CN105670478A - Method for preparing one-component water-based polyurethane paint - Google Patents
Method for preparing one-component water-based polyurethane paint Download PDFInfo
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- CN105670478A CN105670478A CN201610158394.2A CN201610158394A CN105670478A CN 105670478 A CN105670478 A CN 105670478A CN 201610158394 A CN201610158394 A CN 201610158394A CN 105670478 A CN105670478 A CN 105670478A
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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
- 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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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention provides a method for preparing one-component water-based polyurethane paint. The method includes steps of (1), crushing fenite, to be more specific, coarsely sorting, crushing and reducing the fenite and grinding the fenite by the aid of a vibration mill to obtain fine fenite powder; (2), adding the fine fenite powder and calcium hydroxide solution into a reaction kettle, stirring the fine fenite powder and the calcium hydroxide solution, filling the reaction kettle with air and carbon dioxide, continuing to stir the fine fenite powder and the calcium hydroxide solution to obtain mixtures, stopping filling the reaction kettle with the air and the calcium dioxide, filtering the mixtures, then drying the mixtures and grinding the mixtures to obtain nano-crystallized composite fenite powder; (3), adding the nano-crystallized composite fenite powder into water, stirring the nano-crystallized composite fenite powder to obtain suspension pulp, adding stearic acid into the suspension pulp, heating and stirring the stearic acid and the suspension pulp to obtain mixtures, discharging the mixtures and then filtering, drying, smashing and sieving the mixtures to obtain modified composite fenite powder; (4), mixing and stirring polyurethane resin, polyphenylene sulfide and the modified composite fenite powder with one another to obtain mixtures, extruding and granulating the mixtures to obtain granules, adding the granules into a stirrer, adding pigment, wetting dispersing agents, ionized water, anti-settling agents, coupling agents and leveling agents into the stirrer, stirring the granules, the pigment, the wetting dispersing agents, the ionized water, the anti-settling agents, the coupling agents and the leveling agents to obtain mixtures and curing the mixtures in a still standing manner. The method has the advantage that the one-component water-based polyurethane paint prepared by the aid of the method is excellent in water resistance and acid resistance.
Description
Technical field:
The present invention relates to a kind of coating, particularly relate to the preparation method of a kind of single-component water-based polyurethane coating.
Background technology:
Polyurethane coating has the performances such as excellent erosion resistant, snappiness, sticking power, is widely used as wood lacquer, building coating, automobile finish and metal anti-corrosive paint etc. along with the raising of human life quality, environmental regulation is also more and more stricter, and the quantity discharged of volatile organic compounds (VOC), the content of hazardous solvent are had strict limitation by various environmental regulation. solvent based coating contains a large amount of organic solvent, serious environment pollution, particularly the residual isocyanate monomer in solvent-type double-component urethane, and toxicity is extremely high. and aqueous polyurethane is dispersion medium due to it taking water, not only have nontoxic, nonflammable, free from environmental pollution, energy-conservation, the advantage such as safe and reliable, also there are some important performance characteristics of solvent borne polyurethane simultaneously, aqueous polyurethane coating is by the hardness height of polyurethane coating film, strong adhesion, corrosion-resistant, the advantages such as solvent resistant is good combine with the low VOC content of water-borne coatings, meet " three prerequisites " (resource of development coatings industry, the energy, pollution-free) and " four E principles " (economic ECONOMY, efficiency EFFICIENCY, ecological ECOLOGY, energy ENERGY) and the requirements of the times day by day strengthened adapt, therefore aqueous polyurethane coating obtains a wide range of applications in recent years.
Urethane develops from the thirties in 20th century; and the research of a small amount of aqueous polyurethane is just had in the forties; nineteen forty-three, Germany chemist Schlack was under emulsifying agent and protective colloid exist, and successfully prepared polyaminoester emulsion first by vulcabond emulsification in water. Nineteen fifty-three, the toluene solution of diisocyanate based base polyurethane prepolymer for use as was scattered in water by the researchist of DuPont, uses diamine chain extension, has synthesized aqueous polyurethane. But polyurethane material science is at the early-stage at that time, and aqueous polyurethane is also paid attention to, until just industrialization first in 1967, within 1972, polyurethane aqueous dispersion body is formally produced in enormous quantities by Beyer Co., Ltd as leather coating.The seventies and eighties in 20th century, some aqueous polyurethane products of U.S., moral, Deng state have developed into actual production and application from advanced development, there are the aqueous polyurethane product-feed of the multiple trade mark in some companies, such as the aqueous vinyl adhesive for polyurethane KR series etc. of the series such as the series such as DispercollKA of Bayer company of Germany, X and E of U.S. Wyandotte chemistry company, Japanese silver dollar industry company. From the later stage nineties 20th century, the Application Areas of aqueous polyurethane starts constantly to widen, and coheres at PVC, has certain industrial applications in automotive upholstery, coating, coating etc.
Aqueous polyurethane was studied from 1972 by China, the nineties in 20th century, and the PUD technological achievement of University of Anhui, Dandong light industry research institute, Chengdu Univ. of Science & Technology (branch of existing Sichuan University) etc. is all successively converted. At present, China has many fields applying waterborne polyurethane product, but wherein many expensive goods still can not be self-supporting, and therefore independent research high-performance water-based polyurethane just becomes one of the most popular direction of domestic polyurethane field.
The Chinese patent of publication number to be CN102382563B, publication date be 2014.04.02, painting (Shenzhen) company limited of application artificial China discloses " low temperature heat activated blocked polyurethane coating and its preparation method and application ", described low temperature heat activated blocked polyurethane coating, parts by weights meter, primarily of following group of part composition: acrylic resin 40-70; Dispersion agent 0.5-1; Anti-settling agent 0.2-0.5; Color stuffing 0-28; Dead front type solidifying agent 15-20; Catalyzer 1-2; Adhesion promoter 2-4; Mixed solvent 5-10. This invention has the advantages such as the reaction times is short, colourity is shallow, good stability, single-component are easy to use, low-temperature curing energy consumption is little; the decorations such as plated item, metal chassis, button, automobile finish and protection can be widely used in; it is a kind of formaldehydeless high-performance coating meeting toy lacquer standard, has bigger implementary value and economic results in society. But, there is water tolerance and the poor problem of acid resistance in this coating, in fishing gear time be restricted.
Summary of the invention:
The technical problem to be solved in the present invention is to provide the preparation method of a kind of single-component water-based polyurethane coating, prepares the coating and has good water tolerance and acid resistance.
For solving the problems of the technologies described above, the technical scheme of the present invention is:
A preparation method for single-component water-based polyurethane coating, its step is as follows:
(1) fenite being used jaw crushing crusher machine, rough segmentation to granularity is 2mm, then adds roller crusher fragmentation, division to granularity is 0.5mm, obtain fenite powder body, fenite powder body is added vibration mill grinding, obtains the fenite fine powder that mean particle size is 5 μm;
(2) the fenite fine powder, the aqua calcis that step (1) are obtained add in reactor, stir 2 little of even dispersion, lead to into air and carbon dioxide, continue to stir 5 hours, stop ventilation, slurries filtration is placed in vacuum drying oven at 110 DEG C dry 8 hours, after grinding, obtains nanometer fenite composite granule;
(3) nanometer fenite composite granule that step (2) obtains is added to the water, even dispersion it is stirred under 400rpm speed, obtain the suspension slurry that concentration is 35%, stearic acid is added and suspends in slurry, be heated to 70 DEG C, stir 1 hour under 600rpm speed, filter after discharging, it is placed at 110 DEG C, baking oven dry 8 hours, crosses 200 orders sieves after pulverizing, obtain modification fenite composite granule;
(4) modification fenite composite granule mix and blend urethane resin, polyphenylene sulfide, step (3) obtained 5 minutes, shifting to parallel dual-screw extruding machine is extruded, pellet is obtained after granulation, pellet is added agitator, pigment, wetting dispersing agent is added under 600rpm speed, stir 15 minutes, adjusting rotary speed is to 800rpm, adding deionized water, anti-settling agent, stir 15 minutes, adjusting rotary speed is to 500rpm, add coupling agent, flow agent, stir 25 minutes, leave standstill slaking 1 hour, obtain single-component water-based polyurethane coating.
Preferably, in step of the present invention (2), the weight ratio of fenite fine powder and aqua calcis is 1:4.
Preferably, in step of the present invention (3), the weight ratio of nanometer fenite composite granule and stearic acid is 90:1.
Preferably, in step of the present invention (4), by weight, urethane resin 65-75 part, polyphenylene sulfide 6-7 part, modification fenite composite granule 9-14 part, pigment 10-15 part, wetting dispersing agent 0.5-1.5 part, deionized water 15-20 part, anti-settling agent 0.2-0.7 part, coupling agent 1-2 part, flow agent 2-4 part.
Preferably, in step of the present invention (4), urethane resin is waterborne polyurethane resin.
Preferably, in step of the present invention (4), wetting dispersing agent is poly carboxylic acid ammonium salt.
Preferably, in step of the present invention (4), anti-settling agent is polyolefin-wax.
Preferably, in step of the present invention (4), pigment is titanium dioxide.
Preferably, in step of the present invention (4), coupling agent is methacrylic acid trimethylsilyl group.
Preferably, in step of the present invention (4), flow agent is silicone oil or siloxanes.
Compared with prior art, the present invention has following useful effect:
1) fenite is a kind of Alkaline minerals with sheet structure, the present invention is by broken to it, rough segmentation, division, the very little fine powder of granularity is obtained with vibration mill grinding, by aqua calcis and carbonic acid gas, it is carried out nanometer modification again, nano-calcium carbonate particles is coated on its surface and forms composite granule, substantially increase surfaceness and specific surface area, improve its dispersion in urethane resin, but the surface of composite granule is still in wetting ability, and the consistency between resin matrix is poor, therefore composite granule is also carried out surface modification by stearic acid by the present invention, stearic acid is successfully adsorbed in composite granule surface and creates chemical bonding reaction, thus organic coating deposition is defined on composite granule surface, the wetting ability on composite granule surface is become hydrophobicity, improve the consistency between composite granule and resin matrix and interface bond strength, when coating is in sour environment, fenite in alkalescence can be neutral substance with acidic substance neutralization reaction, resin matrix is greatly avoided to be subject to the infringement of acidic substance, add that the sheet structure of fenite can play certain iris action, therefore the acid resistance of coating can effectively be improved.
2) polyphenylene sulfide full name is polyphenylene thioether, it it is thermoplastic resin with thiophenyl in molecular backbone chain, it has extremely low water-intake rate, with urethane resin blended after, can effectively improve the water tolerance of coating, in addition, water also can be played certain iris action by the sheet structure of fenite, therefore further increases the water tolerance of coating.
Embodiment:
Below in conjunction with specific embodiment, the present invention being described in detail, illustrative examples and explanation in this present invention are used for explaining the present invention, but not as a limitation of the invention.
Embodiment 1
Single-component water-based polyurethane coating is prepared according to following step:
(1) fenite being used jaw crushing crusher machine, rough segmentation to granularity is 2mm, then adds roller crusher fragmentation, division to granularity is 0.5mm, obtain fenite powder body, fenite powder body is added vibration mill grinding, obtains the fenite fine powder that mean particle size is 5 μm;
(2) the fenite fine powder, the aqua calcis that the step (1) that weight ratio is 1:4 are obtained add in reactor, stir 2 little of even dispersion, lead to into air and carbon dioxide, continue to stir 5 hours, stop ventilation, slurries filtration is placed in vacuum drying oven at 110 DEG C dry 8 hours, after grinding, obtains nanometer fenite composite granule;
(3) nanometer fenite composite granule that step (2) obtains is added to the water, even dispersion it is stirred under 400rpm speed, obtaining the suspension slurry that concentration is 35%, added by stearic acid and suspend in slurry, the weight ratio of nanometer fenite composite granule and stearic acid is 90:1, it is heated to 70 DEG C, stir 1 hour under 600rpm speed, filter after discharging, be placed at 110 DEG C, baking oven dry 8 hours, cross 200 order sieves after pulverizing, obtain modification fenite composite granule;
(4) by 70 weight part waterborne polyurethane resins, 6.3 weight part polyphenylene sulfides, the modification fenite composite granule mix and blend that 9 weight part steps (3) obtain 5 minutes, shifting to parallel dual-screw extruding machine is extruded, pellet is obtained after granulation, pellet is added agitator, 12 weight part titanium dioxides are added under 600rpm speed, 1.4 weight part poly carboxylic acid ammonium salts, stir 15 minutes, adjusting rotary speed is to 800rpm, add 15 parts by weight of deionized water, 0.7 weight part polyolefin-wax, stir 15 minutes, adjusting rotary speed is to 500rpm, add 1.6 weight parts of methacrylic acid trimethylsilyl groups, 2.5 weight part silicone oil, stir 25 minutes, leave standstill slaking 1 hour, obtain single-component water-based polyurethane coating.
Embodiment 2
Single-component water-based polyurethane coating is prepared according to following step:
(1) fenite being used jaw crushing crusher machine, rough segmentation to granularity is 2mm, then adds roller crusher fragmentation, division to granularity is 0.5mm, obtain fenite powder body, fenite powder body is added vibration mill grinding, obtains the fenite fine powder that mean particle size is 5 μm;
(2) the fenite fine powder, the aqua calcis that the step (1) that weight ratio is 1:4 are obtained add in reactor, stir 2 little of even dispersion, lead to into air and carbon dioxide, continue to stir 5 hours, stop ventilation, slurries filtration is placed in vacuum drying oven at 110 DEG C dry 8 hours, after grinding, obtains nanometer fenite composite granule;
(3) nanometer fenite composite granule that step (2) obtains is added to the water, even dispersion it is stirred under 400rpm speed, obtaining the suspension slurry that concentration is 35%, added by stearic acid and suspend in slurry, the weight ratio of nanometer fenite composite granule and stearic acid is 90:1, it is heated to 70 DEG C, stir 1 hour under 600rpm speed, filter after discharging, be placed at 110 DEG C, baking oven dry 8 hours, cross 200 order sieves after pulverizing, obtain modification fenite composite granule;
(4) by 72 weight part waterborne polyurethane resins, 6 weight part polyphenylene sulfides, the modification fenite composite granule mix and blend that 11 weight part steps (3) obtain 5 minutes, shifting to parallel dual-screw extruding machine is extruded, pellet is obtained after granulation, pellet is added agitator, 14 weight part titanium dioxides are added under 600rpm speed, 1.2 weight part poly carboxylic acid ammonium salts, stir 15 minutes, adjusting rotary speed is to 800rpm, add 20 parts by weight of deionized water, 0.2 weight part polyolefin-wax, stir 15 minutes, adjusting rotary speed is to 500rpm, add 1.2 weight parts of methacrylic acid trimethylsilyl groups, 4 weight part silicone oil, stir 25 minutes, leave standstill slaking 1 hour, obtain single-component water-based polyurethane coating.
Embodiment 3
Single-component water-based polyurethane coating is prepared according to following step:
(1) fenite being used jaw crushing crusher machine, rough segmentation to granularity is 2mm, then adds roller crusher fragmentation, division to granularity is 0.5mm, obtain fenite powder body, fenite powder body is added vibration mill grinding, obtains the fenite fine powder that mean particle size is 5 μm;
(2) the fenite fine powder, the aqua calcis that the step (1) that weight ratio is 1:4 are obtained add in reactor, stir 2 little of even dispersion, lead to into air and carbon dioxide, continue to stir 5 hours, stop ventilation, slurries filtration is placed in vacuum drying oven at 110 DEG C dry 8 hours, after grinding, obtains nanometer fenite composite granule;
(3) nanometer fenite composite granule that step (2) obtains is added to the water, even dispersion it is stirred under 400rpm speed, obtaining the suspension slurry that concentration is 35%, added by stearic acid and suspend in slurry, the weight ratio of nanometer fenite composite granule and stearic acid is 90:1, it is heated to 70 DEG C, stir 1 hour under 600rpm speed, filter after discharging, be placed at 110 DEG C, baking oven dry 8 hours, cross 200 order sieves after pulverizing, obtain modification fenite composite granule;
(4) by 65 weight part waterborne polyurethane resins, 7 weight part polyphenylene sulfides, the modification fenite composite granule mix and blend that 13 weight part steps (3) obtain 5 minutes, shifting to parallel dual-screw extruding machine is extruded, pellet is obtained after granulation, pellet is added agitator, 11 weight part titanium dioxides are added under 600rpm speed, 1.5 weight part poly carboxylic acid ammonium salts, stir 15 minutes, adjusting rotary speed is to 800rpm, add 17 parts by weight of deionized water, 0.5 weight part polyolefin-wax, stir 15 minutes, adjusting rotary speed is to 500rpm, add 1.4 weight parts of methacrylic acid trimethylsilyl groups, 3 weight part silicone oil, stir 25 minutes, leave standstill slaking 1 hour, obtain single-component water-based polyurethane coating.
Embodiment 4
Single-component water-based polyurethane coating is prepared according to following step:
(1) fenite being used jaw crushing crusher machine, rough segmentation to granularity is 2mm, then adds roller crusher fragmentation, division to granularity is 0.5mm, obtain fenite powder body, fenite powder body is added vibration mill grinding, obtains the fenite fine powder that mean particle size is 5 μm;
(2) the fenite fine powder, the aqua calcis that the step (1) that weight ratio is 1:4 are obtained add in reactor, stir 2 little of even dispersion, lead to into air and carbon dioxide, continue to stir 5 hours, stop ventilation, slurries filtration is placed in vacuum drying oven at 110 DEG C dry 8 hours, after grinding, obtains nanometer fenite composite granule;
(3) nanometer fenite composite granule that step (2) obtains is added to the water, even dispersion it is stirred under 400rpm speed, obtaining the suspension slurry that concentration is 35%, added by stearic acid and suspend in slurry, the weight ratio of nanometer fenite composite granule and stearic acid is 90:1, it is heated to 70 DEG C, stir 1 hour under 600rpm speed, filter after discharging, be placed at 110 DEG C, baking oven dry 8 hours, cross 200 order sieves after pulverizing, obtain modification fenite composite granule;
(4) by 75 weight part waterborne polyurethane resins, 6.5 weight part polyphenylene sulfides, the modification fenite composite granule mix and blend that 10 weight part steps (3) obtain 5 minutes, shifting to parallel dual-screw extruding machine is extruded, pellet is obtained after granulation, pellet is added agitator, 13 weight part titanium dioxides are added under 600rpm speed, 0.5 weight part poly carboxylic acid ammonium salt, stir 15 minutes, adjusting rotary speed is to 800rpm, add 19 parts by weight of deionized water, 0.3 weight part polyolefin-wax, stir 15 minutes, adjusting rotary speed is to 500rpm, add 1.5 weight parts of methacrylic acid trimethylsilyl groups, 3.5 weight part siloxanes, stir 25 minutes, leave standstill slaking 1 hour, obtain single-component water-based polyurethane coating.
Embodiment 5
Single-component water-based polyurethane coating is prepared according to following step:
(1) fenite being used jaw crushing crusher machine, rough segmentation to granularity is 2mm, then adds roller crusher fragmentation, division to granularity is 0.5mm, obtain fenite powder body, fenite powder body is added vibration mill grinding, obtains the fenite fine powder that mean particle size is 5 μm;
(2) the fenite fine powder, the aqua calcis that the step (1) that weight ratio is 1:4 are obtained add in reactor, stir 2 little of even dispersion, lead to into air and carbon dioxide, continue to stir 5 hours, stop ventilation, slurries filtration is placed in vacuum drying oven at 110 DEG C dry 8 hours, after grinding, obtains nanometer fenite composite granule;
(3) nanometer fenite composite granule that step (2) obtains is added to the water, even dispersion it is stirred under 400rpm speed, obtaining the suspension slurry that concentration is 35%, added by stearic acid and suspend in slurry, the weight ratio of nanometer fenite composite granule and stearic acid is 90:1, it is heated to 70 DEG C, stir 1 hour under 600rpm speed, filter after discharging, be placed at 110 DEG C, baking oven dry 8 hours, cross 200 order sieves after pulverizing, obtain modification fenite composite granule;
(4) by 74 weight part waterborne polyurethane resins, 6.6 weight part polyphenylene sulfides, the modification fenite composite granule mix and blend that 12 weight part steps (3) obtain 5 minutes, shifting to parallel dual-screw extruding machine is extruded, pellet is obtained after granulation, pellet is added agitator, 10 weight part titanium dioxides are added under 600rpm speed, 1 weight part poly carboxylic acid ammonium salt, stir 15 minutes, adjusting rotary speed is to 800rpm, add 16 parts by weight of deionized water, 0.4 weight part polyolefin-wax, stir 15 minutes, adjusting rotary speed is to 500rpm, add 2 weight parts of methacrylic acid trimethylsilyl groups, 2.4 weight part siloxanes, stir 25 minutes, leave standstill slaking 1 hour, obtain single-component water-based polyurethane coating.
Embodiment 6
Single-component water-based polyurethane coating is prepared according to following step:
(1) fenite being used jaw crushing crusher machine, rough segmentation to granularity is 2mm, then adds roller crusher fragmentation, division to granularity is 0.5mm, obtain fenite powder body, fenite powder body is added vibration mill grinding, obtains the fenite fine powder that mean particle size is 5 μm;
(2) the fenite fine powder, the aqua calcis that the step (1) that weight ratio is 1:4 are obtained add in reactor, stir 2 little of even dispersion, lead to into air and carbon dioxide, continue to stir 5 hours, stop ventilation, slurries filtration is placed in vacuum drying oven at 110 DEG C dry 8 hours, after grinding, obtains nanometer fenite composite granule;
(3) nanometer fenite composite granule that step (2) obtains is added to the water, even dispersion it is stirred under 400rpm speed, obtaining the suspension slurry that concentration is 35%, added by stearic acid and suspend in slurry, the weight ratio of nanometer fenite composite granule and stearic acid is 90:1, it is heated to 70 DEG C, stir 1 hour under 600rpm speed, filter after discharging, be placed at 110 DEG C, baking oven dry 8 hours, cross 200 order sieves after pulverizing, obtain modification fenite composite granule;
(4) by 66 weight part waterborne polyurethane resins, 6.9 weight part polyphenylene sulfides, the modification fenite composite granule mix and blend that 14 weight part steps (3) obtain 5 minutes, shifting to parallel dual-screw extruding machine is extruded, pellet is obtained after granulation, pellet is added agitator, 15 weight part titanium dioxides are added under 600rpm speed, 0.9 weight part poly carboxylic acid ammonium salt, stir 15 minutes, adjusting rotary speed is to 800rpm, add 18 parts by weight of deionized water, 0.6 weight part polyolefin-wax, stir 15 minutes, adjusting rotary speed is to 500rpm, add 1 weight parts of methacrylic acid trimethylsilyl group, 2 weight part siloxanes, stir 25 minutes, leave standstill slaking 1 hour, obtain single-component water-based polyurethane coating.
After tested, water tolerance and the acid resistance of the coating that embodiment 1-6 is obtained and comparative example are as shown in the table, and comparative example is publication number is the Chinese patent of CN102382563B.
Water tolerance test process is: each paint coatings is solidified post-drying, is soaked in water 5 hours, weighs after taking-up after weighing, calculate water-intake rate, water-intake rate is more little, and water tolerance is more good, water-intake rate=(after soaking weight before weight-immersion)/soak front weight × 100%.
Acid resistance test process is: be soaked in the sulphuric acid soln that mass concentration is 10% by each coating film, takes out observation film coated surface situation after soaking 12 hours, 24 hours respectively.
As seen from the above table, the water-intake rate that the present invention obtains is significantly less than comparative example, and the film coated surface situation after sulfuric acid of soaking, significantly better than comparative example, shows good water tolerance and acid resistance.
Above-described embodiment is the principle of illustrative the present invention and effect thereof only, but not for limiting the present invention. Above-described embodiment all under the spirit not running counter to the present invention and category, can be modified or change by any person skilled in the art scholar. Therefore, in art, tool usually intellectual, not departing under disclosed spirit and technological thought all the equivalence modifications completed or change, must be contained by the claim of the present invention such as.
Claims (10)
1. the preparation method of a single-component water-based polyurethane coating, it is characterised in that, its step is as follows:
(1) fenite being used jaw crushing crusher machine, rough segmentation to granularity is 2mm, then adds roller crusher fragmentation, division to granularity is 0.5mm, obtain fenite powder body, fenite powder body is added vibration mill grinding, obtains the fenite fine powder that mean particle size is 5 μm;
(2) the fenite fine powder, the aqua calcis that step (1) are obtained add in reactor, stir 2 little of even dispersion, lead to into air and carbon dioxide, continue to stir 5 hours, stop ventilation, slurries filtration is placed in vacuum drying oven at 110 DEG C dry 8 hours, after grinding, obtains nanometer fenite composite granule;
(3) nanometer fenite composite granule that step (2) obtains is added to the water, even dispersion it is stirred under 400rpm speed, obtain the suspension slurry that concentration is 35%, stearic acid is added and suspends in slurry, be heated to 70 DEG C, stir 1 hour under 600rpm speed, filter after discharging, it is placed at 110 DEG C, baking oven dry 8 hours, crosses 200 orders sieves after pulverizing, obtain modification fenite composite granule;
(4) modification fenite composite granule mix and blend urethane resin, polyphenylene sulfide, step (3) obtained 5 minutes, shifting to parallel dual-screw extruding machine is extruded, pellet is obtained after granulation, pellet is added agitator, pigment, wetting dispersing agent is added under 600rpm speed, stir 15 minutes, adjusting rotary speed is to 800rpm, adding deionized water, anti-settling agent, stir 15 minutes, adjusting rotary speed is to 500rpm, add coupling agent, flow agent, stir 25 minutes, leave standstill slaking 1 hour, obtain single-component water-based polyurethane coating.
2. the preparation method of a kind of single-component water-based polyurethane coating according to claim 1, it is characterised in that: in described step (2), the weight ratio of fenite fine powder and aqua calcis is 1:4.
3. the preparation method of a kind of single-component water-based polyurethane coating according to claim 1, it is characterised in that: in described step (3), the weight ratio of nanometer fenite composite granule and stearic acid is 90:1.
4. the preparation method of a kind of single-component water-based polyurethane coating according to claim 1, it is characterized in that: in described step (4), by weight, urethane resin 65-75 part, polyphenylene sulfide 6-7 part, modification fenite composite granule 9-14 part, pigment 10-15 part, wetting dispersing agent 0.5-1.5 part, deionized water 15-20 part, anti-settling agent 0.2-0.7 part, coupling agent 1-2 part, flow agent 2-4 part.
5. the preparation method of a kind of single-component water-based polyurethane coating according to claim 1, it is characterised in that: in described step (4), urethane resin is waterborne polyurethane resin.
6. the preparation method of a kind of single-component water-based polyurethane coating according to claim 1, it is characterised in that: in described step (4), wetting dispersing agent is poly carboxylic acid ammonium salt.
7. the preparation method of a kind of single-component water-based polyurethane coating according to claim 1, it is characterised in that: in described step (4), anti-settling agent is polyolefin-wax.
8. the preparation method of a kind of single-component water-based polyurethane coating according to claim 1, it is characterised in that: in described step (4), pigment is titanium dioxide.
9. the preparation method of a kind of single-component water-based polyurethane coating according to claim 1, it is characterised in that: in described step (4), coupling agent is methacrylic acid trimethylsilyl group.
10. the preparation method of a kind of single-component water-based polyurethane coating according to claim 1, it is characterised in that: in described step (4), flow agent is silicone oil or siloxanes.
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| CN201610158394.2A CN105670478A (en) | 2016-03-18 | 2016-03-18 | Method for preparing one-component water-based polyurethane paint |
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| CN201610158394.2A CN105670478A (en) | 2016-03-18 | 2016-03-18 | Method for preparing one-component water-based polyurethane paint |
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Cited By (1)
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| CN112724768A (en) * | 2019-10-14 | 2021-04-30 | 上海飞凯光电材料股份有限公司 | Edge sealing material, preparation method and application thereof |
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