Abstract: This invention provides a paint formulation that is used as a primer of a polypropylene substrate for automotive exterior parts etc., that has better chemical resistance and high-pressure car washing resistance than in the past, and that has good storage stability of the paint. Specifically, provided is a paint formulation comprising a modified polyolefin (A) having a glass transition temperature of ?30° C. or more and a (meth)acrylic resin (B) having a glass transition temperature of 0° C. or more, and having a hydroxy value of 5 to 100 mgKOH/g and an acid value of 0 to 30 mgKOH/g, wherein a (meth)acrylic acid ester monomer constituting the (meth)acrylic resin (B) comprises at least one member selected from methyl (meth)acrylate, ethyl (meth)acrylate, cyclohexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, and an OH group-containing (meth)acrylate.

Abstract: The present invention provides a paint formulation that has good storage stability and weather resistance, and that is capable of forming a paint film having excellent water resistance, chemical resistance such as gasohol resistance and fuel resistance, and adhesion. The paint formulation comprises an acid-modified polyolefin (A) and a tackifier (B), and satisfies the following (a) and (b): (a) the acid-modified polyolefin (A) has crystallinity; and (b) the tackifier (B) has a double-bond equivalent of 40 or more, as defined by the formula: double-bond equivalent=weight average molecular weight/number of double bonds in a molecule, or contains no double bond.

Abstract: The present invention provides a coating composition that has excellent storage stability and that is capable of forming a coating film having excellent water resistance, chemical resistance such as gasohol resistance and fuel resistance, and adhesion. The coating composition comprises an acid-modified polyolefin (A), a coumarone-indene resin (B), and a hydrocarbon-based solvent (C), wherein the coumarone-indene resin (B) is contained in an amount of 25 to 400 parts by mass, per 100 parts by mass of the acid-modified polyolefin (A). The coating composition further comprises at least one of an ester-based solvent or ketone-based solvent (D).

Abstract: The present invention provides a coating composition that has excellent storage stability and that is capable of forming a coating film having excellent water resistance, chemical resistance such as gasohol resistance and fuel resistance, and adhesion. The coating composition comprises an acid-modified polyolefin (A), a coumarone-indene resin (B), and a hydrocarbon-based solvent (C), wherein the coumarone-indene resin (B) is contained in an amount of 25 to 400 parts by mass, per 100 parts by mass of the acid-modified polyolefin (A). The coating composition further comprises at least one of an ester-based solvent or ketone-based solvent (D).

Abstract: A method for stirring resin pellets, which includes stirring adhesive resin pellets in a liquid in a stirring tank equipped with a stirring impeller, under the condition satisfying the following relational expression (I): ? ? ? ( Np 1 / 3 ? nD ) 2 ? ? ? pgdp ? 10 ( I ) wherein ? is the density of the liquid (kg/m3), Np is the power number of the stirring impeller, n is the rotational speed (1/s), D is the diameter of the stirring impeller (m), ?? is the difference in density between the resin pellets and the liquid (kg/m3), g is the gravitational acceleration (m/s2), and dp is the particle diameter of the resin pellets (m).

Abstract: A method for stirring resin pellets, which includes stirring adhesive resin pellets in a liquid in a stirring tank equipped with a stirring impeller, under the condition satisfying the following relational expression (I): ? ? ? ( Np 1 / 3 ? nD ) 2 ? ? ? pgdp ? 10 ( I ) wherein ? is the density of the liquid (kg/m3), Np is the power number of the stirring impeller, n is the rotational speed (1/s), D is the diameter of the stirring impeller (m), ?? is the difference in density between the resin pellets and the liquid (kg/m3), g is the gravitational acceleration (m/s2), and dp is the particle diameter of the resin pellets (m).