	US 11,859,032 B2
	Ethylene-a-olefin-diene elastomers and methods of making them
Crisita Carmen H. Atienza, Houston, TX (US); Rhutesh K. Shah, Katy, TX (US); Ron Walker, Pearland, TX (US); John R. Hagadorn, Houston, TX (US); and Sudhin Datta, Houston, TX (US)
Assigned to ExxonMobil Chemical Patents Inc., Baytown, TX (US)
Filed by ExxonMobil Chemical Patents Inc., Baytown, TX (US)
Filed on May 19, 2021, as Appl. No. 17/324,326.
Application 17/324,326 is a division of application No. 16/250,710, filed on Jan. 17, 2019, granted, now 11,041,034.
Claims priority of provisional application 62/628,420, filed on Feb. 9, 2018.
Prior Publication US 2021/0269567 A1, Sep. 2, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C08F 210/16 (2006.01); C08F 210/02 (2006.01); C08F 210/06 (2006.01); C08F 236/04 (2006.01); C08F 236/20 (2006.01); B01J 31/18 (2006.01); C08F 4/64 (2006.01)

CPC C08F 210/16 (2013.01) [B01J 31/183 (2013.01); C08F 4/64113 (2013.01); C08F 210/02 (2013.01); C08F 210/06 (2013.01); C08F 236/04 (2013.01); C08F 236/20 (2013.01); B01J 2231/12 (2013.01); B01J 2531/49 (2013.01); C08F 2800/20 (2013.01)]

14 Claims

1. A branched ethylene-a-olefin diene elastomer (b-EDE) comprising within a range from 40 to 80 wt % of ethylene-derived units by weight of the b-EDE, 0.05 to 2 wt % of dual-polymerizable diene derived units by weight of the b-EDE, and 0.1 to 2 wt % of singly-polymerizable diene derived units by weight of the b-EDE, the remainder comprising C3 to C12 a-olefin derived units, wherein the b-EDE has a weight average molecular weight (Mw) within a range from 100 kg/mole to 750 kg/mol, wherein the b-EDE has a g′_avgof 0.90 or more, and a g′₁₀₀₀of less than 0.9.