CN114213949A - Waterborne epoxy modified acrylic acid two-component transparent coating for medals and preparation method thereof - Google Patents
Waterborne epoxy modified acrylic acid two-component transparent coating for medals and preparation method thereof Download PDFInfo
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- CN114213949A CN114213949A CN202111570682.6A CN202111570682A CN114213949A CN 114213949 A CN114213949 A CN 114213949A CN 202111570682 A CN202111570682 A CN 202111570682A CN 114213949 A CN114213949 A CN 114213949A
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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
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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
- C09D5/08—Anti-corrosive paints
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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 relates to a water-based epoxy modified acrylic acid two-component transparent coating for medals, which comprises a component A and a component B, wherein the component A is prepared from the following raw materials: the water-based epoxy modified hydroxyl acrylic resin paint comprises water-based epoxy modified hydroxyl acrylic resin, a cosolvent, a water-based dispersant, matting powder, a defoaming agent, a wetting agent, a pH regulator, a polyurethane thickener and deionized water, wherein the component B is prepared from the following raw materials: when the invention is used, A, B components are mixed uniformly according to a certain proportion, then proper deionized water is added to dilute, and then the mixture is sprayed on the surface of the medal and dried at 80 ℃ for 60 minutes, thus obtaining the complete medal protective coating.
Description
Technical Field
The invention relates to the field of coatings, in particular to a water-based epoxy modified acrylic acid two-component transparent coating for medals and a method thereof.
Background
Large events usually issue various kinds of medals, and some of the medals are made of gold, silver, or copper. The gold is soft and easy to wear; silver is easy to wear and oxidize in air, and the color of the silver turns black; copper is also oxidized in the air to produce blue-green patina. Some large-scale events can produce the phenomenon of paint falling of cash, silver and copper cards, and non-professionals can mistakenly consider the medals to be fake, and the root cause is that the protective coating on the medals falls off. Therefore, the gold, silver and copper medals are required to be kept as new in color and luster for a long time and are not worn, a protective coating must be made on the medals, the protective coating must have good adhesive force, can be firmly attached to unusual metal substrates such as gold, silver and copper, cannot influence the color and luster of the metal materials such as gold, silver and copper, has the performances of water resistance, scratch resistance, salt fog resistance, high and low temperature cycle resistance and the like, and can prevent the problems of abrasion, paint falling, oxidation rusting, color change and the like in the manufacturing, transportation and long-term storage processes of the medals.
The related patents are not found about the protective coatings of gold, silver and copper plates. Manufacturers of medals generally apply conventional industrial paints such as solvent-based two-component acrylic paints. Because special research is not carried out on special materials such as gold, silver and copper, the problems of paint falling, oxidation, corrosion, color change and the like are easy to occur.
Gold cards cannot be rusted, but silver cards and copper cards are easy to be oxidized and rusted, if the protection of the coating is not good, the silver cards are easy to turn black, and the copper cards are easy to be rusted with blue-green.
Technical problem to be solved
In order to solve the problems in the prior art, the invention provides a water-based epoxy modified acrylic two-component transparent coating for medals and a method thereof.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
the waterborne epoxy modified acrylic two-component transparent coating for the medals comprises a component A and a component B, wherein the component A and the component B are 10: 1, mixing;
the component A is prepared from the following raw materials in parts by mass:
the component B is prepared from the following raw materials in parts by mass:
95.0 parts of hydrophilic modified isocyanate curing agent,
5.0 parts of a silane coupling agent.
A preparation method of a water-based epoxy modified acrylic acid two-component transparent coating for medals comprises the following specific steps:
wherein, the preparation process of the component A is as follows:
SA1, adding 80.0-90.0 parts (by mass, the same below) of water-based epoxy modified hydroxy acrylic resin into a container, adding 3.0-5.0 parts of cosolvent under the stirring state, and stirring for 5-10 minutes at 1000 RPM;
SA2, adding 0.5-1.0 part of aqueous dispersant under the stirring state, and stirring for 5-10 minutes at 1000 RPM;
SA3, adding 0.1-0.5 part of matting powder in a stirring state, and stirring at 1500RPM for 15-20 minutes;
SA4, adding 0.1-0.3 part of defoaming agent under the stirring state, and stirring at 1500RPM for 15-20 minutes;
SA5, adding 0.3-0.6 part of wetting agent in a stirring state, and stirring at 1000RPM for 5-10 minutes;
SA6, adding 0.1-0.3 part of pH regulator while stirring, stirring at 1000RPM for 5-10 minutes, and regulating the pH value to 7.5-8.0;
SA7, adding 0.1-0.3 part of polyurethane thickener while stirring, and stirring at 1000RPM for 5-10 minutes;
SA8, adding 4.0-5.0 parts of deionized water under the stirring state, stirring at 500RPM for 3-5 minutes, and adjusting the viscosity of the system to 70-80 KU/25 ℃;
SA9, filtering with 200 mesh filter screen to obtain component A;
wherein, the preparation process of the component B is as follows:
SB1, putting 95.0 parts of hydrophilic modified isocyanate curing agent into a container in a dry environment with the humidity less than or equal to 60%;
SB2, adding 5.0 parts of silane coupling agent under the stirring state, and stirring at 1000RPM for 5-10 minutes;
SB3, filtering with 200 mesh filter screen, sealing and packaging in a narrow-mouth bottle to obtain component B;
when in use, the component A and the component B are mixed according to the proportion of 10: 1, and adding deionized water accounting for 10-20% of the total mass of the component A for dilution.
(III) advantageous effects
The invention has the beneficial effects that: the coating is specially used for coating protection of gold, silver and copper cards, can perfectly present the metal colors of the gold, silver and copper cards, has excellent adhesive force and good hardness, protects the medals from being worn, and ensures that the gold cards are not easily oxidized and corroded due to excellent water resistance and salt spray resistance.
The waterborne epoxy modified acrylic two-component transparent coating provided by the invention comprises A, B two components. The component A mainly comprises waterborne epoxy modified hydroxy acrylic resin, and the component B comprises hydrophilic modified isocyanate curing agent and silane coupling agent. When in use, the A, B components are mixed evenly according to a certain proportion, then a proper amount of deionized water is added for dilution, and then the mixture is sprayed on the surface of the medal and dried at 80 ℃ for 60 minutes, thus obtaining the complete medal protective coating.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the present invention by way of specific embodiments thereof.
A water-based epoxy modified acrylic acid two-component transparent coating for medals comprises a component A and a component B, wherein the component A and the component B are 10: 1, mixing;
the component A is prepared from the following raw materials in parts by mass:
the component B is prepared from the following raw materials in parts by mass:
95.0 parts of hydrophilic modified isocyanate curing agent,
5.0 parts of a silane coupling agent.
A preparation method of a water-based epoxy modified acrylic acid two-component transparent coating for medals comprises the following specific steps:
wherein, the preparation process of the component A is as follows:
SA1, adding 80.0-90.0 parts (by mass, the same below) of water-based epoxy modified hydroxy acrylic resin into a container, adding 3.0-5.0 parts of cosolvent under the stirring state, and stirring for 5-10 minutes at 1000 RPM;
SA2, adding 0.5-1.0 part of aqueous dispersant under the stirring state, and stirring for 5-10 minutes at 1000 RPM;
SA3, adding 0.1-0.5 part of matting powder in a stirring state, and stirring at 1500RPM for 15-20 minutes;
SA4, adding 0.1-0.3 part of defoaming agent under the stirring state, and stirring at 1500RPM for 15-20 minutes;
SA5, adding 0.3-0.6 part of wetting agent in a stirring state, and stirring at 1000RPM for 5-10 minutes;
SA6, adding 0.1-0.3 part of pH regulator while stirring, stirring at 1000RPM for 5-10 minutes, and regulating the pH value to 7.5-8.0;
SA7, adding 0.1-0.3 part of polyurethane thickener while stirring, and stirring at 1000RPM for 5-10 minutes;
SA8, adding 4.0-5.0 parts of deionized water under the stirring state, stirring at 500RPM for 3-5 minutes, and adjusting the viscosity of the system to 70-80 KU/25 ℃;
SA9, filtering with 200 mesh filter screen to obtain component A;
wherein, the preparation process of the component B is as follows:
SB1, putting 95.0 parts of hydrophilic modified isocyanate curing agent into a container in a dry environment with the humidity less than or equal to 60%;
SB2, adding 5.0 parts of silane coupling agent under the stirring state, and stirring at 1000RPM for 5-10 minutes;
SB3, filtering with 200 mesh filter screen, sealing and packaging in a narrow-mouth bottle to obtain component B;
when in use, the component A and the component B are mixed according to the proportion of 10: 1, and adding deionized water accounting for 10-20% of the total mass of the component A for dilution.
The invention adopts a water-based epoxy modified acrylic acid two-component system, is safe and environment-friendly, has low VOC, and the protective coating obtained by the two-component crosslinking reaction is firm and wear-resistant, and can effectively protect gold, silver and copper cards from being scratched and abraded. The invention adopts the waterborne epoxy modified hydroxyl acrylic resin as the main resin, firstly, the existence of epoxy groups can ensure the adhesive force on special materials such as gold, silver and copper, and secondly, the waterborne epoxy modified acrylic resin has good transparency after being mixed and cured with the hydrophilic modified isocyanate curing agent, and can well reduce the metal color of gold, silver and copper cards. If a water-based epoxy two-component system is used singly, although the water-based epoxy two-component system also has good adhesive force, the paint film is whitish and poor in transparency, and the metal colors of gold, silver and copper cards are covered, so that the problem of poor appearance of the medals is caused. The silane coupling agent is added in the component B, and the silane generates a chemical bond with the metal base material after hydrolytic condensation, so that the adhesive force of the silane coupling agent can be further enhanced, particularly the adhesive force in a wet state, and the phenomenon of paint falling is further avoided.
Example 1:
wherein the preparation process of the component A is as follows:
SA1, 90.0 parts (by mass, the same applies hereinafter) of the aqueous epoxy-modified hydroxy acrylic resin was put into a vessel, 3.0 parts of the cosolvent was added while stirring, and the mixture was stirred at 1000RPM for 5 to 10 minutes.
SA2, 0.5 part of aqueous dispersant is added under stirring, and the mixture is stirred at 1000RPM for 5 to 10 minutes.
SA3, adding 0.1 part of matting powder under the stirring state, and stirring at 1500RPM for 15-20 minutes.
SA4, adding 0.1 part of defoaming agent under the stirring state, and stirring at 1500RPM for 15-20 minutes.
SA5, 0.3 part of wetting agent is added under the stirring state, and the mixture is stirred for 5 to 10 minutes at 1000 RPM.
SA6, adding 0.1 part of pH regulator while stirring, stirring at 1000RPM for 5-10 minutes, and adjusting the pH value to 7.5-8.0.
SA7, adding 0.1 part of polyurethane thickener while stirring, and stirring at 1000RPM for 5-10 minutes.
SA8, adding 5.0 parts of deionized water under the stirring state, stirring for 3-5 minutes at 500RPM, and adjusting the viscosity of the system to 70-80 KU/25 ℃.
SA9, filtering with 200 mesh sieve to obtain component A.
The preparation process of the component B is as follows:
SB1, adding 95.0 parts of hydrophilic modified isocyanate curing agent into a container in a dry environment (humidity is less than or equal to 60 percent).
SB2, 5.0 parts of silane coupling agent is added under stirring, and stirring is carried out at 1000RPM for 5-10 minutes.
SB3, filtering with 200 mesh sieve, and sealing and packaging in a small-mouth bottle to obtain component B.
When in use, the component A and the component B are mixed according to the proportion of 10: 1, and adding deionized water accounting for 10-20% of the total mass of the component A for dilution.
Example 2:
wherein the preparation process of the component A is as follows:
SA1, 80.0 parts (by mass, the same applies hereinafter) of the water-based epoxy modified hydroxy acrylic resin is added into a container, 5.0 parts of the cosolvent is added under stirring, and the mixture is stirred for 5 to 10 minutes at 1000 RPM.
SA2, 1.0 part of aqueous dispersant is added under stirring, and the mixture is stirred at 1000RPM for 5 to 10 minutes.
SA3, adding 0.5 part of matting powder under the stirring state, and stirring at 1500RPM for 15-20 minutes.
SA4, adding 0.3 part of defoaming agent under the stirring state, and stirring at 1500RPM for 15-20 minutes.
SA5, 0.6 part of wetting agent is added under the stirring state, and the mixture is stirred for 5 to 10 minutes at 1000 RPM.
SA6, adding 0.3 part of pH regulator while stirring, stirring at 1000RPM for 5-10 minutes, and adjusting the pH value to 7.5-8.0.
SA7, adding 0.3 part of polyurethane thickener while stirring, and stirring at 1000RPM for 5-10 minutes.
SA8, adding 4.0 parts of deionized water under the stirring state, stirring for 3-5 minutes at 500RPM, and adjusting the viscosity of the system to 70-80 KU/25 ℃.
SA9, filtering with 200 mesh sieve to obtain component A.
The preparation process of the component B is as follows:
SB1, adding 95.0 parts of hydrophilic modified isocyanate curing agent into a container in a dry environment (humidity is less than or equal to 60 percent).
SB2, 5.0 parts of silane coupling agent is added under stirring, and stirring is carried out at 1000RPM for 5-10 minutes.
SB3, filtering with 200 mesh sieve, and sealing and packaging in a small-mouth bottle to obtain component B.
When in use, the component A and the component B are mixed according to the proportion of 10: 1, and adding deionized water accounting for 10-20% of the total mass of the component A for dilution.
Example 3:
wherein the preparation process of the component A is as follows:
SA1, 85.0 parts (by mass, the same applies hereinafter) of the water-based epoxy modified hydroxy acrylic resin is added into a container, 4.0 parts of the cosolvent is added under stirring, and the mixture is stirred for 5 to 10 minutes at 1000 RPM.
SA2, 0.75 part of aqueous dispersant is added under stirring, and the mixture is stirred at 1000RPM for 5 to 10 minutes.
SA3, adding 0.3 part of matting powder under the stirring state, and stirring at 1500RPM for 15-20 minutes.
SA4, adding 0.3 part of defoaming agent under the stirring state, and stirring at 1500RPM for 15-20 minutes.
SA5, 0.45 part of wetting agent is added under the stirring state, and the mixture is stirred for 5 to 10 minutes at 1000 RPM.
SA6, adding 0.2 part of pH regulator while stirring, stirring at 1000RPM for 5-10 minutes, and adjusting the pH value to 7.5-8.0.
SA7, adding 0.2 part of polyurethane thickener while stirring, and stirring at 1000RPM for 5-10 minutes.
SA8, adding 4.5 parts of deionized water under the stirring state, stirring for 3-5 minutes at 500RPM, and adjusting the viscosity of the system to 70-80 KU/25 ℃.
SA9, filtering with 200 mesh sieve to obtain component A.
The preparation process of the component B is as follows:
SB1, adding 95.0 parts of hydrophilic modified isocyanate curing agent into a container in a dry environment (humidity is less than or equal to 60 percent).
SB2, 5.0 parts of silane coupling agent is added under stirring, and stirring is carried out at 1000RPM for 5-10 minutes.
SB3, filtering with 200 mesh sieve, and sealing and packaging in a small-mouth bottle to obtain component B.
When in use, the component A and the component B are mixed according to the proportion of 10: 1, and adding deionized water accounting for 10-20% of the total mass of the component A for dilution.
The examples 1-3 were compared with the conventional medal varnish for market, and the specific experimental data are as follows:
from the above table it can be seen that: compared with the conventional solvent type double-component acrylic varnish in the comparative example 1, the conventional solvent type double-component acrylic varnish for medals has the problems of high VOC and poor wet adhesion, and if the medals are subjected to the environments of water immersion, moisture and the like, the phenomenon of paint falling can occur; the aqueous double-component epoxy varnish of the comparative example 2 has the problem of poor transparency of a paint film, and influences the appearance of the medal; comparative example 3 the aqueous two-component acrylic acid also had the problem of poor wet adhesion. Examples 1, 2 and 3 are excellent in terms of environmental protection, appearance, adhesion and the like.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (2)
1. The waterborne epoxy modified acrylic two-component transparent coating for the medals is characterized by comprising a component A and a component B, wherein the component A and the component B are 10: 1, mixing;
the component A is prepared from the following raw materials in parts by mass:
the component B is prepared from the following raw materials in parts by mass:
95.0 parts of hydrophilic modified isocyanate curing agent,
5.0 parts of a silane coupling agent.
2. The preparation method of the aqueous epoxy modified acrylic two-component clear coating for the medal as claimed in claim 1, which is characterized by comprising the following steps:
wherein, the preparation process of the component A is as follows:
SA1, adding 80.0-90.0 parts (by mass, the same below) of water-based epoxy modified hydroxy acrylic resin into a container, adding 3.0-5.0 parts of cosolvent under the stirring state, and stirring for 5-10 minutes at 1000 RPM;
SA2, adding 0.5-1.0 part of aqueous dispersant under the stirring state, and stirring for 5-10 minutes at 1000 RPM;
SA3, adding 0.1-0.5 part of matting powder in a stirring state, and stirring at 1500RPM for 15-20 minutes;
SA4, adding 0.1-0.3 part of defoaming agent under the stirring state, and stirring at 1500RPM for 15-20 minutes;
SA5, adding 0.3-0.6 part of wetting agent in a stirring state, and stirring at 1000RPM for 5-10 minutes;
SA6, adding 0.1-0.3 part of pH regulator while stirring, stirring at 1000RPM for 5-10 minutes, and regulating the pH value to 7.5-8.0;
SA7, adding 0.1-0.3 part of polyurethane thickener while stirring, and stirring at 1000RPM for 5-10 minutes;
SA8, adding 4.0-5.0 parts of deionized water under the stirring state, stirring at 500RPM for 3-5 minutes, and adjusting the viscosity of the system to 70-80 KU/25 ℃;
SA9, filtering with 200 mesh filter screen to obtain component A;
wherein, the preparation process of the component B is as follows:
SB1, putting 95.0 parts of hydrophilic modified isocyanate curing agent into a container in a dry environment with the humidity less than or equal to 60%;
SB2, adding 5.0 parts of silane coupling agent under the stirring state, and stirring at 1000RPM for 5-10 minutes;
SB3, filtering with 200 mesh filter screen, sealing and packaging in a narrow-mouth bottle to obtain component B;
when in use, the component A and the component B are mixed according to the proportion of 10: 1, and adding deionized water accounting for 10-20% of the total mass of the component A for dilution.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111570682.6A CN114213949A (en) | 2021-12-21 | 2021-12-21 | Waterborne epoxy modified acrylic acid two-component transparent coating for medals and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111570682.6A CN114213949A (en) | 2021-12-21 | 2021-12-21 | Waterborne epoxy modified acrylic acid two-component transparent coating for medals and preparation method thereof |
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| CN103102792A (en) * | 2013-02-26 | 2013-05-15 | 富思特新材料科技发展股份有限公司 | Water-based bicomponent polyurethane matte coating and preparation method thereof |
| CN105295597A (en) * | 2015-07-02 | 2016-02-03 | 江苏足迹涂料有限公司 | Water-borne automobile polyurethane varnish and preparation method thereof |
| CN108285731A (en) * | 2018-01-12 | 2018-07-17 | 成都巴德富科技有限公司 | A kind of resistant to boiling water high adhesion force aqueous double-component finishing varnish and preparation method thereof |
| CN110511388A (en) * | 2019-08-23 | 2019-11-29 | 湖北双键精细化工有限公司 | A kind of modified hydroxyl acrylic emulsion and preparation method thereof for aqueous coatings for tin plate printing |
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2021
- 2021-12-21 CN CN202111570682.6A patent/CN114213949A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102020917A (en) * | 2010-11-18 | 2011-04-20 | 青岛德鑫汽车涂料有限公司 | Water-based two-component acrylic acid polyurethane automobile paint and preparation method thereof |
| CN103102792A (en) * | 2013-02-26 | 2013-05-15 | 富思特新材料科技发展股份有限公司 | Water-based bicomponent polyurethane matte coating and preparation method thereof |
| CN105295597A (en) * | 2015-07-02 | 2016-02-03 | 江苏足迹涂料有限公司 | Water-borne automobile polyurethane varnish and preparation method thereof |
| CN108285731A (en) * | 2018-01-12 | 2018-07-17 | 成都巴德富科技有限公司 | A kind of resistant to boiling water high adhesion force aqueous double-component finishing varnish and preparation method thereof |
| CN110511388A (en) * | 2019-08-23 | 2019-11-29 | 湖北双键精细化工有限公司 | A kind of modified hydroxyl acrylic emulsion and preparation method thereof for aqueous coatings for tin plate printing |
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