US 11,873,355 B2
Propylene-ethylene copolymer compositions suitable for hot fill packaging of foodstuffs
Matthew John Fedec, Columbia, MD (US); Jan Willem Van Egmond, Columbia, MD (US); Manu Rego, Columbia, MD (US); John Kalevi Kaarto, Columbia, MD (US); and Li-Min Tau, Columbia, MD (US)
Assigned to W.R. Grace & Co.-Conn., Columbia, MD (US)
Appl. No. 16/972,863
Filed by W. R. Grace & Co.-Conn, Columbia, MD (US)
PCT Filed Jun. 7, 2019, PCT No. PCT/US2019/036046
§ 371(c)(1), (2) Date Dec. 7, 2020,
PCT Pub. No. WO2019/241063, PCT Pub. Date Dec. 19, 2019.
Claims priority of provisional application 62/683,113, filed on Jun. 11, 2018.
Prior Publication US 2021/0253755 A1, Aug. 19, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C08F 210/06 (2006.01); C08F 210/16 (2006.01); C08K 5/053 (2006.01); C08K 5/1575 (2006.01); C08K 5/5419 (2006.01); C08L 23/14 (2006.01); C08L 23/16 (2006.01)
CPC C08F 210/06 (2013.01) [C08F 210/16 (2013.01); C08K 5/053 (2013.01); C08K 5/1575 (2013.01); C08K 5/5419 (2013.01); C08L 23/14 (2013.01); C08L 23/16 (2013.01); C08L 2203/30 (2013.01); C08L 2314/02 (2013.01)] 18 Claims
 
1. A propylene-ethylene copolymer comprising:
propylene as a primary monomer;
an ethylene content (ET) of from 2.0% to 5% by weight;
a melt flow rate greater than 45 g/10 min and less than 100 g/10 min;
a xylene soluble fraction (XS) of from 2.0% to 7.0% by weight; and
a xylene soluble fraction to ethylene content ratio (XS/ET) of less than or equal to 1.51.