A resin coating composition of claim 13 wherein said active carbamic acid ester functional group has the formula ##STR18## wherein X is a tertiary nitrogen atom, an oxygen atom or a sulfur atom, or an aliphatic hydrocarbon group having 1 to 6 carbon atoms which contains said atoms at both ends; and R7 is a hydroxyl group or an aliphatic hydrocarbon group having 1 to 12 carbon atoms which may conta