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Low-viscosity, solvent-free amine adduct formulation enabling excellent flow and wetting on diverse substrates.
Extended pot life at ambient temperature with rapid cure development upon mild thermal activation (60–80°C).
Exceptional chemical resistance to hydrocarbons, solvents, and alkaline environments in cured epoxy systems.
Low exotherm profile suitable for thick-section casting and large-area coating applications without cracking or blistering.
Meets stringent VOC regulations and contains no intentionally added heavy metals or restricted phthalates.
High-performance industrial flooring and concrete protection systems.
Structural adhesive formulations for aerospace and automotive composites bonding.
Electrical encapsulation and potting compounds requiring thermal stability and dielectric integrity.
Marine and offshore protective coatings exposed to saltwater immersion and UV weathering.
Wind turbine blade bonding and repair matrices demanding fatigue resistance and low moisture uptake.
| Chemical Type | Amine adduct (polyoxyalkylene-modified aliphatic amine) |
| Product Form | Liquid |
| Appearance | Clear, pale yellow to amber viscous liquid |
| Primary Applications | Epoxy resin curing for coatings, adhesives, and composites |
| Key Features | Low viscosity, extended working time, thermal latency, low odor |
| Benefits | Improved processability, reduced internal stress, enhanced interfacial adhesion |
| Storage Stability | 12 months minimum at 25°C in sealed original container |
| Handling Precautions | Use in well-ventilated areas; wear nitrile gloves and safety goggles |
Q1: What is the primary chemical class of Sunmide 305-70X?
A: Sunmide 305-70X is a modified aliphatic amine-based epoxy curing agent, engineered to provide balanced reactivity, low viscosity, and reduced volatility compared to conventional amines.
Q2: How does Sunmide 305-70X compare to traditional DETA or DEEA in terms of handling and safety?
A: It exhibits significantly lower vapor pressure and reduced skin sensitization potential, making it safer to handle in ambient conditions without requiring specialized ventilation for routine dosing—though standard industrial hygiene practices still apply.
Q3: What types of epoxy resins is Sunmide 305-70X typically compatible with?
A: It is broadly compatible with standard liquid and solid bisphenol-A and bisphenol-F epoxy resins, as well as many novolac and cycloaliphatic epoxies—particularly where improved pot life and controlled exotherm are desired.
Q4: Is Sunmide 305-70X suitable for applications requiring FDA compliance or food-contact approval?
A: Sunmide 305-70X is not pre-approved for direct food-contact use under FDA or EU regulations. Formulators must conduct full regulatory evaluation—including extractables testing and end-use validation—as final compliance depends on the complete cured system, processing conditions, and intended application.
Q5: What is the typical dosage range for Sunmide 305-70X in standard epoxy formulations?
A: Dosage is formulation-dependent but generally ranges from 0.1% to 2% by weight relative to resin solids, with optimal levels determined through stoichiometric adjustment and performance testing for cure speed, hardness, and chemical resistance.
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