公开(公告)号：US5084540A

公开(公告)日：1992-01-28

申请号：US616767

申请日：1990-11-20

申请人： Enrico Albizzati ,  Umberto Zucchini ,  Arrigo Soverini ,  Illaro Cuffiani

发明人： Enrico Albizzati ,  Umberto Zucchini ,  Arrigo Soverini ,  Illaro Cuffiani

IPC分类号： C08F2/00 ,  C08F2/34 ,  C08F4/00 ,  C08F4/60 ,  C08F10/00 ,  C08F210/00 ,  C08F210/02 ,  C08F210/16

CPC分类号： C08F210/16

摘要： Crystalline copolymers of ethylene and alpha-olefins CH.sub.2 .dbd.CHR in which R is an alkyl group having 2 to 8 carbon atoms, containing 0.5 to 3% by moles of polymerized alpha-olefin and having a density lower than 0.945 g/cc are obtained by polymerizing, in the gas phase, mixtures of ethylene and the alpha-olefins in contact with catalysts prepared from (1) Ti compounds supported on Mg halides and (2) organometallic compounds, which are active in the polymerization of ethylene but exhibit little, if any, activity in the homo- or copolymerization of the alpha-olefins.

摘要翻译： 乙烯和α-烯烃CH 2 = CHR的结晶共聚物，其中R为具有2-8个碳原子的烷基，含有0.5-3％（摩尔）聚合的α-烯烃，密度低于0.945g / cc，通过 在气相中聚合乙烯和α-烯烃的混合物与由（1）负载在卤化镁上的Ti化合物和（2）有机金属化合物制备的催化剂接触，所述有机金属化合物在乙烯的聚合中是有活性的，但是如果 任何在α-烯烃的均聚或共聚中的活性。

公开(公告)号：US4188470A

公开(公告)日：1980-02-12

申请号：US868618

申请日：1978-01-11

申请人： Amilcare Collina ,  Arrigo Soverini ,  Francesco Rosati

发明人： Amilcare Collina ,  Arrigo Soverini ,  Francesco Rosati

IPC分类号： C08F2/00 ,  C08F2/34 ,  C08F4/00 ,  C08F4/60 ,  C08F110/02 ,  C08F4/02 ,  C08F10/02

CPC分类号： C08F110/02 ,  Y10S526/901 ,  Y10S526/904

摘要： Ethylene is polymerized in a gaseous phase and in contact with a Ziegler/Natta type solid catalyst capable of producing polyethylene in the form of granules having an easily controllable and homogeneous granulometric size, the polymerization being conducted in a tubular reactor in which the catalyst and the polymer granules which are formed are carried along the reactor by the flow of the gas.

摘要翻译： 乙烯在气相中聚合并与能够生产具有容易控制和均匀的粒度尺寸的颗粒形式的聚乙烯的齐格勒/纳塔型固体催化剂接触，聚合在管式反应器中进行，其中催化剂和 形成的聚合物颗粒通过气体的流动沿反应器携带。