CN105802463A - Waterborne polyurethane high-gloss 2K coating and preparation method thereof - Google Patents
Waterborne polyurethane high-gloss 2K coating and preparation method thereof Download PDFInfo
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- CN105802463A CN105802463A CN201610185883.7A CN201610185883A CN105802463A CN 105802463 A CN105802463 A CN 105802463A CN 201610185883 A CN201610185883 A CN 201610185883A CN 105802463 A CN105802463 A CN 105802463A
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- 238000000576 coating method Methods 0.000 title claims abstract description 87
- 239000011248 coating agent Substances 0.000 title claims abstract description 83
- 239000004814 polyurethane Substances 0.000 title claims abstract description 59
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000003085 diluting agent Substances 0.000 claims abstract description 13
- 239000000049 pigment Substances 0.000 claims abstract description 13
- 229920001228 polyisocyanate Polymers 0.000 claims abstract description 11
- 239000005056 polyisocyanate Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 9
- 239000003973 paint Substances 0.000 claims description 28
- 238000003756 stirring Methods 0.000 claims description 23
- 239000011259 mixed solution Substances 0.000 claims description 18
- 239000002994 raw material Substances 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 229920005862 polyol Polymers 0.000 claims description 11
- 150000003077 polyols Chemical class 0.000 claims description 11
- 239000008367 deionised water Substances 0.000 claims description 10
- 229910021641 deionized water Inorganic materials 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 9
- 229920003023 plastic Polymers 0.000 claims description 9
- 239000004033 plastic Substances 0.000 claims description 9
- 239000002270 dispersing agent Substances 0.000 claims description 7
- 239000006254 rheological additive Substances 0.000 claims description 7
- 239000000080 wetting agent Substances 0.000 claims description 7
- 239000013530 defoamer Substances 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 4
- 239000002518 antifoaming agent Substances 0.000 claims description 4
- 238000004040 coloring Methods 0.000 claims description 4
- 229920001577 copolymer Polymers 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000002736 nonionic surfactant Substances 0.000 claims description 4
- 229920000570 polyether Polymers 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 4
- 239000002562 thickening agent Substances 0.000 claims description 4
- 229920002125 Sokalan® Polymers 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- 239000003086 colorant Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000000839 emulsion Substances 0.000 claims description 3
- 238000009775 high-speed stirring Methods 0.000 claims description 3
- 239000001023 inorganic pigment Substances 0.000 claims description 3
- 239000012860 organic pigment Substances 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 239000004584 polyacrylic acid Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims 1
- 229920005989 resin Polymers 0.000 claims 1
- 239000002904 solvent Substances 0.000 abstract description 11
- 238000010276 construction Methods 0.000 abstract description 10
- 239000003960 organic solvent Substances 0.000 abstract description 7
- 238000005507 spraying Methods 0.000 abstract description 4
- 239000004568 cement Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 230000003137 locomotive effect Effects 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 150000005846 sugar alcohols Polymers 0.000 abstract 1
- 239000002345 surface coating layer Substances 0.000 abstract 1
- 230000001988 toxicity Effects 0.000 abstract 1
- 231100000419 toxicity Toxicity 0.000 abstract 1
- 239000002585 base Substances 0.000 description 17
- 239000000047 product Substances 0.000 description 7
- 239000007787 solid Substances 0.000 description 7
- 239000012855 volatile organic compound Substances 0.000 description 7
- 238000004132 cross linking Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M acrylate group Chemical group C(C=C)(=O)[O-] NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 231100000171 higher toxicity Toxicity 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- VGQXTTSVLMQFHM-UHFFFAOYSA-N peroxyacetyl nitrate Chemical compound CC(=O)OO[N+]([O-])=O VGQXTTSVLMQFHM-UHFFFAOYSA-N 0.000 description 1
- 238000006552 photochemical reaction Methods 0.000 description 1
- -1 polysiloxane Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/62—Polymers of compounds having carbon-to-carbon double bonds
- C08G18/6216—Polymers of alpha-beta ethylenically unsaturated carboxylic acids or of derivatives thereof
- C08G18/625—Polymers of alpha-beta ethylenically unsaturated carboxylic acids; hydrolyzed polymers of esters of these acids
-
- 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
- C09D7/20—Diluents or solvents
-
- 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
- C09D7/63—Additives non-macromolecular organic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to a waterborne polyurethane high-gloss 2K coating and a preparation method.The waterborne polyurethane high-gloss 2K coating comprises a basic coating and a cross-linking agent, the basic coating is prepared from polyacrylic polyhydric alcohol dispersoid serving as film forming matter, pigments, auxiliaries and water, and water-soluble polyisocyanate is adopted as the cross-linking agent.The waterborne coating is low in VOC and toxicity, no fire danger exists during construction, the basic coating and the cross-linking agent are mixed and cross-linked to form a film, and the very good protection effect on locomotives, track traffic, engineering machinery, steel structures, cement bridge piers and the like can be achieved; the coating is mainly used for playing a decorative role in outer surface coating layers of the track traffic, the engineering machinery and automobiles and has the most important advantages that the coating can be prepared into diluent with water, and 30%-40% of organic solvent needs to be added during spraying compared with a solvent type coating; when the coating is prepared into the diluent with the water, the VOC emission amount is greatly decreased in the spraying process, and the coating is an environment-friendly coating.
Description
Technical Field
The invention relates to a waterborne polyurethane high-gloss 2K coating and a preparation method thereof, the coating mainly plays a decorative role in exterior coatings of rail transit, engineering machinery and automobiles, deionized water is used as a diluent instead of an organic solvent, the pollution of the coating to the environment in the construction process is reduced, and resources are saved.
Background
The solvent content of the traditional solvent-based paint is usually more than 40%, the solvent content of some paints such as nitrolacquer during construction is as high as 80%, the solvent content of solvent-based metal colored paint for automobile coating is as high as 85%, according to statistics, 90% of air pollution caused by organic solvent comes from the solvent used in the paint and the ink, the yield of the solvent-based paint in 2010 in China is more than 700 ten thousand tons, and the discharge capacity of VOC is about 300 ten thousand tons. VOCs undergo a plurality of chemical reactions under the action of sunlight to form secondary pollutants with higher toxicity, such as ozone, aldehydes, peroxyacetyl nitrate and the like. The special mixture composed of these nitrogen oxides, hydrocarbon compounds and their intermediate products of photochemical reaction is photochemical smog, and the generation of ozone is the sign of photochemical smog. It follows that VOC emissions from coatings have become an important pollutant that needs to be addressed urgently.
Disclosure of Invention
The invention aims to overcome the defects and provide a preparation method of the waterborne polyurethane high-gloss 2K coating, which uses water to replace an organic solvent and reduces the discharge amount of VOC.
The technical scheme of the invention is as follows: a preparation method of a waterborne polyurethane high-gloss 2K coating is mainly characterized in that the waterborne polyurethane high-gloss 2K coating comprises a base coating and a cross-linking agent, and is prepared from the following raw materials and steps:
(1) the base paint in the waterborne polyurethane high-gloss 2K paint comprises the following raw materials in parts by weight:
the values between the two end points of each component are arbitrarily selected;
wherein,
the film forming material is polyacrylic acid polyol dispersoid;
the pigment comprises organic and inorganic pigments of various colors;
the dispersing agent is a polymer solution containing pigment affinity groups;
a defoamer polyether siloxane copolymer emulsion;
the wetting agent is a nonionic surfactant;
the rheological additive is a nonionic polyurethane thickener;
aqueous acrylic acid leveling agent of leveling agent
The diluent is deionized water;
(2) the crosslinking agent in the waterborne polyurethane high-gloss 2K coating comprises the following components in parts by weight:
15-25 parts of a crosslinking agent;
the cross-linking agent is water-soluble polyisocyanate;
(3) the ratio of the cross-linking agent to the waterborne polyurethane high-gloss 2K coating base coating is 100: 15-25;
the steps are as follows:
preparing a basic paint of the waterborne polyurethane high-gloss 2K paint:
(1) and stirring: mixing 1/3 of the defoaming agent, the dispersing agent and part of the diluent raw materials according to the weight ratio, putting the mixture into a dispersing machine, and stirring at a low speed of 300 revolutions per minute for 5 minutes to obtain a first mixed solution; then according to the weight ratio, uniformly stirring and dispersing the coloring pigment and the first mixed solution at a high speed, wherein the high-speed stirring rotating speed is 800 revolutions per minute, and the stirring time is 5 minutes, so as to obtain a second mixed solution; then, according to the weight ratio, uniformly stirring and dispersing the polyacrylic polyol dispersoid and the second mixed solution at a low speed, wherein the low-speed stirring rotating speed is 300 revolutions per minute, and the stirring and dispersing time is 20 minutes to obtain a third mixed solution;
(2) and grinding: pumping the third mixed solution into a grinder by using an air pump for grinding until the fineness is less than or equal to 20 mu m, and discharging;
(3) size mixing: mixing and dispersing the rest defoamer, wetting agent, flatting agent, rheological additive and water uniformly according to the weight ratio of the ground slurry, and packaging the mixture by using a plastic barrel for later use;
(II) the cross-linking agent is water-soluble polyisocyanate, and is packaged by a plastic barrel for later use;
(III) preparing the waterborne polyurethane high-gloss 2K coating: when the coating is used, mixing the base coating and water-soluble polyisocyanate according to the weight ratio, namely 100: 15-25 parts of the base coating and the cross-linking agent; the two components are uniformly mixed, so that the waterborne polyurethane high-gloss 2K coating is obtained.
The waterborne polyurethane high-gloss 2K coating is prepared by the method.
The main action mechanism of the waterborne polyurethane high-gloss 2K coating is as follows: the curing mechanism of the polyurethane system is a cross-linking and curing process of the polyurethane polyol dispersion particles and the cross-linking agent through evaporation of water, coalescence of the polyurethane polyol dispersion particles, diffusion of the cross-linking agent.
The waterborne polyurethane high-gloss 2K coating provided by the invention uses deionized water as a diluent instead of an organic solvent in a traditional solvent-based coating, so that the volatilization of the organic solvent is reduced, and the pollution to the atmosphere in the coating construction process is reduced.
The invention relates to a water-based polyurethane high-gloss 2K coating, which adopts polyurethane polyol dispersoid to form a coating film through crosslinking of the polyurethane polyol dispersoid and water-soluble polyisocyanate, and utilizes the characteristics of polyurethane, (1) improving the physical and mechanical properties of the coating film, increasing the crosslinking density, improving the compactness of the coating film, increasing the hardness and the flexibility, and (2) improving the water resistance of the coating film. (3) Improve the flame retardancy of the coating film. (4) Sterilizing and cleaning the soil. (5) The weather resistance is improved.
In conclusion, the coating with low VOC and low toxicity is free from fire hazard during construction, can play a good protection role for railway locomotives, rail transit, engineering machinery, steel structures, cement piers and the like by mixing and crosslinking the basic coating and the crosslinking agent to form a film, is mainly used for playing a decorative role for exterior coatings of rail transit, engineering machinery and automobiles, and is mainly characterized in that water is used as a diluent, 30-40% of organic solvent is required to be added in the spraying process relative to solvent-based coatings, and the water is used as the diluent, so that the discharge amount of VOC is greatly reduced in the spraying process, and the coating is an environment-friendly coating.
Drawings
The attached figure is a production process flow chart of the waterborne polyurethane high-gloss 2K coating
Detailed Description
Referring to the attached drawings, the preparation method of the waterborne polyurethane high-gloss 2K coating is mainly characterized in that the waterborne polyurethane high-gloss 2K coating comprises a base coating and a cross-linking agent, and is prepared from the following raw materials and steps:
(1) the base paint in the waterborne polyurethane high-gloss 2K paint comprises the following raw materials in parts by weight:
the values between the two end points of each component are arbitrarily selected;
wherein,
the film forming material is polyacrylic acid polyol dispersoid;
the pigment comprises organic and inorganic pigments of various colors;
the dispersing agent is a polymer solution containing pigment affinity groups;
a defoamer polyether siloxane copolymer emulsion;
the wetting agent is a nonionic surfactant;
the rheological additive is a nonionic polyurethane thickener;
aqueous acrylic acid leveling agent of leveling agent
The diluent is deionized water;
(2) the crosslinking agent in the waterborne polyurethane high-gloss 2K coating comprises the following components in parts by weight: 15-25 parts of cross-linking agent water-soluble polyisocyanate;
the cross-linking agent is water-soluble polyisocyanate;
(3) the base paint of the waterborne polyurethane highlight 2K paint is a cross-linking agent of 100: 15-25;
the steps are as follows:
preparing a basic paint of the waterborne polyurethane high-gloss 2K paint:
(1) and stirring: mixing 1/3 of defoaming agent, dispersing agent and part of water according to the weight ratio, putting the mixture into a dispersing machine for low-speed stirring, wherein the low-speed stirring speed is 300 revolutions per minute, and the stirring and dispersing time is 5 minutes to obtain a first mixed solution; then according to the weight ratio, uniformly stirring and dispersing the coloring pigment and the first mixed solution at a high speed, wherein the high-speed stirring rotating speed is 800 revolutions per minute, and the stirring time is 5 minutes, so as to obtain a second mixed solution; then, according to the weight ratio, uniformly stirring and dispersing the polyacrylic polyol dispersoid and the second mixed solution at a low speed, wherein the low-speed stirring rotating speed is 300 revolutions per minute, and the stirring and dispersing time is 20 minutes to obtain a third mixed solution;
(2) and grinding: pumping the third mixed solution into a grinder by using an air pump for grinding until the fineness is less than or equal to 20 mu m, and discharging;
(3) size mixing: mixing and dispersing the rest defoamer, wetting agent, flatting agent, rheological additive and water uniformly according to the weight ratio of the ground slurry, and packaging the mixture by using a plastic barrel for later use;
(II) the cross-linking agent is water-soluble polyisocyanate, and is packaged by a plastic barrel for later use;
thirdly), preparing the waterborne polyurethane high-gloss 2K coating: when the paint is used, the base paint and the cross-linking agent are mixed according to the weight ratio, namely the base paint and the cross-linking agent are 100: 15-25; the two components are uniformly mixed, so that the waterborne polyurethane high-gloss 2K coating is obtained.
The waterborne polyurethane high-gloss 2K coating is prepared by the method. When in construction, deionized water is added for dilution and then the mixture is sprayed on a protected product.
The waterborne polyurethane high-gloss 2K coating is obtained by the preparation method. The coating is mainly used for replacing the traditional solvent type decorative coating, has the effects of isolating substances such as air, water vapor, acid, alkali and the like from metal and cement, corroding a substrate and achieving the decorative protection effect. And water is used as a diluent, so that the VOC emission is reduced, and the resources are saved.
The technical parameters of the invention are as follows:
the basic states of the raw material components of the waterborne polyurethane high-gloss 2K coating are as follows:
the film-forming material: aqueous polyacrylic polyol dispersion (homemade, 50% solids content).
The pigment is as follows: imported or domestic organic and inorganic colouring pigments.
The dispersant is a polymer solution containing pigment affinity groups (Germany Digao, solid content 40%).
The defoaming agent is polyether siloxane copolymer (Germany Digao, solid content 100%) and polysiloxane mixture (Bike chemical, solid content 97%).
The rheological additive is nonionic polyurethane associative thickener liquid (Germany Digao, solid content 60%).
The leveling agent is an acrylate leveling agent (created in France, solid content is 100%).
The wetting agent is a nonionic surfactant (German digao, solid content 100%).
The diluent is deionized water (self-produced).
The following are specific embodiments of the present invention:
example one
The base paint in the waterborne polyurethane highlight 2K paint comprises the following raw materials in parts by weight:
the sum of the raw materials of the basic coating is 100 parts, the raw materials are fed according to the production process requirements, dispersed and ground to prepare a finished product, and the finished product is filtered and packaged by a plastic barrel.
17 parts of waterborne polyurethane highlight 2K coating cross-linking agent;
and (2) mixing 100 parts of a cross-linking agent and 17 parts of a waterborne polyurethane highlight 2K coating base coating, and adding deionized water for diluting uniformly during construction, so that construction can be carried out.
Example two
The base paint in the waterborne polyurethane highlight 2K paint comprises the following raw materials in parts by weight:
the sum of the raw materials of the basic coating is 100 parts, the raw materials are fed according to the production process requirements, dispersed and ground to prepare a finished product, and the finished product is filtered and packaged by a plastic barrel.
19 parts of waterborne polyurethane highlight 2K coating cross-linking agent;
and (3) mixing the 100 parts of the waterborne polyurethane highlight 2K coating base coating and 19 parts of the cross-linking agent, and adding deionized water for diluting uniformly during construction to construct the waterborne polyurethane highlight 2K coating base coating.
Example three
The base paint in the waterborne polyurethane highlight 2K paint comprises the following raw materials in parts by weight:
the sum of the raw materials of the basic coating is 100 parts, the raw materials are fed according to the production process requirements, dispersed and ground to prepare a finished product, and the finished product is filtered and packaged by a plastic barrel.
21 parts of waterborne polyurethane highlight 2K coating cross-linking agent;
the waterborne polyurethane highlight 2K coating base coating is prepared by mixing 21 parts of a cross-linking agent (100 parts), and adding deionized water for dilution during construction.
Claims (2)
1. The preparation method of the waterborne polyurethane high-gloss 2K coating is characterized in that the waterborne polyurethane high-gloss 2K coating comprises a base coating and a cross-linking agent, and is prepared from the following raw materials and steps:
(1) the base paint in the waterborne polyurethane high-gloss 2K paint comprises the following raw materials in parts by weight:
the values between the two end points of each component are arbitrarily selected;
wherein,
the film forming material is polyacrylic acid polyol dispersoid;
the pigment comprises organic and inorganic pigments of various colors;
the dispersing agent is a polymer solution containing pigment affinity groups;
a defoamer polyether siloxane copolymer emulsion;
the wetting agent is a nonionic surfactant;
the rheological additive is a nonionic polyurethane thickener;
a leveling agent, namely a water-based acrylic leveling agent;
the diluent is deionized water;
(2) the crosslinking agent in the waterborne polyurethane high-gloss 2K coating comprises the following components in parts by weight:
15-25 parts of a cross-linking agent,
the cross-linking agent is water-soluble polyisocyanate resin;
(3) the base paint of the waterborne polyurethane high-gloss 2K paint is a cross-linking agent of 100: 15-25;
the steps are as follows:
preparing a base coating in the waterborne polyurethane high-gloss 2K coating:
(1) and stirring: mixing 1/3 of the defoaming agent, the dispersing agent and part of the diluent raw materials according to the weight ratio, putting the mixture into a dispersing machine, and stirring at a low speed of 300 revolutions per minute for 5 minutes to obtain a first mixed solution; then according to the weight ratio, uniformly stirring and dispersing the coloring pigment and the first mixed solution at a high speed, wherein the high-speed stirring rotating speed is 800 revolutions per minute, and the stirring time is 5 minutes, so as to obtain a second mixed solution; then, according to the weight ratio, uniformly stirring and dispersing the polyacrylic polyol dispersoid and the second mixed solution at a low speed, wherein the low-speed stirring rotating speed is 300 revolutions per minute, and the stirring and dispersing time is 20 minutes to obtain a third mixed solution;
(2) and grinding: pumping the third mixed solution into a grinder by using an air pump for grinding until the fineness is less than or equal to 20 mu m, and discharging;
(3) size mixing: mixing and dispersing the rest defoamer, wetting agent, flatting agent, rheological additive and water uniformly according to the weight ratio of the ground slurry, and packaging the mixture by using a plastic barrel for later use;
(II) the cross-linking agent is water-soluble polyisocyanate, and is packaged by a plastic barrel for later use;
(III) preparing the waterborne polyurethane high-gloss 2K coating: when the coating is used, the base coating and a cross-linking agent (water-soluble polyisocyanate) are mixed according to the weight ratio, namely the base coating and the cross-linking agent are 100: 15-25; the two components are uniformly mixed, so that the waterborne polyurethane high-gloss 2K coating is obtained.
2. An aqueous polyurethane high gloss 2K coating prepared by the method of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610185883.7A CN105802463A (en) | 2016-03-29 | 2016-03-29 | Waterborne polyurethane high-gloss 2K coating and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610185883.7A CN105802463A (en) | 2016-03-29 | 2016-03-29 | Waterborne polyurethane high-gloss 2K coating and preparation method thereof |
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| CN105802463A true CN105802463A (en) | 2016-07-27 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106590387A (en) * | 2016-12-15 | 2017-04-26 | 成都市迈拓新型建材有限公司 | Waterborne polyurethane finishing paint as well as preparation method and application thereof |
| CN108129970A (en) * | 2017-12-25 | 2018-06-08 | 哈尔滨工业大学 | Big aqueous polyurethane coating of a kind of minimum blistering thickness and preparation method thereof |
| CN108148494A (en) * | 2017-12-26 | 2018-06-12 | 株洲市九华新材料涂装实业有限公司 | A kind of urban rail and multiple unit train body double-component aqueous acroleic acid polyurethane selfreparing bloom varnish and preparation method thereof |
| CN108219646A (en) * | 2018-01-05 | 2018-06-29 | 东来涂料技术（上海）股份有限公司 | One kind can selfreparing aqueous automobile repairing varnish and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102363695A (en) * | 2011-06-30 | 2012-02-29 | 成都倍大涂料有限公司 | Aqueous two-component clear paint and preparation method thereof |
| CN102363697A (en) * | 2011-06-30 | 2012-02-29 | 成都倍大涂料有限公司 | Waterborne double-component dull finishing type finish paint and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102363695A (en) * | 2011-06-30 | 2012-02-29 | 成都倍大涂料有限公司 | Aqueous two-component clear paint and preparation method thereof |
| CN102363697A (en) * | 2011-06-30 | 2012-02-29 | 成都倍大涂料有限公司 | Waterborne double-component dull finishing type finish paint and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106590387A (en) * | 2016-12-15 | 2017-04-26 | 成都市迈拓新型建材有限公司 | Waterborne polyurethane finishing paint as well as preparation method and application thereof |
| CN108129970A (en) * | 2017-12-25 | 2018-06-08 | 哈尔滨工业大学 | Big aqueous polyurethane coating of a kind of minimum blistering thickness and preparation method thereof |
| CN108148494A (en) * | 2017-12-26 | 2018-06-12 | 株洲市九华新材料涂装实业有限公司 | A kind of urban rail and multiple unit train body double-component aqueous acroleic acid polyurethane selfreparing bloom varnish and preparation method thereof |
| CN108148494B (en) * | 2017-12-26 | 2020-08-25 | 株洲市九华新材料涂装实业有限公司 | Double-component water-based acrylic polyurethane self-repairing high-gloss varnish for urban rails and motor train bodies and preparation method thereof |
| CN108219646A (en) * | 2018-01-05 | 2018-06-29 | 东来涂料技术（上海）股份有限公司 | One kind can selfreparing aqueous automobile repairing varnish and preparation method thereof |
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