Asphalt having a high softening point temperature and a method for producing the same

Through the synergistic effect of components such as star-shaped SBS, LDPE, MAH-g-LDPE and fatty acid-PEG ester/silica composite, a high-strength three-dimensional network structure is formed, which solves the problem of asphalt pavement distress under extreme climates, and improves high-temperature stability and durability, making it suitable for high-end pavement projects.

CN120988500BActive Publication Date: 2026-07-21GUANGDONG METALLURGICAL & ARCHITECTURAL DESIGN INST
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Patent Information

Application Number
CN202511433473.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2025-09-29
Filing Date
2025-10-09
Publication Date
2026-07-21
Estimated Expiration
2045-10-09

AI Technical Summary

Technical Problem

Existing asphalt pavements are prone to softening, flowing, and permanent deformation under extreme weather conditions, leading to high-temperature damage and low-temperature cracks. Furthermore, modified asphalt is costly, has complex construction processes, and lacks long-term durability, posing challenges to environmental protection and resource sustainability.

Method used

Using components such as star-shaped SBS, LDPE, MAH-g-LDPE, and fatty acid-PEG ester/silica composite, a high-strength three-dimensional network structure is formed through the synergistic effect of chemical cross-linking and phase change materials, which enhances the high-temperature stability and durability of asphalt. Antioxidants and UV stabilizers are added to improve aging performance.

Benefits of technology

The preparation of asphalt with a high softening point temperature significantly improves high-temperature stability, durability, and overall road performance, making it suitable for high-end road engineering in harsh environments and reducing the cost and construction difficulty of modified asphalt.

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Abstract

The application provides high softening point temperature asphalt and a preparation method thereof, and belongs to the technical field of asphalt materials. Components of the application include asphalt, star-shaped SBS, LDPE, MAH-g-LDPE, fatty acid-PEG ester / silicon dioxide composite and sulfur stabilizer. The application has the advantages that performance is greatly improved through the synergistic effect of multiple components. Star-shaped SBS and LDPE construct a solid polymer network, MAH-g-LDPE acts as a compatibilizer to ensure system stability, and the innovative fatty acid-PEG / silicon dioxide composite has phase change endothermic and nano-enhancing functions, and intelligently delays temperature rise. The network stability is further enhanced by sulfur crosslinking, and the finally obtained asphalt has extremely high softening point, excellent high-temperature stability, durability and comprehensive road performance, and is suitable for high-end road engineering in harsh environments.
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