Controlling the particle size in the preparation of polymer powd

Details Controlling the particle size in the preparation of polymer powd Controlling the particle size in the preparation of polymer powd

1989-11-13

1991-04-23

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

264 5, 264 12, C08F 234, C08J 312

Patent

active

050101501

ABSTRACT:
The particle size is controlled in the preparation of hydrophilic polymer powders by polymerization of water-soluble monoethylenically unsaturated monomers in a powder bed in the presence of a polymerization initiator and an inert auxiliary liquid by a method in which a solution of the monomers in an inert auxiliary liquid is divided into fine drops with the aid of a multimaterial nozzle which dips into the powder bed, using an inert gas stream, and the particle size of the resulting polymer powder is regulated by varying the amount of inert gas.

REFERENCES:
patent: 4135043 (1979-01-01), Kast et al.

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