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Composite waste-rubber-powder particles capable of being stored stably and preparation method thereof

A technology of waste rubber powder and particles, which is applied in the field of composite waste rubber powder particles and its preparation, can solve the problems of asphalt tank overflow, modified asphalt softening point attenuation, and increase the cost of modified asphalt, so as to facilitate production and improve high temperature viscosity Effect

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

AI Technical Summary

Problems solved by technology

[0005] (1) The interface between rubber powder and asphalt is not well bonded, resulting in layering and segregation of rubber powder and asphalt
[0006] (2) During the heat storage process of rubber powder modified asphalt, the softening point of modified asphalt and other indicators are attenuated due to the continuous degradation of rubber powder
This method uses an aqueous solution to coat the rubber powder, and a large amount of aqueous solution will remain between the rubber powder. The water will quickly evaporate to form a large amount of steam when the asphalt is modified, causing the asphalt tank to overflow and cause production accidents. At the same time, the expensive silane coupling agent Will directly increase the cost of modified asphalt

Method used

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  • Composite waste-rubber-powder particles capable of being stored stably and preparation method thereof
  • Composite waste-rubber-powder particles capable of being stored stably and preparation method thereof
  • Composite waste-rubber-powder particles capable of being stored stably and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Pretreat 5-mesh 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-stage twin-screw extruder. The die extrudes highly desulfurized reclaimed rubber. Subsequently, the highly desulfurized reclaimed rubber is metered into the second-stage single-screw extruder through the connector, and the feeding speed of the hopper is adjusted according to the weight ratio of highly desulfurized reclaimed rubber, 40-mesh rubber powder, and crosslinking agent to 80:20:0.1 40-mesh rubber powder, uniformly mixed, extruded, and water-cooled granulated to prepare composite rubber powder particles. Weigh 30% composite rubber powder particles according to the weight ratio of the base asphalt, add it to the base asphalt and stir rapidly for 15 minutes, then add 0.4% stabilizer after stirring, use a colloid mill to grind once (10 minutes), and incubate at 170-175°C After 4 hours, the modif...

Embodiment 2

[0044] 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-stage twin-screw extruder. Extrude highly desulfurized reclaimed rubber. Subsequently, the highly desulfurized reclaimed rubber is metered into the second-stage single-screw extruder through the connector, and the feeding speed of the hopper is adjusted at the same time according to the weight ratio of highly desulfurized reclaimed rubber, 40 mesh rubber powder, and crosslinking agent is 70:30:0.3 40-mesh rubber powder and cross-linking agent are uniformly mixed, extruded, and water-cooled granulated to prepare composite rubber powder particles. Weigh 30.1% composite rubber powder particles according to the weight ratio of the base asphalt, add it to the base asphalt and stir rapidly for 15 minutes, then add 0.4% stabilizer after stirring, use a colloid mill to grind once (10 minutes), and incubate at 170-...

Embodiment 3

[0046] 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 then add them to the first-stage twin-screw extruder. Extrude highly desulfurized reclaimed rubber. Subsequently, the highly desulfurized reclaimed rubber is metered into the second-stage single-screw extruder through the connector, and the feeding speed of the hopper is adjusted at the same time according to the weight ratio of highly desulfurized reclaimed rubber, 40 mesh rubber powder, and crosslinking agent is 60:40:0.5 40-mesh rubber powder and cross-linking agent are uniformly mixed, extruded, and water-cooled granulated to prepare composite rubber powder particles. Weigh 30.2% composite rubber powder particles according to the weight ratio of the base asphalt, add it to the base asphalt and stir rapidly for 15 minutes, then add 0.4% stabilizer after stirring, use a colloid mill to grind once (10 minutes), and incubate at...

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Abstract

The invention relates to composite waste-rubber-powder particles capable of being stored stably and a preparation method thereof. The preparation method comprises the steps of firstly carrying out deep-desulfurization degradation on low-mesh rubber powder so as to prepare high-desulfurization-degree reclaimed rubber, and then, mixing high-mesh rubber powder, the high-desulfurization-degree reclaimed rubber and a small amount of cross-linking agent according to a certain ratio, thereby preparing the composite waste-rubber-powder particles. According to the composite waste-rubber-powder particles, linear macromolecules in the high-desulfurization-degree reclaimed rubber are uniformly attached to the surface of the rubber powder, and meanwhile, a linear macromolecule-cross-linked structured core-shell structure is formed by using the micro-cross-linking action of the cross-linking agent. Due to the structure, a large number of linear molecules can intermesh in asphalt, and then, a stable rubber powder-asphalt mesh structure is formed, so that the aim of preparing stably-stored rubber powder modified asphalt is achieved.

Description

technical field [0001] The invention relates to a compound waste rubber powder particle and a preparation method thereof, belonging to the field of recycling and utilization of waste rubber. Background technique [0002] Polymer modified asphalt is recognized as an excellent pavement material because of its excellent high and low temperature performance, and waste rubber powder modified asphalt is a research hotspot in recent years. Rubber powder modified asphalt has been used to pave roads at home and abroad for many years. Especially the successful practice in the United States shows that the waste rubber powder modified asphalt pavement is half thinner than the pure asphalt pavement, but its service life is doubled, which can improve the heat resistance and cold resistance of the pavement, and can reduce noise and prevent wet skid , Crushed ice and snow, improve safety factor, especially low price. The addition of waste rubber powder can enhance toughness, effectively a...

Claims

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Application Information

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IPC IPC(8): C08L17/00C08L21/00C08J11/10
CPCY02W30/62
Inventor 江宽董大伟陈俊峰马庆杰刘双旺
Owner TIANJIN HI TECH ENVIRONMENT DEV CO LTD
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