LOCTITE STYCAST 4640 is an RTV condensation-cure silicone rubber syntactic foam designed for airborne potting, sealing, and caulking applications requiring low weight and excellent dielectric properties. It is a two-component, lightweight, and temperature-resistant material with a room-temperature cure capability.
| Property | LOCTITE STYCAST 4640 | LOCTITE CAT 50 AMB |
|---|---|---|
| Brookfield Viscosity (mPa·s) | 45,000 | 85 |
| Density (g/cm³) | 0.75 | – |
| Shelf Life (@18-25°C, days) | 180 | – |
| Property | LOCTITE STYCAST 4640 + CAT 50 AMB | LOCTITE STYCAST 4640 + CAT 50-2 AMB |
|---|---|---|
| Brookfield Viscosity (mPa·s) | 45,000 | 45,000 |
| Density (g/cm³) | 0.75 | – |
| Work Life @ 25°C (minutes) | 60 | – |
| Cure Schedule | LOCTITE STYCAST 4640 + CAT 50 AMB |
|---|---|
| Room Temperature Cure | 16-24 hours @ 25°C |
| Heat Cure | 2-4 hours @ 65°C |
| Post Cure (if above 125°C expected) | 1-2 hours @ incremental 25-30°C steps |
| Property | LOCTITE STYCAST 4640 + CAT 50 AMB | LOCTITE STYCAST 4640 + CAT 50-2 AMB |
|---|---|---|
| Hardness (Shore A) | 70 | 64 |
| Elongation (%) | 135 | 51 |
| Water Absorption (24-hr boil, %) | <0.1 | – |
| Glass Transition Temperature (°C) | – | ≤50 |
| Coefficient of Thermal Expansion (µm/m·°C) | – | 193 |
| Property | LOCTITE STYCAST 4640 + CAT 50 AMB | LOCTITE STYCAST 4640 + CAT 50-2 AMB |
|---|---|---|
| Volume Resistivity (ohms·cm) | >1×10¹⁴ | – |
| Dielectric Strength (V/mil) | 250 | – |
| Dielectric Constant / Dissipation Factor | 2.0 / 0.004 (@1 MHz) | 3.2 / 0.266 (@50 Hz), 2.3 / 0.086 (@1 kHz), 2.1 / 0.005 (@1 MHz) |
| Property | LOCTITE STYCAST 4640 + CAT 50 AMB | LOCTITE STYCAST 4640 + CAT 50-2 AMB |
|---|---|---|
| Tensile Strength (N/mm² / psi) | 1.4 / 200 | 1.96 / 284 |
| Tear Strength (kgf/cm) | – | 1,030 |
LOCTITE ECCOBOND UF 9000AG-061 is specifically formulated for FCBGA and Cu pillar flip chip packaging, ensuring robust solder joint encapsulation under extreme electrothermal cycling from -65 °C to 150 °C. Its superior capillary flow also optimizes throughput in automated assembly lines for high-density ICs.
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LOCTITE® ABLESTIK NCA 3218 is specifically formulated for ADAS optical modules, ensuring secure bonding in lens barrel to housing and lens housing to circuit board interfaces where dimensional accuracy and dielectric integrity are non negotiable.
Loctite® 3296, a dual cure (UV & thermal) adhesive, is engineered for active alignment assembly of ADAS cameras and LiDAR modules. Its optimized bonding to aluminum and FR4 substrates ensures secure fixation of optical components while enabling nanometer level alignment critical for high resolution imaging.
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