SYNTHESIS OF HIGH VINYL RUBBER

摘要

PROBLEM TO BE SOLVED: To obtain a rubbery polymer having a high vinyl content and a low degree of branching. SOLUTION: The high vinyl rubber is produced by using an initiator system that is composed of (a) a lithium initiator selected from the group consisting of allylic lithium compounds and benzylic lithium compounds, (b) a Group 1 metal alkoxide and (c) a polar modifier wherein the molar ratio of the Group 1 metal alkoxide to the polar modifier is within the range of about 0.1:1 to about 10:1 and wherein the molar ratio of the Group 1 metal alkoxide to the lithium initiator is within the range of about 0.01:1 to about 20:1. COPYRIGHT: (C)2004,JPO