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Highly flexible and impact-resistant cured film with excellent elongation properties.
Outstanding adhesion to diverse substrates including metals, plastics, and treated composites.
Low-VOC formulation compliant with current industrial emission regulations.
Fast ambient-cure capability without requiring heat or catalysts for standard applications.
Good chemical resistance to dilute acids, alkalis, and aliphatic hydrocarbons.
Protective coatings for automotive underbody and chassis components.
Flexible elastomeric sealants and gasketing materials in industrial equipment.
Adhesive primers for composite bonding in wind energy blade manufacturing.
Coating binder for abrasion-resistant rubber-to-metal bonded assemblies.
Base resin for solvent-based and high-solids industrial maintenance coatings.
| Chemical Type | Aliphatic polyurethane dispersion (non-isocyanate pre-reacted) |
| Product Form | Liquid resin (solvent-based, xylene-free) |
| Appearance | Clear to pale yellow viscous liquid |
| Primary Applications | Coatings, sealants, and adhesive binders |
| Key Features | Flexibility, adhesion, low-VOC, ambient cure |
| Recommended Diluent | Aromatic hydrocarbon solvents (e.g., Solvesso™ 100/150) |
| Storage Stability | 12 months at 5–30°C in sealed original container |
| Handling Precaution | Use in well-ventilated area; avoid prolonged skin contact |
Q1: What is the primary function of AL-540C in polyurethane systems?
A: AL-540C is a reactive polyurethane resin designed to serve as a chain extender and crosslinking agent, enhancing mechanical strength, abrasion resistance, and thermal stability in thermoset PU elastomers and coatings.
Q2: Is AL-540C compatible with aromatic and aliphatic isocyanate systems?
A: Yes, AL-540C demonstrates broad compatibility with both aromatic (e.g., MDI, TDI) and aliphatic (e.g., HDI, IPDI) isocyanates, making it suitable for applications requiring UV stability or color retention as well as high-performance structural parts.
Q3: How should AL-540C be stored to maintain its reactivity and shelf life?
A: Store in tightly sealed containers under dry, cool conditions (below 30°C), protected from moisture and direct sunlight. Prolonged exposure to humidity may lead to premature reaction or viscosity increase due to urea formation.
Q4: Can AL-540C be used in solvent-free or low-VOC formulations?
A: Yes — AL-540C is a low-volatility, non-solvent-based resin, enabling its use in 100% solids systems and supporting formulation strategies aligned with evolving environmental and occupational health requirements.
Q5: What processing considerations apply when incorporating AL-540C into casting or RIM applications?
A: Due to its moderate reactivity and viscosity profile, AL-540C supports good flow and mold-filling behavior. Optimal processing typically involves pre-heating components to ensure homogeneous mixing and controlled gel time — exact parameters depend on system design and equipment configuration.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
