	US 12,129,366 B2
	Recycled polymer composition for manufacturing small to medium- sized container including HDPE recovered from secondary battery separator and small to medium-sized container manufactured therefrom
Hye Jin Lee, Daejeon (KR); Jong Sang Park, Daejeon (KR); Dae Sig Hong, Daejeon (KR); and Sang Mook Kang, Daejeon (KR)
Assigned to SK Innovation Co., Ltd., Seoul (KR); and SK Geo Centric Co., Ltd., Seoul (KR)
Filed by SK Innovation Co., Ltd., Seoul (KR); and SK Geo Centric Co., Ltd., Seoul (KR)
Filed on May 31, 2023, as Appl. No. 18/326,082.
Claims priority of application No. 10-2022-0104064 (KR), filed on Aug. 19, 2022.
Prior Publication US 2024/0059878 A1, Feb. 22, 2024
Int. Cl. C08L 23/06 (2006.01); H01M 50/417 (2021.01)

CPC C08L 23/06 (2013.01) [C08L 2207/062 (2013.01); C08L 2207/20 (2013.01); H01M 50/417 (2021.01)]

18 Claims

1. A polymer composition for manufacturing a small to medium-sized container, wherein the polymer composition consists of i) high-density polyethylene (HDPE) and ii) optionally one or more additives, wherein the HDPE comprises:

a) a first HDPE; and

b) a second HDPE,

wherein the polymer composition satisfies Equation 1:

wherein:

x is a weight percentage of the first HDPE in the polymer composition for manufacturing a small to medium-sized container,

y is a weight percentage of the second HDPE in the polymer composition for manufacturing a small to medium-sized container,

MI_ais a melt flow index (MFI) of the first HDPE,

MI_bis an MFI of the second HDPE,

wherein MFI is measured in accordance with American Society for Testing and Materials standard ASTM D1238-10 (MFI measured at 190° C. at 2.16 kg),

wherein the first HDPE comprises HDPE recovered from a separator for a secondary battery or the manufacture of a secondary battery,

wherein the second HDPE has a density of about 0.930 g/cm³to about 0.970 g/cm³,

wherein the second HDPE has a polydispersity index (PDI) of at least about 6, and

wherein the small to medium-sized container has a volume of less than 20 L.