Methods for preparation of propylene polymers

US9751965B2 · kind B2 · utility

Assignees

• CHINA PETROLEUM & CHEMICAL CORPORATION · CN
• BEIJING RESEARCH INSTITUTE OF CHEMICAL INDUSTRY, CHINA PETROLEUM & CHEMICAL CORPORATION · CN

Inventors

• Luqiang Yu · Beijing, CN
• Zhichao Yang · Beijing, CN
• Jiangbo Chen · Hangzhou City, CN
• Jianxin Zhang · Acton, US
• Yafeng Du · Beijing, CN
• Qinyu Tong · Beijing, CN
• Kang Sun · Shandong, CN
• Yang Liu · Columbus, US
• Jie Zou · Beijing, CN
• Lusheng WANG · Beijing, CN
• Zengyue Dai · Beijing, CN
• Zhong Tan · Beijing, CN

Key dates

• Filing date: Oct 30, 2013
• Grant date: Sep 5, 2017
• Expiry date: Nov 22, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F10/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Disclosed herein is a polymerization method of propylene, which can prepare a propylene homopolymer with both high fluidity and high rigidity as well as a propylene/α-define copolymer having both high fluidity and a good rigidity-toughness balance by, for example, control of polymerization steps and elevation of polymerization temperature, while the catalyst still maintains a relatively high polymerization activity.