Chemistry: fertilizers – Processes and products – Organic material-containing
Patent
1987-08-06
1992-06-30
Lander, Ferris
Chemistry: fertilizers
Processes and products
Organic material-containing
71 29, 71 30, 71 6408, 71903, 71904, C05C 900
Patent
active
051259524
ABSTRACT:
A storage-stable dispersion providing melamine in the form of a concentrated liquid for effective use as an end product or as an ingredient for conversion into other products. The dispersion contains melamine particles finer than about 50 microns in diameter, admixed with a chemically inert suspending liquid, having a specific gravity between 0.9 and 1.3 grams per milliliter, containing between 0.03 and 0.20 percent of a chemically inert thickening agent, which interacts physically with the suspending liquid to increase viscosity to between 250 and 3000 centipoise, thereby substantially maintaining the melamine particles in a stable dispersion and preventing their settling. The dispersion composition is an effective form of melamine for accurate dispensing as an agricultural, pulp and paper, or fire-retardant ingredient. Effective thickening agents include xanthan gums, carrageenans, polyacrylamide, chemically treated cellulose, and clays. Nonionic surfactants are helpful in wetting the melamine particles with the suspending liquid. The suspending liquid may be water, aqueous solutions, hydrophilic organic polyols, and high molecular weight organic liquid polyols.
REFERENCES:
patent: 4644015 (1987-02-01), Scaccia et al.
Detrick John H.
Moore William P.
Lander Ferris
Melamine Chemicals, Inc.
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