Abstract: A polyolefin resin composition including the following (A), (B) and (C), or the following (A), (B), (C) and (D): (A) a polymer synthesized from an ?-olefin having 3 or more carbon atoms, (B) a modified propylene based polymer satisfying the following (1) to (4): (1) the content of polar group moieties resulting from a compound containing in the same molecule thereof an ethylenic double bond and a polar group is from 0.10 to 0.30 mmol/g, (2) the intrinsic viscosity ([?]A) measured at 135° C. in tetralin is from 0.8 to 3.0 dl/g, (3) the molecular weight distribution (Mw/Mn) is more than 2.5, and (4) the content of components having a molecular weight (Mw) of 10000 or less is 5% or less by weight, (C) an organized layer inorganic compound, and (D) a rubbery polymer.

Abstract: The present invention relates to a pigment master batch composition which comprises a specific thermoplastic elastomer, a thermoplastic resin and a pigment and clearly reveals grain-like colored patterns and which can effectively suppress a reduction in a pinch-off part strength and an impact strength caused by a pattern-coloring action, and the above composition can be used not only for blow molding but also injection molding and extrusion molding. Further, a change in a color tone of a base color can be inhibited even if a recycled material containing pigments is used to carry out molding, and a rate of defectives produced by a difference in a color tone can be controlled.