KR101811629B1 - Non-skid heavy duty coating composition - Google Patents
Non-skid heavy duty coating composition Download PDFInfo
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- KR101811629B1 KR101811629B1 KR1020160008485A KR20160008485A KR101811629B1 KR 101811629 B1 KR101811629 B1 KR 101811629B1 KR 1020160008485 A KR1020160008485 A KR 1020160008485A KR 20160008485 A KR20160008485 A KR 20160008485A KR 101811629 B1 KR101811629 B1 KR 101811629B1
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- South Korea
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- epoxy resin
- bisphenol
- coating composition
- amine
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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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- 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
- C09D5/16—Antifouling paints; Underwater paints
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- C09D7/1216—
-
- C09D7/1233—
Landscapes
- 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 heavy-duty coating composition which is excellent in impact resistance and abrasion resistance by using aluminum oxide having a high hardness as a non-skid material, and which can be applied to ships, offshore structures, offshore and onshore plants.
Description
The present invention relates to a heavy-duty coating composition.
The existing non-skid (non-skid) paints were painted with airless paint and then sprayed with non-skid material onto the applied paint to create a non-skid surface.
However, this method is a form in which the non-skid material is simply placed on the coating film, and the non-skid material easily falls off from the coating due to the external impact, and thus it can not serve as a continuous non-skid coating. In addition, since the silica sand used as a non-skid material in the prior art is weak in self-hardness and is resistant to wear damage due to scrapping, an off-shore deck requiring high abrasion resistance and high impact resistance ) Site and the like.
An object of the present invention is to provide a heavy-duty coating composition which is excellent in impact resistance and abrasion resistance by using aluminum oxide having a high hardness as a non-skid material, and which can be applied to ships, offshore structures, offshore and onshore plants.
The heavy-duty coating composition of the present invention comprises 3 to 15% by weight, based on 100% by weight of the composition, of a bisphenol A type epoxy resin having two or more epoxy groups; 5 to 20% by weight of a bisphenol F type epoxy resin having two or more epoxy groups; 3 to 15% by weight amine curing agent; And 55 to 75 wt% of aluminum oxide, and the amine curing agent is a mixture of a cyclic aliphatic amine and a polyether amine.
The heavy coating composition according to the present invention is excellent in impact resistance and abrasion resistance by using aluminum oxide having a high hardness as a non-skid material, and is capable of coating a gravity feed hopper gun, An excellent appearance can be secured even when a dry coating film is formed. Therefore, it can be effectively applied to decks, walkways, etc. of ships, offshore structures, offshore plants or onshore plants.
Hereinafter, the present invention will be described in more detail.
The heavy-duty coating composition of the present invention comprises 3 to 15% by weight, based on 100% by weight of the composition, of a bisphenol A type epoxy resin having two or more epoxy groups; 5 to 20% by weight of a bisphenol F type epoxy resin having two or more epoxy groups; 3 to 15% by weight amine curing agent; And 55 to 75 wt% of aluminum oxide, and the amine curing agent is a mixture of a cyclic aliphatic amine and a polyether amine.
The epoxy resin to be used in the composition of the present invention is produced by reacting diphenyl with epichlorohydrin and comprises two kinds of epoxy resins, that is, a bisphenol A type epoxy resin having two or more epoxy groups as shown in formula (1) Bisphenol F type epoxy resin having two or more epoxy groups as described in " 2 "
The bisphenol A type epoxy resin and the bisphenol F type epoxy resin may have an epoxy equivalent of 150 to 200 g / eq. In the case of epoxy equivalents, the molecular weight of one epoxy group affects the physical properties of the paint ultimately because it affects dryness, crosslinking formation, and the like upon formation of a coating film, so that an epoxy resin within the equivalent range can be used. Outside this range of equivalence, the viscosity is too high to be suitable for the dispersibility of paints and the workability of airless painting.
The bisphenol A type epoxy resin may have a viscosity of 11,000 to 14,000 cps at 25 ° C, and the bisphenol F type epoxy resin may have a viscosity of 5,000 to 8,000 cps at 25 ° C.
By mixing two kinds of epoxy resins, it is possible to control the viscosity of the coating material and also to complement the physical properties of the coating film such as chemical resistance and rust prevention property.
[Chemical Formula 1]
(2)
The composition of the present invention may contain 3 to 15% by weight of a bisphenol A type epoxy resin and 5 to 20% by weight of a bisphenol F type epoxy resin, based on 100% by weight of the total composition. When the epoxy resin content is small, the content of the pigment is relatively increased. Therefore, the paint viscosity is increased and the mechanical properties such as hardness of the coating film is decreased. When the epoxy resin content is large, the hiding power is decreased, the workability is poor and the mechanical / Lt; / RTI >
As the amine curing agent used in the composition of the present invention, a mixture of cyclic aliphatic amines and polyether amines can be used, the ratio being about 2.5: 1 to 3: 1.
As the amines, cyclic aliphatic amines of the formula (3) and polyether amines of the formula (4) can be used which have a non-volatile content of 100%. The cyclic aliphatic amine has an amine value of 250 to 350 mgKOH / g and a viscosity of 100 to 200 cps at 25 ° C. The polyether amine has lower viscosity than the cyclic aliphatic amine and is advantageous in adjusting the viscosity of the paint and can improve the impact resistance.
When two kinds of amine curing agents are mixed, it is advantageous to control the drying time and the drying time, and the mechanical strength of the coating film can be enhanced.
(3)
[Chemical Formula 4]
The composition of the present invention may comprise from 3 to 15% by weight of an amine curing agent, based on 100% by weight of the total composition. When the content of the cyclic aliphatic amine is small, the rustproofing property is poor, and when the content is large, it is difficult to secure the pot life. When the content of the polyether amine curing agent is small, the impact resistance improving effect is insignificant, and when the content is large, there is a problem that the drying property is lowered.
The aluminum oxide used in the composition of the present invention serves as a non-skid material, and has a Mohs hardness of 9, followed by a high hardness of the diamond. Although not particularly limited, the aluminum oxide may be Al 2 O 3 And a particle size of 0.4 to 0.8 mm can be used.
The composition of the present invention may comprise 55 to 75% by weight of aluminum oxide, based on 100% by weight of the composition. Since aluminum oxide is a major raw material for forming a non-skid surface, when the content is small, non-skid forms a dense coating film, which affects impact resistance and abrasion resistance. When the content is excessively applied, This may result in a bad holiday (holiday), in which the coating is not normally applied, but the surface of the substrate is exposed, or only the area is coated very low.
The composition of the present invention may contain a solvent such as xylene, methyl ethyl ketone (MEK), propylene glycol methyl ether (PM), or the like.
The composition of the present invention may further comprise at least one additive selected from extender pigments, color pigments, dispersants, curing accelerators and flow inhibitors. But is not limited to, 0.1 to 20% by weight of additives relative to 100% by weight of the total composition.
The composition of the present invention can be coated with a gravity feed hopper gun, and excellent appearance can be secured due to excellent drying even when a thick film dried to a thickness of about 1,000 탆 is formed. Unlike existing non-skid paints, it has excellent abrasion resistance and impact resistance. The composition of the present invention is therefore effectively applicable to onshore and offshore steel structures such as decks and walkways of ships, offshore structures, offshore plants or onshore plants.
The composition of the present invention secures the following physical properties of official authentication.
※ Certified (NORSOK certified)
- Certification Name: NORSOK M-501, rev.6 Certification
- Test specification: M-501, ISO20340
- Certification site: System No. 4 (walkway, escape route)
- Certification specification: EH2350 (150㎛) / EH3200 (N) (1,000㎛)
- Laboratory: EXOVA (Singapore)
Hereinafter, the present invention will be described in more detail with reference to examples and comparative examples. However, the scope of the present invention is not limited thereto.
[Example]
Table 2 shows the properties of the anticorrosive coating composition.
Initially, a flow inhibitor of a benton system was added to a bisphenol A type epoxy resin (epoxy equivalent weight 175 g / eq) and a bisphenol F type epoxy resin (epoxy equivalent weight 175 g / eq), and soya oil was added as a dispersant and stirred to prepare a reaction solution. The sieving pigment was slowly added to the reaction solution at a predetermined weight and stirred. To the reaction solution, a white pigment (titanium dioxide) and a black pigment (carbon black) were gradually added as a color pigment and stirred. The reaction solution was dispersed using a sand mill until the particle size became 60 μm or less, and then xylene, MEK, and PM were added as a solvent to prepare a PTA (subject portion). Next, a trivalent amine promoter as a promoter and a small amount of xylene, MEK and PM as a solvent were added to a cyclic aliphatic amine resin and a polyether amine resin to prepare a PTB (curing agent) portion. PTB (curing agent) was added to the PTA (subject), and the mixture was firstly stirred, and then PTC (additive) was added thereto, followed by secondary stirring to prepare a heavy coating composition.
- Epoxy resin 1: bisphenol A type epoxy resin (epoxy equivalence 150-200 g / eq, National highway synthetic resin product)
- Epoxy resin 2: Bisphenol F type epoxy resin (epoxy equivalent 150-200 g / eq, National highway synthetic resin product)
- xylene, MEK, PM: solvent
- Extending Pigment: Talc (Talc)
- Color pigments: white pigment (titanium dioxide), black pigment (carbon black)
- Dispersing agent: Soya oil
- Flow inhibitor: Benton flow inhibitor (BYK)
- Amine resin 1: Cycloaliphatic amine resin (R, R ': cyclohexene ring, X: CH 2 , n: 1)
- amine resin 2: polyether amine resin (Huntsman)
- Accelerator: trivalent amine accelerator (ACCELERATOR 2950 CH, Huntsman)
- Non-skid material: aluminum oxide (particle size 0.5mm)
Test method and evaluation standard
First, the rust, dust, moisture, oil and other contaminants on the surface of the substrate were completely removed using fresh water or an appropriate solvent, and then blasted with a surface roughness of 25 to 75 μm. Then, the prepared specimen was painted using an airless gravity pit hopper gun. (Tip size: 8 mm) For the specimens with physical properties, a dry coating film of 1000 μm was applied under the horizontal condition. The specimens were dried for more than one week, and the results of the tests are shown in Table 2 below.
- Workability: When working with hopper gun, it should be good when checking the pattern of paint when paint is sprayed, appearance and holiday of paint after painting.
- Impact resistance: According to MIL-PRF-24667C, when the coating is applied with a force of 21.2J, 90% of uncovered parts should not be removed without coating deterioration.
- Abrasion resistance: Abrasion resistance (according to ASTM D4060) (using CS-17 wheels and 1000 cycles after 1000g load), the weight difference between coating before and after test should be less than 60mg
- Drying time: It should be less than 8hrs (25 ℃, solidified drying condition) when it is completely dried so that it does not enter the coating when the nail is pressed with 1000um of paint on the glass coating.
Claims (6)
3 to 15% by weight of a bisphenol A type epoxy resin having two or more epoxy groups;
5 to 20% by weight of a bisphenol F type epoxy resin having two or more epoxy groups;
3 to 15% by weight amine curing agent; And
55 to 75 wt%
Lt; / RTI >
Wherein the amine curing agent is a mixture of cyclic aliphatic amine and polyether amine in a weight ratio of 2.5: 1 to 3: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020160008485A KR101811629B1 (en) | 2016-01-25 | 2016-01-25 | Non-skid heavy duty coating composition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020160008485A KR101811629B1 (en) | 2016-01-25 | 2016-01-25 | Non-skid heavy duty coating composition |
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| Publication Number | Publication Date |
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| KR20170089051A KR20170089051A (en) | 2017-08-03 |
| KR101811629B1 true KR101811629B1 (en) | 2017-12-27 |
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| KR102296628B1 (en) * | 2019-09-02 | 2021-09-01 | 주식회사 케이씨씨 | Epoxy Coating Composition |
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