CN105440927A - Preparation method of quick-dry scratch-resistant water-borne wood coating - Google Patents
Preparation method of quick-dry scratch-resistant water-borne wood coating Download PDFInfo
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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
- 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/08—Oxygen-containing 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
- C09D7/60—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
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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Abstract
The invention provides a preparation method of a quick-dry scratch-resistant water-borne wood coating. The selectivity of different top and bottom coating film layers is improved by a calcium sulfate whisker and particle filler tonsure combined application technique, so the scratch-resistant property of a single-component water-borne polyurethane wood coating is improved, and the drying time of the coating film is accelerated. The preparation method comprises the following steps of performing hydrothermal reaction on calcium ions, sulfate radicals, CTAB (cetyl trimethyl ammonium bromide) and water; centrifuging at high speed to obtain whiskers with smaller long diameter as a bottom coating filler; centrifuging to obtain a supernatant as a base liquid, using a whisker micronucleus as an inducing crystal, supplementing the sulfate ions, and performing secondary hydrothermal reaction to obtain whiskers with larger long diameter as a top coating filler, wherein the hardness of the obtained coating film is 2H. The preparation method has the advantages that the defects of poor scratch-resistant property and low drying speed of the single-component water-borne wood paint are overcome, and a new technology is developed for the water-borne wood paint with low cost.
Description
Technical field
The present invention relates to technical field of aqueous paint, more particularly, the present invention relates to the preparation method of the anti-scratch water-borne wood coating of a kind of quick-drying.
Background technology
Along with environmental requirement is more and more stricter, the research and development of water-borne coatings, produce and apply the significant concern direction becoming coating industry.Wood furniture and woodenware home decoration material are due to closely bound up with people's daily life, and in its use procedure, whether environmental protection has direct impact to healthy.Conventional oil-based woodwork coating uses Tianna solution as solvent in a large number, and content is greater than 20%, very serious to the actual bodily harm of workman in the coating process that wherein benzene homologues such as toluene, dimethylbenzene is produced at woodenware.In addition, the volatilization of a large amount of oil paint in coating process, spray, be scattered, discharge the pollution of air and water and soil also extremely serious.Therefore, Devoting Major Efforts To Developing water-borne wood coating, the environmental protection and the performance requriements that meet woodwork coating seem especially urgent.
The research of domestic water-borne wood coating has the course of nearly ten years; the development of the technology such as the resin of being correlated with along with Water-borne modification, auxiliary agent, filler, existing aqueous woodware paint obtains the application of actual mass-producing at the strict such as children furniture of environmental requirement and outlet field of furniture in recent years.But due in these fields, the resin used and auxiliary agent still rely on the high two-pack product of cost, cause and can remain high with the water-borne wood coating product price of oiliness woodwork coating phase Ping U.S. at present, be difficult to the market application demand of satisfied most of wood furniture and home decoration material.Adopt lower-cost one-component formulation system, often become film hardness to be difficult to again reach service requirements.Meanwhile, because the vaporization heat break of aqueous solvent in water-borne wood coating is larger, the rate of drying in coating process is also affect its bottleneck used slowly.
When water-base resin and auxiliary agent certain, the appropriate use of filler seems particularly important, and it plays a key effect to the workability of water-borne wood coating product, comprehensive cost, gloss appearance, the aspect such as function intensified.Normally used powder stuffing main Types has carbonate, silicate, vitriol and oxide compound.
For solving the problem, the invention provides a kind of granular filler tonsure combination application technique to improve hardness and the scratch resistance of monocomponent waterborne polyurethane woodwork coating, reducing its film forming time of drying simultaneously.By promoting the use properties of mono-component aqueous woodwork coating, meeting the application demand of high-end woodwork coating, reducing the comprehensive cost of Water-borne modification product.
Selected granular filler is calcium sulfate crystal whiskers, and it grows with single crystal form, has uniform crosssection, compared with bigger serface, the excellent transparency and fibrous texture feature, as the filler of macromolecule filming material, can improve intensity, toughness, the performance such as heat-resisting.Its preparation method can be divided into: hydrothermal method and normal pressure acidization.Its raw material is generally plaster stone, citric acid waste, halogen slag, carbide slag etc.ZL201310412565.6 utilizes striate gypsum for raw material, and through soaking, steam-cured still is steam-cured, twin rollers is broken, then Tumblies Dry and namely obtains calcium sulfate crystal whiskers; ZL200910032761.4 for main raw material, obtains Dihydrate gypsum whiskers through dissolving, filtration etc. with Wingdale, dilute sulphuric acid.ZL200810053636.7 take sea water bittern as raw material, and analyse the operations such as salt through evaporative crystallization, whisker conversion, filtration washing and evaporation, last filtration washing, drying treatment, obtain calcium sulfate whiskers.
These synthesis techniques cannot realize regulation and control and the selection of whisker size.For this reason, invention additionally provides the gradient that a kind of hydro-thermal classification synthetic method obtains the homogeneous calcium sulfate crystal whiskers particle of length-to-diameter ratio and different length-to-diameter ratio thereof.
Summary of the invention
The preparation method of the anti-scratch water-borne wood coating of a kind of quick-drying involved in the present invention, for the monocomponent waterborne polyurethane woodwork coating of low cost, for the scrath resistance improving mono-component aqueous woodwork coating adopts sub-nanoparticle fillers technology to strengthen its hardness, simultaneously because the introducing of whisker granular filler also accelerates its dried coating film time.The present invention proposes a kind of whisker granular filler tonsure combination application technique and realize the Selective long-range DEPT that primary coat and face are coated with different rete.
Its preparation method comprises the following steps:
A, calcium chloride, hexadecyl trimethyl ammonium bromide (CTAB) and water are mixed by a certain percentage, stirring and dissolving, add ammonium sulfate, after stirring, pour in the water heating kettle of a constant volume, under certain temperature and rotating speed, carry out first time hydro-thermal reaction, after for some time, stop reacting by heating;
B, after naturally cooling, be discharged to whizzer, the centrifugal enough time of low-temperature and high-speed, particulate matter is sunken to bottom centrifugal barrel, supernatant liquor is slowly poured in clean centrifugal barrel, to supernatant liquor low-temperature and high-speed centrifugal for some time again, repeat this operation twice, avoid the product of residual hydro-thermal reaction for the first time, thus obtain being rich in whisker micronucleus supernatant liquor, it can be used as the mother liquor of subsequent reactions, adopt after the small size solid whisker washing of centrifugal acquisition and wetly touch wet mode use polyurethane dispersions to be dispersed into certain density molten slurry for subsequent use.Whisker micronucleus plays the inducing action towards the growth of C direction of principal axis in follow-up hydro-thermal reaction, thus obtains the larger sub-nanometer calcium sulfate crystal whisker products of length-to-diameter ratio, and simultaneously owing to can provide equal growing environment, the whisker length obtained is more homogeneous;
C, slowly pours into the supernatant liquor through centrifugal treating in clean water thermal response still, adds a certain amount of ammonium sulfate wherein, after Homogeneous phase mixing, under certain temperature and rotating speed, carry out intermediate water thermal response, the calcium ion newly added under the induction of whisker micronucleus, along the C direction of principal axis homoepitaxial of micronucleus in whole system, crystal growth under almost identical condition, after certain hour, stopped reaction, after naturally cooling, carry out centrifuge washing, the solids use they of acquisition is for subsequent use;
D, get by the aqueous polyurethane dispersion of the small size whisker of a hydro-thermal acquisition, add a certain amount of auxiliary agent wherein and comprise defoamer (TEGO825), deaerating agent (TEGO902), dispersion agent (TEGO740w), wetting agent (TEGO245) etc., the total amount of auxiliary agent is no more than 1% of dispersion, and dispersed with stirring obtains bottom-coating;
E, get the aqueous polyurethane dispersion of the big L/D ratio whisker obtained by secondary hydro-thermal, add a certain amount of auxiliary agent wherein and comprise defoamer (TEGO825), deaerating agent (TEGO902), dispersion agent (TEGO740w), flow agent (TEGO450) etc., the total amount of auxiliary agent is no more than 1% of dispersion, and dispersed with stirring obtains painting coating.
In above-mentioned steps, the auxiliary agent added is enlightening high product, and wherein TEGO825 composition is polyether silicone copolymerized polymer emulsion, containing aerosil; TEGO902 composition is organic-silicon-modified polysiloxane, containing water drain silica; TEGO740w composition is nonionic modified derivative of fatty acid; TEGO245 composition is polyether siloxane copolymer; TEGO450 composition is polyether silicone.
In above-mentioned steps, during first time hydro-thermal reaction, the mass percent of calcium chloride, hexadecyl trimethyl ammonium bromide (CTAB), ammonium sulfate and water is 1:0.1 ~ 0.15:0.2 ~ 0.3:20 ~ 30;
In above-mentioned steps, during first time hydro-thermal reaction, temperature of reaction is 100 ~ 150 DEG C, the reaction times is 30 ~ 60min, stirring velocity is 20 ~ 900rpm;
In above-mentioned steps, the small size whisker major axis average out to 5 μm of first time hydro-thermal acquisition, minor axis average out to 300nm, as shown in Figure 1;
In above-mentioned steps, hydro-thermal small size whisker solid particulate and aqueous polyurethane dispersion mass ratio are for the first time: 1:12.5 ~ 15;
In above-mentioned steps, the sulfate radical quality that second time hydro-thermal reaction adds is primary 1 ~ 2 times;
In above-mentioned steps, during second time hydro-thermal reaction, temperature of reaction is 150 ~ 200 DEG C, the reaction times is 30 ~ 60min, stirring velocity is 20 ~ 900rpm;
In above-mentioned steps, the small size whisker major axis that second time hydro-thermal obtains is average 40 μm, minor axis average out to 800nm, as shown in Figure 2;
In above-mentioned steps, second time hydro-thermal big L/D ratio whisker particulate matter and aqueous polyurethane dispersion mass ratio are: 1:16.7 ~ 33.3;
In above-mentioned steps, when carrying out solid-liquor separation and particle centrifuge washing to hydro-thermal reaction product, the rotating speed of supercentrifuge is at least 10000rpm, and centrifuging temperature is at-5 ~ 0 DEG C, and the single spin time is at least 20min.
The granular filler that the present invention chooses is the sub-nano whisker of calcium sulfate of two kinds of different-grain diameter levels.For primary coat formula, use the whisker that length is little, the whisker that face uses length large in being coated with.In primary coat, whisker mass percentage is greater than 8%, and during face is coated with, whisker total content is no more than 6%.Due to the optical transmission that calcium sulfate crystal whiskers is good, its introducing obviously as the fillers such as silicon oxide can not affect the gloss of film and penetrating sense.In addition, the most important thing is the sub-nano whisker optionally being introduced different-grain diameter level by Gradient distribution at different rete, the enhancement of different rete can be played to greatest extent.For primary coat, the whisker disperse enhancement that length is little is given prominence to, and the whisker added, admittedly containing being coated with high compared with face, strengthens the hardness basis of primary coat greatly by whisker inorganic rigid structure.Be coated with in formula in face and introduce the large whisker of length, the feature that it is fiber reinforced can be given full play to, reinforcement is played to rete scrath resistance.
The calcium sulfate crystal whiskers of above-mentioned different-grain diameter level is obtained by a kind of hydro-thermal classification synthetic method provided by the invention, and product size forms two gradients, and the whisker particle aspect ratio of same gradient is homogeneous.In building-up process, first pass through the nano whisker that calcium ion, sulfate radical, CTAB hydro-thermal reaction acquisition under certain condition length dimension is less; High speed centrifugation, obtains precipitation and supernatant liquor, and after throw out washing now, use they is for subsequent use.Superfine whisker micronucleus, excessive calcium ion and saturated CTAB is rich in supernatant liquor, certain density sulfate ion is added, by the induced growth of whiskerettes, after secondary hydro-thermal in supernatant liquor, obtain the crystal whisker products that length is larger, and length height is homogeneous.
The present invention is coated with filler as face; The hardness of film obtained reaches 2H.Solve the deficiency that poor, the dry speed of mono-component aqueous wood lacquer scrath resistance is slow, for low cost applying waterborne wood lacquer opens new technique.
Accompanying drawing explanation
Fig. 1 is the calcium sulfate crystal whiskers SEM photo that hydro-thermal is obtained for the first time;
Fig. 2 is the calcium sulfate crystal whiskers SEM photo that second time hydro-thermal obtains;
Embodiment
Embodiment 1
1000kg water, 50kg calcium chloride, 5kgCTAB gradation are added in the hydrothermal reaction kettle of 2000L, stirring and dissolving, add 10kg ammonium sulfate, after stirring, be warmed up to 100 DEG C gradually, setting speed 20rpm, after hydro-thermal reaction 30min, stop reacting by heating.After naturally cooling, be discharged to whizzer, 10000rpm high speed centrifugation 20min at-5 DEG C, supernatant liquor is slowly poured in clean centrifugal barrel, 10000rpm high speed centrifugation 20min at-5 DEG C again, repeat this operation twice, obtain being rich in whisker micronucleus supernatant liquor, it can be used as the mother liquor of subsequent reactions.
Get the small size solid whisker washing thing 10kg of centrifugal acquisition, adopt and wet touch wet mode and joined 125kg admittedly containing in the aqueous polyurethane dispersion of 40%, dispersed with stirring, add defoamer (TEGO825) 310g, deaerating agent (TEGO902) 155g, dispersion agent (TEGO740w) 125g, wetting agent (TEGO245) 420g, dispersed with stirring is even, prepares primary coat woodwork coating.
Above-mentioned mother liquor is poured in clean 2000L hydrothermal reaction kettle, adds 10kg ammonium sulfate wherein, after Homogeneous phase mixing, be warmed up to 150 DEG C gradually, setting speed 20rpm, after hydro-thermal reaction 30min, stop reacting by heating.After naturally cooling, carry out centrifuge washing.Get the big L/D ratio solid whisker washing thing 10kg of centrifugal acquisition, adopt and wet touch wet mode and joined 333kg admittedly containing in the aqueous polyurethane dispersion of 40%, dispersed with stirring, add defoamer (TEGO825) 360g, deaerating agent (TEGO902) 195g, dispersion agent (TEGO740w) 155g, flow agent (TEGO450) 165g, dispersed with stirring is even, prepares face painting woodwork coating.
Humidity 40%, at temperature 20 DEG C, gets Ash, primary coat use woodwork coating obtained by spraying, seasoning, recording surface drying time is 20 minutes, within 90 minutes, reach and do solid work, with 600 order sand paperings, after purging, face obtained by spraying is coated with use woodwork coating, seasoning, recording surface drying time is 30 minutes, does solid work 100 minutes time, within 24 hours, harden completely, testing this coating hardness according to " the indoor water-borne wood coating of HG/T3828-2006 " is H.
Embodiment 2
1500kg water, 50kg calcium chloride, 7.5kgCTAB gradation are added in the hydrothermal reaction kettle of 2000L, stirring and dissolving, add 15kg ammonium sulfate, after stirring, be warmed up to 150 DEG C gradually, setting speed 900rpm, after hydro-thermal reaction 60min, stop reacting by heating.After naturally cooling, be discharged to whizzer, 11000rpm high speed centrifugation 40min at-5 DEG C, supernatant liquor is slowly poured in clean centrifugal barrel, 11000rpm high speed centrifugation 40min at-5 DEG C again, repeat this operation twice, obtain being rich in whisker micronucleus supernatant liquor, it can be used as the mother liquor of subsequent reactions.
Get the small size solid whisker washing thing 10kg of centrifugal acquisition, adopt and wet touch wet mode and joined 150kg admittedly containing in the aqueous polyurethane dispersion of 45%, dispersed with stirring, add defoamer (TEGO825) 330g, deaerating agent (TEGO902) 165g, dispersion agent (TEGO740w) 129g, wetting agent (TEGO245) 427g, dispersed with stirring is even, prepares primary coat woodwork coating.
Above-mentioned mother liquor is poured in clean 2000L hydrothermal reaction kettle, adds 20kg ammonium sulfate wherein, after Homogeneous phase mixing, be warmed up to 200 DEG C gradually, setting speed 900rpm, after hydro-thermal reaction 60min, stop reacting by heating.After naturally cooling, carry out centrifuge washing.Get the big L/D ratio solid whisker washing thing 10kg of centrifugal acquisition, adopt and wet touch wet mode and joined 167kg admittedly containing in the aqueous polyurethane dispersion of 45%, dispersed with stirring, add defoamer (TEGO825) 260g, deaerating agent (TEGO902) 115g, dispersion agent (TEGO740w) 85g, flow agent (TEGO450) 105g, dispersed with stirring is even, prepares face painting woodwork coating.
Humidity 40%, at temperature 20 DEG C, gets Ash, primary coat use woodwork coating obtained by spraying, seasoning, recording surface drying time is 20 minutes, within 90 minutes, reach and do solid work, with 600 order sand paperings, after purging, face obtained by spraying is coated with use woodwork coating, seasoning, recording surface drying time is 20 minutes, does solid work 80 minutes time, within 20 hours, harden completely, testing this coating hardness according to " the indoor water-borne wood coating of HG/T3828-2006 " is 2H.
Embodiment 3
1350kg water, 50kg calcium chloride, 6kgCTAB gradation are added in the hydrothermal reaction kettle of 2000L, stirring and dissolving, add 11kg ammonium sulfate, after stirring, be warmed up to 130 DEG C gradually, setting speed 200rpm, after hydro-thermal reaction 45min, stop reacting by heating.After naturally cooling, be discharged to whizzer, 12000rpm high speed centrifugation 30min at-5 DEG C, supernatant liquor is slowly poured in clean centrifugal barrel, 12000rpm high speed centrifugation 30min at-5 DEG C again, repeat this operation twice, obtain being rich in whisker micronucleus supernatant liquor, it can be used as the mother liquor of subsequent reactions.
Get the small size solid whisker washing thing 10kg of centrifugal acquisition, adopt and wet touch wet mode and joined 140kg admittedly containing in the aqueous polyurethane dispersion of 42%, dispersed with stirring, add defoamer (TEGO825) 326g, deaerating agent (TEGO902) 161g, dispersion agent (TEGO740w) 122g, wetting agent (TEGO245) 421g, dispersed with stirring is even, prepares primary coat woodwork coating.
Above-mentioned mother liquor is poured in clean 2000L hydrothermal reaction kettle, adds 17kg ammonium sulfate wherein, after Homogeneous phase mixing, be warmed up to 175 DEG C gradually, setting speed 300rpm, after hydro-thermal reaction 45min, stop reacting by heating.After naturally cooling, carry out centrifuge washing.Get the big L/D ratio solid whisker washing thing 10kg of centrifugal acquisition, adopt and wet touch wet mode and joined 200g admittedly containing in the aqueous polyurethane dispersion of 42%, dispersed with stirring, add defoamer (TEGO825) 261g, deaerating agent (TEGO902) 118g, dispersion agent (TEGO740w) 90g, flow agent (TEGO450) 115g, dispersed with stirring is even, prepares face painting woodwork coating.
Humidity 40%, at temperature 20 DEG C, gets Ash, primary coat use woodwork coating obtained by spraying, seasoning, recording surface drying time is 20 minutes, within 90 minutes, reach and do solid work, with 600 order sand paperings, after purging, face obtained by spraying is coated with use woodwork coating, seasoning, recording surface drying time is 25 minutes, does solid work 85 minutes time, within 24 hours, harden completely, testing this coating hardness according to " the indoor water-borne wood coating of HG/T3828-2006 " is H.
Claims (10)
1. a preparation method for the anti-scratch water-borne wood coating of quick-drying, is characterized in that comprising the following steps:
1) calcium chloride, hexadecyl trimethyl ammonium bromide (CTAB) and water are mixed by a certain percentage, stirring and dissolving, add ammonium sulfate, after stirring, pour in the water heating kettle of a constant volume, under certain temperature and rotating speed, carry out first time hydro-thermal reaction, after for some time, stop reacting by heating;
2) after naturally cooling, be discharged to whizzer, the centrifugal enough time of low-temperature and high-speed, particulate matter is sunken to bottom centrifugal barrel, supernatant liquor is slowly poured in clean centrifugal barrel, by supernatant liquor low-temperature and high-speed centrifugal for some time again, repeat this operation twice, avoid the product leaving first time hydro-thermal reaction, thus obtain being rich in whisker micronucleus supernatant liquor, it can be used as the mother liquor of subsequent reactions, adopt after the undersized solid whisker washing of centrifugal acquisition and wetly touch wet mode use polyurethane dispersions to be dispersed into certain density molten slurry for subsequent use; Whisker micronucleus plays the inducing action towards the growth of C direction of principal axis in follow-up hydro-thermal reaction, thus obtains the larger sub-nanometer calcium sulfate crystal whisker products of length-to-diameter ratio, and simultaneously owing to can provide equal growing environment, the whisker length obtained is more homogeneous;
3) supernatant liquor through centrifugal treating is slowly poured in clean water thermal response still, add a certain amount of ammonium sulfate wherein, after Homogeneous phase mixing, intermediate water thermal response is carried out under certain temperature and rotating speed, calcium ion in mother liquor is under the induction of whisker micronucleus, along the C direction of principal axis homoepitaxial of micronucleus in whole system, crystal growth under almost identical condition, after certain hour, stopped reaction, after naturally cooling, carry out centrifuge washing, the solids use they of acquisition is for subsequent use;
4) get by the aqueous polyurethane dispersion of the small size whisker of a hydro-thermal acquisition, add a certain amount of auxiliary agent wherein, auxiliary agent comprises defoamer, deaerating agent, dispersion agent, wetting agent, and the total amount of auxiliary agent is no more than 1% of dispersion, and dispersed with stirring obtains bottom-coating;
5) aqueous polyurethane dispersion of the big L/D ratio whisker obtained by secondary hydro-thermal is got, add a certain amount of auxiliary agent wherein, auxiliary agent comprises defoamer, deaerating agent, dispersion agent, flow agent, and the total amount of auxiliary agent is no more than 1% of dispersion, and dispersed with stirring obtains painting coating.
2. the preparation method of the anti-scratch water-borne wood coating of quick-drying according to claim 1, it is characterized in that, in step 1) described in first time hydro-thermal reaction time, the mass percent of calcium chloride, hexadecyl trimethyl ammonium bromide (CTAB), ammonium sulfate and water is 1:0.1 ~ 0.15:0.2 ~ 0.3:20 ~ 30.
3. the preparation method of the anti-scratch water-borne wood coating of quick-drying according to claim 1, it is characterized in that, in step 1) described in first time hydro-thermal reaction time, temperature of reaction is 100 ~ 150 DEG C, the reaction times is 30 ~ 60min, stirring velocity is 20 ~ 900rpm.
4. the preparation method of the anti-scratch water-borne wood coating of quick-drying according to claim 1, is characterized in that, in step 2) described in first time hydro-thermal obtain small size whisker major axis average out to 5 μm, minor axis average out to 300nm.
5. the preparation method of the anti-scratch water-borne wood coating of quick-drying according to claim 1, is characterized in that, in step 2) described in first time hydro-thermal small size whisker solid particulate and aqueous polyurethane dispersion mass ratio be: 1:12.5 ~ 15.
6. the preparation method of the anti-scratch water-borne wood coating of quick-drying according to claim 1, is characterized in that, in step 3) described in the sulfate radical quality that adds of second time hydro-thermal reaction be primary 1 ~ 2 times.
7. the preparation method of the anti-scratch water-borne wood coating of quick-drying according to claim 1, it is characterized in that, in step 3) described in second time hydro-thermal reaction time, temperature of reaction is 150 ~ 200 DEG C, the reaction times is 30 ~ 60min, stirring velocity is 20 ~ 900rpm.
8. the preparation method of the anti-scratch water-borne wood coating of quick-drying according to claim 1, is characterized in that, in step 3) described in, the small size whisker major axis that second time hydro-thermal obtains is average 40 μm, minor axis average out to 800nm.
9. the preparation method of the anti-scratch water-borne wood coating of quick-drying according to claim 1, it is characterized in that, in step 3) described in above-mentioned steps in, second time hydro-thermal big L/D ratio whisker particulate matter and aqueous polyurethane dispersion mass ratio be: 1:16.7 ~ 33.3.
10. the preparation method of the anti-scratch water-borne wood coating of quick-drying according to claim 1, it is characterized in that, in step 3) described in solid-liquor separation and particle centrifuge washing are carried out to hydro-thermal reaction product time, the rotating speed of supercentrifuge is at least 10000rpm, centrifuging temperature is at-5 ~ 0 DEG C, and the single spin time is at least 20min.
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| CN115975490A (en) * | 2023-01-05 | 2023-04-18 | 深圳市深赛尔股份有限公司 | Environment-friendly polyurethane water-based paint and preparation method thereof |
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| US20150158997A1 (en) * | 2013-12-06 | 2015-06-11 | Georgia-Pacific Gypsum Llc | Gypsum composite modifiers |
| CN104231776A (en) * | 2014-09-12 | 2014-12-24 | 浙江浦江县新志复合材料科技有限公司 | Insulated fireproof anticorrosive coating and preparation method thereof |
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| CN115975490A (en) * | 2023-01-05 | 2023-04-18 | 深圳市深赛尔股份有限公司 | Environment-friendly polyurethane water-based paint and preparation method thereof |
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