PU potting resin R-381-8

1.Good manufacturability & insulation property
2.low shrinkage
3.shining appearance of condensate
4.excellent crack resistace
R-381-8 Polyurethane potting compound made from polyurethane resin, hardener and filler presented in two-component form.
R-381-8 cures at room temperature. Heat resisting classification is B.It has gained UL certification (E229550).
Features
Applications/Use
potting electronic components, motor and apparatus coils. For example: small transformer, instrument transformer coils, capacitor, ignition coils of autocycle and auto etc.

Technical Data
Properties
Testing condition
Unit
standard values
Appearance
Part A
Test tube method

Pasty liquid
Part B
Brown and transparent liquid, no mechanical impurities
Viscosity
Part A
rotation method
cps
4000±500
Part B
500±50
Shore hardness
Shore D
D
≥70
Volume Resistivity
At room temperature
Ω.m
≥1×10
13
Immersion in water
≥1×10
12
Dielectric strength
at room temperature
KV/mm
≥20
Pot life
23±2
h
≥1

2. It can be stored for at least 3 months at 25 in dry and cool room.