CN115477923A - Thixotropic high-viscosity normal-temperature construction asphalt sealant and preparation method thereof - Google Patents
Thixotropic high-viscosity normal-temperature construction asphalt sealant and preparation method thereof Download PDFInfo
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- CN115477923A CN115477923A CN202211102552.4A CN202211102552A CN115477923A CN 115477923 A CN115477923 A CN 115477923A CN 202211102552 A CN202211102552 A CN 202211102552A CN 115477923 A CN115477923 A CN 115477923A
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- 239000010426 asphalt Substances 0.000 title claims abstract description 75
- 238000010276 construction Methods 0.000 title claims abstract description 62
- 239000000565 sealant Substances 0.000 title claims abstract description 42
- 230000009974 thixotropic effect Effects 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- 239000003208 petroleum Substances 0.000 claims abstract description 65
- 239000013008 thixotropic agent Substances 0.000 claims abstract description 40
- 239000002904 solvent Substances 0.000 claims abstract description 38
- 239000000835 fiber Substances 0.000 claims abstract description 26
- 229920005989 resin Polymers 0.000 claims abstract description 26
- 239000011347 resin Substances 0.000 claims abstract description 26
- 230000008719 thickening Effects 0.000 claims abstract description 19
- 239000000945 filler Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims description 100
- 239000000203 mixture Substances 0.000 claims description 47
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 27
- 238000010008 shearing Methods 0.000 claims description 27
- -1 alkyl ethoxy silane Chemical compound 0.000 claims description 19
- 239000003921 oil Substances 0.000 claims description 19
- 239000001856 Ethyl cellulose Substances 0.000 claims description 16
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 claims description 16
- 229920001249 ethyl cellulose Polymers 0.000 claims description 16
- 235000019325 ethyl cellulose Nutrition 0.000 claims description 16
- 239000000843 powder Substances 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 15
- 239000004743 Polypropylene Substances 0.000 claims description 14
- 229920001155 polypropylene Polymers 0.000 claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- 229920002678 cellulose Polymers 0.000 claims description 13
- 239000001913 cellulose Substances 0.000 claims description 13
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 12
- 239000007822 coupling agent Substances 0.000 claims description 12
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 12
- 239000010453 quartz Substances 0.000 claims description 12
- CRWNQZTZTZWPOF-UHFFFAOYSA-N 2-methyl-4-phenylpyridine Chemical compound C1=NC(C)=CC(C=2C=CC=CC=2)=C1 CRWNQZTZTZWPOF-UHFFFAOYSA-N 0.000 claims description 9
- 230000004048 modification Effects 0.000 claims description 9
- 238000012986 modification Methods 0.000 claims description 9
- XQQCQPDCGKGZFI-UHFFFAOYSA-N ethoxy(hexadecyl)silane Chemical group C(CCCCCCCCCCCCCCC)[SiH2]OCC XQQCQPDCGKGZFI-UHFFFAOYSA-N 0.000 claims description 8
- 239000004094 surface-active agent Substances 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical compound CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- KWIUHFFTVRNATP-UHFFFAOYSA-N Betaine Natural products C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 claims description 2
- KWIUHFFTVRNATP-UHFFFAOYSA-O N,N,N-trimethylglycinium Chemical group C[N+](C)(C)CC(O)=O KWIUHFFTVRNATP-UHFFFAOYSA-O 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 229960003237 betaine Drugs 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- 229920002301 cellulose acetate Polymers 0.000 claims description 2
- 230000018044 dehydration Effects 0.000 claims description 2
- 238000006297 dehydration reaction Methods 0.000 claims description 2
- 229920003063 hydroxymethyl cellulose Polymers 0.000 claims description 2
- 229940031574 hydroxymethyl cellulose Drugs 0.000 claims description 2
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 239000010456 wollastonite Substances 0.000 claims description 2
- 229910052882 wollastonite Inorganic materials 0.000 claims description 2
- 239000004566 building material Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 16
- 238000012360 testing method Methods 0.000 description 16
- 238000007789 sealing Methods 0.000 description 11
- 230000032683 aging Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 3
- 125000000524 functional group Chemical group 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 229910021485 fumed silica Inorganic materials 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 125000004469 siloxy group Chemical group [SiH3]O* 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- HECLRDQVFMWTQS-UHFFFAOYSA-N Dicyclopentadiene Chemical compound C1C2C3CC=CC3C1C=C2 HECLRDQVFMWTQS-UHFFFAOYSA-N 0.000 description 1
- 206010053615 Thermal burn Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 239000006184 cosolvent Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000693 micelle Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J195/00—Adhesives based on bituminous materials, e.g. asphalt, tar, pitch
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
-
- 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
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Sealing Material Composition (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention belongs to the technical field of building materials, and particularly relates to thixotropic high-bonding normal-temperature construction asphalt sealant and a preparation method thereof. The thixotropic high-bonding normal-temperature construction asphalt sealant comprises: petroleum asphalt, petroleum resin, wax, thickening thixotropic agent solution, fiber, filler and solvent oil. The thixotropic high-viscosity normal-temperature construction asphalt sealant disclosed by the invention has high thixotropy, can be constructed at normal temperature, is energy-saving and environment-friendly, reduces the manpower and material resources for construction, saves the construction cost and increases the construction efficiency.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to thixotropic high-bonding normal-temperature construction asphalt sealant and a preparation method thereof.
Background
At present in the sealed glue of pitch, sealant waterproof construction, sealed glue usually takes the hot melt construction through the heating back, and the flue gas is big, causes air pollution, causes the risk of scald to the operation personnel. When the sealing paste is in construction, the viscosity is high, so that the construction is difficult, the construction efficiency is low, the construction period is long, and a large amount of manpower and material resources are consumed; the workability of the aqueous sealant is excellent, but the volume of the aqueous sealant shrinks after construction; in order to facilitate construction, a large amount of solvent is often added to the solvent-based sealant, the viscosity is reduced, the solvent-based sealant is easy to flow and hang after construction, and cannot be applied to vertical face or vertical face construction. Such waterproof construction materials are liable to cause a decrease in waterproof function. Therefore, the performance of the asphalt waterproof sealing material needs to be further improved, and the asphalt waterproof sealing material has excellent weather resistance and thixotropy to meet the requirements of construction workability, construction efficiency increase, normal-temperature construction and long-term storage stability.
The thixotropic high-bonding normal-temperature construction asphalt sealant has obvious advantages in performance and practical application, and is mainly expressed as follows:
1) The excellent high-temperature and low-temperature performance ensures that the waterproof paint does not flow at high temperature and crack at low temperature, has excellent aging resistance, always maintains the self-service performance after construction, and ensures the sealing property and integrity of the whole waterproof system.
2) Excellent adhesive property and ensures the sealing property of the whole waterproof system.
3) The paint has excellent thixotropy, ensures good construction performance, does not flow or hang after construction, can reach the required thickness after one-time construction, can be used on a vertical surface or a vertical surface, and endows a system with good storage stability.
4) The construction at normal temperature does not need heating, can be used after the barrel is opened, saves energy, protects environment, reduces the manpower and material resources of construction and saves the construction cost.
Disclosure of Invention
The invention aims to solve the problems and provides the thixotropic normal-temperature construction asphalt sealant which has better construction performance, sealing performance and integrity of a waterproof system, can be used on a vertical surface or a vertical surface, and has the characteristics of no flowing, no sagging and the like.
In order to achieve the above object, a first aspect of the present invention provides a thixotropic high-adhesion normal temperature construction asphalt sealant, which comprises the following raw materials by weight:
28-38 parts of petroleum asphalt, 2-5 parts of petroleum resin, 2-5 parts of wax, 19-38 parts of thickening thixotropic agent solution, 0.2-1 part of fiber, 38-42 parts of filler and 8-12 parts of solvent oil;
the thixotropic agent solution is prepared by a method comprising the following steps:
dehydrating and drying cellulose, and then uniformly mixing the cellulose and a solvent to obtain a transparent solution; adding a coupling agent for modification, and then adding a surfactant for continuous modification to obtain the thixotropic agent solution.
In the thixotropic agent solution, a coupling agent is used for coupling with the cellulose and modifying the cellulose. According to the invention, preferably, alkyl ethoxy silane with two active groups is selected, more preferably, n-hexadecyl ethoxy silane is selected, and the two active groups of the coupling agent are respectively organic functional groups and inorganic siloxy functional groups. Wherein the organic functional groups are capable of dissolving in water and chemically reacting with a plurality of polymers; the inorganic siloxy functionality may then react with a number of minerals. The inorganic matter and the organic matter are combined through the two active groups to generate a molecular chain with an integrated structure. The disordered molecular chain of the ethyl cellulose is more stretched, and the thickening and thixotropic effects are achieved. Meanwhile, the addition of the coupling agent can further improve the fluidity.
In the sealing paste, petroleum resin and wax improve the high-temperature performance of the system; the thickening thixotropic agent solution has a thixotropic function, so that the viscosity of the system is reduced under high shear, the viscosity is kept in a certain viscosity range under low shear or without stirring, the aim of no flowing is achieved, and the cellulose in the thickening thixotropic agent solution has the effects of resisting aging and increasing the cohesiveness; the fibers serve to increase the mechanical properties of the system.
Preferably, the thixotropic high-viscosity normal-temperature construction asphalt sealant comprises 19-25 parts of thickened thixotropic agent solution.
Preferably, the cellulose is at least one selected from the group consisting of ethyl cellulose, hydroxymethyl cellulose and cellulose acetate. In a further preferred embodiment, the cellulose is ethyl cellulose.
Preferably, the solvent is at least one selected from white oil, ethanol, diethyl ether, diethylene glycol dibutyl ether, acetone, ethyl acetate and n-butyl acetate. As a further preferable scheme, the solvent is diethylene glycol dibutyl ether, and the solvent has a higher boiling point and a lower volatilization speed, and is a good solvent of ethyl cellulose, so that the whole oily system is better in compatibility and stability.
Preferably, the surfactant is betaine and/or glycerol. As a further preferable scheme, the surfactant in the thickened thixotropic agent solution is glycerol, and the viscosity is used as micelle solubilization to be a cosolvent, so that the whole oily asphalt system has better compatibility.
Preferably, the coupling agent is an alkyl ethoxy silane, and more preferably is n-hexadecyl ethoxy silane.
Preferably, the thixotropic agent solution is prepared by mixing, by weight,
solvent: cellulose: surfactant (b): coupling agent = 40-80.
Preferably, in the preparation method of the thixotropic agent solution, the temperature for dehydration and drying is 90-105 ℃ and the time is 10-20min.
As a preferable scheme, in the preparation method of the thixotropic agent solution, the temperature for adding the coupling agent for modification is 55-65 ℃ and the time is 5-15min.
Preferably, in the preparation method of the thixotropic agent solution, the temperature for continuous modification is 55-65 ℃ and the time is 5-15min.
Preferably, the petroleum asphalt is at least one selected from the group consisting of 70# petroleum asphalt, 90# petroleum asphalt and 110# petroleum asphalt.
Preferably, the petroleum resin is at least one selected from the group consisting of C9 petroleum resin, DCPD cycloaliphatic resin and hydrogenated petroleum resin.
Preferably, the wax is selected from at least one of fischer-tropsch wax, polypropylene wax and polyethylene wax.
Preferably, the fiber is at least one selected from polyacrylonitrile fiber, polyvinyl alcohol fiber and polypropylene fiber.
Preferably, the filler is at least one selected from quartz powder, heavy calcium carbonate and wollastonite powder.
Preferably, the solvent oil is S series solvent oil. As a further preferable scheme, the S series solvent oil is at least one selected from S-150, S-180 and S-200 environment-friendly solvent oils.
The second aspect of the present invention provides a preparation method of the thixotropic high-viscosity normal temperature construction asphalt sealant, wherein the preparation method comprises:
and uniformly stirring the melted petroleum asphalt, the petroleum resin, the wax, the thickening thixotropic agent solution, the filler, the solvent oil and the fiber to obtain the thixotropic high-bonding normal-temperature construction asphalt sealant.
As a preferred scheme, the preparation method of the thixotropic high-viscosity normal-temperature construction asphalt sealant comprises the following steps:
1) Heating in a low-shear stirring cylinder to melt the petroleum asphalt, keeping the temperature at 125-130 ℃, and uniformly stirring the petroleum asphalt;
2) Adding petroleum resin into petroleum asphalt, stirring at low speed, and maintaining at 130-140 deg.C;
3) Adding wax into the mixture obtained in the step 2), uniformly stirring at a low speed, and keeping the temperature at 140-150 ℃;
4) Adding the thickened thixotropic agent solution into the mixture obtained in the step 3), uniformly shearing and stirring at a high speed by using a high-speed shearing machine, and preserving heat at 150-160 ℃;
5) Adding a filler into the mixture obtained in the step 4), uniformly shearing and stirring at a high speed until no powder floats, and keeping the temperature at 90-100 ℃;
6) The high-speed shearing is changed into low-speed stirring, solvent oil is added into the mixture obtained in the step 5), the mixture is stirred uniformly, and the temperature is kept at 80-90 ℃;
7) Adding the fibers into the mixture obtained in the step 6), and continuing stirring until the petroleum asphalt and other materials are uniformly dispersed, so as to obtain the thixotropic high-bonding normal-temperature construction asphalt sealant.
The invention has the beneficial effects that:
1) The thixotropic high-viscosity normal-temperature construction asphalt sealant disclosed by the invention has high thixotropy, can be used for normal-temperature construction (heating is not needed, and the asphalt sealant can be used after being opened), is energy-saving and environment-friendly, reduces the manpower and material resources for construction, saves the construction cost, and increases the construction efficiency.
2) The sealing paste has excellent bonding strength, the bonding strength with a cement base surface reaches more than 0.8MPa, and the sealing paste has good bonding performance and ensures the sealing performance of the whole waterproof system.
3) The excellent high-temperature and low-temperature performance ensures that the waterproof paint does not flow at high temperature and crack at low temperature, has excellent aging resistance, always keeps self service performance after construction, and ensures the sealing property and integrity of the whole waterproof system.
4) After construction, the paint does not flow or hang, can reach the required thickness after one-time construction, can be used on a vertical surface or a vertical surface, and endows the system with good storage stability.
In conclusion, the product has high thixotropic property, so that the construction is more convenient, the construction efficiency is improved, the comprehensive cost of the engineering is reduced, and good economic benefit and social benefit are reflected.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
Fig. 1 is a schematic diagram showing the change of viscosity of the thixotropic normal temperature construction asphalt sealant according to the embodiment 1 of the present invention, which is caused by the change of the rotation speed.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In the examples of the present invention, the parts are parts by weight.
In the embodiment of the invention, the preparation method of the thickened thixotropic agent solution comprises the following steps: adding 14 parts of ethyl cellulose into a three-neck flask, dehydrating and drying at 90-105 ℃ for 15min, cooling to 60 ℃, adding 60 parts of diethylene glycol dibutyl ether, stirring until the ethyl cellulose is completely dissolved to form a transparent solution, adding 8 parts of n-hexadecyl ethoxysilane, modifying at 60 ℃ for 10min, adding 5 parts of glycerol, continuously modifying at 60 ℃ for 10min, cooling to room temperature, and discharging to obtain the thixotropic agent solution.
In the embodiment and the comparative example of the invention, the sources of the components are as follows: ethyl cellulose: manufactured by the Dow chemical (Shanghai) Co., ltd; other raw materials are common raw materials in laboratories.
Example 1:
heating 33 parts of No. 70 petroleum asphalt to 130 ℃, uniformly stirring at the stirring speed of 200rpm for 10 minutes, adding 2 parts of C9 petroleum resin into No. 70 petroleum asphalt, maintaining the temperature at 130 ℃, uniformly stirring at the shearing speed of 500rpm, and stirring for 10 minutes; adding 2 parts of polypropylene wax, continuously stirring for 20 minutes, and maintaining the temperature at 130 ℃; adding 25 parts of the prepared thickening thixotropic agent solution into the mixture, stirring for 60 minutes at a high shear equipment shear speed of 3000rpm, and maintaining the temperature at 150 ℃; adding 40 parts of 400-mesh quartz powder into the mixture, continuously shearing and dispersing for 10 minutes at a stirring speed of 1500rpm, and maintaining the temperature at 100 ℃; switching the high shear to a low-speed stirrer, adding 8 parts of S-150 solvent oil into the mixture, stirring at 1000rpm for 10 minutes, and maintaining the temperature at 90 ℃; 1 part of polyvinyl alcohol fiber was added and stirring was continued for 10 minutes. And finishing sample preparation and testing performance.
Fig. 1 shows a schematic diagram of the viscosity change of the thixotropic normal temperature construction asphalt sealant according to example 1 of the present invention, which is caused by the change of the rotation speed.
Example 2:
Example 3:
heating 35 parts of No. 70 petroleum asphalt to 130 ℃, uniformly stirring at the stirring speed of 200rpm for 10 minutes, adding 2 parts of C9 petroleum resin into No. 70 petroleum asphalt, maintaining the temperature at 130 ℃, uniformly stirring at the shearing speed of 500rpm, and stirring for 10 minutes; adding 2 parts of polypropylene wax, continuously stirring for 20 minutes, and maintaining the temperature at 130 ℃; adding 38 parts of the prepared thickening thixotropic agent solution into the mixture, stirring for 60 minutes at a shearing speed of 3000rpm by using high-shear equipment, and maintaining the temperature at 150 ℃; adding 40 parts of 400-mesh quartz powder into the mixture, continuously shearing and dispersing for 10 minutes at a stirring speed of 1500rpm, and maintaining the temperature at 100 ℃; switching the high shear to a low-speed stirrer, adding 8 parts of S-150 solvent oil into the mixture, stirring at 1000rpm for 10 minutes, and maintaining the temperature at 90 ℃; 1 part of polyvinyl alcohol fiber was added and stirring was continued for 10 minutes. And (5) finishing sample preparation and testing performance.
Example 4:
heating 31 parts of No. 90 petroleum asphalt to 130 ℃, uniformly stirring at the stirring speed of 200rpm for 10 minutes, adding 3 parts of C9 petroleum resin into No. 90 petroleum asphalt, maintaining the temperature at 130 ℃, uniformly stirring at the shearing speed of 500rpm, and stirring for 10 minutes; adding 2 parts of polypropylene wax, continuously stirring for 20 minutes, and maintaining the temperature at 130 ℃; adding 31 parts of the prepared thickening thixotropic agent solution into the mixture, stirring for 60 minutes at a high shear equipment shear speed of 3000rpm, and maintaining the temperature at 150 ℃; adding 41 parts of 400-mesh quartz powder into the mixture, continuously shearing for 10 minutes, stirring at 1500rpm, and maintaining the temperature at 100 ℃; switching the high shear to a low-speed stirrer, adding 10 parts of S-150 solvent oil into the mixture, stirring at 1000rpm for 10 minutes, and maintaining the temperature at 90 ℃; 1 part of polyvinyl alcohol fiber was added and stirring was continued for 10 minutes. And finishing sample preparation and testing performance.
Comparative example 1:
this comparative example differs from example 1 in that: no thickening thixotropic agent solution was added to the formulation.
Heating 33 parts of No. 70 petroleum asphalt to 130 ℃, uniformly stirring, adding 2 parts of C9 petroleum resin into No. 70 petroleum asphalt, maintaining the temperature at 130 ℃, uniformly stirring, and stirring for 10 minutes at a shearing speed of 500 rpm; adding 2 parts of polypropylene wax, continuously stirring for 20 minutes, and maintaining the temperature at 130 ℃; adding 40 parts of 400-mesh quartz powder into the mixture, continuously shearing and dispersing for 10 minutes, stirring at the speed of 1500rpm, and maintaining the temperature at 100 ℃; switching the high shear to a low-speed stirrer, adding 8 parts of S-150 solvent oil into the mixture, stirring at 1000rpm for 10 minutes, and maintaining the temperature at 90 ℃; 1 part of polyvinyl alcohol fiber was added and stirring was continued for 10 minutes. And (5) finishing sample preparation and testing performance.
Comparative example 2:
the comparative example differs from example 2 in that: no thickening thixotropic agent solution was added to the formulation.
Comparative example 3: this comparative example is similar to example 1, except that: replacing the thickening thixotropic agent solution with the same amount of the thixotropic agent fumed silica.
Heating 33 parts of No. 70 petroleum asphalt to 130 ℃, stirring at the speed of 200rpm for 10 minutes, adding 2 parts of C9 petroleum resin into No. 70 petroleum asphalt, maintaining the temperature at 130 ℃, uniformly stirring, and stirring at the shear speed of 500rpm for 10 minutes; adding 2 parts of polypropylene wax, continuously stirring for 20 minutes, and maintaining the temperature at 130 ℃; adding 25 parts of fumed silica into the mixture, stirring for 60 minutes at a shearing speed of 3000rpm by using high-shear equipment, and maintaining the temperature at 150 ℃; adding 40 parts of 400-mesh quartz powder into the mixture, continuously shearing and dispersing for 10 minutes, stirring at the speed of 1500rpm, and maintaining the temperature at 100 ℃; switching the high shear to a low-speed stirrer, adding 8 parts of S-150 solvent oil into the mixture, stirring at 1000rpm for 10 minutes, and maintaining the temperature at 90 ℃; 1 part of polyvinyl alcohol fiber was added and stirring was continued for 10 minutes. And finishing sample preparation and testing performance.
Comparative example 4: this comparative example is similar to example 1, except that: an equal amount of the thickened thixotropic agent solution was replaced with an equal amount of the thixotropic agent organobentonite.
Heating 33 parts of No. 70 petroleum asphalt to 130 ℃, stirring at the speed of 200rpm for 10 minutes, adding 2 parts of C9 petroleum resin into No. 70 petroleum asphalt, maintaining the temperature at 130 ℃, uniformly stirring, and stirring at the shear speed of 500rpm for 10 minutes; adding 2 parts of polypropylene wax, continuously stirring for 20 minutes, and maintaining the temperature at 130 ℃; adding 25 parts of organic bentonite into the mixture, stirring for 60 minutes at a shearing speed of 3000rpm by using high-shear equipment, and maintaining the temperature at 150 ℃; adding 40 parts of 400-mesh quartz powder into the mixture, continuously shearing and dispersing for 10 minutes, stirring at the speed of 1500rpm, and maintaining the temperature at 100 ℃; transferring the high shear into a low-speed stirrer, adding 8 parts of S-150 solvent oil into the mixture, stirring at the speed of 1000rpm, continuing stirring for 10 minutes, and maintaining the temperature at 90 ℃; 1 part of polyvinyl alcohol fiber was added and stirring was continued for 10 minutes. And finishing sample preparation and testing performance.
Comparative example 5: this comparative example is similar to example 1, except that: the thickening thixotropic agent is not prepared beforehand, but the raw materials are added directly to the mixture.
Heating 33 parts of No. 70 petroleum asphalt to 130 ℃, stirring at the speed of 200rpm for 10 minutes, adding 2 parts of C9 petroleum resin into No. 70 petroleum asphalt, maintaining the temperature at 130 ℃, uniformly stirring, and stirring at the shear speed of 500rpm for 10 minutes; adding 2 parts of polypropylene wax, continuously stirring for 20 minutes, and maintaining the temperature at 130 ℃; adding a mixture of 25 parts of ethyl cellulose, diethylene glycol dibutyl ether, n-hexadecyl ethoxy silane and glycerol into the mixture, wherein the mass ratio of the ethyl cellulose to the diethylene glycol dibutyl ether to the n-hexadecyl ethoxy silane to the glycerol is (14); adding 40 parts of 400-mesh quartz powder into the mixture, continuously shearing and dispersing for 10 minutes at a stirring speed of 1500rpm, and maintaining the temperature at 100 ℃; transferring the high shear into a low-speed stirrer, adding 8 parts of S-150 solvent oil into the mixture, stirring at the speed of 1000rpm, continuing stirring for 10 minutes, and maintaining the temperature at 90 ℃; 1 part of polyvinyl alcohol fiber was added and stirring was continued for 10 minutes. And finishing sample preparation and testing performance.
Comparative example 6: this comparative example is similar to example 2, except that: the thickening thixotropic agent is not prepared beforehand, but the raw materials are added directly to the mixture.
Test example:
this test was carried out on the asphalt sealants of examples 1 to 4 and comparative examples 1 to 6 according to the method prescribed in the specification of JC/T2428-2017, JC/T408-2005, GB/T10120-2013, GB/T16777-2008 for viscosity measurement with reference to GB/T2794-1995 "measurement of adhesive viscosity" and rotational viscometer. The thixotropy value is expressed by the ratio of the viscosity at the rotating speed of 6r/min and the viscosity at the rotating speed of 60r/min, the higher the thixotropy value is, the better the thixotropy of the material is, and the detection results are shown in the following table:
table 1 sealant viscosity and thixotropic index test
The test results for the sealant are shown in table 2 below, and the thixotropic time is the time at which the viscosity of the sealant increases by a factor of 4.
Table 2 sealant viscosity and thixotropic time testing
As can be seen from the test results in tables 1 and 2, the sealing paste of the present invention has high viscosity measured at low rotation speed, and has large viscosity reduction amplitude after the rotation speed is increased, and high thixotropic index; meanwhile, the sealing paste has longer operation time and is convenient to construct. In contrast, when the thixotropic agent is omitted, both low viscosity and thixotropy cannot be achieved at the same time.
TABLE 3 conventional Performance test of sealants
The above examples 1 and 2 are preferred embodiments of the present invention. As can be seen from tables 1, 2, and 3, each of the detection indexes of examples 1 and 2 can satisfy the index requirements, and both exhibit high thixotropy. Example 1 has a higher thixotropic index than example 2 because the amount of ethylcellulose added is more suitable for this system, making example 1 exhibit better thixotropic properties than example 2. The addition of ethyl cellulose improves the high-temperature, low-temperature and ageing-resistant performances of the system, so that the sealant has excellent adhesive property. In comparative examples 1 and 2, because no ethyl cellulose is added, low viscosity cannot be realized, so that the system has no thixotropy, poor high and low temperature and aging resistance and low bonding strength.
In examples 3 and 4, the amount of the thickening thixotropic agent added is more than that in example 1, so that molecular chains of the thixotropic agent are not all arranged orderly parallel to the flow direction when the product is stirred, and a part of molecular chains are still in a disordered state, so that the viscosity of the system is obviously not reduced by comparative example 1, and the effects of examples 3 and 4 are general compared with those of examples 1 and 2.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. The thixotropic high-bonding normal-temperature construction asphalt sealant is characterized by comprising the following raw materials in parts by weight:
28-38 parts of petroleum asphalt, 2-5 parts of petroleum resin, 2-5 parts of wax, 19-38 parts of thickening thixotropic agent solution, 0.2-1 part of fiber, 38-42 parts of filler and 8-12 parts of solvent oil;
the thixotropic agent solution is prepared by a method comprising the following steps:
dehydrating and drying cellulose, and then uniformly mixing the cellulose and a solvent to obtain a transparent solution; adding a coupling agent for modification, and then adding a surfactant for continuous modification to obtain the thixotropic agent solution.
2. The thixotropic high-bonding ambient temperature construction asphalt sealant according to claim 1,
and 19-25 parts of thickened thixotropic agent solution.
3. The thixotropic high-adhesion ambient temperature construction asphalt sealant according to claim 1,
the cellulose is at least one selected from ethyl cellulose, hydroxymethyl cellulose and cellulose acetate;
the solvent is at least one of white oil, ethanol, diethyl ether, diethylene glycol dibutyl ether, acetone, ethyl acetate and n-butyl acetate;
the surfactant is betaine and/or glycerol;
the coupling agent is alkyl ethoxy silane.
4. The thixotropic high-bonding ambient temperature construction asphalt sealant according to claim 3,
the cellulose is ethyl cellulose;
the solvent is diethylene glycol dibutyl ether;
the surfactant is glycerol;
the coupling agent is n-hexadecyl ethoxy silane.
5. The thixotropic high-bonding normal temperature construction asphalt sealant according to claim 1, wherein, in the raw material composition of the thixotropic agent solution by weight,
solvent: cellulose: surfactant (b): coupling agent = 40-80.
6. The thixotropic high-bonding normal temperature construction asphalt sealant according to claim 1, wherein in the preparation method of the thixotropic agent solution,
the temperature of dehydration and drying is 90-105 ℃, and the time is 10-20min;
adding a coupling agent for modification at the temperature of 55-65 ℃ for 5-15min;
the temperature for continuous modification is 55-65 ℃ and the time is 5-15min.
7. The thixotropic high-bonding ambient temperature construction asphalt sealant according to claim 1,
the petroleum asphalt is selected from at least one of 70# petroleum asphalt, 90# petroleum asphalt and 110# petroleum asphalt;
the petroleum resin is at least one of C9 petroleum resin, DCPD alicyclic resin and hydrogenated petroleum resin;
the wax is selected from at least one of Fischer-Tropsch wax, polypropylene wax and polyethylene wax;
the fiber is selected from at least one of polyacrylonitrile fiber, polyvinyl alcohol fiber and polypropylene fiber;
the filler is selected from at least one of quartz powder, heavy calcium carbonate and wollastonite powder;
the solvent oil is S series solvent oil.
8. The thixotropic high-tack ambient temperature construction asphalt sealant according to claim 7, wherein,
the S series solvent oil is at least one selected from S-150, S-180 and S-200 environment-friendly solvent oil.
9. The preparation method of the thixotropic high-bonding normal temperature construction asphalt sealant as claimed in any one of claims 1 to 8, characterized in that the preparation method comprises the following steps:
and uniformly stirring the melted petroleum asphalt, the petroleum resin, the wax, the thickening thixotropic agent solution, the filler, the solvent oil and the fiber to obtain the thixotropic high-bonding normal-temperature construction asphalt sealant.
10. The preparation method of the thixotropic high-bonding normal-temperature construction asphalt sealant according to claim 9, which comprises the following steps:
1) Heating in a low-shear mixing tank to melt petroleum asphalt, keeping the temperature at 125-130 ℃, and uniformly mixing the petroleum asphalt;
2) Adding petroleum resin into petroleum asphalt, stirring at low speed, and maintaining at 130-140 deg.C;
3) Adding wax into the mixture obtained in the step 2), uniformly stirring at a low speed, and keeping the temperature at 140-150 ℃;
4) Adding the thickening thixotropic agent solution into the mixture obtained in the step 3), uniformly shearing and stirring at a high speed by using a high-speed shearing machine, and preserving heat at 150-160 ℃;
5) Adding a filler into the mixture obtained in the step 4), uniformly shearing and stirring at a high speed until no powder floats, and keeping the temperature at 90-100 ℃;
6) The high-speed shearing is changed into low-speed stirring, solvent oil is added into the mixture obtained in the step 5), the mixture is stirred uniformly, and the temperature is kept at 80-90 ℃;
7) Adding the fibers into the mixture obtained in the step 6), and continuing stirring until the petroleum asphalt and other materials are uniformly dispersed, so as to obtain the thixotropic high-bonding normal-temperature construction asphalt sealant.
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