Continuous process and device for the manufacture of a vinyl chl

Details Continuous process and device for the manufacture of a vinyl chl Continuous process and device for the manufacture of a vinyl chl

1981-07-30

1984-01-03

Levin, Stanford M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

422134, 526 62, 526 65, 526330, 5263442, C08F 218, C08F 220

Patent

active

044243014

ABSTRACT:
In the manufacture of polymer suspensions, good spacetime yields, a narrow particle size distribution and good polymer properties are obtained in a relatively uncomplicated apparatus which includes a plurality of reactors having a length/diameter ratio of at least 4, the first reactor standing vertically and the others approximately horizontally. Plug flow of the polymerization mixture is maintained in the reaction zones provided by the reactors. In the first such zone, up to 10% of the polymerization is carried out, with agitation, preferably at a stirring energy per unit volume of 0.1 to 5 kWm.sup.-3. Wall encrustation is substantially prevented, particularly in the second reaction zone, through the use of smooth, non-metallic surfaces in the zone.

REFERENCES:
patent: 3004013 (1961-10-01), Kircher et al.
patent: 3562238 (1971-02-01), Parks
patent: 3678021 (1972-07-01), Chatelain et al.
patent: 4180634 (1979-12-01), Koyanagi et al.
patent: 4209600 (1980-06-01), Tytgat et al.

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