CN110628304A - High-temperature-resistant amino-free baking varnish and preparation method thereof - Google Patents
High-temperature-resistant amino-free baking varnish and preparation method thereof Download PDFInfo
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- CN110628304A CN110628304A CN201911080146.0A CN201911080146A CN110628304A CN 110628304 A CN110628304 A CN 110628304A CN 201911080146 A CN201911080146 A CN 201911080146A CN 110628304 A CN110628304 A CN 110628304A
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- Prior art keywords
- temperature
- resistant amino
- free baking
- baking varnish
- amino
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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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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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
- C09D5/18—Fireproof paints including high temperature resistant 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
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0806—Silver
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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)
- Application Of Or Painting With Fluid Materials (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to the technical field of coatings, and particularly discloses a high-temperature-resistant amino-free baking varnish. The high-temperature-resistant amino-free baking varnish comprises the following components in percentage by mass: 90-93% of epoxy resin dispersoid, 3-5% of silver powder, 0.3-0.5% of wetting agent, 0.3-0.5% of thickening agent and the balance of environment-friendly solvent. The high-temperature-resistant amino-free baking varnish overcomes the defects of complex manufacturing process, high raw material cost, easy discoloration, softening and easy sagging of the traditional high-temperature-resistant baking varnish.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to high-temperature-resistant amino-free baking varnish and a preparation method thereof.
Background
At present, most of coatings used by diesel engines mainly use solvent-based industrial coatings, and with increasing importance on environment and health, water-based coatings are widely applied, and the use of environment-friendly water-based coatings to replace solvent-based coatings is becoming a trend, but the water-based industrial coatings are one of the key development directions of environment-friendly coatings, the use performance of the paint has certain defects, and the paint cannot meet the high use requirement of special base materials, for example, the existing water-based amino baking paint suitable for the high temperature resistance requirement of an engine has the defects of complex manufacturing process, high use cost of raw materials, easy color change and softening during high-temperature baking, easy sagging and the like, therefore, the development of the high-performance industrial water paint which has the advantages of simple preparation method, low cost, high-temperature baking resistance, high hardness, difficult color change, sagging resistance and good appearance has great significance.
Disclosure of Invention
Aiming at the problems that the existing industrial water paint used for special base materials and having high performance requirements still has complex manufacturing process, high use cost of raw materials, easy discoloration, softening and easy sagging during high-temperature baking, the invention provides the high-temperature-resistant amino-free baking paint and the preparation method thereof.
In order to achieve the purpose of the invention, the embodiment of the invention adopts the following technical scheme:
the high-temperature-resistant amino-free baking varnish comprises the following components in percentage by mass:
90-93% of epoxy resin dispersoid, 3-5% of silver powder, 0.3-0.5% of wetting agent, 0.3-0.5% of thickening agent and the balance of environment-friendly solvent;
the epoxy resin dispersion is EPICLON H-502-42W.
Compared with the prior art, the high-temperature-resistant amino-free baking varnish provided by the invention overcomes the defects of complex manufacturing process, high raw material cost, easy color change, softening and easy sagging in high-temperature baking of the traditional high-temperature-resistant baking varnish.
The high-temperature resistant baking varnish is characterized in that amino resin is required to be added to improve the high-temperature resistance of the baking varnish, the amino resin contains a certain amount of carboxyl and hydroxyl, the content of the carboxyl and the content of the hydroxyl are different, the requirements on the acid-base property and the viscosity index of the coating are also different, and the performance of a film forming substance used in the coating in a matching way is also affected differently, so that a large amount of auxiliary agents are required to be added to the traditional high-temperature resistant baking varnish, the using amount of each auxiliary agent is strictly controlled, the stability of the performance of a paint film is ensured, the preparation process and the types of raw materials are complex, the preparation cost is high, the high-temperature resistant baking varnish added with the amino resin is easy to turn yellow after being baked at high temperature, and; the high-temperature-resistant baking finish takes the epoxy resin dispersoid EPICLON H-502-42W as a film-forming substance, has large molecular weight, low solid content and high drying speed, has large volume change in the drying process, can effectively arrange silver powder, is simple to manufacture without adding assistants such as silver powder orientation agent, and the epoxy resin dispersoid is self-provided with ether bonds, can break the ether bonds during high-temperature baking and rearrange the ether bonds, so that the epoxy resin dispersoid can still resist high-temperature baking and ensure good hardness and glossiness after being matched with the silver powder without adding amino resin, and the appearance attractiveness of a paint film is ensured.
Preferably, the silver powder has a particle size of 3-10 μm, and is FLU1 from a broad-source symplectic collection.
Preferably, the wetting agent is a polyether modified polydimethylsiloxane solution, and BYK-346 of Bick Germany can be selected.
Preferably, the thickener is a nonionic associative thickener.
Preferably, the nonionic associative thickener is a hydrophobic modified polyurethane, and RM-12W of Rohm and Haas can be selected.
Preferably, the environment-friendly solvent is propylene glycol monobutyl ether.
The propylene glycol monobutyl ether can effectively inhibit the oil surface and the whitening phenomenon of the cured surface of the paint film, so that the coating has higher gloss.
The invention also provides a preparation method of the high-temperature-resistant amino-free baking varnish. The preparation method at least comprises the following steps:
a. pouring silver powder into an environment-friendly solvent, and soaking for 15-20min to obtain a mixture;
b. and pouring the epoxy resin dispersoid into the mixture, uniformly stirring, then adding the wetting agent and the thickening agent, and uniformly mixing to obtain the high-temperature-resistant amino-free baking varnish.
Compared with the prior art, the preparation method of the high-temperature-resistant amino-free baking varnish provided by the invention is simple, the equipment requirement is low, and the preparation cost of the high-temperature-resistant baking varnish is reduced.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The high-temperature-resistant amino-free baking varnish comprises the following components in percentage by mass:
| group of | Example 1 | Example 2 | Example 3 |
| Epoxy resin dispersion | 90％ | 92％ | 93％ |
| Silver powder | 3％ | 4％ | 5％ |
| Polyether modified polydimethylsiloxane solution | 0.3％ | 0.4％ | 0.5％ |
| Hydrophobically modified polyurethanes | 0.3％ | 0.4％ | 0.5％ |
| Propylene glycol monobutyl ether | 6.4％ | 3.2％ | 1％ |
Wherein the epoxy resin dispersoid is EPICLON H-502-42W of Japanese Di-Everson; silver powder is FLU1 with a broad source of sinenses; the polyether modified polydimethylsiloxane solution is BYK-346 of German Bike; the hydrophobically modified polyurethane is RM-12W from Rohm and Haas.
The preparation method of the high-temperature-resistant amino-free baking varnish comprises the following steps:
a. pouring the silver powder into propylene glycol monobutyl ether, and soaking for 18min to obtain a mixture;
b. and pouring the epoxy resin dispersoid into the mixture, uniformly stirring, then adding the polyether modified polydimethylsiloxane solution and the hydrophobic modified polyurethane, and uniformly mixing to obtain the high-temperature-resistant amino-free baking varnish.
Comparative example 1
The epoxy resin dispersion of example 1 was replaced with an equal amount of AB-EP-20(W60) aqueous epoxy resin emulsion, and the other components and preparation were the same as in example 1, to give an amino-free stoving varnish.
The baking varnishes obtained in examples 1 to 3 and comparative example 1 were examined for their performance properties, the results of which are shown in the following table:
the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. The high-temperature-resistant amino-free baking varnish is characterized in that: the composite material comprises the following components in percentage by mass:
90-93% of epoxy resin dispersoid, 3-5% of silver powder, 0.3-0.5% of wetting agent, 0.3-0.5% of thickening agent and the balance of environment-friendly solvent;
the epoxy resin dispersion is EPICLON H-502-42W.
2. The high temperature resistant amino-free baking finish of claim 1, wherein: the particle size of the silver powder is 3-10 μm.
3. The high temperature resistant amino-free baking finish of claim 1, wherein: the wetting agent is polyether modified polydimethylsiloxane solution.
4. The high temperature resistant amino-free baking finish of claim 1, wherein: the thickening agent is a nonionic associative thickening agent.
5. The high temperature resistant amino-free baking finish of claim 4, wherein: the nonionic associative thickener is hydrophobic modified polyurethane.
6. The high temperature resistant amino-free baking finish of claim 1, wherein: the environment-friendly solvent is propylene glycol monobutyl ether.
7. The method for preparing the high-temperature-resistant amino-free baking varnish according to any one of claims 1 to 6, wherein the baking varnish comprises the following components in percentage by weight: the method comprises the following steps:
a. pouring silver powder into an environment-friendly solvent, uniformly stirring, and soaking for 15-20min to obtain a mixture;
b. and pouring the epoxy resin dispersoid into the mixture, uniformly stirring, then adding the wetting agent and the thickening agent, and uniformly mixing to obtain the high-temperature-resistant amino-free baking varnish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911080146.0A CN110628304A (en) | 2019-11-06 | 2019-11-06 | High-temperature-resistant amino-free baking varnish and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911080146.0A CN110628304A (en) | 2019-11-06 | 2019-11-06 | High-temperature-resistant amino-free baking varnish and preparation method thereof |
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| CN110628304A true CN110628304A (en) | 2019-12-31 |
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| CN201911080146.0A Pending CN110628304A (en) | 2019-11-06 | 2019-11-06 | High-temperature-resistant amino-free baking varnish and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112375443A (en) * | 2020-11-16 | 2021-02-19 | 北京红狮科技发展有限公司 | Water-based aluminum powder baking paint and preparation method thereof |
-
2019
- 2019-11-06 CN CN201911080146.0A patent/CN110628304A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112375443A (en) * | 2020-11-16 | 2021-02-19 | 北京红狮科技发展有限公司 | Water-based aluminum powder baking paint and preparation method thereof |
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Application publication date: 20191231 |
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| WD01 | Invention patent application deemed withdrawn after publication |