WO2012033490A1 - Modificateurs d'asphalte, procédés de modification de l'asphalte, compositions d'asphalte et leurs procédés de préparation - Google Patents

Modificateurs d'asphalte, procédés de modification de l'asphalte, compositions d'asphalte et leurs procédés de préparation Download PDF

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Publication number
WO2012033490A1
WO2012033490A1 PCT/US2010/048155 US2010048155W WO2012033490A1 WO 2012033490 A1 WO2012033490 A1 WO 2012033490A1 US 2010048155 W US2010048155 W US 2010048155W WO 2012033490 A1 WO2012033490 A1 WO 2012033490A1
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Prior art keywords
asphalt
wax
component comprises
polyolefin
petroleum
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PCT/US2010/048155
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English (en)
Inventor
Premnathan Naidoo
Patrick Keating
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Asphalt & Wax Innovations, Llc
WaxTech Energy Holdings, Inc.
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Publication date
Application filed by Asphalt & Wax Innovations, Llc, WaxTech Energy Holdings, Inc. filed Critical Asphalt & Wax Innovations, Llc
Priority to PCT/US2010/048155 priority Critical patent/WO2012033490A1/fr
Publication of WO2012033490A1 publication Critical patent/WO2012033490A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
    • C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
    • C08L91/06—Waxes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L19/00—Compositions of rubbers not provided for in groups C08L7/00 - C08L17/00
    • C08L19/003—Precrosslinked rubber; Scrap rubber; Used vulcanised rubber
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L21/00—Compositions of unspecified rubbers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2555/00—Characteristics of bituminous mixtures
    • C08L2555/20—Mixtures of bitumen and aggregate defined by their production temperatures, e.g. production of asphalt for road or pavement applications
    • C08L2555/22—Asphalt produced above 140°C, e.g. hot melt asphalt
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2555/00—Characteristics of bituminous mixtures
    • C08L2555/40—Mixtures based upon bitumen or asphalt containing functional additives
    • C08L2555/60—Organic non-macromolecular ingredients, e.g. oil, fat, wax or natural dye
    • C08L2555/70—Organic non-macromolecular ingredients, e.g. oil, fat, wax or natural dye from natural non-renewable resources
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2555/00—Characteristics of bituminous mixtures
    • C08L2555/40—Mixtures based upon bitumen or asphalt containing functional additives
    • C08L2555/80—Macromolecular constituents
    • C08L2555/86—Polymers containing aliphatic hydrocarbons only, e.g. polyethylene, polypropylene or ethylene-propylene-diene copolymers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways

Definitions

  • the present invention relates to asphalt compositions, asphalt modifiers, methods of making and using such compositions and modifiers, methods of modifying asphalt, and asphalt products.
  • Asphalt is a sticky, black and highly viscous liquid or semi-solid that is present in most crude petroleum and in some natural deposits.
  • asphalt or asphalt cement
  • bitumen is the carefully refined residue from the distillation process of selected crude oils. Outside North America, the product is called bitumen.
  • Asphalt binder is a key ingredient in pavements, roofing and waterproofing applications. The primary use of asphalt is in road construction, where it is used as the glue or binder for the aggregate particles, and accounts for approximately 80% of the asphalt consumed in the United States.
  • the most common type of flexible pavement surfacing in the United States is hot mix asphalt (HMA) that may also be known by many different names such as hot mix, asphalt concrete (AC or ACP), asphalt, blacktop or bitumen.
  • HMA hot mix asphalt
  • roofing applications mainly in the form of roofing shingles account for most of the remaining asphalt consumption.
  • Other uses include waterproofing applications.
  • Asphalt binder as produced by the refining process does not have the desired stiffness modulus for heavy load bearing for use in heavily trafficked pavements such as the Interstate Highways as well as heavily trafficked inner city streets.
  • polymers such as Styrene Butadiene Styrene (SBS) Styrene Butadiene Rubber (SBR), Ethylene Vinyl Acetate (EVA), Fischer-Tropsch Waxes, Elvaloy Ter-Polymers, Natural and Synthetic Latex and Crumbed Tire Rubber and also combinations of one or more of these have been used as asphalt binder modifiers.
  • Warm Mix is a reduction in asphalt aggregate mixing, transportation, lay down and paving temperatures by between 30°F to 70°F and providing benefits such as drastically reduced emissions during production, drastically reduced emissions during paving, energy savings, facilitating longer hauls to paving sites, wider paving window such as early paving in Spring and later paving into Fall and superior compaction over Hot Mix.
  • Adequate compaction is one of the prerequisites for a long lasting pavement and is difficult to achieve especially with highly modified stiff binders as well as with gap graded mixes such as Stone Mastic asphalt (SMA) and Open Graded Friction Courses (OGFC).
  • SMA Stone Mastic asphalt
  • OGFC Open Graded Friction Courses
  • Another challenge in achieving adequate compaction is cold climate paving and long haul distances where the mixing plants are located far from the paving sites.
  • Compaction is considered so important by Federal and State authorities that in many cases contractors are awarded bonuses for achieving the target compaction consistently. It is well documented from global field trial and commercial data that Warm Mix applications achieve consistent and on target compaction even in cold weather and with difficult mixes. Also, enhanced compaction through Warm Mix applications a significant development since stiff er binders are being paved to carry the heavier loads and increasing numbers of vehicles on the roads.
  • a major concern of the Warm Mix process is the risk of moisture damage and this is being studied with earnest to assess this risk potential. Firstly, since Warm Mixes are produced at lower temperatures, there remains the risk that the aggregates are not completely dried as with Hot Mix. Secondly, there is the temptation to push Warm Mix to the ultimate limits without any proven data on moisture sensitivity and this may expose potential such risk even further. Thirdly, the use of water as the foaming agent is questionable since it has long been established that if water is left on the surface of the aggregate it will reduce the adhesion of the asphalt binder on to the aggregate causing adhesive failure with time. Also any water present in the binder will reduce the cohesive strength of the asphalt binder over time and cause cohesive failure.
  • a further embodiment of the invention pertains to the use of polyolefin plastomers or elastomers, elastomeric polyethylene- polypropylene, compositions or interpolymers of styrenes olefins, which have been chemically modified so that they react with polyamines to confer to asphalt significantly improved desired chemical and physical properties.
  • U. S. Patent Application Publication No. 20070218250 published September 20, 2007, to Kiik et al., disloses roofing material that consists essentially of a substrate, a hot melt material applied to one side of the substrate, an asphalt material coating the other side of the substrate and roofing granules disposed on said asphalt material coated on the substrate.
  • the hot melt material may be polyethylene, polyethylene- vinyl acetate, polypropylene, polyvinylidene chloride, polyester, nylon and mixtures thereof.
  • the asphalt material may include non-asphaltic filler.
  • U. S. Patent Application Publication No. 20080153945 published June 26, 2008, to Prejean, discloses a polymer-modified asphalt composition comprising an elastomeric polymer blend, a low molecular weight plastomer which may be a polyolefin wax, and an unmodified asphalt.
  • Asphalt compositions of the present invention demonstrate improved elasticity and stiffness compared to conventional polymer-modified asphalt compositions.
  • methods are provided for producing a modified asphalt binder containing crumb rubber or ground tire rubber and a cross-linking agent.
  • the modified asphalt binders comprise neat asphalt, crumb rubber, one or more acids and a cross-linking agent.
  • the modified asphalt binder may include one or more polymer additives, including polyethylene (linear or crosslinked) and polypropylene (attactic or isotactic).
  • the crumb rubber may be obtained from recycled truck and/or automobile tires.
  • the addition of crumb rubber in asphalt binders can improve the consistency and properties of the asphalt binders at high and low temperatures.
  • the modified asphalt binders of the present invention exhibit improved elastic behavior, resulting in improved performance of roads or other surfaces paved using the modified asphalt binder. Road resistance to permanent deformation, fatigue cracking and thermal cracking is improved by use of the modified asphalt binder.
  • U.S. Patent Application Publication No. 20090054562, pubished February 26, 2009, to Martin discloses in a first aspect, bituminous asphalt binder materials which are modified by the addition of crumb rubber or ground tire rubber are described, and discloses in a second aspect, the present invention is directed to methods of producing a modified asphalt binder containing crumb rubber or ground tire rubber.
  • the modified asphalt binders comprise neat asphalt, crumb rubber, one or more synthetic polymers which may include polyethylene, and one or more acids.
  • the crumb rubber may be obtained from recycled truck and/or automobile tires.
  • an asphalt comprising petroleum asphalt a polyolefin component and, a wax
  • a method of treating a petroleum asphalt comprising comprising, contacting a petroleum asphalt with a polyolefin component and a wax component to form a treated asphalt.
  • an asphalt additive comprising polyolefin component, and a wax component.
  • the polyolefin component comprises at least one selected from the group of CI to C36 polyolefin homo-polymers and copolymers, and the wax component comprises a petroleum micro-wax derived from crude oil refining processes; wherein the polyolefin component comprises a melting point range from 115° C to 250° C; wherein the polyolefin component comprises at least one selected from the group of polypropylene homo-polymers and
  • the wax component comprises a petroleum micro-wax derived from crude oil refining processes; wherein the wax component comprises a melting point in the range of 150°F (66°C) to 220°F (104°C); and wherein the wax component is selected from the group consisting of: Polyethylene By-Product Waxes, Fischer-Tropsch Hard Wax, SBS, SB, SEBS, SBR, Natural and Synthetic Latex, Crumber Tire Rubber and Elvaloy Terpolymer, Trinidad Lake Asphalt (TLA), Gilsonite, Montan Waxes and natural Rubber.
  • This invention describes an additive used as an asphalt binder modifier.
  • the additive may be in the form of a one pack additive in pastille, bead, prill or granule form.
  • the additive provides for Pavement and roofing applications that meet the target Performance Grading (PG) in terms of binder stiffness (as measured by the Dynamic Shear Rheometer or Softening Point) and Low Temperature flexibility (as measured by Bending Beam Rheometer or Fraas Breaking point or Mandrel Bending Test).
  • PG Performance Grading
  • this invention may be formulated by specific design to produce the desired binder within the "Warm Mix Asphalt" concept for Paving applications as well as reduced temperature and enhanced application speeds for Roofing applications.
  • the combined effect of the additive package may be to reduce the asphalt aggregate mixing, transportation, lay down and/or compaction temperatures, by between 10°C (50°F) to 32°C (90°F) as a non-limiting example.
  • this invention may provide the benefit of enhancing the useful temperature range of the modified asphalt binder.
  • This additive may be used to modify the asphalt binder first and then add to the aggregate mix or it may be added directly to the aggregate mixing drum whether a continuous drum mixer or a batch mixer. Some embodiments provide ease of transportation, storage and handling.
  • This invention relates to the use of polyolefin homo-polymer or copolymer resins or by-product waxes in asphalt modification.
  • these polyolefin resins may include polypropylene homo-polymer and polypropylene/polyethylene co-polymer resins and by-product waxes in asphalt modification. Since these resins have a substantially higher melting point (above 140°C) than the base asphalt binder (approximately 60°C), the use of such resins has been excluded since the asphalt binder would degrade and become a fume emission hazard at such high temperatures.
  • the technology described herein is novel in producing a compound of the PP Homo-polymer and/or PP plus PE co-polymer such that the melting point is reduced and this compound is uniquely dispersible in asphalt binder at the safe and usual operating temperatures.
  • the additive value in certain embodiments may be realized to "bump" the high temperature PG to the desired level whilst at the same time taking the Low temperature PG value to the desired grade ie. the unique ability to "stretch the PG box” or escalate the useful performance temperature range of the asphalt binder.
  • a second aspect of this novel invention is that the systems described herein meets the requirements of "Warm Mix Asphalt Paving".
  • This invention describes an asphalt/bitumen additive formulation that may be used in combination with modified or unmodified asphalt binder and aggregates to produce an aggregate paving mixture used to pave roads/pavements.
  • the primary rheology modifying component comprises a polyolefin homo-polymer and/or copolymer in any ratio.
  • Some non- limiting embodiments employ PP Homo-polymer resin or PP plus PE co-polymer resin or combinations of these in any ratio.
  • the resins described herein have a melting point range of 266°F (130°C) to 392°F (200° C) and above.
  • Some embodiments may employ a secondary rheology modifying component which may comprise a petroleum micro-wax obtained from conventional crude refining.
  • this wax may have a melting point range between 140°F (60°C) to 239°F (115°C).
  • it may be at times be desired to use a blend of two or more separate micro- waxes in the above melt range to achieve the desired rheology properties.
  • the dispersing effect may also be achieved through the use of an additional component that is either Crude Tall Oil (CTO) or an oxidized Tall Oil Pitch.
  • Non-limiting examples of other secondary rheology modifiers that may be used alone or in any combination may be Low Molecular Weight PE Waxes, Fischer-Tropsch Waxes, Petroleum Paraffin Waxes, Montan Wax, SBs, SBR, Natural and Synthetic Latex, Trinidad Lake Asphalt, Gilsonite and other natural asphalts, Crumbed Tire Rubber, etc.
  • the additive package described above may contributes to the Warm Mix benefits in the following manner:
  • the reduction in viscosity of the asphalt binder may be achieved through the combination of rheology/viscosity modifiers described above, that in turn reduces the viscosity of the aggregate mix making it possible to compact the mix at the lower temperatures in the Warm Mix range.
  • the CTO and or oxidized tall oil pitch acts as a dispersing agent for the polyolefin homo-polymer and co-polymer resins, and may further reduce the viscosity of the additive package thereby contributing to further improvements in compaction and increasing the useful paving window.
  • the combination of polyolefin homo- polymer and co-polymer resins may contributes to the binder stiffness at the pavement performance temperature producing the effect of a performance grading grade bump.
  • the combination of micro-waxes provides the effect of viscosity reduction at the paving temperatures while contributing to the binder and pavement flexibility at Low Temperatures during winter periods. In this way the stiffness of the binder may be offset at Low Temperature Performance.
  • the CTO and oxidized CTO may perform as adhesive agents linking the asphalt binder to the aggregate surfaces.
  • Different combinations of the secondary rheology modification component may be used to achieve the specific desired specification/property such that several grades of the additive may be commercially produced.
  • the additive invention described above can easily be used in any asphalt mixture conventionally paved in the Hot Mix mode to reduce the asphalt mix production, transportation, paving and compaction temperatures.
  • the additive package may be first added to the asphalt binder and the so modified binder may be added to the aggregate mix in a continuous drum mixer or batch mixer. Also, the additive package may be added directly to the aggregate mix in a continuous drum mixer or a batch mixer immediately after the binder comes into contact with the aggregate.
  • the additive package may also be used for surface dressings such as hot applied chip seals, slurry seals and such surface dressings as a viscosity reducer and to eliminate the use of volatile cut back solvents and associated fume emissions.
  • surface dressings such as hot applied chip seals, slurry seals and such surface dressings as a viscosity reducer and to eliminate the use of volatile cut back solvents and associated fume emissions.
  • Warm Mix applications may also include coatings and sealants for moisture protection as well as solvent and chemical resistance mixtures.
  • the asphalt binder may be modified with the described additive package to meet the target specifications (Softening Point, Penetration, Flash Point, Ductility, Tensile Strength etc.) and may then be coated onto the non-woven substrate (usually glass fiber).
  • target specifications Softening Point, Penetration, Flash Point, Ductility, Tensile Strength etc.
  • the additive package described herein may be used to modify the asphalt binder to achieve the desired specifications (Softening Point, Penetration, Flash point, Ductility, Tensile Strength, etc.) and then used for Hot Applied or Emulsion Applied coatings.
  • the additive package may be used to manufacture adhesive coatings for roofing applications.
  • the additive package described herein may be used in asphalt feed stocks prior to blowing to harden the binder through oxidation.
  • the additive package will be present in the at 0.5% up to 10% range by weight, although more than 10% and less then 0.5% are also believed to be beneficial.
  • the benefits of this additive are reduced batch cycle times for example by 20% to 35%, less aging of the blown binder, lower viscosity and workability of the blown binder and easier achievement of target specifications.
  • this technology may enable the blow still to operate on a wider available pool of asphalts including fluxes and paving grades to achieve the same target specifications. In some embodiments in which the blow still can actually be operated at lower blow temperatures, a wider pool of asphalt may become available for blowing.
  • the polyolefin homo-polymer and copolymer utilized herein may be obtained by any suitable method and means, using any suitable catalyst as is well known in the polyolefin art.
  • suitable polyolefin may contain from about 1 to about 36 carbon atoms.
  • PP homo-polymer and PP plus PE co-polymer may be derived from the manufacture of PP resins either as a by-product streams or as intermediate grades during the change over form one grade to the next. These streams may be collected from the process and segregated into several qualities and which may be combined again to yield product that is suitable for specific asphalt applications either as such or in combination with the secondary rheology modifying agent described herein.
  • the resin or by-product wax content of the additive package when manufactured as a compound, may comprise in the range of 5% to 95% and preferably in the range of 50% to 85%.
  • the Melting Point of the resin or by-product wax component is in the range of 120C (248F) to 200C (392F) and preferably in the range of 130C (266F) to 175C (347F).
  • the resin component may comprise a Needle Penetration at 77°F in the range of 0 to 10 (units being 0.1 mm).
  • the resin component or primary rheology portion serves as a one component of the rheology/viscosity modifier and may also contributes to the overall binder stiffness at the pavement performance temperature as measured by the Dynamic Shear Rheometer.
  • any suitable petroleum wax may be utilized in the present invention as desired.
  • the petroleum micro-wax may be derived from crude oil refining processes.
  • One non-limiting example of a suitable petroleum was has a melting point in the range of 150°F (66°C) to 220°F (104°C).
  • a combination of two or more separate micro-wax streams may also be used at times to achieve the desired effect.
  • the micro-wax may serve a dual purpose of viscosity modifier as well as to impart Low Temperature Performance flexibility to the asphalt binder and pavement mix.
  • the content of micro-wax in the additive package can be in the range of from 2, 5, 10, 15, 20, 30, 40, 50 60, 70 80 wt% to 50, 60, 70, 80, 90, 95, and 99 wt%. As non-limiting examples in the range of about 2 to 50 wt%, and in the range of 10 to 20 wt%.
  • a non- limiting example of a suitable crude oil derived micro-wax may have the following properties: Drop Melt Point (ASTM D 127) in the range of 150°F (66°C) to 220°F (104°C); and Kinematic Viscosity (ASTM D445) at 212°F (100°C) in the range 10 to 320 centi- stokes.
  • Any suitable Crude Tall Oil and Oxidized Tall Oil Pitch Component may be utilized in the present invention.
  • the crude tall oil and oxidized tall oil pitch component can be in the range of 2% to 20 % of the formulation and preferably in the range of 2% to 10% of the formulation.
  • the function of the oxidized tall oil pitch is as a dispersant for the resins so that it is evenly distributed in the final asphalt mixture to impart a consistent stiffness modulus to the asphalt binder as well as to the asphalt mix.
  • tall oil materials includes man made and naturally occurring tall oil, tall oil pitch, tall oil blends, and similar tall oil products.
  • Tall oil is a liquid resinous material that may be obtained in the digestion of wood pulp from paper manufacture.
  • Commercial tall oils comprise a complex of fatty acids, resin acids, sterols, higher alcohols, waxes and hydrocarbons. The acid components also may be present as the esters thereof.
  • a common source of tall oil that may be used in the practice of the present invention is from pine trees.
  • tall oil contains fatty acids, esters, rosin acids, sterols, terpenes, carbohydrates and lignin. These may be separated when wood is converted to paper pulp by the sulfide or Kraft process. The acids may then be neutralized in an alkaline digestion liquor. The mixture of rosin and fatty acid soap may be recovered by subsequent acidification that releases free rosin and fatty acids, the major constituents of tall oil.
  • a non-limiting example of a suitable oxidized tall oil pitch may have the following properties: Softening Point in the range of 125°F (52°C) to 220°F (104°C); and Needle Penetration value at 25 °C in the range of 2 to 40 and preferably in the range of 5 to 20.
  • Some embodiments of the additive package of the present invention described herein may provide one or more of the following advantages over other Warm Mix products: [00065] (a) Some non-limiting embodiments may be in the form of a one pack product that can be easily transported globally and handled to be added either to the asphalt binder and then to the aggregate mix as modified binder or it may be added directly to the aggregate mixing drum.
  • the aggregate particles may be evenly coated with binder due to the lower surface tension imparted by the additive package to the binder.
  • the aggregate coated binder is not as sticky as conventionally mixed aggregate and this influences the workability of the aggregate mix and makes to less sticky onto transportation and paving equipment.
  • the compacted pavement may support traffic quickly without having any issues of stickiness onto traffic wheels.
  • the high temperature PG ie. the stiffness modulus
  • the stiffness modulus of the additive modified binder may be improved without or with little degrading of the Low Temperature PG.
  • the additive may be detected and quantified in binder samples or aggregate mix samples or field core samples at any time during the life of the pavement and this is unlike most Warm Mix technologies that merely dissipate and can no longer be detected with passage of time.
  • Some embodiments of the present invention may incorporate one or more other Rheology Modifying Components.
  • Non-limiting examples of such components may be as follows.
  • any known asphalt composition or product may be made using the additives of the present invention to replace part or all of the petroleum based asphalt binder therein.
  • the known equipment and methods of making the known asphalt compositions and products are believed to be sufficient for making the asphalt compositions and products of the present invention in which part or all of the petroleum based asphalt has been partially or wholly replaced by modified asphalt of the present invention.
  • the present invention may also include the following non-limiting embodiments.
  • Non-limiting embodiments of the present invention include a one product additive package formulation for asphalt modification which comprises PP homo-polymer plus PE byproduct wax and/or petroleum micro-wax and/or CTO and/or Oxidized Tall Oil Pitch and/or any of the Other Rheology Modifying Agents above.
  • the additive may increase the useful performance temperature range of the asphalt binder which may already be modified or not.
  • Non-limiting embodiments of the present invention include the additive package described above which may be used as the Warm Mix Asphalt Paving concept.
  • Non-limiting embodiments of the present invention include the additive package described above and which may be used in roofing applications.
  • Non- limiting embodiments of the present invention include the PE Wax described above that is derived as a by product wax from polyethylene manufacture in the Softening Point range of 215°F (102°C) to 275°F ( 135°C), Needle penetration value at 25°C in the range of 2 to 10 and Brookfield Viscosity at 300°F in the range of 15 to 300 cps.
  • Non-limiting embodiments of the present invention include the Petroleum Micro- Wax described in the invention above that is derived from crude oil refining and has a Drop Melt Point (ASTM D127) in the range of 150°F ( 66°C) to 220°F (104°C) and Kinematic Viscosity (ASTM D445) at 212°F (100°C) in the range of 10 to 320 Centi-Stokes.
  • ASTM D127 Drop Melt Point
  • ASTM D445 Kinematic Viscosity
  • Non-limiting embodiments of the present invention include the oxidized tall oil pitch described above with a Softening Point in the range of 125°F (52°C) to 220°F (104°C).
  • Non-limiting embodiments of the present invention include the additive package described above used with neat asphalt binder or with polymer modified binder (including Styrene Butadiene Styrene, Styrene Butadiene Rubber, Natural Latex Rubber, Synthetic Latex Rubber, Crumbed Tire Rubber, Ethylene Vinyl Acetate, Ter-polymers, Atactic Polypropylene).
  • polymer modified binder including Styrene Butadiene Styrene, Styrene Butadiene Rubber, Natural Latex Rubber, Synthetic Latex Rubber, Crumbed Tire Rubber, Ethylene Vinyl Acetate, Ter-polymers, Atactic Polypropylene).
  • Non-limiting embodiments of the present invention include the additive package above used in roofing applications (including shingles, rolls, mop on grades, adhesives and sealants) to reduce working temperatures and enhance workability.
  • Non-limiting embodiments of the present invention include the additive package described above used in hot applied surface dressings including chip seals, slurry seals, joint sealants, crack sealants, etc.
  • Non-limiting embodiments of the present invention include a Warm Mix asphalt mix formulation for the pavement of road surfaces where the formulation comprises of a mixture of bitumen and aggregates and between 0.2 to 30% by weight of the additive package based on weight of the asphalt binder content.
  • Non-limiting embodiments of the present invention include the formulation of above wherein the temperature of compaction of the aggregate mix is 10°F to 90°F below conventional Hot Mix asphalt.
  • Non-limiting embodiments of the present invention include the asphalt formulation above where the additive package may be added to the drum mixer or batch mixer directly or added to the asphalt binder and then introduced into the drum mixer or batch mixer as additive modified binder.
  • Non-limiting embodiments of the present invention include the Warm Mix asphalt of above where the additive package as such or the individual components of the additive package are added to produce the Warm Mix aggregate.
  • Non-limiting embodiments of the present invention include the additive package described above for use in co-extrusion with polymers and wax additives to render these more easily dispersible in asphalt binders.
  • These co-extrusion components may be any of the primary and/or secondary rheology modifying components mentioned above.
  • Non-limiting embodiments of the present invention include the use of the
  • Temperarure Fail C 69.00 82.00 76.00 Phase Angle 64.80 83.80
  • Additive B 80% Resin plus 20% Micro-Wax and Continuous PG grade escalated from PG 68.4-24.2 to PG
  • the Rotational Viscosity of the modified Asphalt blends are less than 50% of the specified maximum viscosity of 3,000 cps at 135C. This substantial lower viscosity will reduce the viscosity of the aggregate mix in a corresponding manner and will result in Warm Mix Asphalt benefits.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Road Paving Structures (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

Compositions et produits asphaltiques comprenant un asphalte de pétrole, une polyoléfine, et une cire.
PCT/US2010/048155 2010-09-08 2010-09-08 Modificateurs d'asphalte, procédés de modification de l'asphalte, compositions d'asphalte et leurs procédés de préparation WO2012033490A1 (fr)

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Cited By (7)

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WO2015119842A1 (fr) 2014-02-07 2015-08-13 Honeywell International Inc. Ciments asphaltiques modifiés par un plastomère conformes aux spécifications mscr, matériaux asphaltiques de pavage les utilisant, et procédés de fabrication desdits ciments asphaltiques
US9598610B2 (en) 2014-05-12 2017-03-21 Tamko Building Products, Inc. Asphalt upgrading without oxidation
US9803085B2 (en) 2008-09-24 2017-10-31 Wright Asphalt Products Company System and method for high throughput preparation of rubber-modified asphalt cement
US10233120B2 (en) 2008-04-30 2019-03-19 Wright Advanced Asphalt Systems System and method for pre-treatment of rubber-modified asphalt cement, and emulsions thereof
CN110093044A (zh) * 2017-05-27 2019-08-06 青岛东方雨虹建筑材料有限公司 一种热熔型弹性体改性沥青防水卷材及其制备方法
WO2020176101A1 (fr) * 2019-02-28 2020-09-03 Lehigh Technologies, Inc. Composition de modificateur d'asphalte et asphalte modifié par du caoutchouc ayant une stabilité de stockage accrue
US11466176B2 (en) 2020-08-14 2022-10-11 Bmic Llc Non-asphaltic coatings, non-asphaltic roofing materials, and methods of making the same

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US6100317A (en) * 1993-03-29 2000-08-08 Polyphalt L.L.C. Stabilized bitumen compositions
US6130276A (en) * 1995-06-07 2000-10-10 Owens Corning Fiberglas Technology, Inc. Method of reducing fumes from a vessel of molten asphalt
US6069194A (en) * 1997-12-12 2000-05-30 Owens Corning Fiberglass Technology, Inc. Packaged asphalt containing fume-reducing additives and method of producing same
US20090000514A1 (en) * 2007-06-28 2009-01-01 Trumbore David C Method of producing roofing shingle coating asphalt from non-coating grade asphalt

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10233120B2 (en) 2008-04-30 2019-03-19 Wright Advanced Asphalt Systems System and method for pre-treatment of rubber-modified asphalt cement, and emulsions thereof
US9803085B2 (en) 2008-09-24 2017-10-31 Wright Asphalt Products Company System and method for high throughput preparation of rubber-modified asphalt cement
US10093804B2 (en) 2008-09-24 2018-10-09 Wright Asphalt Products Company System and method for high throughput preparation of rubber-modified asphalt cement
KR20160119115A (ko) * 2014-02-07 2016-10-12 허니웰 인터내셔날 인코포레이티드 Mscr 규격을 충족하는 플라스토머 개질 아스팔트 바인더, 상기 아스팔트 바인더를 갖는 아스팔트 포장재, 및 상기 아스팔트 바인더의 제조 방법
KR102445604B1 (ko) 2014-02-07 2022-09-20 허니웰 인터내셔날 인코포레이티드 Mscr 규격을 충족하는 플라스토머 개질 아스팔트 바인더, 상기 아스팔트 바인더를 갖는 아스팔트 포장재, 및 상기 아스팔트 바인더의 제조 방법
WO2015119842A1 (fr) 2014-02-07 2015-08-13 Honeywell International Inc. Ciments asphaltiques modifiés par un plastomère conformes aux spécifications mscr, matériaux asphaltiques de pavage les utilisant, et procédés de fabrication desdits ciments asphaltiques
EP3102636A4 (fr) * 2014-02-07 2017-11-08 Honeywell International Inc. Ciments asphaltiques modifiés par un plastomère conformes aux spécifications mscr, matériaux asphaltiques de pavage les utilisant, et procédés de fabrication desdits ciments asphaltiques
US9969649B2 (en) 2014-02-07 2018-05-15 Honeywell International Inc. Plastomer-modified asphalt binders meeting MSCR specifications, asphalt paving materials with such asphalt binders, and methods for fabricating such asphalt binders
US9637664B2 (en) 2014-05-12 2017-05-02 Tamko Building Products, Inc. Asphalt upgrading without oxidation
US9598610B2 (en) 2014-05-12 2017-03-21 Tamko Building Products, Inc. Asphalt upgrading without oxidation
CN110093044A (zh) * 2017-05-27 2019-08-06 青岛东方雨虹建筑材料有限公司 一种热熔型弹性体改性沥青防水卷材及其制备方法
CN110093044B (zh) * 2017-05-27 2021-08-06 青岛东方雨虹建筑材料有限公司 一种热熔型弹性体改性沥青防水卷材及其制备方法
WO2020176101A1 (fr) * 2019-02-28 2020-09-03 Lehigh Technologies, Inc. Composition de modificateur d'asphalte et asphalte modifié par du caoutchouc ayant une stabilité de stockage accrue
US11466176B2 (en) 2020-08-14 2022-10-11 Bmic Llc Non-asphaltic coatings, non-asphaltic roofing materials, and methods of making the same

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