Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymerizing in reactor of specified material – or in reactor...
Patent
1979-12-03
1981-03-17
Silverberg, Sam
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymerizing in reactor of specified material, or in reactor...
422131, 422241, C08F 330, C08F 111, C08F 188
Patent
active
042568641
ABSTRACT:
This invention relates to the reduction of polymer buildup on the inner surfaces of a polymerization reaction vessel by applying a coating to the inner surfaces thereof. An approximate monolayer coating on the inner surfaces of the reactor results from applying thereto an aqueous solution of a hydrophilic polymer-inhibitor complex, for example, such as a complex of polyvinyl alcohol and the disodium salt of bisphenol A. 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 buildup on the inner surfaces of the reaction vessel is substantially eliminated.
REFERENCES:
patent: 3669946 (1972-06-01), Koyanaki
patent: 4007320 (1977-02-01), Petersen
Silverberg Sam
The B. F. Goodrich Company
Wymbs Roy P.
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