| abstract |
Disclosed are a composite titanic acid coating film excellent in coating film hardness and adhesion, and a composite titanic acid-coated resin substrate. Specifically disclosed is a composite titanic acid coating film which is obtained as follows: an aqueous medium suspension, which contains a metal alkoxide and a flaky titanic acid obtained by treating a layered titanate with an acid and then having an organic basic compound act thereon for causing interlayer swelling or separation, is applied onto a base, and then the resulting is subjected to a heat treatment for crosslinking and curing the metal alkoxide. Preferably, the layered titanate is represented by the following formula: A x M y □ z Ti 2-(y+z) O 4 [wherein A and M represent different monovalent to trivalent metals, □ represents a defective portion of Ti, x represents a positive real number satisfying 0<x<1, and y and z respectively represent 0 or a positive real number satisfying 0<y+z<1]. |