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Low-viscosity liquid polyamide offering excellent compatibility with standard epoxy resins.
Provides balanced pot life and rapid ambient-cure performance for efficient production workflows.
Delivers superior flexibility, impact resistance, and adhesion to diverse substrates including metals and concrete.
Low odor and low volatile organic compound (VOC) content, supporting safer handling and regulatory compliance.
Enhanced chemical resistance—particularly to alkalis, salts, and mild solvents—ideal for protective coatings.
Industrial maintenance coatings for steel structures and offshore platforms.
Concrete floor coatings in warehouses, factories, and parking facilities.
Electrical insulation systems for transformers and encapsulated electronic components.
Marine antifouling and corrosion-protection primers for hulls and ballast tanks.
Adhesives and sealants requiring toughness and environmental durability.
| Chemical Type | Polyamide adduct |
| Product Form | Liquid |
| Appearance | Amber to light brown transparent liquid |
| Viscosity (25°C) | 1,200–1,800 mPa·s |
| Amine Value | 320–360 mg KOH/g |
| Specific Gravity (25°C) | 0.96–0.99 g/cm³ |
| Flash Point (Cleveland Open Cup) | ≥180°C |
| Storage Stability | Stable for 12 months at 5–30°C in sealed containers |
Q1: What is the primary function of ADEKA Polyamide Curing Agent 640H in epoxy systems?
A: ADEKA Polyamide Curing Agent 640H functions as a low-viscosity, flexible polyamide-based hardener for epoxy resins, enabling ambient- or low-temperature cure while delivering good chemical resistance, adhesion to various substrates, and toughness in the final cured film.
Q2: Is ADEKA 640H suitable for coatings requiring food-contact compliance?
A: ADEKA Polyamide Curing Agent 640H is formulated for industrial protective coatings and general-purpose applications. It is not pre-qualified for food-contact use under major regulatory frameworks; end-use compliance must be verified through full formulation testing and regulatory assessment by the coating manufacturer.
Q3: How does 640H compare to conventional polyamide hardeners in terms of handling and pot life?
A: Due to its lower viscosity and optimized molecular structure, 640H offers improved mixability with epoxy resins and generally provides extended working time (pot life) at ambient temperatures compared to many standard polyamide curing agents—especially in formulations with moderate epoxy equivalents.
Q4: Can ADEKA 640H be used in high-solids or solvent-free epoxy systems?
A: Yes, its low volatility and compatibility with common epoxy resins make ADEKA 640H well-suited for high-solids and solvent-free formulations, supporting reduced VOC emissions without compromising cure performance or film integrity.
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