Abstract: Improved asphalt compositions and methods of preparing them. Methods according to the invention include mixing asphalt with lube stock and optionally with a gelling agent, surfactant and fillers. Fibers may, for example, include cellulose fibers, polyolefin fibers, and mineral wool. Inventive compositions provide viscosities suitable for ambient temperature applications as well as mid-temperature applications within the range of 150-275 F.

Abstract: Improved mopping grade asphalt compositions and methods of preparing them. Methods according to the invention include mixing asphalt with a gelling agent such as attapulgite or other clay and with thixotropic agents such as synthetic or organic fillers, and optionally with one or more of ether amine or other surfactants. Thixotropic agents may for example include cellulose fibers, polyolefin fibers, and mineral wool. The asphalt compositions are mixed in a shearing mixer at a temperature high enough to provide substantially uniform dispersion of each of the mixed ingredients in the completed composition. Inventive compositions provide viscosities suitable for application at 200-350 degrees Fahrenheit or lower, excellent adhesion, and superior sag resistance.

Abstract: Method and apparatus for fiber-reinforced mats and asphalt coated sheets for use in roofing and water resistant membranes. Mats and sheets according to the invention exhibit superior tensile strength and resistance to wrinkling. The mat aspect of the invention comprises product and method for producing mats comprised of organic matting materials such as cellulose, paper, other wood products, or felt, and reinforcing fibers such as fiberglass, plastics, and other relatively high-strength natural and synthetic fibers, the fibers being incorporated within the matting material during production of the mat. The sheet aspect of the invention comprises product and method for mats of the type described above with added asphalt coatings to improve the water-proofing qualities of the mats.

Abstract: Fully oxidized cutback asphalts suitable for application in roofing, waterproofing, and sealing applications in all weather conditions, including as mastics and other sealants. Compositions according to the invention comprise unprecedented proportions of solids and asphalts yet remain workable to temperatures as low as 20° F. or below. In addition to fully-oxidized roofing-grade asphalts, preferred compositions according to the invention also comprise hydrophobic agents selected from the group comprising fatty acids and amine compounds and may be applied in rain or other wet conditions, and include polybutene or fatty acid peptizers to control the glass transition temperature of the completed mastic and thereby permit application of the composition at extremely low temperatures. Preferred embodiments optionally also comprise fillers such as cellulose fibers, diatomaceous earth, limestone, and asbestos for various advantageous purposes.

Abstract: A reflective asphalt emulsion is formed by dispersing asphalt into a slurry of colloidal clay at high shear and thereafter blending titanium dioxide and diatomaceous earth filler, and optionally acrylic latex, at low shear into the emulsion of clay and asphalt to form a white to light gray emulsion having a soft consistency and good shelf life. Particle sizes of the employed asphalt are controlled in order to preserve reflectivity of the finished emulsion.

Abstract: Method and apparatus for production of asphalt coated sheets comprising materials highly prone to distortion under heat, including polyester and similarly deformable materials, in a coating machine comprising a mat puller adapted to pull the mat at a selectable rate, a coater, and a metering device. The metering device is optionally adapted to pull the mat at a selectable rate. The mat is pulled through the coater and coated with asphalt heated to 250° F. to 500° F., while the rates at which the mat puller and metering device pull the mat are independently and/or jointly adjusted to such that coated sheet may be produced at rates of more than 200 feet per minute, without wrinkling or necking in the mat.

Abstract: Fully oxidized cutback asphalts suitable for application in roofing, waterproofing, and sealing applications in all weather conditions, including as mastics and other sealants. Compositions according to the invention comprise unprecedented proportions of solids and asphalts yet remain workable to temperatures as low as 20.degree. F. or below. In addition to fully-oxidized roofing-grade asphalts, preferred compositions according to the invention also comprise hydrophobic agents selected from the group comprising fatty acids and amine compounds and may be applied in rain or other wet conditions, and include polybutene to control the glass transition temperature of the completed mastic and thereby permit application of the composition at extremely low temperatures. Preferred embodiments optionally also comprise fillers such as cellulose fibers, diatomaceous earth, limestone, and asbestos for various advantageous purposes.

Abstract: Product and method for making an asphaltic emulsion enjoying the weather-resistant and durability advantages of a fully-oxidized asphaltic base. Preferred compositions according to the invention comprise a fully-oxidized asphalt having a softening point of between about 110.degree. F. and about 160.degree. F. and a slurry, the slurry comprising water, a colloidal clay (preferably bentonite clay), barium chloride, and citric acid. Optionally sodium dichromate, fillers such as cellulose fibers, and biocidal agents are added as well. The method for making such asphalts comprises oxidation of a flux asphalt in an air still, preparation of the slurry, and combination of the oxidized asphalt and the slurry in a high speed mixing machine such as a colloidal mill.

Abstract: Process and composition for styrene-ethylene-butylene-styrene (SEBS) block copolymer modified asphalt mixtures for use in roofing, sealing, paving, and waterproofing membranes. Powdered and pelletized SEBS is added to oxidized or unoxidized asphalt flux in high-shear processes, and is applied in hot and ambient uses such as cutbacks and emulsions, with or without added fillers, fibers, or other additives.

Abstract: Process and composition for styrene-ethylene-butylene-styrene (SEBS) block copolymer modified asphalt mixtures for use in roofing, sealing, paving, and waterproofing membranes. A plasticized SEBS compound is added to oxidized or unoxidized asphalt flux in either low-shear or high-shear processes, and is applied in hot and ambient uses such as cutbacks and emulsions, with or without added fillers, fibers, or other additives.

Abstract: An evacuated envelope is divided into a plurality of electron propagation channels. Each channel includes an electron gun section and a beam guide section. The electron gun section provides electrons in the form of beams to the guide section. The guide section includes spaced guide meshes and the electrons are propagated along the channel in the space between the guide meshes. A launch section, in the form of at least one pair of launch electrodes, is arranged between the electron gun section and the beam guide section. The conditions under which electrons leave the gun section and enter the guide section are selected by the application of selected voltages to the launch electrodes.