WO2017099533A1 - 수지 조성물 및 이를 이용한 흑색 수지 강판, 및 그 제조방법 - Google Patents
수지 조성물 및 이를 이용한 흑색 수지 강판, 및 그 제조방법 Download PDFInfo
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- WO2017099533A1 WO2017099533A1 PCT/KR2016/014472 KR2016014472W WO2017099533A1 WO 2017099533 A1 WO2017099533 A1 WO 2017099533A1 KR 2016014472 W KR2016014472 W KR 2016014472W WO 2017099533 A1 WO2017099533 A1 WO 2017099533A1
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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
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- 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
- C09D7/45—Anti-settling agents
-
- 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
- C09D7/47—Levelling agents
-
- 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
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- 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
- C09D7/65—Additives macromolecular
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/26—After-treatment
- C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
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- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
Definitions
- One embodiment of the present invention relates to a resin composition for steel plate surface treatment, a deep colored resin steel plate using the same, and a method of manufacturing the same.
- Black resin steel sheet is a steel sheet applied to the rear cover (rear cover) of various TV displays such as LCD, LED.
- black paint is post-processed in the form of pre-coated metal (PCM), then transported to a processing company, sheared to a size suitable for press inches, and finally transported to a press company.
- PCM pre-coated metal
- common punching oil was applied in the past, and it was easy to secure press formability while continuously going through the processes of pressing, degreasing, washing and drying.
- fast-drying fuel oil having a faster gasoline rate and a lower viscosity than conventional fuel oil is being expanded.
- Quick-drying grease is a non-aqueous water-soluble solvent using a highly volatile solvent such as toluene and xylene in addition to aliphatic hydrocarbons.In addition to the function of cooling the heat generated by friction between the steel sheet and the press die during pressing, It serves as a complement.
- quick-drying lubricating oil has a relatively small lubricating effect compared to conventional lubricating oils, and residual stains occur after the petroleum gasoline, particularly in winter. Therefore, a higher level of self-lubrication of the steel sheet is required, and in particular, technical progress is required to minimize the reaction between the steel sheet and the grease in an environment in which the gasoline is delayed, such as in winter.
- Hot air curing has generally been applied for solution curing after hardening resin coating.
- Hot air hardening is a method of transferring hot air into a hardening furnace to transfer heat to strips, and most domestic and overseas color coated steel sheet manufacturers have applied hot air hardening.
- induction hardening Induct ion heating
- hot air hardening is performed by convection
- induction hardening is a steel plate whose initial heat generation is a heating target, and heat transfer is performed by a conduction method that has a higher heat transfer efficiency than convection.
- Resin composition of one embodiment of the present invention with respect to 100% by weight of the total composition, comprising 40 to 50% by weight of the polyester resin, the polyester resin is composed of a main resin and an auxiliary resin, the main resin is an auxiliary resin Compared with the molecular weight is high, the glass transition silver degree difference between the main resin and the auxiliary resin can provide a resin composition that is 25 ° C or less.
- the main resin may be included in 15 to 50% by weight, the molecular weight of the main resin is more than 15, 000Mn and 80, 000Mn or less, the molecular weight of the auxiliary resin is 12, 000 ⁇ To 20, 000 ⁇ .
- the glass transition silver of the main resin is 5 to 20 ° C
- the glass transition temperature of the auxiliary resin may be 20 to 30 ° C.
- the resin composition may further include 3 to 10% by weight of melamine resin, 1 to 5% by weight of wear resistant particles, 0.01 to 3% by weight of wax, and the balance of the solvent, based on 100% by weight of the total composition.
- the wear resistant particles may comprise polymethyl methacrylate, acrylic, or a combination thereof.
- the wax may comprise polyethylene, polyethylene-polytetrafluoroethylene, or a combination thereof.
- the solvent may comprise propylene glycol methyl ether acetate, ketones, hydrocarbons, dibasic esters, or combinations thereof.
- the resin composition may further include 0.3 to 1.5 wt% of an acid catalyst, 3 to 5 wt% of a pigment, and 2 to 5 wt% of an additive with respect to 100 wt% of the total composition.
- the acid catalyst may be dinonyl naphthalene sulfonic acid.
- the pigment may be in a form in which carbon blocks and titanium oxide are mixed, and the weight ratio of carbon black to titanium oxide may be 1 to 30.
- the additives may include adhesion promoters, leveling agents, dispersants and matting agents.
- the adhesion promoter may comprise a hydroxyl phosphate ester, or a combination thereof.
- the leveling agent may comprise polyacrylate, polysiloxane, or a combination thereof.
- the deep colored resin steel sheet holding steel sheet; A creme-free undercoat film disposed on one side or both sides of the steel sheet; And a coating layer on the chromium free undercoat. It may include,
- carbon (C) 70 to 80% by weight
- silicon (Si) 1 to 4% by weight
- titanium (Ti) 1 to 5% by weight
- residual oxygen (0 ) May be included.
- the wear resistant particles the average particle diameter compared to the thickness of the coating layer
- the particles having an average particle diameter of 1.0 to 2.0 times compared to the thickness of 0.2 to 0.8 times the particle and the coating layer may be mixed.
- the particles having a large average particle diameter of the wear resistant particles may be included in an amount of 60 to 80% by weight based on the total weight of the wear resistant particles.
- the coating layer on the chromium free undercoat may have a thickness of 3 to 20;
- the surface roughness Ra of the coating layer on the creme-free undercoat may be less than one.
- the amount of adhesion of the cream-free undercoat film disposed on one or both surfaces of the steel sheet may be 500 to 2,000 mg / m 2 .
- the base steel sheet may include carbon steel, aluminum steel, aluminum alloy steel, stainless steel, copper steel, galvanized steel sheet, binary or ternary alloy plated steel sheet containing zinc, or a combination thereof.
- Another embodiment of the present invention is a method for producing a black resin steel sheet, comprising: preparing a steel sheet; Forming a creme-free undercoat on one or both surfaces of the base steel sheet; And forming a coating layer on the creme-free undercoat. It may include.
- the coating layer is formed by applying a resin composition, the resin composition, with respect to 100 weight 3 ⁇ 4 of the total composition, 40 to 50% by weight of a polyester resin, the polyester resin is a main resin and Comprising an auxiliary resin, the main resin has a higher molecular weight than the auxiliary resin, the glass transition temperature difference between the main resin and the auxiliary resin can provide a method for producing a black resin steel sheet is less than 25 ° C.
- the main resin may be included in an amount of about 15 wt% to about 50 wt% based on 100 wt% of the polyester resin.
- the molecular weight of the main resin is more than 15, 000Mn and 80, 000Mn or less, the molecular weight of the auxiliary resin may be 12, 000Mn to 20, 000Mn.
- the glass transition temperature of the main resin is 5 to 20 ° C
- the glass transition temperature of the auxiliary resin may be 20 to 30 ° C.
- the steel sheet coated with the composition By, the steel sheet may be heat-treated to 210 to 240 ° C. Forming a chromium free undercoat on one or both surfaces of the base steel sheet; In, the amount of adhesion of the cream-free undercoat may be 500 to 2,000 mg / m 2 .
- the base steel sheet may include carbon steel, aluminum steel, aluminum alloy steel, stainless steel, copper steel, galvanized steel sheet, a binary or ternary alloy plated steel sheet containing zinc or a combination thereof.
- Black resin steel sheet using a resin composition according to an embodiment of the present invention may be excellent in press workability even after the quick-drying oil spray application.
- a black resin steel sheet having high hardness and excellent flexibility can be provided using a resin composition containing a polyester resin containing two kinds of resins having different molecular weights and glass transition temperatures.
- the degree of crosslinking of the steel sheet can be increased.
- Figure 2 shows a schematic view of the coating layer before and after induction curing.
- Figure 3 shows the draw bead evaluation apparatus.
- Resin composition according to an embodiment of the present invention with respect to 100 weight of the total composition, 40 to 50% by weight of the polyester resin, the polyester resin is composed of a main resin and an auxiliary resin, the main resin is auxiliary The molecular weight is higher than that of the resin, and the glass transition temperature difference between the main resin and the auxiliary resin can provide a resin composition that is 25 ° C or less.
- the polyester resin is a main resin and an auxiliary resin
- the molecular weight of the main resin is more than 15, 000Mn and 80,000 ⁇ or less
- the molecular weight of the auxiliary resin may be 12, 000 ⁇ to 20 ⁇ ⁇ .
- the main resin may have a higher molecular weight than the auxiliary resin.
- the glass transition temperature of the main resin may be 5 to 20 ° C
- the glass transition temperature of the auxiliary resin may be 20 to 30 ° C
- the glass transition temperature difference between the main resin and the auxiliary resin may be 25 ° C or less.
- the ura transition temperature means a state transition temperature at which the polymer molecular chains can move freely. More specifically, the lower the glass transition temperature, the lower the hardness is excellent in workability, while the higher the glass transition temperature may be inferior in workability due to the increase in hardness. Therefore, the resin composition according to one embodiment of the present invention is a mixture of two kinds of polyester resins of 'low glass transition temperature-high molecular weight' and 'high glass transition temperature-low molecular weight' to simultaneously achieve excellent hardness, crosslinking degree and flexibility. It can be secured. . ⁇
- the molecular weight of the main resin when the molecular weight of the main resin is small, it may be difficult to secure flexibility and processability due to the short polymer length. In addition, during the coating by using a coating method, pickup may be degraded. On the other hand, when the molecular weight of the main resin is large, the effect of improving workability may be insignificant. In addition, viscosity Due to the increase, the spreadability of the paint may be lowered, but the crosslinking degree may be lowered after curing.
- pick-up refers to the characteristic that the delivery of the dark resin solution is delivered to the applicator by the pick-up, due to the proper viscosity without a break. Therefore, when the pickup properties are excellent, the black resin coating solution can be delivered to the steel sheet without breaking.
- the glass transition temperature of the main resin when the glass transition temperature of the main resin is too low, flexibility may be excellent, but the hardness after the curing can be easily damaged the coating layer.
- the glass transition temperature of the main resin if the glass transition temperature of the main resin is high, the hardness of the coating layer after the hardening may increase rapidly and workability may decrease. Therefore, during Ot-bending, cracks may occur and adhesion may be degraded.
- Ot-bending means the harshest conditions in a bending test for evaluating the workability of a steel sheet. More specifically, since t-bending is determined according to the number of steel sheets that enter between the bending materials, a steel sheet that satisfies the Ot-bending condition means very good workability.
- the pick-up may be lowered during coating.
- the effect of improving workability may be insignificant, and the degree of curing may be reduced.
- the glass transition temperature of the auxiliary resin when the glass transition temperature of the auxiliary resin is too low, the hardness after the curing is low, the coating layer can be easily damaged. On the other hand, when the glass transition temperature of the auxiliary resin is high, the hardness of the coating layer after the curing is sharply increased and workability may be lowered. In addition, during Ot-bending, cracks may occur and adhesion may be degraded.
- the main resin may be included in 15 to 50% by weight
- the auxiliary resin may be included in 50 to 85% by weight.
- the content of the main resin having a high molecular weight and a low glass transition temperature compared to the auxiliary resin is too small, the content of the coating layer after curing Flexibility may be reduced. As a result, coating workability may be reduced.
- the content of the main resin is too large, flexibility may be improved, but corrosion resistance and punching oil washability may be reduced due to the decrease in crosslinking density.
- the punching oil means a press oil used for the purpose of inducing heat generation of a mold when the steel sheet is continuously pressed.
- it refers to press oil applied to the surface of the steel sheet or the press mold for lubrication between the mold and the steel sheet during pressing.
- the resin composition may further include a melamine resin, 3 to 10% by weight, wear resistance particles 1 to 5 parts by weight wax, 0.1 to 3% by weight, and the balance solvent denied based on 100% by weight of the total composition.
- the wear resistant particles may be an acrylic polymer. More specifically, the wear resistant particles may include polymethyl methacrylate, acrylic, or a combination thereof.
- the wear resistant particles serve to improve scratch resistance or wear resistance. More specifically, the melting point of the wear-resistant particles is characterized by higher than the curing temperature of the cream-free undercoat film to be described later. For this reason, the wear resistant particles are present in the form of solid particles even after curing.
- the resin composition will be described below, which is applied to and coated on one or both sides of the base steel sheet including a chromium-free undercoat.
- the wear-resistant particles included in the resin composition may be a mixture of particles having an average particle diameter of 0.2 to 0.8 times the thickness of the coating layer and particles having an average particle diameter of 1.0 to 2.0 times the thickness of the coating layer.
- the size of the wear-resistant particles may vary depending on the thickness of the coating layer on the steel sheet possessing ".
- any one of the wear resistant particles may be black. Even more specifically, particles having a small average particle diameter may be black. Therefore, as compared with the case, the average particle diameter is used only large particles, The phenomenon that the surface portion of the coating layer becomes partially white can be suppressed, and the surface appearance of good quality can be secured.
- the wear resistant particles having a large average particle diameter among the wear resistant particles may be included in an amount of 60 to 80 wt% based on the total weight% of the wear resistant particles.
- the surface roughness may be increased to reduce the surface gloss.
- friction measurement may cause linear peeling at the particle protrusions.
- the wax may comprise polyethylene, polyethylene-polytetrafluoroethylene, or a combination thereof. More specifically, the wax serves to impart lubricity so that the steel sheet can be easily drawn along the shape of the mold during press molding. In addition, the wax has a relatively low specific gravity and serves as a surface injury.
- the weight of the wax is less than the range disclosed herein, the lubricity of the steel sheet after curing may be lowered.
- the amount of wax is increased too much, the effect of improving the lubricity of the steel plate after curing is insignificant, whereas the crosslinking force may be reduced due to the wax wound on the surface, thereby reducing the corrosion resistance.
- reaction with punched oil may be facilitated, and surface defects such as stains may occur when washing.
- the solvent may include propylene glycol methyl ether acetate, ketone hydrocarbon based, dibasic ester, or a combination thereof. However, it is not limited thereto.
- the resin composition is an acid catalyst from 0.3 to 100% by weight of the total composition
- the acid catalyst may include dinonyl naphthalene sulfonic acid, or a combination thereof.
- the acid catalyst is 0.3 to 3% by weight of the total composition ⁇ ,
- the pigment may be in a form in which carbon black and titanium oxide (Ti) are mixed.
- the pigment may be included by 3 to 5% by weight. However, it is not limited thereto.
- the weight ratio of the carbon black to the titanium oxide of the pigment may be 1 to 30. If the weight ratio of carbon black is less than 1, the roughness of the steel sheet may not be exhibited, and the layered concealment effect may not be exhibited. If the weight ratio is more than 30, the increase in the degree of hardness is insignificant while the workability is reduced.
- the pigment serves to impart color and opacity to the coating layer.
- the hiding power of the film-free undercoat coating to be described later is reduced, it may not be possible to secure the surface appearance.
- workability may be reduced.
- the additive may include 2 to 5% by weight, based on 100% by weight of the total composition.
- the additive may include an adhesion promoter, a leveling agent, a dispersant, and a matting agent. More specifically, the adhesion promoter may comprise a hydroxyl phosphate ester, or a combination thereof.
- the leveling agent may include polyacrylate, polysiloxane, or a combination thereof. However, it is not limited thereto.
- the dispersant may include an acrylic polymer dispersant, a urethane polymer dispersant, or a combination thereof.
- the dispersant serves to disperse the atomized pigment to prevent puncture.
- the quencher may comprise amorphous silica.
- the quencher serves to reduce gloss through surface diffuse reflection induction. Therefore, the content can be adjusted according to the desired degree of gloss.
- Black resin steel sheet according to another embodiment of the present invention the steel sheet; A creme-free undercoat film disposed on one side or both sides of the steel sheet; And a coating layer located on the chromium free-undercoat film. Including, the coating layer is based on 100% by weight of the total elemental composition of the coating, carbon (C): 70 to 80% by weight, silicon (Si): 1 to 4% by weight, titanium (Ti): 1 to 5% by weight It is possible to provide a black resin steel sheet which is% and the balance of oxygen (0).
- the base steel sheet may include carbon steel, aluminum steel, aluminum alloy steel, stainless steel, copper steel, galvanized steel sheet, binary or ternary alloy plated steel sheet containing zinc, or a combination thereof.
- the present invention is not limited thereto.
- a film-free undercoat may be located on one or both surfaces of the base steel sheet. More specifically, the adhesion amount of the chromium-free undercoat film disposed on one side or both sides of the base steel sheet may be 500 to 2,000 mg / m 2 .
- the coating layer may be located on one or both surfaces of the chromium free undercoat.
- the thickness of the coating layer located on the creme-free undercoat may be 3 to 20.
- the thickness of the coating layer is too thin, corrosion resistance, scratch resistance may be lowered.
- the whiteness (L value) may increase due to the decrease in hiding power of the chromium free undercoat.
- the thickness of the coating layer is too thick, the curing efficiency is lowered, productivity may be reduced, and resistance such as sticking and blocking may be lowered.
- the whiteness means that the X, y, and z axes of the three-dimensional space have a total of six axes in the positive direction and the negative direction, and display the color of the steel sheet through the derived values. I mean. More specifically, the closer to 100 in the z-axis direction, the closer the color of the steel sheet is to white, the larger the positive value in the X-axis direction, the closer to red, and the larger the positive value in the y-axis direction to (yellow). Means that .
- the surface roughness Ra of the coating layer positioned on the chromium free undercoat may be less than 1 GPa.
- the surface roughness of the coating layer is large, the surface glossiness may be lowered due to the promotion of diffuse reflection, and thus the surface quality may be reduced, and the surface texture may be rough.
- the base steel sheet having a coating layer formed of the resin composition may have a surface glossiness of 10 to 40.
- Method for producing a black resin steel sheet preparing a steel sheet; Forming a cream-free undercoat on one or both surfaces of the base steel sheet; And forming a coating layer on the chromium free undercoat.
- preparing a steel sheet Forming a cream-free undercoat on one or both surfaces of the base steel sheet; And forming a coating layer on the chromium free undercoat.
- the coating layer is formed by applying a resin composition
- the resin composition includes 40 to 50% by weight of polyester resin, based on 100 wt.% Of the total composition, wherein the polyester resin is composed of a main resin and an auxiliary resin, and the main resin has a molecular weight in comparison to the auxiliary resin. It is high, the glass transition temperature difference between the main resin and the auxiliary resin can provide a deepening resin sheet manufacturing method that is 25 ° C or less.
- the steel sheet is carbon steel, aluminum steel, aluminum alloy steel, stainless steel, copper steel, galvanized steel sheet, zinc. It may include a binary or ternary alloy plated steel sheet or a combination thereof. However, it is not limited thereto.
- forming a coating layer on the chromium-free undercoat ⁇ coating the composition on the creme free undercoat; Curing the steel sheet coated with the composition; And washing and drying the hardened steel sheet; It may include.
- the base steel sheet may be heat-treated to 210 to 240 ° C.
- the heat treatment may be heat treatment by an induction curing apparatus.
- the deposition amount of the galvanized layer in the galvanized steel sheet is 20g / m 2 .
- One surface of the galvanized steel sheet was coated, cured, washed, and dried to form a creme-free undercoat.
- the adhesion amount of the chromium free undercoat is l, 000 mg / m 2 .
- a resin composition was prepared as shown in Table 1 below. After coating the resin composition on the galvanized steel sheet having the chromium-free undercoat, a peak metal temperature of 232 ° C. was obtained by using an induct ion heating device. It cured, it washed with water, and it dried, and produced the deep resin steel plate.
- the thickness of the dried coating layer is 10.
- Example 2 is a poly resin having a molecular weight of 23,000Mn and a 22.5g main resin having a glass transition temperature of 7 ° C. and a 22.5g auxiliary resin having a molecular weight of 12,000Mn and a glass transition temperature of 20 ° C. Ester resin was used. A black resin steel sheet was manufactured under the same conditions as in Example 1 except for the polyester resin.
- Example 3
- Example 3 used a wax composed of polyethylene-polytetrafluoroethylene 3 ⁇ 4.
- a black resin steel sheet was manufactured under the same conditions as in Example 1 except for the wax.
- Example 4
- Example 4 Compared with Example 1, Example 4 used a wax composed of 2 g of polyethylene.
- a black resin steel sheet was manufactured under the same conditions as in Example 1 except for the wax.
- Example 5 A black resin steel sheet was manufactured under the same conditions as in Example 1 except for the wax.
- Example 5 had a poly resin having a molecular weight of 23, 000 Mn and 25 g of a main resin having a glass transition temperature of 7 ° C. and a 25 g of a secondary resin having a molecular weight of 12, 000 Mn and a glass transition temperature of 20 ° C. Ester resin was used and 30 g of solvent was used.
- a black resin steel sheet was manufactured under the same conditions as in Example 1 except for the polyester resin and the solvent. Comparative Example 1
- Comparative Example 1 used a wax composed of 0.01 g of polyethylene, 0.1 g of polyethylene-polytetrafluoroethylene, and 1.7 g of liquid silicone.
- a black resin steel sheet was manufactured under the same conditions as in Example 1 except for the wax.
- Comparative Example 2 Compared with Example 1, Comparative Example 2 produced a chromium-free undercoat coating amount of 2 ⁇ 500 mg / m 2 .
- a black resin steel sheet was manufactured under the same conditions as in Example 1 except for the chromium-free undercoat coating amount. Comparative Example 3
- Comparative Example 3 contained 2g and lg of particles having an average particle diameter of 15 and 20, respectively.
- a black resin steel sheet was manufactured under the same conditions as in Example 1 except that the above wear resistant particle conditions were different. Comparative Example 4
- Comparative Example 4 used a polyester resin having a molecular weight of 19, 000 and a glass transition temperature of 10 ° C. Example except that the polyester resin conditions were different
- a black resin steel sheet was prepared under the same conditions as 1. Comparative Example 5
- Comparative Example 5 used a polyester resin having a molecular weight of 12, 000 and a glass transition temperature of 20 ° C.
- the deep-colored resin steel plate was manufactured on the same conditions as Example 1 except the polyester resin conditions were changed. Comparative Example 6
- Comparative Example 6 is a polyester resin of 20g resin having a molecular weight of 12, 000 and a glass transition temperature of 5 ° C and 25g resin having a molecular weight of 10, 000 and a glass transition temperature of 35 ° C. Was used.
- a black resin steel sheet was manufactured under the same conditions as in Example 1 except for the polyester resin.
- the friction coefficient of the black resin steel plate surface was evaluated by the friction tester.
- the coefficient of friction was measured after shearing the black resin sheet specimens to 148 ⁇ 290 mm. It measured on the conditions of the pressing force of 600 kgf and the moving speed of 3.3 mm / s.
- the friction coefficient after the application of the punched oil was compared to confirm the influence of the coefficient of friction by the quick-drying the oil.
- the fast-drying fuel oil used MVP 840TW non-aqueous plasticizer of VS & Ein Chemical Co., Ltd.
- the friction coefficient was defined as the average value of the friction coefficient in the 45 ⁇ 185mm section based on the total travel distance of 190mm. In the friction coefficient evaluation experiment, the smaller the coefficient of friction and the more parallel the moving distance, the better. More specifically, ⁇ (very good, less than 0.09), 0 (excellent, 0.09-0.11), ⁇ (usually 0 ⁇ 11 to 0.13), X (inadequate, greater than 0.13 or peeling) The evaluation results are shown in Table 2 below.
- the boiling resistance was evaluated using the black resin steel plate manufactured by the said Example and the comparative example. After immersing the steel plate in boiling water for 2 hours and checking the degree of surface change, if the surface hardening ability is inferior, boiling water may penetrate into the coating layer and cause serious changes in the surface such as blister (coating layer swelling phenomenon). .
- the specimen can be separated when the finger is lightly pushed on it.
- 2 points Separation can only be done using Spatula or similar instruments 0 point: If a device corresponding to 2 points is used but is not separable, the sticking resistance evaluation is based on whether or not the black surface and the non-black surface are pressed together by mutual reaction in the process of transporting the black resin steel sheet in the coil winding state. How to evaluate the degree.
- Bead is a part that holds the material during press molding and catches the material being sucked in.
- the shearing process is sheared, but if damage such as scratches, peeling, etc. in the bead portion coating film, the peeling material is transferred to the mold to cause defects such as dents in the subsequent work material. Therefore, by simulating this in advance through this evaluation, it is possible to determine whether or not stable press continuous work is possible.
- shearing to a size of 44 X 250mm as shown in Figure 3 was evaluated under the conditions of drawing length 90 ⁇ , pressurized load 100kgf. After each evaluation, the mold was cleaned with 2000 grit sandpaper and washed with alcohol to minimize the impact of the previous evaluation material.
- the fast-drying fuel oil used MVP 840TW water-insoluble plasticizer of VS & Ein Chemical Co., Ltd.
- the evaluation method is divided into ⁇ (excellent, less than 0.34) ⁇ ⁇ (usually, 0.34 or more and less than 0.36), X (inadequate, 0.36 or more, or bead delamination) according to the drawing load divided by the pressure lowering.
- ⁇ excellent, less than 0.34
- ⁇ ⁇ usually, 0.34 or more and less than 0.36
- X inadequate, 0.36 or more, or bead delamination
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Abstract
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Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018529263A JP6868624B2 (ja) | 2015-12-09 | 2016-12-09 | 樹脂組成物およびこれを用いた黒色樹脂鋼板、およびその製造方法 |
| US16/061,142 US11066573B2 (en) | 2015-12-09 | 2016-12-09 | Resin composition, black resin coated steel sheet using same, and method of preparing same |
| CN201680072319.2A CN108603014B (zh) | 2015-12-09 | 2016-12-09 | 树脂组合物、利用该树脂组合物的黑色树脂钢板及其制造方法 |
| MX2018007003A MX2018007003A (es) | 2015-12-09 | 2016-12-09 | Composición de resina, lámina de acero recubierta con resina negra que usa la misma y método de preparación de la misma. |
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| KR1020150175376A KR101762340B1 (ko) | 2015-12-09 | 2015-12-09 | 수지 조성물 및 이를 이용한 흑색 수지 강판, 및 그 제조방법 |
| KR10-2015-0175376 | 2015-12-09 |
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| JP (1) | JP6868624B2 (ko) |
| KR (1) | KR101762340B1 (ko) |
| CN (1) | CN108603014B (ko) |
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| KR101977505B1 (ko) * | 2017-12-20 | 2019-05-10 | 주식회사 포스코 | 수지 조성물, 이를 이용한 흑색 수지 강판, 및 그 제조방법 |
| KR102340545B1 (ko) * | 2019-10-02 | 2021-12-20 | 주식회사 케이씨씨 | 클리어 도료 조성물 |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2019505608A (ja) | 2019-02-28 |
| KR101762340B1 (ko) | 2017-07-27 |
| KR20170068322A (ko) | 2017-06-19 |
| US11066573B2 (en) | 2021-07-20 |
| US20190040277A1 (en) | 2019-02-07 |
| WO2017099533A8 (ko) | 2017-07-27 |
| JP6868624B2 (ja) | 2021-05-12 |
| MX2018007003A (es) | 2018-11-09 |
| CN108603014B (zh) | 2020-07-28 |
| CN108603014A (zh) | 2018-09-28 |
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