WCC-87 FLAME RETARDANT
EPOXY RESIN CASTING COMPOUND
WCC-87
flame retardant epoxy resin casting compound
is a new specific chemical industrial
materials for capacitor,composed of
composite low viscosity epoxy resin as base
resin,is added various modifiers.It has
excellent operative processing
properties,meeting the requirements of
casting metallized film capacitor and other
small part and component by
domestic,hand-made,and import equipment.Its
main properties indexes can reach the
properties indexes of EX 661(Sanyou resin
Co.,Ltd) and XN 1226(Ciba Co.,Ltd).
This compound has the
following characteristics:
⑴Excellent processing properties,low
viscosity.
⑵Long pot life.At 35℃,35g compounds(A+B),the
duration of time finishing the mixing to the
viscosity becoming twice as much as
origin—Pot life is more than 3.5hr.
⑶Low curing temperature,bright surface.
⑷Good mechanical,electrical,and thermal
properties.
⑸Low toxicity.
⑹Good flame resistance,in keeping with the
technical requirements stated in UL-94 on
V-1 grade.
⑺Two—package compound ,facilities for
use,long shelf life.
1.Liquid characterstics before curing
Table 1
|
No. |
Item |
Indexes |
|
1 |
Appearance |
A |
Pure black viscous liquid |
|
B |
Yellow-brown liquid |
|
A+B |
Black viscous liquid |
|
2 |
Viscosity(40℃,mPa.s) |
A |
4000-10000 |
|
B |
25-45 |
|
A+B |
400-1000 |
|
3 |
Density(25℃,g/cm3) |
A |
1.60-1.70 |
|
B |
1.19-1.21 |
|
A+B |
1.30-1.60 |
|
4 |
Gelation time(150℃,S) |
(A+B)* |
140 |
*(A+B):
A:B=100:30(W/W)
2.Cured product
characteristics Table 2
|
No. |
Item |
Index |
|
1 |
Water
absorption (23℃,24 hr,%) |
≤0.18 |
|
2 |
Flexural
strength(Mpa) |
≥65 |
|
3 |
Volume
resistivity(25℃ ohm-m) |
≥1013 |
|
4 |
Surface
resistivity(25℃,ohm) |
≥1013 |
|
5 |
Dielectric
strength(23℃,KV/mm) |
≥20 |
|
6 |
Dielectric
constant(25℃,1mHz) |
≤4.3 |
|
7 |
Volume
shrinkage(%) |
≤1 |
|
8 |
Dissipation
factor(25℃,1mHz,%) |
≤2 |
|
9 |
Coefficient of linear
expansion(1/℃) |
≤60×10-6 |
|
10 |
Glass transition temperature(℃) |
≥80 |
|
11 |
Flame
resistance |
FV-1 |
3.The
technological curve for WCC-87 flame
retardant epoxy resin casting compound.
⑴The relationship between temperature
and viscosity of major agent.
⑵The
viscosisty curve for mixture of major
agent and curing agent at 25℃.
⑶The
reactionary exothermal peak curve for
mixture of major agent and curing
agent.(100g)
4.Usage
process
⑴Before using,major agent is heated to
55℃,sufficiently stirred,in order that
partial precipitate is dispersed into resin.
⑵Vacuum deaerate for 1h to remove bubble.
⑶Casting:Adjust the measure to
appropriate,as soon as perform the casting
operation.
⑷Curing:Curring carry out under given curing
condition,open fan for heater,to internal
temperature is homogeneous.
5.Application note
⑴After every time usage operation finish,all
appliance should be cleaned using acetone or
alcohol,which contacted with resin.
⑵Remainder in using major agent and curing
agent(not mixed) should closely lidded with
cover.
⑶Operation environment should pay attention
to keep dry and ventilate.
This product is a non-flammable,non-explosive,and
non-corrosive goods.Flash point(COC)is more
than 100℃.
⑷Storage:At 25℃ dry place for 1 year. |
|
