Process for preparing long-chain polymethylene halide telomers
A process comprises combining in a batchwise, semi-continuous, or continuous manner, or a combination thereof, in the presence of at least one free radical initiator, and at a temperature sufficient to cause the initiator to fragment to form free radicals, (a) at least one telogen selected from (1) fluoroalkyl halides that comprise at least one halomethylene moiety (—CHX—) and, optionally, at least one non-fluorine heteroatom, and (2) perfluoroalkyl halides that comprise at least one halofluoromethylene moiety (—CFX—) and at least one non-halogen heteroatom, the halides being selected from iodides and bromides; and (b) ethylene; the telogen and the ethylene being combined in total amounts such that the number of moles of ethylene per mole of telogen is at least about 4.
3M Innovative Properties Company
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Yu George G. I.
Yang Moore