Propylene based resin composition and use thereof

Patent metadata

Field	Value
Publication number	US-9963567-B2
Application number	US-201514931998-A
Country	US
Kind code	B2
Filing date	Nov 4, 2015
Priority date	Nov 25, 2004
Publication date	May 8, 2018
Grant date	May 8, 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 material for foam (X7), the material being a composition comprising a propylene-based polymer (B7) whose melting point is lower than 100° C. or not observed when measured with a differential scanning calorimeter, and the composition further comprising 1 to 1900 parts by weight of an ethylene/α-olefin copolymer (C7) containing 75 to 95 mol % of ethylene-derived structural units and 5 to 25 mol % of C 3 -C 20 α-olefin-derived structural units, wherein the total of ethylene-units and α-olefin-units is 100 mol %, and/or 1 to 1900 parts by weight of an ethylene/polar monomer copolymer (D7), relative to 100 parts by weight of the total of propylene-based polymer (B7) and an optional propylene-based polymer (A7) whose melting point is 100° C. or higher as measured with a differential scanning calorimeter.

2. The material for foam (X7) according to claim 1 wherein the propylene-based polymer (B7) is a copolymer of propylene and at least one C 2 -C 20 α-olefin other than propylene, and the melting point of (B7) is lower than 100° C. or not observed when measured with a differential scanning calorimeter.

3. The material for foam (X7) according to claim 1 wherein the material for foam (X7) is a composition comprising 30 to 100 parts by weight of the propylene-based polymer (B7); and 0 to 70 parts by weight of a propylene-based polymer (A7) whose melting point is 100° C. or higher as measured with a differential scanning calorimeter, provided that the total of (B7) and (A7) is 100 parts by weight.

4. The material for foam (X7) according to claim 1 , wherein the propylene-based polymer (B7) is a propylene/ethylene/α-olefin copolymer (B7-1) containing 45 to 92 mol % of propylene-derived structural units, 5 to 25 mol % of ethylene-derived structural units, and 3 to 30 mol % of C 4 -C 20 α-olefin-derived structural units, provided that the total of the propylene-derived structural units, the ethylene-derived structural units, and the C 4 -C 20 α-olefin-derived structural units is 100 mol %.

5. The material for foam (X7) according to claim 1 further comprising a foaming agent (E7).

6. The material for foam (X7) according to claim 1 , wherein the ethylene/α-olefin copolymer (C7) is ethylene/1-butene copolymer.

7. A foam obtained from the material for foam (X7) according to claim 1 .

8. A foam obtained from the material for foam (X7) according to claim 1 obtained by heat treatment or radiation treatment of the material for foam (X7) according to claim 1 .

9. The foam according to claim 8 , wherein the foam is obtained by heat treatment of the material for foam (X7) placed in a mold.

10. A foam obtained by secondary compression of the foam according to claim 9 .

11. A foam obtained from a material for foam (X7) comprising a propylene-based polymer (B7) whose melting point is lower than 100° C. or not observed when measured with a differential scanning calorimeter, the foam having a gel content of 70% or more and a specific gravity of 0.6 or less.

12. A laminate comprising a layer comprising the foam according to claim 7 and a layer made of at least one material selected from the group consisting of polyolefin, polyurethane, rubber, leather, and artificial leather.

13. Footwear comprising a foam or a laminate comprising a layer comprising a foam and a layer made of at least one material selected from the group consisting of polyolefin, polyurethane, rubber, leather, and artificial leather, the foam being obtained from a material for foam (X7) comprising a propylene-based polymer (B7) whose melting point is lower than 100° C. or not observed when measured with a differential scanning calorimeter.

14. A footwear component comprising a foam or a laminate comprising a layer comprising a foam and a layer made of at least one material selected from the group consisting of polyolefin, polyurethane, rubber, leather, and artificial leather, the foam being obtained from a material for foam (X7) comprising a propylene-based polymer (B7) whose melting point is lower than 100° C. or not observed when measured with a differential scanning calorimeter.

15. The footwear component according to claim 14 , wherein the footwear component is a mid sole, an inner sole, or a sole.

Assignees

• Mitsui Chemicals Inc

Inventors

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

Classifications

• B32B27/065

  of foam · CPC title

• C08J2323/12

  Polypropene · CPC title

• C08L23/142

  at least partially crystalline copolymers of propene with other olefins · CPC title

• C08L2205/02

  containing two or more polymers of the same C08L -group · CPC title

• B32B25/00

  Layered products comprising {a layer of} natural or synthetic rubber {(fibrous or filamentary layer made of a natural or synthetic rubber B32B5/02; particulate layer made of a natural or synthetic rubber B32B5/16; foamed layer made of a natural or synthetic rubber B32B5/18)} · CPC title