Plastic and nonmetallic article shaping or treating: processes – Formation of solid particulate material directly from molten... – Coated particles
Patent
1996-04-09
1998-06-16
Simmons, David A.
Plastic and nonmetallic article shaping or treating: processes
Formation of solid particulate material directly from molten...
Coated particles
264 14, B29B 910, B29C 3502
Patent
active
057665214
ABSTRACT:
The present invention relates to a novel presentation of a product exhibiting the phenomenon of supercooling. More precisely, the subject of the invention is cristallized pearls of a product exhibiting strong supercooling. The invention also relates to the preparation of the said pearls. The characteristic feature of the process of the invention is to melt, if necessary, the product to be shaped; to break up the molten mass into droplets; to cool the droplets to a temperature below the glass transition temperature of the product, so that these droplets harden by vitrification; to maintain the pearls thus vitrified at a temperature below the glass transition temperature and to place them in contact with crystallization seeds; to crystallize the pearls by raising the temperature above the glass transition temperature and then to recover the crystallized pearls.
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Le Thiesse Jean-Claude
Statiotis Eraclis
Carleton Katherine L.
Jones Kenneth M.
Rhone-Poulenc Chimie
Seugnet Jean-Louis
Simmons David A.
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