US 12,421,377 B2
Heat aging-resistant and flexible polyolefin formulation
Qian Gou, Collegeville, PA (US); Timothy J. Person, Pottstown, PA (US); Paul J. Caronia, Annadale, NJ (US); Yushan Hu, Pearland, TX (US); and John Reffner, North Wales, PA (US)
Assigned to Dow Global Technologies LLC, Midland, MI (US); and Rohm and Haas Company, Collegeville, PA (US)
Appl. No. 17/755,595
Filed by Dow Global Technologies LLC, Midland, MI (US); and Rohm and Haas Company, Collegeville, PA (US)
PCT Filed Nov. 10, 2020, PCT No. PCT/US2020/059831
§ 371(c)(1), (2) Date May 3, 2022,
PCT Pub. No. WO2021/101753, PCT Pub. Date May 27, 2021.
Claims priority of provisional application 62/936,717, filed on Nov. 18, 2019.
Prior Publication US 2022/0363876 A1, Nov. 17, 2022
Int. Cl. C08L 23/0807 (2025.01); C08J 3/28 (2006.01); C08J 11/06 (2006.01); C08K 5/00 (2006.01); C08K 5/01 (2006.01); C08L 23/12 (2006.01); C08L 53/00 (2006.01); H01B 3/44 (2006.01)
CPC C08L 23/0815 (2013.01) [C08J 3/28 (2013.01); C08J 11/06 (2013.01); C08K 5/005 (2013.01); C08K 5/01 (2013.01); C08L 23/12 (2013.01); C08L 53/00 (2013.01); H01B 3/441 (2013.01); C08J 2323/08 (2013.01); C08J 2323/12 (2013.01); C08J 2423/08 (2013.01); C08J 2423/12 (2013.01); C08J 2423/16 (2013.01); C08L 2203/202 (2013.01); C08L 2205/025 (2013.01); C08L 2205/03 (2013.01)] 10 Claims
 
1. A polyolefin formulation comprising constituents (A) to (E) in the following amounts: from 15.0 to 55.0 weight percent (wt %) of (A) a polypropylene homopolymer; from 77.9 to 30.0 wt % of (B) a poly(ethylene-co-1-alkene) copolymer; from 3.0 to 6.5 wt % of (C) an ethylene/propylene diblock copolymer; from 4.0 to 8.0 wt % of (D) a saturated-and-aromatic (C14-C60) hydrocarbon; and from 0.1 to 1.5 wt % of (E) an antioxidant; wherein the wt % of (B) divided by the wt % (A) is a mass ratio of from 5.0:1.0 to 0.54:1.0; and wherein the amounts of constituents (A), (B), and (C) total from 88.0 to 95.9 wt % of the polyolefin formulation; and wherein the amounts of constituents (A) to (E) total from 92.1 to 100.0 wt % of the polyolefin formulation.