公开(公告)号：US20220306849A1

公开(公告)日：2022-09-29

申请号：US17771135

申请日：2020-10-13

申请人： Celanese International Corporation

发明人： Antonios K. Doufas ,  Krishnan Anantha Narayana Iyer ,  Zerong Lin ,  Ranadip Ganguly

IPC分类号： C08L23/12 ,  C08F210/18 ,  C08K3/22 ,  C08K5/098

摘要： The present disclosure relates to a thermoplastic vulcanizate including a polypropylene and a copolymer. The copolymer may have an ethylene content, a propylene content, and an a, α,ω-diene content. The thermoplastic vulcanizate has a shore hardness of about 20 Shore A or greater. Alternatively, a thermoplastic vulcanizate may include a polypropylene and an elastomeric polymer and have a shore hardness of about 50 MPa or greater, a tensile strength at yield of about 18 MPa or greater, and an oil swell of about 15% weight gain or less. Additionally, the present disclosure relates to processes for producing thermoplastic vulcanizates. A process may include introducing a catalyst and propylene to a first reactor to form a first polymer, and introducing the first polymer, ethylene, at least one α,ω-diene, and optionally additional propylene to a second reactor to form an impact copolymer. The process may further include crosslinking the impact copolymer.