CN101914344B - Non-chrome water-based organic fingerprint-resistant coating and preparation method thereof - Google Patents
Non-chrome water-based organic fingerprint-resistant coating and preparation method thereof Download PDFInfo
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- CN101914344B CN101914344B CN 201010277648 CN201010277648A CN101914344B CN 101914344 B CN101914344 B CN 101914344B CN 201010277648 CN201010277648 CN 201010277648 CN 201010277648 A CN201010277648 A CN 201010277648A CN 101914344 B CN101914344 B CN 101914344B
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Abstract
The invention discloses non-chrome water-based organic fingerprint-resistant coating, which comprises the following components in part by mass: 15 to 25 parts of water-based resin, 25 to 65 parts of deionized water, 1 to 2 parts of film-forming aid, 5 to 10 parts of lubricating aid, 5 to 15 parts of silane coupling agent, and 10 to 20 parts of silica sol. Correspondingly, the invention also discloses a method for preparing the non-chrome water-based organic fingerprint-resistant coating, which comprises the following steps of: adding deionized water into a reaction kettle at normal temperature; adding a film-forming aid into the reaction kettle; heating the mixture to the temperature of between 55 and 60 DEG C, adding the water-based resin, and stirring for 1.5 to 2 hours; keeping the temperature, adding the silica sol, and stirring for 0.5 to 0.75 hour; keeping the temperature, adding the silane coupling agent, and stirring for 0.5 to 0.75 hour; cooling to the temperature of between 40 and 45 DEG C, adding the lubricating aid, and stirring for 0.5 to 0.75 hour; and cooling to normal temperature, adding the ionized water once again, and stirring for 2 to 2.5 hours.
Description
Technical field
The present invention relates to a kind of coating composition and preparation method thereof, relate in particular to a kind of fingerprint-resistant coating and preparation method thereof.
Background technology
Fingerprint-proof plate is to carry out a kind of compound coating plate of obtaining after anti-fingerprint is handled on the galvanized sheet surface.
Anti-finger print steel plate is the material through environmental certification the earliest, because of the surface can not stay fingerprint with clean finger touch, so gain the name " anti-fingerprint ", anti-finger print steel plate any surface finish, smooth, tolerance is little.
The research and the production of fingerprint-proof plate originate from Japan, get into commercialization production at the initial stage eighties.It is in order to satisfy user's in the field of household appliances requirement that anti-fingerprint is handled initial purpose.In the household electrical appliances production process, because operation needs, many parts repeatedly touch through the workman, and workman's sweat stain on hand will form pollution at piece surface, influence attractive in appearancely, have researched and developed fingerprint-proof plate thus.
It is on zinc-plated chromate passivation film, to form the inorganic series membranes of one deck that initial anti-fingerprint is handled, and is generally silicate films, makes surface of steel plate have anti-finger printing thus.In recent years, the user has higher requirement to the coating product, in anti-finger printing, also requires ground connection property, higher anti-finger printing and coating performance.Developed the paint sheet that on steel plate galvanized chromic salt epithelium, forms the film-type organic hybrid films thus.Organic type is different with the performance of two kinds of anti-finger print steel plates of inorganic type, and the solidity to corrosion and the ground connection property of organic type anti-finger print steel plate are better than inorganic type anti-finger print steel plate, but the anti-finger printing index is weaker.But the solidity to corrosion of these two kinds of anti-finger print steel plates can both satisfy the requirement of household electric appliances.
Main application with thin steel plate with organic coating of anti-finger printing is the inner and outer plates of various household appliances, and domestic what at present fingerprint-proof plate is had the call is the computer housing production.
Anti-fingerprint technology began at first to be developed by Japan from the eighties in 20th century, experienced from contain chromium (VI) organic solvent type, contain chromium (VI) water-base resin type, the development course of the non-chrome water-based pair of component, non-chrome water-based single-component.
Summary of the invention
The purpose of this invention is to provide a kind of non-chrome water-based organic fingerprint-resistant coating and preparation method thereof; It is through suitable set of dispense ratio and be aided with suitable ME; Make not containing metal chromium of this water-based fingerprint-resistant coating; And have superior corrosion resistance ability, anti-finger printing, alkali resistance and coating, the preparation technology of this coating is simple simultaneously.
According to above-mentioned purpose of the present invention, the present invention proposes a kind of non-chrome water-based organic fingerprint-resistant coating, the mass fraction proportioning of its each component is:
Water-base resin 15-25 part;
Deionized water 25-65 part;
Film coalescence aid 1-2 part;
Lubricating auxiliary agent 5-10 part;
Silane coupling agent 5-15 part;
Silicon sol 10-20 part.
Preferably, said water-base resin is an aqueous polyurethane, and said aqueous polyurethane has " NH-COO-" structure.
Aqueous polyurethane is to be that dispersion medium, organic macromolecule urethane disperse to form transparent or opaque emulsion liquid with water in water.Therefore, aqueous polyurethane is liquid, also is that in the coatings industry is main kind of usually.Behind the aqueous polyurethane drying and forming-film, form the different elastomerics of performance, be fit to the needs in the differing materials industry, its film forming properties is good, strong covering power, bonding are firm, and the physicals of coating is excellent, can improve each item performance of epithelium greatly.Aqueous polyurethane is solvent with water, and is pollution-free, safe and reliable, mechanical property is good, consistency good, be easy to advantages such as modification.
Because this patent product application is handled in surface of steel plate; Coating need be passed through punching press, baking, and with respect to vinyl resin and epoxy resin, the advantage of urethane is its excellent mechanical; The epithelium elongation at break is big, snappiness and ductility are good, epithelium difficult drop-off after the punching press.Stronger resistance toheat is also arranged simultaneously.Therefore, the contriver chooses aqueous polyurethane in the present technique scheme.
Preferably, said de-ionized electrical conductivity of water≤5 μ s/cm.
Because the present technique scheme has higher requirement for the antiseptic property of coating, so the contriver finds that through overtesting the deionized water of industrial tap water zero(ppm) water and specific conductivity＞5 μ s/cm all can not realize performance requriements of the present invention.
Preferably, the particle size range of said silicon sol is 20nm-30nm.
Silicon solution is when drying out; Monomer silicic acid aggregates into height gradually and gathers silica gel; With the evaporation of moisture, the colloid molecule increases, and formation-SIO-O-SIO-films at last: IO-SI-OH+HO-SI-OH is low because of the content of NA2O in silicon sol; Silicon sol has a certain amount of film forming dissolved characteristic, and its water tolerance, resistance toheat obviously are superior to organic coating.The densification and harder of filming does not produce static, and various dust are difficult in the air adheres to, and its contamination resistance is stronger simultaneously.Because the silicon sol particle diameter is more little, the stability of solution is high more, and film forming properties is good more simultaneously, and therefore for the present technique scheme, the contriver selects the silicon sol of 20nm-30nm scope for use through the checking of a large amount of tests.
Preferably, said film coalescence aid is an alcohol ester 12.
The interpolation of film coalescence aid can be lowered into film temperature effectively, improves the paint film scrub resistance, improves the pigment homogeneity, has good color developing, improves paint film adhesion, reduces Alligatoring, peels off.And alcohol ester 12 not hydrolysis in general alkaline medium has good preservation stability, and is lower in temperature, under the bigger mal-condition of humidity, still has film forming properties preferably.
Preferably, said lubricating auxiliary agent is a water-based cationic-nonionic oxidated polyethylene wax wax slurry.
Water-based nonionic high-density OPE wax slurry has excellent antifraying property and wear resisting property, and its fusing point is high, and hardness is big, has extraordinary alcohol resistance, can increase oilness, the water-repellancy of coating.For the present technique scheme; If the particle diameter of water-based nonionic high-density OPE can cause the particle come-up less than 1um; Descend with the ground bonding force, cause lubricity to descend, the particle diameter of the water-based nonionic high-density OPE of therefore selecting for use is between 1-2um.
Preferably, said silane coupling agent is γ-glycidyl ether oxygen propyl trimethoxy silicane.
In the group of two types of performance inequalities of silane coupling agent, most important with the γ group, it directly determines the effect of silane coupling agent.Have only when the γ group can react with corresponding matrix resin, could improve the bonding strength of organic adhesion agent.General want the γ group to mix with resin and can play linked reaction, what select for use owing to the present technique scheme is aqueous polyurethane, so must select to contain the silane coupling agent of suitable γ group.γ-glycidyl ether oxygen propyl trimethoxy silicane is a kind of coupling agent of the γ of containing group; The caulk compound and the sealer that are used for polysulfide and urethane are used for tackiness agent, filled or enhancement type thermosetting resin, the spun glass tackiness agent of epoxy resin and are used for inorganics filled or glass enhanced thermoplastic resin etc.In the present technique scheme, it is used to improve the cohesive force between urethane epithelium and the matrix (zinc coating), can react with inorganic and organic material through the molecule two ends, serves as a connection
Correspondingly, the present invention also provides the preparation method of said non-chrome water-based organic fingerprint-resistant coating, carries out according to the following step successively: in reaction kettle, add deionized water under the normal temperature condition; Add film coalescence aid then; Be warming up to 55-60 ℃, add water-base resin, stir 1.5-2h; Holding temperature is constant, then adds silicon sol, stirs 0.5-0.75h; Holding temperature is constant, adds silane coupling agent, stirs 0.5-0.75h; Be cooled to 40-45 ℃ then, add lubricating auxiliary agent, stir 0.5-0.75h; Be cooled to normal temperature, add deionized water once more, stir 2-2.5h.
Embodiment
Embodiment 1-5
Make non-chrome water-based organic fingerprint-resistant coating of the present invention according to the following step: in reaction kettle, add deionized water under the normal temperature condition; Add film coalescence aid then; Be warming up to 55-60 ℃, add water-base resin, stir 1.5-2h; Holding temperature is constant, then adds silicon sol, stirs 0.5-0.75h; Holding temperature is constant, adds silane, stirs 0.5-0.75h; Be cooled to 40-45 ℃ then, add lubricating auxiliary agent, stir 0.5-0.75h; Be cooled to normal temperature, add deionized water once more, stir 2-2.5h.The set of dispense of controlling coating among each embodiment is than as shown in table 1.
Table 1 (mass fraction)
| Component | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 |
| Deionized water | 50 | 30 | 62 | 52 | 42 |
| Alcohol ester 12 (film coalescence aid) | 1 | 2 | 2 | 1 | 1 |
| Aqueous polyurethane (water-base resin) | 16 | 25 | 15 | 18 | 22 |
| Silane coupling agent | 10 | 15 | 6 | 12 | 8 |
| Silicon sol | 11 | 20 | 15 | 16 | 17 |
| Aqueous emulsifying wax (lubricating auxiliary agent) | 10 | 8 | 6 | 5 | 10 |
Need be appreciated that, among the embodiment 1-5, the de-ionized electrical conductivity of water all≤5 μ s/cm, the particle size range of silicon sol is 20nm-30nm.
Table 2 is the preparation technology parameter of each coating among the embodiment of the invention 1-5.
Table 2
Applying coating among above-mentioned each embodiment on steel plate, is detected its performance.
Wherein, According to the following step with the applying coating described in the embodiment 1-3 on hot-dip galvanizing sheet steel: get a 210mm * 150mm * 0.5mm hot-dip galvanizing sheet steel; Through degreasing → washing → pure water wash → dry up → be coated with coating → oven dry (120 ℃ of bake out temperatures) → naturally cooling among the embodiment 1-3; Do Performance Detection then, detected result is as shown in table 3.
According to the following step with embodiment 4, the applying coating described in 5 on electrogalvanizing steel plate: get a 210mm * 150mm * 0.5mm electrogalvanizing steel plate; Through degreasing → washing → pure water wash → dry up → be coated with coating → oven dry (120 ℃ of the bake out temperatures among the embodiment 4-5; Time 60s) → naturally cooling; Do Performance Detection then, detected result is as shown in table 4.
Table 3
Table 4
Can be found out by table 3 and table 4 no matter which kind of steel plate non-chrome water-based organic fingerprint-resistant coating of the present invention is coated on, it all has outstanding corrosion resistance nature and anti-finger printing ability.
Be noted that above enumerate be merely specific embodiment of the present invention, obviously the invention is not restricted to above embodiment, many similar variations are arranged thereupon.If those skilled in the art all should belong to protection scope of the present invention from all distortion that content disclosed by the invention directly derives or associates.
Claims (7)
1. the preparation method of a non-chrome water-based organic fingerprint-resistant coating is characterized in that, carries out according to the following step successively: in reaction kettle, add deionized water under the normal temperature condition; Add film coalescence aid 1-2 part then; Be warming up to 55-60 ℃, add water-base resin 15-25 part, stir 1.5-2h; Holding temperature is constant, then adds silicon sol 10-20 part, stirs 0.5-0.75h; Holding temperature is constant, adds silane coupling agent 5-15 part, stirs 0.5-0.75h; Be cooled to 40-45 ℃ then, add lubricating auxiliary agent 5-10 part, stir 0.5-0.75h; Be cooled to normal temperature, add deionized water once more, stir 2-2.5h, add deionized water 25-65 part altogether twice.
2. the preparation method of non-chrome water-based organic fingerprint-resistant coating as claimed in claim 1 is characterized in that, said water-base resin is an aqueous polyurethane, and said aqueous polyurethane has " NH-COO-" structure.
3. the preparation method of non-chrome water-based organic fingerprint-resistant coating as claimed in claim 1 is characterized in that, said de-ionized electrical conductivity of water≤5 μ s/cm.
4. the preparation method of non-chrome water-based organic fingerprint-resistant coating as claimed in claim 1 is characterized in that, the particle size range of said silicon sol is 20nm-30nm.
5. like the preparation method of any described non-chrome water-based organic fingerprint-resistant coating among the claim 1-4, it is characterized in that said film coalescence aid is an alcohol ester 12.
6. like the preparation method of any described non-chrome water-based organic fingerprint-resistant coating among the claim 1-4, it is characterized in that said lubricating auxiliary agent is a water-based cationic-nonionic oxidated polyethylene wax wax slurry, the particle diameter of water-based cationic-nonionic oxidated polyethylene wax is 1-2 μ m.
7. like the preparation method of any described non-chrome water-based organic fingerprint-resistant coating among the claim 1-4, it is characterized in that said silane coupling agent is γ-glycidyl ether oxygen propyl trimethoxy silicane.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102070966B (en) * | 2011-01-14 | 2013-07-10 | 东南大学 | Organic and inorganic mixed fingerprint-resistance coating and preparation method thereof |
| CN103923560B (en) * | 2014-04-30 | 2016-04-06 | 武汉迪赛新材料有限公司 | A kind of water-based plate close agent and preparation method thereof |
| CN108129971B (en) * | 2017-12-27 | 2020-12-15 | 中山大学 | Environment-friendly fingerprint-resistant scratch-resistant coating of film substrate and application method thereof |
| CN108410291A (en) * | 2018-02-09 | 2018-08-17 | 合肥聚合工贸有限公司 | A kind of leather resistance and fingerprint resistance coating |
| CN114231109A (en) * | 2021-12-20 | 2022-03-25 | 蓝帆新材料技术(广州)有限公司 | Water-based fingerprint-resistant coating with interpenetrating network structure for galvanized steel sheet |
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| CN1311063A (en) * | 2000-02-28 | 2001-09-05 | 日本巴可莱新株式会社 | Metallic plate material having excellent propoerties such as: corrosion-resistant, coating, anti-finger printing and processing, and mfg. process therefor |
| CN101121860A (en) * | 2007-09-07 | 2008-02-13 | 江苏兰陵高分子材料有限公司 | Chromium-free fingerprint-resistant coating |
| CN101284944A (en) * | 2007-04-09 | 2008-10-15 | 日本油漆株式会社 | Galvanized fingerprint resistant light-cured combination, galvanized fingerprint resistant film and optical display device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1311063A (en) * | 2000-02-28 | 2001-09-05 | 日本巴可莱新株式会社 | Metallic plate material having excellent propoerties such as: corrosion-resistant, coating, anti-finger printing and processing, and mfg. process therefor |
| CN101284944A (en) * | 2007-04-09 | 2008-10-15 | 日本油漆株式会社 | Galvanized fingerprint resistant light-cured combination, galvanized fingerprint resistant film and optical display device |
| CN101121860A (en) * | 2007-09-07 | 2008-02-13 | 江苏兰陵高分子材料有限公司 | Chromium-free fingerprint-resistant coating |
Non-Patent Citations (1)
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| 于武刚等.纳米SiO_2对热镀锌钢板耐指纹涂层性能的影响研究.《材料保护》.2007,第40卷(第11期),第56-58、73页. * |
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