The Ranvar B277 is a fast drying
electrical insulating varnish for use up
to180°C.
Uses
- Impregnation of stators, coils and
transformers
Cured Properties
The Ranvar B277 can be baked at
110°C to accelerate the dry time. It has
excellent moisture resistance.
Recommended Cure
1 – 2 hours at 25°C (77 °F)
–OR-
30 minutes at 110°C (230°F)
Features and Benefits
- Low viscosity
- Can be thinned with low cost solvents
- Offers thermal ratings from 130° C to
180° C
- Fast drying
Application Methods
- Dip and Bake
-
Storage/Shelf Life
This resin should be stored at a 25°C
(77°F) in a dry controlled environment
out of direct sunlight. This material
should be suitable for use stored under
these conditions in the original sealed
containers for twelve (12) months from
the date of shipment.
Properties of Material Supplied
Test Value Units
Viscosity @ 25°C (77°F)
(ASTM D2196)
400 – 800 Cp
Percent non-volatile matter
(ASTM D115)
49 – 51 %
Flash Point (ASTM D93) 27 (81) °C (°F)
A member of
Ranvar B277Air Dry Insulating Varnish November 2, 2007 Rev.1
TYPICAL PROPERTIES
Test Value Units
Typical Dry Time @ 25°C (77°F) 20 Minutes
Recommended Thinner Xylol
Electrical Properties – Dried 24 hours at 25°C (77°F)
Test Value Units
Dielectric Strength – AS MADE
(ASTM D149)
2200 Volts/mil
Dielectric Strength after 24 hours in
water (ASTM D149)
1800 Volts/mil
Film thickness 2 mils
UL Recognized Insulation Systems (E52215)
Class Systems
Class 130 MEGA I
Class 155 B2
Class 180 MEGA III |
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