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    • 67. 发明授权
    • Halogenated organoaluminum compounds and method of preparation
    • US4151113A
    • 1979-04-24
    • US828610
    • 1977-08-29
    • Warren A. Thaler
    • Warren A. Thaler
    • C08F4/00C08F4/42C08F10/10C08F10/14C08F210/00C08F210/12C08F4/52
    • C08F10/10C08F10/14
    • Novel halogenated organoaluminum catalysts are prepared by prereacting a material of the formula:R.sub.m AlX.sub.3-mwherein m is an integer of from 1 to 3 inclusive, R is the same or different alkyl radical of straight or branched chain structure of from 1 to 7 carbons and X is the same or different halogen selected from the group consisting of chlorine and bromine with Y moles of halogen or mixed halogen per mole of aluminum compound wherein the halogen is selected from the group consisting of chlorine and bromine such that (m-Y) is from less than 0.7 to about 0.2. The materials must be prepared sufficiently prior to use to insure extensive reaction of the components to yield an effective polymerization catalyst. Preferably, the components are prereacted for at least 2 minutes, more preferably at least 10 minutes, most preferably at least 4 hours, i.e. (overnight). The catalyst is prepared at any temperature insuring liquid conditions, i.e., -100.fwdarw.+100.degree. C. depending on the components selected for reaction, ambient temperature being most convenient.The compounds are useful as hydrocarbon soluble catalysts and are prepared sufficiently in advance of use to insure complete reaction between the two components yielding the reactive entity. The novel soluble catalysts frequently exhibit higher catalytic activity and efficiency than those of the prior art. They permit polymerization reactions to be run which yield higher molecular weight polymers and copolymers at higher temperatures. The catalysts of the instant invention are particularly useful in the synthesis of highly unsaturated isoolefin multiolefin copolymers of high molecular weight.