CN109294255A - A kind of high-viscosity high-elasticity modified pitch and preparation method thereof - Google Patents
A kind of high-viscosity high-elasticity modified pitch and preparation method thereof Download PDFInfo
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- CN109294255A CN109294255A CN201811156076.8A CN201811156076A CN109294255A CN 109294255 A CN109294255 A CN 109294255A CN 201811156076 A CN201811156076 A CN 201811156076A CN 109294255 A CN109294255 A CN 109294255A
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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
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- 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
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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
- 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
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/04—Polymer mixtures characterised by other features containing interpenetrating networks
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Abstract
The invention discloses a kind of high-viscosity high-elasticity modified pitch and preparation method thereof, the high-viscosity high-elasticity modified pitch is made of the raw material of following weight percent meter: Styrene-Butadiene-Styrene Block Copolymer 6~10%, stabilizer 0.1~0.3%, aromatic hydrocarbons extraction oil 2~6%, PE modifying agent 0.4~1.5%, remaining is matrix pitch.The present invention is by adjusting line style and the proportion of star-shaped sbs modifying agent, addition aromatic hydrocarbons extraction oil and PE Modifiers balance index relationship, it can be obtained using the production technology mode of modified asphalt, production cost is low, high production efficiency, function admirable, the stabilization of product, its high temperature index softening point is greater than 90 DEG C, 60 DEG C of dynamic viscosities are greater than 100000Pa.s, elasticity is restored to be restored to 95% or more in 5 minutes before aging, 75% or more is restored to after aging after five minutes, really solves other similar modified bitumen products only high viscous not high-elastic technical problem.
Description
Technical field
The present invention relates to Expressway Pavement Material technical fields, are to be related to a kind of high-viscosity high-elasticity modified pitch more specifically
And preparation method thereof.
Background technique
In recent years, with highway in China build rapid development, mileage in highway open to traffic year by year rapid growth while, highway
Vehicle flowrate and heavy-duty vehicle increase sharply road pavement quality requirement it is higher and higher, extend the service life of highway, become to carve
Do not allow to delay.High-viscosity high-elasticity modified pitch is due to standby with good high-temperature stability, low-temperature cracking-resistance and elastic recovery capability
By the high praise of research and development institution, owner and unit in charge of construction.
Currently, being carried out in domestic communication portion JTG F40, national standard GB/T 30516 specification to high-viscosity high-elasticity modified pitch index
Regulatory requirements, but from the point of view of technical requirement, 60 DEG C of dynamic viscosities require relatively low, require nothing more than not less than 20000Pa.s,
Conventional method detection elasticity is restored to be not less than 85%, and it is big not to be able to satisfy big, the heavily loaded overloaded vehicle ratio of the Current Domestic volume of traffic
Status.Existing some high-viscosity high-elasticity modified pitch using the agent of import TPS high adhered modification or using SBS with shoddy is compound changes
The disadvantages of technological means of property, for above-mentioned technological means there are high production cost, production efficiency is slow, and stability is poor and influence its popularization
And application.
Summary of the invention
It is an object of the invention to overcome drawbacks described above in the prior art, provide a kind of high-viscosity high-elasticity modified pitch and its
Preparation method.
To achieve the above object, the first aspect of the present invention provides a kind of high-viscosity high-elasticity modified pitch, by weighing as follows
Measure the raw material composition of percentages:
Styrene-Butadiene-Styrene Block Copolymer (SBS) 6~10%, stabilizer 0.1~0.3%, aromatic hydrocarbons extraction
2~6%, PE of oil modifying agent 0.4~1.5%, remaining is matrix pitch；
Wherein, the Styrene-Butadiene-Styrene Block Copolymer is styrene-butadiene-benzene second of linear structure
The Styrene-Butadiene-Styrene Block Copolymer of alkene block copolymer and hub-and-spoke configuration is in (1.5~2): 1 ratio mixing and
At.
Preferably, the molecular weight of the Styrene-Butadiene-Styrene Block Copolymer of the linear structure be 8~
150000, the molecular weight of the Styrene-Butadiene-Styrene Block Copolymer of the hub-and-spoke configuration is 20~300,000.
Preferably, the stabilizer is made of the raw material of following weight percent meter: sulphur powder 30~40% increases
Mould agent 10~20%, asbestos plaster 20%, precipitated calcium carbonate 10%, carbon black 20~25%.The stabilizer is yellow black mixture.
Preferably, the PE modifying agent is polyethylene, it is with polymer made of vinyl monomer polymerization, is crystallization heat
Plastic resin, the PE modifying agent are the wax-like particulate materials through extruding pelletization using the PE resin of processing and forming, and appearance is in
Milky, molecular weight are 1~100,000.
Preferably, the aromatic hydrocarbons extraction oil is a kind of as main component with esters, alcohols, fatty acid compound
Mixture, is dark brown or blackish green viscous liquid under room temperature, and 100 DEG C of kinematic viscosity are 10~30pa.s (average molecular weight
Lower, viscosity is lower, and lower temperature resistance is better, but heat resistance is poorer, and flash-point is lower；Average molecular weight is higher, and viscosity is higher, resistance to low
Warm nature is more poor).Principle is mainly the following: 1, containing great amount of hydroxy group, ester group, carboxyl, these officials in the mixture molecule
The function of having thermo oxidative aging in itself can be rolled into a ball；2, the cold plasticity of pitch can be improved in the mixture, thus improves the low of pitch
Warm ductility；3, the functional groups such as hydroxyl, carboxyl in the mixture can occur with carboxyl in pitch studies on asphaltene, colloid or hydroxyl
Esterification, the carboxylate of generation are also improved the effect of pitch cold plasticity.
Preferably, the matrix pitch is the 70# matrix pitch of import.The more domestic matrix of the matrix pitch of import
Pitch contains more aromatic contents, and aromatic hydrocarbon relatively dissolves SBS modifier well again, domestic by multiple repetition test
The various phenomenons such as isolation easily occurs after adding higher dosage SBS modifier for pitch, performance indicator is unstable, and relative to fragrance
The higher import matrix pitch of hydrocarbon content and modifying agent have more preferable com-patibilising effect.
The second aspect of the present invention provides a kind of preparation side of high-viscosity high-elasticity modified pitch described in above-mentioned technical proposal
Method, comprising the following steps:
(1) matrix pitch is heated to 140 DEG C, circulation 30min is sufficiently stirred in addition aromatic hydrocarbons extraction oil；
(2) continuing to add Styrene-Butadiene-Styrene Block Copolymer and PE modifying agent, stirring is warming up to 180 DEG C,
The insulated and stirred 30min at 180~190 DEG C；
(3) high speed shear 1h is carried out under conditions of temperature is 180~195 DEG C, shear rate is 4000r/min；
(4) after stopping shearing 30min, addition stabilizer, which is stirred for development 1h, at 175~185 DEG C can be prepared by high viscous height
Play modified pitch finished product.
Compared with prior art, the beneficial effects of the present invention are:
1, the present invention is by adjusting line style and star-shaped sbs modifying agent (i.e. Styrene-Butadiene-Styrene Block Copolymer)
Proportion, addition aromatic hydrocarbons extraction oil and PE Modifiers balance index relationship, using the production technology side of modified asphalt
Formula can be obtained, and production cost is low, high production efficiency, function admirable, the stabilization of the product, and high temperature index softening point is greater than 90
DEG C, 60 DEG C of dynamic viscosities (vacuum capillary tube method) are greater than 100000Pa.s, (old using the dedicated detection means of high-elastic modified asphalt
Elasticity is restored to be restored to 95% or more in 5 minutes before changing, and is restored to 75% or more after aging after five minutes) it is detected, really solve
Other similar modified bitumen products of having determined are only high to glue not high-elastic technical problem.
2, the present invention joined the SBS modifier of high dose in matrix pitch, it is made in the way of high speed shear uniformly
It is distributed in pitch, the ageing-resistant performance, mechanical property and elastic recovery of pitch has been significantly increased in addition SBS modifier
Can, it can effectively improve the high temperature stability performance of pitch while improve the crack resistance at low-temperature of pitch；It is extracted out using aromatic hydrocarbons
Oil effectively promotes the low-temperature ductility of high-viscosity high-elasticity modified pitch under the conditions of ensuring that high-viscosity high-elasticity asphalt product has stable high-temperature performance
Index；PE modifying agent can increase intermolecular interaction force as tackifier.
3, containing sulphur, plasticizer, asbestos plaster and carbon black in the stabilizer that the present invention uses, the addition of sulphur forms crosslinking
Key, so that forming interpenetrating networks between SBS and pitch, modified pitch plasticity and toughness is can be improved in plasticizer, and asbestos plaster increases
The adhesiveness of SBS, carbon black enhances ageing resistance, therefore high-viscosity asphalt storage stability of the invention is superior, is not easy to isolate.
Detailed description of the invention
Fig. 1 is the flow chart of the preparation method of high-viscosity high-elasticity modified pitch provided in an embodiment of the present invention.
Specific embodiment
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
Embodiment 1
A kind of high-viscosity high-elasticity modified pitch is made of the raw material of following weight percent meter:
Lee grows honor SBS 35015.2%, the long honor SBS 34112.8% of Lee, stabilizer 0.2%, aromatic hydrocarbons extraction 3%, PE of oil
Modifying agent 1.2%, Thailand's IRPC 70# matrix pitch 87.6%；
The preparation method of the high-viscosity high-elasticity modified pitch is as shown in flow chart 1, comprising the following steps:
(1) matrix pitch is heated to 140 DEG C, circulation 30min is sufficiently stirred in addition aromatic hydrocarbons extraction oil；
(2) continuing to add Styrene-Butadiene-Styrene Block Copolymer and PE modifying agent, stirring is warming up to 180 DEG C,
The insulated and stirred 30min at 180~190 DEG C；
(3) high speed shear 1h is carried out under conditions of temperature is 180~195 DEG C, shear rate is 4000r/min；
(4) after stopping shearing 30min, addition stabilizer, which is stirred for development 1h, at 175~185 DEG C can be prepared by high viscous height
Play modified pitch finished product.
According to test method specified in " highway engineering pitch and Asphalt Mixture Experiment regulation " (JTG E20-2011)
With using high elasticity modified asphalt detection method, to embodiment 1 prepare high-viscosity high-elasticity modified pitch Specifications
It is tested, test result is shown in Table 1.
1 embodiment of table, 1 high-viscosity high-elasticity performance of modified bitumen
Embodiment 2
A kind of high-viscosity high-elasticity modified pitch is made of the raw material of following weight percent meter:
LG SBS 5015.4%, LG SBS 4112.8%, stabilizer 0.2%, aromatic hydrocarbons extract oil 3%, PE modifying agent out
1.0%, Thailand's IRPC 70# matrix pitch 87.6%；
The preparation method of the high-viscosity high-elasticity modified pitch is as shown in flow chart 1, comprising the following steps:
(1) matrix pitch is heated to 140 DEG C, circulation 30min is sufficiently stirred in addition aromatic hydrocarbons extraction oil；
(2) continuing to add Styrene-Butadiene-Styrene Block Copolymer and PE modifying agent, stirring is warming up to 180 DEG C,
The insulated and stirred 30min at 180~190 DEG C；
(3) high speed shear 1h is carried out under conditions of temperature is 180~195 DEG C, shear rate is 4000r/min；
(4) after stopping shearing 30min, addition stabilizer, which is stirred for development 1h, at 175~185 DEG C can be prepared by high viscous height
Play modified pitch finished product.
According to test method specified in " highway engineering pitch and Asphalt Mixture Experiment regulation " (JTG E20-2011)
With using high elasticity modified asphalt detection method, to embodiment 2 prepare high-viscosity high-elasticity modified pitch Specifications
It is tested, test result is shown in Table 2.
2 embodiment of table, 2 high-viscosity high-elasticity performance of modified bitumen
Embodiment 3
A kind of high-viscosity high-elasticity modified pitch is made of the raw material of following weight percent meter:
Lee grow honor SBS 35015.1%, LG SBS 4112.7%, stabilizer 0.2%, aromatic hydrocarbons extract out 3.2%, PE of oil change
Property agent 0.8%, shell 70# matrix pitch 88%；
The preparation method of the high-viscosity high-elasticity modified pitch, comprising the following steps:
(1) matrix pitch is heated to 140 DEG C, circulation 30min is sufficiently stirred in addition aromatic hydrocarbons extraction oil；
(2) continuing to add Styrene-Butadiene-Styrene Block Copolymer and PE modifying agent, stirring is warming up to 180 DEG C,
The insulated and stirred 30min at 180~190 DEG C；
(3) high speed shear 1h is carried out under conditions of temperature is 180~195 DEG C, shear rate is 4000r/min；
(4) after stopping shearing 30min, addition stabilizer, which is stirred for development 1h, at 175~185 DEG C can be prepared by high viscous height
Play modified pitch finished product.
According to test method specified in " highway engineering pitch and Asphalt Mixture Experiment regulation " (JTG E20-2011)
With using high elasticity modified asphalt detection method, to embodiment 3 prepare high-viscosity high-elasticity modified pitch Specifications
It is tested, test result is shown in Table 3.
3 embodiment of table, 3 high-viscosity high-elasticity performance of modified bitumen
It can be found with import TPS high adhered modification agent or using the SBS technological means comparison powder compound modified with scrap rubber, this hair
Bright high-viscosity high-elasticity modified pitch is more excellent on conventional index.According to test it is found that the embodiment of the present invention 1, embodiment
2,60 DEG C of dynamic viscosities of embodiment 3 and elasticity recovery are above GBT 30516-2014 " high-viscosity high-elasticity road asphalt " specification and want
It asks, and storage stability of the invention is more preferable；Being indicated above high-viscosity high-elasticity modified pitch ratio TPS high-viscosity asphalt of the invention has
Better adhesiveness and mixing and stirring property of construction, and have preferable storage stability；Present invention ratio TPS high-viscosity asphalt is more just in price
Preferably, construction environmental protection more eased than use SBS and the powder compound modified technological means of scrap rubber, has stronger competitive advantage and society
It can be worth.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (7)
1. a kind of high-viscosity high-elasticity modified pitch, which is characterized in that be made of the raw material of following weight percent meter:
Styrene-Butadiene-Styrene Block Copolymer 6~10%, stabilizer 0.1~0.3%, aromatic hydrocarbons extraction oil 2~6%,
PE modifying agent 0.4~1.5%, remaining is matrix pitch；
Wherein, the Styrene-Butadiene-Styrene Block Copolymer is that the s-B-S of linear structure is embedding
The Styrene-Butadiene-Styrene Block Copolymer of section copolymer and hub-and-spoke configuration is in (1.5~2): 1 ratio mixes.
2. a kind of high-viscosity high-elasticity modified pitch according to claim 1, which is characterized in that the benzene second of the linear structure
Alkene-butadiene-styrene block copolymer molecular weight is 8~150,000, styrene-butadiene-benzene second of the hub-and-spoke configuration
The molecular weight of alkene block copolymer is 20~300,000.
3. a kind of high-viscosity high-elasticity modified pitch according to claim 1, which is characterized in that the stabilizer is by weighing as follows
The raw material for measuring percentages forms: sulphur powder 30~40%, plasticizer 10~20%, asbestos plaster 20%, precipitated calcium carbonate 10%,
Carbon black 20~25%.
4. a kind of high-viscosity high-elasticity modified pitch according to claim 1, which is characterized in that the PE modifying agent is poly- second
Alkene, molecular weight are 1~100,000.
5. a kind of high-viscosity high-elasticity modified pitch according to claim 1, which is characterized in that the aromatic hydrocarbons extraction oil is a kind of
It is dark brown or blackish green thick liquid under room temperature with esters, alcohols, fatty acid compound mixture as main component
Body, 100 DEG C of kinematic viscosity are 10~30pa.s.
6. a kind of high-viscosity high-elasticity modified pitch according to claim 1, which is characterized in that the matrix pitch is import
70# matrix pitch.
7. the preparation method of high-viscosity high-elasticity modified pitch described in a kind of any one of claim 1~6, which is characterized in that
The following steps are included:
(1) matrix pitch is heated to 140 DEG C, circulation 30min is sufficiently stirred in addition aromatic hydrocarbons extraction oil；
(2) continue to add Styrene-Butadiene-Styrene Block Copolymer and PE modifying agent, stirring is warming up to 180 DEG C, 180
Insulated and stirred 30min at~190 DEG C；
(3) high speed shear 1h is carried out under conditions of temperature is 180~195 DEG C, shear rate is 4000r/min；
(4) after stopping shearing 30min, stabilizer is added at 175~185 DEG C being stirred for development 1h can be prepared by high-viscosity high-elasticity and changes
Property pitch finished product.
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Cited By (6)
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| CN110982286A (en) * | 2019-12-13 | 2020-04-10 | 江苏新越沥青产业研发有限公司 | High-viscosity modified asphalt and preparation method thereof |
| CN111893878A (en) * | 2020-09-08 | 2020-11-06 | 中交一公局重庆万州高速公路有限公司 | Steel box girder bridge deck pavement structure and construction method |
| CN113698778A (en) * | 2020-11-19 | 2021-11-26 | 海南杰众石化有限公司 | Preparation method of modified environment-friendly asphalt |
| CN113943491A (en) * | 2021-11-17 | 2022-01-18 | 东莞泰和沥青产品有限公司 | Low-temperature high-viscosity modified asphalt and processing technology thereof |
| CN114806193A (en) * | 2022-03-16 | 2022-07-29 | 长安大学 | Direct-vat-set high-viscosity asphalt modifier and preparation method and application thereof |
| CN116694093A (en) * | 2023-06-13 | 2023-09-05 | 江苏路邦土木科技有限公司 | High-viscosity modified asphalt for water-permeable pavement and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110982286A (en) * | 2019-12-13 | 2020-04-10 | 江苏新越沥青产业研发有限公司 | High-viscosity modified asphalt and preparation method thereof |
| CN111893878A (en) * | 2020-09-08 | 2020-11-06 | 中交一公局重庆万州高速公路有限公司 | Steel box girder bridge deck pavement structure and construction method |
| CN113698778A (en) * | 2020-11-19 | 2021-11-26 | 海南杰众石化有限公司 | Preparation method of modified environment-friendly asphalt |
| CN113943491A (en) * | 2021-11-17 | 2022-01-18 | 东莞泰和沥青产品有限公司 | Low-temperature high-viscosity modified asphalt and processing technology thereof |
| CN114806193A (en) * | 2022-03-16 | 2022-07-29 | 长安大学 | Direct-vat-set high-viscosity asphalt modifier and preparation method and application thereof |
| CN116694093A (en) * | 2023-06-13 | 2023-09-05 | 江苏路邦土木科技有限公司 | High-viscosity modified asphalt for water-permeable pavement and preparation method thereof |
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