CN113773711A - High-hardness low-VOC (volatile organic compound) automobile varnish suitable for low-temperature use - Google Patents
High-hardness low-VOC (volatile organic compound) automobile varnish suitable for low-temperature use Download PDFInfo
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- CN113773711A CN113773711A CN202111137544.9A CN202111137544A CN113773711A CN 113773711 A CN113773711 A CN 113773711A CN 202111137544 A CN202111137544 A CN 202111137544A CN 113773711 A CN113773711 A CN 113773711A
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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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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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
- C09D7/20—Diluents or solvents
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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
- C09D7/63—Additives non-macromolecular organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- Chemical & Material Sciences (AREA)
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
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Abstract
The invention belongs to the field of coatings, and particularly relates to a high-hardness low-VOC (volatile organic compound) automobile varnish suitable for low-temperature use, which comprises a main paint component and a curing agent component; the main paint comprises the following components in parts by weight: 1339-s-8060-65 parts of acrylic resin; e90116-23 parts of Yingchuangdegussa organic silicon polyester resin; CAB 21001-1.5 shares; 0.6 part of CAB 553-0.40.4; 3-5 parts of methyl n-amyl ketone; 0.02-0.05 part of organotin drier DBTDL; 4-8 parts of a diluent. The varnish can be constructed in a low-temperature environment, has good paint hardness, has the characteristics of VOC content lower than 400g/L and solid content higher than 70%, and is far lower than the national environmental protection standard of vehicle varnish.
Description
Technical Field
The invention relates to the field of coatings, in particular to high-hardness low-VOC automobile varnish suitable for low-temperature use.
Background
Acrylic resin 1339-s-80 is produced by Yangxing chemical industry, has the solid content of 80 percent, has the characteristics of low viscosity and high solid content, and is a high-quality raw material for producing low VOC varnish coating.
CN201010118044.6 discloses an acrylic-amino type finishing varnish composition, which comprises (a)20-48 parts by weight of high-solid thermosetting hydroxy acrylic resin, wherein the hydroxyl value of the high-solid thermosetting hydroxy acrylic resin is between 120 and 160mgKOH/g, and the high-solid means that the solid is more than or equal to 70 percent by weight; (b)20-30 parts by weight of n-butyl alcohol etherified melamine resin; (c)10-30 parts by weight of diurea compound modified acrylic resin, (d)1-10 parts by weight of 3, 5-Dimethylpyrazole (DMP) blocked aliphatic polyisocyanate resin; (e)0.2-1.0 parts by weight of a leveling agent; the flatting agent is a polyester modified polydimethylsiloxane solution; (f) an acceptable amount of a clearcoat adjuvant.
CN201710337408.1 discloses an acrylic acid-polyurethane type overprint varnish composition, which comprises the following components in parts by weight: the component A comprises the following components in parts by weight: 20-40 parts of high-solid thermosetting hydroxy acrylic resin, 5-15 parts of polyester resin, 10-20 parts of cross-linking agent, 10-30 parts of diurea compound modified acrylic resin, 1.61-5.7 parts of varnish auxiliary agent and 5-30 parts of first diluent; the component B comprises the following components in parts by weight: 50-80 parts of isocyanate resin and 20-50 parts of second diluent; the mass ratio of the component A to the component B is 100 (28-32).
CN201210312187.X discloses an automotive finish varnish, a preparation method and a use method thereof, wherein the automotive finish varnish is composed of the following components in parts by weight: 60-70% of hydroxyl acrylic resin, 5-10% of polyester resin, 0.8-1.2% of acrylic flatting agent, 0.3-0.6% of polyether siloxane copolymer, 0.03-0.08% of catalyst T-12 (dibutyltin dilaurate, the same below), 7-20% of butyl ester, 9-20% of xylene and 2.12-8.87% of PMA (propylene glycol methyl ether acetate, the same below).
It can be seen that the use of a combination of high solids acrylic and polyester resins to prepare varnishes is a trending option in the art. It has the advantages of high solid content, high light and high saturation.
However, the hardness and low-temperature workability of the existing varnish cannot be unified, generally speaking, the glass transition temperature is high, the hardness is high, but the minimum construction temperature is required to be high, and vice versa.
However, the prior art has the following problems: how to develop a high-hardness low-VOC automotive varnish suitable for low-temperature use.
Disclosure of Invention
The invention aims to provide a high-hardness low-VOC automobile varnish suitable for low-temperature use, which can be constructed in a low-temperature environment, has better paint surface hardness, has the characteristics of VOC content lower than 400g/L and solid content higher than 70%, and is far lower than the national environmental protection standard of automobile varnish.
Unless otherwise specified, the percentages and parts in the present invention are in weight percent.
In order to achieve the purpose, the invention provides the following technical scheme:
a high-hardness low-VOC automotive varnish suitable for low-temperature use comprises a main paint component and a curing agent component;
the main paint comprises the following components in parts by weight:
1339-s-8060-65 parts of acrylic resin;
e90116-23 parts of Yingchuangdegussa organic silicon polyester resin;
CAB 21001-1.5 shares;
0.6 part of CAB 553-0.40.4;
3-5 parts of methyl n-amyl ketone;
0.02-0.05 part of organotin drier DBTDL;
4-8 parts of a diluent;
the curing agent comprises the following components in parts by weight:
40-45 parts of N3390 curing agent;
5-10 parts of solvent and dehydrating agent;
the ratio of the main paint component to the curing agent component is 1.8-2.2: 1.
The solid content of the acrylic resin 1339-s-80 reaches 80 percent, the solid content of the silicone polyester resin E901 of Woodbis Wiegmann reaches 90 percent, and the acrylic resin 1339-s-80 and the silicone polyester resin E901 of Woodbis have the characteristic of low viscosity, which is the basis for realizing the purposes of high solid content and low VOC of the invention.
The CAB2100 has the characteristics of improving the drying speed and reducing VOC;
CAB553-0.4 has excellent compatibility and high hydroxyl content, can improve higher crosslinking density, can improve the glass transition temperature of a system by being used alone, and can improve the construction condition under low temperature conditions while improving the glass transition temperature due to low viscosity and high glass transition temperature by being matched with CAB2100, so that the CAB553-0.4 can have higher drying speed, improve the film forming speed and keep the film hardness under the low temperature conditions. Both of these are important conditions for maintaining the hardness of the film layer at low temperatures in the presence of the host resin.
Methyl n-amyl ketone is a special ketone solvent, has high dissolving power and low density, effectively improves the construction convenience under the conditions of high solid content and low viscosity, and has lower VOC emission compared with other solvents.
The solid content of the N3390 curing agent reaches more than 90 percent, and the N3390 curing agent is an HDI curing agent with high solid content and low viscosity.
In the above-mentioned high-hardness low-VOC automobile varnish suitable for low-temperature use, the main paint component further includes:
2920.1-0.3 part of light stabilizer;
11300.2-0.4 part of ultraviolet absorber;
defoaming agent BYK 1410.06-0.1 part;
0.3-0.6 part of leveling agent.
In the above-mentioned high hardness low VOC automobile varnish suitable for low temperature use, one or more combinations of the leveling agents EFKA 3600, TEgo450, TEgo Flow 300.
In the above-mentioned high-hardness low-VOC automotive varnish suitable for low-temperature use, the dehydrating agent is a combination OF an OF dehydrating agent and a T1 dehydrating agent; the weight ratio OF the OF dehydrating agent to the T1 dehydrating agent is 1-2: 1-2.
In the high-hardness low-VOC automotive varnish suitable for low-temperature use, the dehydrating agent is 0.1-0.2 part; the solvent is a combination of butyl acetate and xylene, and the solvent accounts for 5-7 parts.
In the above-mentioned high-hardness low-VOC automobile varnish suitable for low-temperature use, the diluent is a combination of butyl acetate and xylene.
Compared with the prior art, the invention has the beneficial effects that:
in the invention, the solid content of the acrylic resin 1339-s-80 reaches 80 percent, the solid content of the silicone polyester resin E901 of Wignenggusai reaches 90 percent, and the acrylic resin 1339-s-80 and the silicone polyester resin E901 of Wignenggusai have the characteristic of low viscosity at the same time, which is the basis for realizing the purposes of high solid content and low VOC of the invention.
The CAB2100 has the characteristics of improving the drying speed and reducing VOC;
CAB553-0.4 has excellent compatibility and high hydroxyl content, can improve higher crosslinking density, has low viscosity and high glass transition temperature, can be matched with CAB2100, improves the construction condition under low temperature while improving the glass transition temperature, and ensures that the CAB553-0.4 has higher drying speed, improves the film forming speed and keeps the film hardness under the low temperature. Both of these are important conditions for maintaining the hardness of the film layer at low temperatures in the presence of the host resin.
Methyl n-amyl ketone is a special ketone solvent, has high dissolving power and low density, effectively improves the construction convenience under the conditions of high solid content and low viscosity, and has lower VOC emission compared with other solvents.
The solid content of the N3390 curing agent reaches more than 90 percent, and the N3390 curing agent is an HDI curing agent with high solid content and low viscosity.
By combining the formula optimization, the operability of low-temperature construction is ensured on the basis of the product characteristics of high solid content and low VOC, and meanwhile, a paint film has better hardness.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A high-hardness low-VOC automotive varnish suitable for low-temperature use comprises a main paint component and a curing agent component; the ratio of the main paint component to the curing agent component is about 2: 1.
The main paint comprises the following components in parts by weight:
1339-s-8063 parts of acrylic resin;
e90120 parts of Yingchuangdegussa organic silicon polyester resin;
4.5 portions of CAB2100 (dissolved in an organic solvent, the solid content is controlled to be about 30 percent);
553-0.40.5 parts of CAB;
4 parts of methyl-n-amyl ketone;
0.04 part of organotin drier DBTDL;
3 parts of butyl acetate;
2 parts of dimethylbenzene;
1 part of propylene glycol methyl ether acetate
2920.2 parts of light stabilizer;
11300.3 parts of ultraviolet absorber;
0.4 part of leveling agent (EFKA 3600: TEgo 450: TEgo Flow 300 ═ 1:5: 2);
and defoaming agent BYK 1410.08 parts.
The curing agent comprises the following components in parts by weight:
42 parts of N3390 curing agent;
3.5 parts of butyl acetate;
3.5 parts of dimethylbenzene;
0.15 parts OF OF dehydrating agent and T1 dehydrating agent (1: 1);
the ratio of the main paint component to the curing agent component is 1.8-2.2: 1.
The main paint component and the curing agent component are mixed for use in the construction process to form the varnish paint film.
Example 2
The same as example 1, except for the differences shown in Table 1 below.
Table 1 formula table
| Main paint component | Dosage of | Curing agent component | Dosage of |
| Acrylic resin 1339-s-80 | 65 | N3390 curing agent | 45 |
| Silicone polyester resin E901 | 17 | Acetic acid butyl ester | 2.5 |
| CAB2100 (solid content 0.3) | 5 | Xylene | 2 |
| CAB553-0.4 | 0.6 | Dehydrating agent | 0.1 |
| Methyl n-amyl ketone | 3 | ||
| Organotin drier DBTDL | 0.03 | ||
| Acetic acid butyl ester | 4 | ||
| Xylene | 2 | ||
| Propylene glycol methyl ether acetate | 1.5 | ||
| Light stabilizer 292 | 0.3 | ||
| Ultraviolet light absorber 1130 | 0.2 | ||
| Leveling agent | 0.6 | ||
| Defoaming agent BYK141 | 0.1 | ||
| Total of | 99.33 | 49.6 |
Example 3
The same as example 1, except for the differences shown in Table 2 below.
Table 2 formula table
Example 4
The same as example 1, except for the differences shown in Table 3 below.
Table 3 formula table
Comparative example 1
This comparative example, generally as example 1, was conducted to examine primarily the effect of cellulose acetate butyrate on varnish performance. The specific formulation is referred to table 4.
Table 4 formula table
| Main paint component | Dosage of | Curing agent component | Dosage of |
| Acrylic resin 1339-s-80 | 63 | N3390 curing agent | 42 |
| Silicone polyester resin E901 | 20 | Acetic acid butyl ester | 3.5 |
| CAB2100 (solid content 0.3) | 6.15 | Xylene | 3.5 |
| CAB553-0.4 | 0 | Dehydrating agent | 0.15 |
| Methyl n-amyl ketone | 4 | ||
| Organotin drier DBTDL | 0.04 | ||
| Acetic acid butyl ester | 3 | ||
| Xylene | 2 | ||
| Propylene glycol methyl ether acetate | 1 | ||
| Light stabilizer 292 | 0.2 | ||
| Ultraviolet light absorber 1130 | 0.3 | ||
| Leveling agent | 0.4 | ||
| Defoaming agent BYK141 | 0.08 | ||
| Total of | 100.17 | 49.15 |
Comparative example 2
Substantially as in example 1, this comparative example shows the effect of predominantly methyl-n-amyl ketone on varnish performance. The specific formulation is referred to table 5.
Table 5 formula table
| Main paint component | Dosage of | Curing agent component | Dosage of |
| Acrylic resin 1339-s-80 | 63 | N3390 curing agent | 42 |
| Silicone polyester resin E901 | 20 | Acetic acid butyl ester | 3.5 |
| CAB2100 (solid content 0.3) | 6.15 | Xylene | 3.5 |
| CAB553-0.4 | 0 | Dehydrating agent | 0.15 |
| Methyl n-amyl ketone | 0 | ||
| Organotin drier DBTDL | 0.04 | ||
| Acetic acid butyl ester | 5 | ||
| Xylene | 3 | ||
| Propylene glycol methyl ether acetate | 2 | ||
| Light stabilizer 292 | 0.2 | ||
| Ultraviolet light absorber 1130 | 0.3 | ||
| Leveling agent | 0.4 | ||
| Defoaming agent BYK141 | 0.08 | ||
| Total of | 100.17 | 49.15 |
The test items of the present invention were mainly examined on the hardness of paint film and the drying time of the application under low temperature condition (5-10 ℃ C.) after the application of examples 1-4 and comparative examples 1 and 2 to the surface of the automobile.
The results of the tests are shown in Table 6.
TABLE 6 test results
The following can be known from the detection results: the choice of CAB has a significant effect on drying time, paint film hardness. The CAB2100 has the characteristics of improving the drying speed and reducing VOC; CAB553-0.4 has excellent compatibility and high hydroxyl content, can improve higher crosslinking density, has low viscosity and high glass transition temperature, can be matched with CAB2100, improves the construction condition under low temperature while improving the glass transition temperature, and ensures that the CAB553-0.4 has higher drying speed, improves the film forming speed and keeps the film hardness under the low temperature. Both of these are important conditions for maintaining the hardness of the film layer at low temperatures in the presence of the host resin.
The addition of methyl n-amyl ketone has little influence on the drying time, has more obvious influence on VOC and has relatively obvious influence on the hardness of a paint film.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (6)
1. The high-hardness low-VOC automobile varnish suitable for low-temperature use is characterized by comprising a main paint component and a curing agent component;
the main paint comprises the following components in parts by weight:
1339-s-8060-65 parts of acrylic resin;
e90116-23 parts of Yingchuangdegussa organic silicon polyester resin;
CAB 21001-1.5 shares;
0.6 part of CAB 553-0.40.4;
3-5 parts of methyl n-amyl ketone;
0.02-0.05 part of organotin drier DBTDL;
4-8 parts of a diluent;
the curing agent comprises the following components in parts by weight:
40-45 parts of N3390 curing agent;
5-10 parts of solvent and dehydrating agent;
the ratio of the main paint component to the curing agent component is 1.8-2.2: 1.
2. The high hardness low VOC automotive varnish suitable for low temperature use of claim 1, wherein said main paint component further comprises:
2920.1-0.3 part of light stabilizer;
11300.2-0.4 part of ultraviolet absorber;
defoaming agent BYK 1410.06-0.1 part;
0.3-0.6 part of leveling agent.
3. The high hardness low VOC automotive varnish suitable for low temperature use according to claim 2, wherein the leveling agent is one or more of the combination of EFKA 3600, TEgo450, TEgo Flow 300.
4. High hardness low VOC automotive varnish suitable for low temperature use according to claim 1, characterized in that said dehydrating agent is a combination OF OF dehydrating agent and T1 dehydrating agent; the weight ratio OF the OF dehydrating agent to the T1 dehydrating agent is 1-2: 1-2.
5. The high-hardness low-VOC automobile varnish suitable for low-temperature use according to claim 1, wherein the dehydrating agent is 0.1 to 0.2 parts; the solvent is a combination of butyl acetate and xylene, and the solvent accounts for 5-7 parts.
6. The high hardness low VOC automotive varnish suitable for low temperature use of claim 1, wherein said diluent is a combination of butyl acetate and xylene.
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Citations (3)
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|---|---|---|---|---|
| CN101619194A (en) * | 2008-07-02 | 2010-01-06 | 紫荆花制漆(上海)有限公司 | Yellowing-resistant quick-drying polyurethane wood paint and using method thereof |
| CN102676017A (en) * | 2012-04-27 | 2012-09-19 | 北京展辰化工有限公司 | Wood lacquer and preparation method thereof |
| CN103194145A (en) * | 2013-03-20 | 2013-07-10 | 徐州华日化学工业有限公司 | High-solid coating and preparation method thereof |
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2021
- 2021-09-27 CN CN202111137544.9A patent/CN113773711A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101619194A (en) * | 2008-07-02 | 2010-01-06 | 紫荆花制漆(上海)有限公司 | Yellowing-resistant quick-drying polyurethane wood paint and using method thereof |
| CN102676017A (en) * | 2012-04-27 | 2012-09-19 | 北京展辰化工有限公司 | Wood lacquer and preparation method thereof |
| CN103194145A (en) * | 2013-03-20 | 2013-07-10 | 徐州华日化学工业有限公司 | High-solid coating and preparation method thereof |
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