Sizing and rheology agents for gypsum stucco systems for water resistant panel production

摘要

Emulsions, and processes for making the emulsions, useful for imparting water resistance to gypsum products are disclosed. Process for making the emulsion and gypsum products made from the emulsion are also disclosed. The emulsions of the invention include at least one paraffin wax and a hydrophilic metallic salt. The emulsions of the invention may further include a saponifiable wax substitute for montan wax. The emulsions of the invention may further include a biocide.

主权项

1. An emulsion for providing water-resistance to a gypsum product, comprising:
at least one paraffin wax, wherein each paraffin wax of the at least one paraffin wax, comprises a melting point from about 57° C. and about 66° C., an oil content from about 0.1% to less than 1% by weight of the wax, a flash point from about 200° C. to about 240° C., and an average carbon number of the paraffin from 29 to 32; a saponifiable wax, wherein the saponifiable wax comprises a solidification temperature from about 60° C. to about 90° C., a saponification value from about 30 to about 120, and an acid value from about 10 to about 40; a hydrophilic metallic salt comprising a compound selected from the group consisting of magnesium sulfate, potassium sulfate, lithium sulfate, ammonium sulfate, potassium acetate, ammonium heptamolybdate, and combinations thereof; and water.