Prevention of PVC polymer buildup in polymerization reactors usi

Details Prevention of PVC polymer buildup in polymerization reactors usi Prevention of PVC polymer buildup in polymerization reactors usi

1978-07-03

1979-03-20

Kight, III, John

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

Synthetic resins

Polymerizing in reactor of specified material, or in reactor...

526 74, C08F 218

Patent

active

041454960

ABSTRACT:
Polymer buildup in polymerization reactions during vinyl chloride polymerizations is greatly reduced by applying a water dispersion of alumina and oxalyl bis(benzylidenehydrazide) (OABH) to the reactor surfaces exposed to the polymerization medium prior to carrying out the polymerization. Long term effects of the buildup preventor can be obtained by applying a caustic wash to the reactor walls, prior to applying the oxalyl bis(benzylidenehydrazide) and alumina dispersion. The effect of the OABH/alumina and caustic is synergistic since the preventative effect is greater than either material used alone.

REFERENCES:
patent: 4068052 (1978-01-01), Weimer et al.

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