申请人:The Dow Chemical Company
公开号:US06420507B1
公开(公告)日:2002-07-16
The subject invention is directed to an olefin polymer produced by polymerizing at least one &agr;-olefin in the presence of a Group 4 metal complex comprising an indenyl group substituted in the 2 or 3 position with at least one group selected from hydrocarbyl, perfluoro-substituted hydrocarbyl, silyl, germyl and mixtures thereof, said indenyl group further being covalently bonded to the metal by means of a divalent ligand group, wherein the divalent ligand comprises nitrogen or phosphorus having an aliphatic or alicyclic hydrocarby group covalently bonded thereto via a primary or secondary carbon. Preferred olefin polymers of the invention will be characterized as having a high molecular weight, narrow molecular weight distribution, high vinyl content, and a bimodal DSC melting curve or a deconvoluted ATREF or GPC curve which shows at least two distinct narrow peaks. The olefin polymer will have utility in a variety of applications, including but not limited to films, fibers, foams, molded parts, and as components of formulations such as adhesives, sealants, coatings, caulks, and asphalt.
本发明涉及一种α-烯烃聚合物,其在至少一种含有indanyl基团的第四族金属配合物的存在下聚合得到,所述indanyl基团在2或3位上取代至少一种选自烃基、全氟取代的烃基、硅基、锗基和它们的混合物的基团,所述indanyl基团进一步通过二价配体基团与金属共价键合,其中所述二价配体包括氮或磷,其通过一级或二级碳原子与脂肪族或脂环族碳氢基团共价键合。本发明的优选烯烃聚合物具有高分子量、窄分子量分布、高乙烯含量和双峰DSC熔融曲线或解卷ATREF或GPC曲线,其显示至少两个明显的窄峰。该烯烃聚合物在各种应用中具有实用性,包括但不限于薄膜、纤维、泡沫、模塑件,以及作为配方的组分,如粘合剂、密封剂、涂料、填缝剂和沥青。