Overview
LC3320 is a two-component epoxy adhesive renowned for its exceptional bonding strength and durability across diverse industrial applications. Developed for high-performance bonding requirements, it cures at room temperature to form rigid, chemically resistant joints. The adhesive is particularly valued in manufacturing sectors for its ability to bond dissimilar materials, including metals, ceramics, and most engineering plastics. Its formulation balances working time (typically 20-30 minutes) with rapid strength development, making it suitable for both precision assembly and large-scale production.
Physical and Chemical Properties
LC3320 exhibits a viscosity of approximately 12,000-15,000 cP in its uncured state, allowing for easy application while minimizing drips. The cured adhesive demonstrates tensile shear strength exceeding 25 MPa on steel substrates and maintains performance from -40°C to +120°C. Chemically, the cured resin displays excellent resistance to oils, fuels, and mild acids/alkalis. Its thermal expansion coefficient closely matches that of common metals (≈50-60 × 10⁻⁶/°C), reducing stress at bonded interfaces during temperature fluctuations.
Main Applications
In automotive manufacturing, LC3320 is extensively used for bonding brake components, transmission housings, and sensor mounts due to its vibration damping properties. The electronics industry employs it for potting fragile components and securing connectors where soldering isn't feasible. Industrial equipment manufacturers utilize LC3320 for assembling hydraulic systems and repairing worn machinery parts. Its gap-filling capability (up to 0.5mm) makes it ideal for compensating minor surface irregularities in metal fabrication.
Safety and Storage
Proper handling requires nitrile gloves and eye protection, as uncured resin can cause skin irritation. Work areas should have adequate ventilation to prevent inhalation of amine-based hardener vapors, which may trigger respiratory sensitization in prolonged exposures. Storage stability is maximized when kept in original, moisture-proof containers at stable temperatures. Partial curing may occur if exposed to high humidity. Frozen storage (-18°C) can extend shelf life but requires gradual warming to room temperature before use to prevent condensation.
B2B Procurement Guide
Industrial buyers should specify required certifications (e.g., ISO 10993 for medical applications or UL recognition for electronics). Bulk purchases (200kg+) often qualify for 15-20% discounts, though minimum order quantities apply. Technical datasheets should be cross-verified for batch-to-batch consistency in cure speed and bond strength. Reliable suppliers typically provide application support, including surface preparation guidelines and mixing ratio controllers for large-volume dispensing systems.
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