US 11,905,401 B2
Thermoplastic vulcanizate compositions
Antonios K. Doufas, Houston, TX (US); Krishnan Anantha Narayana Iyer, Pearland, TX (US); Eric P Jourdain, Rhode Saint Genese (BE); Michael J. Goncy, Mont Belvieu, TX (US); Kelly Kirkendall, Deer Park, TX (US); and Katya N. Reyna, Kemah, TX (US)
Assigned to Celanese International Corporation, Irving, TX (US)
Filed by Celanese International Corporation, Irving, TX (US)
Filed on Apr. 25, 2022, as Appl. No. 17/728,367.
Application 17/728,367 is a continuation of application No. 16/981,345, granted, now 11,312,847, previously published as PCT/US2019/024745, filed on Mar. 29, 2019.
Claims priority of provisional application 62/682,380, filed on Jun. 8, 2018.
Claims priority of provisional application 62/655,573, filed on Apr. 10, 2018.
Prior Publication US 2022/0251362 A1, Aug. 11, 2022
Int. Cl. C08L 23/30 (2006.01); C08L 23/32 (2006.01); C08L 23/36 (2006.01); C08L 23/16 (2006.01)
CPC C08L 23/16 (2013.01) [C08L 23/30 (2013.01); C08L 23/32 (2013.01); C08L 23/36 (2013.01); C08L 2205/22 (2013.01); C08L 2207/00 (2013.01); C08L 2207/04 (2013.01); C08L 2207/06 (2013.01)] 10 Claims
 
1. A thermoplastic vulcanizate composition comprising:
a thermoplastic phase and an ethylene-propylene-diene terpolymer, wherein the thermoplastic vulcanizate composition has:
a hardness of from 20 Shore A to 60 Shore D; and
a stress relaxation slope of −1 to −5 (1/min) as measured according to ISO 3384A using a stress relaxation instrument.