High solids content aqueous calcium stearate dispersion suitable

This invention provides a urea-free, high solids content aqueous calcium stearate dispersion suitable for use as an additive in paper or paperboard coating formulations. More particularly, this invention provides a urea-free aqueous calcium stearate dispersion having a solids content of about 60 to about 80 weight percent, the balance being water. The solids portion of the dispersion comprises from about 30 to about 55 weight percent of calcium stearate, from about 10 to about 60 weight percent of at least one straight chain polyhydric alcohol, and up to about 40 weight percent, e.g., 10 to 30 weight percent of starch syrup or sugar. A preferred aqueous calcium stearate dispersion of this invention contains from about 60 to 70 weight percent solids, the balance being water, with the solids portion of the dispersion comprising from about 40 to 50 weight percent of calcium stearate, from about 20 to 40 weight percent of straight chain polyhydric alcohol and from about 15 to about 25 weight percent of starch syrup or sugar. Of course, the relative amount of each ingredient comprising the solids portion of the invention dispersion is selected so that the solids total 100 percent. Calcium stearate is commercially available either in dry powdered form or in the form of aqueous dispersions. In preparing the urea-free, high-solids calcium stearate dispersions of the invention, any commercial aqueous calcium stearate dispersion may be used as a starting material. Alternatively, the starting calcium stearate dispersion may be prepared by dispersing powdered calcium stearate in water using conventional dispersing agents. If you are looking for high quality, high purity, and cost-effective Water-based calcium stearate, or if you require the latest price of Water-based calcium stearate, please feel free to email contact mis-asia.

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