Polyolefin-based resin composition and molded body

Patent metadata

Field	Value
Publication number	US-2016297956-A1
Application number	US-201414888003-A
Country	US
Kind code	A1
Filing date	Sep 29, 2014
Priority date	Sep 30, 2013
Publication date	Oct 13, 2016
Grant date	—

Abstract

Provided is a polyolefin-based resin composition including a hydrogenated block copolymer (A) and a polyolefin-based resin (B), the hydrogenated block copolymer (A) being a hydrogenated product of a block copolymer including a polymer block (a) composed of a constitutional unit derived from an aromatic vinyl compound and a polymer block (b) containing 1 to 100% by mass of a constitutional unit (b1) derived from farnesene and 99 to 0% by mass of a constitutional unit (b2) derived from a conjugated diene other than farnesene; a mass ratio of the polymer block (a) and the polymer block (b) [(a)/(b)] being 1/99 to 55/45; 50 mol % or more of carbon-carbon double bonds in the polymer block (b) being hydrogenated; and a mass ratio of the polyolefin-based resin (B) and the hydrogenated block copolymer (A) [{polyolefin-based resin (B)}/{hydrogenated block copolymer (A)}] being 1/99 to 99/1. The polyolefin-based resin composition is favorable in flexibility and molding processability, excellent in weather resistance and whitening resistance, and also excellent in rigidity.

First claim

1 . A polyolefin-based resin composition comprising a hydrogenated block copolymer (A) and a polyolefin-based resin (B),
the hydrogenated block copolymer (A) being a hydrogenated product of a block copolymer including a polymer block (a) composed of a constitutional unit derived from an aromatic vinyl compound and a polymer block (b) containing 1 to 100% by mass of a constitutional unit (bl) derived from farnesene and 99 to 0% by mass of a constitutional unit (b2) derived from a conjugated diene other than farnesene, a mass ratio of the polymer block (a) and the polymer block (b) [(a)/(b)] being 1/99 to 55/45, 50 mol % or more of carbon-carbon double bonds in the polymer block (b) being hydrogenated, and a mass ratio of the polyolefin-based resin (B) and the hydrogenated block copolymer (A) [{polyolefin-based resin (B)}/{hydrogenated block copolymer (A)}] being 1/99 to 99/1.

2 . The polyolefin-based resin composition according to claim 1 , wherein the farnesene is β-farnesene.

3 . The polyolefin-based resin composition according to claim 1 , wherein a hydrogenation rate of carbon-carbon double bonds in the polymer block (b) is 70 mol % or more.

4 . The polyolefin-based resin composition according to claim 1 , wherein a peak top molecular weight (Mp) of the hydrogenated block copolymer (A) is 4,000 to 1,500,000.

5 . The polyolefin-based resin composition according to claim 1 , wherein a molecular weight distribution (Mw/Mn) of the hydrogenated block copolymer (A) is 1 to 4.

6 . The polyolefin-based resin composition according to claim 1 , wherein the aromatic vinyl compound is styrene.

7 . The polyolefin-based resin composition according to claim 1 , wherein the conjugated diene other than farnesene is at least one selected from the group consisting of isoprene, butadiene, and myrcene.

8 . A molded body comprising the polyolefin-based resin composition according to claim 1 .

9 . A composite molded body comprising the polyolefin-based resin composition according to claim 1 and at least one of a dynamic crosslinking type olefin-based thermoplastic elastomer and a vulcanized rubber.

Assignees

• Kuraray Co
• Amyris Inc

Inventors

• Sasaki Hiromitsu
• Uehara Yosuke
• Suzuki Shota

Classifications

• C08L53/025

  modified · CPC title

• C08L23/12 Primary

  Polypropene · CPC title

• C08L2205/06

  having improved processability or containing aids for moulding methods · CPC title

• C08F297/04

  polymerising vinyl aromatic monomers and conjugated dienes · CPC title

• C08F8/04

  Reduction, e.g. hydrogenation · CPC title