Dymax Multi-Cure 9-20351-UR cures upon exposure to light and is designed for rapid conformal coating of printed circuit boards and other electronic assemblies. This coating has been engineered for application thicknesses between 50 mic [0.002 in] and 0.51 mm [0.020 in]. The low modulus of 9-20351-UR allows it to excel in thick coating applications where thermal shock performance is critical. When exposed to black light, Ultra-Red fluorescing emits a bright red color, providing a vivid contrast on components and solder masks. Dymax 9-20351-UR is a Multi-Cure material specially formulated to cure with heat in applications where shadowed areas exist. 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
- Ultra-Red Fluorescing
- Secondary Heat Cure
- Isocyanate Free
- Low VOC
- One Part, No Mixing Required
- High Viscosity for Selective Application of Thick Coating
- Optimized for Wetting High-Profile Leads
- Suitable for Spraying
SPECIFICATION:
| UNCURED PROPERTIES * | ||
| Property | Value | Test Method |
| Solvent Content | No Nonreactive Solvents | N/A |
| Chemical Class | Acrylated Urethane | N/A |
| Appearance | Colorless Translucent Gel | N/A |
| Soluble in | Organic Solvents | N/A |
| Density, g/ml | 1.05 | ASTM D1875 |
| Viscosity, cP (20 rpm) | 13,500 | ASTM D2556 |
| CURED MECHANICAL PROPERTIES * | ||
| Property | Value | Test Method |
| Durometer Hardness | D60 | ASTM D2240 |
| Tensile at Break, MPa [psi] | 13.7 [2000] | ASTM D638 |
| Elongation at Break, % | 200 | ASTM D638 |
| Modulus of Elasticity, MPa [psi] | 30.3 [4,400] | ASTM D638 |
| Glass Transition, Tg | 43 | DSTM 256‡ |
| CTEa1, mm/m/˚C | 82 | DSTM 610 |
| CTEa2, mm/m/˚C | 221 | DSTM 610 |