申请人:3M Innovative Properties Company
公开号:US20010044515A1
公开(公告)日:2001-11-22
A propylene polymeric composition with elastic character that is soluble in at least one nonpolar organic solvent selected from the group consisting of toluene, xylene, heptane, and hexane, comprises greater than 3 weight percent and up to 45 weight percent homotactic sequences each having only r or m diads, all of which homotactic sequences have a helical length in the range of 20 to 150 Å, and in the range of 55 to 97 weight percent of the sum of homotactic sequences of less than 20 Å in helical length, each homotactic sequence having only r or m diads and having fewer than 10 repeat units with mmmm pentads being present in the range of 0 to 35 weight percent of the total composition, and heterotactic sequences having r and m diads of unequal number, the polymer having a molecular weight (M
w
) of at least 70,000.
一种具有弹性特性且可溶于至少一种非极性有机溶剂中的丙烯聚合物组合物,所述有机溶剂从甲苯、二甲苯、庚烷和己烷组成的群体中选择,包括大于3重量百分比且高达45重量百分比的同向序列,每个序列仅具有r或m二聚体,所有这些同向序列的螺旋长度在20到150Å的范围内,并且小于20Å的同向序列的总和重量百分比在55到97重量百分比的范围内,每个同向序列仅具有r或m二聚体,并且具有少于10个重复单元,其中mmmm五聚体的存在范围为0到35重量百分比,以及具有不同数量的r和m二聚体的异向序列,该聚合物的分子量(Mw)至少为70,000。