公开(公告)号：US20250011479A1

公开(公告)日：2025-01-09

申请号：US18751816

申请日：2024-06-24

Applicant: QINGDAO UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Chunyu ZHANG ,  Yingnan ZHAO ,  Lihua NA ,  Heng LIU ,  Xuequan ZHANG

IPC: C08F4/80 ,  C08F2/06 ,  C08F6/10 ,  C08F36/06 ,  C08F36/08

Abstract: Disclosed are an iron-based catalyst and its application catalytic diene polymerization. The iron-based catalyst provided by the present application includes iron-containing organic compounds, alkyl aluminum compounds and isocyanide-containing organic compounds, and the molar ratio between the iron element of the iron-containing organic compounds, the alkyl aluminum compounds and the isocyanide-containing organic compounds is 1:(5˜100):(0.5˜100). The iron-based catalyst system of the present application can initiate polymerization of diene with high activity at high temperature by using isocyanide-containing organic compounds as an electron donor and alkyl aluminum compounds as a co-catalyst.

公开(公告)号：US20250011515A1

公开(公告)日：2025-01-09

申请号：US18751843

申请日：2024-06-24

Applicant: QINGDAO UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Chunyu ZHANG ,  Shiliang XU ,  Yao YU ,  Heng LIU ,  Xuequan ZHANG

IPC: C08F236/06

Abstract: Disclosed is a method of adjusting the molecular weight of syndiotactic 1,2-polybutadiene prepared using an iron-based catalyst. In the present application, when an iron-based catalyst catalyzes the polymerization of butadiene to prepare syndiotactic 1,2-polybutadiene, alpha-olefins are added as a molecular weight regulator, and a chain transfer effect is achieved through competitive adsorption. At the same time, since alpha-olefins are stable to iron-based catalysts, cannot be initiated to polymerize, and are easy to separate from butadiene, they have a significant effect on molecular weight regulation and do not have a significant effect on activity, making it possible to prepare syndiotactic 1,2-polybutadiene thermoplastic elastomers with number average molecular weights ranging from 3,000-250,000. The syndiotactic 1,2-polybutadiene rubber prepared by the present application has better processability. The present application has the advantages of low attenuation of iron-based catalyst activity, a broad range of molecular weight adjustment and facile butadiene separation.