SBS modified asphalt with affinity group and preparation method thereof

A technology of modified asphalt and matrix asphalt, which is applied to building components, building insulation materials, buildings, etc., and can solve problems such as high difficulty and waste products

Inactive Publication Date: 2013-04-24
SHANGHAI PUDONG LUQIAO ASPHALT MATERIAL CO LTD +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

When this situation occurs, it is very difficult to solve, and even the product must be discarded

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  • SBS modified asphalt with affinity group and preparation method thereof

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Embodiment

[0029] The preparation method of the SBS modified asphalt with affinity group comprises the steps:

[0030] A. 75-95% by weight of base asphalt is injected into a weighing container equipped with a stirrer from a heat exchange system with a low-temperature heat exchanger via an asphalt pump, and 75-95% by weight of base asphalt is heated to 170 ℃~180℃;

[0031] B. Add 3-10% by weight of SBS and 0.5-6% by weight of co-solvent into the base asphalt, stir for 25-30 minutes, and send it into the swelling container through a high-power asphalt pump;

[0032] C. Add 0.5-5% by weight stabilizer and 2-10% by weight affinity group additive in sequence, keep the temperature in the range of 170-180°C, and stir for 35-45 min;

[0033] D. The mixture obtained in step C is sheared and dispersed with a pipeline shearer, sent into a storage tank with a pipeline pump, and then developed again for 1h to 3h to obtain the SBS with the affinity group modified asphalt.

[0034] Table 1 shows the...

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Abstract

The invention discloses an SBS modified asphalt with an affinity group. The asphalt comprises, by weight, 3 to 10% of SBS, 0.5 to 5% of a stabilizing agent, 0.5 to 6% of a cosolvent, 2 to 10% of an affinity group additive and 75 to 95% of matrix asphalt. The invention further discloses a preparation method for the SBS modified asphalt with the affinity group. The SBS modified asphalt provided by the invention can break balance between an SBS modifier and the asphalt, prevents aggregation of SBS, improves dispersibility of the SBS modifier in the asphalt, enhances overall performance of the SBS modified asphalt and enables data (i.e., a softening point difference) of a segregation experiment to be obviously reduced.

Description

technical field [0001] The invention relates to a SBS modified asphalt and a preparation method thereof, in particular to an SBS modified asphalt with an affinity group and a preparation method thereof. Background technique [0002] SBS (Styrene-Butadiene-Styrene Block Copolymer) has been used as a mainstream modifier for nearly 20 years. Because of its outstanding modification effect and simple modification method, it has won unanimous praise and praise. widely used. [0003] However, from nearly 20 years of experience, SBS modified asphalt also has unavoidable defects: [0004] 1. SBS (Styrene-Butadiene-Styrene Block Copolymer) is a rubber-like thermoplastic elastomer, which is a polymer product. Due to its rubber-like characteristics, it is not completely dissolved by asphalt, and its stability in asphalt Dispersion is a form of kinetic stability rather than thermodynamic stability, and segregation of upper and lower layers is prone to occur during storage. When the ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08L101/06
Inventor 张浩刚蒯苗俊郭贵全胡睿周曹伟李代飞
Owner SHANGHAI PUDONG LUQIAO ASPHALT MATERIAL CO LTD
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