| 摘要 |
1526427 Agglomerated polymerization catalyst particles EXXON RESEARCH & ENG CO 24 Oct 1975 [13 Nov 1974] 43803/75 Heading C3P [Also in Division B1] Catalyst fines are agglomerated by working the fines with a particulate polytetrafluoroethylene. The polymer may be used as dry powder or as an aqueous suspensoid. The ingredients are worked together, e.g. under compressive shear, to encourage fibrillation of the polymer to provide a web of fibres to which the fines are attached. The preferred catalysts are of the Ziegler type or a component thereof, e.g. titanium chloride/organoaluminium mixtures or a TiCl 3 .1/3 AlCl 3 component thereof, which may have been ball-milled. They may be used for the polymerization of alpha-olefins, e.g. to produce polypropylene. |
