Patent ID: 6585820
Filing Date: 2003-07-01
Classification: C04B,C08L

Abstract:
An emulsion useful in providing water resistance to a gypsum product, the emulsion comprising:from about 30 to about 35 weight percent, based on the total weight of the emulsion, a first wax having a melting point of 120Â° F. or greater; from about 3 to about 10 weight percent, based on the total weight of the emulsion, a second wax having a melting point of 180Â° F. or greater the second wax having a saponification value; from about 0.5 to about 10 weight percent, based on the total weight of the emulsion, an alkyl phenol; from about 0.5 to about 5 weight percent, based on the total weight of the emulsion, a co-surfactant, selected from the group consisting of sodium lignosulfate, potassium lignosulfate and trisodium phosphate; from about 0.5 to about 3 weight percent, based on the total weight of the emulsion, an alkali metal hydroxide; from about 55 to about 65 weight percent, based on the total weight of the emulsion, water; and from about 0.25 to about 10 weight percent, based on the total weight of the emulsion, a complexed starch; wherein the alkali metal hydroxide saponifies the second wax to provide a surfactant.