Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Patent
1987-09-17
1989-09-26
Lesmes, George F.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
166280, 427212, 427214, 427221, 428403, 428404, 428406, 428407, B05D 700
Patent
active
048699608
ABSTRACT:
Ceramic particulate useful as a proppant in hydraulic fracturing and in gravel packing operations is provided which comprises a ceramic (sometimes vitreous) core surrounded by an epoxy resin coating. Novolac epoxy resin compounds without any substantial acid soluble filler are used to coat ceramic particulates similar to those disclosed in U.S. Pat. Nos. 4,680,230 and 4,632,876. The result is a product which combines the excellent solvent resistance of the ceramics with the acid resistance of the resin. The resin coating gives the added benefits of lower specific gravity and improved crush resistance.
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"ECN 1235, 1273, 1280, 1299 Novolac Epoxy Resins", Resins Department, CIBA-GEIGY Corporation, 1982, Product Data.
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Berntson Leslie G.
Gibb James L.
Laird James A.
Kirn Walter N.
Lesmes George F.
Little Douglas B.
Minnesota Mining and Manufacturing Company
Monroe James B.
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