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Excellent flexibility and impact resistance at low temperatures
Superior abrasion and chemical resistance for demanding industrial environments
Fast room-temperature curing without requiring external heat or catalysts
Low viscosity formulation enabling easy processing by casting, spraying, or roller coating
Good adhesion to diverse substrates including metals, concrete, and composites
Protective coatings for industrial flooring and warehouse surfaces
Encapsulants and potting compounds for electronic components
Flexible linings for tanks, pipes, and concrete containment structures
High-performance sealants and joint fillers in infrastructure projects
Reinforced composite matrices for lightweight structural parts
| Chemical Type | Aromatic polyurethane pre-polymer system |
| Product Form | Two-component liquid (Part A: pre-polymer, Part B: curative) |
| Appearance | Part A: transparent amber liquid; Part B: pale yellow to amber viscous liquid |
| Primary Applications | Protective coatings, encapsulation, lining, and elastomeric bonding |
| Key Features | Low-temperature flexibility, fast ambient cure, solvent-free formulation |
| Benefits | Reduced energy consumption during application, extended service life in aggressive environments |
| Shelf Life (unopened) | 12 months at 15–25°C when stored in original sealed containers |
| Mix Ratio (A:B) | By weight: 100 : 12 ± 1 |
Q1: What is the primary function of Arakawa AL-500 in polyurethane systems?
A: Arakawa AL-500 is a reactive polyurethane resin designed to serve as a chain extender and crosslinking agent, enhancing mechanical strength, abrasion resistance, and thermal stability in thermosetting PU formulations.
Q2: Is AL-500 suitable for solvent-free or high-solids polyurethane coatings?
A: Yes — AL-500 is formulated for compatibility with low-VOC and solvent-free PU systems. Its low volatility and controlled reactivity support stable processing in high-solids coatings, adhesives, and elastomer applications.
Q3: How does AL-500 compare to conventional diamine chain extenders in terms of pot life and cure profile?
A: Compared to fast-reacting aromatic diamines, AL-500 offers extended pot life and more controllable gelation, enabling improved processing window for casting, RIM, and spray applications without sacrificing final crosslink density.
Q4: Can AL-500 be used in flexible polyurethane elastomers?
A: Yes — when balanced with soft segments and other polyols, AL-500 contributes to tunable hardness and resilience in thermoplastic and thermoset elastomers, supporting both high-tensile and impact-absorbing performance profiles.
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E-mail: wangxingqiang@ericwchem.com
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