Polyisobutylene modified building asphalt and preparation method thereof

Abstract

The invention relates to a polyisobutylene modified building asphalt and a preparation method thereof. According to the technical solution, the building asphalt comprises the following components in parts by weight: 100 parts of base asphalt, 10-30 parts of epoxidized polyisobutylene, 5-10 parts of reinforcing fibers, 50-80 parts of inorganic filler, 0.5-3 parts of a silane coupling agent, and 0.5-2 parts of an anti-aging agent. The epoxidized polyisobutylene can modify lignin, and the inorganic filler can significantly improve the compatibility, thereby increasing the thermal storage stability of the modified asphalt; meanwhile, the polyisobutylene is used to toughen the asphalt, thereby significantly improving the high and low temperature resistance of the asphalt and solving the problemof high brittleness; and the polyisobutylene has good hydrophobic property, weather resistance and the like, and can significantly improve the weather resistance and the like of the asphalt.

Description

technical field [0001] The invention belongs to the technical field of organic polymer composite materials, and in particular relates to a polyisobutylene modified building asphalt and a preparation method thereof. Background technique [0002] Petroleum asphalt has good thermoplasticity, adhesion, and viscoelasticity, and is the basic material for building waterproofing projects. However, due to its strong sensitivity to temperature, it is easy to flow at high temperatures, brittle at low temperatures, and easy to crack. It has low strength and poor elasticity. 1. Only adopting asphalt as a building waterproof material cannot meet the requirements of the current building. [0003] At present, a lot of reports have been made on the modification of asphalt, the most commonly used is to use polymer modifiers such as thermoplastic elastomers such as SBS and SBR, although these polymer modifiers can modify the asphalt in some aspects. However, the blending system of these polym...

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Problems solved by technology

[0002] Petroleum asphalt has good thermoplasticity, adhesion, and viscoelasticity, and is the basic material for building waterproofing projects. However, due to its strong sensitivity to temperature, it is easy to flow at high temperatures, brittle at low temperatures, and easy to crack. It has low strength and poor elasticity. 、Using only asphalt as a building waterproof material cannot meet the requirements of the current building

[0003] At present, a lot of reports have been made on the modification of asphalt, the most commonly used is to use polymer modifiers such as thermoplastic elastomers such as SBS and SBR, although these polymer modifiers can modify the asphalt in some aspects. However, the blending system of these polymers and base asphalt is often thermodynamically unstable and prone to segregation, resulting in unsatisfactory performance of the product during use, and the polymer modifier is expensive. The production process Complexity, serious energy consumption, resulting in high cost of prepared modified asphalt

[0004] A large amount of inorganic fillers are often added to construction asphalt to enhance the strength of asphalt. However, these inorganic fillers are inert seasonings and are often incompatible with asphalt. Under long-term standing conditions, it is easy to cause segregation of inorganic fillers and asphalt, resulting in the prepared asphalt Poor product storage stability and other issues

For example, the patent CN1935903A discloses a modified asphalt, adding a large amount of zinc borate, antimony trioxide, magnesium hydroxide, aluminum hydroxide and other fillers, which can easily lead to segregation of inorganic fillers in the asphalt, resulting in poor storage stability The problem

CN1935902A discloses a kind of modified asphalt, adding a large amount of inorganic fillers, through the high-speed shearing process, resulting in a long process time and increasing production costs, even so, long-term thermal storage hydrogen will also appear segregation phenomenon, resulting in unstable thermal storage stability it is good

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