Pitch emulsions
AssigneeGeorgia-Pacific Chemicals LLC
InventorsLisa M. Arthur, John B. Hines, Brian L. Swift, Pablo G. Dopico, Michael C. Peck, Roger Scott Johnson
Life of this patent
Estimating the term…
Abstract
An emulsion of pitch in water preferably characterized by having a lower level of tack on drying by virtue of using as the emulsifying agent a fatty acid, a chemically modified fatty acid, a rosin acid, a chemically modified rosin acid, or combinations thereof, especially a tall oil fatty acid, or a chemically modified tall oil fatty acid, where the pitch emulsion is useful for reducing the development of fugitive dust in a dust-forming material.
Claims25
A pitch emulsion comprising particles of a pitch dispersed in water in the presence of an emulsifying agent comprising a fatty acid, a chemically modified fatty acid, a rosin acid, a chemically modified rosin acid, or combinations thereof, wherein the pitch contains from about 60 wt % to about 90 wt % unsaponifiables, based on the total weight of the pitch, and wherein the pitch emulsion forms a tack free film, as measured according to ASTM D 1640-03.
A method of making a pitch emulsion comprising blending a molten pitch containing from about 60 wt % to about 90 wt % unsaponifiables, based on the total weight of the pitch;
- an emulsifying agent comprising a fatty acid, a chemically modified fatty acid, a rosin acid, a chemically modified rosin acid, or combinations thereof;
- and water with sufficient agitation to produce an emulsion, wherein the pitch emulsion forms a tack free film, as measured according to ASTM D 1640-03.
A pitch emulsion comprising particles of a pitch dispersed in water in the presence of an emulsifying agent and associated with a finely divided filler, wherein the pitch contains from about 60 wt % to about 90 wt % unsaponifiables, based on the total weight of the pitch, and wherein the pitch emulsion forms a tack free film, as measured according to ASTM D 1640-03.
Dependencies are inferred from the claim text.