	US 11,939,457 B2
	Polymer blends having improved thermal properties
Xian Jiang, Sugarland, TX (US); and Yushan Hu, Pearland, TX (US)
Assigned to Dow Global Technologies LLC, Midland, MI (US)
Appl. No. 17/637,729
Filed by Dow Global Technologies LLC, Midland, MI (US)
PCT Filed Aug. 27, 2020, PCT No. PCT/US2020/048121 § 371(c)(1), (2) Date Feb. 23, 2022, PCT Pub. No. WO2021/041618, PCT Pub. Date Mar. 4, 2021.
Claims priority of provisional application 62/893,364, filed on Aug. 29, 2019.
Prior Publication US 2022/0282075 A1, Sep. 8, 2022
Int. Cl. C08L 23/08 (2006.01); C08L 23/14 (2006.01); C08L 53/00 (2006.01)

CPC C08L 23/0876 (2013.01) [C08L 23/0815 (2013.01); C08L 23/142 (2013.01); C08L 53/00 (2013.01); C08L 2205/03 (2013.01)]

13 Claims

1. A polymer blend comprising:

1 to 40 wt.% of a crystalline block composite comprising an EP-iPP diblock polymer, iPP, and EP, wherein iPP is isotactic polypropylene homopolymer and EP is a copolymer of ethylene and propylene, and wherein the crystalline block composite comprises greater than 65 wt.% iPP; and

from 60 wt.% to 99 wt.% of an ionomer formed from a partially neutralized precursor acid copolymer, wherein the precursor acid copolymer (a) comprises copolymerized units of ethylene and 5 wt.% to 30 wt.%, based on the total weight of the precursor acid copolymer, of copolymerized units of an α,β-ethylenically unsaturated carboxylic acid having 3 to 8 carbon atoms, and wherein about 25% to about 65% of the acid groups derived from the α,β-ethylenically unsaturated carboxylic acid of the precursor acid copolymer are neutralized.