Impregnating solid polyolefin with small size particles

Details Impregnating solid polyolefin with small size particles Impregnating solid polyolefin with small size particles

1977-06-15

1980-06-10

Derrington, James H.

Coating processes

Solid particles or fibers applied

Fluidized bed utilized

260 42, 427213, B05D 702

Patent

active

042073588

ABSTRACT:
Broadly, finely divided material or particles which are readily carried in or by a gaseous or vaporous fluid are caused to impinge upon solid polyolefin particles to maintain fluidized during contacting by use of a gaseous or vaporous material carrying said particles. In one embodiment, carbon black reactor smoke at a suitable temperature is employed to fluidize a bed of finely divided polyolefin, e.g., polyethylene, thus producing particles of plastic containing carbon black pigment. In this embodiment, off gas from the fluidized zone, preferably on separation from entrained solids, is burned in a wet pellet dryer in which carbon black from a carbon black reactor effluent is processed. Recovered solids can be returned to the fluidized operation. The carbon black-impregnated polyolefin product is recovered from the fluidized bed.

REFERENCES:
patent: 2718471 (1955-09-01), Samler
patent: 2719135 (1965-09-01), Wood
patent: 3030330 (1962-04-01), Cines et al.
patent: 3271185 (1966-09-01), Pollock

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