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Modified asphalt with good high-temperature cohesiveness and preparation method thereof

A modified asphalt, cohesive technology, used in building insulation materials, building components, construction, etc.

Pending Publication Date: 2022-07-01
秦惠丽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Therefore, the asphalt required to be used has high cohesiveness and impact resistance, and common modified asphalt is difficult to meet the requirements; and only with higher viscosity and impact resistance can the occurrence of diseases be reduced; therefore, the present invention researches and prepares A modified asphalt with good cohesiveness and impact resistance at high temperature

Method used

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  • Modified asphalt with good high-temperature cohesiveness and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0029](1) Mix cyclohexane, polyethylene glycol monomethyl ether, sodium hydroxide, anhydrous sodium sulfate and deionized water in a mass ratio of 2:3:0.5:0.02:6, purge with argon for 3 min, 40 After 1 h of reaction at ℃, p-chloromethylstyrene with 0.2 times the mass of cyclohexane was added dropwise at a rate of 3 ml / min, the temperature was raised to 60 ℃, the reaction was continued for 2 h, and finally extracted with deionized water once, and extracted with dichloromethane. 3 times and rotary steaming to obtain polyethylene oxide containing benzene ring; polyethylene glycol and tetrahydrofuran are mixed in a mass ratio of 1:2 and placed in an ice bath at 0°C, under nitrogen atmosphere, polyethylene oxide is added. The initiator boron trifluoride ethyl ether with 0.003 times the mass of alcohol was stirred for 15 min at 30 rpm, and propylene oxide with 0.05 times the mass of polyethylene glycol was added dropwise at a rate of 10 drops / s. After the reaction for 4 h, it was adj...

Embodiment 2

[0035] (1) Mix cyclohexane, polyethylene glycol monomethyl ether, sodium hydroxide, anhydrous sodium sulfate and deionized water in a mass ratio of 2:3.5:0.6:0.04:7, purge with argon for 4min, 45 After 1.5 hours of reaction at ℃, p-chloromethylstyrene with 0.4 times the mass of cyclohexane was added dropwise at a rate of 4 ml / min, the temperature was raised to 63 ℃, and the reaction was continued for 2.5 hours. Methane was extracted for 4 times and rotary steamed to obtain polyethylene oxide containing benzene ring; polyethylene glycol and tetrahydrofuran were mixed in a mass ratio of 1:3 and placed in an ice bath at 1 °C, under nitrogen atmosphere, added polyethylene oxide. The initiator boron trifluoride ether with 0.0034 times the mass of ethylene glycol was stirred for 25 min at 40 rpm, and propylene oxide with 0.1.3 times the mass of polyethylene glycol was added dropwise at a rate of 13 drops / s. Sodium bicarbonate was adjusted to pH 7, trihydroxymethyl propane with a mas...

Embodiment 3

[0041] (1) Mix cyclohexane, polyethylene glycol monomethyl ether, sodium hydroxide, anhydrous sodium sulfate and deionized water in a mass ratio of 2:4:0.8:0.05:8, purging with argon for 5 min, 50 After 2 hours of reaction at ℃, p-chloromethyl styrene with 0.5 times the mass of cyclohexane was added dropwise at a rate of 5 ml / min, the temperature was raised to 65 ℃, the reaction was continued for 3 hours, and finally extracted with deionized water once, and extracted with dichloromethane. 5 times and rotary steam to obtain polyethylene oxide containing benzene ring; polyethylene glycol and tetrahydrofuran are mixed in a mass ratio of 1:4 and placed in an ice bath at 2 °C, under nitrogen atmosphere, polyethylene oxide is added The initiator boron trifluoride ethyl ether with 0.005 times the mass of alcohol was stirred for 30 min at 50 rpm, and propylene oxide with 0.2 times the mass of polyethylene glycol was added dropwise at a rate of 15 drops / s. After 8 hours of reaction, it ...

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Abstract

The invention discloses modified asphalt with good high-temperature cohesiveness and a preparation method thereof, and relates to the technical field of asphalt preparation. The modified asphalt with good high-temperature cohesiveness prepared by the invention comprises a modified carbon nanotube prepared by coating a pre-modified carbon nanotube with water-based tackifying resin, a styrene-butadiene-styrene block copolymer, a tackifier, aromatic oil and matrix asphalt, the phenolic resin and the modified polyether form a cross-linked structure to enhance the toughness of the water-based tackifying resin, and then the hydroxylated multi-walled carbon nanotubes grafted with 4, 4 '-diphenylmethane diisocyanate are coated to enhance the impact resistance of the modified asphalt; and the tackifier is modified polyethylene naphthalate which has relatively large steric hindrance, so that the movement of calcium carbonate and the modified carbon nanotubes is limited, and the cohesiveness of the modified asphalt is enhanced.

Description

technical field [0001] The invention relates to the technical field of asphalt preparation materials, in particular to a modified asphalt with good high-temperature cohesion and a preparation method thereof. Background technique [0002] In the long-term service process of asphalt pavement, diseases such as cracks, looseness and potholes will occur. In addition to the design and construction factors, these diseases are also related to the aging of asphalt; in the process of long-term aging, the light components of asphalt volatilize, saturated components, Aromatic fractions are transformed into asphaltenes and colloids. At the same time, oxygen can react chemically with various components in asphalt, and the functional groups in asphalt change under the combined action of heat and oxygen, resulting in carbonyl and sulfoxide groups; asphalt The change of components and functional groups leads to the hardening of the asphalt, the reduction of flexibility, and the deterioration...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08L67/02C08K9/10C08K3/04C08K3/26
CPCC08L95/00C08K2003/265C08L53/02C08L67/02C08K9/10C08K3/041C08K3/26
Inventor 秦惠丽
Owner 秦惠丽
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