High-flow and high-impact polyolefin resin composition

Patent metadata

Field	Value
Publication number	US-9580585-B2
Application number	US-201514863419-A
Country	US
Kind code	B2
Filing date	Sep 23, 2015
Priority date	Dec 3, 2014
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

A high-flow and high-impact polyolefin resin composition comprises: about 5 to 96% by weight of an isotactic polypropylene-based resin; about 1 to 15% by weight of a low molecular weight atactic polypropylene resin having weight average molecular weight of about 10,000 to 100,000 g/mol; about 1 to 20% by weight of an ultra-high molecular weight atactic polypropylene resin having weight average molecular weight of about 1,000,000 to 2,500,000 g/mol; about 1 to 40% by weight of an inorganic filler; and about 1 to 20% by weight of a rubber.

First claim

What is claimed is:

1. A high-flow and high-impact polyolefin resin composition comprising:
about 5 to 96% by weight an isotactic polypropylene-based resin;
about 1 to 15% by weight a low molecular weight atactic polypropylene resin having weight average molecular weight of about 10,000 to 100,000 g/mol;
about 1 to 20% by weight an ultra-high molecular weight atactic polypropylene resin having weight average molecular weight of about 1,000,000 to 2,500,000 g/mol;
about 1 to 40% by weight an inorganic filler; and
about 1 to 20% by weight a rubber.

2. The high-flow and high-impact polyolefin resin composition of claim 1 , wherein the isotactic polypropylene resin is at least one selected from the group consisting of: a random copolymer polymerized with comonomers selected from the group consisting of propylene, ethylene, butylene, and octene; a block copolymer containing polypropylene and ethylene-propylene rubber; and a branched polypropylene.

3. The high-flow and high-impact polyolefin resin composition of claim 1 , wherein the inorganic filler is at least one selected from the group consisting of talc, calcium carbonate, calcium sulfate, magnesium oxide, calcium stearate, wollastonite, mica, silica, calcium silicate, nanoclay, whiskers, glass fiber, carbon fiber, graphite, graphene, and carbon black.

4. The high-flow and high-impact polyolefin resin composition of claim 3 , wherein the inorganic filler is talc or glass fiber.

5. The high-flow and high-impact polyolefin resin composition of claim 1 , wherein the rubber is a thermoplastic elastomer rubber or a copolymer of ethylene and C 2 ˜C 10 α-olefin.

6. The high-flow and high-impact polyolefin resin composition of claim 5 , wherein the thermoplastic elastomer rubber is at least one selected from the group consisting of ethylene-propylene-rubber (EPR), ethylene-propylene-diene rubber (EPDM), ethylene-butene copolymer rubber (EBR), ethylene-octene copolymer rubber (EOR), and styrene-butadiene rubber (SBR).

7. The high-flow and high-impact polyolefin resin composition of claim 5 , wherein the C 2 ˜C 10 α-olefin is at least one selected from the group consisting of propylene, butene, pentene, hexene, propene, and octene.

8. The high-flow and high-impact polyolefin resin composition of claim 1 , wherein the ultra-high molecular weight atactic polypropylene resin has weight average molecular weight of about 1,200,000 to 2,000,000 g/mol.

9. The high-flow and high-impact polyolefin resin composition of claim 1 , wherein the low molecular weight atactic polypropylene resin has weight average molecular weight of about 20,000 to 80,000 g/mol.

10. The high-flow and high-impact polyolefin resin composition of claim 1 , further comprising at least one additive selected from the group consisting of an antioxidant, a photostabilizer, a flame retardant, a colorant, a plasticizer, a heat stabilizer, a slip agent, and an antistatic agent.

11. An automotive interior and exterior molded article comprising a polyolefin resin composition selected from the high-flow and high-impact polyolefin resin compositions of claim 1 .

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp
• Lotte Chemical Corp

Inventors

• Lee Yong Bum
• Kim Seok Hwan
• Kim Jong Hyun
• Nam Byung Kook
• Cho Sung Min
• Kim Noh Gyoung

Classifications

• C08L2205/035

  containing four or more polymers in a blend · CPC title

• C08L23/12 Primary

  Polypropene · CPC title

• C08L2207/14

  Amorphous or atactic polypropylene · CPC title

• C08L7/00

  Compositions of natural rubber · CPC title

• C08L2205/03

  containing three or more polymers in a blend · CPC title