CN103897580A - Electrostatic spraying polyurethane varnish - Google Patents
Electrostatic spraying polyurethane varnish Download PDFInfo
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- CN103897580A CN103897580A CN201410088805.6A CN201410088805A CN103897580A CN 103897580 A CN103897580 A CN 103897580A CN 201410088805 A CN201410088805 A CN 201410088805A CN 103897580 A CN103897580 A CN 103897580A
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- polyurethane lacquer
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Abstract
The invention discloses an electrostatic spraying polyurethane varnish, comprising a primary agent and a diluent, wherein the primary agent comprises alkyd resin, diacetone alcohol, acetone, propylene glycol methyl ether acetate and a conductive agent; the diluent comprises propylene glycol methyl ether acetate, xylene, cyclohexanone, trimethylbenzene and a conductive agent. After the conductive agent is added, not only are excellent decorative and protective effects of the traditional PU dual-component furniture lacquer reserved, but also the resistance is reduced, the electrostatic spraying polyurethane varnish is applicable to electrostatic spraying, and especially, electrostatic spraying can be conveniently carried out on a complicated work-piece, so that the construction quality and the construction efficiency can be greatly improved.
Description
Technical field
The present invention relates to a kind of paint, relate in particular to a kind of electrostatic spraying polyurethane lacquer.
Background technology
Polyurethane paint is polyurethane(s) paint.Its paint film is tough, and gloss is plentiful, strong adhesion, water proof and wearable, erosion resistance.Be widely used in high-class woodenware furniture, also can be used for metallic surface.Polyurethane coating is divided into bicomponent polyurethane coating and one-can urethane coating.Bicomponent polyurethane coating is generally made up of isocyanate prepolymer (being also low molecule urethane polymer) and hydroxy-containing resin two portions, is commonly referred to curing agent component and host component.The general performance all with good mechanical property, higher solids content, each side is all relatively good.It is a current rising class coating variety.Main application direction has woodwork coating, automobile repairing paint, protective system, terrace paint, electronic paint, speciality coating etc.Chinese patent CN103468125A discloses a kind of polyurethane paint, comprises high hydroxyl alkyd resins, has the advantages such as paint film light is plentiful, hard wear resistant.Patent CN101585998A discloses a kind of polyurethane paint, is double-component polyurethane paint, has excellent sticking power.
At present, polyurethane paint adopts the forms of construction work such as spraying, roller coat more.The method that air gun sprays, air pressure is large, and workpiece surface is subject to larger pressure, and surface paint bounce-back is serious, causes paint painting rate lower, and coating is inhomogeneous, often needs repeatedly to spray, and efficiency is low, and waste is serious, and workpiece surface polishing workload is large.Adopt roller application, requiring to be coated with part is plane, is coated with part constructional difficulties large for abnormity.If can adopt electrostatic spraying to can solve the problems referred to above.
Electrostatic spraying is to utilize high pressure static electricity electric field to make electronegative paint particles along the contrary direction orientation movement of electric field, and paint particles is adsorbed on to a kind of spraying method of workpiece surface.The spray gun of electrostatic spraying or spray dish when work, spray cup, paint particles part connects negative pole, and workpiece connects anodal and ground connection, under the action of high voltage of high-voltage power supply, between the end of spray gun (or spray dish, spray cup) and workpiece, just forms an electrostatic field.The suffered electrical forces of paint particles is directly proportional to the voltage of electrostatic field and the carried charge of paint particles, and and distance between spray gun and workpiece be inversely proportional to, in the time that voltage is enough high, spray gun end near zone forms ionization of air district.Coating sprays after nozzle atomization, when at the edge of the utmost point pin of the paint particles being atomized by muzzle or spray dish, spray cup because contact is charged, when produce through corona discharge gas ionization zone time, will increase again its electric charge surface density.These electronegative paint particles, under electrostatic field, to the workpiece surface motion of heteropolarity, and are deposited over and on workpiece surface, form uniform film.
But conventional polyurethanes paint resistance is generally higher, can not be used in electrostatic spraying.
Summary of the invention
Higher for current high concentrations of toluene diisocyanate resistance, can not use the problem of electrostatic spraying, the invention provides a kind of polyurethane lacquer that can electrostatic spraying, by adding conductive agent to solve the higher problem of resistance.
The host of a kind of electrostatic spraying polyurethane lacquer provided by the invention, by weight ratio, component comprises:
Host:
Thinner:
The part by weight of described host and described thinner is (55.3-114): (45-156).
Preferably, the number-average molecular weight of described Synolac is 1000-10000.
Wherein, described Synolac oil content is 40～50%, is formed by the raw material condensation polymerization that comprises ricinolic acid, Tetra hydro Phthalic anhydride and polyvalent alcohol.
Preferably, described Synolac oil content is 44%.
Wherein, described conductive agent is selected from one or more the mixture in silane alcohol base ammonium salt, mixed valence tin-oxide, mixed valence molybdenum oxide.
Preferably, the host of described electrostatic spraying polyurethane lacquer also comprises the auxiliary agent of 0.1-3 part, preferably 0.5-2 part.
Wherein, described auxiliary agent can be selected from one or more in dispersion agent, anti-settling agent, siccative, toughner, defoamer, anti-skinning agent, flow agent, wetting agent, thickening material etc.
Wherein, described flow agent is preferably 0.4-0.8 part, is selected from one or more in acrylic acid esters co-polymer flow agent, organosilicon flow agent, modified polyacrylate flow agent.
Wherein, described defoamer is preferably 0.3-0.5 part, is selected from one or more in silicone based defoamer, mineral oil defoaming agent, polyethers defoamer, aliphatic alcohols defoamer, acrylate defoamer.
Wherein, described anti-settling agent is preferably 0.2-0.4 part, is preferably and is selected from aerosil, precipitated silica, wilkinite, polyamide wax, hydrogenated castor wet goods, most preferably is aerosil anti-settling agent.
Wherein, described dispersion agent is selected from one or more in triethyl hexyl phosphoric acid, sodium lauryl sulphate, methyl amyl alcohol, derivatived cellulose, polyacrylamide, guar gum, fatty acid polyglycol ester.
A kind of electrostatic spraying polyurethane lacquer of the present invention adds after conductive agent in component; reduce resistance; not only can retain good decoration and the protection effect of the two component furniture lacquers of conventional P U; also be applicable to electrostatic spraying; especially can on complex part, carry out easily electrostatic spraying, greatly improve construction quality and operating efficiency.
Embodiment
The invention provides a kind of host of electrostatic spraying polyurethane lacquer, by weight ratio, component comprises:
Host:
Thinner:
The weight proportion of described host and described thinner is (55.3-114): (50.1-155.5).
Preferably, the host of described electrostatic spraying polyurethane lacquer also comprises the auxiliary agent of 0.1-3 part, preferably 0.5-2 part, and described auxiliary agent comprises one or more in flow agent, defoamer, anti-settling agent.
Below by specific embodiment, the present invention is carried out to detailed and concrete introduction, to better understand the present invention, but following embodiment does not limit the scope of the invention.
Embodiment 1
In the present embodiment, a kind of host of electrostatic spraying polyurethane lacquer, component comprises:
A thinner for electrostatic spraying polyurethane lacquer, component comprises:
Embodiment 2
In the present embodiment, a kind of host of electrostatic spraying polyurethane lacquer, component comprises:
A thinner for electrostatic spraying polyurethane lacquer, component comprises:
Embodiment 3
In the present embodiment, a kind of host of electrostatic spraying polyurethane lacquer, component comprises:
A thinner for electrostatic spraying polyurethane lacquer, component comprises:
Embodiment 4
In the present embodiment, a kind of host of electrostatic spraying polyurethane lacquer, component comprises:
A thinner for electrostatic spraying polyurethane lacquer, component comprises:
Embodiment 5
In the present embodiment, a kind of host of electrostatic spraying polyurethane lacquer, component comprises:
A thinner for electrostatic spraying polyurethane lacquer, component comprises:
Electrostatic spraying polyurethane lacquer prepared by above-described embodiment; carry out after electrostatic spraying construction; test paint film property also compares with the polyurethane lacquer that above-described embodiment removes conductive agent; find that paint film does not all have notable difference at aspects such as hardness, sticking power, dry heat resistance and water tolerance; illustrate that the present invention is adding after conductive agent; good decoration and the protection effect of the two component furniture lacquers of conventional P U are not only retained; also reduce resistance; be applicable to electrostatic spraying, can greatly improve construction quality and operating efficiency.Testing standard adopts respectively GB/T6739-1996 test pencil hardness, adopts GB/T9286 test sticking power, adopts GB/T4893.3-1985 test dry heat resistance, adopts GB/T9274-1988 test water tolerance.
Above specific embodiments of the invention be have been described in detail, but it is just as example, the present invention is not restricted to specific embodiment described above.To those skilled in the art, any equivalent modifications that the present invention is carried out and alternative also all among category of the present invention.Therefore, equalization conversion and the modification done without departing from the spirit and scope of the invention, all should contain within the scope of the invention.
Claims (10)
1. an electrostatic spraying polyurethane lacquer, is characterized in that, comprises host and thinner;
Described host, by weight ratio, component comprises:
Described thinner, by weight ratio, component comprises:
The part by weight of described host and described thinner is (55.3-114): (45-156).
2. a kind of electrostatic spraying polyurethane lacquer according to claim 1, is characterized in that, the number-average molecular weight of described Synolac is 1000-10000.
3. a kind of electrostatic spraying polyurethane lacquer according to claim 1, is characterized in that, described Synolac oil content is 40～50%.
4. a kind of electrostatic spraying polyurethane lacquer according to claim 1, is characterized in that, described Synolac is formed by the raw material condensation polymerization that comprises ricinolic acid, Tetra hydro Phthalic anhydride and polyvalent alcohol.
5. a kind of electrostatic spraying polyurethane lacquer according to claim 1, is characterized in that, described conductive agent is selected from one or more the mixture in silane alcohol base ammonium salt, mixed valence tin-oxide, mixed valence molybdenum oxide.
6. a kind of electrostatic spraying polyurethane lacquer according to claim 1, is characterized in that, by weight ratio, described host also comprises the auxiliary agent of 0.1-3 part.
7. a kind of electrostatic spraying polyurethane lacquer according to claim 6, is characterized in that, described auxiliary agent is selected from one or more in dispersion agent, anti-settling agent, siccative, toughner, defoamer, anti-skinning agent, flow agent, wetting agent, thickening material etc.
8. a kind of electrostatic spraying polyurethane lacquer according to claim 7, is characterized in that, described flow agent is polyacrylate(s) flow agent.
9. a kind of electrostatic spraying polyurethane lacquer according to claim 7, it is characterized in that, described defoamer is selected from one or more in silicone based defoamer, mineral oil defoaming agent, polyethers defoamer, aliphatic alcohols defoamer, acrylate defoamer.
10. a kind of electrostatic spraying polyurethane lacquer according to claim 7, is characterized in that, described anti-settling agent is selected from one or more in aerosil, precipitated silica, wilkinite, polyamide wax, hydrogenated castor oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410088805.6A CN103897580B (en) | 2014-03-11 | 2014-03-11 | A kind of electrostatic spraying polyurethane lacquer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410088805.6A CN103897580B (en) | 2014-03-11 | 2014-03-11 | A kind of electrostatic spraying polyurethane lacquer |
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| Publication Number | Publication Date |
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| CN103897580A true CN103897580A (en) | 2014-07-02 |
| CN103897580B CN103897580B (en) | 2016-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410088805.6A Active CN103897580B (en) | 2014-03-11 | 2014-03-11 | A kind of electrostatic spraying polyurethane lacquer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104946121A (en) * | 2015-06-30 | 2015-09-30 | 广东花王涂料有限公司 | PU (polyurethane) matt finish varnish and preparation method thereof |
| CN105885696A (en) * | 2016-05-04 | 2016-08-24 | 太仓吉达喷涂有限公司 | Aqueous coating for electrostatic spraying |
| CN108043729A (en) * | 2017-12-11 | 2018-05-18 | 界首市金龙机械设备有限公司 | A kind of corn screening machine |
| CN108117823A (en) * | 2017-12-11 | 2018-06-05 | 界首市金龙机械设备有限公司 | A kind of casing coating of corn screening machine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1640970A (en) * | 2004-02-26 | 2005-07-20 | 深圳市展辰达化工有限公司 | Polyurethane termite-proof insect-protected enclosed primping paint |
| CN102020916A (en) * | 2010-12-14 | 2011-04-20 | 惠州市长润发涂料有限公司 | Nitrocellulose varnish and preparation method thereof |
| CN102382564A (en) * | 2011-09-01 | 2012-03-21 | 立邦涂料(成都)有限公司 | Polyurethane matt woodenware paint |
| CN103602235A (en) * | 2013-11-12 | 2014-02-26 | 惠州市长润发涂料有限公司 | PU (Polyurethane) quick-drying electrostatic spraying paint |
-
2014
- 2014-03-11 CN CN201410088805.6A patent/CN103897580B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1640970A (en) * | 2004-02-26 | 2005-07-20 | 深圳市展辰达化工有限公司 | Polyurethane termite-proof insect-protected enclosed primping paint |
| CN102020916A (en) * | 2010-12-14 | 2011-04-20 | 惠州市长润发涂料有限公司 | Nitrocellulose varnish and preparation method thereof |
| CN102382564A (en) * | 2011-09-01 | 2012-03-21 | 立邦涂料(成都)有限公司 | Polyurethane matt woodenware paint |
| CN103602235A (en) * | 2013-11-12 | 2014-02-26 | 惠州市长润发涂料有限公司 | PU (Polyurethane) quick-drying electrostatic spraying paint |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104946121A (en) * | 2015-06-30 | 2015-09-30 | 广东花王涂料有限公司 | PU (polyurethane) matt finish varnish and preparation method thereof |
| CN104946121B (en) * | 2015-06-30 | 2017-07-04 | 广东花王涂料有限公司 | PU matte top-coat paint and preparation method thereof |
| CN105885696A (en) * | 2016-05-04 | 2016-08-24 | 太仓吉达喷涂有限公司 | Aqueous coating for electrostatic spraying |
| CN108043729A (en) * | 2017-12-11 | 2018-05-18 | 界首市金龙机械设备有限公司 | A kind of corn screening machine |
| CN108117823A (en) * | 2017-12-11 | 2018-06-05 | 界首市金龙机械设备有限公司 | A kind of casing coating of corn screening machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103897580B (en) | 2016-11-23 |
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Address after: 201506 No. 578 Xia Sheng Road, Jinshan District, Shanghai Patentee after: Shanghai Libang Changrunfa Coatings Co., Ltd. Address before: 201506 No. 578 Xia Sheng Road, Jinshan District, Shanghai Patentee before: Shanghai Changrunfa Paint Co., Ltd. |