Powdery processing aid for polyolefin resins, method for producing the same, resin composition and shaped article
View Patent ↗Disclosed are a powdery processing aid for polyolefin resins, containing an alkyl methacrylate polymer which has alkyl methacrylate units having an alkyl group with 2 to 6 carbon atoms as a main component and has a mass average molecular weight of 150,000 to 20,000,000, having good handling properties as a powder, having good dispersibility in polyolefin resins, and being able to improve shaping processability of polyolefin resins; and a polyolefin resin composition having improved shaping processability, which contains a powdery processing aid for polyolefin resins and a polyolefin resin.
1. Powdery processing aid A for polyolefin resins, comprising a polymer having a mass average molecular weight of 150,000 to 20,000,000 and
which has isobutyl methacrylate units as a main chain component.
2. A polyolefin resin composition comprising the powdery processing aid A for polyolefin resins according to claim 1 and polyolefin resin B.
3. A polyolefin resin composition comprising the powdery processing aid A for polyolefin resins according to claim 1 , polyolefin resin B, and thermoplastic elastomer C.
4. A shaped article obtained by shaping the polyolefin resin composition according to claim 2 or 3 .
5. A method for producing the powdery processing aid A for polyolefin resins according to claim 1 , comprising recovering the polymer from a latex of the polymer which has a mass average particle diameter of 50 to 250 nm.
6. A shaped article obtained by shaping the polyolefin resin composition according to claim 3 .
7. The powdery processing aid A according to claim 1 , wherein the isobutyl methacrylate units are present in an amount of at least 50% by mass of the polymer.
8. The powdery processing aid A according to claim 1 , wherein the isobutyl methacrylate units are present in an amount of at least 70% by mass of the polymer.
9. The powdery processing aid A according to claim 1 , wherein the mass average molecular weight of 500,000 to 20,000,000.
10. The powdery processing aid A according to claim 1 , wherein the mass average molecular weight of 1,000,000 to 20,000,000.
11. The powdery processing aid A according to claim 1 , wherein the mass average molecular weight of 1,600,000 to 20,000,000.
12. The powdery processing aid A according to claim 1 , wherein the mass average molecular weight of 150,000 to 5,000,000.
13. The powdery processing aid A according to claim 1 , wherein the mass average molecular weight of 150,000 to 7,000,000.
14. The polyolefin resin composition according to claim 2 , wherein powdery processing aid A is present in an amount of 0.5 to 20 parts by mass based on 100 parts by mass of polyolefin resin B.
15. The polyolefin resin composition according to claim 2 , wherein powdery processing aid A is present in an amount of 1 to 15 parts by mass based on 100 parts by mass of polyolefin resin B.
16. The polyolefin resin composition according to claim 3 , wherein powdery processing aid A is present in an amount of 0.5 to 20 parts by mass based on 100 parts by mass of the sum of polyolefin resin B and thermoplastic elastomer C.
17. The polyolefin resin composition according to claim 3 , wherein powdery processing aid A is present in an amount of 1 to 15 parts by mass based on 100 parts by mass of the sum of polyolefin resin B and thermoplastic elastomer C.
18. The polyolefin resin composition according to claim 3 , wherein polyolefin resin B is present in an amount of from 25 to less than 100% by mass and thermoplastic elastomer C is present in an amount of from more than 0 to 75% by mass, wherein the sum of polyolefin resin B and thermoplastic elastomer C is 100% by mass.