Process for producing vinyl chloride-based polymer

Details Process for producing vinyl chloride-based polymer Process for producing vinyl chloride-based polymer

1993-05-19

1994-05-10

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 88, 5263442, C08F 218, C08F 1406

Patent

active

053108329

ABSTRACT:
A process for producing a vinyl chloride-based polymer in which an aqueous suspension of a vinyl chloride-based monomeric material placed in a polymerization vessel equipped with an agitating element is subjected to suspension polymerization by introducing a polymerization initiator to the aqueous suspension at a position located inside the diameter of the agitating element being rotated. By this process it is possible to prevent totally the deposition of polymer scale on the inside wall of the polymerization vessel, particularly in the vicinity of a gas-liquid interface. Therefore, troubles arising from polymer scale formation and labor needed for removing such polymer scale are obviated, and a vinyl chloride-based polymer of high quality can be produced efficiently.

REFERENCES:
patent: 3801560 (1974-04-01), Roll et al.
patent: 3871830 (1975-03-01), Chauvier
patent: 3980628 (1976-09-01), Sorenson et al.
patent: 4163040 (1979-07-01), Van den Bossche

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