CN112625393A - Polymer modified asphalt and preparation method thereof - Google Patents
Polymer modified asphalt and preparation method thereof Download PDFInfo
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- CN112625393A CN112625393A CN201910907764.1A CN201910907764A CN112625393A CN 112625393 A CN112625393 A CN 112625393A CN 201910907764 A CN201910907764 A CN 201910907764A CN 112625393 A CN112625393 A CN 112625393A
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- Prior art keywords
- asphalt
- parts
- modified asphalt
- shearing
- speed
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- 239000010426 asphalt Substances 0.000 title claims abstract description 145
- 229920000642 polymer Polymers 0.000 title claims abstract description 54
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000000839 emulsion Substances 0.000 claims abstract description 32
- 239000007822 coupling agent Substances 0.000 claims abstract description 28
- 125000000129 anionic group Chemical group 0.000 claims abstract description 19
- 125000002091 cationic group Chemical group 0.000 claims abstract description 18
- 150000001768 cations Chemical class 0.000 claims abstract description 18
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 16
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 238000010008 shearing Methods 0.000 claims description 39
- 238000003756 stirring Methods 0.000 claims description 38
- 239000000203 mixture Substances 0.000 claims description 19
- 239000003208 petroleum Substances 0.000 claims description 14
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 12
- 239000000440 bentonite Substances 0.000 claims description 11
- 229910000278 bentonite Inorganic materials 0.000 claims description 11
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000002253 acid Substances 0.000 claims description 10
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 10
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 claims description 6
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical group [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 claims description 6
- UKRDPEFKFJNXQM-UHFFFAOYSA-N vinylsilane Chemical compound [SiH3]C=C UKRDPEFKFJNXQM-UHFFFAOYSA-N 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 4
- CPGFMWPQXUXQRX-UHFFFAOYSA-N 3-amino-3-(4-fluorophenyl)propanoic acid Chemical compound OC(=O)CC(N)C1=CC=C(F)C=C1 CPGFMWPQXUXQRX-UHFFFAOYSA-N 0.000 claims description 3
- SJECZPVISLOESU-UHFFFAOYSA-N 3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCN SJECZPVISLOESU-UHFFFAOYSA-N 0.000 claims description 3
- GIUBHMDTOCBOPA-UHFFFAOYSA-N 3h-1,3-benzothiazole-2-thione;zinc Chemical compound [Zn].C1=CC=C2SC(S)=NC2=C1 GIUBHMDTOCBOPA-UHFFFAOYSA-N 0.000 claims description 3
- NOZAQBYNLKNDRT-UHFFFAOYSA-N [diacetyloxy(ethenyl)silyl] acetate Chemical compound CC(=O)O[Si](OC(C)=O)(OC(C)=O)C=C NOZAQBYNLKNDRT-UHFFFAOYSA-N 0.000 claims description 3
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 3
- WOXXJEVNDJOOLV-UHFFFAOYSA-N ethenyl-tris(2-methoxyethoxy)silane Chemical compound COCCO[Si](OCCOC)(OCCOC)C=C WOXXJEVNDJOOLV-UHFFFAOYSA-N 0.000 claims description 3
- BQRPSOKLSZSNAR-UHFFFAOYSA-N ethenyl-tris[(2-methylpropan-2-yl)oxy]silane Chemical compound CC(C)(C)O[Si](OC(C)(C)C)(OC(C)(C)C)C=C BQRPSOKLSZSNAR-UHFFFAOYSA-N 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- INJVFBCDVXYHGQ-UHFFFAOYSA-N n'-(3-triethoxysilylpropyl)ethane-1,2-diamine Chemical compound CCO[Si](OCC)(OCC)CCCNCCN INJVFBCDVXYHGQ-UHFFFAOYSA-N 0.000 claims description 3
- PHQOGHDTIVQXHL-UHFFFAOYSA-N n'-(3-trimethoxysilylpropyl)ethane-1,2-diamine Chemical compound CO[Si](OC)(OC)CCCNCCN PHQOGHDTIVQXHL-UHFFFAOYSA-N 0.000 claims description 3
- MQWFLKHKWJMCEN-UHFFFAOYSA-N n'-[3-[dimethoxy(methyl)silyl]propyl]ethane-1,2-diamine Chemical compound CO[Si](C)(OC)CCCNCCN MQWFLKHKWJMCEN-UHFFFAOYSA-N 0.000 claims description 3
- DEQZTKGFXNUBJL-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)cyclohexanamine Chemical compound C1CCCCC1NSC1=NC2=CC=CC=C2S1 DEQZTKGFXNUBJL-UHFFFAOYSA-N 0.000 claims description 3
- VNBLTKHUCJLFSB-UHFFFAOYSA-N n-(trimethoxysilylmethyl)aniline Chemical compound CO[Si](OC)(OC)CNC1=CC=CC=C1 VNBLTKHUCJLFSB-UHFFFAOYSA-N 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- RKQOSDAEEGPRER-UHFFFAOYSA-L zinc diethyldithiocarbamate Chemical compound [Zn+2].CCN(CC)C([S-])=S.CCN(CC)C([S-])=S RKQOSDAEEGPRER-UHFFFAOYSA-L 0.000 claims description 3
- KMNUDJAXRXUZQS-UHFFFAOYSA-L zinc;n-ethyl-n-phenylcarbamodithioate Chemical compound [Zn+2].CCN(C([S-])=S)C1=CC=CC=C1.CCN(C([S-])=S)C1=CC=CC=C1 KMNUDJAXRXUZQS-UHFFFAOYSA-L 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 9
- 239000002245 particle Substances 0.000 description 8
- 239000006185 dispersion Substances 0.000 description 7
- 230000002776 aggregation Effects 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- 238000004220 aggregation Methods 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- CQBLUJRVOKGWCF-UHFFFAOYSA-N [O].[AlH3] Chemical compound [O].[AlH3] CQBLUJRVOKGWCF-UHFFFAOYSA-N 0.000 description 2
- OBNDGIHQAIXEAO-UHFFFAOYSA-N [O].[Si] Chemical compound [O].[Si] OBNDGIHQAIXEAO-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 239000000693 micelle Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000001132 ultrasonic dispersion Methods 0.000 description 2
- 230000006750 UV protection Effects 0.000 description 1
- -1 acrylic ester Chemical class 0.000 description 1
- 239000012874 anionic emulsifier Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000004224 protection Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
-
- 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
- C08L95/005—Aqueous compositions, e.g. emulsions
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2395/00—Bituminous materials, e.g. asphalt, tar or pitch
-
- 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
-
- 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
- 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
-
- 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
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2312/00—Crosslinking
-
- 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
- C08L2555/50—Inorganic non-macromolecular ingredients
-
- 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
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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)
- Dispersion Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of asphalt production, in particular to polymer modified asphalt and a preparation method thereof, wherein the polymer modified asphalt comprises the following raw materials in parts by weight: acrylic acid elastic emulsion: 100-200 parts; anionic emulsified asphalt: 50-120 parts; cation emulsified asphalt: 50-120 parts; coupling agent: 5-10 parts; accelerator (b): 5-10 parts; a compatilizer: 15-20 parts of acrylic acid elastic emulsion, anionic emulsified asphalt and cationic emulsified asphalt in a ratio of 1: 1: 1 or 2: 1: 1. the modified asphalt prepared by the invention has good ductility and good elastic effect, does not mildew for 11-15 years, has excellent mildew-resistant effect and long service life, can resist low temperature of-25 ℃ and high temperature of 95 ℃, combines the acrylic acid elastic emulsion with the anionic emulsified asphalt firstly, and then adds the cationic emulsified asphalt, and the sequential addition can ensure that the prepared polymer modified asphalt has ductility, and can quickly realize the combination of the acrylic acid elastic emulsion and the cationic asphalt.
Description
Technical Field
The invention relates to the technical field of dirty asphalt production, in particular to polymer modified asphalt and a preparation method thereof.
Background
Asphalt used in road paving is usually emulsified asphalt, and if the ductility, elasticity and mildew resistance of asphalt are improved, an elastic emulsion is required to be added. The existing cationic emulsified asphalt can not be added with the propyl acid elastic emulsion, the phenomenon that the whole emulsified asphalt is whitened can occur after the propyl acid elastic emulsion is added, the emulsified asphalt becomes thick and is inconvenient to construct and stir, the emulsified asphalt can slowly become black after being dried after being laid on a road, the low-temperature and high-temperature resistant effects are poor, and the emulsified asphalt can mildew in 1-2 years.
Disclosure of Invention
The invention aims to provide polymer modified asphalt and a preparation method thereof, which aim to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the polymer modified asphalt comprises the following raw materials in parts by weight:
acrylic acid elastic emulsion: 100-200 parts;
anionic emulsified asphalt: 50-120 parts;
cation emulsified asphalt: 50-120 parts;
coupling agent: 5-10 parts;
accelerator (b): 5-10 parts;
a compatilizer: 15-20 parts.
Preferably, the coupling agent is an aminosilane coupling agent or a vinylsilane coupling agent, the aminosilane coupling agent is any one of N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, anilinomethyltrimethoxysilane, N-aminoethyl-3-aminopropylmethyldimethoxysilane, N-aminoethyl-3-aminopropyltriethoxysilane or 3-aminopropyltrimethoxysilane, and the vinylsilane coupling agent is any one of vinyltris (beta-methoxyethoxy) silane, vinyltrimethoxysilane, vinyltri-tert-butoxysilane, vinyltri-tert-butylperoxysilane or vinyltriacetoxysilane.
Preferably, the accelerator is any one of zinc diethyldithiocarbamate, zinc ethylphenyldithiocarbamate, dipentamethylenethiuram tetrasulfide, zinc 2-mercaptobenzothiazole, or N-cyclohexyl-2-benzothiazylsulfenamide.
Preferably, the compatilizer is one or more of reduced-trilinear extracted oil, reduced-trilinear extracted oil and furfural extracted oil.
Preferably, the ratio of the acrylic acid elastic emulsion, the anionic emulsified asphalt and the cationic emulsified asphalt is 1: 1: 1 or 2: 1: 1.
on the other hand, the invention also provides a preparation method of the polymer modified asphalt, which comprises the following steps:
s1: weighing the raw materials in parts by weight;
s2: uniformly mixing the weighed propyl acid elastic emulsion, the weighed anionic emulsified asphalt and the weighed cationic emulsified asphalt at the temperature of 250-270 ℃ while stirring and ultrasonically dispersing for 4-8min, wherein the ultrasonic frequency is 30-80KHz, so as to obtain a basic asphalt mixture;
s3: adding the weighed coupling agent, the accelerator and the compatilizer into the basic asphalt mixture obtained in the step S1, stirring and ultrasonically dispersing, and reacting at the temperature of 250-270 ℃ for 20-30min, wherein the ultrasonic frequency is 50-100 KHz;
s4: and shearing by using a high-speed shearing machine, and naturally cooling to room temperature to obtain the polymer modified asphalt.
Preferably, the operation steps of the shearing treatment are as follows: controlling the speed of the high-speed shearing machine, shearing at low speed for 3-5min under the condition that the shearing speed is 500-1800 r/min, then shearing at medium speed for 5-10min under the condition that the shearing speed is 1200-1800r/min, and finally shearing at high speed for 10-20min under the condition that the shearing speed is 2000-3000 r/min.
Preferably, the preparation process of the cationic emulsified asphalt comprises the following steps:
s1: firstly, putting petroleum asphalt into a hot melting machine, heating to 180-200 ℃ until the petroleum asphalt is completely melted, and then preparing hot water at 60-100 ℃;
s2: adding 60-100 ℃ hot water into a stirring tank, and then adding bentonite into the stirring tank;
s3: controlling the rotation speed of the stirring tank to be 120-140r/min, stirring for 5-10min, uniformly stirring, then adding 180-200 ℃ petroleum asphalt into the stirring tank, stirring while adding, stirring for 20-25min, uniformly stirring to form cation emulsified asphalt, and storing and packaging.
Preferably, the bentonite comprises montmorillonite, and the ratio of bentonite, water and petroleum asphalt is 1: 5: 5.
compared with the prior art, the invention has the beneficial effects that:
1. the polymer modified asphalt and the preparation method thereof have the advantages of good ductility, good elastic effect, no mildew after 11-15 years, excellent mildew resistance, long service life, low temperature resistance of-25 ℃ and high temperature resistance of 95 ℃.
2. The adding sequence of the propyl acid elastic emulsion, the anion emulsified asphalt and the cation emulsified asphalt in the polymer modified asphalt and the preparation method thereof is that the propyl acid elastic emulsion is firstly combined with the anion emulsified asphalt, and then the cation emulsified asphalt is added, so that the prepared polymer modified asphalt has ductility, and the combination of the propyl acid elastic emulsion and the cation emulsified asphalt can be quickly realized.
3. The polymer modified asphalt and the preparation method thereof are characterized in that a coupling agent, an accelerant and a compatilizer are added into a basic asphalt mixture, so that a cross-linking reaction is generated between polymer molecules and asphalt molecules, a relatively uniform net structure of the basic asphalt mixture is formed, the agglomeration of polymers is avoided, the low-temperature ductility and the storage stability of the modified asphalt are improved, ultrasonic dispersion and a high-speed shearing machine are combined, micelle with strong interaction in the basic asphalt can be opened under the ultrasonic action, the viscosity is effectively reduced, the dispersion effect of the polymers in the basic asphalt is improved, meanwhile, the aggregation of polymer particles can be prevented, and the full dispersion of the polymer particles is ensured.
4. The polymer modified asphalt and the preparation method thereof adopt low-speed, medium-speed and high-speed shearing processes for shearing in sequence, improve the dispersion effect of the polymer in the base asphalt, simultaneously can prevent the aggregation of polymer particles, ensure the full dispersion of the polymer particles, and improve the low-temperature ductility and the storage stability of the modified asphalt.
5. In the polymer modified asphalt and the preparation method thereof, the bentonite component is montmorillonite, and the proportion of the bentonite, water and petroleum asphalt is 1: 5: and 5, the montmorillonite structure is a 2:1 type crystal structure consisting of two silicon-oxygen tetrahedrons and a layer of aluminum-oxygen octahedrons, and the layered structure formed by montmorillonite unit cells has certain cations such as Cu, Mg, Na, K and the like, and the cations are unstable to the montmorillonite unit cells and are easy to exchange with other cations, so that the montmorillonite unit cells have better ion exchange property.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The polymer modified asphalt comprises the following raw materials in parts by weight:
acrylic acid elastic emulsion: 100 parts of (A);
anionic emulsified asphalt: 50 parts of a mixture;
cation emulsified asphalt: 50 parts of a mixture;
coupling agent: 8 parts of a mixture;
accelerator (b): 8 parts of a mixture;
a compatilizer: 16 parts of.
On the other hand, the invention also provides a preparation method of the polymer modified asphalt, which comprises the following steps:
s1: weighing the raw materials in parts by weight;
s2: uniformly mixing the weighed propyl acid elastic emulsion, the weighed anionic emulsified asphalt and the weighed cationic emulsified asphalt at the temperature of 250-270 ℃ while stirring and ultrasonically dispersing for 4-8min, wherein the ultrasonic frequency is 30-80KHz, so as to obtain a basic asphalt mixture;
s3: adding the weighed coupling agent, the accelerator and the compatilizer into the basic asphalt mixture obtained in the step S1, stirring and ultrasonically dispersing, and reacting at the temperature of 250-270 ℃ for 20-30min, wherein the ultrasonic frequency is 50-100 KHz;
s4: and shearing by using a high-speed shearing machine, and naturally cooling to room temperature to obtain the polymer modified asphalt.
Example 2
The polymer modified asphalt comprises the following raw materials in parts by weight:
acrylic acid elastic emulsion: 100 parts of (A);
anionic emulsified asphalt: 100 parts of (A);
cation emulsified asphalt: 100 parts of (A);
coupling agent: 10 parts of (A);
accelerator (b): 8 parts of a mixture;
a compatilizer: 15 parts.
On the other hand, the invention also provides a preparation method of the polymer modified asphalt, which comprises the following steps:
s1: weighing the raw materials in parts by weight;
s2: uniformly mixing the weighed propyl acid elastic emulsion, the weighed anionic emulsified asphalt and the weighed cationic emulsified asphalt at the temperature of 250-270 ℃ while stirring and ultrasonically dispersing for 4-8min, wherein the ultrasonic frequency is 30-80KHz, so as to obtain a basic asphalt mixture;
s3: adding the weighed coupling agent, the accelerator and the compatilizer into the basic asphalt mixture obtained in the step S1, stirring and ultrasonically dispersing, and reacting at the temperature of 250-270 ℃ for 20-30min, wherein the ultrasonic frequency is 50-100 KHz;
s4: and shearing by using a high-speed shearing machine, and naturally cooling to room temperature to obtain the polymer modified asphalt.
Example 3
The polymer modified asphalt comprises the following raw materials in parts by weight:
acrylic acid elastic emulsion: 200 parts of (A);
anionic emulsified asphalt: 100 parts of (A);
cation emulsified asphalt: 100 parts of (A);
coupling agent: 10 parts of (A);
accelerator (b): 10 parts of (A);
a compatilizer: and 20 parts.
On the other hand, the invention also provides a preparation method of the polymer modified asphalt, which comprises the following steps:
s1: weighing the raw materials in parts by weight;
s2: uniformly mixing the weighed propyl acid elastic emulsion, the weighed anionic emulsified asphalt and the weighed cationic emulsified asphalt at the temperature of 250-270 ℃ while stirring and ultrasonically dispersing for 4-8min, wherein the ultrasonic frequency is 30-80KHz, so as to obtain a basic asphalt mixture;
s3: adding the weighed coupling agent, the accelerator and the compatilizer into the basic asphalt mixture obtained in the step S1, stirring and ultrasonically dispersing, and reacting at the temperature of 250-270 ℃ for 20-30min, wherein the ultrasonic frequency is 50-100 KHz;
s4: and shearing by using a high-speed shearing machine, and naturally cooling to room temperature to obtain the polymer modified asphalt.
The polymer modified asphalt prepared in the above examples is compared with conventional asphalt in the following table:
as can be seen from the table, the polymer modified asphalt prepared by the polymer modified asphalt provided by the invention has the advantages of good ductility, good elastic effect, no mildew after 11-15 years, excellent mildew resistance, long service life, low temperature resistance of-25 ℃ and high temperature resistance of 95 ℃.
In the above three groups of embodiments, the coupling agent is an aminosilane coupling agent or a vinylsilane coupling agent, the aminosilane coupling agent is any one of N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, anilinomethyltrimethoxysilane, N-aminoethyl-3-aminopropylmethyldimethoxysilane, N-aminoethyl-3-aminopropyltriethoxysilane or 3-aminopropyltrimethoxysilane, and the vinylsilane coupling agent is any one of vinyltris (beta-methoxyethoxy) silane, vinyltrimethoxysilane, vinyltri-tert-butoxysilane, vinyltri-tert-butylperoxysilane or vinyltriacetoxysilane. The accelerator is any one of zinc diethyldithiocarbamate, zinc ethylphenyldithiocarbamate, dipentamethylenethiuram tetrasulfide, zinc 2-mercaptobenzothiazole or N-cyclohexyl-2-benzothiazolesulfenamide. The compatilizer is one or more of reduced-three-line extract oil, reduced-four-line extract oil and furfural extract oil. The coupling agent, the accelerator and the compatilizer are added into the basic asphalt mixture, so that the polymer molecules and the asphalt molecules are subjected to a crosslinking reaction to form a relatively uniform net structure of the basic asphalt mixture, the agglomeration of the polymer is avoided, the low-temperature ductility and the storage stability of the modified asphalt are improved, the ultrasonic dispersion and the high-speed shearing machine are combined, micelles with strong interaction in the basic asphalt can be opened under the ultrasonic action, the viscosity is effectively reduced, the dispersion effect of the polymer in the basic asphalt is improved, meanwhile, the aggregation of polymer particles can be prevented, and the sufficient dispersion of the polymer particles is ensured.
Specifically, the ratio of the acrylic acid elastic emulsion to the anionic emulsified asphalt to the cationic emulsified asphalt is 1: 1: 1 or 2: 1: 1. the addition sequence of the acrylic acid elastic emulsion, the anionic emulsified asphalt and the cationic emulsified asphalt is that firstly the acrylic acid elastic emulsion is combined with the anionic emulsified asphalt, and then the cationic emulsified asphalt is added, so that the prepared polymer modified asphalt has ductility, and the combination of the acrylic acid elastic emulsion and the cationic emulsified asphalt can be quickly realized.
In addition, the operation steps of the shearing treatment are specifically as follows: the speed of the high-speed shearing machine is controlled, low-speed shearing is carried out for 3-5min under the condition that the shearing speed is 500-1000r/min, then medium-speed shearing is carried out for 5-10min under the condition that the shearing speed is 1500-2000r/min, finally high-speed shearing is carried out for 10-20min under the condition that the shearing speed is 3000-4000r/min, and low-speed, medium-speed and high-speed shearing processes are sequentially adopted, so that the dispersing effect of the polymer in the base asphalt is improved, the aggregation of polymer particles can be prevented, the full dispersion of the polymer particles is ensured, and the low temperature ductility and the storage stability of the modified asphalt are improved.
The polymer modified asphalt and the preparation method thereof adopt the acrylic acid elastic emulsion as the copolymer of acrylic ester (such as n-butyl acrylate) and organic silicon, and the elastic emulsion has excellent rebound resilience, flexibility, adhesion, waterproofness, weather resistance, dust resistance, ultraviolet resistance and other performances. The elastic emulsion can be used for preparing elastic emulsion paint, elastic putty, elastic coating and the like. The elastic latex paint, the elastic putty and the like prepared by the elastic emulsion have excellent elasticity and elongation, can effectively cover the tiny cracks of the wall body, and play a good role in beautifying and protecting the wall body. The elastic emulsion takes water as a solvent, is non-toxic and harmless, is non-combustible and non-explosive, and is an environment-friendly product.
Example 4
As a fourth embodiment of the present invention, a process for preparing a cationic emulsified asphalt comprises the steps of:
s1: firstly, putting petroleum asphalt into a hot melting machine, heating to 180-200 ℃ until the petroleum asphalt is completely melted, and then preparing hot water at 60-100 ℃;
s2: adding 60-100 ℃ hot water into a stirring tank, and then adding bentonite into the stirring tank;
s3: controlling the rotation speed of the stirring tank to be 120-140r/min, stirring for 5-10min, uniformly stirring, then adding 180-200 ℃ petroleum asphalt into the stirring tank, stirring while adding, stirring for 20-25min, uniformly stirring to form cation emulsified asphalt, and storing and packaging.
Specifically, the petroleum asphalt adopts No. 70/90 asphalt, the bentonite comprises montmorillonite, and the proportion of bentonite, water and petroleum asphalt is 1: 5: and 5, the montmorillonite structure is a 2:1 type crystal structure consisting of two silicon-oxygen tetrahedrons and a layer of aluminum-oxygen octahedrons, and the layered structure formed by montmorillonite unit cells has certain cations such as Cu, Mg, Na, K and the like, and the cations are unstable to the montmorillonite unit cells and are easy to exchange with other cations, so that the montmorillonite unit cells have better ion exchange property.
In addition, the anionic emulsified asphalt is prepared by emulsifying No. 70 asphalt with anionic emulsifier with solid content of 50-55%.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A polymer modified asphalt characterized by: the feed comprises the following raw materials in parts by weight:
acrylic acid elastic emulsion: 100-200 parts;
anionic emulsified asphalt: 50-120 parts;
cation emulsified asphalt: 50-120 parts;
coupling agent: 5-10 parts;
accelerator (b): 5-10 parts;
a compatilizer: 15-20 parts.
2. The polymer modified asphalt of claim 1, wherein: the coupling agent is an aminosilane coupling agent or a vinylsilane coupling agent, the aminosilane coupling agent is any one of N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, anilinomethyltrimethoxysilane, N-aminoethyl-3-aminopropylmethyldimethoxysilane, N-aminoethyl-3-aminopropyltriethoxysilane or 3-aminopropyltrimethoxysilane, and the vinylsilane coupling agent is any one of vinyltris (beta-methoxyethoxy) silane, vinyltrimethoxysilane, vinyltri-tert-butoxysilane, vinyltri-tert-butylperoxysilane or vinyltriacetoxysilane.
3. The polymer modified asphalt of claim 1, wherein: the accelerator is any one of zinc diethyldithiocarbamate, zinc ethylphenyldithiocarbamate, dipentamethylenethiuram tetrasulfide, zinc 2-mercaptobenzothiazole or N-cyclohexyl-2-benzothiazolesulfenamide.
4. The polymer modified asphalt of claim 1, wherein: the compatilizer is one or more of reduced-trilinear extracted oil, reduced-trilinear extracted oil and furfural extracted oil.
5. The polymer modified asphalt of claim 1, wherein: the proportion of the acrylic acid elastic emulsion, the anionic emulsified asphalt and the cationic emulsified asphalt is 1: 1: 1 or 2: 1: 1.
6. a method for preparing polymer modified asphalt, comprising the polymer modified asphalt of any one of claims 1 to 5, the method specifically comprising the steps of:
s1: weighing the raw materials in parts by weight;
s2: uniformly mixing the weighed propyl acid elastic emulsion, the weighed anionic emulsified asphalt and the weighed cationic emulsified asphalt at the temperature of 250-270 ℃ while stirring and ultrasonically dispersing for 4-8min, wherein the ultrasonic frequency is 30-80KHz, so as to obtain a basic asphalt mixture;
s3: adding the weighed coupling agent, the accelerator and the compatilizer into the basic asphalt mixture obtained in the step S1, stirring and ultrasonically dispersing, and reacting at the temperature of 250-270 ℃ for 20-30min, wherein the ultrasonic frequency is 50-100 KHz;
s4: and shearing by using a high-speed shearing machine, and naturally cooling to room temperature to obtain the polymer modified asphalt.
7. The method for producing polymer-modified asphalt according to claim 6, characterized in that: the operation steps of the shearing treatment are as follows: controlling the speed of the high-speed shearing machine, shearing at low speed for 3-5min under the condition that the shearing speed is 500-1800 r/min, then shearing at medium speed for 5-10min under the condition that the shearing speed is 1200-1800r/min, and finally shearing at high speed for 10-20min under the condition that the shearing speed is 2000-3000 r/min.
8. The method for producing polymer-modified asphalt according to claim 6, characterized in that: the preparation process of the cationic emulsified asphalt comprises the following steps:
s1: firstly, putting petroleum asphalt into a hot melting machine, heating to 180-200 ℃ until the petroleum asphalt is completely melted, and then preparing hot water at 60-100 ℃;
s2: adding 60-100 ℃ hot water into a stirring tank, and then adding bentonite into the stirring tank;
s3: controlling the rotation speed of the stirring tank to be 120-140r/min, stirring for 5-10min, uniformly stirring, then adding 180-200 ℃ petroleum asphalt into the stirring tank, stirring while adding, stirring for 20-25min, uniformly stirring to form cation emulsified asphalt, and storing and packaging.
9. The method for producing polymer-modified asphalt according to claim 8, characterized in that: the bentonite comprises montmorillonite, and the proportion of bentonite, water and petroleum asphalt is 1: 5: 5.
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| US20160185966A1 (en) * | 2014-08-11 | 2016-06-30 | Research Institute Of Highway Ministry Of Transport | Waterborn polymer-modified emulsified asphalt mixture and process for producing the same |
| CN109575310A (en) * | 2018-11-20 | 2019-04-05 | 北京东方雨虹防水技术股份有限公司 | A kind of anionic emulsified modified asphalt and preparation method thereof and a kind of high binding type soluble asphalt water-repellent paint of anion |
| CN109897390A (en) * | 2019-03-01 | 2019-06-18 | 张莉 | A kind of polymer modified asphalt and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160185966A1 (en) * | 2014-08-11 | 2016-06-30 | Research Institute Of Highway Ministry Of Transport | Waterborn polymer-modified emulsified asphalt mixture and process for producing the same |
| CN109575310A (en) * | 2018-11-20 | 2019-04-05 | 北京东方雨虹防水技术股份有限公司 | A kind of anionic emulsified modified asphalt and preparation method thereof and a kind of high binding type soluble asphalt water-repellent paint of anion |
| CN109897390A (en) * | 2019-03-01 | 2019-06-18 | 张莉 | A kind of polymer modified asphalt and preparation method thereof |
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