Coating for Busbar by Electrostatic Spray Application
Product Description
MT-EL-HLF59R is a one part, 100 % solids, epoxy powder coating for insulation of wire and busbars. Designed for electrostatic spray application it has excellent resistance against heat, chemicals and moisture. The coating has a good edge coverage and flexibility. It is serviceable up to 130° C.
Powder Properties
| Typical value | Method | |
| Binder System | Epoxy resin | |
| Density | 1.75 – 1.85 g/cm³ | ISO 8130-2 |
| Gel time at 200° C | 30 – 50 sec. | modified ISO 8130-6 |
| Storage stability | 6 months from date of manufacture at ≤ 23° C | |
Application Data
| Preheating temperature | 190 – 235° C object temperature | |
| Post cure conditions | 5 – 10 min. at above temperature | |
| Particle size distribution | < 32 µm = 25 – 40 % < 160 µm > 99.5 % | Malvern ISO 8130-1 |
Material Properties
| Color | grey, ca. RAL 7047 | |
| Recommended film thickness | 200 – 300 µm | |
| Flow | smooth | |
| Gloss at 60° angle | 40 – 60 units | ISO 2813 |
| Cross cut | Gt 0 | DIN EN ISO 2409 |
| Impact resistance | > 5 Joule | DIN 3476-1 |
| Elongation | > 5 % | DIN 3476-1 |
| Hardness | > 100 | DIN EN ISO 2815 |
| Pencil hardness | 5 H | DIN EN 13523-4 |
| Glass transition temperature | 65 ± 7° C (Tg1)
112 ± 5° C (Tg2) 40 – 60 J/g (Delta H) |
ISO 11357-2 Inflection point Inflection point |
| Temperature index | 130° C (Class B) | IEC 60216-1 |
| Water absorption
(40 h / 23° C) |
< 1 % | ASTM D 570 |
| Thermal conductivity | 0.4 – 0.5 W/(m·K) | DIN EN 821 |
Typical Electrical Properties
| Specific surface resistivity | > 1013 Ω | IEC 60093 |
| Dielectric strength | 45 kV/mm | IEC 60243-1 |
| Dissipation factor tan δ, 25° C
Dissipation factor tan δ, 105° C |
< 0.01
< 0.01 |
ASTM D 150
ASTM D 150 |
| Dielectric constant (100 Hz – 1 MHZ) | 4.0 | ASTM D 149 |
| Comparative tracking index (CTI) | CTI 600 / CTI 175M-1.1 | IEC 60112 |
| UL 94 Vertical Burning Test | V-0 | IEC |
| Hot wire ignition (HWI) | ≥ 120 sec. | IEC 60695-2-20 |
| High current arc ignition (HAI) | ≥ 150 | UL 746A Section 32 |
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