| http://www.w3.org/ns/prov#value | - A composition as defined in claim 1 wherein said chlorinated and brominated aluminum compounds have the formula: Al(R3 R4 R5).sub.(3-a) Xa, wherein each of R3, R4, and R5 is a hydrocarbyl radical selected from the group consisting of alkyl radicals having from about one to about 24 carbon atoms, aryl radicals having from about six to about 20 carbon atoms, alkenyl radicals having from about one to
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