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OwnerYasuhiro Kinoshita, Kazunari Hamamura +1inventors
InventorsYasuhiro Kinoshita, Kazunari Hamamura, Ryousuke Sako
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The object of the present invention is to provide a metal surface treatment agent which improves the press molding workability of metal materials, and which can form a coating film that is superior in terms of at least one of moisture resistance and coating film stripping characteristics. The metal surface treatment agent of the present invention comprises (A) a copolymer which comprises (a) styrene and (b) a vinyl compound with carboxyl groups that is copolymerizable with styrene, and (B) a lubricating agent. The metal surface treatment agent is characterized by the fact that the weight ratio of component (a) to component (b) in the aforementioned polymer (A), i.e., (a)/(b) (weight ratio), is in the range of 1/9 to 9/1, the proportion of (a)+(b) in the aforementioned polymer (A) is 30 to 100 weight %, and the weight ratio of (B) to (A)+(B) is 2 to 30 weight %.
A metal surface treatment agent which comprises (A) a copolymer which comprises (a) styrene and (b) a vinyl compound with carboxyl groups that is copolymerizable with styrene, and (B) a lubricating agent, the (A) copolymer having a weight ratio of component (a) to component (b) in the range of 1/9 to 9/1, with (a)+(b) being present in polymer (A) in an amount of 30 to 100 weight %, and the ratio of (B) to (A)+(B) being 2 to 30 weight %.
A surface-treated metal material with superior press molding workability and/or coating film stripping characteristics which is formed by coating a surface of the metal material with a metal surface treatment agent comprising (A) a copolymer which comprises (a) styrene and (b) a vinyl compound with carboxyl groups that is copolymerizable with styrene, and (B) a lubricating agent, with the (A) copolymer having a weight ratio of component (a) to component (b) in the range of 1/9 to 9/1, with (a)+(b) being present in polymer (A) in an amount of 30 to 100 weight %, and the ratio of (B) to (A)+(B) being 2 to 30 weight %, and then drying the metal surface treatment agent, with the amount of adhering film following drying being 0.1 to 5 g/m2.
Dependencies are inferred from the claim text.