KR20140045491A - Non chromic acid pre-treatment agent composite and method of mamufacturing uncombustible color steel sheet using the same - Google Patents
Non chromic acid pre-treatment agent composite and method of mamufacturing uncombustible color steel sheet using the same Download PDFInfo
- Publication number
- KR20140045491A KR20140045491A KR1020140036847A KR20140036847A KR20140045491A KR 20140045491 A KR20140045491 A KR 20140045491A KR 1020140036847 A KR1020140036847 A KR 1020140036847A KR 20140036847 A KR20140036847 A KR 20140036847A KR 20140045491 A KR20140045491 A KR 20140045491A
- Authority
- KR
- South Korea
- Prior art keywords
- weight
- steel sheet
- chromic acid
- color steel
- epoxy
- Prior art date
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
- C23C22/08—Orthophosphates
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
- C23C2222/20—Use of solutions containing silanes
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
By applying the water-soluble low-volatile non-chromic acid pretreatment agent, the primer layer and the undercoat coating layer can be omitted, and the eco-friendly aqueous non-chromic acid type which can improve physical properties such as excellent corrosion resistance, processability, impact resistance, and coating film adhesion A pretreatment composition and a method for producing a nonflammable color steel sheet using the same are disclosed.
The non-chromic acid pretreatment composition according to the present invention is polyester resin: 50 to 60% by weight, epoxy binder: 1 to 3% by weight, epoxy-based phosphate compound: 2 to 10% by weight, corrosion inhibitor: 0.5 to 2.0% by weight, collie Id silica: 20 to 30% by weight, additives: 1.0% by weight and the remaining solvent is characterized in that the composition.
Description
The present invention relates to a non-chromic acid pretreatment composition and a method for producing a non-flammable color steel sheet using the same, and more particularly, by applying a water-soluble low-volatile non-chromic acid pretreatment agent, it is possible to omit the undercoat layer, but also excellent corrosion resistance, processability, The present invention relates to a non-chromic acid pretreatment composition of an environmentally friendly aqueous type capable of improving physical properties such as impact properties and coating film adhesion, and a method for producing a nonflammable color steel sheet using the same.
In the case of color steel sheets, the demand for building materials, home appliances, and automobiles is increasing. In particular, domestic and foreign cold-rolled product manufacturers and other steel-based surface treatment companies that produce hot-dip galvanized steel and electro-galvanized steel are subjected to chemical treatment such as chromate treatment and phosphate treatment. To produce a product.
Among them, chromate treatment refers to coating a rust preventive film by putting a steel plate in a solution mainly containing chromic acid or dichromate. This chromate treatment is an inexpensive treatment step that gives the steel sheet excellent corrosion resistance and coating film density.
However, since chromium is a representative pollutant and causes serious damage to workers and the environment, regulatory laws have been enacted in developed countries and implementation is being carried out worldwide.
In addition, in the case of chromate-treated steel sheets, hexavalent chromium (Cr +6 ) is generated as wastewater in the process, and thus, wastewater treatment is costly and time-consuming, and its use will soon be banned in accordance with international chrome usage regulations. As it is known, research on chromate has not been carried out until now, and researches to develop materials to replace chromium are being actively conducted worldwide.
Therefore, in recent years, the use of chromium-type pretreatment is limited due to environmental regulations, it is necessary to develop a technology that can replace it.
Related prior arts are Korean Patent Registration No. 10-0503164 (July 21, 2005).
An object of the present invention is to apply a water-soluble low-volatile non-chromic acid pretreatment agent, an environmentally friendly aqueous type non-chromic acid pretreatment composition that can improve the physical properties such as excellent corrosion resistance, processability, impact resistance, coating film adhesion, while omission of the undercoat layer And it provides a non-combustible color steel sheet manufacturing method using the same.
Non-chromic acid pretreatment composition according to an embodiment of the present invention for achieving the above object is a polyester resin: 50 to 60% by weight, epoxy binder: 1 to 3% by weight, colloidal silica: 20 to 30% by weight, epoxy-based Phosphoric acid compound: 2 to 10% by weight, silane coupling agent: 0.5 to 1.0% by weight, anticorrosive: 0.5 to 2.0% by weight, additives: 1.0% by weight and the remaining solvents.
Non-combustible color steel sheet manufacturing method according to an embodiment of the present invention for achieving the above object comprises the steps of (a) applying a non-chromic acid pretreatment on the base steel sheet, the first heat drying to form a pretreatment layer; And (b) coating the top coat with a spray coating method on the pretreatment layer, followed by secondary heat drying to form a top coat layer.
Non-chromic acid pretreatment composition according to the present invention and non-flammable color steel sheet manufacturing method using the same is a water-soluble type by using a non-chromic acid pretreatment with a very small amount of volatile organic compounds (VOC), an additional coating treatment with an eco-friendly coating By coating the top coat layer directly on the pretreatment layer by spray-squeezing or dipping without the need to implement the coating layer, the coating layer is omitted, yet excellent corrosion resistance, processability, The appearance quality can be improved by improving the leveling property of the paint while securing impact properties and coating film adhesion.
In addition, the non-chromic acid pretreatment composition according to the present invention and the method of manufacturing a non-flammable color steel sheet using the same, the undercoat layer is omitted, and the thickness of the pretreatment layer is 0.5 to 2.0㎛, while having a very thin thickness specific to the pretreatment agent for ceramic paints. Because of the physical properties, it is possible to minimize the amount of the non-chromic acid pretreatment composition has the advantage of being economic.
1 is a schematic cross-sectional view of a non-combustible color steel sheet according to an embodiment of the present invention.
2 is a process flowchart showing a method for manufacturing a non-flammable color steel sheet according to an embodiment of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.
Hereinafter, with reference to the accompanying drawings, a non-chromic acid pretreatment composition according to a preferred embodiment of the present invention and a non-flammable color steel sheet manufacturing method using the same will be described in detail.
Non-Chromic Acid Pretreatment Composition
Non-chromic acid pretreatment composition according to an embodiment of the present invention is a polyester resin: 50 to 60% by weight, epoxy binder: 1 to 3% by weight, colloidal silica: 20 to 30% by weight, epoxy-based phosphate compound: 2 to 10 % By weight, silane coupling agent: 0.5 to 1.0% by weight, corrosion inhibitor: 0.5 to 2.0% by weight and additives: 1.0% by weight.
At this time, the non-chromic acid pretreatment composition according to an embodiment of the present invention is made of a solvent such as distilled water, deionized water, etc. other than the above components, may contain a small amount of impurities inevitably incorporated in the manufacturing process.
Polyester resin
The polyester resin serves as a binder as a main component of the non-chromic acid pretreatment composition. It is preferable to use these polyester resins whose molecular weight is 100,000 or more.
The polyester resin is preferably added in a content ratio of 50 to 60% by weight of the total weight of the non-chromic acid pretreatment composition according to the present invention. When the amount of the polyester resin is less than 50% by weight, the composition for coating may be diluted and may not be easy to dry and use. On the contrary, when the amount of the polyester resin added exceeds 60% by weight, there is a problem that the curing characteristics are lowered, or the leveling property is lowered by increasing the curing time and increasing the concentration.
Epoxy binder
An epoxy binder is added for the purpose of improving adhesiveness. It is preferable to use an epoxy resin as such an epoxy binder.
The epoxy binder is preferably added in an amount of 1 to 3% by weight of the total weight of the non-chromic acid pretreatment composition according to the present invention. If the added amount of the epoxy binder is less than 1% by weight, it may be difficult to properly exhibit the above effects. On the contrary, when the addition amount of an epoxy binder exceeds 3 weight%, there exists a problem that heat resistance falls.
Colloidal silica
Colloidal silica contributes to hardness and corrosion resistance. Such colloidal silica is preferably used having an average diameter of 5 ~ 15nm, since it can be atomized into a colloidal form to be stabilized in the solvent.
The colloidal silica is preferably added in an amount of 20 to 30% by weight of the total weight of the non-chromic acid pretreatment composition according to the present invention. If the amount of colloidal silica is less than 20% by weight, it may be difficult to properly exhibit the effect of improving hardness and corrosion resistance. On the contrary, when the addition amount of colloidal silica exceeds 30 weight%, it becomes difficult to form a top coat film, or there exists a problem that workability worsens by the adhesiveness fall of a coating film. In particular, the polyester resin and colloidal silica are preferably added in a ratio of 1.5: 1 to 2.5: 1.
Epoxy Phosphate Compound
Epoxy-based phosphate compound improves the adhesion of the coating film by activating the surface etching and epoxy groups and also improves the corrosion resistance. As the epoxy-based phosphate compound, any one selected from 1-hydroxyethylene-1,1-diphosphonic acid, ammonium phosphate, sodium monophosphate, sodium diphosphate, sodium triphosphate and zinc phosphate may be used.
The epoxy-based phosphate compound is preferably added in a content ratio of 2 to 10% by weight of the total weight of the non-chromic acid pretreatment composition according to the present invention. If the added amount of the epoxy-based phosphate compound is less than 2% by weight, it may be difficult to properly exhibit the effect of improving the corrosion resistance since the added amount is insignificant. On the contrary, when the added amount of the epoxy-based phosphate compound exceeds 10% by weight, it is not economical because it acts as a factor to increase the manufacturing cost without any further effect.
Silane coupling agent
The silane coupling agent serves to increase the crosslinking force and to improve adhesion.
The silane coupling agent is preferably added in a content ratio of 0.5 to 1.0% by weight of the total weight of the non-chromic acid pretreatment composition. When the amount of the silane coupling agent added is less than 0.5% by weight, the adhesion may be inferior. On the contrary, when the amount of the silane coupling agent added exceeds 1.0 wt%, the viscosity may not be evenly applied to the surface of the steel sheet due to the viscosity increase, and the surface treatment characteristics may be deteriorated.
Examples of the silane coupling agent include 3-aminopropyltriepoxysilane, N, N-bis [3- (trimethoxysilyl) propyl] ethylenediamine, N- (β-aminoethyl) -γ-aminopropylmethyldimethoxysilane, N- [2- (vinylbenzylamino) ethyl] -3-aminopropyltrimethoxysilane, N- (1,3-dimethylbutylidene) -3- (triepoxysilane) -1-propanamine, 3- One selected from glycidoxypropyltrimethoxysilane, 3-methaglycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, γ-glycidoxy trimethyl dimethoxysil, and the like can be used.
Anticorrosion
Corrosion resistance improves hardness and corrosion resistance. As the corrosion inhibitor, one or more selected from titanium sol, silica sol, zirconium sol and the like may be used, but it is more preferable to use a titanium sol.
The corrosion inhibitor is preferably added in an amount ratio of 0.5 to 2.0% by weight of the total weight of the non-chromic acid pretreatment composition according to the present invention. If the amount of the corrosion inhibitor is less than 0.5% by weight, it may be difficult to properly exhibit the effect of improving hardness and corrosion resistance. On the contrary, when the addition amount of a corrosion inhibitor exceeds 2.0 weight%, coating film formation may become difficult or the adhesiveness of a coating film may fall.
Other additives
Other additives may be added to the non-chromic acid pretreatment composition according to the present invention. Such additives may be further added at least one selected from a leveling agent, an antifoaming agent, and the like, and the additives are preferably added in an amount ratio of 1.0 weight or less of the total weight of the non-chromic acid pretreatment composition according to the present invention.
The non-chromic acid pretreatment composition according to the embodiment of the present invention is a water-soluble type because it has very few volatile organic compounds (VOCs), which enables eco-friendly coating, and has a structure in which the undercoat layer is omitted and has excellent corrosion resistance. In addition to ensuring workability, impact resistance, coating adhesion, and the like, the appearance quality can be improved by improving the leveling property of the coating material.
Manufacturing method of incombustible color steel plate
Hereinafter, the non-combustible color steel sheet manufacturing method according to an embodiment of the present invention to be described in more detail.
1 is a cross-sectional view schematically showing a non-flammable color steel sheet according to an embodiment of the present invention, Figure 2 is a process flow chart showing a method for manufacturing a non-flammable color steel sheet according to an embodiment of the present invention.
1 and 2, the method for manufacturing a non-flammable color steel sheet according to the embodiment of the present invention includes a pretreatment layer forming step S210 and a top coat layer forming step S220.
Formation of pretreatment layer
In the pretreatment layer forming step (S210), after applying the non-chromic acid pretreatment agent on the
At this time, the non-chromic acid pretreatment composition is polyester resin: 50 to 60% by weight, epoxy binder: 1 to 3% by weight, colloidal silica: 20 to 30% by weight, epoxy phosphate compound: 2 to 10% by weight, silane coupler Ring agent: 0.5 to 1.0% by weight, corrosion agent: 0.5 to 2.0% by weight and additives: 1.0% by weight.
In addition, the non-chromic acid pretreatment composition is made of a solvent such as distilled water, deionized water, etc. in addition to the above components, and may contain a small amount of impurities inevitably incorporated in the manufacturing process.
In this case, the coating of the non-chromic acid pretreatment may be performed by one or more of spray-squeezing, roll coating, and dipping methods, and using the roll coating method. More preferred.
The
The
In particular, the
In this step, the first heat drying temperature (Peak Metal Temperture: PMT) is preferably carried out at 160 ~ 200 ℃ conditions. If the primary heat drying temperature is less than 160 ℃ drying may not be completed completely, workability may be reduced. On the contrary, when the primary heat drying temperature exceeds 200 ° C., the adhesion between the
Top coat layer formation
In the top coat layer forming step (S220), after coating the top coat with a spray coating method on the
At this time, the top coat is a composition composed of 40 to 50% by weight of polyester resin, 5 to 6% by weight of melamine cured resin, pigment 20 to 30% by weight, solvent 10 to 20% by weight and additives 10 to 20% by weight. Can be.
In this case, at least one selected from TiO 2 , antimony (Sb), carbon (C), iron oxide and silicon (Si) may be used as the pigment, and at least one selected from hydrocarbon and cyclonucleic acid may be used as the solvent. As an additive, at least one selected from acrylic, urethane, and epoxy may be used.
The
In this step, the top coat coating may be performed by one or more of spray squeezing, roll coating, and dipping, and double spray-squeezing. It is preferable to use. As such, when the top coat is coated by the spray-squeegeeing method, the manufacturing process may be simplified by applying the spray process to improve the production yield.
At this time, the secondary heat drying temperature (Peak Metal Temperture: PMT) is preferably carried out under 200 ~ 250 ℃ conditions. If the secondary heat drying temperature is less than 200 ℃ can not cause a sufficient curing reaction can lead to a decrease in physical properties. On the contrary, when the secondary heat drying temperature exceeds 250 ° C., abnormal surface drying may cause a decrease in surface quality due to a decrease in coating film adhesion. At this time, the drying is preferably carried out by at least one of hot air heating method, induction heating method and near-infrared heating method.
The non-combustible color steel sheet produced by the above process (S210 ~ S220) is a water-soluble type, which uses a non-chromic acid pretreatment that is very low in volatile organic compounds (VOCs), thereby performing separate undercoat with an eco-friendly coating. By coating the top coat layer on the pretreatment layer directly by spray squeezing or dipping method without having to do so, it has a structure in which the undercoat layer is omitted, yet excellent corrosion resistance, processability, impact resistance, coating film Not only the adhesiveness can be secured but also the appearance quality can be improved by improving the leveling property of the paint.
In addition, the non-combustible color steel sheet produced by the method according to the present invention, the undercoat layer is omitted, and the thickness of the pretreatment layer is 0.5 ~ 2.0㎛, while having a very thin thickness and has the specific properties of the pretreatment agent for ceramic paints, It is economical because the amount of the chromic acid pretreatment composition can be minimized.
Example
Hereinafter, the configuration and operation of the present invention will be described in more detail with reference to preferred embodiments of the present invention. It is to be understood, however, that the same is by way of illustration and example only and is not to be construed in a limiting sense.
Details that are not described herein will be omitted since those skilled in the art can sufficiently infer technically.
1. Preparation of Color Steel Specimen
Example 1
On a galvanized steel sheet, polyester resin: 54 wt%, epoxy resin: 2 wt% colloidal silica: 25 wt%, ammonium phosphate: 3.0 wt%, 3-aminopropyltriepoxysilane: 1.5 wt%, titanium sol: 0.5 wt%, The non-chromic acid pretreatment composition, which is composed of 1 wt% and the remaining water by the addition of the leveling agent and the antifoaming agent as the other additives, was applied to a thickness of 0.3 μm, and then dried first at 160 ° C. to form a pretreatment layer.
Next, after coating a coating composition composed of 45wt% of polyester resin, 5wt% of melamine cured resin, 25wt% of TiO 2 , 18wt% of hydrocarbon and 17% of urethane resin on the pretreatment layer, it was heated at 200 ° C. for 2 hours. It was dried to form a top coat layer of 21㎛ thickness to prepare a color steel specimen.
Example 2
Polyester resin: 52 wt%, epoxy resin: 2.5 wt% colloidal silica: 27 wt%, ammonium phosphate: 6.0 wt%, 3-aminopropyltriepoxysilane: 2.0 wt%, titanium sol: 1.5 wt%, leveling agent with other additives And the color steel sheet specimens were prepared in the same manner as in Example 1 except that the non-chromic acid pretreatment composition composed of 1wt% and the remaining water by the sum of the antifoaming agent was applied to a thickness of 0.5㎛.
Example 3
Polyester resin: 57 wt%, epoxy resin: 2.2 wt% colloidal silica: 23 wt%, ammonium phosphate: 8.0 wt%, 3-aminopropyltriepoxysilane: 2.5 wt%, titanium sol: 1.0 wt%, leveling agent with other additives And a non-chromic acid pretreatment composition composed of 1wt% and the remaining water by the sum of the antifoaming agent was applied to a thickness of 0.7㎛, and the color steel specimen was prepared in the same manner as in Example 1 except that the first heat-drying at 170 ℃. .
Example 4
A color steel specimen was prepared in the same manner as in Example 1 except that the non-chromic acid pretreatment composition was applied at a thickness of 1.0 μm and dried firstly at 170 ° C.
Example 5
A color steel sheet specimen was prepared in the same manner as in Example 1 except that the non-chromic acid pretreatment composition was applied at a thickness of 1.5 μm and dried firstly at 180 ° C.
Example 6
A color steel sheet specimen was prepared in the same manner as in Example 1 except that the non-chromic acid pretreatment composition was applied to a thickness of 2.0 μm and dried firstly at 200 ° C.
Comparative Example 1
A color steel specimen was prepared in the same manner as in Example 1 except that the non-chromic acid pretreatment composition was applied to a thickness of 2.5 μm and dried firstly at 180 ° C.
2. Property evaluation method
Physical properties evaluation method of the color steel sheet specimens prepared according to Examples 1 to 6 and Comparative Example 1 are as follows.
(1) Glossiness
For gloss evaluation, the gloss of the specimen was measured at an incident angle of 60 ° using a gloss meter (Tri-Microgloss-20-60-85, Sheen Instruments Ltd., England).
(2) corrosion resistance
Corrosion resistance evaluation was performed after 350 hours of neutral salt spray test to confirm the coating peeling, lifting, plating surface corrosion, rust generation. The evaluation criteria are as follows.
Good (O): No peeling, lifting, plating surface corrosion and rust
Poor (X): Peeling, lifting, plating surface corrosion or rust
(3) impact resistance
Impact resistance was evaluated for cracking after surface impact under a condition of 1 / 2φ × 1kg × 500mm.
Good (O): No crack
Poor (X): Cracks
(4) Processability
Machinability was tested by T-bending test to determine whether cracks occurred at twice the bending thickness of the specimen.
Good (O): No crack
Poor (X): Cracks
(5) Coating Hardness
The coating hardness evaluation was evaluated by rubbing 50 times with 1kgf force after applying MEK to gauze, and then peeling and swelling of resin.
Good (O): No resin peeling or swelling
Poor (X): resin peeling or swelling
(6) Pencil Hardness
The pencil hardness used the uni pencil (made by Mitsubishi Corporation, Japan).
(7) Coating film adhesion (adhesiveness)
Coating adhesion is cross-cutting by 10 rows at the interval of 1mm in width x length on the flat sample coated with paint to make 100 squares with an area of 1mm 2, and then cross-cut to 6mm in height. ) Spherical processing (Ericsson processing) was carried out on the flat plate portion, and when the adhesive tape was finally attached and then peeled off to 100 coating film particles was evaluated as follows.
Good (O): No peeling of the coating film particles of the cross cutting part
Poor (X): Peeling of the coating film particles of the cross cutting part
3. Property evaluation
Table 1 shows the results of physical properties evaluation for the specimens according to Examples 1 to 5 and Comparative Example 1.
[Table 1]
Referring to Table 1, in the case of the specimens according to Examples 1 to 5, it was confirmed that the corrosion resistance, impact resistance, processability, coating film hardness, pencil hardness and coating film adhesion meet all of the target property values. In particular, in the case of the specimens according to Examples 1 to 6, the pencil hardness was all measured by 2H, the glossiness was measured by 90 ~ 94.
On the other hand, in the case of the specimen according to Comparative Example 1, the thickness range of the non-chromic acid pretreatment composition is out of the range suggested by the present invention, the corrosion resistance, processability, coating hardness and pencil hardness satisfy the target physical property values, but the glossiness Was measured as 89, and it was confirmed that the impact resistance and the coating film adhesion were poor.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. Such changes and modifications are intended to fall within the scope of the present invention unless they depart from the scope of the present invention. Accordingly, the scope of the present invention should be determined by the following claims.
100: non-flammable color steel sheet 120: base steel sheet
140: pretreatment layer 160: top coat layer
S210: Pre-treatment layer formation step
S220: top coat layer forming step
Claims (8)
Epoxy binder: 1-3 wt%,
Colloidal silica: 20-30% by weight,
Epoxy Phosphate Compound: 2 ~ 10 wt%
Silane coupling agent: 0.5-1.0 wt%,
Anticorrosive: 0.5-2.0 wt%,
Additive: Bichromic acid pretreatment composition, characterized in that the composition is composed of 1.0% by weight and the remaining solvent.
The polyester resin and the colloidal silica
Non-chromic acid pretreatment composition, characterized in that it is added in a ratio of 1.5: 1 to 2.5: 1.
The epoxy-based phosphate compound
A non-chromic acid pretreatment composition comprising at least one selected from 1-hydroxyethylene-1,1-diphosphonic acid, ammonium phosphate, sodium monophosphate, sodium diphosphate, sodium triphosphate, and zinc phosphate.
(b) coating a top coat with a spray coating method on the pretreatment layer, followed by secondary heat drying to form a top coat layer; and a nonflammable color steel sheet manufacturing method comprising a.
In the step (a)
The non-chromic acid pretreatment agent
Polyester resin: 50 to 60% by weight, epoxy binder: 1 to 3% by weight, colloidal silica: 20 to 30% by weight, epoxy phosphate compound: 2 to 10% by weight, silane coupling agent: 0.5 to 1.0% by weight, Anticorrosive: 0.5 to 2.0% by weight, additives: 1.0% by weight and the method of producing a non-flammable color steel sheet, characterized in that it is composed of the remaining solvent.
The pretreatment layer is
Non-flammable color steel sheet manufacturing method characterized by having a thickness of 0.5 ~ 2.0㎛.
In the step (a)
The first heat drying temperature (Peak Metal Temperture: PMT) is
Non-combustible color steel sheet manufacturing method characterized in that carried out at 160 ~ 200 ℃ conditions.
In the step (b)
The secondary heat drying temperature (Peak Metal Temperture: PMT)
Non-combustible color steel sheet manufacturing method characterized in that carried out at 200 ~ 250 ℃ conditions.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020140036847A KR20140045491A (en) | 2014-03-28 | 2014-03-28 | Non chromic acid pre-treatment agent composite and method of mamufacturing uncombustible color steel sheet using the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020140036847A KR20140045491A (en) | 2014-03-28 | 2014-03-28 | Non chromic acid pre-treatment agent composite and method of mamufacturing uncombustible color steel sheet using the same |
Publications (1)
Publication Number | Publication Date |
---|---|
KR20140045491A true KR20140045491A (en) | 2014-04-16 |
Family
ID=50652916
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020140036847A KR20140045491A (en) | 2014-03-28 | 2014-03-28 | Non chromic acid pre-treatment agent composite and method of mamufacturing uncombustible color steel sheet using the same |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR20140045491A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20150137623A (en) * | 2014-05-30 | 2015-12-09 | 현대제철 주식회사 | Color steel sheet and method of manufacturing the same |
-
2014
- 2014-03-28 KR KR1020140036847A patent/KR20140045491A/en not_active Application Discontinuation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20150137623A (en) * | 2014-05-30 | 2015-12-09 | 현대제철 주식회사 | Color steel sheet and method of manufacturing the same |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR101499361B1 (en) | Uncombustible color steel sheet for household appliances and bulding materials and mehtod of mamufacturing the same | |
JP4537377B2 (en) | Method for coating a metal surface with a polymer-rich composition | |
JP5332424B2 (en) | Black painted steel plate, processed product and flat panel TV | |
US20120328786A1 (en) | Metal surface treatment solution and method of manufacturing steel sheet using the same | |
JP5833871B2 (en) | Manufacturing method of painted metal plate | |
KR20110117070A (en) | Surface treatment agent for galvanized steel sheet, galvanized steel sheet and production method thereof | |
KR101174584B1 (en) | Method for manufacturing antibiotic color steel sheets | |
KR100787737B1 (en) | Cr-free coating material for galvaneeled steel sheet representing excellent in adhesion to paints and corrosion resistance and a process for producing cr-free coated steel sheet using the coating material | |
JP5126548B2 (en) | Coated steel sheet and electronic equipment casing using the same | |
JP2012214676A (en) | Coated metal plate and method of manufacturing the same | |
JP5176890B2 (en) | Coated steel sheet and casing for electronic equipment using the same | |
JP4873974B2 (en) | Pre-coated metal plate and manufacturing method thereof | |
KR20140045491A (en) | Non chromic acid pre-treatment agent composite and method of mamufacturing uncombustible color steel sheet using the same | |
JP5125285B2 (en) | Aluminum coating material and manufacturing method thereof | |
JP5380846B2 (en) | Painted steel with excellent bending workability | |
KR101432170B1 (en) | Cr-free Pretreatment Solution and Manufacturing Method of Coated Steel Sheet Using the Same | |
KR100782640B1 (en) | Chrome free resin composition for good forming properties and surface-treated steel sheet using the same | |
KR101581556B1 (en) | Color steel sheet and method of manufacturing the same | |
CN112159976B (en) | Preparation method of colored steel plate | |
WO2017063513A1 (en) | Passivation not involving chromium, phosphorus and fluoride, and organic film coating | |
JP2015531818A (en) | Organic-inorganic composite coating solution composition and organic-inorganic composite-coated steel sheet | |
KR101584587B1 (en) | Chrome-free composition for treating a steel surface and 2coat-2bake steel sheet manufactured by using the same | |
KR101282570B1 (en) | Method for manufacturing color steel sheets | |
KR20090073908A (en) | Cr-free sealing solution and method of fabricating phosphated electro-galvanized steel sheet using the same | |
KR20150059211A (en) | Self cleaning paint composition having pollution-proof and mehtod of mamufacturing self cleaning color steel sheet using the same |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
E601 | Decision to refuse application |