	US 12,491,667 B2
	Rotational molding composition
Henry Hay, Calgary (CA); and Carmine D'Agostino, Mississauga (CA)
Assigned to NOVA Chemicals (International) S.A., Fribourg (CH)
Appl. No. 18/041,014
Filed by NOVA Chemicals (International) S.A., Fribourg (CH)
PCT Filed Sep. 3, 2021, PCT No. PCT/IB2021/058062 § 371(c)(1), (2) Date Feb. 8, 2023, PCT Pub. No. WO2022/058835, PCT Pub. Date Mar. 24, 2022.
Claims priority of provisional application 63/080,874, filed on Sep. 21, 2020.
Prior Publication US 2023/0339150 A1, Oct. 26, 2023
Int. Cl. C08L 23/06 (2006.01); B29C 41/00 (2006.01); B29C 41/04 (2006.01); B29C 41/22 (2006.01); B29K 23/00 (2006.01); B29K 105/00 (2006.01); B29K 105/26 (2006.01)

CPC B29C 41/003 (2013.01) [B29C 41/04 (2013.01); B29C 41/22 (2013.01); B29K 2023/0608 (2013.01); B29K 2105/0044 (2013.01); B29K 2105/26 (2013.01); B29K 2995/0012 (2013.01); B29K 2995/0063 (2013.01)]

13 Claims

1. A rotomolding composition comprising:

a virgin polyethylene copolymer having an average particle size from about 0.2 mm to 0.4 mm; a melt index, I₂, of from 0.5 grams/10 minutes to 10 grams/10 minutes as measured by ASTM D1238; and a density as measured by ASTM D792 of from 0.920 g/cc to 0.950 g/cc; and

a recycled polyethylene resin having an average particle size from 1 mm and 4 mm;

wherein the recycled polyethylene resin has a recycled polyethylene melt index, I₂, that is less than the melt index of the virgin polyethylene copolymer.