CN111454629A - Super-hydrophobic water paint and production process thereof - Google Patents
Super-hydrophobic water paint and production process thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D143/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing boron, silicon, phosphorus, selenium, tellurium, or a metal; Coating compositions based on derivatives of such polymers
- C09D143/04—Homopolymers or copolymers of monomers containing silicon
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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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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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Abstract
The super-hydrophobic water paint comprises the following components in parts by weight: 25-35% of silicone-acrylic emulsion, 10-20% of fluorocarbon resin, 15-25% of nano calcium carbonate, 10-20% of emulsifier, 2-3% of film-forming assistant, 0.1-0.3% of dispersant, 0.5-1.0% of base material wetting agent, 0.5-1.0% of defoamer, 0.5-1.5% of rheological assistant and 10-20% of deionized water. The silicone-acrylic emulsion is a conventional silicone-acrylic emulsion used for building coatings, the fluorocarbon resin is acrylic resin of a water-soluble fluorine-containing monomer, and the nano calcium carbonate is nano precipitated calcium carbonate powder with the particle size of 50-200 nm; the production process comprises five steps of preparation of the modified super-hydrophobic powder filler, premixing, dispersion grinding, paint mixing, packaging and the like.
Description
Technical Field
The invention belongs to the field of paint preparation, and particularly relates to super-hydrophobic water paint and a production process thereof.
Background
As an indispensable important field for the economic development of the national people in China, the coating becomes the second largest coating producing country and consumer country in the world through the tenacious jig and development of several generations, and becomes the mainstream of the world coating industry. The water-based paint is popular due to the advantages of low price, health, environmental protection and the like, but the water-based paint has poor hydrophobicity, so that water easily enters the interior of a paint film to influence the adhesive force between the paint film and a base material, and the paint layer can be seriously peeled off to cause resource waste and economic loss. The prepared water-based paint with good hydrophobicity can effectively avoid the phenomenon that the coating is corroded by water to cause the coating to foam and fall off, and meanwhile, the water-based paint with super-hydrophobicity has a self-cleaning function. However, the preparation of the super-hydrophobic coating has the defects that the nano material is difficult to disperse in water, and expensive low-surface-energy substances are required to be used as a modifier, so that the production cost is too high to be expected by users.
Disclosure of Invention
Aiming at the defects of difficult dispersion of nano materials and high production cost of the water-based super-hydrophobic coating in the prior art, the invention provides a super-hydrophobic water paint and a production process thereof, and the specific technical scheme is as follows:
the super-hydrophobic water paint comprises the following components in parts by weight: 25-35% of silicone-acrylic emulsion, 10-20% of fluorocarbon resin, 15-25% of nano calcium carbonate, 10-20% of emulsifier, 2-3% of film-forming assistant, 0.1-0.3% of dispersant, 0.5-1.0% of base material wetting agent, 0.5-1.0% of defoamer, 0.5-1.5% of rheological assistant and 10-20% of deionized water.
The silicone-acrylate emulsion is a conventional silicone-acrylate emulsion used for building coatings, the solid content is 45-50%, and the glass transition temperature is 25 ℃.
The fluorocarbon resin is acrylic resin of water-soluble fluorine-containing monomer, and the solid content is 50-70%.
The nano calcium carbonate is nano precipitated calcium carbonate powder with the grain size of 50-200 nm.
The emulsifier is two combinations of sodium dodecyl benzene sulfonate, sodium dodecyl sulfonate, sodium oleate and potassium oleate.
The film-forming aid is alcohol ester twelve.
The dispersing agent is sodium tripolyphosphate.
The substrate wetting agent is polyether modified polysiloxane.
The defoaming agent is an organic silicon defoaming agent.
The invention also provides a production process of the super-hydrophobic water paint, which comprises the following steps:
(1) preparing modified super-hydrophobic powder filler: firstly, stirring and mixing nano calcium carbonate and fluorocarbon resin uniformly, and drying and crushing to obtain super-hydrophobic nano calcium carbonate; secondly, dissolving the emulsifier in deionized water, and stirring and dissolving completely to obtain a high-concentration emulsifier solution; then slowly adding the super-hydrophobic nano calcium carbonate, and stirring at low speed to obtain the modified super-hydrophobic powder filler.
(2) Premixing: adding deionized water and various functional additives such as a base material wetting agent, a rheological additive, a dispersing agent, a defoaming agent and the like into a dispersing kettle, and stirring at the speed of 500-1000 rpm for 10-20 minutes to form a uniform colloidal solution;
(3) dispersing and grinding: adding the modified super-hydrophobic powder filler into the colloidal solution, and dispersing for 30-60 minutes at a stirring speed of 1000-2000 rpm to prepare uniform slurry;
(4) paint mixing: adding the silicone-acrylic emulsion and the film forming auxiliary agent into the slurry, and uniformly stirring;
(5) and (6) packaging.
The technical principle of the invention is as follows:
the surface roughness and surface wetting properties of low surface energy materials are closely related to the microstructure of the surface. The preparation of hydrophobic surfaces usually adopts silane or fluorocarbon chains to reduce the surface energy, but researches show that the aim of super-hydrophobic self-cleaning cannot be completely fulfilled by adjusting the surface energy on the smooth object surface by a chemical method. Thus, hydrophobic self-cleaning can be better achieved by constructing suitable micro-roughness structures in conjunction with the introduction of low surface energy species.
Suitable micro-nano surfaces and low surface energy substances are the key to realize hydrophobic self-cleaning. According to the principle of lotus leaf effect self-cleaning, the approaches for realizing hydrophobic self-cleaning mainly comprise two approaches: firstly, a low surface energy substance is modified on a rough surface, and low surface energy materials usually used for preparing a hydrophobic surface mainly comprise polysiloxane, fluorocarbon and other organic substances (such as polyethylene, polystyrene and the like); secondly, a micro-nano rough structure similar to the lotus leaf surface is constructed on the surface of the hydrophobic material, and inorganic nano particles (such as TiO) are prepared by the preparation method2、SiO2ZnO, etc.), laser/plasma/chemical etching, templating, electrospinning, sol-gel, self-assembly, electrochemical deposition, and chemical vapor deposition.
The technical scheme of the invention adopts micro-nano light calcium carbonate powder as a rough surface structure material, firstly the micro-nano light calcium carbonate powder and fluorocarbon resin are bonded together, dried and crushed to prepare nano coarse particles, namely nano powder filler, the nano material is converted into the nano material, then the nano material is mixed and modified by low surface energy substance silicone-acrylate emulsion to prepare the super-hydrophobic coating, and the super-hydrophobic coating is sprayed on the surface of a substrate to form the super-hydrophobic coating with the lotus effect, thereby having the self-cleaning function.
The invention has the following beneficial effects:
(1) the technical scheme of the invention adopts the micro-nano light calcium carbonate powder as a rough surface structure material, firstly the micro-nano light calcium carbonate powder and fluorocarbon resin are bonded together, dried and crushed to prepare nano coarse particles, namely powder filler with nano performance, and the nano material is converted into the nano material, thereby solving the problem that the nano material is difficult to disperse in water.
(2) According to the technical scheme, an expensive low-surface-energy substance is not required to be used as a modifier, so that the production cost of the product is low, and the requirements of common market users can be met.
Drawings
FIG. 1 is a flow chart of the production process of the present invention.
Detailed Description
The invention is further described below with reference to the figures and examples.
The super-hydrophobic water paint comprises the following components in parts by weight: 25-35% of silicone-acrylic emulsion, 10-20% of fluorocarbon resin, 15-25% of nano calcium carbonate, 10-20% of emulsifier, 2-3% of film-forming assistant, 0.1-0.3% of dispersant, 0.5-1.0% of base material wetting agent, 0.5-1.0% of defoamer, 0.5-1.5% of rheological assistant and 10-20% of deionized water.
The silicone-acrylate emulsion is a conventional silicone-acrylate emulsion used for building coatings, the solid content is 45-50%, and the glass transition temperature is 25 ℃.
The fluorocarbon resin is acrylic resin of water-soluble fluorine-containing monomer, and the solid content is 50-70%.
The nano calcium carbonate is nano precipitated calcium carbonate powder with the grain size of 50-200 nm.
The emulsifier is two combinations of sodium dodecyl benzene sulfonate, sodium dodecyl sulfonate, sodium oleate and potassium oleate.
The film-forming aid is alcohol ester twelve.
The dispersing agent is sodium tripolyphosphate.
The substrate wetting agent is polyether modified polysiloxane.
The defoaming agent is an organic silicon defoaming agent.
The invention also provides a production process of the super-hydrophobic water paint, which comprises the following steps:
(1) preparing modified super-hydrophobic powder filler: firstly, stirring and mixing nano calcium carbonate and fluorocarbon resin uniformly, and drying and crushing to obtain super-hydrophobic nano calcium carbonate; secondly, dissolving the emulsifier in deionized water, and stirring and dissolving completely to obtain a high-concentration emulsifier solution; then slowly adding the super-hydrophobic nano calcium carbonate, and stirring at low speed to obtain the modified super-hydrophobic powder filler.
(2) Premixing: adding deionized water and various functional additives such as a base material wetting agent, a rheological additive, a dispersing agent, a defoaming agent and the like into a dispersing kettle, and stirring at the speed of 500-1000 rpm for 10-20 minutes to form a uniform colloidal solution;
(3) dispersing and grinding: adding the modified super-hydrophobic powder filler into the colloidal solution, and dispersing for 30-60 minutes at a stirring speed of 1000-2000 rpm to prepare uniform slurry;
(4) paint mixing: adding the silicone-acrylic emulsion and the film forming auxiliary agent into the slurry, and uniformly stirring;
(5) and (6) packaging.
Example 1
The super-hydrophobic water paint comprises the following components in parts by weight: 30% of silicone-acrylic emulsion, 15% of fluorocarbon resin, 20% of nano calcium carbonate, 15% of emulsifier, 2.5% of film-forming assistant, 0.2% of dispersing agent, 0.75% of base material wetting agent, 0.75% of defoaming agent, 1% of rheological assistant and 14.8% of deionized water.
The silicone-acrylate emulsion is a conventional silicone-acrylate emulsion used for building coatings, the solid content is 45-50%, and the glass transition temperature is 25 ℃.
The fluorocarbon resin is acrylic resin of water-soluble fluorine-containing monomer, and the solid content is 50-70%.
The nano calcium carbonate is nano precipitated calcium carbonate powder with the grain size of 50-200 nm.
The emulsifier is the combination of sodium dodecyl benzene sulfonate and sodium oleate.
The film-forming aid is alcohol ester twelve.
The dispersing agent is sodium tripolyphosphate.
The substrate wetting agent is polyether modified polysiloxane.
The defoaming agent is an organic silicon defoaming agent.
The invention also provides a production process of the super-hydrophobic water paint, which comprises the following steps:
(1) preparing modified super-hydrophobic powder filler: firstly, stirring and mixing nano calcium carbonate and fluorocarbon resin uniformly, and drying and crushing to obtain super-hydrophobic nano calcium carbonate; secondly, dissolving emulsifier sodium dodecyl benzene sulfonate and sodium oleate in deionized water, and stirring and dissolving completely to obtain a high-concentration emulsifier solution; then slowly adding the super-hydrophobic nano calcium carbonate, and stirring at low speed to obtain the modified super-hydrophobic powder filler.
(2) Premixing: adding deionized water, a base material wetting agent, a rheological additive, a dispersing agent, a defoaming agent and other functional additives into a dispersion kettle, and stirring at the speed of 750 revolutions per minute for 30 minutes to form a uniform colloidal solution;
(3) dispersing and grinding: adding the modified super-hydrophobic powder filler into the colloidal solution, and dispersing for 45 minutes at a stirring speed of 1500 rpm to prepare uniform slurry;
(4) paint mixing: adding the silicone-acrylic emulsion and the film forming auxiliary agent into the slurry, and uniformly stirring;
(5) and (6) packaging.
Example 2
The super-hydrophobic water paint comprises the following components in parts by weight: 25% of silicone-acrylic emulsion, 20% of fluorocarbon resin, 25% of nano calcium carbonate, 10% of emulsifier, 2% of film-forming assistant, 0.1% of dispersant, 0.5% of base material wetting agent, 0.5% of defoaming agent, 0.5% of rheological assistant and 16.4% of deionized water.
The silicone-acrylate emulsion is a conventional silicone-acrylate emulsion used for building coatings, the solid content is 45-50%, and the glass transition temperature is 25 ℃.
The fluorocarbon resin is acrylic resin of water-soluble fluorine-containing monomer, and the solid content is 50-70%.
The nano calcium carbonate is nano precipitated calcium carbonate powder with the grain size of 50-200 nm.
The emulsifier is the combination of sodium dodecyl benzene sulfonate and potassium oleate.
The film-forming aid is alcohol ester twelve.
The dispersing agent is sodium tripolyphosphate.
The substrate wetting agent is polyether modified polysiloxane.
The defoaming agent is an organic silicon defoaming agent.
The invention also provides a production process of the super-hydrophobic water paint, which comprises the following steps:
(1) preparing modified super-hydrophobic powder filler: firstly, stirring and mixing nano calcium carbonate and fluorocarbon resin uniformly, and drying and crushing to obtain super-hydrophobic nano calcium carbonate; secondly, dissolving emulsifier sodium dodecyl benzene sulfonate and potassium oleate into deionized water, and stirring and dissolving completely to obtain a high-concentration emulsifier solution; then slowly adding the super-hydrophobic nano calcium carbonate, and stirring at low speed to obtain the modified super-hydrophobic powder filler.
(2) Premixing: adding deionized water and various functional additives such as a base material wetting agent, a rheological additive, a dispersing agent, a defoaming agent and the like into a dispersion kettle, and stirring at the speed of 500 revolutions per minute for 20 minutes to form a uniform colloidal solution;
(3) dispersing and grinding: adding the modified super-hydrophobic powder filler into the colloidal solution, and dispersing for 60 minutes at a stirring speed of 1000 revolutions per minute to prepare uniform slurry;
(4) paint mixing: adding the silicone-acrylic emulsion and the film forming auxiliary agent into the slurry, and uniformly stirring;
(5) and (6) packaging.
Example 3
The super-hydrophobic water paint comprises the following components in parts by weight: 35% of silicone-acrylic emulsion, 10% of fluorocarbon resin, 15% of nano calcium carbonate, 20% of emulsifier, 3% of film-forming assistant, 0.3% of dispersant, 1.0% of base material wetting agent, 1.0% of defoaming agent, 1.5% of rheological assistant and 13.2% of deionized water.
The silicone-acrylate emulsion is a conventional silicone-acrylate emulsion used for building coatings, the solid content is 45-50%, and the glass transition temperature is 25 ℃.
The fluorocarbon resin is acrylic resin of water-soluble fluorine-containing monomer, and the solid content is 50-70%.
The nano calcium carbonate is nano precipitated calcium carbonate powder with the grain size of 50-200 nm.
The emulsifier is the combination of sodium dodecyl sulfate and sodium oleate.
The film-forming aid is alcohol ester twelve.
The dispersing agent is sodium tripolyphosphate.
The substrate wetting agent is polyether modified polysiloxane.
The defoaming agent is an organic silicon defoaming agent.
The invention also provides a production process of the super-hydrophobic water paint, which comprises the following steps:
(1) preparing modified super-hydrophobic powder filler: firstly, stirring and mixing nano calcium carbonate and fluorocarbon resin uniformly, and drying and crushing to obtain super-hydrophobic nano calcium carbonate; secondly, dissolving emulsifier sodium dodecyl sulfate and sodium oleate in deionized water, and stirring and dissolving completely to obtain a high-concentration emulsifier solution; then slowly adding the super-hydrophobic nano calcium carbonate, and stirring at low speed to obtain the modified super-hydrophobic powder filler.
(2) Premixing: adding deionized water, a base material wetting agent, a rheological additive, a dispersing agent, a defoaming agent and other functional additives into a dispersion kettle, and stirring at the speed of 1000 rpm for 10 minutes to form a uniform colloidal solution;
(3) dispersing and grinding: adding the modified super-hydrophobic powder filler into the colloidal solution, and dispersing for 30 minutes at a stirring speed of 2000 rpm to prepare uniform slurry;
(4) paint mixing: adding the silicone-acrylic emulsion and the film forming auxiliary agent into the slurry, and uniformly stirring;
(5) and (6) packaging.
Table 1 shows the super-hydrophobic effect and mechanical property indexes of the coating prepared in the embodiment of the present invention, and the detection of each index is based on the following criteria: the contact angle is measured according to a JC2000C1 sessile drop contact angle/interfacial tension measuring instrument; the water absorption is determined according to GB 1727-79; the adhesion test adopts a Positest AT pull-out type adhesion tester to test the mechanical property of the coating.
Table 1: super-hydrophobic effect and mechanical property of coatings of different embodiments
| Detecting items | Contact angle (degree) | Water absorption percentage% | Adhesion force, MPa | Product storage stability (storage in oven at 50 ℃ C. for 14 days) |
| Example 1 | 156.6 | 1.62 | 5.92 | No sediment and no suspension |
| Example 2 | 153.8 | 1.88 | 6.06 | No sediment and no suspension |
| Example 3 | 151.9 | 1.93 | 6.23 | No sediment and no suspension |
| Enterprise standard | 150 | 2.0 | 5.0 | No sediment and no suspension |
As can be seen from Table 1: the contact angle, the water absorption and the adhesive force of the coating prepared in the embodiments 1-3 of the invention all accord with the standard values of enterprises, particularly the contact angle value reaches the super-hydrophobic standard value of 150 degrees, and the storage stability of the product is good.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design solutions of the present invention should fall into the protection scope defined by the claims of the present invention.
Claims (10)
1. The super-hydrophobic water paint is characterized by comprising the following components in parts by weight: 25-35% of silicone-acrylic emulsion, 10-20% of fluorocarbon resin, 15-25% of nano calcium carbonate, 10-20% of emulsifier, 2-3% of film-forming assistant, 0.1-0.3% of dispersant, 0.5-1.0% of base material wetting agent, 0.5-1.0% of defoamer, 0.5-1.5% of rheological assistant and 10-20% of deionized water.
2. The super-hydrophobic water paint as claimed in claim 1, wherein the silicone-acrylic emulsion is a conventional silicone-acrylic emulsion used for architectural coatings, the solid content is 45-50%, and the glass transition temperature is 25 ℃.
3. The super-hydrophobic water paint as claimed in claim 1, wherein the fluorocarbon resin is acrylic resin of water-soluble fluorine-containing monomer, and the solid content is 50-70%.
4. The super-hydrophobic water paint as claimed in claim 1, wherein the nano calcium carbonate is nano precipitated calcium carbonate powder with a particle size of 50-200 nm.
5. The super-hydrophobic lacquer according to claim 1, wherein the emulsifier is a combination of sodium dodecylbenzene sulfonate, sodium dodecyl sulfonate, sodium oleate, and potassium oleate.
6. The superhydrophobic water paint according to claim 1, wherein the film forming aid is an alcohol ester dodeca.
7. The superhydrophobic water paint according to claim 1, wherein the dispersant is sodium tripolyphosphate.
8. The superhydrophobic water paint according to claim 1, wherein the substrate wetting agent is polyether modified polysiloxane.
9. The superhydrophobic water paint according to claim 1, wherein the defoaming agent is a silicone defoaming agent.
10. A process for producing the superhydrophobic water paint according to claim 1, comprising the steps of: (1) preparing modified super-hydrophobic powder filler: firstly, stirring and mixing nano calcium carbonate and fluorocarbon resin uniformly, and drying and crushing to obtain super-hydrophobic nano calcium carbonate; secondly, dissolving the emulsifier in deionized water, and stirring and dissolving completely to obtain a high-concentration emulsifier solution; slowly adding the super-hydrophobic nano calcium carbonate, and stirring at a low speed to obtain the modified super-hydrophobic powder filler; (2) premixing: adding deionized water and various functional additives such as a base material wetting agent, a rheological additive, a dispersing agent, a defoaming agent and the like into a dispersing kettle, and stirring at the speed of 500-1000 rpm for 10-20 minutes to form a uniform colloidal solution; (3) dispersing and grinding: adding the modified super-hydrophobic powder filler into the colloidal solution, and dispersing for 30-60 minutes at a stirring speed of 1000-2000 rpm to prepare uniform slurry; (4) paint mixing: adding the silicone-acrylic emulsion and the film forming auxiliary agent into the slurry, and uniformly stirring; (5) and (6) packaging.
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| CN112961552A (en) * | 2021-02-04 | 2021-06-15 | 几何智慧城市科技(广州)有限公司 | Water-based super-hydrophobic coating and preparation method and application thereof |
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| CN116102933A (en) * | 2022-11-17 | 2023-05-12 | 蒙娜丽莎集团股份有限公司 | Super-hydrophobic ceramic plate coating and preparation method thereof |
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| WO2022127116A1 (en) * | 2020-12-19 | 2022-06-23 | 广东西敦千江粉漆科学研究有限公司 | Preparation method for and application of weather-resistant, wear-resistant and hydrophobic aid |
| CN112961552A (en) * | 2021-02-04 | 2021-06-15 | 几何智慧城市科技(广州)有限公司 | Water-based super-hydrophobic coating and preparation method and application thereof |
| CN116102933A (en) * | 2022-11-17 | 2023-05-12 | 蒙娜丽莎集团股份有限公司 | Super-hydrophobic ceramic plate coating and preparation method thereof |
| CN116102933B (en) * | 2022-11-17 | 2023-11-21 | 蒙娜丽莎集团股份有限公司 | Super-hydrophobic ceramic plate coating and preparation method thereof |
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Application publication date: 20200728 |