Composite-SBS (Styrene Butadiene Styrene block polymer)-particle modified asphalt with storage stability and aging resistance and preparation method thereof

A modified asphalt, aging-resistant technology, applied in building components, building insulation materials, construction and other directions, can solve the problems of increasing the viscosity of the modified asphalt system, the inability of the rubber powder to achieve high activation, and increasing the difficulty of construction, and achieve high-temperature storage stability. Excellent properties, excellent aging resistance, and low cost

Inactive Publication Date: 2015-06-10
TIANJIN HI TECH ENVIRONMENT DEV CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method prepares particles by blending SBS and rubber powder under high temperature and high shear conditions. This high temperature and high shear will cause SBS to degrade, thereby weakening its modification effect; at the same time, without external activation aids With the aid of the agent, the rubber powder cannot reach a highly activated state only by thermal shearing, and a considerable part of the cross-linked structure is retained. The addition of a large amount of rubber powder particles with this cross-linked structure will increase the viscosity of the modified asphalt system and increase the construction efficiency. difficulty
Moreover, this method is mixed with higher-priced furfural oil, which is not beneficial to the reduction of the cost of modified asphalt

Method used

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  • Composite-SBS (Styrene Butadiene Styrene block polymer)-particle modified asphalt with storage stability and aging resistance and preparation method thereof
  • Composite-SBS (Styrene Butadiene Styrene block polymer)-particle modified asphalt with storage stability and aging resistance and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037]Pretreat rubber powder, softening oil, and activator in a high-speed mixer at 70°C for 15 minutes according to the weight ratio of 100:5:2, and add them to the first screw extruder by metering, and control the temperature of different sections of the twin-screw at 100-380°C . Among them, the first section: 150-200°C, the second section: 250-300°C; the third section: 300-350°C; the fourth section: 300-350°C; the fifth section: 150-200°C. , The anti-thread element is mixed and pressurized so that the material pressure is about 10Mpa, and the screw speed is controlled at about 100rpm. After shearing and reacting for about 10min, the deeply activated rubber powder is extruded from the die. Subsequently, the deep activated rubber powder is metered into the second screw extruder through the connector, and at the same time adjust the feeding speed of the hopper to add SBS and interfacial phase according to the weight ratio of SBS, deep activated rubber powder and interfacial co...

Embodiment 2

[0039] Pretreat rubber powder, softening oil, and activator in a high-speed mixer at 70°C for 15 minutes according to the weight ratio of 100:10:1, and add them to the first screw extruder, and extrude from the die after shearing and reacting. Activated rubber powder. Subsequently, the deep activated rubber powder is metered into the second screw extruder through the connector, and at the same time adjust the feeding speed of the hopper according to the weight ratio of SBS, deep activated rubber powder, and interfacial compatibilizer by adding SBS and interfacial compatibilizer agent, uniformly mixed, extruded, and water-cooled granulated to prepare storage-stable, aging-resistant composite SBS particles. The process parameters of each step are basically the same as in Example 1. Weigh 10% of storage-stable and aging-resistant composite SBS particles according to the weight ratio of base asphalt, add them to base asphalt and shear for 5 minutes, then stir and add 0.4% stabili...

Embodiment 3

[0041] Pretreat rubber powder, softening oil, and activator in a high-speed mixer at 70°C for 15 minutes according to the weight ratio of 100:15:3, and add them to the first screw extruder, and extrude from the die to a depth of Activated rubber powder. Subsequently, the deeply activated rubber powder is metered into the second screw extruder through the connector, and at the same time adjust the feeding speed of the hopper to add SBS and interface compatibilizer according to the weight ratio of SBS, deep activated rubber powder and interfacial compatibilizer 28:68:4 agent, uniformly mixed, extruded, and water-cooled granulated to prepare storage-stable, aging-resistant composite SBS particles. The process parameters of each step are basically the same as in Example 1. Weigh 12% storage-stable and aging-resistant composite SBS particles according to the weight ratio of the base asphalt, add them to the base asphalt and shear for 5 minutes, then add 0.4% stabilizer with stirri...

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Abstract

The invention relates to composite-SBS (Styrene Butadiene Styrene block polymer)-particle modified asphalt with storage stability and aging resistance and a preparation method thereof. Composite SBS particles contain the ingredients in percentage by mass: 15-38% of SBS, 56-82% of deep-activated rubber powder and 3-6% of an interface compatibilizer, wherein the deep-activated rubber powder consists of rubber powder, softening oil and an activator. The method comprises the steps: preparing the deep-activated rubber powder from waste rubber powder by using the high-temperature and high-shear action of a twin-screw extruder; thoroughly mixing the SBS particles and the deep-activated rubber powder by using the blending action of screws, and granulating to prepare the composite SBS particles, thereby preparing the modified asphalt. Compared with modified asphalt modified by ordinary SBS modifiers, the composite-SBS-particle modified asphalt has the advantages that the ageing resistance is excellent, and heat storage does not separate out basically. Waste/used tires can be massively consumed, so as to relieve black pollution. According to the modified asphalt, urban noise pollution and road surface microstructure can be lowered, road surface drainage is facilitated, water splashing is reduced, and the safety performance of driving is improved.

Description

technical field [0001] The invention relates to a building material used in the engineering field, in particular to a stable-storage, aging-resistant composite SBS particle-modified asphalt and a preparation method thereof. Background technique [0002] At present, the addition of polymers to improve the performance of base asphalt has been widely recognized in the industry. Styrene butadiene block copolymer (SBS) is a mature polymer-modified asphalt modifier, and its dosage accounts for more than half of the total modifier. The thermoplastic elastomer SBS has the characteristics of two phases of rubber and plastic, and the modified asphalt prepared by it has good high and low temperature performance, and has good deformation recovery ability, and is an excellent modifier. However, its high price and high cost of modified asphalt materials limit the wide application of SBS. Therefore, people are looking for a more economical and better performance asphalt modifier to repla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08L21/00C08L51/06C08L23/08C08L23/06C08L23/12C08L23/30C08K13/02C08K5/01C08K3/06C08K3/22C08K5/14C08K5/098B29C47/92B29C48/92
Inventor 董大伟江宽陈俊峰马庆杰刘双旺
Owner TIANJIN HI TECH ENVIRONMENT DEV CO LTD
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