Abstract: Insoluble particulate materials, which may be in solid or liquid form, are dispersed in a continuous non-aqueous phase and the dispersion rendered stable and resistant to phase separation by an in-situ stabilization procedure involving the formation of chemical bonds among the stabilizer components and to dispersed phases to form a network surrounding the particles which is compatible with the continuous phase. The invention has particular application for the formation of stabilized polyolefin-modified bitumen compositions for paving and other applications.

Abstract: An object of the invention is to provide a rubber modified asphalt type of waterproofing composition which can be used in a normal temperature type of spray waterproofing method and can find its application in waterproofing, moisture-proofing, rustproofing, and filling buildings and structure for engineering works, said waterproofing composition coagulates instantaneously to form a stable yet firm waterproofing layer. This rubber modified asphalt type of waterproofing composition comprises a cationic rubber modified asphalt emulsion and an organic coagulating agent.

Abstract: An HIPR emulsion of bitumen in water is prepared by a method which comprises directly mixing 70 to 98% by volume of bitumen having a viscosity in the range 200 to 500,000 mPa.s at the mixing temperature with 30 to 2% by volume of an aqueous solution of an emulsifying surfactant, percentages being expressed as percentages by volume of the total mixture. Mixing is effected under low shear conditions in the range 10 to 1,000 reciprocal seconds in such manner that an emulsion is formed comprising highly distorted bitumen droplets having mean droplet diameters in the range 2 to 50 micron separated by thin films of water.The emulsions can be cut back to provide stable emulsions of lower bitumen content which are useful in road-making and the formation of protective coatings.

Abstract: This invention relates to rapid set, medium set, and slow set anionic emulsions prepared from straight bitumen or bitumen modified by the incorporation of polymers such as styrene butadiene rubbers (SBR), styrene block copolymers (SBS), ethylene vinyl acetate copolymers (EVA), and other suitable modifiers. The invention also relates to emulsions modified by the incorporation of solvents (such as diesel oil or kerosene) or by the addition of polymer latices (such as SBR-latex or natural rubber latex). More particularly, the invention relates to improved methods for enhancing adhesion between asphalt and aggregate in anionic solventless and solvent-containing bituminous emulsions wherein the emulsifiers are alkali earth salts of tall oil fatty acids, fortified tall oil fatty acids, tall oil rosin and fortified rosin as well as combinations of kraft lignin and nonionic emulsifiers.

Abstract: This invention relates to rapid set, medium set, and slow set anionic emulsions prepared from straight bitumen or bitumen modified by the incorporation of polymers such as styrene butadiene rubbers (SBR), styrene block copolymers (SBS), ethylene vinyl acetate copolymers (EVA), and other suitable modifiers. The invention also relates to emulsions modified by the incorporation of solvents (such as diesel oil or kerosene) or by the addition of polymer latices (such as SBR-latex or natural rubber latex). More particularly, the invention relates to improved methods for enhancing adhesion between asphalt and aggregate in anionic solventless and solvent-containing bituminous emulsions wherein the emulsifiers are alkali earth salts of tall oil fatty acids, fortified tall oil fatty acids, tall oil rosin and fortified rosin as well as combinations of kraft lignin and nonionic emulsifiers.

Abstract: Disclosed are oil-in-water asphalt emulsions comprising asphalt dispersed as the discontinuous phase in an aqueous continuous phase, the emulsions containing one or more anionic emulsifiers selected from the group consisting of compounds of the formulas (Ia), (Ib), (II), and (III)(R.sup.1 CH(OH)--(CH.sub.2).sub.m SO.sub.3).sub.1 X (Ia)(R.sup.1 CH.dbd.CH(CH.sub.2).sub.m-1 SO.sub.3).sub.1 X (Ib)(R.sup.2 O--(AlkO).sub.c CH.sub.2 COO).sub.1 X (II)((R.sup.3).sub.x --(A)--SO.sub.3).sub.1 X (III)wherein R.sup.1, R.sup.2, and R.sup.3 are C.sub.6-40 hydrocarbyl, m is 1-10, X is --H or a cation, c is 1-20, A is phenyl or polycyclic aromatic, k is 1-3, and i is the valence of X.

Abstract: Disclosed are filled oil-in-water asphalt emulsions which remain homogeneous for prolonged periods of time notwithstanding the presence of particulate filler that might be expected to break the emulsions. The emulsions contain asphalt dispersed as the discontinuous phase in an aqueous continuous phase, particulate filler, and one or more amphoteric emulsifiers selected from the group consisting of compounds of the formulas (a) and (b)R.sup.4 --(OC.sub.3 H.sub.6).sub.0-1 --(C(O)NH(CH.sub.2).sub.1-3).sub.0-1 --N(Z.sup.1) (Z.sup.2).sub.0-1 --ZCOOX (a)R.sup.4 --(OC.sub.3 H.sub.6).sub.0-1 (C(O)NH(CH.sub.2).sub.1-3).sub.0-1 --N(Z.sup.1) (Z.sup.2).sub.0-1 --ZSO.sub.3 XH (b)wherein R.sup.4 is C.sub.4-24 alkyl or alkylene, f is 1-6, is --H or a cation, Z is (CH.sub.2).sub.f, CH.sub.2 CHOHCH.sub.2, or CH.sub.2 CH.sub.2 OCH.sub.2 CH.sub.2, and Z.sup.1 and Z.sup.2 are C.sub.f H.sub.2f+1 or C.sub.f H.sub.2f OH, or in (a) Z.sup.1 can be --ZCOOX.

Abstract: Bitumen compositions comprising bitumen and at least one succinic anhydride derivative contained in the bitumen, processes for their preparation and their use in bitumen emulsions for road applications, e.g. surface dressings.

Abstract: Fire retardant plastic construction materials containing a fire retarding quantity of the oxidation product of certain asphalts.

Abstract: An asphaltic roadway base or sub base which includes a by-product of petroleum refining units utilizing a Residuum Oil Supercritical Extraction (ROSE) process. The base course is a designed mixture of a resin-asphaltene residuum and aggregate, wherein the resin-asphaltene residuum has a penetration less than 10 at 77.degree. F. and a softening point above 150.degree. F., the resin-asphaltene residuum is present in the range of 3% to 12%, by weight of the composition, and the aggregate is present in the range of 88% to 97%, by weight of the composition.

Abstract: Emulsifier compositions comprising a mixture of a Natural Vegetable Polyphenolic Extract (NVPE) selected from Quebracho (preferred), Chestnut A, Chestnut N and Sumac-K10, surfactant, water, and a pH adjusting reagent for dry and aqueous anionic emulsifiers for producing universal bitumen-in-water emulsions. These NVPE emulsifiers are particularly useful in producing stable, anionic asphalt-in-water emulsions that are universal, i.e., they can be used as is or with a wide variety of fillers, additives, pigments and the like, including fine particulate materials, without premature breaking. In the preferred emulsifier, crude, spray-dried Quebracho is mixed with an alpha olefin sulfonate containing 10 to 20 carbon atoms, and the pH is preferably adjusted to pH 10 producing an anionic emulsifying agent. The pH may be adjusted from pH 4.5 to pH 11.5. Asphaltic emulsions made with the NVPE Quebracho emulsifier exhibit enhanced stability, increased viscosity, high ionic headroom and decreased drying times.

Abstract: This procedure includes detecting and rejecting the used mineral motor oils containing polychlorinated biphenyls (PCB's) and/or polychlorinated triphenyls (PCT's) before filtering; before the decantation and/or distillation step, if necessary, submitting the used mineral motor oil to thermal shock treatment. In the recycling process, stabilizing the used mineral motor oils that normally contain heavy metals by adding to bitumen, using 0 to 15 percent of used mineral motor oil and a minimum of 85 percent bitumen for bituminous pavements and 1 to 20 percent of used mineral motor oils and a minimum of 80 percent bitumen for bitumen emulsions and paints. Also in the recycling process the used mineral motor oils are mixed with bitumen and paraffinic elastomers, stabilizing the heavy metals contained in the used mineral motor oils, getting usual bituminous pavements, self-draining bituminous pavements, sport pavements, etc. EPM EPDM or butyl rubber are used as paraffinic elastomers.

Abstract: The present invention provides a method of making storage-stable road paving binders by blending a minor amount of an unsaturated polymer (e.g., having at least one diene monomer) with a major amount of asphalt at an elevated temperature such that the components are sufficiently fluid to blend; treating the asphalt-polymer blend with a sulfonating agent; and stripping the treated asphalt-polymer blend at an elevated temperature with sufficient stripping gas to remove strippable sulfur moieties and to stabilize the resulting stripped, treated blend. The invention also provides asphaltic compositions made by the method. The asphaltic compositions are useful as binders in road paving applications.

Abstract: The invention relates to a reinforcing material suitable for repairing cavities in the ground surrounding an underdrain through which sewers are laid down, and provides a bituminous reinforcing material for grouting excellent in workability and durability. The two-liquid bituminous reinforcing material comprises a liquid A that is obtained by mixing together an asphalt emulsion, a hydraulic inorganic material, a reactive type of water-soluble resin, and water, and a liquid B that is obtained by mixing together an asphalt emulsion, a hydraulic inorganic material, a polymerization catalyst, and water.

Abstract: This invention relates to the manufacture and application of uniquely suitable emulsifiers for anionic bituminous emulsions. In particular, this invention relates to emulsifiers for slow-setting aqueous emulsions suitable for use in applications where a high degree of chemical, mechanical, and rheological stability is required (such as in slurry seal applications and thixotropic industrial emulsion applications). In such applications, fine aggregate, clay, or polymer latex is mixed with the emulsion to obtain a homogenous storage-stable composite which can be applied for coatings, floorings, roofings, and as a roadway sealant.

Abstract: The addition of from about 0.1 to about 1 parts by weight of a natural polyphenolic-containing vegetable extract (NPVE) per 100 parts of bitumens (particularly asphalt), coal tar, or other high boiling tars containing mixtures of aliphatic and aromatic hydrocarbons modifies the characteristics of the treated product to enhance its performance as hot-melt adhesives, coatings, sealants, roof-coatings, and road-coatings as compared to the base bitumen. The NPVEs are naturally occurring, are extracted from plants and include quebracho, chestnut, wattle and sumac. By forming the ammonia salt of NPVE (ammonium/NPVE) and adding it to a base or NPVE-modified bitumen, the characteristics of increased adhesion and resistance to stripping is observed. Surprisingly, the addition of commercially available anti-stripping agents to an ammonium/NPVE-modified bitumen results in a modified-bitumen having a stripping resistance greater than either of the additives alone.

Abstract: Disclosed are oil-in-water asphalt emulsions comprising asphalt dispersed as the discontinuous phase in an aqueous continuous phase, the emulsions containing one or more amphoteric emulsifiers selected from the group consisting of compounds of the formulas (a) and (b)R.sup.4 --(OC.sub.3 H.sub.6).sub.o-1 --(C(O)NH(CH.sub.2).sub.1-3).sub.0-1 --N(Z.sup.1) (Z.sup.2).sub.0-1 --ZCOOX (a)R.sup.4 --(OC.sub.3 H.sub.6).sub.o-1 (C(O)NH(CH.sub.2).sub.1-3 --N(Z.sup.1)(Z.sup.2).sub.0-1 --ZSO.sub.3 XH (b)wherein R.sup.4 is C.sub.4-24 alkyl or alkylene, f is 1-6, is --H or a cation, Z is (CH.sub.2).sub.f, CH.sub.2 CHOHCH.sub.2, or CH.sub.2 CH.sub.2 OCH.sub.2 CH.sub.2, and Z.sup.1 and Z.sup.2 are C.sub.f H.sub.2f+1 or C.sub.f H.sub.2f OH, or in (a) Z.sup.1 can be --ZCOOX.

Abstract: A pavement rejuvenating and/or conditioning composition in the form of an aqueous-based emulsion or jelly. More particularly, bituminous pavement rejuvenators and pavement dressing conditioners are made into emulsions or jellies by agitating the rejuvenators and/or conditioners in cationically- nonionic or anionically-modified aqueous solvents. These solvents include aqueous polyvinylalcohol; polyoxyalkylenes aqueous amines; aqueous compounded amines such as those available from Akzo Chemicals and sold under the tradename Redicote (i.e., Redicote E-9) or those available from B. F. Goodrich Chemical Co. and sold under the tradename Carbopol; and aqueous solutions of aliphatic fatty acids and caustic (usually sodium hydroxide).

Abstract: A bitumen emulsion of the cationic type is disclosed which contains a thickener comprising at least one substance selected from the group consisting of associative thickeners of the nonionic type. The invention also relates to the use of a thickener of the above mentioned type as a thickener in a bitumen emulsion of the cationic type and the use of a bitumen emulsion containing a thickener as set forth above in road building, roofing and waterproofing.

Abstract: A method of modifying a cationic bitumen emulsion by initiating coalescence by either (i) adding a specific chemical agent or (ii) physical reaction. The method included modifying the bitumen emulsion by combining a second emulsion with a primary emulsion having an aqueous phase to create a bimodal distribution.

Abstract: The present invention provides a method of sealing and priming a prepared substrate, such as a base or sub-base for a roadway, comprising the application of an amount of an emulsion consisting essentially of a first phase of a combination of resinous petroleum oil and an asphalt, a second phase of water, and suitable emulsifiers and stabilizers, where the ratios of the first asphalt and resinous oil phase to the second water phase in the total emulsion are from about a 1:1.8 to 1:11 ratio. The first phase comprises from about 0.3% to 21% asphalt (or equivalent compositions) and from about 3.3% to about 34% resinous petroleum oil (or oils with equivalent properties) based on the total weight of the emulsion. The second phase is of water which provides from about 62.5% to about 91.5% of the total weight of the emulsion. The emulsifiers and stabilizers are from about less than 0.16% to about 2.5% of the total weight of the emulsion. The emulsion may also include about 0.

Abstract: A method of modifying a cationic bitumen emulsion by initiating coalescence by either (i) adding a specific chemical agent or (ii) physical reaction. The method includes modifying the bitumen emulsion by combining a second emulsion with a primary emulsion having an aqueous phase to create a bimodal distribution.

Abstract: The present invention relates to mixing-grade, quick-setting, and slow-setting cationic aqueous bituminous emulsion-aggregate paving slurry seal mixtures. More particularly, this invention relates to paving slurry seal mixtures formed with cationic emulsions prepared by emulsifying bitumen (e.g. asphalt) in water with a cation-active emulsifier. The emulsifier is the product of the reaction of polyamines with certain fatty acids and rosins, and a quaternizing agent such as 2,3-epoxy-propyl-trimethyl ammonium chloride or 3-chloro-2-hydroxy propyl-trimethyl ammonium chloride.

Abstract: Asphaltic concrete compounds comprised of asphalt cement and aggregate have, as a substantial portion of their respective aggregates, anthracite coal particles and fines, which are added specially as a lossy microwave material. These asphaltic concrete compounds are particularly useful when laid clown as a pavement, or a top layer of a pavement, which thereafter can be freed of ice, by using microwave energy to debond the ice. The debonding of the ice occurs without causing any noticeable melting of the ice, and the debonded ice is thereafter easily lifted and removed from the pavement of the way, serving as a roadway, highway, runway, or walkway. Also these asphaltic concrete compounds are particularly useful as patching materials when damaged pavement is being repaired, especially during cold weather.

Abstract: A chemical emulsifier useful to produce a cationic asphalt emulsion of different breaking characteristics, to be applied in road construction and maintenance, the emulsifier comprising a compound obtained by the reaction between a natural wood resin, colophony resin and an amine, whereby, as a result of said reaction, water is liberated as a by-product and primary, secondary and tertiary amino groups are incorporated as substituents to the resin molecules.

Abstract: An organoclay in which a quaternary long chain fatty amine is ionically bonded to clay platelets is found to function both as a filler or thickener as well as a compatibilizer in an asphaltic polyurethane (PUR) dispersion. When a PUR prepolymer is mixed into a homogenized blend of asphalt and organoclay under high shear, a phase inversion occurs the result of which is that a microdispersion of asphalt particles (preferably 1 .mu.m-44 .mu.m) becomes the dispersed phase which is uniformly scattered throughout the PUR prepolymer (the continuous phase). This dispersion is found to be an excellent adhesive, particularly for roofing components which can be secured without using conventional fasteners, and it is stable and moisture-curable to afford, when cured, an elastomer having excellent adhesion to surfaces exposed outdoors. It is also user-friendly because it is solvent-free. The asphalt is treated to react all functional groups it may have because they may react with a functional group of the PUR prepolymer.

Abstract: Emulsifier compositions comprising a mixture of quebracho, a surfactant, water, and a pH adjusting reagent for dry and aqueous anionic emulsifiers for producing universal bitumen-in-water emulsions. These emulsifiers are particularly useful in producing stable, anionic asphalt-in-water emulsions that are universal, i.e., they can be used as is or with a wide variety of fillers, additives, pigments and the like, including fine particulate materials, without premature breaking. In the preferred emulsifier, crude, spray-dried quebracho is mixed with an alpha olefin sulfonate containing 10 to 20 carbon atoms, and the pH is preferably adjusted to pH 10 producing an anionic emulsifying agent. The pH may be adjusted from pH 4.5 to pH 11.5. Asphaltic emulsions made with the quebracho emulsifier exhibit enhanced stability, increased viscosity, high ionic headroom and decreased drying times.

Abstract: A method for preparing a bitumen emulsion which comprises forming the emulsion from bitumen, water, emulsifying agent, inorganic acid and metal salt, said metal being selected from lithium, sodium, potassium, magnesium, calcium and aluminum wherein the bitumen emulsion has a viscosity of at least 200 cst at 25.degree. C., by the steps of: (a) feeding the bitumen into a first static mixer at a temperature above 50.degree. C.

Abstract: A method of producing a cold mix asphalt paving composition by:(a) separating non-asphalt impurities from an asphalt rubble obtained from a reclaimed asphalt pavement to produce a purified asphalt rubble;(b) comminuting said purified asphalt rubble to obtain sized asphalt-aggregate mixture;(c) testing said sized asphalt-aggregate mixture to determine the percent of asphalt present in said asphalt-aggregate mixture; and(d) blending an asphalt emulsion with said asphalt-aggregate mixture in an amount so as to yield a cold mix asphalt pavement composition comprising from about 4.0% to about 6.5% by weight of asphalt.The cold mix asphalt paving composition is used to coat roadway surfaces, parking lots, driveways, and the like. Once the cold mix asphalt paving composition has been applied to a surface, a top coat may be overcoated onto the cold mix asphalt pavement.

Abstract: This invention relates to water-based coatings for exterior surfaces which upon application quickly develop resistance to being washed out by inadvertent precipitation. These compositions comprise an aqueous anionically stabilized dispersion of water-insoluble polymer prepared by either emulsion polymerization or mechanical emulsification, inorganic pigment dispersed with anionic polymers, salts, or soaps, and the propionic acid salt of calcium.

Abstract: A composition for the fixation of hydrocarbons from contaminated oily soil and hazardous wastes. The hazardous waste and contamined oily soil are components in a cold mix asphaltic concrete. The soil and hazardous materials are mixed with asphaltic roof cuttings and mineral aggregate to form the mixture. The mixture is coated with a cold mix emulsion to form an asphaltic concrete. The hydrocarbons and hazardous wastes do not leach from the set concrete.

Abstract: A composition useful in copying and printing is described. In one embodiment, the composition comprises a purified fraction of uintaite and a thermoplastic polymer. Preferably, the composition comprises a maltene-enriched fraction of uintaite derived by solvent extraction, a thermoplastic polymer and a colorant. In another embodiment, the present invention is an electrophotographic method comprising the steps of generating a latent electrostatic image; developing said latent image with a toner comprising a purified fraction of uintaite; and fixing said toner. The present invention is also a printing ink emulsion comprising a maltene-enriched fraction of uintaite.

Abstract: Emulsions of asphaltic materials, such as asphalt or asphalt blends with polymers, in water using copolymeric anionic emulsifiers are disclosed. The copolymeric anionic emulsifiers use ionizable carboxyl groups as their hydrophilic moiety. The emulsions using these copolymeric emulsifiers are stable, allowing them to be used anywhere where asphalt or modified asphalt is used as a sealant, coating, or binder. These emulsions can also be mixed with polymer latices, pigments, fibers, fillers and other additives to impart particular properties specific to the type of application, i.e., pigmented flexible coating compositions, non-sag sealer and sealant compositions, water borne adhesive compositions, etc., for use in construction and industrial fields. These asphalt emulsions have better freeze-thaw stability, higher solids contents, and wider applicability to polymer modified asphalt compositions than prior art emulsions.

Abstract: This invention is directed to an improved clays-stabilized bituminous emulsion composition for use as a surface coating and the like. Such an emulsion includes about 90.0-99.95 parts by weight of an aqueous bituminous emulsion and about 0.05-10.0 parts by weight of a cohesion promoting additive selected from the group consisting of amines, amidoamines and blends thereof having the structural formulaX.[R(NH R").sub.n NH.sub.2 ]+Y.[R'"C(O) (NH.sub.m R.sup.IV).sub.o ]whereinX and Y are weight percentages such that X+Y=100% of the active, nitrogenous components,R is a lipophile selected from the group consisting ofR'-andR'OR"-,R' is an alkyl chain having 3-26 carbon atoms,R" is a hydrocarbon fragment 2-6 carbon atoms,n is an integer from 0-4,R'" is selected from the group consisting of an alkyl chain having 3-26 carbon atoms, and an alkenyl chain having 3-44 carbon atoms, andR.sup.

Abstract: A cut-back composition useful for ambient temperature application to substrates comprising a resinous or residue-based component such as asphalt, polymer modified asphalt, coal tar, natural rubber or elastomers and a terpene solvent.

Abstract: A rapid set microsurfacing system which comprises 36% water, 2% of the quaternized or unquaternized emulsifier, 1.5% acid (HCl), 56.5% asphalt residue, and 4% latex polymer [1.5% water and 2.5% rubber]. The quaternized or unquaternized emulsifier comprising an amidoamine and imidazoline mixture prepared from the combination of a tall oil fatty acid rosin mixture with a rosin content between 8 to 40 percent and a polyamine of either ethylenediamine, diethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylene pentamine, or aminoethylethanolamine. The break control agent used can be a hydrophilic, alkylated vinylpyrrolidone polymer (commercially available as Ganex.RTM.

Abstract: Contaminated oily soil is used as a component in a cold mix asphaltic concrete. The soil is mixed with asphalt roof cuttings containing fibers and mineral aggregate to form a mixture. This mixture is coated with a cold mix emulsion to form an asphaltic concrete. The hydrocarbons do not leach from the set concrete.

Abstract: Improved cold-applied asphalt compositions for use as sealants, cements, coatings and the like, including recycled asphalt roofing wastes, and asphalt. Recycled roofing wastes provide an excellent, although unexpected, source of temperature-stable asphalt, stabilizing filler, and reinforcing fiber, which provides compositions having exceptional performance characteristics as well as the reduction or elimination of asbestos from such compositions. Use of asphalt roofing wastes allows for recycling of a non-renewable resource and provides an environmentally-safe alternative to landfill disposal of such materials.

Abstract: A method for the preparation of asphalt concrete from organic contaminated soils such as petroleum contaminated soils in batch mix processing, with reduced levels of pollution emissions. The resultant asphalt concrete is also either strengthened or the asphalt content can be reduced without loss of strength. The contaminated soil is added to superheated aggregate (380.degree.-450.degree. F.) in a closed mixer, in amounts ranging from 5-25% by weight of total aggregate, and the combination is mixed to uniformity, prior to addition of the asphalt cement binder. A conveying system for the cold wet contaminated soil is also described.

Abstract: High float asphalt emulsions with high demulsibilities are prepared from asphalts ill-suited for prior art emulsifiers by mixing a combination of fatty acid and the reaction products of fatty acid with acrylic acid, methacrylic acid, fumaric acid, or maleic anhydride in the form of their alkali salts in the soap solution, and adding to the heated asphalt, prior to the emulsification step, reaction products of fatty acids with mono-, di-, and triethanol amine.

Abstract: Cationic aqueous bituminous emulsion-aggregate slurries are disclosed to be formed with cationic emulsions prepared at elevated temperatures by emulsifying bitumen, such as an asphalt, in water with a cation-active emulsifier which is the blend of the reaction of a polyamine or of a modified polyamine with certain polycarboxylic acids and glycol esters. The emulsifiers are obtained by reacting suitable polyalkylene amines with lignin and maleinized lignin or their blends with tall oil fatty acids and the reaction product of C.sub.8 -C.sub.15 alkylphenol with 30 to 100 moles of ethylene oxide.

Abstract: A moisture-curable, substantially solvent-free and anhydrous blend of a bituminous material such as asphalt and a liquid prepolymer is disclosed, which blend when cured, results in an elastomer having excellent adhesion to surfaces exposed outdoors. The stability of the blend derives from asphalt being microdispersed in a dispersed phase within a continuous phase of the liquid prepolymer so that particles of asphalt are in the size range from 0.5 .mu.m to 100 .mu.m. The asphalt is treated to react all functional groups it may have because they may react with a functional group of the liquid prepolymer. The prepolymer is a polyurethane, a terpolymer of ethylene-propylene-diene, or a silicone. The microdispersion is stably maintained by a compatibilizer having opposed substantially polar and non-polar terminal portions, present in an amount in the range from 0.01 to 5 parts per 100 parts of the blend. The compatibilizer is chosen from (A) an ester of a C.sub.2 -C.sub.

Abstract: A stable emulsion of gilsonite, lignosulphonates and acrylic polymers in water.

Abstract: This invention provides cationic emulsions of bituminous binders of the bitumen/polymer type, formed by a dispersion of an organic phase of the binder in an aqueous phase containing a cationic nitrogenous emulsifier and a mineral or organic acid, the acid being in appropriate quantity so that the pH of the aqueous phase is comprised between 3 and 9. The aqueous phase also contains an agent consisting of at least one water-soluble sequestering salt of polyfunctional nitrogenized carboxylic acid, particularly a salt of alkaline metal or of amine of mono- and di (hydroxy-2 ethyl) glycine and optionally a water-soluble thickening agent. To obtain the emulsions, which are usable for road applications, the emulsifying agent, the sequestering agent and optionally the thickening agent may be used in the form of a premixture containing the agents and called cationic emulsifying system.

Abstract: A bitumen emulsion of anionic or cationic type having a breaking additive is disclosed. The breaking additive comprises a water-in-oil emulsion wherein an aqueous solution of a substance which has a neutralizing effect upon the bitumen emulsion when added thereto is dispersed in an oil continuous phase.The bitumen emulsion is prepared bya) preparing an aqueous solution of a neutralizing substance,b) emulsifying the aqueous solution of a) in oil to form an invert emulsion, andc) mixing the invert emulsion of b) into a bitumen emulsion of anionic or cationic type.The bitumen emulsion can be used as a binder in road building or road maintenance or in construction work.

Abstract: A rapid set microsurfacing system which comprises 36% water, 2% of the quaternized or unquaternized emulsifier, 1.5% acid (HCl), 56.5% asphalt residue, and 4% latex polymer [1.5% water and 2.5% rubber]. The quaternized or unquaternized emulsifier comprising an amidoamine and imidazoline mixture prepared from the combination of a tall oil fatty acid rosin mixture with a rosin content between 8 to 40 percent and a polyamine of either ethylenediamine, diethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylene pentamine, or aminoethylethanolamine. The break control agent used can be a hydrophilic, alkylated vinylpyrrolidone polymer (commercially available as Ganex.RTM.

Abstract: A composition for the fixation of hydrocarbons from contaminated oily soil. The contaminated oily soil is a component in a cold mix asphaltic concrete. The soil is mixed with asphaltic roof cuttings and mineral aggregates to form the mixture. The mixture is coated with a cold mix emulsion to form an asphaltic concrete. The hydrocarbons do not leach from the set concrete.

Abstract: An improved clay-stabilized bituminous emulsion surface-coating composition and method of preparation therefore, including an aqueous bituminous emulsion and a surfactant selected from the group consisting of neutral polyamines, partially and fully acid-neutralized polyamine salts, and mixtures thereof having the structural formula[R(NH.sub.2 R").sub.n NH.sub.n,].sup.+Yz Y(X.sup.-z)wherein R is a lipophile selected from the group consisting of ##STR1## R' is an alkyl chain having 3-26 carbon atoms, R" is a hydrocarbon fragment having from 2-6 carbon atoms, n is an integer from 0-4, n' is an integer from 2-3, z is an integer from 0-5 corresponding to the degree of surfactant neutralization and positive charge, X is an anion selected from the group consisting of fully- or partially-unprotonated mono- or polyacids, and Y is an integer from 0-5 corresponding to the number of anions having a negative z charge.

Abstract: The present invention provides: a cement/asphalt mixture comprising an aggregate, an asphalt emulsion, cement, a hydraulic inorganic material and water, characterized in that the surfaces of aggregate fragments are covered with the asphalt particles prepared by the coalescence of asphalt emulsion and that the hydraulic inorganic material and water are present in the interstices between the aggregate fragments; a process for preparing a cement/asphalt mixture, the process being characterized by the steps of adding 2 to 12 parts (in terms of solids content) of a cationic or anionic asphalt emulsion to 100 parts of an aggregate; mixing them; and mixing the resulting mixture with 1 to 20 parts of a hydraulic inorganic material; and a process for preparing a cement/asphalt mixture, the process being characterized by the steps of adding 2 to 12 parts (in terms of solids content) of a cationic or anionic asphalt emulsion to a mixture of 100 parts of an aggregate and 0.

Abstract: A liquid modifier for topical application to in-situ aged asphalt pavement, said modifier being an emulsion and consisting essentially of the following components:a. a predominantly asphaltene asphalt;b. a predominantly maltene recycling agent;c. a rubbery polymer or latex selected from the group consisting of styrene-butadiene-styrene, styrene butadiene rubber, neoprene latex, and natural rubber, and combinations of one or more of them;d. an emulsifiere. watersaid emulsion being a flowable liquid so as readily to be poured onto a surface and brushed or wiped onto and into it, and readily to flow into and penetrate small cracks in the pavement, and when the water has evaporated, to form a structural bridge and bond between opposed faces of the cracks, and also to pentrate into the original asphalt pavement through said faces to improve its properties.