PROCESSING AID FOR POLYOLEFIN-BASED RESIN, POLYOLEFIN-BASED RESIN COMPOSITION AND MOLDED ARTICLE
To provide a processing aid for a polyolefin-based resin, capable of providing a polyolefin-based resin composition having excellent melt tension, fluidity and die build-up inhibiting effect. A processing aid for a polyolefin-based resin, comprising (A) an alkyl methacrylate-based polymer containing, as a main component, a unit of (a1) an alkyl methacrylate in which the alkyl group has 2 to 10 carbon atoms, and having a mass average molecular weight of 15,000 to 145,000.
1 . A processing aid for a polyolefin-based resin, comprising (A) an alkyl methacrylate-based polymer containing, as a main component, a unit of (a1) an alkyl methacrylate in which the alkyl group has a carbon number of 2 to 10, and having a mass average molecular weight of 15,000 to 145,000.
2 . The processing aid for a polyolefin-based resin as claimed in claim 1 , wherein said unit of (a1) is a unit of an alkyl methacrylate with the alkyl group having a carbon number of 4.
3 . The processing aid for a polyolefin-based resin as claimed in claim 1 , wherein said unit of (a1) is an i-butyl methacrylate unit.
4 . The processing aid for a polyolefin-based resin as claimed in claim 1 , wherein the mass average molecular weight of the alkyl methacrylate-based polymer (A) is from 20,000 to 100,000.
5 . A polyolefin-based resin composition comprising the processing aid for a polyolefin-based resin claimed in any one of claims 1 to 4 and (B) a polyolefin-based resin.
6 . A polyolefin-based resin composition comprising the processing aid for a polyolefin-based resin claimed in any one of claims 1 to 4 , (B) a polyolefin-based resin and (C) a thermoplastic elastomer.
7 . A molded article obtained by molding the polyolefin-based resin composition claimed in claim 5 .
8 . A molded article obtained by molding the polyolefin-based resin composition claimed in claim 6 .