Method for forming homogeneous blends of particulate materials
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United States of America Patent
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Apr 17, 1990
Grant Date -
N/A
app pub date -
Nov 16, 1988
filing date -
Nov 16, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A mixture of unlike particulate solids is dispersed in liquid nitrogen to form a slurry. The slurry is then subjected to shear and impact forces of sufficient intensity and duration to break up agglomerates, to comminute at least the larger particles, and to obtain a randomly mixed homogeneous suspension. The suspension is thereafter stabilized by removal of liquid nitrogen to form a past or powder which may be further processed into shapes by extrusion or molding. One preferred embodiment utilizes a batch-to-continuous process for the compounding of rubber with carbon black and other additives.
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