CN1324902A - Aqueous silicon steel sheet paint - Google Patents
Aqueous silicon steel sheet paint Download PDFInfo
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- CN1324902A CN1324902A CN 00114587 CN00114587A CN1324902A CN 1324902 A CN1324902 A CN 1324902A CN 00114587 CN00114587 CN 00114587 CN 00114587 A CN00114587 A CN 00114587A CN 1324902 A CN1324902 A CN 1324902A
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Abstract
A water paint for silicon-steel sheet is comprised of 20-80% of bonding agent, 5-40% of inorganic pigment, 0-15% of adjuvant and 5-75% of water and water-soluble organic solvent, in which the bonding agent is formed from marketable water acrylic resin, water amino resin and water silicone resin according to a certain proportion. This invented paint contains no harmful components of chromate, etc. and is safe in use and possesses excellent insulating property, its surface is smooth and bright, water-proof, rust-resistant and high-temp. resistant, and its adhesive force meets the requirement of coat for silicon-steel sheet, and its production method is simple.
Description
The present invention relates to coating, refer to a kind of aqueous coating for silicon-steel sheet particularly.
Siliconized plate is in the Rolling Production process, need carry out top coat, this coating requires that excellent electric insulating matter is arranged, and will meet siliconized plate required every requirement in making various electric equipment products simultaneously, handles (about 750 ℃), shock-resistant, surface hardness, solvent resistance etc. as the high temperature flange.The continuously quick roller coat of the many employings of siliconized plate Rolling Production simultaneously, baking exsiccant technology requires coating 240~340 ℃ of following 60 seconds inner drying film forming under high-temperature.And existing coating for silicon-steel sheet roughly divides two types: a class is the organic varnish class, as the silicon steel sheet insulating lacquer, sees " coating process " (revised and enlarged edition) of Jiang Yingtao chief editor, and Chemical Industry Press's in June, 1992 first version, this coating are solvent with dimethylbenzene; Similarly also have electric insulation dip varnish without solvent, wherein contain a large amount of vinylbenzene, see Chinese patent CN1097785A for details.Second class is the water-borne coatings that contains the chromium metal salt compound, and the refractory coating liquid as forming on the oriented silicon steel sheet promptly contains the chromium metal-salt, at United States Patent (USP) 4, play-by-play is arranged in 238,534, and the electrical sheet insulation compound that the clear 54-24233 of day disclosure special permission communique is put down in writing also belongs to this type of.(project year numbers: 87205781), be used with zinc chromate and the inorganic liquid of zinc borate, stability has only three days to the non orientating silicon steel coating of collecting in the Chinese science and technology achievement storehouse with ACRYLIC EMULSION.More than all contain toxic substance in the two class coating, as toluene, chromium metallic salt, they can cause serious pollution to living environment and operating environment, even can bring out cancer.
Purpose of the present invention will provide a kind of exactly and not contain toxic substance such as chromic salt, and performances such as the electrical insulation capability of coating, surface-brightening performance, water resistance, antirust, high temperature resistant, sticking power all meet the aqueous coating for silicon-steel sheet of the specification of quality of siliconized plate when making.
For achieving the above object, the aqueous coating for silicon-steel sheet that the present invention developed is made up of four kinds of components.First kind of component is the caking agent component, is the main film forming substance as coating, and this component is made up of following three kinds of macromolecule resins again:
A. water-borne acrylic resin: this resin can be that commercially available various content are the vinylformic acid of 30~70% aqueous solution type, aqueous emulsion type or aqueous dispersion type and the homopolymer and the multipolymer of ester thereof, used polymer monomer can be vinylformic acid and ester, methacrylic acid and ester thereof, other class polymerisable monomer vinylbenzene, vinyl acetate, acrylamide, vinyl cyanide, maleic anhydride, fumaric acid etc., get wherein one or more, the consumption of this resin is 20~80% of a caking agent component gross weight.
B. water-compatible amino resin: this resin can be that commercially available various solid contents are 40~100% the water-soluble or water-dispersible terpolycyantoamino-formaldehyde resin or the terpolycyantoamino-formaldehyde resin of copolymerization structure, get wherein one or more, the consumption of this resin is 10~70% of a caking agent component gross weight.
C. waterborne organic silicon resin: this resin is that commercially available various solid contents are silicone resin, the organic-silicon-modified resin of crosslinkable functionalities such as the hydroxyl, carboxyl of 20~70% aqueous solution type, aqueous emulsion type or aqueous dispersion type, get wherein one or more, the consumption of this resin is 10~70% of a caking agent component gross weight.
The consumption that first kind of component is the caking agent component accounts for 20~80% of coating gross weight, and consumption too much can make hardness of paint film descend the rustless property variation.Consumption crosses that I haven't seen you for ages makes paint film adhesion descend surface brightness and planarization variation.
Second kind of component is the mineral dye component, this component comprises that median size is at various inorganic coloring pigment and inorganic pigment extender below 10 microns, it can be titanium dioxide, ground barium sulfate, one or more the mixtures in the mineral dyes such as kaolin, mica powder, lime carbonate, talcum powder, process white, magnesium oxide in any ratio.The consumption of this component accounts for 5~40% of coating gross weight, and consumption is very few, can cause the paint film resistance to elevated temperatures to descend, and consumption too much can make the surface luster of paint film and planarization degenerate.
The third component is the auxiliary agent component, this component can be commercially available various defoamer, pigment dispersing agent, the rheological improving agents that are used for water-borne coatings, in thickening material, moistened surface agent, water quality stabilizer, the antifreezing agent one or more can be silicone or non-silicone, ionic species or nonionic class or ester class, acids, ethers, alcohols, pure ether compound on structure type.The consumption of this component can add as required, generally adds consumption and accounts for 0~15% of coating gross weight.
The 4th kind of component is water and water-miscible organic solvent component, and the water in this component is meant the deionized water that obtains by the whole bag of tricks, and water-miscible organic solvent is meant: the ethanol of unary alcohol, n-propyl alcohol, Virahol; The ethylene glycol of di-alcohols, glycol ether, Triethylene glycol; Methyl glycol, glycol monoethyl ether, ethylene glycol monobutyl ether, propylene glycol monomethyl ether, Diethylene Glycol one ether, Diethylene Glycol monobutyl ether, dipropylene glycol monomethyl ether, dipropylene glycol one ether, the dipropylene glycol monobutyl ether of alcohol ethers.Above-mentioned water and water-miscible organic solvent can select for use one or more by any mixed, and its consumption can add according to the range of viscosities that coating requires, and accounts for 5~75% of coating gross weight.This component consumption is very few, and dope viscosity is too high, causes constructional difficulties, the too much dope viscosity of consumption is low excessively, can cause film thickness on the low side, and performance does not reach requirement, the general requirement dope viscosity is controlled at and is coated with between No. 4 cups 15 seconds to 95 seconds, can adjust with the consumption of this component.
First component of above-mentioned aqueous coating for silicon-steel sheet is in the binding agent component, and the preferable by weight proportioning of each composition is:
Solid content is 30~70% water-borne acrylic resin: 30~60%
Solid content is 40~100% the amino resin of water-based: 15~50%
Solid content is 20~70% waterborne organic silicon resin: 20~50%.
First component of above-mentioned aqueous coating for silicon-steel sheet is in the binding agent component, and the best by weight proportioning of each composition is:
Solid content is 50% water-borne acrylic resin: 35~50%
Solid content is 50% water-compatible amino resin: 15~35%
Solid content is 50% waterborne organic silicon resin: 25~40%.
The consumption of aqueous acroleic acid resin is crossed that I haven't seen you for ages the film-forming properties of coating is caused bad influence, can not obtain the smooth paint film of light; Consumption is crossed the water tolerance variation that can make paint film at most.The consumption of water-compatible amino resin crosses that I haven't seen you for ages makes film curing incomplete, prolongs set time, and causes paint film character inferior; Consumption is crossed and can be made hardness of paint film excessive at most, and paint film becomes fragile, and toughness reduces.The consumption of waterborne organic silicon resin crosses that I haven't seen you for ages makes the resistance to elevated temperatures of paint film not good; Consumption is crossed the toughness that can make paint film at most and is reduced.Aqueous coating for silicon-steel sheet of the present invention has been taken all factors into consideration the wherein consumption and the proportioning of each component, and it is reasonable to make it to be tending towards to greatest extent.
The invention has the advantages that: institute's coatings formulated does not contain chromic salt and other toxic substances, can not pollute environment, and is safe and reliable.The coating that is obtained has excellent electrical insulating property, and surface-brightening is smooth, in water tolerance, all satisfies the specification of quality of siliconized plate as purposes such as motor, transformers on the performances such as antirust, high temperature resistant, sticking power.Simultaneously this coating is easily manufactured, and raw material is easy to get, and can use general paint production plant at present, and each component can mix by any order, and further being uniformly dispersed through homogenizer or sand mill gets final product.Gained coating is suitable for continuous roller coat, can certainly be used for other constructional method, and as brushing, spraying, dip-coating, flow coat etc., dry under 240~340 ℃ of temperature, be 25 seconds to 60 seconds time of drying.
The present invention is described in further detail below in conjunction with embodiment:
Embodiment 1: at volume is in the mixing kettle of 500L, the adding solid content is 50% water-borne acrylic resin 50kg, solid content is 50% water-compatible amino resin 40kg, solid content is 50% waterborne organic silicon resin 40kg, mix, add kaolin 10kg, talcum powder 30kg mixes, add entry 30kg simultaneously, n-propyl alcohol 15kg, butyl glycol ether 40kg mixes, add defoamer 0.5kg, pigment dispersing agent 0.5kg mixes after sand mill obtains the even aqueous liquid dispersion 256kg of particle diameter below 10 μ m, and viscosity is 45s (coating-No. 4 cup).Gained coating connects in the coating device at the silicon steel tandem rolling and uses, and is 600 ℃ in furnace temperature, under 280 ℃ of the plate surface temperatures, steel disc translational speed 60m/min, time of drying 45s.It is smooth to obtain the paint film light, thickness 1.2 μ m, and interlamination resistance is worth 1600 Ω, and sticking power, rust-preventing characteristic etc. all meets the coating of siliconized plate processing and article of manufacture requirement.
Embodiment 2: identical with embodiment 1 method, the adding solid content is 50% water-borne acrylic resin 70kg in mixing kettle, solid content is 50% water-compatible amino resin 30kg, solid content is 50% waterborne organic silicon resin 60kg, mix, add the kaolin 25kg of flat footpath particle diameter below 5 μ m, the talcum powder 20kg of flat footpath particle diameter below 5 μ m adds entry 60kg, ethylene glycol 10kg, ethylene glycol monobutyl ether 60kg, disperse with homogenizer, add pigment dispersing agent 0.5kg simultaneously, defoamer 0.5kg, stir and to obtain uniform aqueous dispersions 336kg after 30 minutes, viscosity 25s (coating-No. 4 cup).Gained coating is constructed under example 1 the same terms, time of drying 45s, it is smooth to obtain the paint film light, thickness 0.8 μ m, interlamination resistance 1200 Ω, all other performances all meet the coating of siliconized plate processing and article of manufacture requirement.
Claims (7)
1. an aqueous coating for silicon-steel sheet is made up of four kinds of components, and each component is by weight ratio:
Binding agent component: 20~80%
Mineral dye component: 5~40%
Auxiliary agent component: 0~15%
Water and water-miscible organic solvent component: 5~75% wherein the binding agent component form by three kinds of compositions again, each composition is by weight ratio:
Solid content is 30~70% water-borne acrylic resin: 20~80%
Solid content is 40~100% water-compatible amino resin: 10~70%
Solid content is 20~70% waterborne organic silicon resin: 10~70%.
2. aqueous coating for silicon-steel sheet according to claim 1 is characterized in that: each composition of said binding agent component is by weight ratio:
Solid content is 30~70% water-borne acrylic resin: 30~60%
Solid content is 40~100% water-compatible amino resin: 15~50%
Solid content is 20~70% waterborne organic silicon resin: 20~50%.
3. aqueous coating for silicon-steel sheet according to claim 1 is characterized in that: each composition of said binding agent component is by weight ratio:
Solid content is 50% water-borne acrylic resin: 35~50%
Solid content is 50% water-compatible amino resin: 15~35%
Solid content is 50% waterborne organic silicon resin: 25~40%.
4. according to claim 1 or 2 or 3 described aqueous coating for silicon-steel sheet, it is characterized in that: in the said binding agent component:
Water-borne acrylic resin is the vinylformic acid of commercially available various aqueous solution types, aqueous emulsion type or aqueous dispersion type and the homopolymer and the multipolymer of ester thereof, used polymer monomer can be vinylformic acid and ester, methacrylic acid and ester thereof, other class polymerisable monomer vinylbenzene, vinyl acetate, acrylamide, vinyl cyanide, maleic anhydride, fumaric acid are got wherein one or more;
Water-compatible amino resin be the melamine of commercially available various water-soluble or water-dispersible terpolycyantoamino-formaldehyde resin or copolymerization structure by formaldehyde resin, get wherein one or more;
The waterborne organic silicon resin is silicone resin, the organic-silicon-modified resin of crosslinkable functionalities such as the hydroxyl, carboxyl of commercially available various aqueous solution types, aqueous emulsion type or aqueous dispersion type, gets wherein one or more.
5. according to claim 1 or 2 or 3 described aqueous coating for silicon-steel sheet, it is characterized in that: said mineral dye component is that median size is at various inorganic coloring pigment and inorganic pigment extender below 10 microns, it can be titanium dioxide, ground barium sulfate, one or more the mixtures in the mineral dyes such as kaolin, mica powder, lime carbonate, talcum powder, process white, magnesium oxide in any ratio.
6. according to claim 1 or 2 or 3 described aqueous coating for silicon-steel sheet, it is characterized in that: said auxiliary agent component is one or more of the commercially available various defoamer that is used for water-borne coatings, pigment dispersing agent, rheological improving agent, thickening material, moistened surface agent, water quality stabilizer, antifreezing agent, can be silicone or non-silicone, ionic species or nonionic class or ester class, acids, ethers, alcohols, pure ether compound on the structure type.
7. according to claim 1 or 2 or 3 described aqueous coating for silicon-steel sheet, it is characterized in that: the water in said water and the water-miscible organic solvent component refers to deionized water; Water-miscible organic solvent refers to ethanol, n-propyl alcohol, the Virahol of unary alcohol; The ethylene glycol of di-alcohols, glycol ether, Triethylene glycol; Methyl glycol, glycol monoethyl ether, ethylene glycol monobutyl ether, propylene glycol monomethyl ether, Diethylene Glycol one ether, Diethylene Glycol monobutyl ether, dipropylene glycol monomethyl ether, dipropylene glycol one ether, the dipropylene glycol monobutyl ether of alcohol ethers; Above-mentioned water and water-miscible organic solvent can select for use one or more by any mixed.
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CNB001145878A CN1152934C (en) | 2000-05-24 | 2000-05-24 | Aqueous silicon steel sheet paint |
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CNB001145878A CN1152934C (en) | 2000-05-24 | 2000-05-24 | Aqueous silicon steel sheet paint |
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