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Fast-reacting aliphatic amine-based curing agent for ambient and elevated temperature cure profiles.
Excellent compatibility with standard epoxy resins, enabling uniform crosslinking without phase separation.
Low viscosity (200–300 mPa·s at 25°C) ensures easy metering, mixing, and improved wetting of fillers and reinforcements.
Low volatility and negligible vapor pressure enhance workplace safety and reduce VOC emissions during processing.
Delivers high glass transition temperature (Tg > 120°C) and superior chemical resistance in cured epoxy systems.
Structural adhesives for aerospace composite bonding and metal-to-composite joining.
High-performance electrical encapsulants and potting compounds for power electronics and EV battery modules.
Wind turbine blade adhesive systems requiring rapid green strength and long-term durability under cyclic loading.
Industrial flooring and protective coatings where rapid return-to-service and abrasion resistance are critical.
Prepreg tackifiers and resin infusion matrices for carbon fiber reinforced polymer (CFRP) manufacturing.
| Chemical Type | Aliphatic polyamine adduct |
| Product Form | Liquid |
| Appearance | Pale yellow to amber clear liquid |
| Density (25°C) | 0.92–0.95 g/cm³ |
| Viscosity (25°C) | 200–300 mPa·s |
| Amine Value | 380–420 mg KOH/g |
| Primary Applications | Epoxy resin curing for structural composites, adhesives, and encapsulants |
| Key Features | Ambient-cure capable, low blush tendency, hydrolytic stability |
Q1: What types of resin systems is DX-75B compatible with?
A: DX-75B is specifically formulated for use with epoxy resins, including both liquid and solid bisphenol-A and bisphenol-F types. It demonstrates good compatibility with modified epoxies such as cycloaliphatic and novolac-based systems, though performance should be verified experimentally for each formulation.
Q2: How does temperature affect the curing profile when using DX-75B?
A: DX-75B enables flexible cure scheduling: it supports ambient-temperature curing for extended pot life or accelerated thermal curing at elevated temperatures (typically 60–120 °C), resulting in improved crosslink density and final mechanical properties. Cure speed and gel time are highly dependent on substrate, film thickness, and ambient conditions.
Q3: What is the recommended dosage range for DX-75B in epoxy formulations?
A: Dosage depends on the specific epoxy resin, desired cure schedule, and end-use performance requirements. DX-75B is typically used at low concentrations—generally ranging from 0.1% to 2% by weight relative to the resin—and should be optimized through small-scale trials.
Q4: Does DX-75B require special handling or storage conditions?
A: Yes—DX-75B should be stored in tightly sealed containers under dry, cool conditions (preferably below 25 °C) and protected from moisture and direct sunlight. Prolonged exposure to humidity may affect reactivity and shelf life. Standard industrial PPE (gloves, eye protection, ventilation) is recommended during handling.
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