The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 27, 2015
Filed:
May. 28, 2013
China Petroleum & Chemical Corporation, Beijing, CN;
Beijing Research Institute of Chemical Industry, China Petroleum & Chemical Corporation, Beijing, CN;
Aimin Liang, Beijing, CN;
Jie Zhang, Beijing, CN;
Jiangwei Zhao, Beijing, CN;
Chuanqing Li, Beijing, CN;
Lin Xu, Beijing, CN;
Ximing Xie, Beijing, CN;
Guozhu Yu, Beijing, CN;
Sufang Ouyang, Beijing, CN;
Jinmei Tan, Beijing, CN;
Liangliang Yang, Beijing, CN;
Wei Sun, Beijing, CN;
Yishuang Xin, Beijing, CN;
Abstract
The method for preparation of polyisoprene includes conducting polymerization reaction of isoprene in a first organic solvent under the presence of rare earth catalyst I and rare earth catalyst II, to obtain polyisoprene with bimodal molecular weight distribution, wherein the polymerization reaction conditions are controlled to ensure the peak molecular weight of the high molecular weight component fraction in the polyisoprene is 1×10-2×10and the peak molecular weight of the low molecular weight component fraction is 2×10-4×10, and the weight ratio of content of the high molecular weight component fraction to the low molecular weight component fraction is 1-25:1. The molecular weight distribution of the polyisoprene obtained with the method provided is bimodal distribution; therefore, the polyisoprene not only has the mechanical properties of polyisoprene with high molecular weight, but also has the processability of polyisoprene with low molecular weight.