CN112708397B - Maleic anhydride grafted bimodal polyethylene modified asphalt waterproof adhesive layer, waterproof material and preparation method of waterproof material - Google Patents

Maleic anhydride grafted bimodal polyethylene modified asphalt waterproof adhesive layer, waterproof material and preparation method of waterproof material Download PDF

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Publication number
CN112708397B
CN112708397B CN202011543291.0A CN202011543291A CN112708397B CN 112708397 B CN112708397 B CN 112708397B CN 202011543291 A CN202011543291 A CN 202011543291A CN 112708397 B CN112708397 B CN 112708397B
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maleic anhydride
bimodal polyethylene
anhydride grafted
modified asphalt
asphalt waterproof
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CN112708397A (en
Inventor
郭勇
李藏哲
张晓慧
陈少静
柳海燕
张国珍
曹轶
郑檩
苏永华
葛凯
班新林
王乐然
石龙
赵体波
牛斌
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Hengshui Zhongyu Tiexin Waterproof Technology Co ltd
Railway Engineering Research Institute of CARS
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Hengshui Zhongyu Tiexin Waterproof Technology Co ltd
Railway Engineering Research Institute of CARS
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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
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • 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
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • 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
    • 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
    • C09J2400/00—Presence of inorganic and organic materials
    • C09J2400/10—Presence of inorganic materials

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  • Engineering & Computer Science (AREA)
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Abstract

The invention provides a maleic anhydride grafted bimodal polyethylene modified asphalt waterproof adhesive layer, a waterproof material and a preparation method thereof, wherein the preparation raw materials of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof adhesive layer comprise the following components: asphalt, a rubber modifier, bimodal polyethylene, maleic anhydride and a grafting agent. Preferably, the preparation raw materials comprise the following components in parts by weight: 30-48 parts of asphalt, 8-12 parts of rubber modifier, 20-25 parts of bimodal polyethylene, 5-10 parts of maleic anhydride and 0.5-1 part of grafting agent. According to the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer, the maleic anhydride grafted bimodal polyethylene is used for reinforcing and modifying asphalt, the physical mechanical property of the modified asphalt is improved, the anti-aging performance and the weather resistance of the material are improved, the dependence of an asphalt layer on a base is eliminated, the tensile strength of the asphalt waterproof material is improved, and the overall cost and the transportation cost of the material are reduced.

Description

Maleic anhydride grafted bimodal polyethylene modified asphalt waterproof adhesive layer, waterproof material and preparation method thereof
Technical Field
The invention belongs to the technical field of waterproof materials, and particularly relates to a maleic anhydride grafted bimodal polyethylene modified asphalt waterproof adhesive layer, a waterproof material and a preparation method thereof.
Background
Modified asphalt waterproofing materials generally consist of three parts: the polyester felt, the glass fiber felt or the glass fiber reinforced polyester felt is used as a base to provide strong support for the coiled material; the thermoplastic elastomer SBS (styrene-butadiene-styrene block copolymer modified asphalt) is used as a dip coating to provide the waterproof performance of the coiled material; polyethylene film, fine sand, mineral aggregate are as the isolation layer of different materials, provide different protection effects for the coiled material. The base is mainly divided into polyester felt (PY), fiberglass felt (G) and glass fiber reinforced polyester felt (PYG), and because the strength of the modified asphalt layer is low, the base must rely on the carcass to provide higher strength. But has four disadvantages: firstly, the base is a filament polyester felt, so that the elongation is relatively low, and the elongation performance of the whole material is influenced; secondly, the material is thicker, which causes certain difficulty for construction; thirdly, the polyester tire base has a cavity, so that the quality of the material is increased after the material is soaked in water easily, and the waterproof effect is influenced; fourthly, the overall material cost and the transportation cost are high.
Therefore, the asphalt layer needs to be modified to improve the mechanical strength and the processing performance thereof, and the asphalt layer is free from the dependence on the base so as to improve the tensile strength of the asphalt waterproof material.
Disclosure of Invention
The invention solves the technical problem of providing a maleic anhydride grafted bimodal polyethylene modified asphalt waterproof adhesive layer, a waterproof material and a preparation method thereof, wherein maleic anhydride grafted bimodal polyethylene is used for enhancing and modifying asphalt, so that the physical and mechanical properties of the modified asphalt are improved, the anti-aging performance and the weather resistance of the material are improved, the dependence of an asphalt layer on a tire base is eliminated, the tensile strength of the asphalt waterproof material is improved, and the overall cost and the transportation cost of the material are reduced.
In order to solve the above problems, one aspect of the present invention provides a maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer, which is prepared from the following raw materials:
asphalt, a rubber modifier, bimodal polyethylene, maleic anhydride and a grafting agent.
Preferably, the preparation raw materials comprise the following components in parts by weight: 30-48 parts of asphalt, 8-12 parts of rubber modifier, 20-25 parts of bimodal polyethylene, 5-10 parts of maleic anhydride and 0.5-1 part of grafting agent.
The bimodal polyethylene is polyethylene resin with a molecular weight distribution curve showing two peak values, the molecular weight distribution of common polyethylene only has one peak, and compared with the common polyethylene, the bimodal polyethylene has excellent physical and mechanical strength and excellent processing performance and is used for improving the tensile strength of the modified asphalt, and the bimodal polyethylene is preferably a product with the type 7000F of Yanshan petrochemical company.
Preferably, the asphalt is petroleum asphalt.
Preferably, the asphalt is a mixture of asphalt No. 10 and asphalt No. 100.
Further preferably, the asphalt is a mixture of No. 10 asphalt and No. 100 asphalt in a mass ratio of 3: 1.
Preferably, the rubber modifier is SEBS.
SEBS is a linear triblock copolymer with polystyrene as a terminal segment and an ethylene-butylene copolymer obtained by hydrogenation of polybutadiene as a middle elastic block. SEBS does not contain unsaturated double bonds, so the SEBS has good stability and aging resistance.
Further preferably, the SEBS is a material with a styrene content of 30-33%.
Further preferably, the SEBS is a product manufactured by Kraton corporation of Keteng, USA model No. G1651 or G1654.
Preferably, the purity of the maleic anhydride is more than or equal to 99%.
Preferably, the grafting agent is dicumyl peroxide. Dicumyl peroxide (also called vulcanizing agent DCP, dicumyl peroxide) with molecular formula C 18 H 22 O 2 The catalyst is a strong oxidant, can be used as an initiator for monomer polymerization, and is used for grafting the maleic anhydride to the bimodal polyethylene.
In another aspect of the present invention, a method for preparing the above maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer is provided, which comprises the following steps:
s1, mixing and stirring bimodal polyethylene, maleic anhydride and a grafting agent to obtain maleic anhydride grafted bimodal polyethylene;
s2, mixing asphalt, a rubber modifier and maleic anhydride grafted bimodal polyethylene, and stirring to obtain a mixture;
and S3, carrying out forced feeding, mixing, shearing and extrusion molding on the mixture to obtain the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof adhesive layer.
Specifically, the method for preparing the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer comprises the following steps:
s1, adding bimodal polyethylene, maleic anhydride and a grafting agent into a high-speed dispersion machine, stirring at a high speed for 5min, then stirring at a low speed for 2min to obtain maleic anhydride grafted bimodal polyethylene, and canning for use;
s2, heating the asphalt to 80-100 ℃, adding the rubber modifier and the maleic anhydride grafted bimodal polyethylene while stirring, and stirring for 3-5min to obtain a mixture;
s3, forcibly feeding the mixture to a feed inlet of a double-screw extruder by using a rotating screw, extruding and shearing the mixture in the double screws, adjusting the rotating speed to 35-45Hz, then carrying out double-roller extrusion forming on the mixture, adjusting the gap between forming rollers to control the thickness of the high-strength modified asphalt glue layer to be 1.5-2.0mm, and obtaining the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer.
Preferably, in step S1, the grafting ratio of the maleic anhydride grafted bimodal polyethylene is 1.5% -3%. Experimental research shows that when the grafting ratio of the maleic anhydride grafted bimodal polyethylene is 1.5-3%, the tensile strength of the modified asphalt can be improved, and the compatibility of the bimodal polyethylene and the asphalt can be improved.
The maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material comprises the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof adhesive layer, wherein a diamond sand layer is arranged on the upper surface of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof adhesive layer in a fit mode, an isolation layer is arranged on the lower surface of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof adhesive layer, and the isolation layer is a release film or release paper.
Preferably, the thickness of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer is 1.5-2.0 mm; the thickness of the carborundum layer is 0.01-0.012 mm; the thickness of the isolation layer is 0.03-0.04 mm.
In another aspect of the present invention, a method for preparing the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material comprises the following steps:
covering an isolating film or isolating paper on one surface of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer, and scattering carborundum on the other surface of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer to obtain the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material.
Wherein the carborundum, also called silicon carbide, is an inorganic substance, is prepared by smelting quartz sand, petroleum coke, wood chips and other raw materials in a resistance furnace at high temperature, is hexagonal crystal, and has the specific gravity of 3.20-3.25g/cm 3 The microhardness is 2840-3320kg/mm 2 Preferably 50-60 meshThe diamond grains are made into a diamond layer.
Compared with the prior art, the invention has the following beneficial effects:
the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer adopts a chemical asphalt modification method, utilizes maleic anhydride grafted bimodal polyethylene to modify asphalt, firstly carries out grafting reaction on maleic anhydride and bimodal polyethylene to obtain maleic anhydride grafted bimodal polyethylene, and then adopts maleic anhydride grafted bimodal polyethylene and a rubber modifier to modify an asphalt matrix, wherein a molecular weight distribution curve of the bimodal polyethylene presents two peak values, so that the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer has excellent physical and mechanical strength and excellent processing performance, can obviously improve the tensile strength of modified asphalt, and gets rid of dependence of materials on a base; the rubber modifier is SEBS which is a linear triblock copolymer with polystyrene as a terminal segment and an ethylene-butylene copolymer obtained by hydrogenation of polybutadiene as a middle elastic block, does not contain unsaturated double bonds and has good stability and aging resistance. The maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer obtained after modification has excellent physical mechanical property, excellent processing property, excellent ageing resistance and weather resistance, gets rid of dependence of materials on a tyre base, and simultaneously reduces the overall cost and transportation cost of the materials.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood 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 obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In each of the following examples, SEBS was obtained from Kraton, Inc. of U.S. under the type G1651; bimodal polyethylene was purchased from Yanshan petrochemical company under the model 7000F.
Example 1
The maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material comprises a diamond sand layer, a maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer and an isolation layer, wherein the diamond sand layer, the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer and the isolation layer are sequentially attached to each other, and the isolation layer is a release film. Wherein the thickness of the carborundum layer is 0.01 mm; the thickness of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer is 1.8 mm; the thickness of the isolation layer is 0.03 mm.
The preparation raw materials of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer comprise the following components in parts by mass: 10 parts of No. 10 asphalt, 30 parts of No. 100 asphalt, 10 parts of rubber modifier SEBS, 20 parts of bimodal polyethylene, 5 parts of maleic anhydride and 0.5 part of grafting agent dicumyl peroxide.
The preparation method of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material comprises the following steps:
s1, adding bimodal polyethylene, maleic anhydride and a grafting agent into a high-speed dispersion machine according to the selected mass parts, stirring at a high speed for 5min, then stirring at a low speed for 2min to obtain maleic anhydride grafted bimodal polyethylene, and canning for later use;
s2, heating the asphalt to 90 ℃, adding the rubber modifier and the maleic anhydride grafted bimodal polyethylene while stirring, and stirring for 3-5min to obtain a mixture;
s3, forcibly feeding the mixture to a feed inlet of a double-screw extruder by using a rotating screw, extruding and shearing the mixture in the double screws, adjusting the rotating speed to 35-45Hz, then carrying out double-roller extrusion forming on the mixture, adjusting the gap between forming rollers to control the thickness of a high-strength modified asphalt glue layer to be 1.8mm, and obtaining a maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer;
and S4, covering an isolation film on one surface of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof adhesive layer, and scattering carborundum on the other surface of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof adhesive layer to obtain the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material.
Example 2
The maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material comprises a diamond sand layer, a maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer and an isolation layer, wherein the diamond sand layer, the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer and the isolation layer are sequentially attached to each other, and the isolation layer is a release film. Wherein the thickness of the carborundum layer is 0.01 mm; the thickness of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer is 1.8 mm; the thickness of the isolation layer is 0.03 mm.
The maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer comprises the following raw materials in parts by mass: 11 parts of No. 10 asphalt, 33 parts of No. 100 asphalt, 10 parts of rubber modifier SEBS, 22 parts of bimodal polyethylene, 6 parts of maleic anhydride and 0.4 part of grafting agent dicumyl peroxide.
The preparation method of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material comprises the following steps:
s1, adding bimodal polyethylene, maleic anhydride and a grafting agent into a high-speed dispersion machine according to the selected mass parts, stirring at a high speed for 5min, then stirring at a low speed for 2min to obtain maleic anhydride grafted bimodal polyethylene, and canning for use;
s2, heating the asphalt to 90 ℃, adding the rubber modifier and the maleic anhydride grafted bimodal polyethylene while stirring, and stirring for 3-5min to obtain a mixture;
s3, forcibly feeding the mixture to a feed inlet of a double-screw extruder by using a rotating screw, extruding and shearing the mixture in the double screws, adjusting the rotating speed to 35-45Hz, then carrying out double-roller extrusion forming on the mixture, adjusting the gap between forming rollers to control the thickness of a high-strength modified asphalt glue layer to be 1.8mm, and obtaining a maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer;
and S4, covering an isolation film on one surface of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof adhesive layer, and scattering carborundum on the other surface of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof adhesive layer to obtain the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material.
Example 3
The maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material comprises a diamond sand layer, a maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer and an isolation layer, wherein the diamond sand layer, the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer and the isolation layer are sequentially attached to each other, and the isolation layer is a release film. Wherein, the thickness of the carborundum layer is 0.012 mm; the thickness of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer is 1.8 mm; the thickness of the isolation layer is 0.04 mm.
The preparation raw materials of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer comprise the following components in parts by mass: 12 parts of No. 10 asphalt, 36 parts of No. 100 asphalt, 9 parts of rubber modifier SEBS, 24 parts of bimodal polyethylene, 9 parts of maleic anhydride and 0.5 part of grafting agent dicumyl peroxide.
The preparation method of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material comprises the following steps:
s1, adding bimodal polyethylene, maleic anhydride and a grafting agent into a high-speed dispersion machine according to the selected mass parts, stirring at a high speed for 5min, then stirring at a low speed for 2min to obtain maleic anhydride grafted bimodal polyethylene, and canning for later use;
s2, heating the asphalt to 90 ℃, adding the rubber modifier and the maleic anhydride grafted bimodal polyethylene while stirring, and stirring for 3-5min to obtain a mixture;
s3, forcibly feeding the mixture to a feed inlet of a double-screw extruder by using a rotating screw, extruding and shearing the mixture in the double screws, adjusting the rotating speed to 35-45Hz, then carrying out double-roller extrusion forming on the mixture, adjusting the gap between forming rollers to control the thickness of a high-strength modified asphalt glue layer to be 1.8mm, and obtaining a maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer;
and S4, covering an isolation film on one surface of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof adhesive layer, and scattering carborundum on the other surface of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof adhesive layer to obtain the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material.
Example 4
The maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material comprises a diamond sand layer, a maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer and an isolation layer, wherein the diamond sand layer, the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer and the isolation layer are sequentially attached to each other, and the isolation layer is a release film. Wherein, the thickness of the carborundum layer is 0.012 mm; the thickness of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer is 1.8 mm; the thickness of the isolation layer is 0.04 mm.
The maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer comprises the following raw materials in parts by mass: 10 parts of No. 10 asphalt, 30 parts of No. 100 asphalt, 10 parts of rubber modifier SEBS, 23 parts of bimodal polyethylene, 6 parts of maleic anhydride and 0.8 part of grafting agent dicumyl peroxide.
The preparation method of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material comprises the following steps:
s1, adding bimodal polyethylene, maleic anhydride and a grafting agent into a high-speed dispersion machine according to the selected mass parts, stirring at a high speed for 5min, then stirring at a low speed for 2min to obtain maleic anhydride grafted bimodal polyethylene, and canning for later use;
s2, heating the asphalt to 90 ℃, adding the rubber modifier and the maleic anhydride grafted bimodal polyethylene while stirring, and stirring for 3-5min to obtain a mixture;
s3, feeding the mixture into a feed inlet of a double-screw extruder by a rotating screw in a forced manner, extruding and shearing the mixture in the double screws, adjusting the rotating speed to 35-45Hz, then carrying out double-roller extrusion molding on the mixture, adjusting the gap between molding rollers to control the thickness of a high-strength modified asphalt glue layer to be 1.8mm, and obtaining a maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer;
and S4, covering an isolation film on one surface of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof adhesive layer, and scattering carborundum on the other surface of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof adhesive layer to obtain the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material.
Example 5
The maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material comprises a diamond sand layer, a maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer and an isolation layer, wherein the diamond sand layer, the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer and the isolation layer are sequentially attached to each other, and the isolation layer is a release film. Wherein the thickness of the carborundum layer is 0.01 mm; the thickness of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer is 1.8 mm; the thickness of the isolation layer is 0.03 mm.
The maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer comprises the following raw materials in parts by mass: 10 parts of No. 10 asphalt, 30 parts of No. 100 asphalt, 10 parts of rubber modifier SEBS, 25 parts of bimodal polyethylene, 10 parts of maleic anhydride and 0.5 part of grafting agent dicumyl peroxide.
The preparation method of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material comprises the following steps:
s1, adding bimodal polyethylene, maleic anhydride and a grafting agent into a high-speed dispersion machine according to the selected mass parts, stirring at a high speed for 5min, then stirring at a low speed for 2min to obtain maleic anhydride grafted bimodal polyethylene, and canning for use;
s2, heating the asphalt to 90 ℃, adding the rubber modifier and the maleic anhydride grafted bimodal polyethylene while stirring, and stirring for 3-5min to obtain a mixture;
s3, forcibly feeding the mixture to a feed inlet of a double-screw extruder by using a rotating screw, extruding and shearing the mixture in the double screws, adjusting the rotating speed to 35-45Hz, then carrying out double-roller extrusion forming on the mixture, adjusting the gap between forming rollers to control the thickness of a high-strength modified asphalt glue layer to be 1.8mm, and obtaining a maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer;
and S4, covering an isolation film on one surface of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof adhesive layer, and scattering carborundum on the other surface of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof adhesive layer to obtain the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material.
Example 6
The maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material comprises a diamond sand layer, a maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer and an isolation layer, wherein the diamond sand layer, the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer and the isolation layer are sequentially attached to each other, and the isolation layer is a release film. Wherein the thickness of the carborundum layer is 0.01 mm; the thickness of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer is 1.8 mm; the thickness of the isolation layer is 0.03 mm.
The preparation raw materials of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer comprise the following components in parts by mass: 10 parts of No. 10 asphalt, 20 parts of No. 100 asphalt, 8 parts of rubber modifier SEBS, 21 parts of bimodal polyethylene, 8 parts of maleic anhydride and 1 part of grafting agent dicumyl peroxide.
The preparation method of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material is the same as that in example 1.
Example 7
The maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material comprises a diamond sand layer, a maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer and an isolation layer, wherein the diamond sand layer, the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer and the isolation layer are sequentially attached to each other, and the isolation layer is a release film. Wherein the thickness of the carborundum layer is 0.01 mm; the thickness of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer is 1.8 mm; the thickness of the isolation layer is 0.03 mm.
The preparation raw materials of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer comprise the following components in parts by mass: 20 parts of No. 10 asphalt, 10 parts of No. 100 asphalt, 12 parts of rubber modifier SEBS, 20 parts of bimodal polyethylene, 7 parts of maleic anhydride and 0.6 part of grafting agent dicumyl peroxide.
The preparation method of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material is the same as that in example 1.
Example 8
The maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material comprises a diamond sand layer, a maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer and an isolation layer, wherein the diamond sand layer, the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer and the isolation layer are sequentially attached to each other, and the isolation layer is a release film. Wherein the thickness of the carborundum layer is 0.01 mm; the thickness of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer is 1.8 mm; the thickness of the isolation layer is 0.03 mm.
The preparation raw materials of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer comprise the following components in parts by mass: 20 parts of No. 10 asphalt, 10 parts of No. 100 asphalt, 12 parts of rubber modifier SBS, 20 parts of bimodal polyethylene, 7 parts of maleic anhydride and 0.6 part of grafting agent dicumyl peroxide.
The preparation method of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material is the same as that in example 1.
Example 9
The maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material comprises a diamond sand layer, a maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer and an isolation layer, wherein the diamond sand layer, the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer and the isolation layer are sequentially attached to each other, and the isolation layer is a release film. Wherein the thickness of the carborundum layer is 0.01 mm; the thickness of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer is 1.8 mm; the thickness of the isolation layer is 0.03 mm.
The preparation raw materials of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer comprise the following components in parts by mass: 20 parts of No. 10 asphalt, 10 parts of No. 100 asphalt, 12 parts of rubber modifier SEBS, 20 parts of bimodal polyethylene, 7 parts of maleic anhydride and 0.6 part of grafting agent Benzoyl Peroxide (BPO).
The preparation method of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material is the same as that in example 1.
Detection of physical properties of maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material
The physical properties of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof materials of the above embodiments are detected, and the physical indexes and the detection results are shown in table 1 below. The following table shows that the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material disclosed by the invention has excellent physical mechanical property, excellent processing property, excellent anti-aging property and weather resistance, wherein the components in the formulas of the examples 1-5 are in an optimal range by mass, and the components are preferred examples and have significantly better performance compared with products of other examples; example 8 compares with example 7, except that SBS is used as rubber modifier, example 9 compares with example 7, except that BPO is used as grafting agent, and the physical and mechanical properties of the products of examples 8 and 9 are not the same as those of example 7.
TABLE 1
Figure BDA0002849854880000101
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (5)

1. The maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer is characterized in that the preparation raw materials comprise the following components:
asphalt, a rubber modifier, bimodal polyethylene, maleic anhydride and a grafting agent;
30-48 parts of asphalt, 8-12 parts of rubber modifier, 20-25 parts of bimodal polyethylene, 5-10 parts of maleic anhydride and 0.5-1 part of grafting agent;
the asphalt is a mixture of No. 10 asphalt and No. 100 asphalt;
the rubber modifier is SEBS;
the grafting agent is dicumyl peroxide;
the grafting rate of the maleic anhydride grafted bimodal polyethylene is 1.5% -3% by mixing the bimodal polyethylene, the maleic anhydride and the grafting agent and stirring.
2. A method of preparing the maleic anhydride grafted bimodal polyethylene modified asphalt waterproofing glue layer according to claim 1, characterized in that it comprises the following steps:
s1, mixing bimodal polyethylene, maleic anhydride and a grafting agent, and stirring to obtain maleic anhydride grafted bimodal polyethylene;
s2, mixing asphalt, a rubber modifier and maleic anhydride grafted bimodal polyethylene, and stirring to obtain a mixture;
and S3, carrying out forced feeding, mixing, shearing and extrusion molding on the mixture to obtain the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof adhesive layer.
3. A maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material is characterized in that:
the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer comprises the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer as claimed in claim 1, wherein a carborundum layer is arranged on the upper surface of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer in a fit mode, an isolation layer is arranged on the lower surface of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer, and the isolation layer is a release film or release paper.
4. The maleic anhydride grafted bimodal polyethylene modified asphalt waterproofing material according to claim 3, wherein:
the thickness of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer is 1.5-2.0 mm; the thickness of the carborundum layer is 0.01-0.012 mm; the thickness of the isolation layer is 0.03-0.04 mm.
5. A method for preparing the maleic anhydride grafted bimodal polyethylene modified asphalt waterproofing material as described in claim 3 or 4, which is characterized by comprising the following steps:
covering an isolating film or isolating paper on one surface of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer, and scattering carborundum on the other surface of the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof glue layer to obtain the maleic anhydride grafted bimodal polyethylene modified asphalt waterproof material.
CN202011543291.0A 2020-12-21 2020-12-21 Maleic anhydride grafted bimodal polyethylene modified asphalt waterproof adhesive layer, waterproof material and preparation method of waterproof material Active CN112708397B (en)

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