CN114574084A - Water-based double-component high-scratch-resistance transparent finish paint and preparation method thereof - Google Patents
Water-based double-component high-scratch-resistance transparent finish paint and preparation method thereof Download PDFInfo
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- CN114574084A CN114574084A CN202210243184.9A CN202210243184A CN114574084A CN 114574084 A CN114574084 A CN 114574084A CN 202210243184 A CN202210243184 A CN 202210243184A CN 114574084 A CN114574084 A CN 114574084A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 87
- 239000003973 paint Substances 0.000 title claims abstract description 56
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 106
- 239000000839 emulsion Substances 0.000 claims abstract description 35
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 31
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 26
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 26
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 24
- 239000002562 thickening agent Substances 0.000 claims abstract description 23
- 239000000945 filler Substances 0.000 claims abstract description 20
- 239000000049 pigment Substances 0.000 claims abstract description 18
- 238000007790 scraping Methods 0.000 claims abstract description 18
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 17
- 239000002270 dispersing agent Substances 0.000 claims abstract description 15
- 238000009736 wetting Methods 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims description 34
- 230000003678 scratch resistant effect Effects 0.000 claims description 30
- 239000011259 mixed solution Substances 0.000 claims description 29
- 238000002156 mixing Methods 0.000 claims description 21
- 239000000843 powder Substances 0.000 claims description 18
- 230000009477 glass transition Effects 0.000 claims description 11
- 239000006185 dispersion Substances 0.000 claims description 9
- 239000011521 glass Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- CUDYYMUUJHLCGZ-UHFFFAOYSA-N 2-(2-methoxypropoxy)propan-1-ol Chemical group COC(C)COC(C)CO CUDYYMUUJHLCGZ-UHFFFAOYSA-N 0.000 claims description 6
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims description 6
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 6
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims description 6
- 239000002480 mineral oil Substances 0.000 claims description 6
- 235000010446 mineral oil Nutrition 0.000 claims description 6
- 229920000570 polyether Polymers 0.000 claims description 6
- 229920001228 polyisocyanate Polymers 0.000 claims description 6
- 239000005056 polyisocyanate Substances 0.000 claims description 6
- 239000004814 polyurethane Substances 0.000 claims description 6
- 229920002635 polyurethane Polymers 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- 150000003376 silicon Chemical class 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 abstract description 2
- 239000001993 wax Substances 0.000 description 30
- 235000013305 food Nutrition 0.000 description 25
- 239000000126 substance Substances 0.000 description 10
- 238000004132 cross linking Methods 0.000 description 9
- 238000005452 bending Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 241001330498 Corsia Species 0.000 description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 239000013530 defoamer Substances 0.000 description 3
- 239000004200 microcrystalline wax Substances 0.000 description 3
- 229940114937 microcrystalline wax Drugs 0.000 description 3
- 235000019808 microcrystalline wax Nutrition 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000006748 scratching Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 235000008446 instant noodles Nutrition 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- FEWFXBUNENSNBQ-UHFFFAOYSA-N 2-hydroxyacrylic acid Chemical compound OC(=C)C(O)=O FEWFXBUNENSNBQ-UHFFFAOYSA-N 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000021110 pickles Nutrition 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
-
- 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
-
- 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
- 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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- 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)
- Paints Or Removers (AREA)
Abstract
The invention relates to the technical field of coatings, and particularly relates to a water-based double-component high-scratch-resistance transparent finish paint and a preparation method thereof, wherein the water-based double-component high-scratch-resistance transparent finish paint is composed of an agent A and an agent B in a weight ratio of 100 (20-35), wherein the agent A comprises the following raw materials in parts by weight: 70-80 parts of water-based hydroxyl acrylic resin, 0.5-1.5 parts of wetting dispersant, 1-5 parts of anti-scraping wax emulsion, 0.5-1 part of anti-scraping auxiliary agent, 0.5-1 part of defoaming agent, 0.5-1 part of thickening agent, 2-5 parts of pigment and filler, 2-5 parts of film-forming auxiliary agent and the balance of water; the agent B is a water-based curing agent. The transparent finish paint prepared by the invention has excellent scratch resistance and wear resistance.
Description
Technical Field
The invention relates to the technical field of coatings, and particularly relates to a water-based double-component high-scratch-resistance transparent finish paint and a preparation method thereof.
Background
With the increasing requirements of the country on environmental protection and the enhancement of public environmental awareness, the demands of consumers on environment-friendly products are more vigorous, and the corresponding functional requirements on the products are more diversified, such as the requirements on scratch resistance and wear resistance of paint films on furniture surfaces, however, the scratch resistance and wear resistance of the water-based finish paint on the market at present cannot meet the requirements.
Disclosure of Invention
The invention aims to provide a water-based double-component high scratch-resistant transparent finish paint and a preparation method thereof aiming at overcoming the defects of the prior art, and aims to solve the problem that the water-based finish paint on the market is poor in scratch resistance and wear resistance.
Based on the above, the invention provides a water-based double-component high scratch-resistant transparent finish paint, which consists of an agent A and an agent B in a weight ratio of 100 (20-35), wherein the agent A comprises the following raw materials in parts by weight:
the balance of water;
the agent B is a water-based curing agent.
Preferably, the weight ratio of the agent A and the agent B is 100: 25.
Preferably, the aqueous curing agent is a Corsia XP2655 polyisocyanate curing agent, and can react with aqueous hydroxy acrylic resin at room temperature to improve the crosslinking density of a paint film, so that the hardness and scratch resistance of the paint film are improved.
Preferably, the aqueous hydroxy acrylic resin is a hydroxy acrylic secondary dispersion with the hydroxyl value content of 3.8% and the solid content of 45%, and the glass transition temperature of the aqueous hydroxy acrylic resin is 20-72 ℃, so that the aqueous hydroxy acrylic resin has the characteristics of high hardness, good scratch resistance and excellent chemical resistance.
Preferably, the wetting dispersant is water-based polyether modified siloxane with long and short molecular chain segments.
Preferably, the anti-scraping wax emulsion is Luborun FA-6546 wax emulsion, MICRO LUBE 124.S wax emulsion or Pickle chemical BYK539 wax emulsion.
Preferably, the anti-scratch assistant is an ultra-high molecular weight silicone derivative.
Preferably, the defoamer is a water-based silicone defoamer or a mineral oil defoamer.
Preferably, the thickener is an associative polyurethane thickener.
Preferably, the color filler is matting powder, transparent powder or glass powder.
Further preferably, the pigment and filler is glass powder, and the effect of improving the scratch resistance and the wear resistance of the paint film is most obvious.
Preferably, the film forming aid is dipropylene glycol methyl ether or ethylene glycol monobutyl ether.
The invention also provides a preparation method of the water-based double-component high-scratch-resistance transparent finish paint, which comprises the following steps:
first step, preparation of agent A
S1, mixing and dispersing the water-based hydroxyl acrylic resin and the pigment and filler according to the formula ratio to obtain a first mixed solution;
s2, sequentially adding the defoaming agent, the scraping-resistant auxiliary agent, the scraping-resistant wax emulsion and the wetting dispersant in the formula ratio into the first mixed solution, and uniformly stirring to obtain a second mixed solution;
s3, mixing the film-forming aid and water according to the formula amount, slowly adding the mixture into the second mixed solution, stirring for a certain time, adding the thickener according to the formula amount, and uniformly stirring to obtain the agent A;
and step two, uniformly mixing the agent A and the agent B according to the weight ratio to obtain the water-based double-component high-scratch-resistance transparent finish paint.
Preferably, in step S1, the dispersion is carried out at a stirring speed of 800-1200rpm/min for 8-12 minutes.
Preferably, in step S2, the dispersion is carried out at a stirring speed of 600-1000rpm/min for 8-12 minutes.
Preferably, in step S3, the film-forming aid and water are slowly added into the second mixture after being mixed according to the formula amount, and dispersed for 4-6 minutes at the stirring speed of 500-700rpm/min, and then the thickener is added according to the formula amount, and dispersed for 8-12 minutes at the stirring speed of 500-700rpm/min, so as to obtain the agent A.
The invention has the beneficial effects that:
the invention is characterized in that through a simple production process, the weight ratio of the agent A to the agent B is limited to 100 (20-35), the agent A comprises 70-80 parts of water-based hydroxyl acrylic resin, 0.5-1.5 parts of wetting dispersant, 1-5 parts of scratch-resistant wax emulsion, 0.5-1 part of scratch-resistant auxiliary agent, 0.5-1 part of defoaming agent, 0.5-1 part of thickening agent, 2-5 parts of pigment and filler, 2-5 parts of film-forming auxiliary agent and the balance of water, and the agent B is a water-based curing agent, so that the prepared water-based bi-component finish paint has excellent adhesion, water resistance, alcohol resistance, scratch resistance, wear resistance and hardness, and smooth hand feeling.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more apparent, the present invention is further described in detail below with reference to the following embodiments. It should be understood, however, that the description herein of specific embodiments is intended to illustrate and not limit the invention.
The invention relates to a water-based double-component high-scratch-resistance transparent finish paint which consists of an agent A and an agent B in a weight ratio of 100 (20-35), wherein the agent A comprises the following raw materials in parts by weight:
the balance of water;
the agent B is a water-based curing agent.
The waterborne curing agent is a Corsia XP2655 polyisocyanate curing agent, can react with waterborne hydroxy acrylic resin at room temperature, and improves the crosslinking density of a paint film, so that the hardness and the scratch resistance of the paint film are improved.
The water-based hydroxy acrylic resin is a hydroxy acrylic acid secondary dispersion with the hydroxyl value content of 3.8% and the solid content of 45%, the glass transition temperature of the water-based hydroxy acrylic resin is 20-72 ℃, and the water-based hydroxy acrylic resin has the characteristics of high hardness, good scratch resistance and excellent chemical resistance.
The wetting dispersant is water-based polyether modified siloxane with alternate long and short molecular chain segments.
The scratch-resistant wax emulsion is Luborun FA-6546 wax emulsion, MICRO LUBE 124.S wax emulsion or Pickering chemical BYK539 wax emulsion, and is PTFE type microcrystalline wax emulsion to improve the scratch resistance of a paint film.
Wherein the anti-scratching auxiliary agent is an organic silicon derivative with ultrahigh molecular weight.
Wherein the defoaming agent is a water-based organic silicon defoaming agent or a mineral oil defoaming agent.
Wherein the thickener is an associative polyurethane thickener.
Wherein the pigment filler is matting powder, transparent powder or glass powder.
Wherein the film-forming assistant is dipropylene glycol methyl ether or ethylene glycol monobutyl ether.
The invention also provides a preparation method of the waterborne double-component high-scratch-resistance transparent finish paint, which comprises the following steps:
first step, preparation of agent A
S1, mixing the water-based hydroxyl acrylic resin and the pigment and filler according to the formula ratio, and dispersing for 8-12 minutes at the stirring speed of 800-1200rpm/min to obtain a first mixed solution;
s2, sequentially adding the defoaming agent, the scraping-resistant auxiliary agent, the scraping-resistant wax emulsion and the wetting dispersant in the formula ratio into the first mixed solution, and dispersing for 8-12 minutes at the stirring speed of 600-1000rpm/min to obtain a second mixed solution;
s3, mixing the film-forming assistant and water according to the formula amount, slowly adding the mixture into the second mixed solution, dispersing for 4-6 minutes at the stirring speed of 500-700rpm/min, then adding the thickener according to the formula amount, and dispersing for 8-12 minutes at the stirring speed of 500-700rpm/min to obtain the agent A;
and step two, uniformly mixing the agent A and the agent B according to the weight ratio to obtain the water-based double-component high-scratch-resistance transparent finish paint.
Example 1
The aqueous double-component high scratch-resistant transparent finishing coat comprises an agent A and an agent B in a weight ratio of 100:20, wherein the agent A comprises the following raw materials in parts by weight:
the balance of water;
the agent B is a water-based curing agent.
The embodiment also provides a preparation method of the waterborne double-component high scratch-resistant transparent finish paint, which comprises the following steps:
first step, preparation of agent A
S1, mixing the water-based hydroxy acrylic resin and the pigment and filler according to the formula ratio, and dispersing for 10 minutes at a stirring speed of 1000rpm/min to obtain a first mixed solution;
s2, sequentially adding the defoaming agent, the scraping-resistant auxiliary agent, the scraping-resistant wax emulsion and the wetting dispersant in the formula ratio into the first mixed solution, and dispersing for 10 minutes at the stirring speed of 800rpm/min to obtain a second mixed solution;
s3, mixing the film-forming aid and water according to the formula amount, slowly adding the mixture into the second mixed solution, dispersing for 5 minutes at the stirring speed of 600rpm/min, then adding the thickener according to the formula amount, and dispersing for 10 minutes at the stirring speed of 600rpm/min to obtain the agent A;
and step two, uniformly mixing the agent A and the agent B according to the weight ratio to obtain the water-based double-component high-scratch-resistance transparent finish paint.
Example 2
This example was prepared analogously to example 1, with the difference that, on the basis of example 1, the weight ratio of agent a to agent B in this example was 100: 25.
example 3
This example was prepared analogously to example 1, with the difference that, on the basis of example 1, the weight ratio of agent a to agent B in this example was 100: 35.
the aqueous two-component topcoats prepared in examples 1-3 were tested for performance under the same conditions and the same criteria as shown in table 1.
TABLE 1
| Example 1 | Example 2 | Example 3 | |
| An agent A: agent B | 100：20 | 100：25 | 100：35 |
| Theoretical crosslink density | 1.35 | 1.7 | 2.05 |
| Scratch resistance | Good wine | Superior food | Superior food |
| Wear resistance | Superior food | Superior food | Superior food |
| Transparency of | In general | In general | In general |
| Dark bubble | Is free of | Is free of | Slight dark bubble |
| Water resistance | Superior food | Youyou (an instant noodle) | Superior food |
| Hardness of | H | H | H |
| Resistant to bending | 5mm OK | 5mm OK | 5mm OK |
From the results in Table 1, it can be seen that under otherwise identical conditions, when the theoretical crosslinking density is lower (as in example 1), increasing the weight ratio of agent A to agent B advantageously increases the theoretical crosslinking density and thus increases the scratch resistance of the paint film, but, when the theoretical crosslinking density is higher than 1.7 (i.e. example 3), increasing the weight ratio of agent A to agent B does not only no longer significantly improve the scratch resistance of the paint film, but also, an excessively high crosslinking density leads to the occurrence of dark bubbles in the paint film. Thus, the weight ratio of agent a to agent B is 100:25 have optimal performance.
Example 4
This example was prepared in a similar manner to example 1, except that the glass transition temperature of the aqueous hydroxyacrylic resin of this example was 20 ℃ based on example 1.
Example 5
This example was prepared in a similar manner to example 1, except that the glass transition temperature of the aqueous hydroxyacrylic resin of this example was 45 ℃ on the basis of example 1.
Example 6
This example was prepared similarly to example 1, except that the aqueous hydroxyacrylic resin of this example had a glass transition temperature of 72 ℃ based on example 1.
The waterborne two-component topcoats prepared in examples 4-6 were tested for performance under the same conditions and the same standards, as shown in Table 2.
TABLE 2
| Example 4 | Example 5 | Example 6 | |
| Scratch resistance | Difference (D) | In general | Good wine |
| Wear resistance | In general | In general | In general |
| Transparency of | Superior food | Superior food | In general |
| Water resistance | Superior food | Superior food | Superior food |
| Hardness of | HB | F | H |
| Resistant to bending | 2mm OK | 2mm OK | 5mm OK |
As can be seen from the data in Table 2, the water-based hydroxy acrylic resin with the glass transition temperature of 72 ℃ is beneficial to improving the hardness, the scratch resistance and the bending resistance of the paint film.
Example 7
This example was prepared in a similar manner to example 1, except that, based on example 1, the scratch-resistant wax emulsion of this example was a Luoborun FA-6546 wax emulsion.
Example 8
This example was prepared in a similar manner to example 1, except that based on example 1, the scratch-resistant wax emulsion of this example was a MICHEM LUBE 124.S wax emulsion.
Example 9
This example was prepared in a similar manner to example 1, except that based on example 1, the scratch resistant wax emulsion of this example was a BYK539 wax emulsion.
The aqueous two-component topcoats prepared in examples 7-9 were tested for performance under the same conditions and the same criteria as shown in table 3.
TABLE 3
| Example 7 | Example 8 | Example 9 | |
| Scratch resistance | Good wine | Good wine | Good quality |
| Wear resistance | In general | In general | In general |
| Transparency of | In general terms | In general terms | In general |
| Water resistance | Superior food | Youyou (an instant noodle) | Superior food |
| Hardness of | H | H | H |
| Resistant to bending | 5mm OK | 5mm OK | 5mm OK |
As can be seen from the data in Table 3, the selection of the type of the scratch-resistant wax emulsion has no substantial influence on the properties of the paint film.
Example 10
This example was prepared in a similar manner to example 1, except that the pigment and filler in this example was a matting powder based on example 1.
Example 11
This example was prepared similarly to example 1, except that the pigment and filler in this example was transparent powder based on example 1.
Example 12
This example was prepared in a similar manner to example 1, except that the pigment and filler in this example was glass frit based on example 1.
The aqueous two-component topcoats prepared in examples 10-12 were tested for performance under the same conditions and the same criteria as shown in table 4.
TABLE 4
| Example 10 | Example 11 | Example 12 | |
| Scratch resistance | Good wine | Good wine | Superior food |
| Wear resistance | In general | In general | Superior food |
| Transparency of | In general | In general | In general |
| Water resistance | Superior food | Superior food | Superior food |
| Hardness of | H | H | H |
| Resistant to bending | 5mm OK | 5mm OK | 5mm OK |
As can be seen from the data in Table 4, the matting powder and the clear powder improve the scratch resistance of the paint film only slightly, whereas the glass powder improves the scratch resistance of the paint film significantly.
The invention is illustrated by the following three examples, combining the data in tables 1-4 and the technical solutions of examples 1-12.
Example 13
The water-based double-component high-scratch-resistant transparent finish paint consists of an agent A and an agent B in a weight ratio of 100:25, wherein the agent A comprises the following raw materials in parts by weight:
the balance of water;
the agent B is a water-based curing agent.
The waterborne curing agent is a Corcex XP2655 polyisocyanate curing agent, and can react with waterborne hydroxyl acrylic resin at room temperature to improve the crosslinking density of a paint film, so that the hardness and the scratch resistance of the paint film are improved.
The water-based hydroxy acrylic resin is a hydroxy acrylic secondary dispersion with the hydroxyl value content of 3.8% and the solid content of 45%, and has the glass transition temperature of 72 ℃, and has the characteristics of high hardness, good scratch resistance and excellent chemical resistance.
The wetting dispersant is water-based polyether modified siloxane with alternate long and short molecular chain segments.
The scratch-resistant wax emulsion is a Pickering chemical BYK539 wax emulsion which is a PTFE type micro-crystallization wax emulsion so as to improve the scratch resistance of a paint film.
Wherein the scratch-resistant auxiliary agent is an organic silicon derivative with ultrahigh molecular weight.
Wherein the defoaming agent is a water-based organic silicon defoaming agent or a mineral oil defoaming agent.
Wherein the thickener is an associative polyurethane thickener.
Wherein, the pigment filler is glass powder.
Wherein the film-forming assistant is dipropylene glycol methyl ether or ethylene glycol monobutyl ether.
The embodiment also provides a preparation method of the waterborne double-component high scratch-resistant transparent finish paint, which comprises the following steps:
first step, preparation of agent A
First step, preparation of agent A
S1, mixing the water-based hydroxyl acrylic resin and the pigment and filler according to the formula ratio, and dispersing for 10 minutes at a stirring speed of 1000rpm/min to obtain a first mixed solution;
s2, sequentially adding the defoaming agent, the scraping-resistant auxiliary agent, the scraping-resistant wax emulsion and the wetting dispersant in the formula ratio into the first mixed solution, and dispersing for 10 minutes at the stirring speed of 800rpm/min to obtain a second mixed solution;
s3, mixing the film-forming aid and water according to the formula amount, slowly adding the mixture into the second mixed solution, dispersing for 5 minutes at the stirring speed of 600rpm/min, then adding the thickener according to the formula amount, and dispersing for 10 minutes at the stirring speed of 600rpm/min to obtain the agent A;
and step two, uniformly mixing the agent A and the agent B according to the weight ratio to obtain the water-based double-component high-scratch-resistance transparent finish paint.
Example 14
The water-based double-component high-scratch-resistant transparent finish paint consists of an agent A and an agent B in a weight ratio of 100:25, wherein the agent A comprises the following raw materials in parts by weight:
the balance of water;
the agent B is a water-based curing agent.
The waterborne curing agent is a Corsia XP2655 polyisocyanate curing agent, can react with waterborne hydroxy acrylic resin at room temperature, and improves the crosslinking density of a paint film, so that the hardness and the scratch resistance of the paint film are improved.
The water-based hydroxy acrylic resin is a hydroxy acrylic secondary dispersion with the hydroxyl value content of 3.8% and the solid content of 45%, and has the glass transition temperature of 72 ℃, and has the characteristics of high hardness, good scratch resistance and excellent chemical resistance.
The wetting dispersant is water-based polyether modified siloxane with alternate long and short molecular chain segments.
The scratch-resistant wax emulsion is a Pickering chemical BYK539 wax emulsion which is a PTFE type micro-crystalline wax emulsion so as to improve the scratch resistance of a paint film.
Wherein the anti-scratching auxiliary agent is an organic silicon derivative with ultrahigh molecular weight.
Wherein the defoaming agent is a water-based organic silicon defoaming agent or a mineral oil defoaming agent.
Wherein the thickener is an associative polyurethane thickener.
Wherein, the pigment filler is glass powder.
Wherein the film-forming assistant is dipropylene glycol methyl ether or ethylene glycol monobutyl ether.
The embodiment also provides a preparation method of the waterborne double-component high scratch-resistant transparent finish paint, which comprises the following steps:
first step, preparation of agent A
First step, preparation of agent A
S1, mixing the water-based hydroxy acrylic resin and the pigment and filler according to the formula ratio, and dispersing for 12 minutes at a stirring speed of 800rpm/min to obtain a first mixed solution;
s2, sequentially adding the defoaming agent, the scraping-resistant auxiliary agent, the scraping-resistant wax emulsion and the wetting dispersant in the formula ratio into the first mixed solution, and dispersing for 12 minutes at a stirring speed of 600rpm/min to obtain a second mixed solution;
s3, mixing the film-forming aid and water according to the formula amount, slowly adding the mixture into the second mixed solution, dispersing for 6 minutes at a stirring speed of 500rpm/min, then adding the thickener according to the formula amount, and dispersing for 12 minutes at a stirring speed of 500rpm/min to obtain the agent A;
and secondly, uniformly mixing the agent A and the agent B according to the weight ratio to obtain the water-based bi-component high-scratch-resistant transparent finish paint.
Example 15
The water-based double-component high-scratch-resistant transparent finish paint consists of an agent A and an agent B in a weight ratio of 100:25, wherein the agent A comprises the following raw materials in parts by weight:
the balance of water;
the agent B is a water-based curing agent.
The waterborne curing agent is a Corsia XP2655 polyisocyanate curing agent, can react with waterborne hydroxy acrylic resin at room temperature, and improves the crosslinking density of a paint film, so that the hardness and the scratch resistance of the paint film are improved.
The water-based hydroxy acrylic resin is a hydroxy acrylic secondary dispersion with the hydroxyl value content of 3.8% and the solid content of 45%, and has the glass transition temperature of 72 ℃, and has the characteristics of high hardness, good scratch resistance and excellent chemical resistance.
The wetting dispersant is water-based polyether modified siloxane with alternate long and short molecular chain segments.
The scratch-resistant wax emulsion is a Pickering chemical BYK539 wax emulsion which is a PTFE type micro-crystalline wax emulsion so as to improve the scratch resistance of a paint film.
Wherein the anti-scratching auxiliary agent is an organic silicon derivative with ultrahigh molecular weight.
Wherein the defoaming agent is a water-based organic silicon defoaming agent or a mineral oil defoaming agent.
Wherein the thickener is an associative polyurethane thickener.
Wherein, the pigment filler is glass powder.
Wherein the film-forming assistant is dipropylene glycol methyl ether or ethylene glycol monobutyl ether.
The embodiment also provides a preparation method of the waterborne double-component high scratch-resistant transparent finish paint, which comprises the following steps:
first step, preparation of agent A
First step, preparation of agent A
S1, mixing the water-based hydroxy acrylic resin and the pigment and filler according to the formula ratio, and dispersing for 8 minutes at a stirring speed of 1200rpm/min to obtain a first mixed solution;
s2, sequentially adding the defoaming agent, the scraping-resistant auxiliary agent, the scraping-resistant wax emulsion and the wetting dispersant in the formula ratio into the first mixed solution, and dispersing for 8 minutes at a stirring speed of 1000rpm/min to obtain a second mixed solution;
s3, mixing the film-forming aid and water according to the formula amount, slowly adding the mixture into the second mixed solution, dispersing for 4 minutes at the stirring speed of 700rpm/min, then adding the thickener according to the formula amount, and dispersing for 8 minutes at the stirring speed of 700rpm/min to obtain the agent A;
and step two, uniformly mixing the agent A and the agent B according to the weight ratio to obtain the water-based double-component high-scratch-resistance transparent finish paint.
The aqueous two-component topcoats prepared in examples 13-15 were tested for performance under the same conditions and the same criteria as shown in table 5.
TABLE 5
| Example 13 | Example 14 | Example 15 | |
| Adhesion force | Level 0 | Level 0 | Level 0 |
| Film thickness/micron | 33 | 30 | 35 |
| Transparency of | Good effect | Good effect | Good effect |
| Drying Property | In general | In general | In general |
| Resisting 50% alcohol for 1h | No obvious trace | No obvious trace | No obvious trace |
| Water resistance of 24h | No obvious trace | No obvious trace | No obvious trace |
| Scratch resistance | Superior food | Superior food | Superior food |
| Wear resistance | Superior food | Superior food | Superior food |
| Hand feeling | Smooth and slippery | Smooth and slippery | Smooth and slippery |
| Hardness of | H | H | H |
| Resistant to bending | 5mm OK | 5mm OK | 5mm OK |
Referring to the data in table 5, it can be seen that under the condition that the weight ratio of the agent a and the agent B, the glass transition temperature of the aqueous hydroxy acrylic resin, the scratch-resistant wax emulsion and the pigment filler are optimally selected, the aqueous two-component high scratch-resistant transparent finish paint with excellent adhesion, water resistance, alcohol resistance, scratch resistance, wear resistance and hardness and smooth hand feeling can be obtained as long as the raw material ratio and preparation parameters are within the range of the invention.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The water-based double-component high scratch-resistant transparent finishing coat is characterized by consisting of an agent A and an agent B in a weight ratio of 100 (20-35), wherein the agent A comprises the following raw materials in parts by weight:
the agent B is a water-based curing agent.
2. The aqueous two-component high scratch resistant transparent topcoat as claimed in claim 1, characterized in that: the water-based curing agent is a polyisocyanate curing agent.
3. The aqueous two-component high scratch resistant transparent topcoat as claimed in claim 1, characterized in that: the glass transition temperature of the water-based hydroxyl acrylic resin is 20-72 ℃.
4. The aqueous two-component high scratch resistant transparent topcoat as claimed in claim 1, characterized in that: the wetting dispersant is water-based polyether modified siloxane.
5. The aqueous two-component high scratch resistant transparent topcoat as claimed in claim 1, characterized in that: the color filler is matting powder, transparent powder or glass powder.
6. The aqueous two-component high scratch resistant transparent topcoat as claimed in claim 1, characterized in that: the anti-scraping auxiliary agent is an organic silicon derivative with ultrahigh molecular weight, the defoaming agent is a water-based organic silicon defoaming agent or a mineral oil defoaming agent, the thickening agent is an associated polyurethane thickening agent, and the film-forming auxiliary agent is dipropylene glycol methyl ether or ethylene glycol monobutyl ether.
7. The preparation method of the water-based two-component high scratch-resistant transparent finishing paint as claimed in any one of claims 1 to 6, characterized by comprising the following steps:
first step, preparation of agent A
S1, mixing and dispersing the water-based hydroxyl acrylic resin and the pigment and filler according to the formula ratio to obtain a first mixed solution;
s2, sequentially adding the defoaming agent, the scraping-resistant auxiliary agent, the scraping-resistant wax emulsion and the wetting dispersant in the formula ratio into the first mixed solution, and uniformly stirring to obtain a second mixed solution;
s3, mixing the film-forming aid and water according to the formula amount, slowly adding the mixture into the second mixed solution, stirring for a certain time, adding the thickener according to the formula amount, and uniformly stirring to obtain the agent A;
and secondly, uniformly mixing the agent A and the agent B according to the weight ratio to obtain the water-based bi-component high-scratch-resistant transparent finish paint.
8. The preparation method of the aqueous two-component high scratch-resistant transparent finishing paint according to claim 7, characterized in that: in step S1, the dispersion is carried out at a stirring speed of 800-.
9. The preparation method of the aqueous two-component high scratch-resistant transparent finishing paint according to claim 7, characterized in that: in step S2, the dispersion is carried out at a stirring speed of 600-1000rpm/min for 8-12 minutes.
10. The preparation method of the aqueous two-component high scratch-resistant transparent finishing paint according to claim 7, characterized in that: in step S3, the film-forming assistant with the formula amount is slowly added into the second mixed solution after being mixed with water, and dispersed for 4-6 minutes at the stirring speed of 500-700rpm/min, and then the thickener with the formula amount is added, and dispersed for 8-12 minutes at the stirring speed of 500-700rpm/min, thus obtaining the agent A.
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