB indicates that the adhesion is very strong and not easy to peel off, ensuring electrical insulation. (©) The punching performance, the naked steel is generally 2 to 3 million times, while the coated steel sheet is above 4 million times, indicating that the wear of the steel sheet on the punching machine tool is slow, which is conducive to reducing the consumption rate of consumables and saving costs.
Furthermore, various performance tests were conducted on the coatings of each embodiment, especially comparing several key performance indicators that determine the application of coatings, such as (3) and (16-18) so on (assuming a thickness of 0.4mm), see table 3.
Table 3 [@ Je] © [STe ® _
Embodiment 1 14.550*ci/Piece | 44% | >1000mm/min | No 0.12% | Excellent
EE I | on
Embodiment 2 15.58.Q*cii/Piece | 45% | >1000mm/min No 0.14% | Excellent
EEE eg oa
Embodiment 3 13.230*cii/Piece | 45% | >1000mm/min | No 0.15% | Excellent
EE oy
Embodiment 4 15.72Q*cid/Piece | 46% | >1000mm/min | No 0.11% | Excellent
EE ew ov
Embodiment 5 15.18Q%cii/Piece | 48% | >1000mm/min | No 0.07% | Excellent
EE | ow
Embodiment 6 16.77Q*cii/Piece | 49% | >1000mm/min | No 0.08% | Excellent on
Embodiment 7 13.38Q*cii/Piece | 41% | >1000mm/min | No 0.15% | Excellent
EEE
Embodiments& | 10.78Q*ci/Piece | 40% | >1000mm/min | No 0.17% | Excellent
I | a
Embodiments8 | 11.44Q*ui/Piece | 41% | >1000mm/min | No 0.19% | Excellent ee | ov
Embodimenis10 | 12.06Q%aii/Piece | 40% | >1000mm/min | No 0.18% | Excellent
EE ET | ow
Embodiment 11 11.220%cii/Piece | 42% | >1000mm/min No 0.17% | Excellent
EE EE | a
Embodiment 12 | 11.35Q%cii/Piece | 43% | >1000mm/min | No 0.17% | Excellent ll = a ==
Embodiment 13 | 11.75Q%ci/Piece | 40% | >1000mm/min | No 0.16% | Excellent
Jl al ++
As shown in the table above, the coating of Embodiments 1-6 is superior to that of the other embodiments. This is mainly because Embodiment 1-6 uses aluminium hydroxide, which can be combined with phosphoric acid to form aluminium dihydrogen phosphate, the main component of the coating. Although calcium, zinc, and magnesium provided by zinc oxide or metal oxides in other embodiments have properties similar to aluminium, the coating performance formed by aluminium dihydrogen phosphate is still the best. In comparison to
Embodiment 7, which also mainly uses aluminium hydroxide, the aluminium and other additives in Embodiment 7 are too small, resulting in inferior coating performance. This suggests that a ratio of 4-7:1 between phosphoric acid and amphoteric hydroxides (or calcium, magnesium, and zinc oxides or salts) in the coating composition is favourable for producing coatings with better insulation and post-annealing performance.
In addition, in the coating of Embodiments 1-3, acrylic resin is used alone as the water- based resin, while in Embodiments 4-6, phenolic resin and epoxy resin are used in a ratio of 3:2-4. Comparing the two, it is found that using a certain proportion of phenolic resin and epoxy resin can replace the use of acrylic resin alone. Furthermore, compared to using acrylic resin alone, using a combination of phenolic resin and epoxy resin can improve the post-annealing performance of the coating to some extent, especially in terms of adhesion and shrinkage.
Furthermore, the comprehensive performance of the present invention coating is compared with the existing chromate-zinc salt and chromate-magnesium salt silicon steel coatings as follows shown in table 4.
Table 4:
Coating colour Greenish yellow Bluish green transparent Light grey
TE en en”
Finished product 4 Hour 7 Days >3 months semen
Environmental Not environmentally friendly | Not environmentally friendly | Environmentally
Coating Thickness Standard (thickness) Comparable Extremely Thin, mm ee eae
Freezing Agent | Tolerance Tolerance Tolerance
Er ee ee
Punching Good Comparable Comparable pee
Note: The benchmark in the above table is based on the performance standards of products with the same specifications and production processes as mainstream brands in the market, such as Baosteel, Wusteel, Shougang, etc.
From the above comparison, it can be seen that the weather-resistant silicon steel insulation environmentally friendly coating of the present invention not only does not contain toxic and harmful elements such as hexavalent chromium Cr 6+, lead Pb, mercury Hg, cadmium Cd, etc, but also has better environmental performance than existing silicon steel coatings. At the same time, the coating properties can meet all the application indicators of non-oriented silicon steel insulation coatings and are equivalent to or even better than existing chromium zinc salt and chromium magnesium salt silicon steel coatings.
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