A modified
polyolefin resin which is obtained by graft modifying a propylene-based random
copolymer having a
melting point of 50 to 130° C. obtainable by
polymerization in the presence of a
metallocene catalyst, with an unsaturated
carboxylic acid and / or its derivative, and has a weight average molecular weight of 15,000 to 200,000, the graft weight of the unsaturated
carboxylic acid and / or its derivative therein being in the range of 0.2 to 50% by weight, is suited as a binder, a primer, an
adhesive and the like against a base to which a
coating or the like is difficult to adhere in a stable manner. The
polyolefin resin of the present invention is superior in
adhesive strength, gasohol resistance, blocking resistance and the like. The
polyolefin resin of the present invention is also superior in
adhesive strength even when low temperature baking is conducted.