CN110746870A - High-performance water-based acrylic polyurethane two-component coating - Google Patents
High-performance water-based acrylic polyurethane two-component coating Download PDFInfo
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- CN110746870A CN110746870A CN201911012864.4A CN201911012864A CN110746870A CN 110746870 A CN110746870 A CN 110746870A CN 201911012864 A CN201911012864 A CN 201911012864A CN 110746870 A CN110746870 A CN 110746870A
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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
- 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
- C08G18/622—Polymers of esters of alpha-beta ethylenically unsaturated carboxylic acids
- C08G18/6225—Polymers of esters of acrylic or methacrylic acid
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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
- C09D7/65—Additives macromolecular
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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Abstract
The invention relates to a high-performance water-based acrylic polyurethane two-component coating which is high in gloss, fullness, weather resistance and decoration and can improve the appearance value of a workpiece, and the coating is composed of a main agent and a curing agent, wherein the mass ratio of the main agent to the curing agent is 3-8: 1, the curing agent is hydrophilic aliphatic polyisocyanate, and the main agent comprises the following components in parts by weight: 30-70 parts of polymer emulsion, 0.1-5 parts of surface additive, 1-15 parts of film forming additive, 0.1-2 parts of anti-settling agent, 0.1-1 part of thickening agent, 5-30 parts of pigment and filler, 1-5 parts of organic silicon dispersion, 1-5 parts of ultraviolet absorbent and 20-30 parts of deionized water, wherein the curing agent comprises: 60-80 parts of isocyanate curing agent and 20-40 parts of PMA, the waterborne acrylic-polyurethane two-component finishing paint is enhanced in the aspects of polymer emulsion, organic silicon dispersion and auxiliary agent, the water resistance, weather resistance, chemical resistance, hardness and wear resistance of the waterborne acrylic-polyurethane two-component finishing paint are greatly improved, and the preparation method is suitable for mass production.
Description
Technical Field
The invention relates to a water-based industrial coating, in particular to a high-performance water-based acrylic polyurethane two-component coating which has the advantages of high gloss, high fullness, high weather resistance and high decoration and can improve the appearance value of a workpiece.
Background
The traditional solvent-based paint can release a large amount of volatile organic compounds in the film forming process, and causes pollution to the environment. The water-based industrial paint is an environment-friendly industrial paint, reduces the pollution to the atmosphere due to low VOC emission, reduces the dangers of flammability, explosiveness and the like in the transportation and storage processes, and improves the construction safety. Compared with solvent-based coatings, the water-based paint has great superiority in energy conservation and environmental protection. However, the existing water-based paint still has technical defects, such as poor gloss, fullness, weather resistance and water resistance of a paint film, and the existing water-based paint in the market has single function and poor stability, and greatly limits the popularization and application of the water-based paint.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the high-performance water-based acrylic polyurethane two-component coating which is reinforced in the aspects of hydroxyl acrylate dispersion emulsion, organic silicon dispersion and auxiliary agents, can greatly reduce the cost and is also suitable for mass production.
The invention is realized by the following technical scheme:
the high-performance water-based acrylic polyurethane two-component coating comprises a main agent and a curing agent, wherein the mass ratio of the main agent to the curing agent is 3-8: 1, the curing agent is hydrophilic aliphatic polyisocyanate, and the main agent comprises the following components in parts by weight: 30-70 parts of polymer emulsion, 0.1-5 parts of surface additive, 1-15 parts of film forming additive, 0.1-2 parts of anti-settling agent, 0.1-1 part of thickening agent, 5-30 parts of pigment and filler, 1-5 parts of organic silicon dispersion, 1-5 parts of ultraviolet absorbent and 20-30 parts of deionized water, wherein the curing agent comprises the following components in parts by weight: 60-80 parts of isocyanate curing agent and 20-40 parts of PMA.
The polymer emulsion is one or two combinations of hydroxyl-containing acrylate dispersoid and self-crosslinking hydroxyl acrylate dispersoid, and the pH value is 7.0-9.0.
The organic silicon dispersion is one or more of a hybrid silicon dispersion and a silica sol.
The surface auxiliary agent is at least one or a combination of a plurality of water-based organic silicon defoaming agent, a dispersing agent and a flatting agent base material wetting agent.
The ultraviolet absorbent is at least one or the combination of two of an ultraviolet absorbent and an ultraviolet stabilizer.
The film-forming auxiliary agent is one or a combination of alcohol ether and alcohol ester film-forming substances.
The anti-settling agent is at least one of fumed silica and organic bentonite.
The thickening agent is a polyurethane associative rheological aid.
The pigment and filler is at least one of titanium white, carbon black, scarlet, phthalocyanine blue and phthalocyanine green organic or inorganic pigment and filler.
A preparation method of the high-performance water-based acrylic polyurethane two-component coating comprises the following steps:
the first step is as follows: preparation of the main agent:
step 1), in a dispersing device, ensuring the dispersing speed to be 500r/min, sequentially adding a polymer emulsion, an organic silicon dispersion and a pigment filler according to the formula weight, and dispersing at a high speed for 20-30 min;
step 2), transferring the dispersed slurry into grinding equipment, ensuring that the rotating speed is 2000-4000r/min and the grinding fineness reaches below 10 mu m, and then transferring the slurry into the dispersing equipment;
step 3), sequentially adding the rest deionized water, the film-forming aid, the surface aid, the ultraviolet absorbent, the anti-settling agent and the thickening agent into the slurry at the stirring speed of 1000 r/min for high-speed dispersion to a uniform and stable state;
step 4), sampling and testing basic performance;
the second step is that: preparation of the curing agent:
accurately weighing, mixing and dispersing the isocyanate curing agent and the PMA according to the formula weight, and uniformly dispersing;
the third step: packaging: separately packaging the main agent and the curing agent according to the weight of the formula, and then packaging the finished product.
The invention has the following beneficial effects:
1. the polymer emulsion is one or two combinations of hydroxyl-containing acrylate dispersoid and self-crosslinking hydroxyl acrylate dispersoid, and the compound of the hydroxyl-containing acrylate dispersoid and the self-crosslinking hydroxyl acrylate dispersoid is used as a film-forming substance; the organic silicon dispersoid is an organic and inorganic polymerization hybrid silicon dispersoid, belongs to a novel artificially synthesized functional polymer material, and is prepared into a coating by matching the silicon solution dispersoid with pigment and various assistants, when the silicon solution loses moisture, monomer silicic acid is gradually polymerized into high polymer silica gel, and colloid molecules are increased along with the evaporation of the moisture, and finally a-SIO-O-SIO-coating film is formed: IO-SI-OH + HO-SI-OH has certain film-forming dissolution characteristics due to the low content of NA2O in the silica sol. The coating is compact and hard, does not generate static electricity, can enhance the wear resistance of the coating, improve the light resistance and weather resistance of the coating, and improve the stain resistance, water resistance and heat resistance of the coating.
2. The invention enhances the aspects of emulsion, organic silicon dispersoid and auxiliary agent, and greatly improves the resistance of a paint film by adding a proper amount of organic silicon dispersoid, silica sol, ultraviolet absorbent, ultraviolet stabilizer and the like. Preferably, compared with the domestic hydroxyl acrylate dispersion with the same solid content and hydroxyl content, the imported hydroxyl acrylate dispersion and the domestic hydroxyl acrylate dispersion have the same solid content and hydroxyl content, so that the product cost is reduced.
The water-based acrylic acid-polyurethane two-component finishing paint is enhanced in the aspects of polymer emulsion, organic silicon dispersoid and auxiliary agent, the water resistance, weather resistance, chemical resistance, hardness and wear resistance of the water-based acrylic acid-polyurethane two-component finishing paint are greatly improved, and the preparation method is suitable for mass production.
Detailed Description
For a better understanding of the present invention, the technical solutions and properties of the present invention will be described in detail below with reference to specific examples.
Example 1: a high-performance water-based acrylic polyurethane two-component coating comprises a main agent and a water-based polyurethane curing agent in a mass ratio of 5:1,
the main agent comprises the following components in parts by weight (the total amount of the formula is 100 g):
60g of polymer emulsion (DIC 570), 5g of organosilicon dispersion (MOBRID 511), 2g of conventional surface additive (TEGO 8207604100), 5g of film-forming additive (DOW DPM DPNB), 20g of pigment filler (DUPONT706), 1g of ultraviolet absorber (BASF1130), 20g of deionized water, 1g of anti-settling agent (AQ633E) and 1g of thickener (RHEOLATE 299);
the curing agent comprises the following components in parts by weight (the total amount of the formula is 100 g):
80 g of isocyanate curing agent (2655) and 20g of PMA (DOW).
A preparation method of a high-performance water-based acrylic polyurethane two-component coating comprises the following steps:
the first step is as follows: preparation of the main agent:
step 1), in a dispersing device, ensuring the dispersing speed to be 500r/min, sequentially adding a polymer emulsion, an organic silicon dispersion and a pigment filler according to the formula weight, and dispersing at a high speed for 20-30 min;
step 2), transferring the dispersed slurry into grinding equipment, ensuring that the rotating speed is 2000-4000r/min and the grinding fineness reaches below 10 mu m, and then transferring the slurry into the dispersing equipment;
step 3), sequentially adding the rest deionized water, the film-forming aid, the surface aid, the ultraviolet absorbent, the anti-settling agent and the thickening agent into the slurry at the stirring speed of 1000 r/min for high-speed dispersion to a uniform and stable state;
step 4), sampling and testing basic performance;
the second step is that: preparation of the curing agent:
accurately weighing, mixing and dispersing the isocyanate curing agent and the PMA according to the formula weight, and uniformly dispersing;
the third step: packaging: separately packaging the main agent and the curing agent according to the weight of the formula, and then packaging the finished product.
Example 2: a high-performance water-based acrylic polyurethane two-component coating comprises a main agent and a water-based polyurethane curing agent in a mass ratio of 5:1,
the main agent comprises the following components in parts by mass (the total amount of the formula is calculated by 100 g)
60g of polymer emulsion (XK540), 5g of organosilicon dispersion (MOBRID 511), 2g of conventional surface additive (TEGO 8207604100), 5g of film-forming additive (DOW DPM DPNB), 20g of pigment and filler (DUPONT706),
1g of ultraviolet light absorber (BASF1130), 25g of deionized water, 1g of anti-settling agent (AQ633E) and 1g of thickener (RHEOLATE 299).
The curing agent comprises the following components (the total amount of the formula is 100 g) by weight:
80 g of isocyanate curing agent (2655) and 20g of PMA (DOW).
The preparation method is the same as example 1.
Example 3: a high-performance water-based acrylic polyurethane two-component coating comprises a main agent and a water-based polyurethane curing agent in a mass ratio of 5:1,
the main agent comprises the following components in parts by mass (the total amount of the formula is 100 g):
60g of polymer emulsion (2470), 5g of silicone dispersion (MOBRID 511), 2g of conventional surface additive (TEGO 8207604100), 5g of film-forming additive (DOW DPM DPNB), 20g of pigment filler (DUPONT706), 1g of ultraviolet absorber (BASF1130), 30g of deionized water, 2g of anti-settling agent (AQ633E) and 1g of thickener (RHEOLATE 299).
The curing agent comprises the following components (the total amount of the formula is 100 g) by weight:
80 g of isocyanate curing agent and 20g of PMA (DOW).
The preparation method is the same as example 1.
Example 4: a high-performance water-based acrylic polyurethane two-component coating comprises a main agent and a water-based polyurethane curing agent in a mass ratio of 5:1,
the main agent comprises the following components in parts by mass (the total amount of the formula is 100 g):
60g of domestic hydroxypropyl dispersion emulsion A, 5g of organosilicon dispersion (MOBRID 511), 2g of conventional auxiliary agent (TEGO 8207604100), 5g of film-forming auxiliary agent (DOW DPM DPNB), 20g of pigment filler (DUPONT706),
2g of ultraviolet light absorber (BASF1130), 20g of deionized water, 2g of anti-settling agent (AQ633E), 1g of thickening agent (RHEOLATE299),
The curing agent comprises the following components (the total amount of the formula is 100 g) in percentage by mass:
80 g of isocyanate curing agent (2655) and 20g of PMA (DOW).
Example 5: a high-performance water-based acrylic polyurethane two-component coating comprises a main agent and a water-based polyurethane curing agent in a mass ratio of 5:1,
the mass ratio of the main agent to the waterborne polyurethane curing agent is 5:1, and the components and the mass part ratio of the main agent are as follows (the total amount of the formula is 100 g):
60g of domestic hydroxypropyl dispersion emulsion B, 5g of silicone dispersion (MOBRID 511), 2g of conventional surface additive (TEGO 8207604100), 15g of film-forming additive (DOW DPM DPNB), 30g of pigment filler (DUPONT706), 5g of ultraviolet absorber (BASF1130), 25g of deionized water, 2g of anti-settling agent (AQ633E) and 1g of thickener (RHEOLATE 299).
The curing agent comprises the following components (the total amount of the formula is 100 g) in percentage by mass:
isocyanate curing agent (2655) 70 g, PMA (DOW) 30 g.
The preparation method is the same as example 1.
Example 6: a high-performance water-based acrylic polyurethane two-component coating comprises a main agent and a water-based polyurethane curing agent in a mass ratio of 5:1,
the main agent comprises the following components in parts by mass (the total amount of the formula is 100 g):
60g of domestic hydroxypropyl dispersion emulsion C, 4g of silicone dispersion (MOBRID 511), 2g of conventional surface additive (TEGO 8207604100), 5g of film-forming additive (DOW DPM DPNB), 20g of pigment filler (DUPONT706), 2g of ultraviolet absorber (BASF1130), 22g of deionized water, 1g of anti-settling agent (AQ633E) and 1g of thickener (RHEOLATE 299).
The curing agent comprises the following components (the total amount of the formula is 100 g) in percentage by mass:
60g of isocyanate curing agent (2655) and 40 g of PMA (DOW).
The preparation method is the same as example 1.
The water-based two-component topcoat is adopted to respectively manufacture coatings of 45 +/-5 mm, leveling is carried out for 10min, 80-degree C baking is carried out for 30min, and normal-temperature maintenance is carried out for 7 d. The tested coating properties are shown in table 1:
the following detection methods all adopt national standard detection methods.
The test results for examples 1-6 are given in the following table:
Claims (10)
1. the high-performance water-based acrylic polyurethane two-component coating is characterized by comprising a main agent and a curing agent, wherein the mass ratio of the main agent to the curing agent is 3-8: 1, the curing agent is hydrophilic aliphatic polyisocyanate, and the main agent comprises the following components in parts by weight: 30-70 parts of polymer emulsion, 0.1-5 parts of surface additive, 1-15 parts of film forming additive, 0.1-2 parts of anti-settling agent, 0.1-1 part of thickening agent, 5-30 parts of pigment and filler, 1-5 parts of organic silicon dispersion, 1-5 parts of ultraviolet absorbent and 20-30 parts of deionized water, wherein the curing agent comprises the following components in parts by weight: 60-80 parts of isocyanate curing agent and 20-40 parts of PMA.
2. The high-performance water-based acrylic polyurethane two-component coating as claimed in claim 1, wherein the polymer emulsion is one or a combination of two of hydroxyl-containing acrylate dispersion and self-crosslinking hydroxyl acrylate dispersion, and the pH value is 7.0-9.0.
3. The high-performance water-based acrylic polyurethane two-component coating of claim 1, wherein the silicone dispersion is one or more of a hybrid silicon dispersion and a silica sol.
4. The high-performance water-based acrylic polyurethane two-component coating as claimed in claim 1, wherein the surface auxiliary agent is at least one or more of a water-based silicone defoamer, a dispersant and a leveling agent substrate wetting agent.
5. The high-performance water-based acrylic polyurethane two-component coating material as claimed in claim 1, wherein the ultraviolet absorber is at least one or a combination of two of an ultraviolet absorber and an ultraviolet stabilizer.
6. The high-performance water-based acrylic polyurethane two-component coating as claimed in claim 1, wherein the film forming assistant is one or more of alcohol ether and alcohol ester film forming substances.
7. The high-performance water-based acrylic polyurethane two-component coating according to claim 1, wherein the anti-settling agent is at least one of fumed silica and organic bentonite.
8. The high-performance aqueous acrylic polyurethane two-component coating as claimed in claim 1, wherein the thickener is a polyurethane associative rheological aid.
9. The high-performance water-based acrylic polyurethane two-component coating of claim 1, wherein the pigment and filler is at least one of titanium white, carbon black, scarlet, phthalocyanine blue, phthalocyanine green organic or inorganic pigment and filler.
10. A method for preparing a high-performance aqueous acrylic polyurethane two-component coating according to any one of claims 1 to 10, which comprises the following steps:
the first step is as follows: preparation of the main agent:
step 1), in a dispersing device, ensuring the dispersing speed to be 500r/min, sequentially adding a polymer emulsion, an organic silicon dispersion and a pigment filler according to the formula weight, and dispersing at a high speed for 20-30 min;
step 2), transferring the dispersed slurry into grinding equipment, ensuring that the rotating speed is 2000-4000r/min and the grinding fineness reaches below 10 mu m, and then transferring the slurry into the dispersing equipment;
step 3), sequentially adding the rest deionized water, the film-forming aid, the surface aid, the ultraviolet absorbent, the anti-settling agent and the thickening agent into the slurry at the stirring speed of 1000 r/min for high-speed dispersion to a uniform and stable state;
step 4), sampling and testing basic performance;
the second step is that: preparation of the curing agent:
accurately weighing, mixing and dispersing the isocyanate curing agent and the PMA according to the formula weight, and uniformly dispersing;
the third step: packaging: separately packaging the main agent and the curing agent according to the weight of the formula, and then packaging the finished product.
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Cited By (3)
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| CN112175497A (en) * | 2020-09-30 | 2021-01-05 | 上海顺多防水工程有限公司 | Waterborne polyurethane coating and preparation method thereof |
| CN113755068A (en) * | 2021-09-30 | 2021-12-07 | 成都美中美涂料有限公司 | Tannin-resistant high-performance water-based woodware seal primer and production process thereof |
| CN114736593A (en) * | 2022-03-14 | 2022-07-12 | 雅图高新材料股份有限公司 | High-gloss water-based bi-component finish paint and preparation method and application thereof |
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| CN114736593A (en) * | 2022-03-14 | 2022-07-12 | 雅图高新材料股份有限公司 | High-gloss water-based bi-component finish paint and preparation method and application thereof |
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Application publication date: 20200204 |