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Preparation of High-Performance Polyaspartic Polyurea and Application in Hydraulic Concrete Protection
Weicai Yang1, Junle Su2, Longhui Zhu2
1Institute of Water Conservancy and Hydroelectric Power Research, Beijing 100038, China.
Polymers
|March 14, 2026
Summary
Developing durable polyurea coatings is key for infrastructure protection. A new polyaspartic ester polyurea coating (PAE-PTMEG) shows superior mechanical strength, water resistance, and protection against carbonation and chloride ions.
Area of Science:
- Materials Science
- Polymer Chemistry
- Civil Engineering
Background:
- Hydraulic concrete infrastructure faces degradation from water, carbonation, and chloride ions.
- High-performance protective coatings are essential for extending infrastructure lifespan.
- Polyaspartic ester polyurea coatings offer potential for enhanced durability.
Purpose of the Study:
- To design and evaluate novel polyaspartic ester polyurea coatings for concrete infrastructure protection.
- To investigate the impact of soft segment structure on coating properties.
- To assess the performance of a formulated coating (PAE-C) under various degradation conditions.
Main Methods:
- Synthesis of two polyaspartic ester polyurea coatings (PAE-PTMEG and PAE-PPG) using different soft segments (PTMEG and PPG).
- Characterization of mechanical properties (tensile strength, elongation), water absorption, and curing times.
- Evaluation of the formulated PAE-C coating for waterproofing, chloride ion penetration, carbonation resistance, and frost resistance.
Main Results:
- The PAE-PTMEG coating exhibited higher reactivity and shorter curing times compared to PAE-PPG.
- PAE-PTMEG demonstrated superior mechanical properties (43.8 MPa tensile strength, 646.1% elongation) and excellent water resistance (<1% absorption).
- The formulated PAE-C coating met waterproofing standards and showed exceptional resistance to chloride ion penetration, carbonation, and frost (200 cycles).
Conclusions:
- Tailoring the soft segment structure of polyaspartic ester polyurea is critical for developing durable coatings.
- The PAE-PTMEG coating offers significant potential for protecting water conservancy infrastructure.
- This research provides a pathway for creating advanced protective materials for civil engineering applications.
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