1、Polyurea: Evolution, synthesis, performance, modification, and future

Comprehensive review of polyurea, covering history, synthesis, performance, modification and future prospects. Focuses on mechanisms for synthesis, main performance and modification methods. Provides insights into polyurea systems, key mechanisms and future research directions.

2、Enabling the Epoxy

Based on our previous research on the hindered urea bonds (HUBs), herein, we incorporated HUBs with isocyanates into the traditional epoxy network, synthesizing epoxy-based polyurea, namely, EHTPUs.

3、Preparation and properties of siloxane modified polyurea materials

The modified polyurea exhibited outstanding water resistance (1.52% absorption after 7 days; 95.87% tensile/94.94% elongation retention) and enhanced cement mortar adhesion (4.5 MPa). Thermal stability improved significantly, with TGA showing delayed degradation onset.

4、Preparation and properties of siloxane modified polyurea

This work aimed to enhance polyurea’s mechanical properties, water resistance, and substrate adhesion through siloxane modification.

Development and Performance Analysis of a Modified Polyurea

To overcome the shortcomings of traditional concrete coatings, such as high roughness and poor frost resistance, this study developed and evaluated a new hydrophobic coating—modified polyurea hydrophobic coating (MPHC). MPHC features strong adhesion, high hydrophobicity and excellent durability.

SILICATE MODIFIED POLYUREA INJECTION RESIN

Our TamPur 116/T is a two-component, low viscosity, 1:1 ratio resin that reacts to form a non-expansive, solid compound that gains considerable adhesive, compressive and tensile strength within minutes.

Jing Wang, Jihu Wang * , Song Wang, Shaoguo Wen, Kaimin Chen , Chen Xie

The hydroxyl groups of COPNA resin reacted with the epoxy groups to increase the crosslinking density, so the heat resistance and adhesion of COPNA resin were enhanced.

Compatibility between polyurea resin modifier and asphalt

The new resin-modified material is spray PUA resin, which is a polyurethane resin containing urethane bond and urea bond functional groups. After curing, it has high wear resistance, adhesion, flexibility, high peel strength, and excellent weather resistance.

Hydrogen and DA bond

PUE-FD was prepared by in situ polymerization of functionalized reduced graphene oxide and 2-octyl-4,5-dichloroisothiazolinone introduced into a polyurea-epoxy resin system with DA cross-linking. PUE-FD exhibited excellent resistance to cavitation. PUE-FD had outstanding anticorrosion function.

The Latest Advances in Mechanically Robust Self‐Healing Polyurea Based

Solving the contradiction between strength, toughness, and self‐healing properties is extremely important to realize the breakthrough of polyurea applications.

In the field of modern material science, modified polyurea resins have garnered significant attention as high-performance polymer materials due to their unique chemical structures, excellent physical properties, and broad application prospects. Not only do these resins retain the waterproofing and anticorrosive characteristics of traditional polyurea resins, but they also undergo various chemical or physical modifications to adapt to more demanding usage conditions and enhance their performance. This article introduces the basic concepts, classifications, applications, and future development trends of modified polyurea resins.

I. Basic Concepts and Properties

Modified polyurea resins are high-elasticity, high-strength polymer materials formed by reacting isocyanate groups (-NCO) with other compounds to create a polyurethane prepolymer, which is then chain-extended and cross-linked with polyols. They exhibit superior weather resistance, UV resistance, wear resistance, flexibility, adhesion, and chemical corrosion resistance. These properties make them widely used in construction waterproofing, anticorrosion, wear-resistant flooring, and waterproof membranes.

II. Modification Techniques

1. Chemical Reaction Modification By adjusting the reaction ratio of isocyanate groups to polyols or introducing other functional groups, the molecular weight and chemical structure of the polymer can be regulated to improve its performance. For example, increasing the polyol ratio enhances flexibility, while incorporating urethane groups boosts UV resistance.

2. Physical Modification Physical modifications optimize performance by altering the microstructure and morphology of the polymer. For instance, melt extrusion methods can control crystallinity and microcrystal size, influencing mechanical and thermal properties. Adding nano-fillers or using specialized processing equipment can also significantly enhance the resin’s performance.

3. Functionalization Modification Functionalization imparts specific properties to polyurea resins for targeted applications. For example, blending polyurea resins with high-performance fibers like carbon or glass creates composites with both excellent mechanical and electrical properties.

III. Application Fields

Due to their exceptional performance, modified polyurea resins are widely employed in diverse areas:

• Construction Waterproofing: Forms seamless, durable waterproof layers to prevent water penetration.
• Anticorrosion: Ideal for chemical equipment and pipelines due to superior chemical resistance.
• Wear-Resistant Flooring: Provides high-wear, easy-to-clean surface materials.
• Waterproof Membranes: Manufactured into membranes with excellent tensile strength and elongation to resist environmental erosion.

IV. Future Development Trends

As technology advances and market demands evolve, modified polyurea resins will trend toward higher performance, broader applications, and greater environmental friendliness. On one hand, further research may enable more functionalized modifications to meet specialized needs. On the other hand, environmental standards will prioritize low-VOC emissions and biodegradability, drawing increased attention to eco-friendly formulations.

modified polyurea resins, as high-performance polymer materials, will continue to play a vital role in future development. Through ongoing technological innovation and expanded applications, they are poised to deliver greater value and convenience to society.