CN113604124A - Water-based finishing paint and preparation method and application thereof - Google Patents
Water-based finishing paint and preparation method and application thereof Download PDFInfo
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- CN113604124A CN113604124A CN202110943176.0A CN202110943176A CN113604124A CN 113604124 A CN113604124 A CN 113604124A CN 202110943176 A CN202110943176 A CN 202110943176A CN 113604124 A CN113604124 A CN 113604124A
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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
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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
- C09D7/63—Additives non-macromolecular organic
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
- E04F13/02—Coverings or linings, e.g. for walls or ceilings of plastic materials hardening after applying, e.g. plaster
Abstract
The invention provides a water-based finishing paint and a preparation method and application thereof, wherein the water-based finishing paint comprises the following components in parts by weight: 50-60 parts of acrylic emulsion, 2-5 parts of film forming auxiliary agent, 6-10 parts of inorganic silicon hydrophilic agent and 0.01-0.05 part of coloring agent; the inorganic silicon hydrophilic agent is selected from any one of silica sol, potassium silicate or lithium silicate or a combination of at least two of the silica sol, the potassium silicate and the lithium silicate. The water-based finishing paint can effectively improve the hardness and the surface hydrophilicity of a paint film, and realizes excellent stain resistance, good mechanical strength, adhesion and weather resistance. Meanwhile, the water-based finishing paint has a color matching function, and is coated on the outer side of the colorful coating layer, so that the color difference of the colorful coating layer can be compensated under the condition of not adjusting the formula of the colorful coating, the color matching difficulty of the colorful coating is reduced, the coating process of the colorful decorative layer is simplified, and the production efficiency of the colorful decorative layer is obviously improved.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a water-based finishing paint as well as a preparation method and application thereof.
Background
With the continuous progress of society and the remarkable improvement of living standard, people have higher and more comprehensive requirements on the paint decoration of buildings, and the paint not only has the protection function on the buildings, but also has new elements of energy conservation, environmental protection, safety and beauty. Therefore, health, energy conservation and beauty are gradually becoming important development directions of architectural coatings; multicolor paints can satisfy the above requirements, and have attracted much attention in recent years.
2 or more than 2 water-based color particles are suspended in the colorful coating, a colorful coating can be formed by one-time spraying, the veneer of the colorful coating has the effect of natural granite, the colorful coating not only meets the requirements of energy conservation and environmental protection, but also gives people an elegant and spectacular feeling, and is a novel environment-friendly building coating. For example, CN109988474A discloses a sand-in-water multicolor paint with good early water resistance, which is obtained by the following method: (1) dispersing water and hectorite until the water and the hectorite are fully dissolved to obtain protective glue; (2) respectively preparing white base paint and sand-in-water multicolor paint continuous phases; (3) mixing water, a preservative, bentonite and a protective adhesive to obtain a granulation liquid, adding quartz sand and color paste into white base paint, and then adding the granulation liquid to granulate to obtain colorful particles; (4) and (3) uniformly mixing the sand-in-water multicolor paint continuous phase and the multicolor particles to obtain the multicolor paint. The colorful paint has good early water resistance, but the silicate hectorite is used as a protective colloid, so that the gel strength is weaker, the product stability is not good enough, and the popularization and the application are not facilitated. CN103952051A discloses an internal crosslinking multicolor paint and a preparation method thereof, wherein the multicolor paint is formed by adding color particles of a component A into a component B of a continuous phase; the color particles of the component A are obtained by cutting and granulating gel, and the gel comprises the following raw materials in percentage by mass: 30-70% of water, 0.5-3.0% of protective colloid, 0.1-2.5% of thickening agent, 0.1-0.5% of wetting agent, 0.2-1.0% of dispersing agent, 2.0-10% of pigment, 2.0-30% of filler, 0.1-0.5% of defoaming agent, 0.01-0.2% of pH regulator, 20-60% of pure acrylic emulsion and 0.01-0.4% of crosslinking agent, wherein the protective colloid is modified guar gum or modified carboxymethyl cellulose, and the crosslinking agent is organic boron crosslinking agent or organic zirconium crosslinking agent. The multicolor paint has good stability and color particle strength, but the preparation process of the color particles is complex, the control difficulty of gel formation is high, the cost of raw materials is high, and the large-scale application is limited.
In architectural coating, a multicolor coating prepared by the multicolor paint can meet the requirements of decoration and ornamental value, but the mechanical property, weather resistance and chemical resistance of the coating are greatly insufficient, so that the coating of the multicolor coating with finishing varnish as a protective layer is required. CN105623444A discloses a water-based multicolor paint finishing paint, which comprises the following components in parts by mass: 16.1-23.4 parts of water, 0.1-0.2 part of silane coupling agent, 0.1-0.4 part of fluorinated surfactant, 0.1-0.3 part of preservative, 22-25 parts of aqueous fluorocarbon emulsion, 53-55 parts of silicone-acrylic emulsion, 1.0-1.5 parts of film-forming additive, 0.1-0.5 part of multifunctional additive, 0.2-1.0 part of leveling thickener and 1.2-2.2 parts of water-resistant reinforcing agent. The water-based multicolor paint finishing paint is transparent varnish, has good water resistance, and has great promotion space for stain resistance and adhesive force.
With the continuous expansion of market demand of multicolor paint, people find that the multicolor paint generally contains 4-6 color points, and each color point can influence the whole color, so the color matching difficulty is high, the technical requirements on color matching personnel are high, the color matching efficiency is low, the production cycle of the multicolor paint is long, the cost is high, and the coating difficulty of the multicolor paint is also high. However, the performance of the finish paint usually used in combination with the multicolor paint is basically the same as that of the common finish varnish, and the color problem possibly faced by the multicolor coating cannot be solved in a targeted manner.
Therefore, it is a research focus in the field to develop an over-coating paint which can improve the chromatic aberration of a colorful coating and has excellent stain resistance, weather resistance and adhesion.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide the water-based finishing paint and the preparation method and the application thereof, wherein the water-based finishing paint can form a coating with high hardness and good hydrophilicity by the synergistic compounding of acrylic emulsion, a film-forming assistant, an inorganic silicon hydrophilic agent and a coloring agent, so that the excellent stain resistance is realized; meanwhile, the water-based finishing paint is matched with the multicolor paint for use, so that the color phase difference of the multicolor paint layer can be made up, and the color mixing speed and the production efficiency of the colorful veneer are obviously improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a water-based finishing paint, which comprises the following components in parts by weight: 50-60 parts of acrylic emulsion, 2-5 parts of film forming auxiliary agent, 6-10 parts of inorganic silicon hydrophilic agent and 0.01-0.05 part of coloring agent; the inorganic silicon hydrophilic agent is selected from any one of silica sol, potassium silicate or lithium silicate or a combination of at least two of the silica sol, the potassium silicate and the lithium silicate.
The water-based finishing paint provided by the invention takes the acrylic emulsion as a film forming substance, and can effectively improve the hardness and the hydrophilicity of a paint film by matching with a film forming auxiliary agent, a specific inorganic silicon hydrophilic agent and a coloring agent, so that the formed coating has excellent stain resistance and mechanical strength, and has good apparent permeability, adhesion performance and weather resistance; meanwhile, the water-based finishing paint has a color mixing function, is coated on the outer side (the side far away from the substrate) of the colorful coating layer, and can make up the difference of colors of the colorful coating layer without adjusting the formula of the colorful coating, so that the color mixing difficulty of the colorful coating is reduced, the coating process of the colorful finishing coat is greatly simplified, and the production efficiency of the colorful finishing coat is improved.
In the present invention, the acrylic emulsion is 50-60 parts, such as 51 parts, 52 parts, 53 parts, 54 parts, 55 parts, 56 parts, 57 parts, 58 parts or 59 parts, and the specific values therebetween are limited by space and for the sake of brevity, and the invention is not intended to be exhaustive of the specific values included in the ranges.
The film-forming additive is 2-5 parts, for example, 2.2 parts, 2.5 parts, 2.8 parts, 3 parts, 3.2 parts, 3.5 parts, 3.8 parts, 4 parts, 4.1 parts, 4.3 parts, 4.5 parts or 4.8 parts, and specific values therebetween are not exhaustive, and for the sake of brevity, the invention is not intended to be exhaustive of the specific values included in the ranges.
The inorganic silicon-based hydrophilic agent is 6-10 parts, for example, 6.2 parts, 6.5 parts, 6.8 parts, 7 parts, 7.2 parts, 7.5 parts, 7.8 parts, 8 parts, 8.2 parts, 8.5 parts, 8.8 parts, 9 parts, 9.2 parts, 9.5 parts or 9.8 parts, and specific values therebetween are limited to space and simplicity, and the specific values included in the range are not exhaustive.
The colorant is 0.01-0.05 parts, such as 0.012 part, 0.015 part, 0.018 part, 0.02 part, 0.022 part, 0.025 part, 0.028 part, 0.03 part, 0.032 part, 0.035 part, 0.038 part, 0.04 part, 0.042 part, 0.045 part or 0.048 part, and the specific values therebetween are limited to space and for brevity, and the invention is not exhaustive.
Preferably, the acrylic emulsion comprises a pure acrylic emulsion and/or a silicone acrylic emulsion, and is further preferably a silicone acrylic emulsion.
Preferably, the film-forming aid is an alcohol ester film-forming aid.
Preferably, the silica sol has a particle size of 5 to 50nm, for example, 6nm, 8nm, 10nm, 12nm, 15nm, 18nm, 20nm, 22nm, 25nm, 28nm, 30nm, 32nm, 35nm, 38nm, 40nm, 42nm, 45nm or 48nm, and the specific values therebetween are not exhaustive, and for brevity and conciseness, the invention does not provide an exhaustive list of specific values included in the range.
Preferably, the silica sol has a solid content of 25 to 35%, for example, 26%, 27%, 28%, 29%, 29.5%, 30%, 30.5%, 31%, 32%, 33% or 34%, and the specific values therebetween are not exhaustive for the sake of brevity and simplicity.
Preferably, the colorant is an inorganic color paste.
As a preferred technical scheme of the invention, the colorant is inorganic color paste which has good colorability and can endow the water-based finish paint with better toning function, permeability and weather resistance. The inorganic color paste is not particularly limited, and the technical effects of the invention can be realized by the known inorganic color paste in the prior art.
Preferably, the aqueous finishing coat further comprises 0.1-0.3 parts of wetting agent by weight, for example, the wetting agent can be 0.11 part, 0.13 part, 0.15 part, 0.17 part, 0.19 part, 0.2 part, 0.21 part, 0.23 part, 0.25 part, 0.27 part or 0.29 part, and specific points between the above points are limited by space and for the sake of brevity, and the invention is not exhaustive.
Preferably, the wetting agent is a substrate wetting agent.
Preferably, the substrate wetting agent is a silicone-based substrate wetting agent.
Preferably, the aqueous finishing coat further comprises 0.01-0.3 parts by weight of preservative, for example, the preservative can be 0.03 parts, 0.05 parts, 0.08 parts, 0.1 parts, 0.11 parts, 0.13 parts, 0.15 parts, 0.17 parts, 0.19 parts, 0.2 parts, 0.21 parts, 0.23 parts, 0.25 parts, 0.27 parts or 0.29 parts, and the specific values therebetween are limited by space and for brevity, and the invention is not exhaustive and the specific values included in the range are not limited by the disclosure.
Preferably, the preservative comprises an isothiazolinone preservative and/or a cason preservative.
Preferably, the aqueous finishing varnish further comprises 0.01 to 0.2 parts by weight of a defoaming agent, for example, the defoaming agent may be 0.03 part, 0.05 part, 0.08 part, 0.1 part, 0.11 part, 0.12 part, 0.13 part, 0.14 part, 0.15 part, 0.16 part, 0.17 part, 0.18 part or 0.19 part, and specific values therebetween are limited by space and for the sake of brevity, and the invention is not exhaustive list of the specific values included in the range.
Preferably, the defoamer is a silicone defoamer.
Preferably, the aqueous finishing paint further comprises 0.5-3 parts of antifreeze agent by weight, for example, the antifreeze agent can be 0.6 part, 0.8 part, 1 part, 1.1 part, 1.3 part, 1.5 part, 1.7 part, 1.9 part, 2 parts, 2.1 parts, 2.3 parts, 2.5 parts, 2.7 parts or 2.9 parts, and specific values between the above values are limited by space and for the sake of brevity, and the invention is not exhaustive of the specific values included in the range.
Preferably, the antifreeze agent comprises ethylene glycol and/or propylene glycol.
Preferably, the aqueous finishing coat further comprises 0.01-0.3 parts of a leveling assistant in parts by weight, for example, the leveling assistant may be 0.03 part, 0.05 part, 0.08 part, 0.1 part, 0.11 part, 0.13 part, 0.15 part, 0.17 part, 0.19 part, 0.2 part, 0.21 part, 0.23 part, 0.25 part, 0.27 part or 0.29 part, and the specific points between the above are limited in point value range and for brevity, the invention does not exhaust the specific points included in the range.
Preferably, the aqueous finishing coat further comprises 0.1-1 part of a thickener in parts by weight, for example, the thickener may be 0.15 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part or 0.95 part, and specific values therebetween are limited in space and for the sake of brevity, and the invention is not exhaustive and does not include the specific values included in the range.
Preferably, the thickener comprises an alkali swelling thickener and/or a polyurethane-based thickener.
Preferably, the aqueous finishing coat further comprises 0.01-0.2 parts of a pH regulator by weight, for example, the pH regulator may be 0.03 parts, 0.05 parts, 0.08 parts, 0.1 parts, 0.11 parts, 0.12 parts, 0.13 parts, 0.14 parts, 0.15 parts, 0.16 parts, 0.17 parts, 0.18 parts or 0.19 parts, and specific point values between the above point values are limited by space and for simplicity, and the invention is not exhaustive and does not list the specific point values included in the range.
Preferably, the pH adjuster is an organic amine compound.
Preferably, the aqueous finishing coat further comprises 10-40 parts by weight of solvent, for example, the solvent can be 12 parts, 15 parts, 18 parts, 20 parts, 22 parts, 25 parts, 28 parts, 30 parts, 32 parts, 35 parts, 37 parts or 39 parts, and specific points between the above points are limited by space and for conciseness, and the invention is not exhaustive in the specific points included in the range.
Preferably, the solvent is water.
Preferably, the water-based finishing paint comprises the following components in parts by weight: 50-60 parts of silicone-acrylic emulsion, 10-40 parts of water, 2-5 parts of film forming additive, 6-10 parts of inorganic silicon hydrophilic agent, 0.01-0.05 part of colorant, 0.1-0.3 part of base wetting agent, 0.01-0.3 part of preservative, 0.01-0.2 part of defoaming agent, 0.5-3 parts of antifreezing agent, 0.01-0.3 part of leveling additive, 0.1-1 part of thickening agent and 0.01-0.2 part of pH regulator; wherein the inorganic silicon hydrophilic agent is selected from any one of silica sol, potassium silicate or lithium silicate or the combination of at least two of the silica sol, the potassium silicate and the lithium silicate.
In another aspect, the present invention provides a method for preparing the water-based finishing paint according to the first aspect, the method comprising: and uniformly mixing the acrylic emulsion, the film-forming assistant, the inorganic silicon hydrophilic agent and the coloring agent to obtain the water-based finishing paint.
Preferably, the preparation method comprises: mixing water, an inorganic silicon hydrophilic agent, a wetting agent, a defoaming agent, a pH regulator and a preservative to obtain a premixed solution; and uniformly mixing the premixed liquid, the acrylic emulsion, the film-forming aid, the antifreezing agent and the leveling aid, then adding the tackifier and the colorant, and uniformly mixing to obtain the water-based finishing finish.
In the invention, the mixing in the preparation method is carried out under the stirring condition, and the stirring rotating speed can be adjusted according to the actual situation; the mixing is preferably carried out in a dispersion cylinder.
In a third aspect, the present invention provides a use of the water-based finishing paint according to the first aspect in architectural coatings.
Preferably, the water-based finishing paint is applied to the outer side of the colorful coating layer; wherein, the outside is the side of the colorful coating layer far away from the substrate.
In a fourth aspect, the present invention provides a method of adjusting chromatic aberration of a multicolor coating, the method comprising: coating the water-based finishing paint in the first aspect on one side of the colorful coating layer away from the substrate to obtain a finishing coating; and adjusting the chromatic aberration of the colorful coating through the finishing coating.
Compared with the prior art, the invention has the following beneficial effects:
the water-based finishing paint provided by the invention takes acrylic emulsion as a film forming substance, and can effectively improve the hardness and surface hydrophilicity of a paint film by matching with a film forming auxiliary agent, a specific inorganic silicon hydrophilic agent and a coloring agent, wherein the water contact angle is 30-60 degrees, the stain resistance of a coating is less than 10 percent, the water-based finishing paint has excellent stain resistance, good mechanical strength, permeability, adhesiveness and weather resistance, and the water-based finishing paint can be stably stored for more than 1 month at high temperature. Meanwhile, the water-based finishing paint has a color matching function, and can compensate the color difference of the colorful coating layer without adjusting the formula of the colorful coating by coating the water-based finishing paint on the outer side of the colorful coating layer, so that the color matching difficulty of the colorful coating is reduced, the coating process of the colorful decorative layer is greatly simplified, and the production efficiency of the colorful decorative layer is improved.
Drawings
FIG. 1 is a stain resistance test chart for the waterborne overprint varnish provided in example 1;
FIG. 2 is a stain resistance test chart of the aqueous overprint varnish provided in comparative example 5;
FIG. 3 is a comparative plot of color difference adjustment for the aqueous overprint finishes of example 1 and comparative example 5.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
The materials used in the following examples and comparative examples of the invention can be purchased and obtained by market, and the silicone acrylic emulsion is commercially available silicone acrylic emulsion for finishing; the film-forming additive is alcohol ester twelve; the silica sol is commercially available silica sol, and the solid content is 30 percent; the colorant is inorganic color paste of Kelaien; the wetting agent is a silicone base wetting agent, Dow EF 106; the preservative is Dow CBJ-4; the defoaming agent is an organic silicon defoaming agent, ByK 1786 and the leveling auxiliary agent is Dow RM 2020; the thickener is alkali swelling thickener, Dow TT935, and the pH regulator is Angus AMP-95.
Example 1
The water-based finishing paint comprises the following components in parts by weight: 55 parts of silicone-acrylic emulsion, 4 parts of a film-forming additive, 9 parts of silica sol, 0.01 part of inorganic color paste, 0.2 part of a wetting agent, 0.2 part of a preservative, 0.1 part of a defoaming agent, 1.5 parts of propylene glycol (an antifreezing agent), 0.2 part of a leveling additive, 0.5 part of a thickening agent, 0.1 part of a pH regulator and 100 parts of supplementary water.
The preparation method of the water-based finishing paint comprises the following steps:
adding water into a dispersion tank according to the formula amount, adding silica sol, a wetting agent, a defoaming agent, a pH regulator and a preservative at the rotating speed of 300rpm, and uniformly stirring to obtain a premixed solution; and then adding the silicone-acrylic emulsion, the film forming aid, the propylene glycol and the leveling aid into the premixed liquid, stirring for 15min until no shrinkage phenomenon exists, adding the tackifier and the colorant, and uniformly mixing to obtain the water-based finishing paint.
Example 2
The water-based finishing paint comprises the following components in parts by weight: 60 parts of silicone-acrylic emulsion, 5 parts of a film-forming assistant, 10 parts of silica sol, 0.05 part of inorganic color paste, 0.3 part of a wetting agent, 0.1 part of a preservative, 0.2 part of a defoaming agent, 3 parts of propylene glycol, 0.1 part of a leveling assistant, 0.1 part of a thickening agent, 0.2 part of a pH regulator and 100 parts of supplementary water.
The preparation method of the water-based finishing paint comprises the following steps:
adding water into a dispersion tank according to the formula amount, adding silica sol, a wetting agent, a defoaming agent, a pH regulator and a preservative at the rotating speed of 200rpm, and uniformly stirring to obtain a premixed solution; and then adding the silicone-acrylic emulsion, the film forming aid, the propylene glycol and the leveling aid into the premixed liquid, stirring and dispersing for 20min until no shrinkage phenomenon exists, adding the tackifier and the colorant, and uniformly mixing to obtain the water-based finish paint.
Example 3
The water-based finishing paint comprises the following components in parts by weight: 50 parts of silicone-acrylic emulsion, 4 parts of a film-forming assistant, 6 parts of silica sol, 0.03 part of inorganic color paste, 0.1 part of a wetting agent, 0.2 part of a preservative, 0.05 part of a defoaming agent, 0.5 part of propylene glycol, 0.3 part of a leveling assistant, 1 part of a thickening agent, 0.05 part of a pH regulator and 100 parts of supplementary water.
The preparation method of the water-based finishing paint is the same as that of the example 1.
Example 4
The water-based finishing paint comprises the following components in parts by weight: 55 parts of silicone-acrylic emulsion, 4 parts of a film-forming additive, 9 parts of lithium silicate, 0.01 part of inorganic color paste, 0.2 part of a wetting agent, 0.2 part of a preservative, 0.1 part of a defoaming agent, 1.5 parts of propylene glycol, 0.2 part of a leveling additive, 0.5 part of a thickening agent, 0.1 part of a pH regulator and 100 parts of supplementary water.
The preparation method of the water-based finishing paint is the same as that of the example 1.
Example 5
The water-based finishing paint comprises the following components in parts by weight: 55 parts of silicone-acrylate emulsion, 4 parts of a film-forming additive, 9 parts of silica sol, 0.01 part of water-based color paste (Kelaien 131CN), 0.2 part of a wetting agent, 0.2 part of a preservative, 0.1 part of a defoaming agent, 1.5 parts of propylene glycol, 0.2 part of a leveling additive, 0.5 part of a thickening agent, 0.1 part of a pH regulator and 100 parts of supplementary water.
The preparation method of the water-based finishing paint is the same as that of the example 1.
Example 6
The water-based finishing paint comprises the following components in parts by weight: 55 parts of silicone-acrylate emulsion, 4 parts of a film-forming additive, 6 parts of silica sol, 0.01 part of inorganic color paste, 0.2 part of a wetting agent, 0.2 part of a preservative, 0.1 part of a defoaming agent, 1.5 parts of propylene glycol, 0.2 part of a leveling additive, 0.5 part of a thickening agent, 0.1 part of a pH regulator and 100 parts of supplementary water.
The preparation method of the water-based finishing paint is the same as that of the example 1.
Example 7
The water-based finishing paint comprises the following components in parts by weight: 55 parts of silicone-acrylate emulsion, 4 parts of a film-forming additive, 9 parts of silica sol, 0.05 part of inorganic color paste, 0.2 part of a wetting agent, 0.2 part of a preservative, 0.1 part of a defoaming agent, 1.5 parts of propylene glycol, 0.2 part of a leveling additive, 0.5 part of a thickening agent, 0.1 part of a pH regulator and 100 parts of supplementary water.
The preparation method of the water-based finishing paint is the same as that of the example 1.
Comparative example 1
The water-based finishing paint comprises the following components in parts by weight: 55 parts of silicone-acrylic emulsion, 4 parts of a film-forming additive, 4 parts of silica sol, 0.01 part of inorganic color paste, 0.2 part of a wetting agent, 0.2 part of a preservative, 0.1 part of a defoaming agent, 1.5 parts of propylene glycol, 0.2 part of a leveling additive, 0.5 part of a thickening agent, 0.1 part of a pH regulator and 100 parts of supplementary water.
The preparation method of the water-based finishing paint is the same as that of the example 1.
Comparative example 2
The water-based finishing paint comprises the following components in parts by weight: 55 parts of silicone-acrylic emulsion, 4 parts of a film-forming additive, 12 parts of silica sol, 0.01 part of inorganic color paste, 0.2 part of a wetting agent, 0.2 part of a preservative, 0.1 part of a defoaming agent, 1.5 parts of propylene glycol, 0.2 part of a leveling additive, 0.5 part of a thickening agent, 0.1 part of a pH regulator and 100 parts of supplementary water.
The preparation method of the water-based finishing paint is the same as that of the example 1.
Comparative example 3
The water-based finishing paint comprises the following components in parts by weight: 55 parts of silicone-acrylate emulsion, 4 parts of a film-forming additive, 9 parts of silica sol, 0.1 part of inorganic color paste, 0.2 part of a wetting agent, 0.2 part of a preservative, 0.1 part of a defoaming agent, 1.5 parts of propylene glycol, 0.2 part of a leveling additive, 0.5 part of a thickening agent, 0.1 part of a pH regulator and 100 parts of supplementary water.
The preparation method of the water-based finishing paint is the same as that of the example 1.
Comparative example 4
An aqueous overprint varnish which differed from example 1 only in that the silica sol was replaced by an equal amount of sodium silicate; other components, amounts and preparation methods were the same as in example 1.
Comparative example 5
The water-based finishing paint comprises the following components in parts by weight: 50 parts of silicone-acrylic emulsion, 3 parts of film-forming additive, 0.1 part of wetting agent, 0.2 part of preservative, 0.1 part of defoaming agent, 1.5 parts of propylene glycol, 0.2 part of leveling additive, 0.5 part of thickening agent, 0.1 part of pH regulator and 100 parts of supplementary water.
The preparation method of the water-based finishing paint is the same as that of the example 1.
And (3) performance testing:
(1) hydrophilicity: and spraying the water-based finishing paint to be tested on the surface of the substrate, and testing the water contact angle of the water-based finishing paint according to the method in the national standard GB/T31815-2015.
(2) Stain resistance: spraying the water-based finishing paint to be tested on the surface of the base material, preparing an ash standard sample according to a method for testing the stain resistance of an outer wall coating layer in the national standard GB/T9780-2013, and testing the stain resistance; illustratively, the stain resistance test chart of the water-based finishing paint of example 1 is shown in fig. 1, the stain resistance test chart of the water-based finishing paint of comparative example 5 is shown in fig. 2, and comparing fig. 1 and fig. 2, it can be seen that the common water-based finishing paint of comparative example 5 has very obvious gray pollutants and poor stain resistance, and the surface of the water-based finishing paint of example 1 has no obvious gray pollution traces and the stain resistance is as low as 5%.
(3) Storage stability: storing the water-based finishing paint at 50 ℃ for 30 days, and observing whether the water-based finishing paint is uniform and stable or not, and whether the phenomena of layering, color paste floating and the like exist or not;
(4) performance of adjusting chromatic aberration: coating a layer of water-based finishing paint to be detected on the base material coated with the multicolor paint, and observing the color difference regulation condition visually after drying;
wherein, fig. 3 is a color difference adjustment comparison graph of the water-based finishing paint of the embodiment 1 and the comparative example 5, and it can be known from fig. 3 that the water-based finishing paint provided by the invention has a color matching function and can make up for the difference in color difference of the multicolor paint layer without adjusting the formula of the multicolor paint.
The specific test results are shown in table 1:
TABLE 1
According to the test data in table 1, compared with the common water-based finishing paint (comparative example 5) on the market, the water-based finishing paints provided in the embodiments 1 to 7 of the present invention have good storage stability, and can be stably stored for more than 1 month at 50 ℃; the coating formed by the water-based finishing paint has good hydrophilicity, a water contact angle of 30-60 degrees and contamination resistance of 3-9.8 percent, is transparent in appearance, has a color-mixing function, and can effectively adjust the color difference of a colorful coating layer.
The water-based finishing paint takes acrylic emulsion as a film forming substance, and is endowed with good hydrophilicity, stain resistance and storage stability by matching with inorganic silicon hydrophilic agents and coloring agents with specific content and types; if the amount of the inorganic silicon-based hydrophilizing agent is too low (comparative example 1), the hydrophilicity of the coating is low and the stain resistance is not good; too high an amount of the inorganic silicon-based hydrophilic agent (comparative example 2) affects the storage stability of the coating; the phenomenon of color paste floating is easy to occur when the consumption of the coloring agent is too much (comparative example 3), so that the storage stability of the water-based finishing paint is not good. In addition, if a specific kind of inorganic silicon-based hydrophilic agent is not used (comparative example 4), the overall compatibility and stability of the coating are poor, and the use requirements cannot be met.
The applicant states that the present invention is illustrated by the above examples to the aqueous finishing paint of the present invention and the preparation method and application thereof, but the present invention is not limited to the above process steps, i.e. it does not mean that the present invention must rely on the above process steps to be carried out. It will be apparent to those skilled in the art that any modification of the present invention, equivalent substitutions of selected materials and additions of auxiliary components, selection of specific modes and the like, which are within the scope and disclosure of the present invention, are contemplated by the present invention.
Claims (10)
1. The water-based finishing paint is characterized by comprising the following components in parts by weight: 50-60 parts of acrylic emulsion, 2-5 parts of film forming auxiliary agent, 6-10 parts of inorganic silicon hydrophilic agent and 0.01-0.05 part of coloring agent; the inorganic silicon hydrophilic agent is selected from any one of silica sol, potassium silicate or lithium silicate or a combination of at least two of the silica sol, the potassium silicate and the lithium silicate.
2. The water-based finishing paint according to claim 1, wherein the acrylic emulsion comprises a pure acrylic emulsion and/or a silicone acrylic emulsion, preferably a silicone acrylic emulsion;
preferably, the film-forming aid is an alcohol ester film-forming aid.
3. The water-based finishing paint according to claim 1 or 2, wherein the particle size of the silica sol is 5-50 nm;
preferably, the solid content of the silica sol is 25-35%.
4. The water-based finishing paint according to any one of claims 1 to 3, characterized in that the colorant is an inorganic color paste;
preferably, the water-based finishing paint further comprises 0.1-0.3 part of a wetting agent in parts by weight;
preferably, the wetting agent is a substrate wetting agent;
preferably, the substrate wetting agent is a silicone-based substrate wetting agent.
5. The water-based finishing paint according to any one of claims 1 to 4, characterized by further comprising 0.01 to 0.3 parts by weight of a preservative;
preferably, the preservative comprises an isothiazolinone preservative and/or a cason preservative;
preferably, the water-based finishing paint further comprises 0.01-0.2 part of a defoaming agent in parts by weight;
preferably, the defoamer is a silicone defoamer;
preferably, the water-based finishing paint further comprises 0.5-3 parts of an antifreezing agent in parts by weight;
preferably, the antifreeze agent comprises ethylene glycol and/or propylene glycol.
6. The water-based finishing paint according to any one of claims 1 to 5, characterized by further comprising 0.01 to 0.3 part by weight of a leveling assistant;
preferably, the water-based finishing paint further comprises 0.1-1 part of a thickening agent in parts by weight;
preferably, the thickener comprises an alkali swelling thickener and/or a polyurethane-based thickener;
preferably, the water-based finishing paint further comprises 0.01-0.2 part of pH regulator in parts by weight;
preferably, the pH adjuster is an organic amine compound.
7. The water-based finishing paint according to any one of claims 1 to 6, characterized by further comprising 10 to 40 parts by weight of a solvent;
preferably, the solvent is water;
preferably, the water-based finishing paint comprises the following components in parts by weight: 50-60 parts of silicone-acrylic emulsion, 10-40 parts of water, 2-5 parts of film forming additive, 6-10 parts of inorganic silicon hydrophilic agent, 0.01-0.05 part of colorant, 0.1-0.3 part of base wetting agent, 0.01-0.3 part of preservative, 0.01-0.2 part of defoaming agent, 0.5-3 parts of antifreezing agent, 0.01-0.3 part of leveling additive, 0.1-1 part of thickening agent and 0.01-0.2 part of pH regulator; wherein the inorganic silicon hydrophilic agent is selected from any one of silica sol, potassium silicate or lithium silicate or the combination of at least two of the silica sol, the potassium silicate and the lithium silicate.
8. A preparation method of the water-based finishing paint as claimed in any one of claims 1 to 7, characterized by comprising the following steps: uniformly mixing acrylic emulsion, a film-forming assistant, an inorganic silicon hydrophilic agent and a coloring agent to obtain the water-based finishing paint;
preferably, the preparation method specifically comprises: mixing water, an inorganic silicon hydrophilic agent, a wetting agent, a defoaming agent, a pH regulator and a preservative to obtain a premixed solution; and uniformly mixing the premixed liquid, the acrylic emulsion, the film-forming aid, the antifreezing agent and the leveling aid, then adding the tackifier and the colorant, and uniformly mixing to obtain the water-based finishing finish.
9. Use of an aqueous finishing coat according to any one of claims 1 to 7 in architectural coatings;
preferably, the water-based finishing paint is applied to the outer side of the multicolor paint layer.
10. A method of adjusting chromatic aberration of a multicolor coating, the method comprising: coating the side, far away from the substrate, of the colorful coating layer with the water-based finishing paint as defined in any one of claims 1 to 7 to obtain a finishing coating; and adjusting the chromatic aberration of the colorful coating through the finishing coating.
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| CN116814122A (en) * | 2022-04-19 | 2023-09-29 | 三河方元绿洲节能科技有限公司 | Water-based thick crosslinking weight anti-corrosion primer coating and heavy anti-corrosion coating |
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Application publication date: 20211105 |