Propylene based resin composition and use thereof

Patent metadata

Field	Value
Publication number	US-9908983-B2
Application number	US-201514931992-A
Country	US
Kind code	B2
Filing date	Nov 4, 2015
Priority date	Nov 25, 2004
Publication date	Mar 6, 2018
Grant date	Mar 6, 2018

Abstract

Means for solving the problems
The thermoplastic resin composition (X1) of the present invention comprises (A1), (B1), (C1), and optionally (D1) below:
1 to 90 wt % of an isotactic polypropylene (A1); 9 to 98 wt % of a propylene/ethylene/α-olefin copolymer (B1) containing 45 to 89 mol % of propylene-derived structural units, 10 to 25 mol % of ethylene-derived structural units, and optionally, 0 to 30 mol % of C 4 -C 20 α-olefin-derived structural units (a1); 1 to 80 wt % of a styrene-based elastomer (C1); and 0 to 70 wt % of an ethylene/α-olefin copolymer (D1) whose density is in the range of 0.850 to 0.910 g/cm 3 , wherein (A1)+(B1)+(C1)+(D1)=100 wt %.

First claim

The invention claimed is:

1. A thermoplastic resin composition (X2) comprising (A2), (B2), (C2), (D2), and (E2) below:
5 to 95 wt % of a propylene/α-olefin copolymer (B2) whose melting point is not higher than 100° C. or not observed when measured with a differential scanning calorimeter (DSC);
5 to 95 wt % of a styrene-based elastomer (C2);
0 to 90 wt % of an isotactic polypropylene (A2);
0 to 70 wt % of an ethylene/α-olefin copolymer (D2) whose density is in the range of 0.850 to 0.910 g/cm 3 ,
wherein the total of (A2), (B2), (C2), and (D2) is 100 wt %; and
a softener (E2) in an amount of 0 to 400 parts by weight relative to 100 parts by weight of the total of (A2), (B2), (C2), and (D2).

2. The thermoplastic resin composition (X2) according to claim 1 , wherein the propylene/α-olefin copolymer (B2) is a copolymer of propylene and at least one C 4 -C 20 α-olefin.

3. The thermoplastic resin composition (X2) according to claim 1 , wherein the propylene/α-olefin copolymer (B2) is a propylene/1-butene copolymer whose molecular weight distribution (Mw/Mn) is 3 or less as measured by gel permeation chromatography (GPC).

4. The thermoplastic resin composition (X2) according to claim 1 , wherein the propylene/α-olefin copolymer (B2) is obtained by polymerization using a metallocene catalyst.

5. A crosslinked product of the thermoplastic resin composition (X2) obtained by crosslinking the thermoplastic resin composition (X2) according to claim 1 .

6. A molded article made of the thermoplastic resin composition (X2) according to claim 1 .

7. A molded article made of the crosslinked product according to claim 5 .

8. A molded article made of a crosslinked product of the thermoplastic resin composition (X2) obtained by crosslinking the thermoplastic resin composition (X2) according to claim 1 , obtained by further crosslinking a molded article made of the thermoplastic resin composition (X2) according to claim 1 .

Assignees

• Mitsui Chemicals Inc

Inventors

• Hoya Hiroshi
• Noda Kiminori
• Inoue Norihide
• Uehara Hiroshi
• Shiba Eiji
• Yamaguchi Masayoshi
• Kawamoto Manabu
• Yamashita Akira

Classifications

• B32B27/32

  comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} · CPC title

• Y10T428/24942

  including components having same physical characteristic in differing degree · CPC title

• Y10T442/60

  Nonwoven fabric [i.e., nonwoven strand or fiber material] · CPC title

• C08L2205/03

  containing three or more polymers in a blend · CPC title

• B32B5/18

  characterised by features of a layer {of} foamed material · CPC title