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Low-viscosity liquid formulation enabling excellent flow and wetting on complex substrates.
Room-temperature curing capability with balanced pot life and rapid development of mechanical strength.
High thermal stability and superior chemical resistance after full cure, especially to alkalis and solvents.
Low exotherm profile suitable for thick-section casting and sensitive electronic encapsulation.
Compatible with standard DGEBA-type epoxy resins without requiring catalysts or accelerators.
Electrical & electronics encapsulation and potting for transformers, sensors, and PCBs.
Structural adhesives for automotive and aerospace composite bonding.
High-performance flooring and industrial coating systems.
Wind turbine blade bonding and repair formulations.
Marine-grade protective coatings for hulls and offshore infrastructure.
| Chemical Type | Amine-based aliphatic polyamine adduct |
| Product Form | Clear to pale yellow liquid |
| Appearance | Homogeneous, low-viscosity liquid at 25°C |
| Density (25°C) | ~0.92–0.95 g/cm³ |
| Viscosity (25°C) | 250–450 mPa·s |
| Amine Value | 380–420 mg KOH/g |
| Reactivity Profile | Medium reactivity; gel time ~60–90 min at 25°C with DGEBA resin (1:1 ratio) |
| Storage Stability | 12 months in original sealed container at <25°C, protected from moisture |
Q1: What is the primary chemical class and functional mechanism of SM2042G?
A: SM2042G is an amine-functionalized epoxy curing agent, designed to react with epoxide groups via nucleophilic addition. It functions as a latent or semi-latent hardener, offering controlled reactivity at ambient temperatures with accelerated cure upon mild thermal activation.
Q2: How does SM2042G compare to conventional aliphatic amines in terms of pot life and film properties?
A: Compared to highly reactive aliphatic amines, SM2042G provides significantly extended pot life—often several hours at room temperature—while still delivering excellent crosslink density, chemical resistance, and mechanical toughness in the cured film after thermal post-cure.
Q3: Is SM2042G suitable for high-solids or solvent-free epoxy formulations?
A: Yes, SM2042G is formulated to be compatible with low-viscosity, high-solids, and 100% solids epoxy systems. Its low volatility and favorable mixing characteristics support homogeneous blending without excessive viscosity build-up during storage or processing.
Q4: What are typical handling and storage recommendations for this curing agent?
A: Store in tightly sealed original containers under dry, cool conditions (below 30°C) and protected from moisture and direct sunlight. Avoid prolonged exposure to humid environments, as amine functionality may absorb atmospheric water and affect reactivity or appearance.
Q5: Can SM2042G be used in combination with other hardeners or accelerators?
A: Yes, SM2042G is often blended with complementary hardeners—such as aromatic amines or dicyandiamide—to fine-tune cure profile, glass transition temperature, or flexibility. Compatibility and performance should be verified experimentally for each specific formulation.
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E-mail: wangxingqiang@ericwchem.com
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