申请人:Formosa Plastics Corporation, U.S.A.
公开号:US07790819B1
公开(公告)日:2010-09-07
Cyclic organosilicon compounds that may be employed as an electron donor for polymerization catalyst systems, polymerization catalyst systems employing the cyclic organosilicon compounds as an electron donor, methods of making the polymerization catalyst systems, and polymerization processes to produce polyolefin are disclosed. The organosilicon compounds, which are useful as electron donors in polymerization catalyst systems for the production of polyolefins, are represented by the formula:
where Q1, Q2, Q3, and Q4 may be identical or different and are each hetero-atoms selected from the group consisting of N, O, S, Si, B, and P. R1, R2, R3, and R4 may be identical or different and are each hydrocarbon-based substituents to Q1, Q2, Q3, and Q4, respectively. The subscripts i, j, m, and n are independently 0 to 3 R5 and R6 may be identical or different and are each a bridging group with a backbone chain length between the two hetero-atoms Q1 and Q3, and Q2 and Q4, respectively, 1-8 atoms. The bridging group is selected from the group consisting of aliphatic, alicyclic, and aromatic bivalent radicals.
本文介绍了可作为聚合催化剂体系中电子给体的环状有机硅化合物,采用环状有机硅化合物作为电子给体的聚合催化剂体系,制备聚合催化剂体系的方法以及生产聚烯烃的聚合过程。这些有机硅化合物在聚合催化剂体系中作为电子给体,用于生产聚烯烃。它们的化学式如下:其中Q1、Q2、Q3和Q4可以相同也可以不同,分别是从N、O、S、Si、B和P中选择的杂原子。R1、R2、R3和R4可以相同也可以不同,分别是与Q1、Q2、Q3和Q4相应的基团。下标i、j、m和n是独立的,可以是0到3。R5和R6可以相同也可以不同,分别是具有1-8个原子的桥接基团,其主链长度在Q1和Q3以及Q2和Q4之间。这些桥接基团来自于脂肪族、环状和芳香族双价基团的选择。