Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1991-12-19
1992-09-15
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 78, 521182, 521183, 521184, 521189, C08J 928, C08J 930, C08J 932
Patent
active
051478951
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 polymners that are not readily shaped by melt processing means.
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G. W. Halldin & M. R. Shah Compaction of Polymer Powders SPE, 39th ANTEL, Boston May 4-7, 1981 pp. 353-355.
George E. Long, AMP Inc. Spraying Theory and Practice "Chemical Engineering" Mar. 13, 1978 pp. 73-77.
S. C. Tsai, B. Viers, and D. Botts. Effects of Pseudoplastic Behavior in Airblast Atomization of Viscous Liquids ASME Fluids Eng. Div. (1988) vol. 75 pp. 225-231.
Hughes O. Richard
Kurschus Dieter
Foelak Morton
Hoechst Celanese Corp.
Hunter, Jr. James M.
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