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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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