CN106221108B - A kind of asphalt mixed material modifier particle and preparation method thereof - Google Patents
A kind of asphalt mixed material modifier particle and preparation method thereof Download PDFInfo
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- CN106221108B CN106221108B CN201610592014.6A CN201610592014A CN106221108B CN 106221108 B CN106221108 B CN 106221108B CN 201610592014 A CN201610592014 A CN 201610592014A CN 106221108 B CN106221108 B CN 106221108B
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- 239000000463 material Substances 0.000 title claims abstract description 40
- 239000010426 asphalt Substances 0.000 title claims abstract description 26
- 239000003607 modifier Substances 0.000 title claims abstract description 21
- 239000002245 particle Substances 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 87
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 53
- 239000000203 mixture Substances 0.000 claims abstract description 41
- 238000000034 method Methods 0.000 claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 238000001125 extrusion Methods 0.000 claims abstract description 12
- 238000012545 processing Methods 0.000 claims abstract description 10
- 238000005453 pelletization Methods 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 238000004132 cross linking Methods 0.000 claims description 22
- 238000001816 cooling Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 239000011384 asphalt concrete Substances 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 230000032683 aging Effects 0.000 abstract description 3
- 239000006185 dispersion Substances 0.000 abstract description 3
- 239000004575 stone Substances 0.000 abstract description 3
- 238000010008 shearing Methods 0.000 abstract 1
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 description 73
- 238000004073 vulcanization Methods 0.000 description 15
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- FACXGONDLDSNOE-UHFFFAOYSA-N buta-1,3-diene;styrene Chemical class C=CC=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 FACXGONDLDSNOE-UHFFFAOYSA-N 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 239000005864 Sulphur Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005469 granulation Methods 0.000 description 4
- 230000003179 granulation Effects 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 229910044991 metal oxide Inorganic materials 0.000 description 4
- 150000004706 metal oxides Chemical class 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- FZWLAAWBMGSTSO-UHFFFAOYSA-N Thiazole Chemical compound C1=CSC=N1 FZWLAAWBMGSTSO-UHFFFAOYSA-N 0.000 description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 3
- 239000000292 calcium oxide Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000004567 concrete Substances 0.000 description 3
- 239000000395 magnesium oxide Substances 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 150000002832 nitroso derivatives Chemical class 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- XKJCHHZQLQNZHY-UHFFFAOYSA-N phthalimide Chemical compound C1=CC=C2C(=O)NC(=O)C2=C1 XKJCHHZQLQNZHY-UHFFFAOYSA-N 0.000 description 3
- 230000035484 reaction time Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- QAZLUNIWYYOJPC-UHFFFAOYSA-M sulfenamide Chemical compound [Cl-].COC1=C(C)C=[N+]2C3=NC4=CC=C(OC)C=C4N3SCC2=C1C QAZLUNIWYYOJPC-UHFFFAOYSA-M 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- DKVNPHBNOWQYFE-UHFFFAOYSA-N carbamodithioic acid Chemical compound NC(S)=S DKVNPHBNOWQYFE-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 239000012990 dithiocarbamate Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 229920002725 thermoplastic elastomer Polymers 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000010539 anionic addition polymerization reaction Methods 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 150000003558 thiocarbamic acid derivatives Chemical class 0.000 description 1
- 239000012991 xanthate Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/32—Compounds containing nitrogen bound to oxygen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/06—Sulfur
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/37—Thiols
- C08K5/372—Sulfides, e.g. R-(S)x-R'
- C08K5/3725—Sulfides, e.g. R-(S)x-R' containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/39—Thiocarbamic acids; Derivatives thereof, e.g. dithiocarbamates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/39—Thiocarbamic acids; Derivatives thereof, e.g. dithiocarbamates
- C08K5/40—Thiurams, i.e. compounds containing groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/43—Compounds containing sulfur bound to nitrogen
- C08K5/44—Sulfenamides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/45—Heterocyclic compounds having sulfur in the ring
- C08K5/46—Heterocyclic compounds having sulfur in the ring with oxygen or nitrogen in the ring
- C08K5/47—Thiazoles
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Working-Up Tar And Pitch (AREA)
Abstract
The invention discloses a kind of asphalt mixed material modifier particles and preparation method thereof, including：Raw material SBS and antiscorching agent are uniformly mixed at normal temperatures, the first mixture is made；Then heating melt process is carried out；In the later stage of heating melt process, crosslinking agent and accelerating agent is added, the second mixture is made；Then extrusion process is carried out, strip-shaped materials are obtained；Pelletizing processing is carried out to get to the asphalt mixed material modifier particle to the strip-shaped materials.Wherein, the weight of the SBS, antiscorching agent, crosslinking agent and accelerating agent is：SBS 90 97, antiscorching agent 0.3 3, crosslinking agent 0.4 5, accelerating agent 15.Prilling of the present invention makes SBS be not crosslinked in the prilling stage with crosslinking agent, and in addition asphalt, under the shearing peptizaiton of high temperature building stones, reaction is crosslinked when being swollen dispersion and forms reticular structure, pitch is equably wrapped in wherein it is possible to improve the high temperature performance of SBS modified asphalt concrete systems, ageing-resistant performance and mechanical property etc..
Description
Technical field
The present invention relates to a kind of asphalt mixed material modifier particle and preparation method thereof more particularly to a kind of SBS and crosslinkings
Not crosslinked asphalt mixed material modifier particle of agent and preparation method thereof, belongs to road asphalt mixed material modifier field.
Background technology
SBS modifier is a kind of thermoplastic elastomer (TPE), is with butadiene and 1,3-styrene are monomer, using anion
Polymerization line style obtained or star block copolymer.It is practical since conventional SBS modified dose of fusing point is higher, is not easily dissolved dispersion
Colloid milling or the previously prepared SBS modified pitch of high speed shear method are mostly used in.Nevertheless, due to molecular structure, group
Cause the SBS and pitch thermodynamically incompatible at qualitative difference, SBS modified pitch is actually physically total
It is mixed, homogeneous system can not be formed, during long-term storage, it would still be possible to SBS coalescences can be led to, with separated from bitumen.
It is rear that " sulphur is introduced in modified pitch again in order to improve the quality stability and high temperature performance of SBS modified pitch
The method of change crosslinking " carries out vulcanization crosslinking, by adequately molten by the serial crosslinking agent such as sulphur to SBS modified pitch systems
Swollen development, to improve the quality stability and high temperature performance of modified pitch.But due to dense after SBS modifier addition matrix pitch
Degree substantially lowers, therefore long there are the reaction time, and production cycle slow disadvantage is not easy to production and construction.Moreover, in reality
Because of shut-down etc. caused by by weather and some other force majeure reason in, storage time is long, this kind of method still occurs
The various performance wild effects such as aging, isolation, quality decay, seriously affect the pavement performance of SBS modified pitch.
From the foregoing, it will be observed that current vulcanization crosslinking SBS modified pitch systems are long there are the reaction time, vulcanization crosslinking speed is slow,
And the shortcomings of unstable quality.The root SBS modifier of these problems is to be mixed into pitch in advance, and realize the difficulty that dry method is delivered directly
Point is to solve how to be effectively combined together SBS modifier with crosslinking agent, and is unlikely to cross-linking reaction occurs to early and cause
It is granulated difficult.Crosslinking occurs to early in SBS modifier and crosslinking agent, and mixture can lump, be hardened, on the one hand cause to be granulated difficulty or
It can not be granulated, on the other hand influence the performance of modifying function.
The present invention researches and develops a kind of novel vulcanization crosslinking system, by being improved to prilling, and it is anti-by being added
SBS and the not crosslinked granulation of crosslinking agent are realized in the methods of burnt agent, promote modified effect, improve production efficiency.
Invention content
The purpose of the present invention is being directed to the technical issues of depositing ability in existing SBS modified asphalt technologies, a kind of SBS is provided and is handed over
Join the not crosslinked prilling of agent, SBS is made in antiscorching agent and process modification to the present invention and crosslinking agent is not crosslinked changes by being added
Property agent particle, solve in existing modifying agent granulating technique and asked since the granulation difficulty that crosslinking is brought occurs to early in SBS and crosslinking agent
Topic, modified grain prepared by the present invention have been overturned previous mixed technological process in advance, can have been delivered directly in asphalt, and
And the cross-linking reaction time for shortening SBS modified pitch is played, it is easy to use, and SBS modified asphalt mixtures performance obtained is good.
A kind of SBS of one aspect of the present invention offer and the not crosslinked prilling of crosslinking agent, including：
Raw material SBS and antiscorching agent are uniformly mixed at normal temperatures, the first mixture is made；
Heating melt process is carried out to first mixture；
In the later stage for carrying out heating melt process to first mixture, crosslinking agent and accelerating agent is added, is made second
Mixture；
Extrusion process is carried out to second mixture, obtains strip-shaped materials；
Pelletizing processing is carried out to get to asphalt mixed material modifier particle to the strip-shaped materials.
Wherein, heating extrusion process is carried out to first mixture in an extruder.
In particular, the heating temperature section for carrying out heating melt process to first mixture in an extruder is 120
DEG C~160 DEG C.
Wherein, the crosslinking agent and accelerating agent is added from the extrusion drive end unit, it is made to be adhered to by heating at extrusion
On first mixture of reason, second mixture is made.
Especially, after the temperature for squeezing out drive end unit being down to 120 DEG C or less, institute is added from the extrusion drive end unit
State crosslinking agent and accelerating agent.
The temperature for squeezing out drive end unit is down to 120 DEG C hereinafter, adding crosslinking agent and accelerating agent, can preventing SBS and handing over
Connection agent generates crosslinking and blocks extrusion.
Wherein, the time of contact of the crosslinking agent and accelerating agent and the first mixture is less than 5s, i.e. crosslinking agent and accelerating agent
Be less than 5s to the time before extrusion from the first mixture being added to after melting, that is to say, that crosslinking agent and accelerating agent from
It is added to and forms time of second mixture to before squeezing out in the first mixture after melting less than 5s.
In particular, after second mixture is made, second mixture is squeezed out from the extruder immediately,
Obtain strip-shaped materials.
Especially, after second mixture is extruded, using 50-60 DEG C of water-bath cooling to get to the bar
Material.
In particular, being aerated drying to the strip-shaped materials, after removing its moisture, pelletizing processing is then carried out again.
Especially, present invention preferably employs following concrete modes：
It will be uniformly mixed under raw material SBS, antiscorching agent room temperature, the first mixture be made；
The first mixture is added by the feeding port of double screw extruder and carries out feeding, material is subjected to extruding conveying, this
Phase temperature is 120 DEG C~160 DEG C, and twin-screw rotating speed is controlled in 500r.p.m or less；
The second charge door is set in the tail portion of heating system, crosslinking agent and accelerating agent is added, the second mixture is made, at this time
Temperature control prevents to be crosslinked and block material mouth 120 DEG C or less (passing through cooling water control)；
The strip-shaped materials come out from head carry out refrigerated separation under water bath, and water temperature general control is prevented at 50-60 DEG C
The only too low broken strip of temperature, the excessively high adhesion of temperature, water temperature are more than addition cold water need to inwardly to be recycled, to keep temperature after 60 DEG C；
Strip-shaped materials need to blow down moisture by a dryer section with forced ventilation, then send billot to pelletizing room, carry out
Pelletizing processing is to get to asphalt mixed material modifier particle.
Other prilling process for meeting spirit of that invention are suitable for the present invention.
Wherein, the weight of the SBS, antiscorching agent, crosslinking agent and accelerating agent is：SBS 90-97, antiscorching agent 0.3-
3, crosslinking agent 0.4-5, accelerating agent 1-5.
In particular, the SBS, antiscorching agent, crosslinking agent and accelerating agent weight be preferably：It is SBS92-95, anti-scorch
Agent 0.5-2, crosslinking agent 1-4, accelerating agent 2-4.
Especially, the weight of the SBS, antiscorching agent, crosslinking agent and accelerating agent is more preferably：SBS 93-
94, antiscorching agent 1-1.5, crosslinking agent 2-3, accelerating agent 2.5-3.5.
Wherein, the SBS is one or more of styrene-butadiene-styrenes.
In particular, the melt index of the styrene-butadiene-styrene is more than 2.
Especially, when the melt index of the styrene-butadiene-styrene is less than 2, oil-filled place is carried out to it
Reason makes its melt index be more than 2.
Wherein, the antiscorching agent is that nitroso compound and/or N- cyclohexyl thios face phthalimide (CTP).
Antiscorching agent can prevent or processing and storage process of the slow sizing material before vulcanization in that prevulcanization (incipient scorch) occurs is existing
As, the present invention prevented by the way that antiscorching agent is added or delay SBS before vulcanization process in prevulcanization phenomenon occurs.
Wherein, the crosslinking agent is Sulfur and/or sulfur-containing compound.
Crosslinking agent can make SBS occur vulcanization crosslinking, the present invention by be added the control of antiscorching agent and technique make SBS with
Crosslinking agent is not crosslinked in the prilling stage, and after being added in pitch and stirring evenly, when crosslinking agent SBS crosslinkings reticulate knot
Structure equably wraps up pitch wherein, the excellent SBS modified pitch of forming properties.
Wherein, the accelerating agent includes metal oxide, dithiocarbamate accelerator, the promotion of xanthic acid salt
One or more of agent, thuriam acceserator, thiazole accelerator and sulfenamide type accelerators.
In particular, the metal oxide includes that calcium oxide, magnesium oxide or aluminum oxide are one such or several.
Accelerating agent can improve and improve the physical mechanical property and chemical stability of SBS modified pitch/asphalt.
Another aspect of the present invention provides a kind of asphalt mixed material modifier particle prepared using above-mentioned prilling, packet
It includes：SBS, antiscorching agent, crosslinking agent and accelerating agent.
Wherein, the weight of the SBS, antiscorching agent, crosslinking agent and accelerating agent is：SBS 90-97, antiscorching agent 0.3-
3, crosslinking agent 0.4-5, accelerating agent 1-5.
In particular, the SBS, antiscorching agent, crosslinking agent and accelerating agent weight be preferably：It is SBS92-95, anti-scorch
Agent 0.5-2, crosslinking agent 1-4, accelerating agent 2-4.
Especially, the weight of the SBS, antiscorching agent, crosslinking agent and accelerating agent is more preferably：SBS 93-
94, antiscorching agent 1-1.5, crosslinking agent 2-3, accelerating agent 2.5-3.5.
Wherein, the SBS is one or more of styrene-butadiene-styrenes.
In particular, the melt index of the styrene-butadiene-styrene is more than 2.
Especially, when the melt index of the styrene-butadiene-styrene is less than 2, oil-filled place is carried out to it
Reason makes its melt index be more than 2.
Wherein, the antiscorching agent is that nitroso compound and/or N- cyclohexyl thios face phthalimide.
Antiscorching agent can prevent or processing and storage process of the slow sizing material before vulcanization in that prevulcanization (incipient scorch) occurs is existing
As, the present invention prevented by the way that antiscorching agent is added or delay SBS before vulcanization process in prevulcanization phenomenon occurs.
Wherein, the crosslinking agent is sulphur and/or sulfur-containing compound.
Crosslinking agent can make SBS occur vulcanization crosslinking, the present invention by be added the control of antiscorching agent and technique make SBS with
Crosslinking agent is not crosslinked in the prilling stage, and after being added in heated bitumen and stirring evenly, in the case of a high temperature, crosslink
It reacts and forms reticular structure, pitch is equably wrapped up wherein, the excellent SBS modified pitch of forming properties or SBS are modified
Asphalt.
Wherein, the accelerating agent includes metal oxide, dithiocarbamate accelerator, the promotion of xanthic acid salt
One or more of agent, thuriam acceserator, thiazole accelerator and sulfenamide type accelerators.
In particular, the metal oxide includes that calcium oxide, magnesium oxide or aluminum oxide are one such or several.
Accelerating agent can shorten vulcanization time, improve rate of cure, and improve and improve SBS modified pitch/pitch mixing
The physical mechanical property and chemical stability of material.
Advantages of the present invention and advantageous effects are as follows：
1, prilling of the present invention makes SBS and crosslinking agent are not crosslinked in the prilling stage, and works as and be added in pitch simultaneously
After stirring evenly, crosslinking agent is cross-linked into reticular structure with finely dispersed SBS, and pitch is equably wrapped in wherein it is possible to carry
High temperature performance, ageing-resistant performance and the mechanical property etc. of high SBS modified pitch system.
2, the present invention prevented by the way that antiscorching agent is added or delay SBS before vulcanization process in that prevulcanization occurs is existing
As so that SBS is not crosslinked with crosslinking agent in the prilling stage.
3, the present invention improves granulation, i.e., the phase launches crosslinking agent and accelerating agent after the heating, and temperature controls at this time
At 120 DEG C hereinafter, and the material overall contact time be less than 5s, prevent cross-linking reaction, while crosslinking agent and promotion can be made again
Agent is effectively adhered on the first mixture.
4, the present invention uses vulcanization crosslinking accelerating agent, can improve the cross-linking efficiency and speed of SBS modified pitch, substantially contract
The time of short vulcanization crosslinking and effect improve and improve the physical mechanical property and chemical stability of modified pitch.
5, the preparation method of asphalt mixed material modifier particle of the present invention is simple for process quick, and particle obtained is then added to
The method that modified asphalt concrete is prepared in pitch is also fast and simple, is very suitable for engineering construction execute-in-place.
Specific implementation mode
Below by specific embodiment, the present invention is further explained, the advantages and features of the present invention will be with description and more
It is clear.But examples are merely exemplary for these, and it is not intended to limit the scope of the present invention in any way.Those skilled in the art
It should be understood that can be carried out without departing from the spirit and scope of the invention to the details and form of technical solution of the present invention
Modifications or substitutions, but these modifications and replacement are each fallen in protection scope of the present invention.
For the ease of comparison, test grade is matched and optimum oil-stone ratio is used uniformly listed in Table, and optimum oil-stone ratio is
4.3%, test grade, which is matched, see the table below：
1 embodiment 1 of table, 1 experiment grading of reference examples
Embodiment
1
1, it stocks up according to following weight：
2, it will be uniformly mixed under SBS, antiscorching agent room temperature, the first mixture be made；
The first mixture is added by the feeding port of double screw extruder and carries out feeding, material is subjected to extruding conveying, this
Phase temperature is 120 DEG C~160 DEG C, and twin-screw rotating speed is controlled in 500r.p.m or less；
The second charge door is set in the tail portion of heating system, crosslinking agent and accelerating agent is added, the second mixture is made, at this time
Temperature control prevents to be crosslinked and block discharge port 120 DEG C or less (passing through cooling water control)；
The strip-shaped materials come out from head carry out refrigerated separation under water bath, and water temperature general control is prevented at 50-60 DEG C
The only too low broken strip of temperature, the excessively high adhesion of temperature, water temperature are more than addition cold water need to inwardly to be recycled, to keep temperature after 60 DEG C；
Strip-shaped materials need to blow down moisture by a dryer section with forced ventilation, then send billot to pelletizing room, carry out
Pelletizing processing is to get to asphalt mixed material modifier particle.
3, asphalt mixed material modifier particle obtained and heat are gathered materials, matrix pitch adds according to following weight
Enter, mixes and stirs 180s；Miberal powder is added, 90s is mixed and stirred, you can SBS modified asphalt concretes are made, temperature control is carried out according to table 2；
Gather materials 1000
Pitch 40
Modified grain 3.
2 laboratory test SBS modified asphalt mixtures of table mix and stir, forming temperature control parameter
| Mineral heating up temperature | 185℃ |
| Plain asphalt heating temperature | 160℃ |
| Asphalt mixes and stirs temperature | 180℃ |
| Hit reality and track forming temperature | 165℃ |
Alternatively, the number of the SBS in the present embodiment is also an option that the range such as 90,91,92,93 or 97 exists
Numerical value between 90-97.
Alternatively, the antiscorching agent in the present embodiment can select nitroso compound and/or N- cyclohexyl thios to face benzene
Dicarboximide, total number can select numerical value of the range between 0.3-3 such as 0.3,1.5,2,2.5 or 3.
Alternatively, the crosslinking agent in the present embodiment can select sulphur and/or sulfur-containing compound, total number that can select
Such as the numerical value of the ranges between 0.4-5 such as 0.4,0.8,1.5,2,4 or 5.
Alternatively, the accelerating agent in the present embodiment can select calcium oxide, magnesium oxide, aluminum oxide, two thio
Carbamates accelerating agent, xanthate accelerator, thuriam acceserator, thiazole accelerator and sulfenamide promote
Into one or more of agent, total number can select numerical value of the range between 1-5 such as 1,2.5,3,4 or 5.
The present embodiment method not will produce blocking discharging lip reflex, and be modified drip to obtained SBS when SBS is granulated
The test result that green concrete carries out index Test shows the Marshalls of SBS modified asphalt concretes obtained in the present embodiment
Stability is 9.0-13.8kN, and residual stability 89.5-94.0%, freeze-thaw split intensity ratio is 88.0-92.5%, track examination
It is 6800-9300 times/mm to test dynamic stability, and low-temperature bending failure strain is 2900-3721 μ ε.
Reference examples 1
In reference examples 1 other than being added without antiscorching agent, remaining uniform embodiment 1 is identical.
The present embodiment method is easy to block discharge port, be granulated difficult when being granulated because crosslinking reaction.Using this granulation
Index Test is carried out to obtained SBS modified asphalt concretes, test shows SBS modified pitch obtained in the present embodiment
The Marshall stability of concrete is 9.2kN, and residual stability 81%, freeze-thaw split intensity ratio is 64%, and wheel tracking test is dynamic
Stability is 980 times/mm, and low-temperature bending failure strain is 2100 μ ε.Through examining, there are black insoluble matters in modified pitch.
Thus the comparison of embodiment 1 and reference examples 1 is it is found that be added without antiscorching agent when being granulated, because crosslinking reaction appearance
Discharge port is easily blocked, or even can not be granulated.Thus the modified asphalt concrete performance prepared decreases, and in modified pitch
There are black insoluble matter, main reason is that SBS modifier can not melt dispersion in pitch again after vulcanization crosslinking, substantially without
Method plays modifying function.
Above-described embodiment is merely exemplary the foundation for making can to implement to illustrate the invention, but does not limit this hair
It is bright, when gather materials selection 1000 parts when, pitch is also an option that number of the range between 30-70 such as 30,50,60 or 70,
Modified grain is also an option that the number of the ranges such as 2,3,4,5 or 6 between 2 and 6 to implement the present invention, corresponding number choosing
Corresponding different raw material grading is selected, it is selected above to be suitable for the present invention.
Claims (8)
1. a kind of SBS and the not crosslinked prilling of crosslinking agent, which is characterized in that including：
Raw material SBS and antiscorching agent are uniformly mixed at normal temperatures, the first mixture is made；
Heating melt process is carried out to first mixture；
In the later stage for carrying out heating melt process to first mixture, crosslinking agent and accelerating agent is added, the second mixing is made
Object；
Extrusion process is carried out to second mixture, obtains strip-shaped materials；
Pelletizing processing is carried out to get to asphalt mixed material modifier particle to the strip-shaped materials；
Wherein, the time of contact of the crosslinking agent and accelerating agent and the first mixture is less than 5s；
Wherein, after the temperature for squeezing out drive end unit being down to 120 DEG C or less, the crosslinking is added from the extrusion drive end unit
Agent and accelerating agent.
2. prilling according to claim 1, which is characterized in that add in an extruder to first mixture
Heat fusing processing.
3. prilling according to claim 2, which is characterized in that add in an extruder to first mixture
The heating temperature section of heat fusing processing is 120 DEG C~160 DEG C.
4. prilling according to claim 2, which is characterized in that from the extrusion drive end unit be added the crosslinking agent and
Accelerating agent makes it be adhered on the first mixture by heating extrusion process, second mixture is made.
5. prilling according to claim 2, which is characterized in that after second mixture is made, immediately by institute
It states the second mixture to squeeze out from the extruder, obtains strip-shaped materials.
6. prilling according to claim 5, which is characterized in that after second mixture is extruded, using 50-60
DEG C water-bath cooling to get to the strip-shaped materials.
7. prilling according to claim 1, which is characterized in that the SBS, antiscorching agent, crosslinking agent and accelerating agent
Weight is：SBS 90-97, antiscorching agent 0.3-3, crosslinking agent 0.4-5, accelerating agent 1-5.
8. a kind of asphalt mixed material modifier particle prepared using prilling described in claim 1, which is characterized in that packet
It includes：SBS, antiscorching agent, crosslinking agent and accelerating agent.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1339557A (en) * | 2000-08-18 | 2002-03-13 | 中国石油化工股份有限公司 | Process for preparing modified asphalt with improved storage stability |
| CN102140253A (en) * | 2011-01-10 | 2011-08-03 | 东南大学 | Special low-viscosity easy-dispersion regenerant for modified asphalt and preparation method thereof |
| CN104693565A (en) * | 2015-02-12 | 2015-06-10 | 北京路德永泰环保科技有限公司 | Composite waste-rubber-powder particles capable of being stored stably and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6927245B2 (en) * | 2003-06-04 | 2005-08-09 | Fina Technology, Inc. | Dispersing agent and method for the delivery of cross-linking agent to polymer modified asphalt compositions |
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2016
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1339557A (en) * | 2000-08-18 | 2002-03-13 | 中国石油化工股份有限公司 | Process for preparing modified asphalt with improved storage stability |
| CN102140253A (en) * | 2011-01-10 | 2011-08-03 | 东南大学 | Special low-viscosity easy-dispersion regenerant for modified asphalt and preparation method thereof |
| CN104693565A (en) * | 2015-02-12 | 2015-06-10 | 北京路德永泰环保科技有限公司 | Composite waste-rubber-powder particles capable of being stored stably and preparation method thereof |
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