Multi-Cure 984-LVUF is a highly fluorescing, single-component, 100%-solids conformal coating specifically formulated for rapid room-temperature cure when exposed to UV light. 984-LVUF retains high fluorescence after curing. Thin-layer coatings cure almost instantly to a depth of 7 mils and fluoresce upon exposure to “black” light. Multi-Cure 984-LVUF also exhibits adhesion to a variety of metal, ceramic, and glass-filled epoxy surfaces. 984-LVUF is a moderately low-viscosity coating which can be cured by exposure to UV light and secondarily cured with heat for shadowed areas on densely populated circuit boards. Dymax Multi-Cure materials contain no nonreactive solvents and cure upon exposure to light. Their ability to cure in seconds enables faster processing, greater output, and lower processing costs. When cured with Dymax light-curing spot lamps, focused-beam lamps, or flood lamps, they deliver optimum speed and performance for conformal coating. Dymax lamps offer the ideal balance of UV and visible light for the fastest, deepest cures. This product is in full compliance with the RoHS2 directives 2015/863/EU and 2011/65/EU.
Features:
- UV/Visible Light Cure
- MIL-I-46058C Listed
- Secondary Heat Cure
- IPC-CC-830-B Approved
- Solvent Free
- UL 746C Qualified
- One Part, No Mixing or Dilution Required
- UL 94V-0 Recognized
- Flexible for Enhanced Thermal Shock Performance
SPECIFICATION:
| UNCURED PROPERTIES * | ||
| Property | Value | Test Method |
| Solvent Content | No Nonreactive Solvents | N/A |
| Chemical Class | Acrylated Urethane | N/A |
| Appearance | Colorless Transparent Liquid | N/A |
| Soluble in | Organic Solvents | N/A |
| Density, g/ml | 1.14 | ASTM D1875 |
| Viscosity, cP (20 rpm) | 160 | ASTM D1084 |
| CURED MECHANICAL PROPERTIES * | ||
| Property | Value | Test Method |
| Durometer Hardness | D85 | ASTM D2240 |
| Tensile at Break, MPa [psi] | 55.8 [8100] | ASTM D638 |
| Elongation at Break, % | 4.0 | ASTM D638 |
| Modulus of Elasticity, MPa [psi] | 724 [105,100] | ASTM D638 |
| Glass Transition Tg, ˚C | 84 | DSTM 256‡ |
| CTEa1, mm/m/˚C | 70 | DSTM 610‡ |
| CTEa2, mm/m/˚C | 227 | DSTM 610‡ |