CN109054560A - A kind of electrical sheet coatings - Google Patents
A kind of electrical sheet coatings Download PDFInfo
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- CN109054560A CN109054560A CN201810891789.2A CN201810891789A CN109054560A CN 109054560 A CN109054560 A CN 109054560A CN 201810891789 A CN201810891789 A CN 201810891789A CN 109054560 A CN109054560 A CN 109054560A
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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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
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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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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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
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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
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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
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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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
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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Abstract
The invention discloses a kind of electrical sheet coatings, it is made of the raw material of following mass fraction: 3%~7% modified inorganic filler, 3%~5% ethyl alcohol, 6%~10% silane coupling agent, 3%~5% alkoxysilane mixture, 5%~10% water dispersed resin prepolymer, 0.1%~0.8% wetting agent, 0.1%~0.3% defoaming agent, surplus is deionized water.The coatings can solve the problems, such as when Si oxide film layer is thicker uneven easy to crack, form the Organic inorganic film layer of even compact, and its corrosion resistance etc. is functional.
Description
Technical field
The present invention relates to field of paint more particularly to a kind of electrical sheet coatings.
Background technique
Silicon steel is Antaciron of the silicon content between 0.5%~6.5%, is a kind of important soft magnetic metal material,
It is mainly used for electronics, electric power and military industry manufacture transformer, electric machine iron core etc., the eddy-current loss (Pe) and its plate thickness of silicon steel
It is square directly proportional, therefore, need thinned silicon steel sheet stack being fitted together uses when manufacturing iron core, for effectively general
Vortex is restricted in each lamination, it usually needs on silicon steel sheet surface, coating has the surface covering of insulation performance, makes between steel disc
Mutually insulated.This coating is coated generally in silicon steel production process, i.e. silicon steel insulating coating；Silicon steel insulating coating
Organic coating, inorganic coating and Organic-inorganic composite (half is inorganic) coating three categories can be divided into.Special installation is used for except some
Material need to use outside full stress-strain coating, industrially to use based on organic-inorganic hybrid coatings, the tradition in this field is matched
Side is using containing chromate, the inorganic-organic compound coating of phosphate and resin；Wherein, chromic salt or phosphatoptosis exist
As film forming skeleton, free Cr VI provides corrosion resistance and self-healing properties for metal surface, resin dispersion in system with
Inorganic material is formed a film jointly to improve film adhesion, lubricity and punching performance, can be obtained using such coatings containing chromium
It obtains in insulating properties, corrosion resistance, processing performance and adhesion, all very outstanding coating of secondary adhesion etc..But
Cr VI has severe toxicity and environment toxic, is a kind of environmental contaminants being difficult to clean off, and in recent years it has also been found that Cr VI tool
There is strong carcinogenesis.With the increasingly raising of social environment consciousness, the states such as European Union have launched respectively to be forbidden in the product for civilian use
Using the bill of Cr VI, China also in put into effect in recent years limitation use Cr VI relevant regulations.Therefore, people are urgent
Wish that finding one kind has equal performance while not chromyl environment-friendly type insulated dope.
Currently, Chrome-free insulation coating known to researcher is formulated still based on phosphoric acid salt inorganic-organic compound system,
Comprising superphosphates such as aluminium dihydrogen phosphates as main inorganic filmogen；Polyacrylic resin, epoxy resin etc. are to have
Machine matrix, and improve punching and the adhesion property of coating；The inorganic particles such as optional addition silicate are as inorganic filler to adjust
The wearability and surface roughness of coating maintain surface resistivity and reduce the generation of welding bubble；And dispersing agent, surface
Activating agent, crosslinking agent, the auxiliary agents such as lubricant.This field researcher is in terms of substitution chromate provides the material of corrosion inhibition
Many work have been done, titanium compound is such as added, zirconium compounds, molybdate, tungstates, boric acid, rare earth material and adjustment have
Machine resinous molecular structure etc..If Chinese patent CN200780035915.4 is proposed, phosphate is added in cobalt hydroxide and strontium hydroxide
Can improve the uniformity and consistency of film layer in coating, and the titanium chelate with coupled action can improve organic resin and
The compatibility of metal phosphate and the adhesive force of coating；Chinese patent CN200910199396.6 report, acetic acid zirconium, nitric acid
The auxiliary agent that zirconium, basic zirconium chloride, zirconium-n-butylate, zirconium-n-propylate etc. all can serve as to improve phosphate coating surfaces of tacky uses, and obtains
The coating obtained has good corrosion resistance, adhesion and heat resistance；It is proposed in Chinese patent CN200710053637.7, to
Molybdate is added in coating, heteropoly molybdic acid radical ion will be generated in acid medium and is adsorbed on phosphate layer, phosphate is supplemented
The imperfection and leakiness of film；Chinese patent CN200810233916.6 is proposed, is added into phosphate-based coatings
After tungstates, PO43- and WO42- can form strong oxidizing property phosphorus heteropoly tungstic acid in acid condition, to be formed comparatively dense
Insulating coating, and the corrosion resistance of coating is improved, meanwhile, titanate coupling agent is added in coating can improve the coating property of coating
And appearance of coat；Chinese patent CN200910053706.3 report, by the acylate of divalent and trivalent metal, including Mg,
The lactate of Al, Ca, Zn, Co, Ni and Sr etc., acetate, gluconate and citrate etc. are introduced into phosphate insulation
It after in coating, will decompose in coating sintering process, metal cation reacts with remaining phosphate radical, to rise
To the purpose for confining residual phosphorus acid group, it is tacky to solve the problems, such as that coating absorbs water；Chinese patent CN200810236580.9 proposition,
Rare earth Sc, cerium, lanthanum, yttrium etc. introduce system in the form of its oxide, hydroxide and various salt, can substitute six
Valence chromium ion provides Corrosion Protection, and the performances such as intensity, hardness, wear-resisting and rust-proofing for improving coating entirety simultaneously.
But above-mentioned molybdate, tungstates, vfanadium compound, zirconium compounds etc. itself often also there is toxicity and environment to endanger
Evil property, some toxicity of compound are not even weaker than chromate, therefore, are had little significance with such compound substitution chromate.Separately
Outside, this metal compound yield is smaller, and price is far expensive compared with chromic anhydride, and raw material can be greatly promoted when as additive
Material Cost, reduce the economic value of coating.In addition, will cause the only of water eutrophication since phosphate itself has
Special environmental hazard, it is therefore necessary to be handled using large-scale sewage treatment equipment.With increasingly mentioning for social environment consciousness
Height does not contain phosphate and pollution metal further it is desirable to be realized in coating without after hexavalent chromium
Ion.But consulting literatures are learnt, the system in related fields except above-mentioned phosphate-based coating is still seldom reported at present.
For example, Japan Patent JP2012-189150 proposes the method for forming insulation film that improved organosilicon material is host agent, with matter
It measures based on the alkoxy silane and silane coupling agent than 0.05~1.0, additionally incorporates flakey micron order or submicron order two
Silicon oxide powder is to improve the still unresolved silane one of the uniformity of coating, insulation performance and welding performance after annealing, but the formula
Easily there is surface defect in flash cure process in secondary film forming, it is difficult to the shortcomings that practical application；For another example, Japan Patent JP2009-
254271 report it is a kind of using zirconium compounds as the coatings formula of host agent, it includes zirconium compounds (in terms of ZrO2) 20~
70wt%, boron compound (in terms of B2O3) 0.1~5wt%, silicon compound (in terms of SiO2) 10~50wt%, surplus are organic
Resin, it is optional that a small amount of nitrate, phosphate or silane coupling agent is added.The coating that the coating is formed has good corrosion-resistant
Property, processing performance and appearance homogeneity, but the price is very expensive for zirconates are that the form a film coating of host agent is difficult in reality with zirconates
It is applied in production.
Summary of the invention
Present invention seek to address that the above-mentioned problems of the prior art, an object of the present invention is to provide a kind of electricity
Work steel coatings, the coatings can solve the problems, such as when Si oxide film layer is thicker uneven easy to crack, be formed uniform
Fine and close Organic inorganic film layer, and its corrosion resistance etc. is functional.
To achieve the goals above, the present invention provides a kind of electrical sheet coatings, by the original of following mass fraction
Material is made: 3%~10% modified inorganic filler, 1%~10% ethyl alcohol, 6%~10% silane coupling agent, 3%~5% alcoxyl
Base silane mixture, 5%~10% water dispersed resin prepolymer, 0.1%~0.8% wetting agent, 0.1%~0.3% defoaming
Agent, surplus are deionized water.
Further, inorganic oxide material of the modified inorganic filler for surface institute hydroxyl, the inorganic oxide
The scale topography of object material is sub-micron or nanoscale pulverized particles, and the draw ratio of the pulverized particles is greater than 10.
Preferably, the modified inorganic filler is tabular alumina, flaky silicon dioxide, sheet magnesia, the vigorous nurse of sheet
Stone, boehmite are chosen any one kind of them in diaspore or a variety of.
Preferably, the pulverized particles are long through than being greater than 20, average grain diameter is between 10nm~100nm.
Preferably, the silane coupling agent is KH-550 (3-aminopropyltriethoxysilane).
Further, the alkoxysilane mixture is the tri-alkoxy silicon that one or more general formulas are Si (OR1) 3R2
Alkane or its hydrolysis derivative, the dialkoxy silicane or its hydrolysis derivative for being Si (OR1) 2 (R2) 2 with one or more general formulas
Mixture, ratio of components should make the alkoxy of the polycondensation containing hydrolyzable or hydroxyl quantity in mixture average per molecule should be 2.3
Between~2.7.
Further, the water dispersed resin prepolymer can be arbitrarily from poly- (methyl) esters of acrylic acid, polyvinyl acetate
Ester, polystyrene, the copolymer or above-mentioned substance of polyurethanes or above-mentioned substance and other common copolymerizable substances
It chooses in copolymer, is introduced in the form of through aqueous group modified linear polymer aqueous solution or aqueous polymer lotion.
It is another object of the present invention to the preparation methods for proposing a kind of electrical sheet coatings, and this method is with silane
Coupling agent modified flaky inorganic filler, the membrane-forming agent of arrange in pairs or groups alkoxy silane and silane coupling agent composition and aqueous has
Machine resin, can solve the problems, such as when Si oxide film layer is thicker uneven easy to crack, and the organic and inorganic for forming even compact is multiple
Film layer is closed, corrosion resistance etc. is functional, suitable for being applied in actual industrial production.
To achieve the goals above, the present invention proposes a kind of preparation method of electrical sheet coatings, the preparation side
Method comprises the following steps:
Step 1) while stirring simultaneously into reaction kettle by metering than successively put into purified water, methanol and sheet without
Machine filler powder after being warming up to 50 DEG C, is accounted for the amino silicane coupling agent of total amount 1/2 in 1 hour by metering than being slowly pumped into,
60~70 DEG C of 2~4h of reaction are warming up to, modified inorganic filler water dispersion liquid is made；
Step 2) by above-mentioned modified inorganic filler water dispersion liquid be cooled to 40 DEG C hereinafter, while stirring simultaneously by
Metering stirs 0.5~1h than successively putting into water-soluble resin prepolymer, alkoxy silane, remaining silane coupling agent；
Step 3) is added wetting agent and defoaming agent into slurries, stir after 0.5h with 1000 mesh filter screen filtering and dischargings to get
Non-chrome water-based electric steel insulating paint.
By adopting the above-described technical solution, compared with prior art, the present invention having the advantage that
1) the aqueous coatings of the present invention for non-orientation silicon steel, the primary non-organic component for forming coating are
The Si oxide network that alkoxysilane mixture and silane coupled agent composition dehydrated crosslinking are formed；By silane and metal
The hydroxyls dehydrate connection for aoxidizing layer surface, generates Me-O-Si key bridge and is fixed on steel surface, while silane coupling agent phase itself
It mutually is cross-linked to form predominantly silicon-oxide structure film layer, has good corrosion resistance and adhesion.Meanwhile coating silane coupling agent
Modified flaky inorganic filler participates in crosslinking and as anchor point, and the hydroxyls dehydrate for being coordinated intermolecular hydrogen bonding shrinks to form silicon-oxygen
It will not be shunk transversally on a plane due to film layer when network and generate cracking, avoid forming silane film film layer easily due to capillarity
The shortcomings that generating micro-crack.
2) in the aqueous coatings of chromium-free environment-friendly of the present invention, another main component is silane coupler modified piece
Shape inorganic filler；Flaky inorganic filler surface has great amount of hydroxy group, can be with silane coupling agent phase when pre- modified through silane coupling agent
Mutually crosslinking forms the surface that excellent compatibility is all had to inorganic material and organic resin.When being heating and curing, in coating
The silane coupling agent active group and residual hydroxyl on flaky inorganic filler surface participate in crosslinking, in silicon-oxygen reticular structure of formation
In play the role of anchor point, cross-direction shrinkage caused by capillary stress when dehydration forms silicon oxide film is greatly reduced, avoids coating
It cracks；Meanwhile sheet material stacking can play apparent barrier action to corrosive ion in the coating, significantly mention
Rise the corrosion resisting property of coating；Finally, flaky inorganic filler after silane coupler modified, has good with the resin in coating
Compatibility, the dispersion problem of non-uniform that inorganic filler occurs often is avoided, so that the linear macromolecule in coating is being crosslinked
Good interface can be formed with silicon-oxygen network after the lower crosslinking of agent effect to connect, play due performance.
3) also contain linear water soluble resin prepolymer in the aqueous coatings of chromium-free environment-friendly of the present invention, in drying
When solidification, the resin in coating can fill up silane film and shrink the hole generated, provide enough toughness for coating to prevent silane
Tearing tendency when film rapid draing makes the coating generated have fine and close smooth surface, while common with flaky inorganic filler
Excellent barrier action is provided, the coating to be formed is made while having that inorganic film intensity is high, insulating properties and heat-resist and organic
Even film layer is fine and close, adhesion and the good advantage of punching；In addition, linear water soluble polymers can slow down in coating significantly
The gelation rate of free silane coupling agent plays the role of extending coating storage time.
Specific embodiment
The invention will be further described below.
Embodiment 1:
Prepare the aqueous coatings that non-orientation silicon steel is used for described in this patent, each raw material proportioning (based on mass fraction)
Are as follows:
Methyltriethoxysilane: 1.8%
Dimethyl diethoxysilane: 1.8%
Sheet boehmite (average grain diameter about 30nm, draw ratio > 20): 5.0%
3-aminopropyltriethoxysilane: 9.0%
Water-soluble acrylic ester prepolymer (solid content 55%): 15.0%
Ethyl alcohol: 3.0%
3060 wetting agent of Genapol ED: 0.5%
2000 defoaming agent of SN-Defoamer: 0.3%
Surplus is deionized water, and deionized water is to use the purified municipal tap water of ion exchange resin.
Aqueous coatings preparation method for non-orientation silicon steel:
Under step 1) stirring, into reaction kettle by metering than successively putting into deionized water, ethyl alcohol and sheet boehmite,
After being warming up to 50 DEG C, the 3-aminopropyltriethoxysilane of total amount 1/2, heating are accounted for than being slowly pumped by metering in 1 hour
To 60~70 DEG C of reaction 3h, modified inorganic filler water dispersion liquid is made；
Above-mentioned modified inorganic filler water dispersion liquid is cooled to 40 DEG C hereinafter, throwing by metering than successively under stirring by step 2)
Enter water-soluble resin prepolymer, methyltriethoxysilane: dimethyl diethoxysilane and remaining three second of 3- aminopropyl
Oxysilane stirs 0.5h；
2000 defoaming agent of 3060 wetting agent of Genapol ED and SN-Defoamer is added into slurries for step 3), stirring
With 1000 mesh filter screen filtering and dischargings to get non-chrome water-based electric steel insulating paint after 0.5h.
Aqueous coatings for non-orientation silicon steel coat film build method:
Step 1) use commercial available alkaline degreased cleaning agent, by the non-orientation silicon steel plate of non-coating 65 DEG C of scrub 30s into
Row cleaning.It is dry with pure water rinsing 10s.
Appropriate above-mentioned aqueous, environmental protective coatings are added dropwise on the steel plate after cleaning for step 2), are coated with 4# paint roller,
Dry 60s is placed in 350 DEG C of drying boxes, and the insulation coating layer thickness of formation is about 0.8 μm.
Embodiment 2:
Prepare aqueous, environmental protective coatings described in this patent, each raw material proportioning (based on mass fraction) are as follows:
Methyltriethoxysilane: 2.0%
Dimethyl diethoxysilane: 2.0%
Flake nano magnesia (average grain diameter about 40nm, draw ratio > 20): 5.0%
3- aminopropyl triethoxysilane: 8.4%
Water-soluble acrylic ester prepolymer (solid content 55%): 15.0%
Ethyl alcohol: 4.2%
3060 wetting agent of Genapol ED: 0.5%
2000 defoaming agent of SN-Defoamer: 0.3%
Surplus is deionized water, and deionized water is to use the purified municipal tap water of ion exchange resin.
Aqueous coatings preparation method for non-orientation silicon steel:
Under step 1) stirring, into reaction kettle by metering than successively putting into deionized water, ethyl alcohol and flake nano magnesia,
After being warming up to 50 DEG C, the 3-aminopropyltriethoxysilane of total amount 1/2, heating are accounted for than being slowly pumped by metering in 1 hour
To 60~70 DEG C of reaction 3h, modified inorganic filler water dispersion liquid is made；
Above-mentioned modified inorganic filler water dispersion liquid is cooled to 40 DEG C hereinafter, throwing by metering than successively under stirring by step 2)
Enter water-soluble resin prepolymer, methyltriethoxysilane: dimethyl diethoxysilane and remaining three second of 3- aminopropyl
Oxysilane stirs 0.5h；
2000 defoaming agent of 3060 wetting agent of Genapol ED and SN-Defoamer is added into slurries for step 3), stirring
With 1000 mesh filter screen filtering and dischargings to get non-chrome water-based electric steel insulating paint of the present invention after 0.5h.
It is same as Example 1 to coat film build method.
Embodiment 3:
Prepare aqueous, environmental protective coatings described in this patent, each raw material proportioning (based on mass fraction) are as follows:
Methyltriethoxysilane: 1.8%
Dimethyl diethoxysilane: 1.8%
Flake nano silica (average grain diameter about 30nm, draw ratio > 20): 5.0%
3-aminopropyltriethoxysilane: 9.0%
Polyurethane aqueous emulsions (solid content 30%): 25.0%
Ethyl alcohol: 3.0%
3060 wetting agent of Genapol ED: 0.5%
2000 defoaming agent of SN-Defoamer: 0.3%
Surplus is deionized water, and deionized water is to use the purified municipal tap water of ion exchange resin.
Aqueous coatings preparation method for non-orientation silicon steel:
Under step 1) stirring, into reaction kettle by metering than successively putting into deionized water, ethyl alcohol and flake nano titanium dioxide
Silicon after being warming up to 50 DEG C, is accounted for the 3-aminopropyltriethoxysilane of total amount 1/2 in 1 hour by metering than being slowly pumped into,
60~70 DEG C of reaction 3h are warming up to, modified inorganic filler water dispersion liquid is made；
Above-mentioned modified inorganic filler water dispersion liquid is cooled to 40 DEG C hereinafter, throwing by metering than successively under stirring by step 2)
Enter water-soluble resin prepolymer, methyltriethoxysilane: dimethyl diethoxysilane and remaining three second of 3- aminopropyl
Oxysilane stirs 0.5h；
2000 defoaming agent of 3060 wetting agent of Genapol ED and SN-Defoamer is added into slurries for step 3), stirring
With 1000 mesh filter screen filtering and dischargings to get non-chrome water-based electric steel insulating paint of the present invention after 0.5h.
It is same as Example 1 to coat film build method.
Embodiment 4:
Prepare aqueous, environmental protective coatings described in this patent, each raw material proportioning (based on mass fraction) are as follows:
Methyltriethoxysilane: 2.5%
Dimethyl diethoxysilane: 2.5%
Flake nano silica (average grain diameter about 90nm, draw ratio > 20): 7%
3-aminopropyltriethoxysilane: 10%
Polyurethane aqueous emulsions (solid content 30%): 32.0%
Ethyl alcohol: 5.0%
3060 wetting agent of Genapol ED: 0.75%
2000 defoaming agent of SN-Defoamer: 0.28%
Surplus is deionized water, and deionized water is to use the purified municipal tap water of ion exchange resin.
Aqueous coatings preparation method for non-orientation silicon steel:
Under step 1) stirring, into reaction kettle by metering than successively putting into deionized water, ethyl alcohol and flake nano titanium dioxide
Silicon after being warming up to 50 DEG C, is accounted for the 3-aminopropyltriethoxysilane of total amount 1/2 in 1 hour by metering than being slowly pumped into,
60~70 DEG C of reaction 4h are warming up to, modified inorganic filler water dispersion liquid is made；
Above-mentioned modified inorganic filler water dispersion liquid is cooled to 40 DEG C hereinafter, throwing by metering than successively under stirring by step 2)
Enter water-soluble resin prepolymer, methyltriethoxysilane: dimethyl diethoxysilane and remaining three second of 3- aminopropyl
Oxysilane stirs 0.9h；
2000 defoaming agent of 3060 wetting agent of Genapol ED and SN-Defoamer is added into slurries for step 3), stirring
With 1000 mesh filter screen filtering and dischargings to get non-chrome water-based electric steel insulating paint of the present invention after 0.5h.
It is same as Example 1 to coat film build method.
Embodiment 5:
Prepare aqueous, environmental protective coatings described in this patent, each raw material proportioning (based on mass fraction) are as follows:
Methyltriethoxysilane: 1.6%
Dimethyl diethoxysilane: 1.6%
Flake nano silica (average grain diameter about 15nm, draw ratio > 20): 3.0%
3-aminopropyltriethoxysilane: 6%
Polyurethane aqueous emulsions (solid content 30%): 20.0%
Ethyl alcohol: 3.0%
3060 wetting agent of Genapol ED: 0.15%
2000 defoaming agent of SN-Defoamer: 0.1%
Surplus is deionized water, and deionized water is to use the purified municipal tap water of ion exchange resin.
Aqueous coatings preparation method for non-orientation silicon steel:
Under step 1) stirring, into reaction kettle by metering than successively putting into deionized water, ethyl alcohol and flake nano titanium dioxide
Silicon after being warming up to 50 DEG C, is accounted for the 3-aminopropyltriethoxysilane of total amount 1/2 in 1 hour by metering than being slowly pumped into,
60~70 DEG C of reaction 2h are warming up to, modified inorganic filler water dispersion liquid is made；
Above-mentioned modified inorganic filler water dispersion liquid is cooled to 40 DEG C hereinafter, throwing by metering than successively under stirring by step 2)
Enter water-soluble resin prepolymer, methyltriethoxysilane: dimethyl diethoxysilane and remaining three second of 3- aminopropyl
Oxysilane stirs 0.6h；
2000 defoaming agent of 3060 wetting agent of Genapol ED and SN-Defoamer is added into slurries for step 3), stirring
With 1000 mesh filter screen filtering and dischargings to get non-chrome water-based electric steel insulating paint of the present invention after 0.5h.
It is same as Example 1 to coat film build method.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (8)
1. a kind of electrical sheet coatings, which is characterized in that it is made of the raw material of following mass fraction (with active principle
Meter): 3%~7% modified inorganic filler, 3%~5% ethyl alcohol, 6%~10% silane coupling agent, 3%~5% alkoxy silane
Mixture, 5%~10% water dispersed resin prepolymer, 0.1%~0.8% wetting agent, 0.1%~0.3% defoaming agent, surplus are
Deionized water.
2. electrical sheet coatings according to claim 1, which is characterized in that the modified inorganic filler is surface institute
The inorganic oxide material of hydroxyl, the scale topography of the inorganic oxide material are sub-micron or nanoscale pulverized particles,
The draw ratio of the pulverized particles is greater than 10.
3. electrical sheet coatings according to claim 2, which is characterized in that the modified inorganic filler is sheet oxygen
Change aluminium, flaky silicon dioxide, sheet magnesia, sheet boehmite, boehmite, choose any one kind of them in diaspore or a variety of.
4. electrical sheet coatings according to claim 2, which is characterized in that the pulverized particles are long through than being greater than
20, average grain diameter is between 10nm~100nm.
5. electrical sheet coatings according to claim 1, which is characterized in that the silane coupling agent is KH-550.
6. electrical sheet coatings according to claim 1, which is characterized in that the alkoxysilane mixture is one
The trialkoxy silane or its hydrolysis derivative that kind or a variety of general formulas are Si (OR1) 3R2 are Si with one or more general formulas
(OR1) mixture of the dialkoxy silicane of 2 (R2) 2 or its hydrolysis derivative, ratio of components should make mixture average per molecule
In the polycondensation containing hydrolyzable alkoxy or hydroxyl quantity should be between 2.3~2.7.
7. electrical sheet coatings according to claim 1, which is characterized in that the water dispersed resin prepolymer can appoint
Meaning ground from the copolymer of polyacrylate, polyvinyl acetate, polystyrene, polyurethanes or above-mentioned substance, or on
State and chosen in substance and the copolymer of other common copolymerizable substances, with through aqueous group modified linear polymer aqueous solution or
The form of aqueous polymer lotion introduces.
8. a kind of preparation method of electrical sheet coatings, which is characterized in that the preparation method comprises the following steps:
Step 1) is filled out by metering than successively putting into purified water, methanol and flaky inorganic into reaction kettle simultaneously while stirring
Feed powder body after being warming up to 50 DEG C, is accounted for the amino silicane coupling agent of total amount 1/2 than being slowly pumped by metering in 1 hour, is warming up to
Modified inorganic filler water dispersion liquid is made in 60~70 DEG C of 2~4h of reaction；
Above-mentioned modified inorganic filler water dispersion liquid is cooled to 40 DEG C hereinafter, while stirring simultaneously by metering ratio by step 2)
Water-soluble resin prepolymer, alkoxy silane, remaining silane coupling agent are successively put into, 0.5~1h is stirred；
Step 3) is added wetting agent and defoaming agent into slurries, stirs after 0.5h with 1000 mesh filter screen filtering and dischargings to get Chrome-free
Aqueous electric steel insulating paint.
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