Gilsonite Emulsion Compositions
Gilsonite Emulsion Compositions – Emulsion compositions containing substantial amounts of gilsonite consist essentially of a gilsonite phase consisting of a mixture of between about 33 and about 95% gilsonite, and a petroleum hydrocarbon having a boiling point above about 450° F., and a water phase consisting essentially of water and a small amount of emulsifying agent.
SUMMARY OF THE INVENTION
In the present invention there are proposed gilsonite emulsion compositions, particularly useful in the production of insulation board, which emulsions can be conveniently added to a slurry of the wood fiber materials and homogeneously dispersed or mixed therewith, without the necessity of forming and maintaining a melt of asphalt. In the preferred embodiment, an emulsion composition consists of a gilsonite phase having up to 95%, by weight, gilsonite, and a petroleum hydrocarbon having a boiling point above about 450° F., together with a water phase consisting essentially of water and a small amount of emulsifying agent.
DETAILED DESCRIPTION OF THE INVENTION
Compositions of this invention, for some uses, comprise an emulsion consisting essentially of gilsonite, water and a small amount of emulsifying agent, without other materials. The amount of gilsonite present is between about 25 and about 75% by weight of the total emulsion composition. The emulsifying agent may be a cationic, anionic, and/or nonionic emulsifier. Suitable cationic emulsifiers are preferably selected from the group consisting of quaternary ammonium halides, amine acetate salts and alkyl-substituted imidazolines. The specific emulsifiers within this group, and a number of other examples of compounds, as well as commercially available compositions, are described in my U.S. Pat. No. 4,073,659, the full description thereof being incorporated herein by reference. However, other cationic emulsifiers known to those skilled in the art may be used.