| 主权项 |
1. A chemical conversion treatment agent for surface treating a metal substrate, comprising:
at least one metal element selected from the group consisting of zirconium, titanium, and hafnium; a fluorine element; and a co-condensate of a first silane coupling agent (A) and a second silane coupling agent (B), wherein the first silane coupling agent (A) having a tri-or di-alkoxysilane group and an amino group, and the second silane coupling agent (B) is represented by formula (1):wherein
R is selected from the group consisting of alkylene groups having 1 to 5 carbon atoms, alkyleneoxy groups having 1 to 5 carbon atoms, and an oxygen atom, Z is selected from the group consisting of cyclohexyl groups each optionally having at least one of an epoxy group and an amino group as a substituent and aromatic ring groups each optionally having at least one of a vinyl group, an epoxy group, and an amino group as a substituent, a, b, and c are each an integer of 0 to 3, provided that a sum of a, b, and c is 3, and a sum of a and b is 2 to 3, and x is an integer of 1 to 3. |
