Plastic and nonmetallic article shaping or treating: processes – Formation of solid particulate material directly from molten... – By extrusion spraying or gravity fall through orifice
Patent
1975-02-20
1977-01-11
Morris, Theodore
Plastic and nonmetallic article shaping or treating: processes
Formation of solid particulate material directly from molten...
By extrusion spraying or gravity fall through orifice
106270, 208 21, 260 285D, 44 75, B22D 2308, C08L 9108
Patent
active
040027066
ABSTRACT:
Wax powders of improved hardness and/or free-flowing properties are produced from blends containing a high content (e.g. 20 - 80%) of soft wax and a harder or higher melting wax component. The molten blend is sprayed and chilled in the form of droplets predominantly between 0.2 and 1 mm in diameter, to solidify rapidly while in suspension. The harder, higher melting components selectively solidify in the outermost region of the particles.
The wax powder so obtained is superior to powders obtained by casting the blend into blocks, followed by milling.
Typical powders are useful for candle extrusion and chipboard manufacture and as internal and external lubricants for plastics, e.g. polyvinylchloride.
REFERENCES:
patent: 2136282 (1938-11-01), Dickinson
patent: 3594209 (1971-07-01), Kosche et al.
patent: 3804744 (1974-04-01), Fera
Chem Abstract 70:81:162z.
Morris Theodore
Stoltz Melvin I.
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