CN112812662A - LED (light-emitting diode) curing high-filling vacuum spraying primer and preparation method thereof - Google Patents
LED (light-emitting diode) curing high-filling vacuum spraying primer and preparation method thereof Download PDFInfo
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- CN112812662A CN112812662A CN202110206130.0A CN202110206130A CN112812662A CN 112812662 A CN112812662 A CN 112812662A CN 202110206130 A CN202110206130 A CN 202110206130A CN 112812662 A CN112812662 A CN 112812662A
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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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
- C09D167/06—Unsaturated polyesters having carbon-to-carbon unsaturation
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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
- C09D5/002—Priming paints
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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
- C09D7/45—Anti-settling agents
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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
- C09D7/65—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
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention relates to an LED curing high-filling vacuum spraying primer and a preparation method thereof, wherein the primer consists of 30-40% of amine modified polyester acrylic resin, 5-10% of polyurethane acrylic resin, 5-10% of thermoplastic acrylic resin semi-finished product, 20-30% of DPGDA, 1-3% of ITX photoinitiator, 2-5% of TPO photoinitiator, 0.2-0.5% of acrylic leveling agent, 0.3-0.5% of non-silicon defoamer, 0.3-0.5% of wetting dispersant, 3-5% of fumed silica semi-finished product, 6-10% of talcum powder and 2-5% of high polymer resin particle powder, the obtained LED curing high-filling vacuum spraying primer is environment-friendly and high in use rate, can obtain a flat paint film on the surface of wood through one-time coating, can reduce the coating times and greatly reduce the use cost of the primer, and the paint film also has good surface dryness, adhesion, flexibility, hardness and sanding property.
Description
Technical Field
The invention belongs to the technical field of wooden furniture paint, and particularly relates to an LED curing high-filling vacuum spraying primer and a preparation method thereof.
Background
In the field of wooden furniture, small workpieces such as lines, door lines and the like are matched, and because the small workpieces are small in area and the solid content of the traditional solvent-based primer is low, the utilization rate of paint is very low when the traditional solvent-based primer is used for coating, paint waste is caused, the drying time is prolonged, the coating cost of the small workpieces is improved, the VOC (volatile organic compound) emission is also improved, and serious environmental pollution is caused. Based on the principle, the LED curing vacuum spraying coating is a spraying coating and curing mode which is carried out by adopting the principle of vacuum negative pressure, and the whole spraying process is carried out in a vacuum box body, so that the UV coating with high solid content can be continuously recycled by 100 percent, the coating cannot be wasted, and the LED curing vacuum spraying coating is particularly suitable for coating the small workpieces.
However, the existing UV vacuum spray primers suitable for LED curing vacuum spray coating have the defect of poor filling performance, and multiple coating steps are generally required to achieve the desired coating effect, which not only increases the use cost of the primers, but also affects the production efficiency of the small workpieces.
Disclosure of Invention
One of the purposes of the invention is to overcome the defects of the prior art and provide the LED curing high-filling vacuum spraying primer which has good filling performance, can reduce the coating times and greatly reduce the use cost, and has good comprehensive performance of a paint film.
The second purpose of the invention is to overcome the defects of the prior art and provide a preparation method of the LED curing high-filling vacuum spraying primer, and the preparation method has the advantages of simple process, low production cost and suitability for large-scale production.
Based on the above, the invention discloses an LED curing high-filling vacuum spraying primer, which is composed of the following raw materials in percentage by weight:
preferably, the thermoplastic acrylic resin semi-finished product is prepared by mixing HDDA and thermoplastic acrylic solid resin according to the mass ratio of 1.5:1 and stirring.
Further preferably, the preparation method of the thermoplastic acrylic resin semi-finished product comprises the following steps: and mixing the HDDA with the thermoplastic acrylic solid resin, and stirring at 800rpm for 40 minutes to obtain a thermoplastic acrylic resin semi-finished product.
Most of the commercially available thermoplastic acrylic resin is a high-solid-content product containing no solvent, and the thermoplastic acrylic resin is dissolved by selecting a UV active diluent HDDA with an adhesion force improving function to prepare a semi-finished product, so that on one hand, the requirement of the formula on the high solid content containing no solvent is met, on the other hand, the adhesion force of a paint film can be improved, and meanwhile, the addition of the thermoplastic acrylic resin semi-finished product during production is facilitated.
Preferably, the fumed silica semi-finished product is prepared from the following raw materials in percentage by weight:
further preferably, the fumed silica semi-product is prepared by the following method: firstly, mixing the epoxy acrylic resin, HDDA and a high molecular dispersant, stirring, then adding the fumed silica, stirring, and grinding until the fineness is less than 15 micrometers to obtain the fumed silica semi-product.
Still more preferably, in the method for preparing a fumed silica semi-finished product, the stirring speed after mixing the epoxy acrylic resin, the HDDA and the polymeric dispersant is 600rpm, and the stirring time is 10 minutes; the stirring rate after the addition of the fumed silica was 800rpm, and the stirring time was 40 minutes.
Still further preferably, in the method for producing a fumed silica semi-finished product, grinding is performed using a horizontal sand mill.
The fumed silica is not easy to disperse during production and addition, particles are easy to generate if the operation is not proper, the UV resin-epoxy acrylic resin and the UV active diluent-HDDA are used for pre-dispersing and grinding, the fumed silica can be well wrapped in the UV resin and the UV active diluent, meanwhile, the fumed silica is ground into small particles with the fineness of less than 15 microns, and the anti-settling effect of the fumed silica can be fully exerted.
Preferably, the polymer resin particle powder is a polymer polypropylene particle powder. Wherein, the polymer resin particle powder is mainly used for improving the filling property of the primer.
The invention also discloses a preparation method of the LED curing high-filling vacuum spraying primer, which comprises the following steps:
mixing the amine modified polyester acrylic resin, polyurethane acrylic resin, thermoplastic acrylic resin semi-finished products, DPGDA, ITX photoinitiator and TPO photoinitiator according to the formula amount, and stirring at a low speed;
adding the acrylic acid leveling agent, the non-silicon defoaming agent and the wetting dispersant, and stirring at medium speed;
and step three, adding the fumed silica semi-product, the talcum powder and the high polymer resin particle powder, and stirring at a high speed to obtain the LED curing high-filling vacuum spraying primer.
Preferably, in the first step, the low-speed stirring speed is 600rpm and the time is 20 minutes;
in the second step, the speed of the medium-speed stirring is 800rpm, and the time is 10 minutes;
in the third step, the high-speed stirring speed is 1200rpm, and the time is 30 minutes.
Compared with the prior art, the invention at least comprises the following beneficial effects:
according to the invention, the amine modified polyester acrylic resin is used as the main resin, and the amino bond of the amine modified polyester acrylic resin is utilized to enable the primer to have the effects of resisting oxygen and inhibiting polymerization, so that the surface drying of a paint film is promoted, and the hardness and the surface drying performance of the paint film are improved; the compounded polyurethane acrylic resin and the self-drying thermoplastic acrylic resin semi-finished product are used as auxiliary resins to improve the flexibility of a coating film, reduce the shrinkage of the coating film and improve the adhesion of the coating film; and reducing the viscosity by using DPGDA as a reactive diluent; compounding ITX and TPO as a photoinitiator so as to well initiate the polymerization reaction of the UV resin and the UV active diluent in the primer formula under the irradiation of an LED light source with the wavelength of 395nm to form a flat paint film; an acrylic acid leveling agent is adopted to reduce the surface tension of a coating film and improve the leveling and anti-pollution performance of the coating film; adding a non-silicon defoaming agent to improve the defoaming property of the primer; compounding talcum powder and high polymer resin particle powder as fillers to improve the filling property and the polishing property of a paint film; the fumed silica semi-product is used as an anti-settling agent to prevent filler from settling; and a wetting dispersant is added to help disperse the filler. Therefore, the primer disclosed by the invention is not only well suitable for coating in an LED curing vacuum spraying mode; the obtained primer contains no solvent, has a solid content close to 100%, belongs to an environment-friendly coating, is dried by adopting LED curing equipment, and is energy-saving and environment-friendly; the primer is coated in a closed manner by using vacuum spraying equipment, so that the utilization rate of the primer is close to 100 percent, and primer waste is basically avoided; and the talcum powder and the high polymer resin particle powder are compounded, so that the obtained primer has excellent filling property on wood, and a flat paint film can be obtained on the surface of the wood through one-time coating by matching with the main resin, the auxiliary resin, the UV active diluent, the photoinitiator ITX, TPO and other auxiliaries, so that the coating frequency of the primer can be reduced, the use cost of the primer is greatly reduced, and the paint film also has good surface drying property, adhesion, flexibility, hardness and polishing property.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments in order to make the above objects, features and advantages more apparent and understandable.
Example 1
The LED curing high-filling vacuum spraying primer of the embodiment is composed of the following raw materials in percentage by weight:
the preparation method of the thermoplastic acrylic resin semi-finished product comprises the following steps: mixing HDDA and thermoplastic acrylic solid resin according to the mass ratio of 1.5:1, and stirring at 800rpm for 40 minutes to obtain the high-performance acrylic resin.
The fumed silica semi-product is prepared from the following raw materials in percentage by weight:
wherein the preparation method of the fumed silica semi-product comprises the following steps: firstly, mixing the epoxy acrylic resin, HDDA and a high molecular dispersant, stirring for 10 minutes at 600rpm, then adding the fumed silica, stirring for 40 minutes at 800rpm, and then grinding to a fineness of less than 15 microns by using a horizontal sand mill to obtain a fumed silica semi-product.
Wherein, the macromolecular dispersant is a macromolecular dispersant commonly used in the technical field of wood primer, such as acrylate macromolecular dispersant.
Wherein, the wetting dispersant is a wetting dispersant commonly used in the technical field of wood primer, such as polycarboxylate wetting dispersant.
Wherein the polymer resin particle powder is polymer polypropylene particle powder.
The preparation method of the LED cured high-filling vacuum spray primer of the embodiment includes the following steps:
mixing the amine modified polyester acrylic resin, the polyurethane acrylic resin, the thermoplastic acrylic resin semi-finished product, the DPGDA, the ITX photoinitiator and the TPO photoinitiator according to the formula ratio, and stirring at 600rpm for 20 minutes;
adding an acrylic acid leveling agent, a non-silicon defoaming agent and a wetting dispersant, and then stirring at 800rpm for 10 minutes;
and step three, adding the fumed silica semi-product, the talcum powder and the high polymer resin particle powder, and then stirring at 1200rpm for 30 minutes to obtain the LED curing high-filling vacuum spraying primer.
Example 2
The LED curing high-filling vacuum spraying primer of the embodiment is composed of the following raw materials in percentage by weight:
the thermoplastic acrylic resin semi-finished product, the fumed silica semi-finished product, the polymeric dispersant, the wetting dispersant and the polymeric resin particle powder are as shown in example 1.
Referring to the preparation method of the LED cured high-filling vacuum spray primer of example 1, the LED cured high-filling vacuum spray primer of this example is obtained.
Example 3
The LED curing high-filling vacuum spraying primer of the embodiment is composed of the following raw materials in percentage by weight:
the thermoplastic acrylic resin semi-finished product, the fumed silica semi-finished product, the polymeric dispersant, the wetting dispersant and the polymeric resin particle powder are as shown in example 1.
Referring to the preparation method of the LED cured high-filling vacuum spray primer of example 1, the LED cured high-filling vacuum spray primer of this example is obtained.
Example 4
The LED curing high-filling vacuum spraying primer of the embodiment is composed of the following raw materials in percentage by weight:
the thermoplastic acrylic resin semi-finished product, the fumed silica semi-finished product, the polymeric dispersant, the wetting dispersant and the polymeric resin particle powder are as shown in example 1.
Referring to the preparation method of the LED cured high-filling vacuum spray primer of example 1, the LED cured high-filling vacuum spray primer of this example is obtained.
Comparative example 1
The primer of this comparative example and its preparation method are essentially the same as example 2, except that:
the primer of this comparative example replaced the amine modified polyester acrylic resin of example 1 with a polyester acrylic resin.
Comparative example 2
The primer of this comparative example and its preparation method are essentially the same as example 2, except that:
the primer of this comparative example did not have the thermoplastic acrylic resin intermediate of example 1 added.
Comparative example 3
The primer of this comparative example and its preparation method are essentially the same as example 2, except that:
the primer of this comparative example did not contain the polymer resin particle powder of example 1.
Performance testing
The primers of the examples 1 to 4 and the comparative examples 1 to 3 are respectively coated on the surface of wood in a sealing way by adopting vacuum spraying equipment, then the paint film is cured by adopting LED curing equipment with the wavelength of 395nm, and the cured paint film is tested for filling property, surface drying property, adhesion, flexibility, hardness, leveling property and sanding property, and the test results are shown in the following tables 1 to 4:
the filling property test method comprises the following steps: the solid wood panels were painted once with primer (film thickness 60 g/square) and visually inspected after curing.
The surface drying property test method comprises the following steps: after curing by ultraviolet irradiation with a wavelength of 395nm from an LED, the nail was scratched.
The test method of the adherence refers to the national standard GB/T9286.
The flexibility test method comprises the following steps: the solid wood board which had been coated once with the primer (film thickness 60 g/square) and cured was cut with a steel saw.
The test method of the hardness refers to the national standard GB/T6739.
The leveling property test method comprises the following steps: the solid wood panels were painted once with primer (film thickness 60 g/square) and visually inspected after curing.
The sanding property test method comprises the following steps: the cured primer paint film on the solid wood board was dry-ground 10 times (1 time for 1 time) by hand with 400 mesh sandpaper, and was evaluated as easy-to-grind if the paint film was easily ground to a flat and smooth surface.
TABLE 1
TABLE 2
TABLE 3
| Example 2 | Comparative example 2 | |
| Adhesion property | Level 0 | Grade 3 |
| Leveling property | The surface of the paint film is smooth | Uneven paint film surface with orange peel |
TABLE 4
| Example 2 | Comparative example 3 | |
| Filling property | OK for spraying once | OK for spraying twice |
As can be seen from tables 1-4, compared with comparative examples 1-3, the primers of examples 1-4 can be well applied to coating by LED curing vacuum spraying, a flat paint film can be obtained on the surface of wood by one-time coating, the coating times of the primers can be reduced, the use cost of the primers is greatly reduced, and the obtained primers also have good surface dryness, adhesion, flexibility, hardness and sanding property.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
The technical solutions provided by the present invention are described in detail above, and the principle and the implementation of the present invention are explained in this document by applying specific examples, and the descriptions of the above examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. The LED curing high-filling vacuum spraying primer is characterized by comprising the following raw materials in percentage by weight:
2. the LED curing high-filling vacuum spraying primer as claimed in claim 1, wherein the thermoplastic acrylic resin semi-finished product is prepared by mixing HDDA and thermoplastic acrylic solid resin according to a mass ratio of 1.5:1 and stirring.
3. The LED curing high-filling vacuum spray primer as claimed in claim 2, wherein the thermoplastic acrylic resin semi-finished product is prepared by the following steps: mixing the HDDA with thermoplastic acrylic solid resin, and stirring at 800rpm for 40 minutes to obtain the high-performance acrylic resin.
4. The LED curing high-filling vacuum spraying primer as claimed in claim 1, wherein the fumed silica semi-product is prepared from the following raw materials in percentage by weight:
5. the LED curing high-filling vacuum spray primer as claimed in claim 4, wherein the fumed silica semi-product is prepared by the following steps: firstly, mixing the epoxy acrylic resin, HDDA and a high molecular dispersant, stirring, then adding the fumed silica, stirring, and grinding until the fineness is less than 15 micrometers to obtain the fumed silica semi-product.
6. The LED curing high-filling vacuum spraying primer as claimed in claim 5, wherein in the preparation method of the fumed silica semi-product, the stirring speed of the epoxy acrylic resin, the HDDA and the polymeric dispersant after mixing is 600rpm, and the stirring time is 10 minutes; the stirring rate after the addition of the fumed silica was 800rpm, and the stirring time was 40 minutes.
7. The LED cured high-filling vacuum spray primer according to claim 5, wherein the fumed silica semi-finished product is prepared by grinding with a horizontal sand mill.
8. The LED cured high-filling vacuum spray primer according to claim 1, wherein the polymer resin particle powder is polymer polypropylene particle powder.
9. The method for preparing the LED curing high-filling vacuum spraying primer as claimed in any one of claims 1 to 8, which is characterized by comprising the following steps:
mixing the amine modified polyester acrylic resin, polyurethane acrylic resin, thermoplastic acrylic resin semi-finished products, DPGDA, ITX photoinitiator and TPO photoinitiator according to the formula amount, and stirring at a low speed;
adding the acrylic acid leveling agent, the non-silicon defoaming agent and the wetting dispersant, and stirring at medium speed;
and step three, adding the fumed silica semi-product, the talcum powder and the high polymer resin particle powder, and stirring at a high speed to obtain the LED curing high-filling vacuum spraying primer.
10. The method for preparing the LED curing high filling vacuum spraying primer according to claim 9, wherein in the step one, the low speed stirring speed is 600rpm and the time is 20 minutes;
in the second step, the speed of the medium-speed stirring is 800rpm, and the time is 10 minutes;
in the third step, the high-speed stirring speed is 1200rpm, and the time is 30 minutes.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114773942A (en) * | 2022-04-02 | 2022-07-22 | 广东希贵光固化材料有限公司 | LED curing coating |
| CN115960500A (en) * | 2022-10-27 | 2023-04-14 | 上海君子兰新材料股份有限公司 | Pine oil-sealing primer cured by UV mercury lamp light source and preparation method thereof |
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| CN114773942A (en) * | 2022-04-02 | 2022-07-22 | 广东希贵光固化材料有限公司 | LED curing coating |
| CN115960500A (en) * | 2022-10-27 | 2023-04-14 | 上海君子兰新材料股份有限公司 | Pine oil-sealing primer cured by UV mercury lamp light source and preparation method thereof |
| CN115960500B (en) * | 2022-10-27 | 2024-04-16 | 上海君子兰新材料股份有限公司 | Pine oil sealing primer solidified by UV mercury lamp light source and preparation method thereof |
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