B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
402/396, 23/431,
B01J 19/10 (2006.01) C08F 2/00 (2006.01)
Patent
CA 1195450
ABSTRACT OF THE DISCLOSURE This invention relates to the reduction of polymer buildup on the inner surfaces of a polymeriza- tion reactor by applying a polymer buildup resistant coating material to the inner surfaces thereof, the method or process of applying said coating being the subject of this invention. An approximate monolayer coating on the inner surfaces of the reactor results from applying thereto an aqueous or organic solvent solution of the coating material by means of steam, and preferably, superheated steam, said coating material being an organic compound or polymer which is capable of resisting polymer buildup thereon. As examples of such materials there may be named the polyaromatic amines, self-condensed polyhydric phenols, tannic acid and tannates, various dyes such as nigrosine, and the like, etc. When using steam to apply the coating material, the same reaches the reactor surfaces in the form of a melted mist. When polymerizing olefinic monomers, such as vinyl halides, vinylidene halides, and vinylidene monomers having at least one terminal Image grouping, and mixtures thereof, in the presence of said coating, polymer buildup on the inner surfaces of the reaction vessel is substantially eliminated.
327969
Miller Richard K.
Norris James R. Jr.
Witenhafer Donald E.
Goodrich (b.,f.) Company (the)
Marcoux & Sher Swabey Mitchell Houle
Oxy Vinyls L.p.
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