Method for forming in-mold coating multi-layer coating film

A method of forming an in-mold coated multi-layer coating film, the method comprising:

• step (1):
• forming an uncured first in-mold coating film by injecting a first in-mold coating composition (X) between a molded base material and an inner wall of a first film-coating-mold, the first in-mold coating composition (X) containing a polymerizable unsaturated group-containing compound (x1) containing a polymerizable unsaturated group, and a compound (x2) containing a first reactive functional group other than a polymerizable unsaturated group and containing no polymerizable unsaturated group;
• step (2):
• heating the uncured first in-mold coating film to thereby cure the uncured first in-mold coating film and form a cured first in-mold coating film;
• step (3):
• separating the first film-coating-mold from a surface of the cured first in-mold coating film;
• step (4):
• providing a gap between the surface of the cured first in-mold coating film and a second film-coating-mold;
• step (5):
• forming an uncured second in-mold coating film by injecting a second in-mold coating composition (Y) between the surface of the cured first in-mold coating film and an inner wall of the second film-coating-mold, the second in-mold coating composition (Y) containing a compound (y1) containing a second reactive functional group capable of reacting with the first reactive functional group;
• and
• step (6):
• heating and curing the uncured second in-mold coating film, wherein
• the second film-coating-mold is the same as or different from the first film-coating-mold.