CN110698960A - 2K varnish for automobile and construction method thereof - Google Patents
2K varnish for automobile and construction method thereof Download PDFInfo
- Publication number
- CN110698960A CN110698960A CN201911106907.5A CN201911106907A CN110698960A CN 110698960 A CN110698960 A CN 110698960A CN 201911106907 A CN201911106907 A CN 201911106907A CN 110698960 A CN110698960 A CN 110698960A
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- China
- Prior art keywords
- aspartate
- polyurea
- varnish
- curing
- agent
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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
- C09D175/02—Polyureas
-
- 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
-
- 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
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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 2K varnish for automobiles and a construction method thereof, wherein the main agent in the formula contains an aspartate polyurea mixture, the aspartate polyurea mixture comprises an aspartate polyurea A, an aspartate polyurea B and an aspartate polyurea C with the structure of a general formula I,
Description
Technical Field
The invention relates to 2K varnish for an automobile and a construction method thereof.
Background
In recent years, the automobile keeping amount of China rises year by year, and great convenience is brought to people for traveling. However, from the economical and environmental aspects, there is a need to reduce the VOC emission during the coating process in automobile manufacturing, maximally reduce the VOC emission, improve the air quality, and improve the national living environment. Along with the establishment of environmental protection regulations in China, the water-based high-curing coating for automobile industry coating is widely applied in recent years, the VOC emission in the coating link is effectively controlled, but the VOC emission in the use process of automobiles is reduced from the coating perspective, so that the low-temperature fast-curing ultralow-VOC automobile 2K varnish is introduced for improvement on the basis of the water-based intermediate coat, the water-based base coat and the high-curing varnish used in domestic host factories, the VOC in the high-curing varnish construction is about 420g/L, and the VOC in the improved construction can be reduced to 50 g/L.
Disclosure of Invention
The invention aims to provide a low-temperature fast-curing ultralow-VOC (volatile organic compound) automobile 2K varnish and a construction method thereof.
In order to achieve the aim, the invention provides 2K varnish for automobiles, which comprises a main agent and a curing agent, wherein the main agent contains an aspartate polyurea mixture, the aspartate polyurea mixture comprises an aspartate polyurea A, an aspartate polyurea B and an aspartate polyurea C with the structure of the general formula I,
wherein the content of the first and second substances,
r in the aspartate polyurea A is 4, 4 '-methylene bis (2, 2' -dimethylcyclohexylene),
r in the aspartate polyurea B is 4, 4' -methylene dicyclohexyl,
r in the aspartate polyurea C is 2-methylpentylene,
aspartate polyurea a: aspartate polyurea B: the weight ratio of the aspartate polyurea C is 1: 1: 6.
further, the main agent consists of 56 to 72 weight parts of aspartate polyurea mixture, 2 to 3 weight parts of butyl acetate, 1 to 3 weight parts of flatting agent, 0.5 to 2 weight parts of defoaming agent, 0.5 to 1.5 weight parts of light stabilizer and 1 to 3 weight parts of ultraviolet absorber,
the curing agent consists of 55.5 to 76.8 weight portions of isocyanate.
Further, the leveling agent is selected from any one of BYK-333, BYK-331 or TEGO-370 which are commercially available.
Further, the defoaming agent is selected from any one of commercially available TEGO-810, TEGO-900 or TEGO-840.
Further, the light stabilizer is selected from any one of commercially available BASF 292, BASF400 or BASF B97.
Further, the ultraviolet absorber is selected from any one of the commercially available BASF1130, BASF 928 or BASF 384.
Further, the isocyanate is selected from any one of commercially available scientific wound 3900 or scientific wound 3300.
The invention also comprises a construction method of the 2K varnish for the automobile, which comprises the following steps:
the main agent and the curing agent are as follows: mixing the curing agents according to the weight ratio of 1.1:1, fully and uniformly stirring, spraying, and curing at the room temperature of 25 ℃ for 6 hours, wherein the construction VOC is less than or equal to 50 g/L.
The 2K varnish for the automobile only needs 6 hours for curing at room temperature of 25 ℃, and the VOC (volatile organic compound) during construction is less than or equal to 50g/L, which is far lower than the VOC of the conventional high-solid varnish construction, so that the 2K varnish is more environment-friendly.
Detailed Description
The principles and features of this invention are described below in conjunction with examples which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
Example 1
The automobile 2K varnish formula comprises:
preparing an aspartic ester-polyurea mixture and preparing the polyurea mixture,
example 2
The automobile 2K varnish formula comprises:
a main agent:
example 3
The automobile 2K varnish formula comprises:
in the above examples, the aspartate polyurea blend used was a blend of three aspartate polyureas having the structure of formula I:
r in the aspartate polyurea A is 4, 4 '-methylene bis (2, 2' -dimethylcyclohexylene),
r in the aspartate polyurea B is 4, 4' -methylene dicyclohexyl,
r in the aspartate polyurea C is 2-methylpentylene,
aspartate polyurea a: aspartate polyurea B: the weight ratio of the aspartate polyurea C is 1: 1: 6 to obtain an aspartic ester polyurea mixture.
The main agent is obtained by fully mixing the aspartic ester polyurea mixture, butyl acetate, BYK-333, TEGO-810, BASF 292 and BASF1130 according to the dosage of each formula.
During construction, the main agent and the curing agent are as follows: mixing the curing agents according to the weight ratio of 1.1:1, fully and uniformly stirring, spraying, and curing at the room temperature of 25 ℃ for 6 hours, wherein the construction VOC is less than or equal to 50 g/L.
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, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The 2K varnish for the automobile comprises a main agent and a curing agent, and is characterized in that the main agent contains an aspartate polyurea mixture, the aspartate polyurea mixture comprises an aspartate polyurea A, an aspartate polyurea B and an aspartate polyurea C with the structure of a general formula I,
wherein the content of the first and second substances,
r in the aspartate polyurea A is 4, 4 '-methylene bis (2, 2' -dimethylcyclohexylene),
r in the aspartate polyurea B is 4, 4' -methylene dicyclohexyl,
r in the aspartate polyurea C is 2-methylpentylene,
aspartate polyurea a: aspartate polyurea B: the weight ratio of the aspartate polyurea C is 1: 1: 6.
2. the automotive 2K varnish according to claim 1, wherein:
the main agent consists of 56 to 72 weight parts of aspartate polyurea mixture, 2 to 3 weight parts of butyl acetate, 1 to 3 weight parts of flatting agent, 0.5 to 2 weight parts of defoaming agent, 0.5 to 1.5 weight parts of light stabilizer and 1 to 3 weight parts of ultraviolet absorber,
the curing agent consists of 55.5 to 76.8 weight portions of isocyanate.
3. The automotive 2K varnish according to claim 1, wherein the leveling agent is selected from any one of the commercially available BYK-333, BYK-331 or TEGO-370.
4. The automotive 2K varnish according to claim 1, wherein the defoamer is selected from any one of commercially available TEGO-810, TEGO-900 or TEGO-840.
5. The automotive 2K varnish according to claim 1, wherein the light stabilizer is selected from any one of the commercially available BASF 292, BASF400 or BASF B97.
6. The automotive 2K varnish according to claim 1, wherein the uv absorber is selected from any one of the commercially available BASF1130, BASF 928 or BASF 384.
7. The automotive 2K varnish according to claim 1, wherein the isocyanate is selected from any one of commercially available scientific wound 3900 or scientific wound 3300.
8. A construction method of the 2K varnish for the automobile as claimed in any one of claims 1 to 7, characterized in that the main agent and the curing agent are as follows: mixing the curing agents according to the weight ratio of 1.1:1, fully and uniformly stirring, spraying, and curing at the room temperature of 25 ℃ for 6 hours, wherein the construction VOC is less than or equal to 50 g/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911106907.5A CN110698960A (en) | 2019-11-13 | 2019-11-13 | 2K varnish for automobile and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911106907.5A CN110698960A (en) | 2019-11-13 | 2019-11-13 | 2K varnish for automobile and construction method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110698960A true CN110698960A (en) | 2020-01-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911106907.5A Pending CN110698960A (en) | 2019-11-13 | 2019-11-13 | 2K varnish for automobile and construction method thereof |
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| Country | Link |
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| CN (1) | CN110698960A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111253857A (en) * | 2020-03-27 | 2020-06-09 | 河南东澳化工有限公司 | High-solid-content low-VOC (volatile organic compound) super-curing finishing varnish and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101412885A (en) * | 2008-12-11 | 2009-04-22 | 株洲飞鹿涂料有限责任公司 | Coating and preparation thereof |
| US20100311890A1 (en) * | 2009-06-05 | 2010-12-09 | Ppg Industries Ohio, Inc. | Curable compositions that form a low modulus polyurea |
| CN103773206A (en) * | 2013-12-12 | 2014-05-07 | 江苏普兰纳涂料有限公司 | Wind power blade repairing quick-drying finishing coat |
-
2019
- 2019-11-13 CN CN201911106907.5A patent/CN110698960A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101412885A (en) * | 2008-12-11 | 2009-04-22 | 株洲飞鹿涂料有限责任公司 | Coating and preparation thereof |
| US20100311890A1 (en) * | 2009-06-05 | 2010-12-09 | Ppg Industries Ohio, Inc. | Curable compositions that form a low modulus polyurea |
| CN103773206A (en) * | 2013-12-12 | 2014-05-07 | 江苏普兰纳涂料有限公司 | Wind power blade repairing quick-drying finishing coat |
Non-Patent Citations (2)
| Title |
|---|
| 张余英: "超长寿命聚天门冬氨酸酯重防腐涂料的研制", 《中国涂料》 * |
| 黄微波等: "喷涂聚脲技术领域的新进展-聚天门冬氨酸酯聚脲", 《中国涂料》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111253857A (en) * | 2020-03-27 | 2020-06-09 | 河南东澳化工有限公司 | High-solid-content low-VOC (volatile organic compound) super-curing finishing varnish and preparation method thereof |
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Application publication date: 20200117 |