CN113480904A - Water-based matte finish varnish, and preparation method and application thereof - Google Patents
Water-based matte finish varnish, and preparation method and application thereof Download PDFInfo
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- CN113480904A CN113480904A CN202110859775.4A CN202110859775A CN113480904A CN 113480904 A CN113480904 A CN 113480904A CN 202110859775 A CN202110859775 A CN 202110859775A CN 113480904 A CN113480904 A CN 113480904A
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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
- C09D7/65—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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention relates to a water-based matte finishing varnish and a preparation method and application thereof, wherein the water-based matte finishing varnish comprises the following components in parts by weight, based on 100 parts of the total weight of the components of the water-based matte finishing varnish: 65-70 parts of silicone-acrylate resin, 0.3-0.5 part of polysiloxane, 2-5 parts of wax dispersoid, 0.1-26 parts of auxiliary agent and 100 parts of water. The water-based matte finishing varnish disclosed by the invention has excellent low-temperature (5 ℃) film-forming performance on the premise of less addition of a film-forming additive and no need of adding matting powder, and the paint has excellent matte property, scrawling resistance, stain resistance and scratch resistance after film formation, is light in smell, ensures a low-temperature film-forming effect, and is convenient to construct.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a water-based matte finish varnish, and a preparation method and application thereof.
Background
The process requirements of the building coating are one surface and two surfaces, and the traditional latex coating finish has poor stain resistance, scrawling resistance and scratching resistance. Even if the stain resistance score passes the standard score, the paint film surface still has residual stain marks and is poor in stain resistance. Compared with traditional building coatings, the stain resistance of the existing interior wall latex coating is improved to a certain extent, but some stains can be wiped clean immediately in a short time, but after more than two hours, the stains are almost difficult to wipe clean, very obvious marks can be left, and the stain resistance degree is limited. In addition, the coating formed by the building coating has general compactness and lower hardness, and the coating is easy to grow mildew, damage, bubble and even fall off after being wetted and wiped for a long time.
CN106883700A relates to the technical field of water-based paint, in particular to the technical field of matte paint, and specifically discloses a matte finish varnish, which comprises the following components in parts by mass: 50-60 parts of water-based acrylic matte emulsion, 30-46 parts of deionized water, 0.05-0.1 part of base material wetting agent, 0.1-0.2 part of defoaming agent, 1-2 parts of propylene glycol, 1-2 parts of film-forming assistant and 0.2-0.4 part of thickening agent. The matte finishing varnish disclosed by the method has the advantages of good gloss and good dispersibility, is not easy to form layering and precipitation, is stable to store, avoids the problems that the matte powder is easy to mildew and whiten, and is poor in stain resistance.
CN106032449A discloses a matte finish varnish and a preparation process thereof, belonging to the field of stone-like coatings. The matte finishing varnish disclosed by the method comprises the following raw materials in percentage by weight: 25-40% of deionized water, 0-0.2% of dispersant, 0.05-0.1% of wetting agent, 2.5-6% of extinction substance, 0.1-0.2% of defoaming agent, 50-65% of emulsion, 2-5% of film-forming additive, 0.1-0.3% of bactericide, 1-6% of antifouling agent and 0.2-0.5% of thickening agent. The preparation process disclosed by the invention comprises the following steps: sequentially adding raw materials into a mixing barrel according to a formula to obtain a mixture; and vacuumizing the mixture to remove bubbles, and adding a thickening agent to obtain the matte finish varnish. The disclosed matte finish varnish can not only easily take away pollutants, but also avoid the occurrence of rain mark problem, and achieves the hydrophilic self-cleaning effect. The anti-fouling agent disclosed by the method is siloxane and derivatives thereof, the matting substance takes hollow silica as a carrier, the surface of the hollow silica is coated with polyolefin substances, the addition of the siloxane and the derivatives thereof improves the fouling resistance to a certain extent, but the addition of the matting substance taking the silica as the carrier has a certain negative effect on the fouling resistance, and the two substances are added into the same formula system at the same time, so that the fouling resistance of a finished paint film is general.
CN105778692B discloses a matte finishing varnish and a preparation method thereof, wherein the disclosed matte finishing varnish comprises the following raw materials in percentage by weight: 25-65% of core-shell structure acrylic copolymer emulsion, 0.05-6% of thickening agent, 0.1-5% of rheological additive, 0.1-0.6% of dispersing agent, 0.1-0.6% of wetting agent, 1.5-2% of film-forming additive, 0.5-5% of wax emulsion, 0.1-0.5% of defoaming agent, 1.5-7.0% of functional additive and 20-65% of water. The matte finishing varnish disclosed by the invention still has a good matte effect without adding a flatting agent, and meanwhile, the storage stability of the system is good, the transparency and water-white resistance of a paint film are good, and the comprehensive performance is excellent. Although the wax emulsion is added into the matte finishing varnish to enhance the hydrophobicity of a system and improve the stain resistance, the substances playing a decisive role in the formula are emulsion with higher content, and the stain resistance of the acrylic copolymer emulsion with the core-shell structure cannot reach an excellent level, so that the disclosed product only stays in the matte finishing varnish and does not have better stain resistance.
CN 109207041 a discloses a water-based two-component anti-graffiti coating. Although the two-component water-based paint has better resistance and better stain resistance compared with the single-component water-based paint, the two-component paint has the defects of high construction difficulty, short open period, certain toxicity and the like, so that the large-scale application of the two-component paint is limited, and in numerous stain resistance paint patents, the two-component paint can only realize the bright effect, namely the 60-degree angle gloss is more than 70 degrees, and the problem of matte stain resistance in practical household application is not solved.
Therefore, the development of a water-based paint with good compactness, high hardness, washing resistance, environmental protection, water resistance and excellent stain resistance is very important.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide the water-based matte finishing varnish and the preparation method and application thereof, and a paint film formed by the water-based matte finishing varnish has good performances in the aspects of gloss, doodling prevention, stain resistance, scratch resistance, low-temperature film formation and smell.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a water-based matte finishing varnish, which comprises the following components in parts by weight, based on 100 parts of the total weight of the components of the water-based matte finishing varnish: 65-70 parts of silicone-acrylate resin, 0.3-0.5 part of polysiloxane, 2-5 parts of wax dispersoid, 0.1-26 parts of auxiliary agent and 100 parts of water.
According to the water-based matte finishing varnish, the silicone-acrylic resin and the polysiloxane are synergistic in a specific ratio, so that the comprehensive performance, particularly the stain resistance, of a paint film formed by a paint is improved, specifically, the silicone-acrylic resin has excellent self-extinction property, water-whitening resistance and stain resistance, and in the leveling process of the paint, the polysiloxane is matched with the particle distribution and sequencing of the silicone-acrylic resin, so that the silicone-acrylic resin has extremely small surface tension, the compatibility of the silicone-acrylic resin and the silicone-acrylic resin is improved, the shrinkage cavity of a coating is not easily caused, and the smoothness, the scratch resistance and the stain resistance of the formed paint film are ensured. In the aspect of gloss control, the self-extinction silicone-acrylic resin is selected and added with the wax dispersion, so that the gloss at an angle of 60 degrees is further reduced, the hydrophobicity of a paint film is increased, and the stain resistance is further improved. When the silicone-acrylic resin is matched with 0.3-0.5 part of polysiloxane within the range of 65-70 parts by weight in the paint vehicle, the formed paint film has the best comprehensive performance, so that the water-based matte finishing varnish can achieve the standard of the conventional interior wall paint after being coated, and also has excellent matte property, pollution resistance, scratch resistance and waterproof property.
The weight portion of the silicone-acrylic resin is 65-70 portions, such as 65.5 portions, 66 portions, 66.5 portions, 67 portions, 67.5 portions, 68 portions, 68.5 portions, 69 portions, 69.5 portions, etc.
The polysiloxane is 0.3-0.5 parts by weight, such as 0.32 parts, 0.34 parts, 0.36 parts, 0.38 parts, 0.4 parts, 0.42 parts, 0.44 parts, 0.46 parts, 0.48 parts and the like.
The wax dispersion is present in an amount of 2 to 5 parts by weight, such as 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, etc.
The assistant is 0.1-26 parts by weight, such as 0.3 part, 0.8 part, 1 part, 2 parts, 4 parts, 6 parts, 8 parts, 10 parts, 12 parts, 14 parts, 16 parts, 18 parts, 20 parts, 22 parts, 24 parts and the like.
Preferably, the particle size of the silicone-acrylic resin is less than or equal to 0.1 μm, such as 0.09 μm, 0.08 μm, 0.07 μm, 0.06 μm, 0.05 μm, 0.04 μm, 0.03 μm, 0.02 μm, and the like.
The particle size of the silicone acrylic resin is in a small range, so that the self-extinction silicone acrylic resin has high appearance transparency, and the emulsion forms a film to form a nano-grade uneven surface by microscopic analysis, so that the scattering capacity of light is enhanced, and the reflection is weakened, thereby enabling the paint film to achieve the self-matt effect; macroscopically, since the roughness of the surface formation is limited to the nanometer level, the surface of the coating film still exhibits a smooth and flat state in terms of touch feeling.
Meanwhile, the ultrafine particle size is beneficial to the permeation of the emulsion to a lower paint film, so that the adhesive force and the sealing property of the emulsion are well improved, and the stain resistance effect is excellent.
Preferably, the polysiloxane comprises polydimethylsiloxane and/or a polyether-polydimethylsiloxane copolymer.
Preferably, the adjuvant comprises any one of, or a combination of at least two of, a defoamer, a film-forming adjuvant, an antifreeze, or a thickener, wherein typical but non-limiting combinations include: combinations of defoamers and coalescents, combinations of coalescents, antifreeze and thickeners, combinations of defoamers, coalescents, antifreeze and thickeners, and the like, with combinations of defoamers, coalescents, antifreeze and thickeners being preferred.
Preferably, the anti-foaming agent comprises a mineral oil type anti-foaming agent and/or a silicone type anti-foaming agent.
Preferably, the coalescent includes any one or a combination of at least two of ethylene glycol butyl ether, propylene glycol methyl ether, propylene glycol ethyl ether, propylene glycol butyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monopropyl ether, dipropylene glycol monobutyl ether, tripropylene glycol n-butyl ether, propylene glycol phenyl ether, lauryl alcohol ester, hexylene glycol butyl ether acetate, or ethyl 3-ethoxypropionate, wherein typical but non-limiting combinations include: a combination of ethylene glycol butyl ether and propylene glycol methyl ether, a combination of propylene glycol ethyl ether, propylene glycol butyl ether and dipropylene glycol monomethyl ether, a combination of propylene glycol monobutyl ether, tripropylene glycol n-butyl ether, propylene glycol phenyl ether, lauryl alcohol ester and hexylene glycol butyl ether acetate, a combination of dipropylene glycol monomethyl ether, dipropylene glycol monopropyl ether, dipropylene glycol monobutyl ether, tripropylene glycol n-butyl ether, propylene glycol phenyl ether, lauryl alcohol ester, hexylene glycol butyl ether acetate and ethyl 3-ethoxypropionate, and the like.
Preferably, the antifreeze agent comprises any one of ethylene glycol, propylene glycol or ethylene glycol monobutyl ether, or a combination of at least two thereof, with typical but non-limiting combinations including: combinations of ethylene glycol and propylene glycol, combinations of propylene glycol and ethylene glycol monobutyl ether, combinations of ethylene glycol, propylene glycol and ethylene glycol monobutyl ether, and the like.
Preferably, the thickener comprises a nonionic associative thickener.
Preferably, the nonionic associative thickener comprises an ethoxylated polyurethane water-soluble polymer.
Preferably, the defoamer is present in an amount of 0.1 to 1 part by weight, such as 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part, and the like.
Preferably, the film-forming aid is present in an amount of 3 to 6 parts by weight, such as 3.2 parts, 3.5 parts, 3.8 parts, 4 parts, 4.2 parts, 4.5 parts, 4.8 parts, 5 parts, 5.2 parts, 5.5 parts, 5.8 parts, and the like.
Preferably, the antifreeze is present in an amount of 0.1 to 1 part by weight, for example, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part, etc.
Preferably, the thickener is present in an amount of 0.1 to 0.5 parts by weight, such as 0.15 parts, 0.2 parts, 0.25 parts, 0.3 parts, 0.35 parts, 0.4 parts, 0.45 parts, and the like.
As a preferred technical scheme, the water-based matte finishing varnish comprises the following components in parts by weight:
in a second aspect, the present invention provides a process for the preparation of the water-based matte finishing varnish of the first aspect, the process comprising the steps of:
and mixing the silicone-acrylic resin, polysiloxane, the wax dispersoid, the auxiliary agent and water according to parts by weight to obtain the water-based matte finish varnish.
Preferably, the preparation method comprises the following steps:
(1) mixing silicone-acrylic resin and a defoaming agent to obtain a first mixed solution;
(2) mixing the film forming additive, the antifreezing agent and water to obtain a second mixed solution;
(3) and mixing the first mixed solution and the second mixed solution, and then sequentially mixing the mixture with polysiloxane, a thickening agent and a wax dispersion to obtain the water-based matte finish varnish.
Preferably, the rotation speed of the mixing in steps (1), (2) and (3) is 300-1000rpm, such as 400rpm, 500rpm, 600rpm, 700rpm, 800rpm, 900rpm, 1000rpm and the like, independently.
Preferably, the mixing time is each independently 3-8min, such as 4min, 5min, 6min, 7min, and the like.
In a third aspect, the present invention provides a use of the aqueous matte finishing varnish of the first aspect in construction.
Compared with the prior art, the invention has the following beneficial effects:
the water-based matte finish varnish has excellent film-forming performance at low temperature (5 ℃) on the premise of less addition of a film-forming additive and no need of adding matting powder, and the paint film has excellent matte property, scrawling resistance, stain resistance and scratch resistance, has light smell, ensures the low-temperature film-forming effect and is convenient to construct. The 60-degree gloss of a paint film formed by the water-based matte finishing varnish is below 8 degrees, the scrawling resistance is above 7 minutes, the scratch resistance is above 7 parts, the film is formed at low temperature without abnormity, the paint film does not shrink holes, and the smell is above 8 minutes.
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 specifications of the raw materials and the manufacturer's information for the aqueous matte top-coat varnish in each embodiment are shown in table 1.
TABLE 1
Example 1
The embodiment provides a water-based matte finishing varnish, which comprises the following components in parts by weight, based on 100 parts of the total weight of the components of the water-based matte finishing varnish: 65 parts of silicone-acrylate resin, 0.3 part of polysiloxane (polydimethylsiloxane), 2 parts of wax dispersion, 0.1 part of defoaming agent (BYK-093), 3 parts of film-forming additive (propylene glycol ether), 0.1 part of antifreezing agent (ethylene glycol), 0.1 part of thickening agent (ethoxy polyurethane water-soluble polymer) and 100 parts of water.
The preparation method of the water-based matte finishing varnish comprises the following steps:
(1) mixing the silicone-acrylic resin and the defoaming agent at 500rpm for 5min to obtain a first mixed solution;
(2) mixing the film forming additive, the antifreezing agent and water for 3min to obtain a second mixed solution;
(3) and mixing the first mixed solution and the second mixed solution, then sequentially mixing the first mixed solution and the second mixed solution with polysiloxane, a thickening agent and a wax dispersion, and stirring for 5min to obtain the water-based matte finishing varnish.
Example 2
The embodiment provides a water-based matte finishing varnish, which comprises the following components in parts by weight, based on 100 parts of the total weight of the components of the water-based matte finishing varnish: 65 parts of silicone-acrylate resin, 0.3 part of polysiloxane (polyether-polydimethylsiloxane copolymer), 5 parts of wax dispersion, 0.5 part of defoaming agent (BYK-A550), 6 parts of film-forming aid (tripropylene glycol n-butyl ether), 1 part of antifreezing agent (propylene glycol), 0.5 part of thickening agent (ethoxy polyurethane water-soluble polymer) and 100 parts of water.
The preparation method of the water-based matte finishing varnish comprises the following steps:
(1) mixing the silicone-acrylic resin and the defoaming agent at 500rpm for 5min to obtain a first mixed solution;
(2) mixing the film forming additive, the antifreezing agent and water for 3min to obtain a second mixed solution;
(3) and mixing the first mixed solution and the second mixed solution, then sequentially mixing the first mixed solution and the second mixed solution with polysiloxane, a thickening agent and a wax dispersion, and stirring for 5min to obtain the water-based matte finishing varnish.
Example 3
The embodiment provides a water-based matte finishing varnish, which comprises the following components in parts by weight, based on 100 parts of the total weight of the components of the water-based matte finishing varnish: 70 parts of silicone-acrylate resin, 0.5 part of polysiloxane (polydimethylsiloxane and polyether-polydimethylsiloxane copolymer with the mass ratio of 1: 1), 2 parts of wax dispersoid, 0.5 part of defoaming agent (TEGO-810), 4 parts of film-forming additive (hexanediol butyl ether acetate), 0.5 part of antifreezing agent (ethylene glycol monobutyl ether), 0.3 part of thickening agent (ethoxy polyurethane water-soluble polymer) and 100 parts of water.
The preparation method of the water-based matte finishing varnish comprises the following steps:
(1) mixing the silicone-acrylic resin and the defoaming agent at 500rpm for 5min to obtain a first mixed solution;
(2) mixing the film forming additive, the antifreezing agent and water for 3min to obtain a second mixed solution;
(3) and mixing the first mixed solution and the second mixed solution, then sequentially mixing the first mixed solution and the second mixed solution with polysiloxane, a thickening agent and a wax dispersion, and stirring for 5min to obtain the water-based matte finishing varnish.
Example 4
The embodiment provides a water-based matte finishing varnish, which comprises the following components in parts by weight, based on 100 parts of the total weight of the components of the water-based matte finishing varnish: 68 parts of silicone-acrylate resin, 0.5 part of polysiloxane (polyether-polydimethylsiloxane copolymer), 3 parts of wax dispersion, 0.5 part of defoaming agent (TEGO-810 and BYK-A550 in a mass ratio of 1: 1), 4 parts of film-forming additive (tripropylene glycol n-butyl ether), 0.5 part of antifreezing agent (ethylene glycol monobutyl ether), 0.1 part of thickening agent (ethoxy polyurethane water-soluble polymer) and 100 parts of water.
The preparation method of the water-based matte finishing varnish comprises the following steps:
(1) mixing the silicone-acrylic resin and the defoaming agent at 1000rpm for 5min to obtain a first mixed solution;
(2) mixing the film forming additive, the antifreezing agent and water for 3min to obtain a second mixed solution;
(3) and mixing the first mixed solution and the second mixed solution, then sequentially mixing the first mixed solution and the second mixed solution with polysiloxane, a thickening agent and a wax dispersion, and stirring for 8min to obtain the water-based matte finishing varnish.
Example 5
This example is different from example 3 in that the silicone-acrylic resin is 65 parts by weight, the water is adjusted to 100 parts by weight of all the components, and the rest is the same as example 3.
Example 6
This example is different from example 3 in that the weight part of polysiloxane is 0.3 parts, the weight part of water is adjusted to make all the components total 100 parts, and the rest is the same as example 3.
Comparative example 1
This comparative example is different from example 3 in that the silicone-acrylic resin was replaced with an equal mass of styrene-acrylic emulsion, and the rest was the same as example 3.
Comparative example 2
The comparative example is different from the example 3 in that the silicone-acrylic resin is replaced by the acrylic copolymer emulsion with the same mass of the core-shell structure, and the rest is the same as the example 3.
Comparative example 3
This comparative example differs from example 3 in that the polydimethylsiloxane was replaced by a polyethylene wax of equal mass, the remainder being identical to example 3.
Comparative example 4
This comparative example differs from example 3 in that the polyether-polydimethylsiloxane copolymer was replaced with an equal mass of an acrylate copolymer, and the rest was the same as example 3.
Comparative example 5
The comparative example is different from example 3 in that the parts by weight of the silicone-acrylic resin are 75 parts, the parts by weight of water are adjusted to 100 parts of all the components, and the rest is the same as example 3.
Comparative example 6
This comparative example is different from example 3 in that the weight part of polysiloxane is 0.8 parts, the weight part of water is adjusted so that all the components are 100 parts in total, and the rest is the same as example 3.
Performance testing
Examples 1-6 and comparative examples 1-6 were tested as follows:
(1) gloss: the test was carried out at 60 ℃ using GB/T9754-2007, the test standard being that the test specimens are stirred sufficiently before application to destroy any possible thixotropic structure, but without the possibility of carrying air bubbles in the paint, that the degreased glass plate is placed with about 2ml of paint on one end, laid in a line across, and drawn down with a paint film applicator (150. + -.2. mu.m) at a fixed pressure and at a speed of 100mm/s to form a flat paint film. Drying (or oven drying) at 23 + -2 deg.C and 50 + -5% relative humidity for a specified time, and adjusting at the same temperature and relative humidity for at least 16h before testing without exposure to sunlight.
(2) Anti-graffiti property: all colors (24 colors) of the water color pen can be completely wiped by dry cloth for 10 minutes, wet cloth cannot be wiped for 1 minute, wet cloth cannot be completely wiped for 5 minutes (8-14 colors), and the more colors the other colors are wiped completely, the higher the score is.
(3) Stain resistance: the stain resistance scoring is carried out by a stain resistance test method GB/T9780-2013 of the coating of the architectural coating, wherein 5 pollutants are black tea, edible vinegar, blue-black ink, water-soluble melanin and alcohol-soluble melanin, and the test standards are as follows: the score is 10 points for a dry cloth wipe, 1 point for a wet cloth wipe, 5 points for a wet cloth wipe, and the score is higher the lighter the other scores are for a wipe complete.
(4) Scratch resistance: the paint is coated on a steel plate with the thickness of 70mm multiplied by 10mm by using a GB/T2918 scratch resistance tester, the thickness of the coating is 5mm, the coating is naturally air-dried, parallel comparison is carried out under the same test conditions, the number of scratches is less than 100 and is 10 minutes, the number of scratches is 500 and 600 is 5 minutes, the number of scratches is more than 1000 and is 1 minute, and other scores are scored according to actual conditions.
(5) Low-temperature film forming property: 200g of a test sample, a substrate and a gap type wet film preparation device with the specification of 200 mu m are placed in an environment of (5 +/-1) DEG C, the test sample is taken out after 2h, the freshly taken wet film preparation device is used for blade coating once within 30s, the test plate is immediately put back (for a low-temperature box with a forced air blowing function, a metal cover is covered on the surface of the test plate during testing), the test plate is taken out after 24h, the drying degree is immediately checked according to a method of a surface dry method B in GB/T1728-1979, the appearance of a coating film is visually checked, if the coating film is dried, no crack, no flower and no obvious lockhole phenomenon exist, and if the coating film is not judged to be abnormal at 5 ℃.
(6) Odor: the mark of no obvious smell after uncovering is 10 points, the mark of pungent smell is 1 point, the middle point is graded according to the actual situation, and the higher the mark is, the clearer the taste is.
The test results are summarized in table 1.
TABLE 1
Note: all scoring items are 10 points optimal, 6 points qualified and 1 point worst; the lower the gloss value, the better.
The data in the table 1 are analyzed, so that the 60-degree gloss of a paint film formed by the water-based matte finishing varnish is below 8 degrees, the scrawling resistance is above 7 minutes, the scratch resistance is above 7 parts, the film is formed at low temperature without abnormity, the paint film does not shrink holes, the smell is above 8 minutes, and the paint film formed by the water-based matte finishing varnish has good performances in the aspects of gloss, scrawling resistance, stain resistance, scratch resistance, low-temperature film formation and smell, and has excellent comprehensive performance.
The comparative examples 1-4 and the example 3 are analyzed, and the comparative examples 1-4 are inferior to the example 3, which proves that the paint film formed by the paint prepared by the silicone-acrylic resin and the polysiloxane which have synergistic effect has better performance, and the performance of the paint film formed by the paint prepared by the silicone-acrylic resin and the polysiloxane is poor whether the silicone-acrylic resin is replaced or the polysiloxane is replaced.
Analyzing comparative example 5 and examples 3 and 5, comparative example 5 is inferior to examples 3 and 5 in performance, and it is proved that in the paint of the present invention, the silicone-acrylate resin content is too high and cracks at low temperature film forming, 65-70 parts by weight of the silicone-acrylate resin and polysiloxane have better synergistic effect, and the paint film formed by the obtained paint has better performance.
Analysis of comparative example 6 in comparison with examples 3 and 6 shows that comparative example 6 is inferior to examples 3 and 6 in performance, and it is demonstrated that in the paint of the present invention, the paint film is shrunk due to the excessively high content of polysiloxane, 0.3 to 0.5 parts by weight of polysiloxane and silicone-acrylate resin are more effective in synergy, and the paint film formed by the obtained paint has better performance.
In conclusion, the silicone-acrylic resin and polysiloxane have synergistic effect at a specific ratio, and the obtained water-based matte finishing varnish has excellent comprehensive performance.
The present invention is illustrated in detail by the examples described above, but the present invention is not limited to the details described above, i.e., it is not intended that the present invention be implemented by relying on the details described above. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
Claims (10)
1. The water-based matte finishing varnish is characterized by comprising the following components in parts by weight, based on 100 parts of the total weight of the components of the water-based matte finishing varnish: 65-70 parts of silicone-acrylate resin, 0.3-0.5 part of polysiloxane, 2-5 parts of wax dispersoid, 0.1-26 parts of auxiliary agent and 100 parts of water.
2. The aqueous matte finishing varnish according to claim 1, characterized in that the silicone-acrylic resin has a particle size of less than or equal to 0.1 μm.
3. The aqueous matte finish according to claim 1 or 2, wherein the polysiloxane comprises polydimethylsiloxane and/or polyether-polydimethylsiloxane copolymer.
4. The aqueous matte finishing varnish according to any one of claims 1 to 3, wherein the auxiliary comprises any one or a combination of at least two of defoamers, coalescents, antifreeze agents or thickeners.
5. The aqueous matte finish varnish according to claim 4, wherein the defoamer comprises a mineral oil type defoamer and/or a silicone type defoamer;
preferably, the film forming aid comprises any one or a combination of at least two of ethylene glycol butyl ether, propylene glycol methyl ether, propylene glycol ethyl ether, propylene glycol butyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monopropyl ether, dipropylene glycol monobutyl ether, tripropylene glycol n-butyl ether, propylene glycol phenyl ether, dodecyl alcohol ester, hexylene glycol butyl ether acetate or ethyl 3-ethoxypropionate;
preferably, the antifreeze agent comprises any one or a combination of at least two of ethylene glycol, propylene glycol or ethylene glycol monobutyl ether;
preferably, the thickener comprises a nonionic associative thickener;
preferably, the nonionic associative thickener comprises an ethoxylated polyurethane water-soluble polymer.
6. The aqueous matte finishing varnish according to claim 4 or 5, characterized in that the defoamer is present in an amount of 0.1 to 1 part by weight;
preferably, the film-forming assistant is 3-6 parts by weight;
preferably, the weight portion of the antifreezing agent is 0.1-1;
preferably, the weight part of the thickening agent is 0.1-0.5 part.
7. The aqueous matte finishing varnish according to any one of claims 1 to 6, characterized in that it comprises, in parts by weight:
8. a process for the preparation of the aqueous matte finishing varnish according to any one of claims 1 to 7, characterized in that it comprises the following steps:
and mixing the silicone-acrylic resin, polysiloxane, the wax dispersoid, the auxiliary agent and water according to parts by weight to obtain the water-based matte finish varnish.
9. The method of claim 8, comprising the steps of:
(1) mixing silicone-acrylic resin and a defoaming agent to obtain a first mixed solution;
(2) mixing the film forming additive, the antifreezing agent and water to obtain a second mixed solution;
(3) mixing the first mixed solution and the second mixed solution, and then sequentially mixing the mixture with polysiloxane, a thickening agent and a wax dispersion to obtain the water-based matte finish varnish;
preferably, the rotation speed of the mixing in steps (1), (2) and (3) is 300-1000rpm independently;
preferably, the mixing time is each independently 3-8 min.
10. Use of the aqueous matte finish varnish of any one of claims 1 to 7 in construction.
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