When polymerizing olefinic monomers, such as vinyl halides, vinylidene halides, and {HEAD ~ vinylidene monomers} having {TAIL ~ at least one terminal CH2 =C< grouping}, and mixtures thereof, in the presence of said coating, polymer build up on the inner surfaces of the reaction vessel is substantially eliminated 
When polymerizing olefinic monomers , such as vinyl halides , vinylidene halides , and { HEAD ~ vinylidene monomers } having { TAIL ~ at least one terminal CH2 = C < grouping } , and mixtures thereof , in the presence of said coating , polymer build up on the inner surfaces of the reaction vessel is substantially eliminated
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