CN111534230A - Water-based UV top-coat paint and preparation method thereof - Google Patents
Water-based UV top-coat paint and preparation method thereof Download PDFInfo
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- CN111534230A CN111534230A CN202010406085.9A CN202010406085A CN111534230A CN 111534230 A CN111534230 A CN 111534230A CN 202010406085 A CN202010406085 A CN 202010406085A CN 111534230 A CN111534230 A CN 111534230A
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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
- C09D201/00—Coating compositions based on unspecified macromolecular compounds
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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
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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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)
- Paints Or Removers (AREA)
Abstract
The invention belongs to the field of coatings, and particularly relates to a water-based UV top-coat paint and a preparation method thereof, wherein the water-based UV top-coat paint comprises the following components in percentage by weight: 50-60% of water-based UV resin; 10-20% of polyurethane modified acrylate; 0.5 to 1 percent of defoaming agent; 0.8 to 1.2 percent of wetting agent; 1-2% of matt paste; 0.2 to 0.5 percent of handfeel auxiliary agent; 2-3% of a photoinitiator; 0.3 to 0.5 percent of flatting agent; 0.5 to 1 percent of thickening agent; the balance of water; wherein the photoinitiator is an amino phosphoramide acrylate initiator. The water-based UV clear finish paint prepared by the method has good transparency, good adhesive force on different clear bases, excellent chemical resistance, and good fullness and gloss stability.
Description
Technical Field
The invention belongs to the field of coatings, and particularly relates to a water-based UV top-coat paint and a preparation method thereof.
Background
With the enhancement of the environmental awareness of human beings, environmental regulations are established for the emission of Volatile Organic Compounds (VOC) in succession in various countries, and the limited emission standards are becoming stricter, aiming at encouraging the popularization and use of new products which are green, environment-friendly, energy-saving and emission-reducing. Therefore, in the field of coating, development and application of safe and low-VOC water-based, powder, high-solid, and environmentally friendly coatings are imperative. The water-based UV coating has the characteristics of multiple realizable technical approaches, wide application range, safety, relatively simple construction and the like, and is rapidly developed and popular in developed countries such as Europe and America in recent years. However, the existing water-based UV coating generally has the problems of low adhesive force on clear primer, poor transparency and fullness and the like, and needs to be improved.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides the water-based UV clear finish paint and the preparation method thereof.
The technical scheme of the invention is as follows:
a water-based UV top-coat paint comprises the following components in percentage by weight:
wherein the photoinitiator is an amino phosphoramide acrylate initiator.
The phosphoramide acrylate initiator has excellent low-energy curing characteristics, and reduces the use cost.
Further, the water-based UV clear finish paint comprises the following components in percentage by weight:
further, the defoaming agent is any one of a silicone defoaming agent, a polyether polysiloxane copolymer emulsion or a polysiloxane mixture; the wetting agent is polyether modified siloxane; the hand feeling auxiliary agent is a high molecular weight polydimethylsiloxane emulsion.
Further, the leveling agent is one or a mixture of two of polyether siloxane copolymer or polyether modified polydimethylsiloxane.
Further, the thickening agent is a mixture of nonionic associative polyether polyols of organic tin and polyether polyurethane associative.
A preparation method of a water-based UV top-coat paint comprises the following steps: firstly weighing the components according to the weight percentage, then mixing the weighed water-based UV resin and the polyurethane modified acrylate, dispersing for 5-10 min at a medium speed, sequentially adding the defoaming agent, the wetting agent, the matte slurry and the hand feeling auxiliary agent, dispersing for 15-25 min at a high speed until no shrinkage cavity exists, finally adding the photoinitiator, the flatting agent, the thickening agent and water, and dispersing to the standard viscosity at a medium speed.
Further, the photoinitiator is diluted with a hydrophilic solvent before use.
The phosphoramide acrylate initiator has excellent low-energy curing characteristics, but has different system compatibility with different aqueous UV systems, so that the initiator needs to be diluted by hydrophilic solvents such as dipropylene glycol methyl ether and the like, the dilution can promote the compatibility and prevent the coarsening, and the photoinitiator after the dilution is a transparent low-viscosity solution, so the photoinitiator is very easy to add into the system in the preparation process.
The invention has the beneficial effects that:
(1) the water-based UV clear finish paint prepared by the preparation method has the characteristic of very stable gloss under various environments, the error is within +/-3 degrees, and the water-based UV clear finish paint has very excellent adhesive force aiming at most of primers in the current market, such as excellent adhesive force on PU (polyurethane) bases, UV bases, water-based bases, AC (alternating current) bases, NC (numerically-controlled) bases and the like, and can reach the adhesive force of more than 2 levels according to the water-based UV standard; meanwhile, the coating has excellent fullness, and almost no sand mark trace is observed in a light-on observation after the coating is sprayed on the premise that the primer is polished by 320-mesh sand paper and dried.
(2) The water-based UV top-coat paint disclosed by the invention contains few hydrophilic solvents in the formula, the VOC in component resin is 0, and the VOC in an auxiliary agent contains a little VOC, so that the water-based UV top-coat paint belongs to a low-VOC system environment-friendly paint.
Detailed Description
The technical solutions of the present invention will be described in detail and fully with reference to the following specific embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. In the examples, the means used are conventional in the art, unless otherwise specified.
For a further understanding of the present invention, reference will now be made in detail to the following examples.
In each of the following examples, the defoaming agent was any one of a silicone defoaming agent, a polyether polysiloxane copolymer emulsion, or a polysiloxane mixture; the wetting agent adopts polyether modified siloxane; the hand feeling auxiliary agent adopts high molecular weight polydimethylsiloxane emulsion; the leveling agent is one or a mixture of polyether siloxane copolymer or polyether modified polydimethylsiloxane; the thickener is a mixture of non-ionic associated polyether polyol rheological additive of organic tin and polyether polyurethane associated rheological additive;
in the examples and comparative examples, the components of the species not specified were used as the components commonly used in the coating materials.
Example 1
A water-based UV top-coat paint comprises the following components in percentage by weight: 50% of water-based UV resin; 15% of polyurethane modified acrylate; 0.5 percent of defoaming agent; 0.8% of wetting agent; 1% of matte slurry; 0.2 percent of hand feeling auxiliary agent; 2% of phosphoramide acrylate initiator; 0.3 percent of flatting agent; 0.5% of thickening agent; the balance of water;
the preparation method comprises the following steps: firstly weighing the components according to the weight percentage, then mixing the weighed water-based UV resin and polyurethane modified acrylate, dispersing for 5-10 min at a medium speed, sequentially adding a defoaming agent, a wetting agent, a matte slurry and a hand feeling auxiliary agent, dispersing for 15-25 min at a high speed until no shrinkage cavity exists, finally adding an amino phosphoramide acrylate initiator diluted by dipropylene glycol methyl ether, a leveling agent, a thickening agent and water, and dispersing at a medium speed until the viscosity reaches standard.
Example 2
A water-based UV top-coat paint comprises the following components in percentage by weight: 60% of water-based UV resin; 20% of polyurethane modified acrylate; 1% of defoaming agent; 1.2% of wetting agent; 2% of matte slurry; 0.5 percent of hand feeling auxiliary agent; 3% of phosphoramide acrylate initiator; 0.5 percent of leveling agent; 1% of a thickening agent; the balance of water;
the preparation method is the same as that of example 1.
Example 3
A water-based UV top-coat paint comprises the following components in percentage by weight: 55% of water-based UV resin; 10% of polyurethane modified acrylate; 0.8 percent of defoaming agent; 1.0% of wetting agent; 1.5% of matt paste; 0.3 percent of hand feeling auxiliary agent; 2.5 percent of phosphoramide acrylate initiator; 0.4% of leveling agent; 0.7% of thickening agent; the balance of water;
the preparation method is the same as that of example 1.
Test examples
The water-based UV top-coat paint prepared in examples 1 to 3 was subjected to various resistance tests, adhesion tests, and the like.
Resistance testing was performed according to the aqueous UV standards HG/T5183-2017; adhesion test according to the one-hundred-grid test, the selected various clear bottoms are specifically: PU bottom clearing, and the number is ZP420 xx; ZK410XX, ZK clear bottom; ZN450 XX; UV bottom clearing ZU460 XX; ZW420XX ZW; each bottom cleaning is finished by 320-grade abrasive paper, and no obvious sand mark exists when the user looks at the bottom.
The test results are as follows:
the embodiment provided by the invention is an optimal scheme, the fullness is excellent, the primer is polished by No. 320 abrasive paper, and almost no sand mark exists when the primer looks bright; the transparency is good, and the adhesive force has better performance on different substrates; and the chemical resistance is better; experiments prove that the water-based UV clear finishing paint has excellent gloss stability, and the error of the water-based UV clear finishing paint is kept within +/-3 degrees under different environments.
Comparative example 1
The coating comprises the following components in percentage by weight: 70-80% of water-based UV resin; 0.5 to 1 percent of defoaming agent; 0.8 to 1.2 percent of wetting agent; 1-2% of matt paste; 0.2 to 0.5 percent of handfeel auxiliary agent; 2-3% of a photoinitiator; 0.3 to 0.5 percent of flatting agent; 0.5 to 1 percent of thickening agent; the balance of water;
the preparation method comprises the following steps: firstly weighing each component according to weight percentage, then dispersing the weighed water-based UV resin at medium speed for 5-10 min, sequentially adding a defoaming agent, a wetting agent, a matte slurry and a hand feeling auxiliary agent, dispersing at high speed for 15-25 min until no shrinkage cavity exists, finally adding a photoinitiator, a leveling agent, a thickening agent and water, and dispersing at medium speed to standard viscosity.
Test experiments:
the resistance index and the adhesion on different stocks were tested against the protocol of comparative example 1 (resistance test and adhesion test are the same as the test examples), and the specific test results are as follows:
the adhesion of the coating of comparative example 1 on various substrates is to be improved, and when the gloss stability is tested in various environments, it is found that there is a risk of large gloss fluctuation with temperature or humidity change, and that there is a risk of poor fullness and overall resistance, and thus improvement is required.
Comparative example 2
The coating comprises the following components in percentage by weight: 40-50% of water-based UV resin; 20-30% of acrylic emulsion; 0.5 to 1 percent of defoaming agent; 0.8 to 1.2 percent of wetting agent; 1-2% of matt paste; 0.2 to 0.5 percent of handfeel auxiliary agent; 2-3% of a photoinitiator; 0.3 to 0.5 percent of flatting agent; 0.5 to 1 percent of thickening agent; the balance of water;
the preparation method comprises the following steps: firstly weighing the components according to the weight percentage, then mixing the weighed water-based UV resin and acrylic emulsion, dispersing for 5-10 min at a medium speed, sequentially adding the defoaming agent, the wetting agent, the matte slurry and the hand feeling auxiliary agent, dispersing for 15-25 min at a high speed until no shrinkage cavity exists, finally adding the photoinitiator, the flatting agent, the thickening agent and water, and dispersing to a standard viscosity at a medium speed.
Test experiments:
the resistance index and the adhesion on different stocks were tested against the protocol of comparative example 1 (resistance test and adhesion test are the same as the test examples), and the specific test results are as follows:
the coating of comparative example 2 is improved in resistance, but there is a risk of adhesion on NC priming, a fully assured adhesion guarantee is not achieved, fullness is slightly improved but is still slightly poor, and in addition, resistance needs to be more than three levels to achieve better product quality guarantee, and further improvement in transparency is needed.
Comparative example 3
The coating comprises the following components in percentage by weight: 30-40% of water-based UV resin; 20-30% of polyurethane modified acrylate; 0.5 to 1 percent of defoaming agent; 0.8 to 1.2 percent of wetting agent; 1-2% of matt paste; 0.2 to 0.5 percent of handfeel auxiliary agent; 2-3% of a photoinitiator; 0.3 to 0.5 percent of flatting agent; 0.5 to 1 percent of thickening agent; the balance of water;
the preparation method comprises the following steps: firstly weighing the components according to the weight percentage, then mixing the weighed water-based UV resin and the polyurethane modified acrylate, dispersing for 5-10 min at a medium speed, sequentially adding the defoaming agent, the wetting agent, the matte slurry and the hand feeling auxiliary agent, dispersing for 15-25 min at a high speed until no shrinkage cavity exists, finally adding the photoinitiator, the flatting agent, the thickening agent and water, and dispersing to the standard viscosity at a medium speed.
Test experiments:
the resistance index and the adhesion on different stocks were tested against the protocol of comparative example 1 (resistance test and adhesion test are the same as the test examples), and the specific test results are as follows:
the coating of comparative example 3 achieved adhesion of grade 2 or more on each clear bottom and better resistance than the solutions of comparative examples 1 and 2, but the transparency still needed to be improved.
The above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalents, improvements and the like made within the scope of the present invention should be included in the patent protection scope of the present invention. It is intended that all such modifications and variations be included within the scope of the invention as claimed, without departing from the spirit thereof.
Claims (7)
1. The water-based UV clear finish paint is characterized by comprising the following components in percentage by weight:
wherein the photoinitiator is an amino phosphoramide acrylate initiator.
2. The water-based UV top-coat paint according to claim 1, characterized by comprising the following components in percentage by weight:
3. the water-based UV top-coat paint according to claim 1, wherein the defoamer is any one of a silicone defoamer, a polyether polysiloxane copolymer emulsion or a polysiloxane mixture; the wetting agent is polyether modified siloxane; the hand feeling auxiliary agent is a high molecular weight polydimethylsiloxane emulsion.
4. The water-based UV top-coat paint according to claim 1, wherein the leveling agent is one or a mixture of polyether siloxane copolymer and polyether modified polydimethylsiloxane.
5. The aqueous UV top-coat paint of claim 1, wherein the thickener is a mixture of non-ionic associated polyether polyols of organotin and polyether polyurethane association.
6. The method of preparing an aqueous UV top-coat paint according to any one of claims 1 to 5, comprising the steps of: firstly weighing the components according to the weight percentage, then mixing the weighed water-based UV resin and the polyurethane modified acrylate, dispersing for 5-10 min at a medium speed, sequentially adding the defoaming agent, the wetting agent, the matte slurry and the hand feeling auxiliary agent, dispersing for 15-25 min at a high speed until no shrinkage cavity exists, finally adding the photoinitiator, the flatting agent, the thickening agent and water, and dispersing to the standard viscosity at a medium speed.
7. The method of claim 6, wherein the photoinitiator is diluted with a hydrophilic solvent before use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010406085.9A CN111534230A (en) | 2020-05-14 | 2020-05-14 | Water-based UV top-coat paint and preparation method thereof |
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| CN202010406085.9A CN111534230A (en) | 2020-05-14 | 2020-05-14 | Water-based UV top-coat paint and preparation method thereof |
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| CN111534230A true CN111534230A (en) | 2020-08-14 |
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| CN202010406085.9A Pending CN111534230A (en) | 2020-05-14 | 2020-05-14 | Water-based UV top-coat paint and preparation method thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102827548A (en) * | 2012-09-17 | 2012-12-19 | 上海富臣化工有限公司 | Aqueous UV (ultraviolet) spray coating dull flat varnish |
| CN110128995A (en) * | 2019-04-17 | 2019-08-16 | 广东科学技术职业学院 | A kind of visible light curing adhesive and its application |
-
2020
- 2020-05-14 CN CN202010406085.9A patent/CN111534230A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102827548A (en) * | 2012-09-17 | 2012-12-19 | 上海富臣化工有限公司 | Aqueous UV (ultraviolet) spray coating dull flat varnish |
| CN110128995A (en) * | 2019-04-17 | 2019-08-16 | 广东科学技术职业学院 | A kind of visible light curing adhesive and its application |
Non-Patent Citations (1)
| Title |
|---|
| 启瑁涂装精英圈: "《LED UV固化剂和光引发剂》", 19 May 2017, HTTPS://WWW.SOHU.COM/A/141796245_174802 * |
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Application publication date: 20200814 |