Coating composition having excellent corrosion resistance and fingerprint resistance, stainless steel sheet having etching patterns, and manufacturing method therefor

Abstract

Provided is a coating composition having excellent corrosion resistance and fingerprint resistance, and also provides a stainless steel sheet having etching patterns and a manufacturing method therefor, the stainless steel sheet comprising: a stainless steel sheet; a coating layer, which is formed on the stainless steel sheet and is a cured product of the coating composition; and a quenching coated film layer formed on the coating layer and having a quenching effect, wherein: the coating layer, formed by curing the coating composition having excellent corrosion resistance and fingerprint resistance, is transparent and has high gloss, thereby having an effect of enabling the surface characteristics of the stainless steel sheet to be expressed as they are; the stainless steel sheet having etching patterns has excellent corrosion resistance and fingerprint resistance even on the parts thereof on which the etching patterns are not formed.

1 . A coating composition comprising: 10 to 30 wt % of a silane-based compound, 0.5 to 6 wt % of an organic acid, 0.1 to 3 wt % of a vanadium compound, 0.1 to 3 wt % of a magnesium compound, and a remainder of a solvent. 
     
     
         2 . The coating composition of  claim 1 , further comprising: 1 to 2 wt % of a wetting agent, and 0.01 to 1 wt % of a defoamer. 
     
     
         3 . The coating composition of  claim 1 , wherein the silane-based compound is one or more selected from the group consisting of epoxy-based silane and amino-based silane. 
     
     
         4 . The coating composition of  claim 1 , wherein the organic acid is one or more selected from the group consisting of formic acid, acetic acid and phosphoric acid. 
     
     
         5 . A stainless steel sheet having etching patterns, comprising:
 a stainless steel sheet;   a coating layer, formed on the stainless steel sheet, and comprising a cured product of the coating composition of  claim 1 ; and   a quenching coated film layer, formed on the coating layer and having a quenching effect.   
     
     
         6 . The stainless steel sheet of  claim 5 , wherein the coating layer has a thickness of 0.1 to 10 μm. 
     
     
         7 . The stainless steel sheet of  claim 5 , wherein the coating layer has a gloss of 80 or more at 60°. 
     
     
         8 . The stainless steel sheet of  claim 5 , wherein the quenching coated film layer includes a quencher. 
     
     
         9 . The stainless steel sheet of  claim 8 , wherein the quencher is one or more selected from the group consisting of silica, alumina, wax, ceramic and synthetic polymer powder. 
     
     
         10 . The stainless steel sheet of  claim 5 , wherein the quenching coated film layer includes a plurality of bubbles. 
     
     
         11 . The stainless steel sheet of  claim 10 , wherein the bubbles have an average diameter of 0.5 to 3 μm. 
     
     
         12 . The stainless steel sheet of  claim 5 , wherein the quenching coated film layer has a thickness of 1 to 20 μm. 
     
     
         13 . The stainless steel sheet of  claim 5 , wherein the quenching coated film layer has a gloss of 3 to 50 at 60°. 
     
     
         14 . A manufacturing method of a stainless steel sheet having etching patterns, comprising:
 coating the coating composition of  claim 1  on a stainless steel sheet to form a coating layer; and   forming a quenching coated film layer, having an etching effect, on the coating layer.   
     
     
         15 . The method of  claim 14 , wherein the quenching coated film layer is formed by a method of coating a coating material including a quencher on the coating layer, and then curing the coating material. 
     
     
         16 . The method of  claim 14 , wherein the quenching coated film layer is formed by a method including:
 ejecting a transparent ink onto the coating layer; and   performing UV curing within 2 seconds of ejecting the transparent ink.   
     
     
         17 . The method of  claim 14 , wherein the ejecting is performed by an ink jet printer or a laser printer. 
     
     
         18 . The method of  claim 14 , wherein the ejecting speed of the transparent ink in the ejecting is 1 to 20 kHz.