## wherein R is an alkyl group having 1 to 3 carbon atoms or a phenyl group, R''is hydrogen or an alkyl group having 1 to 12 carbon atoms, p is an integer of 1 to 5, m is an integer of 5 to 100, n and x are independently integers of 1 to 50, t and y are independently integers of 0 to 50, the solid wax having as a main component at least one member selected from the group consisting of linear and b