Highly porous compressible polymeric powders

Details Highly porous compressible polymeric powders Highly porous compressible polymeric powders

1992-03-17

1992-12-08

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 56, 521 60, 521 63, 521180, C08J 928

Patent

active

051698714

ABSTRACT:
A process for forming polymer powders by dissolving one or more polymers in a suitable solvent, followed by atomizing the solution into a droplet atmosphere of a non-solvent to precipitate polymer particles. The particles are separated from the non-solvent, washed and dried to produce a powder with a rounded particle morphology, high internal porosity and surface area, and high apparent density.
Polymer powders with these properties can be pressed to dense shaped articles suitable for sintering in automated presses because the powders have good low and compressibility characteristics. The process if particularly useful when applied to soluble polymers that are not readily shaped by melt processing means.

REFERENCES:
patent: 4826881 (1989-05-01), Ferguson
patent: 4985468 (1991-01-01), Elmes et al.

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