	US 12,448,504 B2
	Ziegler-Natta catalyzed polyethylene resins and films incorporating same
Teresa P. Karjala, Lake Jackson, TX (US); Kurt F. Hirsekorn, Sugar Land, TX (US); Marlos Giuntini de Oliveira, São Paulo (BR); Gregory J. Brennan, Angleton, TX (US); Elva L. Lugo, Manvel, TX (US); Yongchao Zeng, Houston, TX (US); Brayden E. Glad, Manvel, TX (US); Jon W. Hobson, Lake Jackson, TX (US); and Linfeng Chen, Missouri City, TX (US)
Assigned to Dow Global Technologies LLC, Midland, MI (US)
Appl. No. 17/615,352
Filed by Dow Global Technologies LLC, Midland, MI (US)
PCT Filed May 29, 2020, PCT No. PCT/US2020/035208 § 371(c)(1), (2) Date Nov. 30, 2021, PCT Pub. No. WO2020/243487, PCT Pub. Date Dec. 3, 2020.
Claims priority of provisional application 62/855,418, filed on May 31, 2019.
Prior Publication US 2022/0220292 A1, Jul. 14, 2022
Int. Cl. C08L 23/08 (2025.01); C08F 210/02 (2006.01); C08F 210/16 (2006.01); C08J 5/18 (2006.01); C08L 23/06 (2006.01); C08L 23/0807 (2025.01)

CPC C08L 23/0815 (2013.01) [C08F 210/02 (2013.01); C08F 210/16 (2013.01); C08J 5/18 (2013.01); C08L 23/06 (2013.01); C08L 23/08 (2013.01); C08L 23/0807 (2013.01); C08J 2323/06 (2013.01); C08J 2323/08 (2013.01); C08J 2423/06 (2013.01); C08L 2203/16 (2013.01); C08L 2205/025 (2013.01); C08L 2207/066 (2013.01)]

13 Claims

1. A linear low density polyethylene (LLDPE) polymer comprising

an LLDPE that is the polymerized reaction product of ethylene monomer and C₃-C₁₂olefin comonomer;

wherein the LLDPE has a density from 0.904 to 0.925 g/cc; a melt index (I₂) of 0.5 to 1.5 g/10 minutes when measured according to ASTM1238 under a load of 2.16 kg at a temperature of 190° C.; a melt flow ratio I₁₀/I₂of 6.5 to 7.6, wherein I₁₀is measured according to ASTM1238 at a temperature of 190° C. with 10 kg load; and a molecular weight distribution (MWD=Mw/Mn) of 2.5 to 3.6 when measured according to gel permeation chromatography;

wherein the LLDPE comprises a short chain branching distribution defined by:

a copolymer fraction greater than 85%, the copolymer fraction being defined of a ratio of the mass eluted at temperatures from greater than 35° C. to less than 95° C. to the total mass eluted when measured using an improved comonomer content distribution (iCCD) curve of mass eluted versus temperature;

a high density fraction from 3.5 to 7.0%, the high density fraction being defined as a ratio of the mass eluted at temperatures at or above 95° C. to the total mass; and

a soluble fraction from 1.0-10.0%, the soluble fraction being defined as a ratio of the mass eluted at temperatures at or below 35° C. to the total mass.