-
公开(公告)号:US06855783B2
公开(公告)日:2005-02-15
申请号:US10412372
申请日:2003-04-11
申请人: William J. Gauthier , Margaret Kerr , Jun Tian , David J. Rauscher , Constance Hayworth Patrick , Shady Henry
发明人: William J. Gauthier , Margaret Kerr , Jun Tian , David J. Rauscher , Constance Hayworth Patrick , Shady Henry
IPC分类号: B01J31/00 , B01J37/00 , C07F9/00 , C07F11/00 , C07F17/00 , C08F4/02 , C08F4/42 , C08F4/44 , C08F4/60 , C08F4/659 , C08F4/6592 , C08F10/00 , C08F110/02 , C08F110/06
CPC分类号: C08F10/00 , C08F4/65912 , C08F4/65927 , C08F110/06 , Y10S526/943 , C08F4/65916 , C08F2500/18 , C08F2500/03 , C08F2500/12 , C08F2500/17 , C08F2500/15
摘要: Supported metallocene catalysts and processes for the use of such catalysts in isotactic polymerization of a C3+ ethylenically unsaturated monomer. The supported catalysts comprise a particulate silica support, an alkyl alumoxane component, and a metallocene catalyst component. The support has an average particle size of 10-50 microns, a surface area of 200-800 m2/g and a pore volume of 0.9-2.1 milliliters per gram (ml/g). Alumoxane is incorporated onto the support to provide a weight ratio of alumoxane to silica of at least 0.8:1. The metallocene is present in an amount of at least 1 weight percent of the silica and the alumoxane and is of the formula B(CpRaRb)(Fl′)MQ2 in which Fl′ is an unsubstituted fluorenyl group or a fluorenyl group symmetrically substituted at the 3 and 6 positions, B is a structural bridge between Cp and Fl′, Ra is a bulky substituent in a distal position, Rb is a less bulky substituent proximal to the bridge and non-vicinal to the distal substituent, M is a Group IVB transition metal or vanadium, and Q is a halogen or a Cl-C4 alkyl group.
摘要翻译: 负载型金属茂催化剂和在C3 +烯属不饱和单体的全同立构聚合中使用这种催化剂的方法。 载体催化剂包括颗粒二氧化硅载体,烷基铝氧烷组分和茂金属催化剂组分。 载体的平均粒度为10-50微米,表面积为200-800平方米/克,孔体积为0.9-2.1毫升/克(毫升/克)。 将Alumoxane加入到载体上以提供至少0.8:1的铝氧烷与二氧化硅的重量比。 金属茂的存在量为二氧化硅和铝氧烷的至少1重量%,并且具有式B(CpRaRb)(F1')MQ2,其中F1'是未取代的芴基或在该位置上对称取代的芴基 3和6位,B是Cp和Fl'之间的结构桥,Ra是远端位置的大体积取代基,Rb是靠近桥的较不庞大的取代基,而与远端取代基不相邻,M是IVB族 过渡金属或钒,Q是卤素或C 1 -C 4烷基。
-
2.
公开(公告)号:US07220806B2
公开(公告)日:2007-05-22
申请号:US11119243
申请日:2005-04-29
申请人: William John Gauthier , Jun Tian , David John Rauscher , Constance Hayworth Patrick , Shady Nader Henry , Nathan Williams
发明人: William John Gauthier , Jun Tian , David John Rauscher , Constance Hayworth Patrick , Shady Nader Henry , Nathan Williams
CPC分类号: C08F210/16 , C08F4/65912 , C08F10/00 , C08F210/06 , C08F2500/03 , C08F2500/20 , C08F4/65927
摘要: A process for preparing low melting copolymers comprising contacting a mixture of olefin monomers with a CpFlu-type metallocene catalyst under reaction conditions sufficient to form a copolymer. The copolymers thus prepared desirably display melt temperatures from about 100° C. to about 140° C. and may be produced with reduced amounts of ethylene. The copolymers may also exhibit reduced levels of undesirable xylene solubles, relatively narrow molecular weight distribution, and other improved optical and physical properties.
摘要翻译: 一种制备低熔点共聚物的方法,包括使烯烃单体的混合物与CpFlu型金属茂催化剂在足以形成共聚物的反应条件下接触。 如此制备的共聚物理想地显示约100℃至约140℃的熔融温度,并且可以用减少量的乙烯制备。 共聚物也可以表现出不希望的二甲苯可溶物的水平降低,分子量分布相对窄,以及其他改进的光学和物理性能。
-