Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1983-04-06
1984-04-10
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
422134, 422135, 422138, 526 65, C08F 206
Patent
active
044422733
ABSTRACT:
A process and apparatus for the continuous polymerization of monovinyl aromatic monomers, such as styrene, to produce a substantially monodisperse polymer, wherein a solution of monomer in an inert solvent and a hydrocarbyllithium initiator are fed to the bottom zone of a sealed, cylindrical, pressurized, vertical reactor having a plurality of zones, with separation plates separating the reactor into a bottom, a plurality of intermediate, and top zones, the separation plates each having a central aperture, and a mixing means for each zone has a shaft extending through the apertures to provide an annular space for flow of fluid through the zones, the annular space between each separation plate and the shaft of the mixing means being of a size to provide a pressure differential between adjacent zones of less than about one pound per square inch, a substantially monodisperse polymer in solution discharged from the top zone of the reactor.
REFERENCES:
patent: 3262922 (1966-07-01), Payne
patent: 3324093 (1967-06-01), Alleman
patent: 3801555 (1974-04-01), Johnson
patent: 4311803 (1982-01-01), Smith et al.
Bullano Gerald A.
DiLullo Robert J.
Neiditch David S.
Ofstein David E.
Atlantic Richfield Company
Michl Paul R.
Young Lewis J.
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