Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Patent
1992-08-10
1993-09-21
Teskin, Fred
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
528491, 528494, 5253338, 525387, 525938, C08F 624, C08F 850
Patent
active
052467791
ABSTRACT:
The present invention is directed to improved microfine propylene polymer powders having reduced fines which are comprised of spherical or substantially spherical particles and have a number average particle size from about 25 to about 60. A process for preparing the improved powders is also provided. The process involves dispersing a molten propylene homopolymer or copolymer which has been visbroken in a liquid medium in the presence of a nonionic surfactant, cooling the dispersion below the melt point of the propylene polymer and recovering the powder.
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Product Finishing, pp. 22-27 (9/1990).
Heimberg Manfred
Ondrus Daniel J.
Baracka Gerald A.
Quantum Chemical Corporation
Teskin Fred
Tremain Kenneth D.
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