KR101856744B1 - High reflective coating composition - Google Patents
High reflective coating composition Download PDFInfo
- Publication number
- KR101856744B1 KR101856744B1 KR1020150178986A KR20150178986A KR101856744B1 KR 101856744 B1 KR101856744 B1 KR 101856744B1 KR 1020150178986 A KR1020150178986 A KR 1020150178986A KR 20150178986 A KR20150178986 A KR 20150178986A KR 101856744 B1 KR101856744 B1 KR 101856744B1
- Authority
- KR
- South Korea
- Prior art keywords
- weight
- parts
- coating composition
- pigment
- present
- Prior art date
Links
Classifications
-
- 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
- C09D5/004—Reflecting paints; Signal paints
-
- 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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paints Or Removers (AREA)
Abstract
The present invention relates to a highly reflective functional coating composition, and more particularly, to a highly reflective functional coating composition which can exhibit excellent high reflection properties without containing melamine, extender pigment and fluorescent substance, and which is suitable for a lighting apparatus or an image appliance backlight panel ≪ / RTI >
Description
The present invention relates to a highly reflective functional coating composition, and more particularly, to a highly reflective functional coating composition which can exhibit excellent high reflection properties without containing melamine, extender pigment and fluorescent substance, and which is suitable for a lighting apparatus or an image appliance backlight panel ≪ / RTI >
In order to meet the high diffuse reflection function of current consumer electronic products, high-density polyethylene terephthalate (PET) film is used inside the bottom of the TV chassis. In recent household appliances, (pre-coated metal) steel plate.
As a high-diffusely reflective coating composition that can be directly applied to a reflector, a paint using a urethane resin including an extender pigment and a fluorescent substance as a matrix has been proposed, for example, as described in Japanese Patent No. 4704794.
However, in the case of such a highly reflective coated steel sheet, appearance particles are generated by extender pigments, and QUV yellowing occurs due to fluorescent substances.
It is an object of the present invention to provide a highly diffusely reflective coating composition which is suitable for a lighting fixture or an imaged backlight panel, without the need for melamine, extender pigments and fluorescent materials, but with a high reflection function at the prior art level.
(1) 10 to 40 parts by weight of a polyester resin, (2) 5 to 30 parts by weight of an isocyanate curing agent, (3) 10 to 60 parts by weight of a transparent color pigment (4) 1 to 30 parts by weight of an additive component, and (5) 5 to 20 parts by weight of a solvent, but not including melamine, extender pigment and fluorescent substance.
The reflective functional coating composition according to the present invention is capable of securing high reflectance without containing melamine, extender pigment and fluorescent substance, and is also capable of securing corrosion resistance and other physical properties, and is suitable for domestic / Can be used.
Hereinafter, the present invention will be described in detail.
The coating composition of the present invention comprises a polyester resin.
The reflectance of the coating film increases as the refractive index ratio between the pigment and the resin increases. Therefore, in order to form a coating film having high reflection characteristics, it is preferable to use a resin having a high refractive index of 1.3 or more, preferably 1.4 or more. In the present invention, the reflectance of the coating film can be improved by using a polyester resin having a high refractive index of 1.4 to 1.6 as compared with other resins such as an acrylic resin and a fluororesin, and having excellent physical properties of a general coating film.
In order to obtain a high reflectance, the film thickness should be high, so that the polyester resin is preferably High Solid. High Solid has a high NV (non-volatile content), a high solids content of the resin, and a high solid content of the paint. Therefore, when a constant film thickness is applied, the amount of the relatively high-solids coating material is small, so that the thick film coating is easy and economical. In the present invention, by using a high solid polyester resin having NV of 40 to 80%, preferably 60 to 75%, it is possible to increase the thickness of a coating film and obtain a highly reflective functional coating film without using a fluorescent substance.
The polyester resin may have a number average molecular weight (Mn) of 1,500 to 3,000, preferably 1,500 to 1,700. If the molecular weight of the polyester resin is too low, the workability may be deteriorated. On the other hand, if the molecular weight is increased, the workability may be raised, but the hardness of the coating film may be lowered. The hydroxyl value (OHv) of the resin used in the present invention may be 80 to 100, preferably 90 to 95. On the contrary to the molecular weight, OHv has a problem that when the OHv is low, the crosslinking density is lowered and the hardness and hardness of the coating film are lowered. When the OHv is high, the crosslinking density becomes higher than necessary and the workability may be lowered.
According to one embodiment of the present invention, the polyester resin may include, for example, at least one selected from an oil-soluble saturated polyester resin and a partially-modified polyester resin, but is not limited thereto.
In the coating composition of the present invention, the content of the polyester resin may be 10 to 40 parts by weight, preferably 15 to 35 parts by weight, based on 100 parts by weight of the total composition, but is not limited thereto. If the content of the polyester resin in the composition is too small, there may be a problem with the dispersibility of the pigment and the physical properties of the coating film, and if too large, the reflectance may deteriorate.
The coating composition of the present invention comprises an isocyanate curing agent.
According to one embodiment of the present invention, the isocyanate curing agent may be one having an NCO content (the property is determined by how many NCO groups are present in one molecule) of 30 to 40, for example, isophorone diisocyanate (IPDI (HDI), toluene diisocyanate (TDI), naphthalene diisocyanate (NDI), methylene diphenyl diisocyanate (MDI), and resins thereof, as well as aliphatic isocyanates such as trimethylene terephthalate , But is not limited thereto.
In the coating composition of the present invention, the content of the isocyanate curing agent may be 5 to 30 parts by weight, preferably 10 to 25 parts by weight, based on 100 parts by weight of the total composition, but is not limited thereto. If the content of the isocyanate curing agent in the composition is too small, the -OH functional group in the polyester resin may remain unreacted and the coating may become tacky, resulting in a problem with other properties of the coating film. On the other hand, when the crosslinking density is excessively high, There may be a problem that the physical properties such as workability and workability of the panel deteriorate.
The coating composition of the present invention may contain a high-purity color pigment.
The L-value of the coloring pigment may be 95.0 to 99.9, preferably 99.2 to 99.8. The L-value indicates the luminosity, and the larger the L-value, the higher the whiteness. In the present invention, a high-purity color pigment having an L-value in the above range can be used in order to secure a high reflection characteristic. Also, the coloring pigment may have a hemogranular particle size of 4 to 7, preferably 6 to 7. The hogman particle size indicates the particle size, and the larger the number, the smaller the particle size. The coloring pigment may be TiO 2 , silica, barium sulfate or the like, preferably TiO 2 .
In the paint composition of the present invention, the content of the coloring pigment may be 10 to 60 parts by weight, preferably 15 to 55 parts by weight, based on 100 parts by weight of the total composition, but is not limited thereto. If the content of the coloring pigment in the composition is excessively small, the P / B ratio of the paint (in terms of the weight ratio (in terms of solid) of the pigment and the binder in the composition) There may be a problem that the reflectance is lowered because the distance between the pigment particles becomes narrow and the particles function optically as one particle. In the present invention, the proper Pigment / Binder ratio for securing a high reflectance is 1.2 to 1.5, preferably 1.3 to 1.4. If the P / B ratio is lower or higher than the proper P / B, the reflectance may decrease as described above.
The coating composition of the present invention comprises an additive component.
As the additive component, at least one selected from a dispersant, an anti-settling agent, an acid catalyst, a wetting and leveling agent, a quencher, an ultraviolet absorber, and polymethyl methacrylate (PMMA) no.
The total amount of the additive components contained in the coating composition of the present invention may be 1 to 30 parts by weight, preferably 5 to 25 parts by weight, based on 100 parts by weight of the total composition, but is not limited thereto. Each of the above-mentioned additives may be used in an amount of, for example, 0.1 to 5 parts by weight based on 100 parts by weight of the total composition, but is not limited thereto.
The coating composition of the present invention includes a solvent.
Examples of the solvent include dibasic esters (DBE) (e.g., dimethyl glutarate, dimethyl succinate, dimethyl adipate, trade name: RHODISOLV RPDE), aromatic solvents (e.g., KOCOSOL # 150 Flash Aromatic Naphtha 150) and isophorone, but the present invention is not limited thereto.
In the coating composition of the present invention, the content of the solvent may be 5 to 20 parts by weight, preferably 10 to 15 parts by weight, based on 100 parts by weight of the total composition, but is not limited thereto. If the content of the solvent in the composition is too low, the viscosity of the paint increases, which may cause problems in workability for securing the appearance. On the other hand, if the amount is too large, the viscosity of the paint is low and the solid content of the paint becomes low. In the present invention, the optimum viscosity of the paint is 90 to 110 seconds (20 占 폚, Ford Cup # 4).
The paint composition of the present invention can be used for a target without containing melamine, extender pigment and fluorescent substance by increasing the diffuse reflectance through an appropriate Size Control (dispersant) using a polyester resin having a high refractive index and a TiO 2 pigment having a high whiteness chromaticity Level reflectance can be ensured. In addition, it can be designed with optimal PVC (Pigment Volume Concentration) considering the reflectance. It can be painted 70 ~ 90㎛ (3C3B) by high build design by high solid considering popping due to back coating.
The coating composition of the present invention can be produced according to 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 high diffuse reflection coating.
A-1: CRF00336 (KCC product, POLYESTER resin)
(Resin Spec .: number average molecular weight 1,500 to 1,700, OHv 90-100, AV MAX.3, NV 75%, refractive index 1.5)
A-2: BPS-98S (SKYBON, POLYESTER POLYESTER RESIN)
(Resin Spec .: number average molecular weight 12,000, OHv 13 ~ 21, AV MAX.3, NV 50%, refractive index 1.5)
A-3: CRF00231 (KCC product, POLYESTER resin)
(Resin Spec .: number average molecular weight 4,200 to 4,400, OHv 20 to 30, AV 6 to 8, NV 60%, refractive index 1.5)
A-4: CRF00574 (KCC product, POLYESTER resin)
(Resin Spec .: Number average molecular weight 1,500 to 1,700, OHv 130 to 150, AV MAX.5, NV 70%, refractive index 1.5)
B-1: TI-PURE R902 (DUPONT, TiO 2 pigment, L-value 99.2 ~ 99.8, Hegmann particle size 6-7)
B-2: R-244 (Pangang Titanium, TiO 2 pigment, L-value 94.0 ~ 94.8, Hegmann particle size 6-7)
C-1: CHQ67126 (KCC product, modified curing resin, IPDI trimer, 37 to 38% of NCO, 68% of NV)
C-2: melamine resin (Changchun plastic Co., Ltd, existing hardening resin, Hexa Methoxy Methyl Melamine, NV 98%)
D: BYK-110 (BYK, polymer type dispersant)
E: CVC00817 (KCC product, anti-settling agent)
F-1: TL-100 (Songwon Industrial Co., Ltd., dibutyltin laurate (DBTDL) curing accelerator)
F-2: CVC02851 (KCC semi-finished product, acid catalyst)
G: TEGO FLOW ZFS460 (EVONIK INDUSTRIES, acrylate wetting and leveling agent)
H: SYLOID 378 (GRACE DAVISON, extinguishing agent)
I: MH-25FD (Kolon Industries, Ltd., PMMA particles)
J: TINUVIN 384-2 (BASF, UV absorber)
K: Solvent (Kocosol # 150)
L: Solvent (RPDE)
M: THREETEX OB (Samwon Industry, Fluorescent Whitening Agent)
P / B ratio: Weight ratio of pigment (Pigment) and resin (Binder)
2. Evaluation of Physical Properties of Coating Composition
The high diffusely reflective coating compositions prepared in each of the Examples and Comparative Examples were painted with 3C3B to evaluate their physical properties. The EGI coating is applied to the undercoating layer, middle layer and top layer. The DRY coating thickness of each layer is 25 ~ 30㎛ and the PMT is 224 ℃. .
After coating the examples and comparative examples under the same curing conditions as described above, specimens for testing the physical properties were prepared. The properties of the following items were evaluated for the prepared specimens, and the results are shown in the following table.
1) Reflectance evaluation: Coat the paint with a constant film thickness according to the painting specifications for each product (application), and measure the reflectance with Y value using a color difference meter (CR-400 instrument).
In the present invention, when the coating thickness is 70 to 90 占 퐉 and the Y value is 93.0 to 94.0, it is judged to be acceptable.
2) Appearance evaluation: After coating the paint, the dried specimens are visually observed to evaluate the following three types of defects, and when none of the three specimens are present, it is judged to be good.
* Type 1. Crater: The phenomenon that the paint is not wetted to the surface to cause holes or pits
* Type 2. Popping: When the film is dried, the solvent evaporates or holes are formed due to the boiling phenomenon of the film due to the transient film.
* Type 3. Roll Mark: It is a phenomenon that roll mark is generated due to low leveling property due to excessive thixo property of paint when painting.
3) Pencil hardness test: Scratch evaluation using an MIT-UNI pencil according to ASTM D3363.
4) Workability test: T-bend at 180 ° C at room temperature according to ASTM D4145, and check by cracking (15 times microscope) and taping of machining part.
5) Hardness test: Evaluated by MEK rubbing under 1 kg load in accordance with ASTM D3359.
6) Ultraviolet ray test: Coat the paint with a constant film thickness according to the paint specification for each product (application), and dry the specimen for 24 hours in 15W * 20cm condition in the UV test equipment. Using a color difference meter (CR-400), the reflectance and chrominance of the sample specimen are checked after the input of the sample specimen before the injection.
7) QUV-A evaluation: paint the coatings with a constant film thickness in accordance with the application specifications for each product (application), and dry the specimens for 48 hours and 72 hours in a weathering accelerator QUV-A. Using a color difference meter (CR-400), the reflectance and chrominance of the sample specimen are checked after the input of the sample specimen before the injection.
8) Moisture resistance test: The paint shall be applied at a constant film thickness according to the application specifications for each product (application), then dried and heated at 60 ℃ * 95% RH for 168 hours in a thermo-hygrostat. Using a color difference meter (CR-400), the reflectance and chrominance of the sample specimen are checked after the input of the sample specimen before the injection.
9) Heat resistance test: Coat the paint with a constant film thickness according to the painting specifications for each product (application), and then put the dried specimen in oven at 80 ℃ for 168 hours. Using a color difference meter (CR-400), the reflectance and chrominance of the sample specimen are checked after the input of the sample specimen before the injection.
10) Corrosion resistance test: After 240 hours according to ASTM B117, X-CUT part and plane part blister are checked and evaluated.
As can be seen from Tables 1 and 2, the coating compositions of Examples 1 and 2 were excellent in physical properties such as QUV-A, moisture resistance and heat resistance. In Comparative Example 1, QUV-A It was evaluated as bad in physical properties. In addition, in the case of Comparative Examples 2 to 3, it was confirmed that it was evaluated as defective in properties such as moisture resistance and heat resistance. Comparative Examples 4 to 5 are in accordance with the P / B Ratio change, Comparative Examples 6 to 7, the reflectance in accordance with Comparative Example 8 using the L value is relatively dark TiO 2 based on the molecular weight and change of OHv of the polyester resin 93, respectively.
Accordingly, it can be seen that when the high reflective functional coating composition of the present invention is used, it can be applied to a lighting apparatus having a high reflectance of Y value 93 or more, excellent appearance, moisture resistance, heat resistance, there was.
Claims (4)
About 100 parts by weight of the total paint composition.
(1) 10 to 40 parts by weight of a polyester resin,
(2) 5 to 30 parts by weight of an isocyanate curing agent,
(3) 10 to 60 parts by weight of a coloring pigment,
(4) 1 to 30 parts by weight of an additive component and
(5) 5 to 20 parts by weight of a solvent,
Melamine, extender pigments and fluorescent materials,
And a pigment / binder ratio of 1.2 to 1.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150178986A KR101856744B1 (en) | 2015-12-15 | 2015-12-15 | High reflective coating composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150178986A KR101856744B1 (en) | 2015-12-15 | 2015-12-15 | High reflective coating composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20170071641A KR20170071641A (en) | 2017-06-26 |
| KR101856744B1 true KR101856744B1 (en) | 2018-05-11 |
Family
ID=59282638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020150178986A KR101856744B1 (en) | 2015-12-15 | 2015-12-15 | High reflective coating composition |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR101856744B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102205286B1 (en) * | 2019-05-02 | 2021-01-20 | 최아나 | Construction method for self-luminous smart pedestrian crossings having the advanced night visibility |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4436213B2 (en) | 2003-08-29 | 2010-03-24 | パナソニック電工株式会社 | Surface treatment coating material for lighting equipment and lighting equipment |
| JP5979312B2 (en) | 2013-04-26 | 2016-08-24 | 新日鐵住金株式会社 | Pre-coated steel sheet and manufacturing method thereof |
-
2015
- 2015-12-15 KR KR1020150178986A patent/KR101856744B1/en active IP Right Grant
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4436213B2 (en) | 2003-08-29 | 2010-03-24 | パナソニック電工株式会社 | Surface treatment coating material for lighting equipment and lighting equipment |
| JP5979312B2 (en) | 2013-04-26 | 2016-08-24 | 新日鐵住金株式会社 | Pre-coated steel sheet and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20170071641A (en) | 2017-06-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106459301B (en) | Adhesion promoter for water-based paint compositions | |
| JP5680067B2 (en) | Coating agent and coating formed therefrom with high scratch resistance and high blistering resistance | |
| JP6869753B2 (en) | High solid content paint composition | |
| US8236895B2 (en) | Paint compositions, a method of finish-painting and painted objects | |
| KR102122502B1 (en) | Soft touch antifouling coating composition and coating formed therefrom | |
| CA3092258C (en) | Multi-layer coating film formation method | |
| KR20180017091A (en) | Antifouling coating compositions and coatings formed therefrom | |
| CN105199496A (en) | Coating composition | |
| EP1417245A1 (en) | Coating agents and a process for the preparation of multi-layer coatings | |
| CN116507427B (en) | High solids coating composition and method of forming multilayer coating film | |
| KR101856744B1 (en) | High reflective coating composition | |
| KR101978060B1 (en) | 2-liquid type top coating paint for car using high solid Acrylic Polyol resin | |
| US20150210885A1 (en) | Matting Paste Composition | |
| JP2012505300A (en) | Scratch- and weather-resistant lacquer curable with actinic radiation or with heat and actinic radiation | |
| JP2015028136A (en) | Coating composition and multilayer coating film formation method | |
| JP2021138819A (en) | Coating composition and multi-layered coating film formation method | |
| KR101394819B1 (en) | Coating composition enhanced scratch resistance for interior panel of automobile | |
| JP6738848B2 (en) | Multi-layer coating method | |
| KR102241196B1 (en) | Silicone-containing polyester, coating composition containing same, and coating made therefrom | |
| US7288582B2 (en) | Colored compositions with substrate-hiding materials | |
| JP2015232149A (en) | Resin used for coating composition | |
| CN110773402B (en) | Multilayer coating and method of forming the same | |
| CN113166578B (en) | Coating composition | |
| KR20150071907A (en) | Two-part coating composition for non-ferrous metal | |
| CN106232665B (en) | The aqueous dispersion of at least two fluoropolymer resins and comprising it for applying the water-based paint compositions of finishing coat |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E601 | Decision to refuse application | ||
| AMND | Amendment | ||
| X701 | Decision to grant (after re-examination) | ||
| GRNT | Written decision to grant |