KR101806003B1 - Isophorone-free, fluorinated resin coating composition for PCM - Google Patents
Isophorone-free, fluorinated resin coating composition for PCM Download PDFInfo
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- KR101806003B1 KR101806003B1 KR1020160007412A KR20160007412A KR101806003B1 KR 101806003 B1 KR101806003 B1 KR 101806003B1 KR 1020160007412 A KR1020160007412 A KR 1020160007412A KR 20160007412 A KR20160007412 A KR 20160007412A KR 101806003 B1 KR101806003 B1 KR 101806003B1
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- fluororesin
- weight
- pcm
- coating composition
- solvent
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Classifications
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- C09D7/001—
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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
- C09D127/00—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 a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C09D127/16—Homopolymers or copolymers of vinylidene fluoride
-
- C09D7/1233—
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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 present invention relates to a fluororesin coating composition for PCM without isophorone and, more particularly, to a fluororesin coating composition for PCM which is free of isophorone and which has the same workability and excellent physical properties as fluororesin coatings as compared with conventional fluororesins, excellent workability and adhesion, excellent heat resistance and cold resistance, It has high corrosion resistance and excellent chemical resistance. It does not contain isophorone which is harmful substance, so it can improve working environment because it has less smell and smoke than conventional paint. To a fluororesin coating composition for PCM.
Description
The present invention relates to a fluororesin coating composition for PCM without isophorone and, more particularly, to a fluororesin coating composition for PCM which is free of isophorone and which has the same workability and excellent physical properties as fluororesin coatings as compared with conventional fluororesins, excellent workability and adhesion, excellent heat resistance and cold resistance, It has high corrosion resistance and excellent chemical resistance. It does not contain isophorone which is harmful substance, so it can improve working environment because it has less smell and smoke than conventional paint. To a fluororesin coating composition for PCM.
A fluororesin such as polyvinylidene fluoride (PVdF) is a functional thermoplastic resin in which a part or all of hydrogen atoms are substituted with fluorine atoms in an aliphatic hydrocarbon-based polymer structure such as polyethylene.
Fluorine has the highest electronegativity (4.0), and the bond between the fluorine atom and the carbon atom ("carbon-fluorine" bond) is bound to a very high bond energy of 105.4 Kcal / mole. In addition, the bonding distance of carbon-fluorine is as short as 1.36 Å, providing dense and dense molecular structure. Furthermore, the large volume of fluorine atoms causes steric hindrance, protecting the carbon-carbon bonds and making it difficult to destroy the bonds of carbon-fluorine.
Fluorine coatings for PCM (Pre-coated Metal, Coil coating) containing a fluororesin as a main resin component (for example, 50% or more, or 70% or more of total resin components) , Excellent heat and cold resistance, ultra high weatherability, high corrosion resistance, excellent chemical resistance and excellent abrasion resistance.
Conventional PCM fluorine coatings (for example, Korean Unexamined Patent Publication No. 10-2000-0047280, " non-polluting high temperature fluorine coating composition ") are prepared by applying isophorone, which is a high boiling point polar solvent, as a solvent in order to improve flowability and dielectric properties Respectively. However, due to the application of isophorone, the smell (odor) smoke is severely generated during the coating operation in the PCM coater, which adversely affects the work environment of the operator. In some parts of Europe, it is prohibited to use isophorone because it is harmful substance, so it is impossible to sell isophorone-applied fluoride paint.
It is an object of the present invention to provide a fluororesin coating for PCM which does not use isophorone as a solvent and which has the same workability as the conventional fluororesin and excellent workability and adhesion property of the fluororesin coating material and excellent heat resistance and cold resistance, Corrosion resistance, and excellent chemical resistance of the fluororesin coating composition.
The fluororesin coating composition for PCM of the present invention comprises (1) a resin containing a fluororesin, (2) a solvent, and (3) an additive component, wherein the solvent contains ethylcarbitol acetate and contains isophorone .
INDUSTRIAL APPLICABILITY The fluororesin coating composition for PCM according to the present invention satisfies the same workability and the same physical properties as those of conventional fluororesin coatings and can improve the working environment due to less odor and smoke generated in line work than conventional paints, In addition, it does not contain regulated substances in Europe, so it can be prepared against environmental regulations in domestic and foreign markets.
Hereinafter, the present invention will be described in detail.
The fluororesin coating composition for PCM of the present invention comprises a resin component comprising a fluororesin.
According to one embodiment of the present invention, the fluororesin is a thermoplastic or crystalline polymer containing at least two fluorine (F) atoms in the atoms constituting the resin, such as polyvinylidene fluoride (PVDF) Preferably having a molecular weight (MW) of 200,000 to 1,000,000, and more preferably having a molecular weight (MW) of 200,000 to 400,000 can be used. The fluororesin preferably has a melting point (mp) of 140 to 180 ° C, may have a specific gravity of 1.70 to 1.80 and may have a solid content (based on coating composition) of 20 to 70% by weight , But is not limited thereto.
In the coating composition of the present invention, the fluororesin content in the resin component may be, for example, 50 to 95% by weight, preferably 55 to 90% by weight, based on 100% It is not. When the content of the fluororesin in the resin component is too small, there arises a problem in weatherability, and workability, adhesiveness, chemical resistance and the like may be lowered. .
According to one embodiment of the present invention, the resin component may further include at least one resin component other than the fluororesin. Examples of the resin component other than the fluororesin usable in the present invention include at least one selected from a thermoplastic acrylic resin and a thermosetting acrylic resin.
Since fluororesin is difficult to apply to paints alone due to its low solubility, a thermoplastic acrylic resin is mainly used. When a mixture of a fluororesin and a thermoplastic resin is used, not only the workability of the coating material production is improved, but also a uniform coating film can be formed to maintain a good appearance of the coating film.
In the coating composition of the present invention, the content of the resin component other than the fluororesin in the resin component may be, for example, 5 to 50% by weight, preferably 10 to 45% by weight, based on 100% , But is not limited thereto. When the amount of the resin component other than the fluororesin in the resin component is less than 5% by weight, it is difficult to sufficiently disperse the fluororesin, so that it is difficult to form a uniform coating film, the appearance of the coated film becomes poor, the bonding force between the resin decreases, And the mechanical properties of the coating film may be deteriorated. On the other hand, when the amount of the resin component other than the fluororesin is more than 50% by weight, the surface of the coating film on which the acrylic resin having poor weather resistance and durability is exposed is exposed to the surface of the coating film to decrease the chemical resistance, corrosion resistance and weatherability. I can lose it.
The amount of the resin component contained in the PCM fluoropolymer resin coating composition of the present invention may be, for example, 10% by weight to 70% by weight, preferably 30% by weight to 60% by weight, . If the content of the resin component in the composition is too low, there may be a problem in line workability, coat appearance, workability, etc. On the contrary, if the content is too high, the pigment content may be small, There may be a problem in adhesion.
The fluororesin coating composition for PCM of the present invention comprises a solvent component.
As described above, the solvent component of the present invention does not include isophorone and includes ethylcarbitol acetate.
In the coating composition of the present invention, the ethylcarbitol acetate content in the solvent component may be, for example, 50 to 100% by weight, preferably 70 to 90% by weight, based on 100% But is not limited thereto. If the content of ethylcarbitol acetate in the solvent component is too small, the solubility to the fluororesin may be lowered, and the flammability of the fluororesin may become excessively high, which may cause problems in workability.
According to one embodiment of the present invention, the solvent component may further comprise one or more solvent components other than ethylcarbitol acetate. Examples of solvent components other than ethylcarbitol acetate that can be used in the present invention include butyrolactone, butylcarbitol acetate, methylisobutylketone, cyclohexanone, diacetone alcohol, diisobutylketone, ethylacetoacetate, propylene And at least one selected from carbonate, xylene, propylene glycol monomethyl ether acetate (PMA), butyl cellosolve, butyl cellosolve acetate, and terpineol. According to one preferred embodiment of the present invention, a combination of ethylcarbitol acetate and diacetone alcohol is used as the solvent component, and the mixing ratio thereof is 1: 0.1 to 1: 0.5 in terms of the weight ratio of ethylcarbitol acetate: diacetone alcohol , More specifically from 1: 0.2 to 1: 0.4, may be advantageous in terms of fluororesin dispersibility and workability, but is not limited thereto.
The amount of the solvent component contained in the fluororesin coating composition for PCM of the present invention may be, for example, 20 to 70% by weight, more preferably 30 to 50% by weight, based on 100% by weight of the total composition, It is not. If the content of the solvent component in the composition is too small, there may be a problem in PCM workability. Conversely, if it is too much, the amount of the coating material may increase, the appearance may be deteriorated, and there may be a problem that the working smell is severe.
The fluorocarbon resin coating composition for PCM of the present invention comprises an additive component.
As the additive component, for example, at least one selected from pigments, shaving agents, plasticizers, antistatic agents, antifoaming agents and waxes may be used.
For example, the pigment may be at least one selected from titanium dioxide (TiO 2 ), iron oxide, antimony yellow and inorganic black pigments, the pigments may be at least one selected from bentonite and thermosetting acrylic resins, and the plasticizer may be dimethyl phthalate , And the antistatic agent may be a CYTEC product, but the present invention is not limited thereto.
The amount of the additive component contained in the PCM fluoropolymer resin coating composition of the present invention may be, for example, 5 to 36% by weight, preferably 15 to 25% by weight, based on 100% by weight of the total composition, no. The pigment may be used in an amount of 5 to 25% by weight based on 100% by weight of the composition, 0.1 to 5% by weight of the plasticizer, 0.1 to 5% by weight of the plasticizer, May be used in an amount of 0.01 wt% to 1 wt%, but is not limited thereto.
The fluororesin coating composition for PCM of the present invention can be produced by a conventional method for preparing a coating composition using the above-mentioned components.
Hereinafter, the present invention will be described in more detail with reference to Examples. However, the scope of the present invention is not limited to the embodiments.
[ Example ]
1. Preparation of Coating Composition
The components of the composition shown in Table 1 below were blended to prepare a PCM coating.
A: Poly-vinylidene di-Fluoride (molecular weight 200,000 ~ 400,000)
B: Thermoplastic acrylic resin (solid content: 40%)
C-1: Ethyl Carbitol Acetate
C-2: butyl carbitol acetate
C-3: Diacetone alcohol
C-4: Isophorone
C-5: Cyclohexanone
D: TiO 2
E: Bentonite
F: thermosetting acrylic resin
G: Dimethyl phthalate
H: Antistatic agent (CYTEC INDUSTRIES INC.)
I: adhesion promoter
2. Evaluation of Physical Properties of Coating Composition
The physical properties of each of the paints prepared as described in the following Table 2 were evaluated, and the results are shown in Table 2. Each coating was coated with a 5 micron undercoating on a galvanized steel sheet, 20 microns of a fluorine coating top coat and cured at 241 ° C to 249 ° C on a PMT (Peak Metal Temperature) basis to form a coating.
Property evaluation method
1) Processability: Evaluation of cracking condition and adhesion degree by processing 180 degrees at room temperature
- Excellent: No cracking or peeling
- Good: More than 0% crack, less than 20%
- Defective: more than 20% crack
2) Hardness: Mitsubishi uni pencil with 5 lines and no more than 3 lines
- Excellent: No trace
- Good: 1 to 2 lines
- Bad: More than 3 lines
3) Solvent resistance: Methyl ethyl ketone (MEK) is buried in gauze and the number of times of reciprocation with 1Kg load
- Excellent: Over 100 times
- Good: 50 times or more, less than 100 times
- Defective: Less than 50 times
4) Adhesiveness: The specimens were cross cut at a distance of 1 mm and 100 cross cuts,
- Excellent: No peeling.
- Good: 1 ~ 2 peeling
- Defective: more than 3 peeling
5) Adhesion after wetting: After immersing the specimen in boiling water at 100 ℃ for 1 hour, 4)
- Excellent: No peeling
- Good: 1 ~ 5 peeling
- Defective: Over 5 peeling
6) Chemical Resistance: 5% HCl, 5% NaOH solution is spot test on specimen, and after 24 hours at room temperature (25 ℃)
- Excellent: No trace
- Good: With light stains
- Poor: Blister occurrence
7) Corrosion resistance: According to the ASTM B117 standard, X-shaped scratches were formed in the center of a specimen with a knife, and after 500 hours of corrosion resistance test, the occurrence length of white rust and the blister occurrence length of the edge
- Excellent: X-CUT 1 mm or less; Edge less than 3mm
- Good: X-CUT greater than 1 mm, less than 2 mm; Edge more than 3mm, less than 5mm
- Defective: X-CUT more than 2mm; Edge exceeds 5mm
8) Weatherability: Evaluation of color difference and gloss retention after 5,000 hours evaluation by Q-LAB QUV-A test according to ASTM D 4587
- Excellent: color difference less than 2.0; Gloss retention rate 80% or more
- Good: color difference exceeding 2.0, not more than 5.0; Gloss retention rate 50% or more, less than 80%
- Poor: color difference exceeding 5.0; Less than 50% gloss retention
9) Paint odor: Check the degree of odor after paint curing
10) Line workability: Determine whether PCM Coater line workability and appearance are good
Claims (5)
(2) a solvent, and
(3) an additive component,
Wherein the solvent comprises ethyl carbitol acetate and does not contain isophorone.
10 to 70% by weight of a resin containing a fluororesin;
20 to 70% by weight of a solvent; And
5 to 36% by weight of an additive component;
Wherein the fluororesin coating composition for PCM is a fluoropolymer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020160007412A KR101806003B1 (en) | 2016-01-21 | 2016-01-21 | Isophorone-free, fluorinated resin coating composition for PCM |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020160007412A KR101806003B1 (en) | 2016-01-21 | 2016-01-21 | Isophorone-free, fluorinated resin coating composition for PCM |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20170087988A KR20170087988A (en) | 2017-08-01 |
| KR101806003B1 true KR101806003B1 (en) | 2017-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020160007412A KR101806003B1 (en) | 2016-01-21 | 2016-01-21 | Isophorone-free, fluorinated resin coating composition for PCM |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100228935B1 (en) * | 1992-01-02 | 1999-11-01 | 파블릭크 헬렌 에이 | Isophorone-free fluorocarbon coating composition |
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2016
- 2016-01-21 KR KR1020160007412A patent/KR101806003B1/en active IP Right Grant
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100228935B1 (en) * | 1992-01-02 | 1999-11-01 | 파블릭크 헬렌 에이 | Isophorone-free fluorocarbon coating composition |
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| Publication number | Publication date |
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| KR20170087988A (en) | 2017-08-01 |
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