CN112812643A - Outdoor water-based wood coating, preparation method thereof and wood product - Google Patents
Outdoor water-based wood coating, preparation method thereof and wood product Download PDFInfo
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- CN112812643A CN112812643A CN202110161988.XA CN202110161988A CN112812643A CN 112812643 A CN112812643 A CN 112812643A CN 202110161988 A CN202110161988 A CN 202110161988A CN 112812643 A CN112812643 A CN 112812643A
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
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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
- C09D7/20—Diluents or solvents
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- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses an outdoor water-based wood coating which comprises the following components in percentage by weight: 70-90% of water-based acrylic emulsion, 5-10% of film-forming additive, 0.1-1% of wetting agent, 0.3-1% of defoaming agent, 0.3-2% of hydrophobic agent, 0.1-1% of mildew-proof bactericide, 0.1-2% of thickening agent and the balance of pure water; the thickening agent comprises digao 3010 and digao 3030, and the mass ratio of the digao 3010 to the digao 3030 is 1: 1-6. The paint film of the paint has good water resistance, and effectively solves the problems of cracking, deformation, mildewing and the like of wood. Compared with the prior art, the outdoor water-based wood coating disclosed by the invention has the advantages that the service life of wood is effectively prolonged, precious wood resources are saved, and the coating is environment-friendly, non-toxic, non-combustible, non-explosive and higher in safety by using water as a diluent.
Description
Technical Field
The invention belongs to the technical field of water-based paint, and particularly relates to outdoor water-based wood paint, a preparation method thereof and a wood product.
Background
Along with the improvement of living standard of people, people have higher and higher requirements on the beauty of landscape trees. In recent years, the research on outdoor wood coatings is receiving more and more attention. Compared with indoor wood coatings, outdoor wood coatings are required to face harsh environments such as sun and rain, acid rain dust, large cold and heat transformation range and the like, and outdoor wood is easy to deform, crack and age due to the fact that the outdoor wood is easily corroded by external illumination, high temperature, humidity and microorganisms. Therefore, outdoor waterborne wood coatings need to meet the basic performances of outdoor weather resistance, water resistance, flexibility, elasticity, mildew resistance, stain resistance, air permeability and the like.
For example, CN103881500A discloses a high weather-resistant stain-resistant water-based outdoor woodware white finish and a preparation method thereof, wherein the high weather-resistant stain-resistant water-based outdoor woodware white finish comprises the following components in percentage by weight: 28-32% of water-based pure acrylic emulsion, 28-32% of water-based self-crosslinking acrylic emulsion, 22-27% of titanium white slurry, 0.2-0.3% of defoaming agent A, 2-3% of film-forming additive, 1.5-2% of wax emulsion, 0.3-0.5% of light stabilizer, 0.5-1% of nano zinc oxide slurry, 0.1-0.15% of preservative in the first tank, 0.2-0.4% of mildew-proof and algae-proof agent, 0.2-0.3% of base material wetting agent, 0.2-0.7% of first thickening agent and 3.85-16.3% of deionized water or purified water. The high weather-resistant stain-resistant water-based outdoor woodware white surface has excellent performances of paint weather resistance, stain resistance, water resistance and the like.
Water is the first "enemy" of wood, and particularly when the moisture content of wood changes intermittently, the damage to wood is particularly great. Due to the porosity and strong hygroscopicity of the wood, the wood is easy to expand and contract in a space with large temperature and humidity changes to cause deformation and cracking, and the existing outdoor water-based paint cannot effectively prevent the wood from cracking and deforming.
Therefore, it is needed to provide an outdoor waterborne wood coating which can effectively solve the problems of cracking, deformation, mildew and the like of wood.
Disclosure of Invention
In order to solve the technical problems, the invention provides an outdoor water-based wood coating, a preparation method thereof and a wood product.
In order to achieve the purpose, the invention adopts the following technical scheme:
an outdoor water-based wood coating comprises the following components in percentage by weight: 70-90% of water-based acrylic emulsion, 5-10% of film-forming additive, 0.1-1% of wetting agent, 0.3-1% of defoaming agent, 0.3-2% of hydrophobic agent, 0.1-1% of mildew-proof bactericide, 0.1-2% of thickening agent and the balance of pure water.
Preferably, the aqueous acrylic emulsion is a silicone-acrylic emulsion.
Preferably, the film forming aid comprises dipropylene glycol butyl ether, dipropylene glycol methyl ether and alcohol ester twelve, and further preferably, the mass ratio of the dipropylene glycol butyl ether, the dipropylene glycol methyl ether and the alcohol ester twelve is 4-8: 1-5: 1; most preferably 6:3: 1.
Preferably, the wetting agent is at least one of BYK-3455, dike height 265, and dike height 270.
Preferably, the defoamer is at least one of BYK024, digao 822, and digao 825.
Preferably, the hydrophobic agent comprises dihomo phobe1505 and dihomo phobe1650, further preferably the mass ratio of dihomo phobe1505 to dihomo phobe1650 is 0.8-2: 1; most preferably 1: 1.
Preferably, the antiseptic bactericide is Dow
LX15 and/or craine clariant jmac Composite PG.
Preferably, the thickening agent comprises diquan 3010 and diquan 3030, and further preferably, the mass ratio of diquan 3010 to diquan 3030 is 1: 1-6; most preferably 1: 3.
The invention also provides a preparation method of the outdoor water-based wood coating, which comprises the following steps:
s1, sequentially adding a film-forming aid, a wetting agent and a defoaming agent into the high-speed stirred water-based acrylic emulsion, and continuously stirring at a high speed for 5-15min to obtain a material 1;
s2, sequentially adding a hydrophobic agent and an antiseptic bactericide into the material 1 stirred at a low speed to obtain a material 2;
s3, mixing the thickening agent with pure water to obtain a premixed liquid, adding the premixed liquid into the material 2 stirred at a high speed until the viscosity is 120-130ku, and stopping stirring to obtain the outdoor water-based wood coating.
Preferably, the rotation speed of the high-speed stirring in the steps S1 and S3 is 1200-1800 r/min; the rotation speed of the low-speed stirring in the step S2 is 400-800 r/min.
Preferably, the addition rate of the film forming aid, the wetting agent and the defoaming agent in the step S1 is 5-10 ml/S.
Preferably, the adding speed of the water repellent agent and the antiseptic bactericide in the step S2 is 5-10 ml/S.
Preferably, the addition rate of the premix in step S3 is 5-10 ml/S.
The invention also provides a wooden product, and the outdoor water-based wooden product paint or the outdoor water-based wooden product paint prepared by the preparation method is sprayed on the surface of the wooden product.
The invention has the beneficial effects that:
the invention adopts the mutual penetration technical theory, optimizes various raw materials and the mixture ratio of the raw materials, and adds functional additives, so that the water resistance of a paint film is increased, and the problems of cracking, deformation, mildewing and the like of wood are effectively solved. Compared with the prior art, the outdoor water-based wood coating disclosed by the invention has the advantages that the service life of wood is effectively prolonged, precious wood resources are saved, and the coating is environment-friendly, non-toxic, non-combustible, non-explosive and higher in safety by using water as a diluent.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention are further described below.
When numerical ranges are given in the examples, it is understood that both endpoints of each of the numerical ranges and any value therebetween can be selected unless the invention otherwise indicated. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
The raw materials used in the present invention are all common commercial products unless otherwise specified.
Basic embodiment of outdoor water-based wood coating and preparation method thereof
An outdoor water-based wood coating comprises the following components in percentage by weight: 70-90% of water-based acrylic emulsion, 5-10% of film-forming additive, 0.1-1% of wetting agent, 0.3-1% of defoaming agent, 0.3-2% of hydrophobic agent, 0.1-1% of mildew-proof bactericide, 0.1-2% of thickening agent and the balance of pure water.
Preferably, the water-based acrylic emulsion is a silicone-acrylate emulsion, the silicone-acrylate emulsion is an emulsion obtained by polymerizing an organosilicon monomer containing an unsaturated bond and an acrylic monomer through a core-shell coating polymerization process, and the emulsion has the characteristics of high temperature resistance, weather resistance, chemical resistance, hydrophobicity, low surface energy, low pollution resistance, high color retention property, flexibility, adhesiveness and the like of organosilicon resin.
Preferably, the film forming aid comprises dipropylene glycol butyl ether, dipropylene glycol methyl ether and alcohol ester twelve, and further preferably, the mass ratio of the dipropylene glycol butyl ether, the dipropylene glycol methyl ether and the alcohol ester twelve is 4-8: 1-5: 1; most preferably 6:3:1, which can more effectively lower the emulsion film-forming temperature and help the coating to form a better film at low temperature.
Preferably, the wetting agent is at least one of BYK-3455, dike height 265, and dike height 270. The wetting agent can strongly reduce the dynamic and static surface tension of a system, thereby remarkably improving the wetting capacity and the leveling property of a base material, better wetting a substrate which is very difficult to wet, such as wood with multiple pores and rough surface, and improving the adhesion of a paint film to the wood.
Preferably, the defoaming agent is at least one of BYK024, Digao 822 and Digao 825, and the defoaming agent can effectively prevent foams and avoid rainwater from entering and damaging wood due to damage of compactness of a paint film by bubbles.
Preferably, the hydrophobic agent comprises dihomo phobe1505 and dihomo phobe1650, further preferably the mass ratio of dihomo phobe1505 to dihomo phobe1650 is 0.8-2: 1; most preferably 1: 1. The water repellent can provide good early water resistance and strong water drop effect for outdoor water-borne wood coatings.
Preferably, the antiseptic bactericide is Dow
LX15 and/or Clariant JMAC Composite PG, which can rapidly inhibit the growth of microorganisms and the inhibition is irreversible, and finally leads to cell death, thereby better protecting wood and preventing mildew.
Preferably, the thickening agent comprises diquan 3010 and diquan 3030, and further preferably, the mass ratio of diquan 3010 to diquan 3030 is 1: 1-6; most preferably 1: 3; the thickener is matched with the paint and the coating for use, so that the paint construction is convenient, and the defects of coating sagging, thick edges and the like are prevented.
The invention also provides a preparation method of the outdoor water-based wood coating, which comprises the following steps:
s1, sequentially adding a film-forming aid, a wetting agent and a defoaming agent into the high-speed stirred water-based acrylic emulsion, and continuously stirring at a high speed for 5-15min to obtain a material 1;
s2, sequentially adding a hydrophobic agent and an antiseptic bactericide into the material 1 stirred at a low speed to obtain a material 2;
s3, mixing the thickening agent with pure water to obtain a premixed liquid, adding the premixed liquid into the material 2 stirred at a high speed until the viscosity is 120-130ku, and stopping stirring to obtain the outdoor water-based wood coating.
Preferably, the rotation speed of the high-speed stirring in the steps S1 and S3 is 1200-1800 r/min; the rotation speed of the low-speed stirring in the step S2 is 400-800 r/min.
Preferably, the addition rate of the film forming aid, the wetting agent and the defoaming agent in the step S1 is 5-10 ml/S.
Preferably, the adding speed of the water repellent agent and the antiseptic bactericide in the step S2 is 5-10 ml/S.
Preferably, the addition rate of the premix in step S3 is 5-10 ml/S.
Example 1-5 an outdoor waterborne wood coating and a method for preparing the same
The compositions and amounts of the outdoor waterborne wood coatings described in examples 1-5 are shown in table 1.
TABLE 1 composition and amount (in weight percent) of outdoor waterborne wood coating
The preparation method of the outdoor water-based wood coating comprises the following steps:
s1, adding the water-based acrylic emulsion into a stirring tank, sequentially adding the film-forming aid, the wetting agent and the defoaming agent into the stirring tank at the adding speed of 8ml/S at the stirring speed of 1500r/min, and continuously stirring for 10 minutes to obtain a material 1;
s2, sequentially adding a hydrophobing agent and a mildew-proof bactericide into the material 1 obtained in the step S1 at a stirring speed of 600r/min and a speed of 8ml/S to obtain a material 2;
s3, mixing the thickening agent with pure water to obtain a premixed liquid, adding the premixed liquid into the material 2 obtained in the step S2 at an adding speed of 8ml/S at a stirring speed of 1500r/min until the viscosity is 125ku, and stopping stirring to obtain the outdoor water-based wood paint.
Comparative example 1
The comparative example differs from example 5 in that the coalescent was dipropylene glycol butyl ether, dipropylene glycol methyl ether and alcohol ester twelve in a mass ratio of 3:6: 1; the hydrophobic agent is dihomo phobe1505 and dihomo phobe1650 with the mass ratio of 4: 1; the thickening agent is composed of digao 3010 and digao 3030 in a mass ratio of 1: 1.
Comparative example 2
This comparative example differs from example 5 in that the hydrophobizing agent is dihpobe 1505 and dihpobe 1650 in a mass ratio of 1: 4; the thickening agent is composed of digao 3010 and digao 3030 in a mass ratio of 1: 8. .
Comparative example 3
The difference between the comparative example and the example 5 is that the outdoor water-based wood coating comprises the following components in percentage by weight: 80% of water-based acrylic emulsion, 12% of film-forming additive, 0.5% of wetting agent, 0.6% of defoaming agent, 0.2% of hydrophobic agent, 3% of mildew-proof bactericide, 0.08% of thickening agent and the balance of pure water.
Cracking resistance test
The outdoor waterborne wood coatings prepared in examples 1-5 and comparative examples 1-3 were used to treat cedar wood, respectively, with a paint film thickness of 50 μm, and untreated cedar wood was used as a control, the same lot of cedar wood was used, the treated wood was processed into the same wood product, the wood product was soaked in water at 50 ℃ for 8h, air-dried at 2 ℃ and fully soaked and air-dried for 5 cycles, and then the deformation, radius of curvature and recovery rate of the wood product were measured and recorded, and the results are shown in table 2.
TABLE 2
| Group of | Curvature | Recovery rate% | Condition of deformation | Water absorption |
| Example 1 | 0.239 | 90 | Is invisible to naked eyes and has no crack | Weak (weak) |
| Example 2 | 0.230 | 91 | Is invisible to naked eyes and has no crack | Weak (weak) |
| Example 3 | 0.213 | 92 | Is invisible to naked eyes and has no crack | Weak (weak) |
| Example 4 | 0.192 | 94 | Is invisible to naked eyes and has no crack | Weak (weak) |
| Example 5 | 0.187 | 97 | Is invisible to naked eyes and has no crack | Weak (weak) |
| Comparative example 1 | 0.644 | 78 | Visible to the naked eye and with few cracks | Medium and high grade |
| Comparative example 2 | 0.607 | 80 | Visible to the naked eye and with few cracks | Medium and high grade |
| Comparative example 3 | 0.681 | 76 | Visible to the naked eye and with few cracks | Medium and high grade |
| Control group | 0.792 | 56 | Visible to the naked eye and with few cracks | Medium and high grade |
As can be seen from the above table, the outdoor waterborne wood coatings prepared by the embodiments 1 to 5 of the invention have strong water resistance, bending resistance and cracking resistance, and solve the problem that the existing wood is easy to deform and crack.
Secondly, testing the mildew resistance
4-year-old moso bamboos with the size of 50mmx20mmx5mm were selected as wood samples and were respectively treated with the outdoor waterborne wood coatings prepared in examples 1-5 and comparative examples 1-3 of the present invention, the number of repetitions of each group was 20, and the thickness of the paint film was 50 μm, wherein the wood samples in the control group were not treated, and the samples were subjected to the mildew resistance test with reference to GB/T18261-2013, and the experimental results are shown in table 3.
TABLE 3
The above table shows that the mildew-proof control efficiency of the wood treated by the outdoor water-based wood coating is more than 90%, and the outdoor water-based wood coating prepared by the invention has good mildew-proof performance.
It should be emphasized that the embodiments described herein are illustrative rather than restrictive, and thus the present invention is not limited to the embodiments described in the detailed description, but also includes other embodiments that can be derived from the technical solutions of the present invention by those skilled in the art.
Claims (10)
1. The outdoor water-based wood coating is characterized by comprising the following components in percentage by weight: 70-90% of water-based acrylic emulsion, 5-10% of film-forming additive, 0.1-1% of wetting agent, 0.3-1% of defoaming agent, 0.3-2% of hydrophobic agent, 0.1-1% of mildew-proof bactericide, 0.1-2% of thickening agent and the balance of pure water;
the thickening agent comprises digao 3010 and digao 3030, and the mass ratio of the digao 3010 to the digao 3030 is 1: 1-6.
2. The outdoor water-borne wood coating according to claim 1, wherein the water-borne acrylic emulsion is a silicone-acrylic emulsion.
3. The outdoor waterborne wood coating according to claim 1, wherein the coalescent comprises dipropylene glycol butyl ether, dipropylene glycol methyl ether, and alcohol ester twelve.
4. The outdoor waterborne wood coating of claim 1, wherein the wetting agent is at least one of BYK-3455, Digao 265, and Digao 270.
5. The outdoor waterborne wood coating of claim 1, wherein the defoamer is at least one of BYK024, Digao 822 and Digao 825.
6. The outdoor waterborne wood coating of claim 1, wherein the hydrophobic agent comprises dihomo phobe1505 and dihomo phobe 1650.
7. The outdoor water-based wood coating according to claim 1, wherein the corrosion and sterilization agent is Dow
LX15 and/or craine clariant jmac Composite PG.
8. The preparation method of the outdoor aqueous woodenware coating according to any one of claims 1 to 7, comprising the following steps:
s1, sequentially adding a film-forming aid, a wetting agent and a defoaming agent into the high-speed stirred water-based acrylic emulsion, and continuously stirring at a high speed for 5-15min to obtain a material 1;
s2, sequentially adding a hydrophobic agent and an antiseptic bactericide into the material 1 stirred at a low speed to obtain a material 2;
s3, mixing the thickening agent with pure water to obtain a premixed liquid, adding the premixed liquid into the material 2 stirred at a high speed until the viscosity is 120-130ku, and stopping stirring to obtain the outdoor water-based wood coating.
9. The method as claimed in claim 8, wherein the rotation speed of the high speed stirring in steps S1 and S3 is 1200-1800 r/min; the rotation speed of the low-speed stirring in the step S2 is 400-800 r/min.
10. A wood product, characterized in that the surface of the wood product is sprayed with the outdoor waterborne wood coating of any one of claims 1 to 7 or the outdoor waterborne wood coating prepared by the preparation method of any one of claims 8 to 9.
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