Formulation Design and Application of Polyaspartic Polyurea Adhesive

Polyaspartic polyurea is an emerging synthetic material in the polyurea industry, featuring weather resistance, slow reactivity, solvent-free composition, and high mechanical strength. Often termed as the "third generation of polyurea," its two main components are polyaspartic resin and isocyanate curing agents. Currently, this material has gained broad applications in the coatings industry, including coatings for wind turbine blades, construction machinery, roofing, and high-end flooring. We are also exploring its future applications in the adhesive sector.

The adhesiveness of polyaspartic polyurea varies significantly depending on the substrate. For materials like PVC, ABS, iron, wood, stone, and glass, adhesion is relatively straightforward. In contrast, substrates like PP, PE, aluminum, and stainless steel require specialized adhesive formulations to enhance adhesion.

Polyaspartic polyurea is not a specific material but rather a category that encompasses a wide range of performance characteristics. Therefore, it offers high versatility. By selecting different polyaspartic resins and isocyanate curing agents, we can engineer a material to have specialized performance characteristics. Below are some design considerations for formulating polyaspartic polyurea adhesives.

Design Considerations for Polyaspartic Polyurea Adhesive Formulations

The formulation often includes additives like thickeners, substrate wetting agents, adhesion promoters, and pigments. These additives should preferably be incorporated into the resin component and not the curing agent, as the latter is highly reactive and susceptible to moisture absorption, leading to thickening and degradation. It's crucial to avoid additives that introduce amine, hydroxyl, and similar compounds, as they can catalyze the resin and significantly reduce the working time.

Quick Repair Adhesive Applications

In certain situations that require rapid adhesion, the reaction speed of polyaspartic polyurea adhesive is adjustable, with gelling times ranging from one to several minutes. Two design options are available: the first involves high-activity polyaspartic resins like F220 combined with aliphatic isocyanate curing agents such as HDI trimer. The second option utilizes conventional polyaspartic resins like F420 and F520 with high-activity aromatic isocyanate curing agents like MDI and TDI pre-polymers.

Yellowing-Resistant Adhesive Applications

For applications requiring high resistance to yellowing, such as sealants for window sills or adhesives for outdoor LED lighting, resins like F520, F420 are recommended. The curing agent can vary depending on specific mechanical property requirements, with options including conventional trimers, urea condensates, or additives like HDI/IPDI and polyester or polycarbonate diols.

In summary, polyaspartic polyurea offers a wide array of characteristics including solvent-free composition, resistance to yellowing, fast reactivity, and high mechanical strength. It's an excellent alternative for special applications where traditional adhesives like epoxy, polyurethane, and silicone fall short.

Feiyang has been specializing in the production of raw materials for polyaspartic coatings for 30 years and can provide polyaspartic resins, hardeners and coating formulations. Some of our polyaspartic coating formulations: Polyaspartic Coating

Feel free to contact us: marketing@feiyang.com.cn

Our products list:

• Polyaspartic Resin
• Isocyanate Hardener
• Special Chemical

Learn more polyaspartic knowledge: Polyaspartic FAQ

Shenzhen Feiyang Protech Corp., Ltd. specializes in researching and producing polyaspartic polyurea resin and other new chemical products. We are recognized as a "National Special New Key Little Giant" and a "State-level High-tech Enterprise", with more than 50 polyaspartic polyurea invention patents. We also participated in the preparation of 13 industry standards for polyaspartic polyurea materials as a leading company in this field, ranking No.1 in the Chinese market.

In the coating industry, polyaspartic polyurea is used in construction machinery, automobile, containers, fan blades, marine heavy corrosion protection, and high-end industrial and commercial floor coatings. In the adhesive field, it is mainly used in sealants, stone adhesives, electronic adhesives, film circuit packaging adhesives, and other high-end applications. In the waterproofing materials sector, it is primarily used in hydroelectric dams, water parks, building waterproofing repair materials, and other areas. In the structural materials field, it is applied to curling tracks, artificial ice skating rinks, and other structural materials.

Polyaspartic polyurea is considered a high-end new material in the strategy of manufacturing power. We have broken the foreign technology monopoly and filled the domestic market gap. Due to its comprehensive characteristics of "Environmental protection, Energy saving, and Long durability", polyaspartic polyurea can contribute to the realization of genuine carbon neutrality in the coatings, adhesives, and materials industries.

Since 2012, Feiyang polyaspartic ester resin has been supplied overseas. It has been widely used to replace Bayer's current polyaspartic system in many coating companies and has been applied in anti-corrosion and waterproofing by international coating companies.