Chemistry: physical processes – Physical processes – Crystallization
Patent
1977-03-28
1978-03-28
Dixon, Jr., William R.
Chemistry: physical processes
Physical processes
Crystallization
23288E, 427230, 427236, 427239, 428 35, 526 62, B01J 800
Patent
active
040812480
ABSTRACT:
This invention relates to a polymerization reactionvessel having an approximate monolayer coating on the inner surface thereof resulting from applying thereto an aqueous alkali metal hydroxide coating solution containing a straight chain or branched polyaromatic amine and a dispersant operable in aqueous media, such as, for example, polyvinyl alcohol. When polymerizing olefinic monomers, such as vinyl halides, vinylidene halides, and vinylidene monomers having at least one terminal CH.sub.2 .dbd.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. Further, multiple charges or batches of polymer can be made in said internally coated reaction vessel without opening the same between charges thus preventing the escape of unreacted monomer to the atmosphere.
REFERENCES:
patent: 3825434 (1974-07-01), Berens et al.
patent: 3849179 (1974-11-01), Morningstar
patent: 4007320 (1977-02-01), Peterson
patent: 4024301 (1977-05-01), Witenhafer et al.
patent: 4024330 (1977-05-01), Morningstar et al.
Dixon Jr. William R.
The B. F. Goodrich Company
Wymbs Roy P.
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