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Preparation method of polyurethane and SBS (Styrene Butadiene Styrene) composite modified asphalt

A technology of compound modified asphalt and polyurethane, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of easy segregation, poor high temperature storage stability, and large amount of modifiers.

Pending Publication Date: 2022-03-04
HARBIN INST OF TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problems of the existing modified asphalt with large amount of modifier, poor high-temperature storage stability, and easy segregation, and provide a method for preparing polyurethane and SBS composite modified asphalt, which can comprehensively improve asphalt roads. Performance

Method used

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  • Preparation method of polyurethane and SBS (Styrene Butadiene Styrene) composite modified asphalt
  • Preparation method of polyurethane and SBS (Styrene Butadiene Styrene) composite modified asphalt
  • Preparation method of polyurethane and SBS (Styrene Butadiene Styrene) composite modified asphalt

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Embodiment 1

[0022] Embodiment 1: the preparation method of the polyurethane of the present embodiment and SBS composite modified asphalt, carry out according to the following steps:

[0023] 1. Weigh 900g base petroleum asphalt, 18g styrene-butadiene-styrene block copolymer (SBS), 18g polyurethane reactive additive; wherein styrene-butadiene-styrene block copolymer is linear SBS, produced by Huizhou Li Changrong Rubber Co., Ltd., the trade name is SBS 3501; the polyurethane reactive additive is liquid, and has isocyanate as the active functional group, produced by BASF;

[0024] 2. Heat the base petroleum asphalt to 170°C, add styrene-butadiene-styrene block copolymer (SBS) to the base petroleum asphalt, and stir for 15min at a speed of 1500rpm; then increase the speed to 4000rpm, continue stirring for 1h to obtain SBS modified asphalt matrix;

[0025] 3. Reduce the temperature of the SBS modified asphalt matrix to 145°C, add polyurethane reactive additives, and stir at a speed of 3000rp...

Embodiment 2

[0026] Embodiment 2: the preparation method of polyurethane and SBS composite modified asphalt of this embodiment is different from embodiment 1 in step 1, weighs 900g matrix petroleum asphalt, 18g styrene-butadiene-styrene block copolymer (SBS), 13.5g polyurethane reactive additive; Others are identical with embodiment 1, obtain polyurethane and SBS composite modified asphalt, and mark as 2%SBS+1.5% polyurethane.

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Abstract

The invention discloses a preparation method of polyurethane and SBS (Styrene Butadiene Styrene) composite modified asphalt, and relates to a preparation method of modified asphalt. The invention aims to solve the technical problems that the existing modified asphalt is large in modifier mixing amount, poor in high-temperature storage stability and easy to separate. The method comprises the following steps: 1, weighing matrix petroleum asphalt, a styrene-butadiene-styrene block copolymer and a polyurethane reaction type additive; 2, adding the styrene-butadiene-styrene block copolymer into the matrix petroleum asphalt, and stirring to react, so as to obtain an SBS (Styrene Butadiene Styrene) modified asphalt matrix; and adding the polyurethane reaction type additive into the SBS modified asphalt matrix for reaction to obtain the polyurethane and SBS composite modified asphalt. Compared with traditional SBS modified asphalt, the composite modified asphalt can play the advantages of physical-chemical modification, so that the high-temperature rutting resistance and the high-temperature storage stability are improved, and the composite modified asphalt has equivalent low-temperature crack resistance and can be applied to the field of road engineering.

Description

technical field [0001] The invention relates to a method for preparing modified asphalt. Background technique [0002] Asphalt is a necessary bonding material in road construction projects. With the development of road traffic, the requirements for asphalt are also increasing. Through asphalt modification technology, the road performance of asphalt materials can be improved, and the service level and service level of asphalt pavement can be improved. Service life, the current mainstream in the field of road engineering. At present, polymers represented by styrene-butadiene-styrene block copolymer SBS are often used to modify asphalt. Method" discloses an asphalt modifier mixed with rubber powder, styrene-butadiene block copolymer, lignin, organic bentonite, rubber oil and polyurethane. Then mix the asphalt modifier into the asphalt which has been heated and mixed to obtain modified asphalt. This method belongs to physical method modification. The modifier and asphalt are ...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08L75/04
CPCC08L95/00C08L53/02C08L75/04
Inventor 李鹏飞胡观峰王大为陶洁璇王东旭洪斌李添帅
Owner HARBIN INST OF TECH
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