Coating processes – Solid particles or fibers applied – Applying superposed diverse coatings or coating a coated base
Patent
1982-09-07
1984-01-24
Morgenstern, Norman
Coating processes
Solid particles or fibers applied
Applying superposed diverse coatings or coating a coated base
427184, 427214, 427221, 427240, 427242, 4273855, 427399, B05D 136, B05D 700
Patent
active
044277199
ABSTRACT:
Method of dedusting granules of agricultural micronutrient metal sulfates by coating the granules with a monomeric liquid, which is catalytically polymerizable by the metal sulfates, and contacting the dust particles with the coated granules while the monomeric liquid is polymerized through an adhesive stage to a hard dry coating which occludes substantially all of the dust particles on the surface of the granules. Aqueous methylol and methylene ureas, partially condensed urea-formaldehyde solutions containing some free urea, and cane molasses are effective monomeric liquids for dedusting sulfates, oxysulfates, and mixtures of micronutrient metals, including: zinc, manganese, iron, copper, and lead. The dedusting method is effective in improving the condition of the granules when a small amount of conditioner such as clay is added as a dust. The conditioner occluded on the surface of the granule provides an effective base for coloring the granules with dye solutions.
REFERENCES:
patent: 3278325 (1966-10-01), Wissinger
patent: 3360395 (1967-12-01), Blevenstein
patent: 3953657 (1976-04-01), Yamaguchi et al.
patent: 3991225 (1976-11-01), Blouin
patent: 4023981 (1977-05-01), Perronin et al.
patent: 4304588 (1981-12-01), Moore
Tisdale and Nelson, Soil Fertility and Fertilizers, 2nd Edition, the Macmillan Company, New York, 1966, pp. 342, 391, 392, 395.
Meyer, Urea-Formaldehyde Resins, Addison-Wesley Publishing Company, Reading, Massachusetts, 1979, p. 207.
Bell Janyce A.
Frit Industries, Inc.
Morgenstern Norman
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