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Low-temperature high-molecular resin modifying agent and preparation method of modified asphalt

A technology of polymer resin and modified asphalt, which is applied in the direction of building insulation materials, building components, buildings, etc., and can solve the problems of the quality of modified asphalt

Inactive Publication Date: 2016-03-02
吕刚 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it also needs special attention, because when it is stored at high temperature or low temperature for a long time, many pretreated modified asphalts are very sensitive to the temperature drop, and it is not easy to grasp the temperature rise and fall in the process of storage, transportation and use. , will affect the quality of modified asphalt

Method used

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Embodiment Construction

[0017] Below, the present invention is described in further detail.

[0018] The necessary shear times during production can only be determined through laboratory tests and testing results in modified asphalt equipment. The temperature of asphalt during production is also very critical. Generally, the minimum temperature is required to be 170°C. The specific value depends on the grade of asphalt and the percentage of polymer added. Under normal circumstances, the amount of high molecular polymer required to produce modified asphalt should be about 4% to 6%.

[0019] The composite modification scheme is:

[0020] ——Main Modifier

[0021] SBS uses Yueyang Petrochemical 4303 (improved type of Daokai II), with a content of 3-3.2%;

[0022] ——Auxiliary modifier SBR, after our pre-modification treatment, the content is 1.5-2‰;

[0023] ——Modifier, specially developed for this technical formula, with a content of 1.5-2‰.

[0024] SBS is a general-purpose modifier widely used at ...

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Abstract

The invention relates to a low-temperature high-molecular resin modifying agent and a method for preparing modified asphalt by utilizing the low-temperature high-molecular resin modifying agent. A main modifying agent SBS is Yueyang petrifaction 4303, the content of the main modifying agent is 3-3.2%, the content of an auxiliary modifying agent SBR is 1.5-2%o through advanced modification treatment, the modifying agent is prepared from a thinner, a cured material, a coupling agent, high molecular resin, rubber powder and plastic powder, the content of the modifying agent is 1.5-2%o, wherein the percentage refers to the mass percentage of matrix asphalt. The asphalt produced by means of the method has the requirements higher than the national I-C standard requirements, and the specific indexes are set as: a softening point is higher than 75 DEG C, the 5 DEG C ductility is greater than 35 cm, the needle penetration of the asphalt 90 # is greater than 70, and the needle penetration of the asphalt 70 # is greater than 55.

Description

technical field [0001] The invention relates to a low-temperature polymer resin modifier and a preparation method of modified asphalt. Background technique [0002] Asphalt in the traditional sense is a colloidal substance composed of resin-wrapped asphaltene molecular groups, which presents a strong oily state (that is, petroleum quality). Colloids are divided into sol (mainly refers to liquid density) and jelly (mainly refers to solid density), depending on the equilibrium state between its components. For bitumen, the equilibrium of the two states depends on the interaction between asphaltenes and resins and is strongly influenced by the external temperature. In fact, the increase of asphalt temperature breaks its jelly state, and the asphalt molecular clusters evolve into a sol state. Therefore, an important characteristic of asphalt is that it is solid or semi-solid at room temperature, but it is very easy to dissolve as the temperature rises. This remarkable heat se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08L9/06
Inventor 吕刚冯海波
Owner 吕刚