Abstract: A moisture-crosslinkable primer which comprises a solution of a hydrogenated polybutadiene into which has been introduced a silyl group of the formula: ##STR1## wherein R is an alkyl group having 1 to 5 carbon atoms, R' is an alkoxy group having 1 to 5 carbon atoms or a halogen atom, and n is an integer of from 1 to 3, in an organic solvent, which has excellent heat-resistant adhesion and durable adhesion and is useful for adhering between polyolefinic substances or between polyolefinic substances and other organic substances.

Abstract: The invention relates to a moisture-curable primer composition comprising a reaction product between a maleic anhydride-modified styrene-ethylene-butene-styrene copolymer and an epoxysilane compound. This primer composition is particularly useful for the bonding of polyolefin adherents.

Abstract: A two part primer composition comprising a main component comprising at least one styrene-ethylene-butene-styrene block copolymer or styrene-ethylene-propylene-styrene copolymer, said copolymer being copolymerized with maleic anhydride hydrogenated, and an amine catalyst, and a curing component comprising an epoxy resin having two or more functional groups, which has excellent heat-resistant adhesion and durable adhesion and is suitable for adhering between polyolefinic substances or between an polyolefinic substance and other organic substance.

Abstract: A polyurethane adhesive comprising(a) a specific block polyurethane polyol produced by reacting a hydrogenated polybutadiene glycol, a polyol having two or more hydroxy groups, and a polyisocyanate,(b) a thermoplastic polyester urethane rubber, and(c) a polyisocyanate compound as a crosslinking agent,said polyurethane adhesive being useful for adhesion of low polar materials, particularly adhesion between polypropylene materials and sheets of polyvinyl chloride.