US 2004/0176520 A1 · Polyolefin resin composition

Abstract

The polyolefin-based resin composition (I) of the present invention comprises (A) 99.9 to 80% by mass of a propylene (co)polymer having (a) a melt flow rate (MFR) of 0.1 to 200 g/10 min, (b) a meso-pentad fraction [mmmm] of an ordinary temperature (25° C.) xylene-insoluble component of 97.0% or higher, and (c) a content of an ordinary temperature (25° C.) xylene-soluble component of 4 to 50% by mass; and (B) 0.1 to 20% by mass of a copolymer containing propylene chains of an isotactic structure, and copolymer chains constituted from at least two monomer units selected from the group consisting of ethylene, C3 to C20 α-olefins, cyclic olefins and aromatic vinyl monomers which are graft-bonded and/or block-bonded to said copolymer, and exhibits not only a high rigidity but also a highly enhanced impact strength and is well-balanced between the physical properties thereof.

Claims12

Dependent claims

A polyolefin-based resin composition comprising:

(A) 99.9 to 80% by mass of a propylene (co)polymer having (a) a melt flow rate (MFR) of 0.1 to 200 g/10 min, (b) a meso-pentad fraction [mmmm] of an ordinary temperature (25° C.) xylene-insoluble component of 97.0% or higher, and (c) a content of an ordinary temperature (25° C.) xylene-soluble component of 4 to 50% by mass;
and
(B) 0.1 to 20% by mass of a copolymer containing propylene chains of an isotactic structure, and copolymer chains constituted from at least two monomer units selected from the group consisting of ethylene, C3 to C20 α-olefins, cyclic olefins and aromatic vinyl monomers which are graft-bonded and/or block-bonded to said copolymer.

A polyolefin-based resin composition, comprising:

(A) a propylene (co)polymer having (a) a melt flow rate (MFR) of 0.1 to 200 g/10 min and (b) a meso-pentad fraction [mmmm] of an ordinary temperature (25° C.) xylene-insoluble component of 94.0% or higher;
(B) a copolymer containing polypropylene chains of an isotactic structure, and copolymer chains constituted from at least two monomer units selected from the group consisting of ethylene, C3 to C20 α-olefins, cyclic olefins and aromatic vinyl monomers which are graft-bonded and/or block-bonded to said copolymer;
(C) at least one inorganic filler selected from the group consisting of talc, mica and wollastonite;
and
(D) at least one rubber component selected from the group consisting of ethylene-C3 or more α-olefin copolymer elastomers, hydrogenated elastomers of styrene-diene copolymers and hydrogenated elastomers of diene (co)polymers,
said component (B) being contained in an amount of 0.1 to 20 parts by mass based on 100 parts by mass of a mixture containing the components (A), (C) and (D) at a mass ratio of (A)/(C)/(D) of 95 to 40/0 to 30/5 to 30.

3 more elements

Dependencies are inferred from the claim text.

Polyolefin resin composition

Life of this patent

Polyolefin resin composition

Life of this patent

Abstract

Claims12