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A kind of high-viscosity and high-elasticity modified asphalt and its preparation and application

A modified asphalt, viscoelastic technology, applied in building components, building insulation materials, construction, etc., can solve the problems of expensive modified asphalt, poor aging resistance, complicated manufacturing process, etc., and achieve high cost performance and stable preparation , the effect of improving compatibility

Active Publication Date: 2022-03-29
中路交建(北京)工程材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the published patents on high-viscosity modified asphalt are blending and granulating various SBS, SBR and petroleum resins to prepare modifiers. The manufacturing process is complicated and the cost is high
In terms of use, the most common applications include high-viscosity modified asphalt prepared by TPS modifier imported from Japan and SK high-viscosity modified asphalt from South Korea. These modified asphalts are expensive and costly
[0003] Since SBS is a weakly polar polymer, it develops through shear swelling in petroleum asphalt, but this process is still mechanically melted and dispersed, and no chemical reaction occurs, so it is unstable to a certain extent during storage, transportation and use. and segregation
At the same time, because the butadiene segment in the molecular structure of SBS contains C=C double bonds, its chemical properties are relatively active, and its aging resistance to oxygen, ozone and ultraviolet light is poor.

Method used

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  • A kind of high-viscosity and high-elasticity modified asphalt and its preparation and application
  • A kind of high-viscosity and high-elasticity modified asphalt and its preparation and application
  • A kind of high-viscosity and high-elasticity modified asphalt and its preparation and application

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Experimental program
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Effect test

Embodiment 1

[0035] The high-viscosity and high-elasticity modified asphalt in this embodiment is made of the following raw materials in parts by weight: 100 parts of base asphalt, 9.5 parts of SBS graft copolymer, 0.5 part of tackifying resin modified rosin ester, 0.2 part of antioxidant 1010, and 1.0 parts of sulfur part, 0.2 part of compatibilizer rubber oil; the SBS is a star-shaped styrene-butadiene-styrene block copolymer, purchased from Yanshan Petrochemical.

[0036] The method for preparing high-viscosity and high-elasticity modified asphalt in this embodiment comprises the following steps:

[0037] Step 1: The solvent is toluene. Put SBS and solvent in the reactor at a volume ratio of 1:1. After dissolving completely at 60°C, add the toluene solution of benzoyl peroxide (BPO), blow nitrogen, stir and heat up To 80 DEG C, dropwise add the methyl methacrylate (MMA) that is dissolved with BPO, wherein, BPO total amount is 0.9% of SBS quality, MMA quality is 25% of SBS quality, insul...

Embodiment 2

[0047] The high-viscosity and high-elasticity modified asphalt in this embodiment is made of the following raw materials in parts by weight: 100 parts of base asphalt, 6.5 parts of SBS graft copolymer, 2 parts of tackifying resin paraffin petroleum resin, 0.35 part of antioxidant BHT, and 0.8 parts of sulfur part, 0.5 part of compatibilizer rubber oil; the SBS is a star-shaped styrene-butadiene-styrene block copolymer.

[0048] The method for preparing high-viscosity and high-elasticity modified asphalt in this embodiment comprises the following steps:

[0049] Step 1: The solvent is cyclohexane. Put SBS and solvent at a ratio of 1:1 (the solvent must completely dissolve SBS) and place it in the reactor. After the solution is completely dissolved at 55°C, add BPO cyclohexane solution and blow nitrogen. Stir and heat up to 75°C, add BPO-dissolved butyl acrylate (BA) dropwise, wherein the total amount of BPO is 1.0% of the mass of SBS, and the mass of BA is 30% of the mass of SB...

Embodiment 3

[0058] The high-viscosity and high-elasticity modified asphalt in this embodiment is made of the following raw materials in parts by weight: 100 parts of base asphalt, 8 parts of SBS graft copolymer, 1.5 parts of tackifying resin polyterpene resin, 0.3 part of antioxidant BHT, sulfur 1.0 parts of the donor, 0.8 parts of rubber oil as a compatibilizer; the SBS is a star-shaped styrene-butadiene-styrene block copolymer.

[0059] The method for preparing high-viscosity and high-elasticity modified asphalt in this embodiment comprises the following steps:

[0060] Step 1: The solvent is 120# solvent oil, put SBS and solvent in the reactor at a ratio of 1:1, and after it is completely dissolved at 50°C, add azobisisobutyronitrile (AIBN) 120# solvent oil solution, and blow nitrogen , stirred and heated up to 70°C, and added dropwise methyl methacrylate (MAA) having AIBN dissolved therein, wherein the total amount of AIBN was 1.5% of the mass of SBS, and the mass of MAA was 25% of th...

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Abstract

The invention provides a high-viscosity and high-elasticity modified asphalt, which is made of the following raw materials in parts by weight: 100 parts of base asphalt, 6.5-9.5 parts of SBS graft copolymer, 0.5-2 parts of tackifying resin, and 0.1-0.35 parts of antioxidant parts, vulcanizing agent 0.2-1.5 parts, compatibilizer rubber oil 0.1-1.0 parts. The invention also proposes a preparation method and application of the high-viscosity and high-elasticity modified asphalt. The high-viscosity and high-elasticity modified asphalt provided by the invention has good high-temperature stability, low-temperature crack resistance and aging resistance, and can replace expensive imported high-viscosity modified asphalt without affecting the performance of the road surface, reducing engineering The cost is low, and it can be widely used in the paving of domestic high-performance pavements.

Description

technical field [0001] The invention belongs to the field of road engineering and the field of compositions based on polymer compositions, and in particular relates to a polyethylene copolymer modified asphalt, its preparation method and application. Background technique [0002] With the rapid development of the transportation industry, higher requirements are put forward for the quality of road surfaces, and high-performance road surfaces, multi-functional road surfaces, and special road surfaces emerge as the times require. Therefore, the development of modified asphalt is facing greater challenges. Ordinary modified asphalt, as the binder of pavement, has problems such as low viscosity, insufficient thickness of aggregate coating, and low durability of pavement under heavy-duty traffic. In recent years, high-viscosity and high-elasticity modified asphalt has become a research hotspot, which is widely used in the pavement of large-pore drainage and noise reduction pavemen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L93/04C08L91/00C08L57/02C08L45/00C08L51/00C08K3/06C08F287/00C08F220/14C08F220/18C08F220/06
CPCC08F287/00C08L95/00C08L2201/08C08L2205/08C08L2205/035C08L93/04C08L91/00C08L51/006C08K3/06C08L57/02C08L45/00C08F220/1804
Inventor 曹东伟张海燕夏磊康健
Owner 中路交建(北京)工程材料技术有限公司
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