CN112920665A - Water-based woodenware coating and preparation method thereof - Google Patents
Water-based woodenware coating and preparation method thereof Download PDFInfo
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- CN112920665A CN112920665A CN202110350142.0A CN202110350142A CN112920665A CN 112920665 A CN112920665 A CN 112920665A CN 202110350142 A CN202110350142 A CN 202110350142A CN 112920665 A CN112920665 A CN 112920665A
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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
- C09D133/00—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 at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
Abstract
The application relates to the technical field of wood coatings, and particularly discloses a water-based wood coating and a preparation method thereof. The coating is prepared from the following raw materials in parts by weight: 40-70 parts of water-based acrylic emulsion; 15-35 parts of a water-based polyurethane emulsion; 0.5-1.5 parts of a leveling agent; 3-5 parts of calcium carbonate powder; 5-10 parts of a film-forming assistant; 0.1-0.5 part of thickening agent; 1-5 parts of a grinding aid; the preparation method comprises the following steps: s1, adding the leveling agent, the film forming aid, the calcium carbonate powder and the thickening agent into a dispersion machine for dispersion and premixing for later use; s2, adding the aqueous acrylic emulsion and the aqueous polyurethane emulsion into a dispersion machine, and dispersing for 8-12min at the speed of 400-500 r/min; s3, increasing the rotation speed of the dispersion machine to 600-1200 r/min, adding the premixed material into the dispersion machine, and increasing the rotation speed of the dispersion machine to 1000-1200r/min for dispersion for 15-25 min; s4, reducing the rotation speed of the dispersion machine to 400-. The application obtains a woodware coating that coating nature is good and stand wear and tear.
Description
Technical Field
The application relates to the technical field of wood coatings, in particular to a water-based wood coating and a preparation method thereof.
Background
With the deep popularization of the environmental protection and low carbon concept, the application of the organic oil-soluble paint with high volatile organic compound VOC release is more and more restricted, and the environment-friendly water-based paint with low VOC release is more and more favored and becomes the mainstream trend of the development of the wood coatings.
The water-based wood coating is an important component in the water-based wood coating, and the wood coating which takes water as a main diluent or can be diluted by water can be called as the water-based wood coating. The water-based wood coating is mainly used for coating the surface of wood furniture, not only has the function of beautifying and decorating, but also can play a role of protecting the wood, thereby prolonging the service life of the wood furniture. As the main diluent is water, compared with the traditional solvent-based wood coating, the water-based wood coating has low VOC value, greatly reduces the harm to constructors or users, and belongs to environment-friendly coating.
However, when the existing waterborne wood coating is coated on the surface of wood, the viscosity of the coating is poor, the coating is easy to fall off on the wood, and the coating is not wear-resistant.
Disclosure of Invention
In order to obtain a woodware coating with good coating property and wear resistance, the application provides a water-based woodware coating and a preparation method thereof.
In a first aspect, the application provides an aqueous woodware coating, which adopts the following technical scheme:
the water-based wood coating is prepared from the following raw materials in parts by weight:
by adopting the technical scheme, the waterborne acrylic emulsion and the waterborne polyurethane emulsion are compounded, so that the waterborne acrylic emulsion and the waterborne polyurethane emulsion have the advantages of safety, no toxicity, no environmental pollution and the like, the unique properties of hardness and flexibility are determined by the chain segment structure consisting of the hard chain segment and the soft chain segment in the molecular structure of the polyurethane, the waterborne polyurethane has excellent low-temperature film forming property, leveling property and flexibility due to the two-phase structure, the waterborne polyurethane has the advantages of wear resistance and high hardness due to the existence of hydrogen bonds, the acrylic resin has the advantages of quick drying, good transparency, good gloss and color retention and the like, and the adhesive force, the luster and the hardness are good, so that the waterborne acrylic emulsion and the waterborne polyurethane emulsion are compounded, the effect is good in the actual use process, and the waterborne polyurethane emulsion is environment; the addition of the leveling agent enables the coating to form a flat, smooth and uniform coating film in the drying and film-forming process in the coating process of the surface of the woodware, so that the flowing smoothness of the coating is improved; the calcium carbonate powder is added into the coating, and is uniformly distributed in the coating, so that after the coating is coated on the surface of a woodware to form a film, the wear resistance of the coating is improved by the calcium carbonate powder; the addition of the film-forming additive reduces the film-forming temperature of the coating, promotes the plastic flow and elastic deformation of emulsion particles, improves the coalescence performance of the coating and facilitates the film formation of the coating; the addition of the thickening agent improves the viscosity of the coating during storage, prevents sedimentation and delamination, improves the fullness of a paint film in the coating process of the coating and enables the coating to have good fluidity; the grinding aid improves the grinding characteristics of a paint film formed by the coating.
Preferably, the aqueous acrylic emulsion is Lacper-4502.
Preferably, the aqueous polyurethane emulsion is NeoRez R-2180.
Preferably, the leveling agent is polydimethylsiloxane as an active ingredient.
Preferably, the coalescent is DPNB.
Preferably, the particle size of the calcium carbonate powder is 0.01-0.02 mm.
Preferably, the thickener is RM-8W.
In a second aspect, the application provides a preparation method of an aqueous woodenware coating, which adopts the following technical scheme:
a preparation method of the water-based wood coating comprises the following steps:
s1, adding the leveling agent, the film forming aid, the calcium carbonate powder and the thickening agent into a dispersion machine for dispersion and premixing for later use;
s2, adding the aqueous acrylic emulsion and the aqueous polyurethane emulsion into a dispersion machine, and dispersing for 8-12min at the speed of 400-500 r/min;
s3, increasing the rotating speed of the dispersion machine to 600-;
s4, reducing the rotation speed of the dispersion machine to 400-.
In summary, the present application has the following beneficial effects:
1. the coating is prepared from the following raw materials in parts by weight: 40-70 parts of water-based acrylic emulsion; 15-35 parts of a water-based polyurethane emulsion; 0.5-1.5 parts of a leveling agent; 3-5 parts of calcium carbonate powder; 5-10 parts of a film-forming assistant; 0.1-0.5 part of thickening agent; 1-5 parts of a grinding aid; the waterborne acrylic emulsion and the waterborne polyurethane emulsion are compounded, so that the waterborne acrylic emulsion and the waterborne polyurethane emulsion have the advantages of safety, no toxicity, no environmental pollution and the like, the chain segment structure consisting of the hard chain segment and the soft chain segment in the molecular structure of the polyurethane determines the unique properties of hardness and flexibility, the two-phase structure of the polyurethane enables the waterborne polyurethane to have excellent low-temperature film-forming property, leveling property and flexibility, and due to the existence of hydrogen bonds, the waterborne polyurethane has the advantages of wear resistance and high hardness; the addition of the leveling agent enables the coating to form a flat, smooth and uniform coating film in the drying and film-forming process in the coating process of the surface of the woodware, so that the flowing smoothness of the coating is improved; the calcium carbonate powder is added into the coating, and is uniformly distributed in the coating, so that after the coating is coated on the surface of a woodware to form a film, the wear resistance of the coating is improved by the calcium carbonate powder; the addition of the film-forming additive reduces the film-forming temperature of the coating, promotes the plastic flow and elastic deformation of emulsion particles, improves the coalescence performance of the coating and facilitates the film formation of the coating; the addition of the thickening agent improves the viscosity of the coating during storage, prevents sedimentation and delamination, improves the fullness of a paint film in the coating process of the coating and enables the coating to have good fluidity; the grinding aid improves the grinding characteristics of a paint film formed by the coating.
Detailed Description
The present application will be described in further detail with reference to examples.
Examples
Example 1
The coating in example 1 was prepared by the following method, including the following steps:
s1, adding 0.5 part of flatting agent, 5 parts of film-forming assistant, 3 parts of calcium carbonate powder with the particle size of 0.01-0.02 and 0.1 part of thickening agent into a dispersion machine for dispersion and premixing for later use; wherein, the effective component of the flatting agent is polydimethylsiloxane, and the film-forming assistant is DPNB; the thickening agent is RM-8W;
s2, adding 40 parts of aqueous acrylic emulsion and 15 parts of aqueous polyurethane emulsion into a dispersion machine, and dispersing for 12min at a speed of 400 r/min; wherein, the water-based acrylic emulsion is Lacper-4502; the aqueous polyurethane emulsion is NeoRez R-2180;
s3, increasing the rotating speed of the dispersion machine to 600r/min, adding the premixed material in the S1 into the dispersion machine, increasing the rotating speed of the dispersion machine to 1000r/min, dispersing for 25min, and detecting by a scraper that no shrinkage cavity exists;
and S4, reducing the rotating speed of the dispersion machine to 400r/min, adding 1 part of grinding aid into the dispersion machine, keeping the dispersion at 400r/min for 15min, and detecting to be qualified.
Example 2
The coating in example 2 was prepared by the following method, including the following steps:
s1, adding 1.5 parts of flatting agent, 10 parts of film-forming assistant, 5 parts of calcium carbonate powder with the particle size of 0.01-0.02 and 0.5 part of thickening agent into a dispersion machine for dispersion and premixing for later use; wherein, the effective component of the flatting agent is polydimethylsiloxane, and the film-forming assistant is DPNB; the thickening agent is RM-8W;
s2, adding 70 parts of aqueous acrylic emulsion and 35 parts of aqueous polyurethane emulsion into a dispersion machine, and dispersing for 8min at a speed of 500 r/min; wherein, the water-based acrylic emulsion is Lacper-4502; the aqueous polyurethane emulsion is NeoRez R-2180;
s3, increasing the rotating speed of the dispersion machine to 700r/min, adding the premixed material in the S1 into the dispersion machine, increasing the rotating speed of the dispersion machine to 1200r/min, dispersing for 15min, and detecting by a scraper plate that no shrinkage cavity exists;
and S4, reducing the rotating speed of the dispersion machine to 500r/min, adding 5 parts of grinding aid into the dispersion machine, keeping 500r/min for dispersion for 10min, and detecting to be qualified.
Example 3
The coating in example 3 was prepared by the following method, including the following steps:
s1, adding 1 part of flatting agent, 7 parts of film-forming assistant, 4 parts of calcium carbonate powder with the particle size of 0.01-0.02 and 0.4 part of thickening agent into a dispersion machine for dispersion and premixing for later use; wherein, the effective component of the flatting agent is polydimethylsiloxane, and the film-forming assistant is DPNB; the thickening agent is RM-8W;
s2, adding 50 parts of aqueous acrylic emulsion and 20 parts of aqueous polyurethane emulsion into a dispersion machine, and dispersing for 8min at a speed of 500 r/min; wherein, the water-based acrylic emulsion is Lacper-4502; the aqueous polyurethane emulsion is NeoRez R-2180;
s3, increasing the rotating speed of the dispersion machine to 700r/min, adding the premixed material in the S1 into the dispersion machine, increasing the rotating speed of the dispersion machine to 1200r/min, dispersing for 15min, and detecting by a scraper plate that no shrinkage cavity exists;
and S4, reducing the rotating speed of the dispersion machine to 500r/min, adding 3 parts of grinding aid into the dispersion machine, keeping 500r/min for dispersion for 10min, and detecting to be qualified.
Comparative example
Comparative example 1
Comparative example 1 is different from example 3 in that the raw material of comparative example 1 does not contain calcium carbonate powder.
Performance test
Detection method
The coating materials of examples 1 to 3 and comparative example 1 were mixed with water at a mixing ratio of 100: 8, spraying 3 20X 50 rectangular paint prints on the base material, wherein the spraying amount is 250g/m2. Measuring the viscosity of the paint film by using a Si deinking viscometer, wherein the standard requirement of the viscosity is that the paint film is uniformly polished five times by using sand paper at the temperature of 80-85ku/25 ℃, and the polished paint surface abrasion condition is observed to detect the paintThe abrasion resistance of the film was measured by transparency of the paint film using a photoelectric turbidimeter, and the results are shown in Table 1.
TABLE 1 Performance test data for the coatings of examples 1-3 and comparative example 1
Combining examples 1-3 with comparative example 1, and table 1, it can be seen that the coatings of the present application, with the addition of calcium carbonate, had better sandability but slightly affected the clarity of the coating after film formation, but did not differ significantly from the clarity of the coating of comparative example 1 without the addition of calcium carbonate.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (8)
1. The water-based wood coating is characterized by comprising the following raw materials in parts by weight:
2. the aqueous wood coating according to claim 1, characterized in that: the water-based acrylic emulsion is Lacper-4502.
3. The aqueous wood coating according to claim 1, characterized in that: the aqueous polyurethane emulsion is NeoRez R-2180.
4. The aqueous wood coating according to claim 1, characterized in that: the leveling agent is polydimethylsiloxane as an effective component.
5. The aqueous wood coating according to claim 1, characterized in that: the film-forming aid is DPNB.
6. The aqueous wood coating according to claim 1, characterized in that: the particle size of the calcium carbonate powder is 0.01-0.02 mm.
7. The aqueous wood coating according to claim 1, characterized in that: the thickening agent is RM-8W.
8. The preparation method of the water-based wood coating is characterized by comprising the following steps:
s1, adding the leveling agent, the film forming aid, the calcium carbonate powder and the thickening agent into a dispersion machine for dispersion and premixing for later use;
s2, adding the aqueous acrylic emulsion and the aqueous polyurethane emulsion into a dispersion machine, and dispersing for 8-12min at the speed of 400-500 r/min;
s3, increasing the rotating speed of the dispersion machine to 600-;
s4, reducing the rotation speed of the dispersion machine to 400-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110350142.0A CN112920665A (en) | 2021-03-31 | 2021-03-31 | Water-based woodenware coating and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110350142.0A CN112920665A (en) | 2021-03-31 | 2021-03-31 | Water-based woodenware coating and preparation method thereof |
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| Publication Number | Publication Date |
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| CN112920665A true CN112920665A (en) | 2021-06-08 |
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| CN202110350142.0A Withdrawn CN112920665A (en) | 2021-03-31 | 2021-03-31 | Water-based woodenware coating and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114292555A (en) * | 2021-12-31 | 2022-04-08 | 珠海展辰新材料股份有限公司 | Water-based woodenware coating, preparation method and application |
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2021
- 2021-03-31 CN CN202110350142.0A patent/CN112920665A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114292555A (en) * | 2021-12-31 | 2022-04-08 | 珠海展辰新材料股份有限公司 | Water-based woodenware coating, preparation method and application |
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Application publication date: 20210608 |
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