Plastic and nonmetallic article shaping or treating: processes – Forming articles by uniting randomly associated particles – Agitating to form larger particles
Patent
1992-08-03
1997-05-13
Lovering, Richard D.
Plastic and nonmetallic article shaping or treating: processes
Forming articles by uniting randomly associated particles
Agitating to form larger particles
71 6402, 71 6405, 264 293, 264113, 419 64, 419 65, 424470, 501 29, 501135, 514951, B01J 212, C03C 608
Patent
active
056289456
ABSTRACT:
A method for controlling chemical distribution of substances in a solid state (and products produced thereby), the method comprising the steps of mixing particles of a first powder and a triggerable granule facilitator to form first microcapsules, the first microcapsules each having a core of one of the particles and a cladding of the facilitator; and triggering the facilitator while dry mixing the microcapsules to form substantially spherical granules of the microcapsules, the granules each having a controlled chemical distribution.
The method also includes the steps of mixing particles of a second powder with the facilitator to form second microcapsules, the second microcapsules each having a core of one of the particles of the second powder and a cladding of the facilitator; and then mixing the first and the second microcapsules prior to said triggering step.
The method further includes the step of the triggering, mixing the first microcapsules and a second triggerable granule facilitator to form a second cladding on the first microcapsules. To any of the foregoing, there can be the further step of pyrolyzing the microcapsules to remove a portion of the facilitator but leave a resulting pyrolysis product, forming a distribution of the pyrolysis product and the particles. Thereafter, if desired, there follows the step of heating the distribution of the pyrolysis product and the particles to induce a solid state reaction between the pyrolysis product and the particles of the first powder.
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Mort, III Paul R.
Riman Richard E.
Lovering Richard D.
Trzyna Peter K.
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