Abstract: The invention relates to an aqueous resin composition characterized by comprising 80 to 10 parts by weight of modified polyolefin with weight average molecular weight of 1000 to 100000, modified by copolymerizing polypropylene, polyethylene, copolymer of propylene or ethylene with .alpha.-olefin or degradation products of these under heat or with oxidizing agent, radical-generating agent or the like, with 0.1 to 20% by weight of one kind or not less than two kinds of acid anhydride, carboxylic acid or alcohol with radically polymerizable double bond, and 20 to 90 parts by weight of one kind or a mixture of two or more kinds of acrylic or methacrylic monomers, mixed or dissolved and polymerized in water in the presence of surfactant and polymerization initiator. And, the aqueous resin composition of the invention not only shows excellent adhesion to polyolefin, but also has adherence to other organic substrates and inorganic substrates.

Abstract: Disclosed is an aqueous dispersion comprising a carboxyl group-containing chlorinated polypropylene with acid value of 10 to 60 and chlorine content of 15 to 35 wt. % and a carboxyl group-containing propylene-.alpha.-olefin copolymer with number average molecular weight of 2000 to 20000 and acid value of 30 to 150, neutralized with basic substance and dispersed into water using nonionic surfactant. It is possible to obtain an aqueous dispersion of chlorinated polypropylene with excellent adhesive property without using organic solvent.