KR101824880B1 - Coating composition for form panel edge - Google Patents
Coating composition for form panel edge Download PDFInfo
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- KR101824880B1 KR101824880B1 KR1020150137692A KR20150137692A KR101824880B1 KR 101824880 B1 KR101824880 B1 KR 101824880B1 KR 1020150137692 A KR1020150137692 A KR 1020150137692A KR 20150137692 A KR20150137692 A KR 20150137692A KR 101824880 B1 KR101824880 B1 KR 101824880B1
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- thickener
- acrylic emulsion
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/02—Emulsion paints including aerosols
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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
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
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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
- C09D175/04—Polyurethanes
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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
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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)
- Dispersion Chemistry (AREA)
Abstract
The present invention relates to a coating paint for a mold panel edge, and more particularly, to a coating material having relatively good water repellency, chemical resistance and shelf life unlike ordinary acrylic emulsion paint.
Description
The present invention relates to a coating paint for a mold panel edge, and more particularly, to a coating material having relatively good water repellency, chemical resistance and shelf life unlike ordinary acrylic emulsion paint.
When applied to the edge of a panel using a common acrylic emulsion paint, it is relatively poor in water resistance, water repellency and chemical resistance (alkali resistance, acid resistance). When exposed to alkali or acidic aqueous solution during concrete curing, And the rainwater infiltrates into the panel edge portion of the formwork when exposed to the outside, thereby deforming the formwork panel.
In addition, in the case of an acrylic emulsion paint containing a high-density pigment, a precipitate is generated when water and diluted (paint: water (wt%) = 3: 1) This is an impossible problem.
In order to compensate for the disadvantages of these coatings' properties (water resistance, water repellency, chemical resistance, shelf life), acrylic emulsion resins with excellent chemical resistance, introduction of additives, adjustment of content of thickener, and introduction of suitable extender pigment and water repellent agent, need.
It is an object of the present invention to provide a coating material having relatively good water repellency, chemical resistance and storage property unlike a general acrylic emulsion paint.
In order to achieve the above object, the present invention provides an acrylic emulsion paint containing an additive, a thickener and a pigment in an acrylic emulsion resin having excellent chemical resistance.
The present invention relates to a paint excellent in chemical resistance and water repellency comprising an acrylic emulsion resin and a polyurethane dispersion, wherein the acrylic emulsion contains a silane monomer, has a small particle size of 80 to 100 nm, and the acrylic emulsion resin Is in the range of 30,000 to 50,000. The acrylic emulsion containing the silane monomer may be an acrylsilane copolymer emulsion.
Another embodiment of the present invention further comprises an anti-settling agent and an extender pigment, wherein the anti-settling agent is 0.1 part by mass to 0.2 part by mass, the extender pigment is 18 parts by mass to 21 parts by mass, Is 1 to 12 mu m.
Another embodiment of the present invention further comprises a silicone, paraffin wax and powder water repellent agent, wherein the amount of the powder or silicone water repellent agent is 0.1 parts by mass to 1 part by mass, and the amount of paraffin wax is 5 parts by mass to 10 parts by mass .
In another embodiment of the present invention, the silane monomer is 0.5% to 1% by weight based on the acrylic silane copolymer emulsion.
Another embodiment of the present invention is a coating material comprising a hydroxyethyl cellulose thickener and a urethane or acrylic thickener, wherein the hydroxyethylcellulose thickener is 0.1 part by mass to 0.5 part by mass, the urethane or alkali swelling thickener is 0.5 parts by mass to 1.5 parts by mass.
It is possible to obtain the same coating film as that of the initial mixed paint by improving the deformation of the formwork panel in dissolving the coating film and externally exposing it, and stirring the precipitate even after mixing with water for a long time. Another object of the present invention is to provide a coating material having relatively good water repellency, chemical resistance and shelf life, unlike ordinary acrylic emulsion paints.
The present invention relates to a paint for a mold panel edge having excellent chemical resistance and water repellency including an acrylic emulsion resin, wherein the acrylic emulsion resin has a silane monomer and a small particle size of 80 to 100 nm, And an average molecular weight of 30,000 to 50,000. The acrylic emulsion resin containing silane monomer may be an acrylsilane copolymer emulsion resin.
Here, the acrylic emulsion resin can improve chemical resistance through silane monomer and small particle size adjustment of 80 to 100 nm. In addition, the above-mentioned acrylic emulsion tends to have weak chemical resistance when the particle size exceeds 100 nm, and tends to be impossible to synthesize at less than 80 nm. The introduction of a small amount of silane monomer improved water resistance and chemical resistance. The content of the silane monomer relative to the acrylic emulsion resin is preferably 0.5% by weight to 1% by weight from the viewpoint of storage stability, water resistance and chemical resistance. Here, when the introduction of the silane monomer is 1 wt% or more, the storage stability tends to decrease. When the silane monomer is added in an amount of 0.5 wt% or less, the effect of improving water resistance and chemical resistance is insignificant.
Further, the average molecular weight of the acrylic emulsion resin is 30,000 to 50,000, and the chemical resistance can be improved. Here, when the average molecular weight of the acrylic emulsion resin is less than 30,000, the drying is slow. When the average molecular weight is more than 50,000, it is difficult to make the coating material.
The Tg of the acrylic emulsion resin is 0 to 20 ° C. When the Tg is less than 0 ° C, the film tends to weaken and the chemical resistance tends to weaken. When the temperature is more than 20 ° C, txanol (butyl carbitol) There is a tendency to weaken. The acrylic emulsion resin is preferably used in an amount of 35 parts by mass to 60 parts by mass. Use within the above range is suitable for chemical resistance and coating formation.
Anti-settling agents can improve shelf life through the use of optimized amounts. At this time, the content of the anti-settling agent is preferably 0.1 part by mass to 0.2 part by mass. When the amount of the anti-settling agent is less than 0.1 part by mass, the initial storage stability after mixing with water is poor. When the amount of the anti-settling agent is more than 0.2 parts by mass, it is difficult to produce a coating due to seed formation during coating.
As specific examples, a mineral-based silicate settling inhibitor, a mineral based settling inhibitor, a Cray settling inhibitor, a bentonite organoclay settling inhibitor and the like can be used. In particular, a bentonite organoclay anti-settling agent is more preferable in terms of storage stability and stability.
It is preferable to use calcium carbonate, talc, barium sulfate or the like as the extender pigment. As the sedimentation inhibitor is added in an excess amount, sedimentation is good after dilution with water, but a seed is generated during the paint production. Therefore, after a small amount of the sedimentation inhibitor is added, the sedimenting property can be improved after the water dilution using the extender pigment having a relatively small particle size among the extender pigment. When using extender pigments with a particle size of 1 to 12 μm or less, the sediment lumps tend to be loosened even when the paint is stored after water dilution. The extender pigment is mainly calcium carbonate, talc, barium sulfate and the like. Among them, since the sedimenting agent can be improved after water dilution using the extender pigment having a relatively small particle size among extender pigments after a small amount of sedimentation inhibitor is added, Talc and calcium carbonate based extender pigments are more preferred. It is preferable to use 18 parts by mass to 21 parts by mass from the viewpoint of improvement in sedimentation property.
The water repellency can be improved by using 1 to 12 parts by mass of the water repellent agent. When the water repellency is less than 1 part by mass, the water repellent effect is not obtained, and when the amount exceeds 12 parts by mass, the paint is floated.
Hydroxyethylcellulose thickener and urethane or alkaline swellable thickener are used. However, in view of the improvement of the paint manufacturing process, the urethane and alkali swellable thickener are used together with the hydroxyethylcellulose thickener rather than the hydroxyethylcellulose thickener alone, It is advantageous to use at least one of the thickeners in combination. The use of a hydroxyethylcellulose thickener alone tends to result in poor initial sedimentation when used. As the hydroxyethylcellulose thickener, Natrosol plus 330PA (Advanced Chemtech), Natrosol 250HBR (Advanced Chemtech), Bermocoll EHM 500 (Akno Nobel) and Hecellose HM500 (Samsung Fine Chemicals) can be used. As the urethane-based thickener, Acrysol Acrysol TT-935 (Rohm and Haas), Acrysol TT-615 (Rohm and Haas) and Acrysol DR-1 (Rohm and Haas) as an alkali swelling thickener. Can be used.
When 0.5 to 2 parts by mass of the thickener is used, initial sedimentation is improved, and when the thickener is added in an amount exceeding 2 parts by mass, the sedimentation tendency becomes poor after the initial water injection, and the sedimentation tendency becomes poor even when the amount is less than 0.5 part by mass . Therefore, when the thickener is added in an amount of 0.5 to 2 parts by weight, it exhibits the best sedimentation after water injection. It is preferable to use 0.1 to 0.5 parts by weight of a hydroxyethylcellulose thickener and 0.5 to 1.5 parts by weight of a thickener mixed with at least one of urethane and an alkali swelling thickener. When both urethane and an alkali swelling thickener are used, 0.1 to 1 part by weight of the thickener and 0.1 to 0.5 part by weight of the alkali swelling thickener are preferably used. Any one of urethane and an alkali swellable thickener may be used in place of the hydroxyethylcellulose thickener alone. However, if both the urethane and the alkali swellable thickener are used, the problem that the settleability after the initial water injection becomes poor Can be solved.
a pH adjusting agent is added to improve the adhesion of the coating film to increase the adhesive strength between the undercoating layer and the upper coating layer and to adjust the water resistance of the acrylic emulsion resin, so that the amount is preferably 0.2 part by weight to 0.5 part by weight. 0.3 to 0.7 parts by weight of a defoaming agent, 0.5 to 1 part by weight of a dispersant, 0.1 to 0.7 parts by weight of an emulsifier and 0.1 to 0.5 parts by weight of a preservative are preferably used as the other additives. It is preferable to use 5 to 30 parts by weight of water from the viewpoint of solubility.
The present invention is an acrylic emulsion paint for molds with excellent water repellency and the main part thereof is characterized by containing 15 to 22 parts by weight of filler and 7 to 12 parts by weight of iron oxide based on 100 parts by weight of the mixture.
The present invention is an acrylic emulsion paint for molds with excellent water repellency and is characterized by containing 10 parts by weight or less, preferably 5 to 10 parts by weight of paraffin wax.
Hereinafter, the present invention will be described in detail by way of example, but the present invention is not limited to the following examples.
[ Example 1 ]
17 parts by weight 0.1 part by weight of hydroxyethylcellulose thickener is slowly added to water and dissolved with stirring until complete dissolution. 0.2 parts by weight of a PH adjusting agent, 0.3 parts by weight of an antifoaming agent, 0.5 parts by weight of a dispersing agent, 0.1 parts by weight of an emulsifying agent and 0.1 parts by weight of an antiseptic agent were added thereto while stirring the above solution. Subsequently, 8.5 parts by weight of an iron oxide pigment, 0.1 part by weight of an anti-settling agent and 20 parts by weight of an extender pigment were added to the formulation, and then dispersed at 1000 to 2000 rpm until the degree of softening became 3. To the mixture, 42.5 parts by weight of an acrylsilane copolymer emulsion resin, 0.5 parts by weight of a urethane-based thickener, 0.1 parts by weight of a silicone water repellent and 10 parts by weight of paraffin wax were added.
[ Example 2 ]
18 parts by weight 0.2 parts by weight of hydroxyethylcellulose thickener was slowly added to water and dissolved with stirring until complete dissolution. 0.5 parts by weight of PH adjusting agent, 0.7 parts by weight of defoaming agent, 1.0 part by weight of dispersant, 0.7 parts by weight of emulsifier and 0.5 part by weight of preservative were added while stirring the above solution. 10 parts by weight of an iron oxide pigment, 0.2 parts by weight of an anti-settling agent and 18 parts by weight of an extender pigment were added to the above formulation, and then dispersed at 1000 to 2000 rpm until the degree of softening became 3. To the blend were added 42.1 parts by weight of an acrylsilane copolymer emulsion resin, 0.7 parts by weight of a urethane-based thickener, 0.2 parts by weight of a silicone water repellent and 8 parts by weight of paraffin wax.
[ Example 3 ]
18 parts by weight 0.2 parts by weight of hydroxyethylcellulose thickener was slowly added to water and dissolved with stirring until complete dissolution. 0.2 parts by weight of a PH modifier, 0.3 parts by weight of a defoaming agent, 0.5 parts by weight of a dispersant, 0.5 parts by weight of an emulsifier and 0.1% by weight of an antiseptic agent were added while stirring the above solution. 7 parts by weight of an iron oxide pigment, 0.1 part by weight of an anti-settling agent and 21 parts by weight of an extender pigment were added to the above formulation and dispersed at 1000 to 2000 rpm until the degree of softening became 3. 45.1 parts by weight of acrylsilane copolymer emulsion resin, 0.5 part by weight of a urethane-based thickener, 0.5 part by weight of an alkali swellable thickener, 5 parts by weight of paraffin wax and 0.1 part by weight of a silicone water repellent agent.
[ Comparative Example ]
After selecting products of the type 2 of the products manufactured in the above Examples 1 to 3, the properties of the emulsion paints containing no silane were compared with those of the acrylic emulsion paints containing no silane. The comparison of the physical properties of the comparative product with the developed product, ie, water repellency, sedimentation resistance, chemical resistance and water resistance, was conducted. The experimental results are shown in Table 2.
Particle size: 135 nm
Silane content: 0.0%
Particle size: 90 nm,
Silane content: 0.75 wt%
Here, the particle sizes of Examples 1 to 3 were 90 nm, the particle size of Comparative Example 1 was 135 nm
Respectively. In Examples 1 to 3, a silane monomer (0.75%) was used. In Comparative Example 1, silane monomers were not introduced.
(5% CH3COOH, lhr)
(5% NaOH, 1 hr)
(1 hr)
(5% CH 3 COOH, 1 hr), alkali resistance (5% NaOH (1%), and the like) in Examples 1 to 3 as well as in Examples 1 to 3 and Comparative Example 1 (5% CH3COOH, 1 hr), alkali resistance (5% NaOH, 1 hr), water resistance (1 hr) and water repellency were lowered in Comparative Example 1, Is generated.
Claims (5)
The sedimentation inhibitor and the extender pigment, 0.1 to 0.2 parts by mass of the sedimentation inhibitor, 18 to 21 parts by mass of the extender pigment, the extender pigment has a particle size of 1 to 12 占 퐉,
Silicone, paraffin wax and powder water repellent, wherein the amount of the powder or silicone water repellent agent is 0.1 parts by mass to 1 part by mass, and the amount of paraffin wax is 5 parts by mass to 10 parts by mass,
A hydroxyethyl cellulose thickener, a urethane and an alkali swelling thickener, wherein the hydroxyethylcellulose thickener is 0.1 part by mass to 0.5 part by mass, the urethane thickener is 0.1 part by mass to 1 part by mass, the alkali swellable thickener is 0.1 parts by mass to 0.5 parts by mass.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150137692A KR101824880B1 (en) | 2015-09-30 | 2015-09-30 | Coating composition for form panel edge |
| MYPI2016702779A MY180087A (en) | 2015-09-30 | 2016-07-29 | Coating composition for form panel edge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150137692A KR101824880B1 (en) | 2015-09-30 | 2015-09-30 | Coating composition for form panel edge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20170038387A KR20170038387A (en) | 2017-04-07 |
| KR101824880B1 true KR101824880B1 (en) | 2018-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020150137692A KR101824880B1 (en) | 2015-09-30 | 2015-09-30 | Coating composition for form panel edge |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR101824880B1 (en) |
| MY (1) | MY180087A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101210192B1 (en) | 2003-06-05 | 2012-12-07 | 메탈 코우팅즈 인터내쇼날 인코포레이팃드 | Compositions and methods for darkening and imparting corrosion-resistant properties to zinc or other active metals |
| JP2014080569A (en) * | 2012-09-28 | 2014-05-08 | Kansai Paint Co Ltd | Water-based coating composition and coating film forming method |
-
2015
- 2015-09-30 KR KR1020150137692A patent/KR101824880B1/en active IP Right Grant
-
2016
- 2016-07-29 MY MYPI2016702779A patent/MY180087A/en unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101210192B1 (en) | 2003-06-05 | 2012-12-07 | 메탈 코우팅즈 인터내쇼날 인코포레이팃드 | Compositions and methods for darkening and imparting corrosion-resistant properties to zinc or other active metals |
| JP2014080569A (en) * | 2012-09-28 | 2014-05-08 | Kansai Paint Co Ltd | Water-based coating composition and coating film forming method |
Also Published As
| Publication number | Publication date |
|---|---|
| MY180087A (en) | 2020-11-21 |
| KR20170038387A (en) | 2017-04-07 |
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