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:
¢ÅExcellent processing properties,low
viscosity.
¢ÆLong pot life.At 35¡æ,35g compounds(A+B),the
duration of time finishing the mixing to the
viscosity becoming twice as much as
origin¡ªPot life is more than 3.5hr.
¢ÇLow curing temperature,bright surface.
¢ÈGood mechanical,electrical,and thermal
properties.
¢ÉLow toxicity.
¢ÊGood flame resistance,in keeping with the
technical requirements stated in UL-94 on
V-1 grade.
¢ËTwo¡ªpackage 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¡æ,mPa.s) |
A |
4000-10000 |
|
B |
25-45 |
|
A+B |
400-1000 |
|
3 |
Density(25¡æ,g/cm3) |
A |
1.60-1.70 |
|
B |
1.19-1.21 |
|
A+B |
1.30-1.60 |
|
4 |
Gelation time(150¡æ,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¡æ,24 hr,%) |
¡Ü0.18 |
|
2 |
Flexural
strength(Mpa) |
¡Ý65 |
|
3 |
Volume
resistivity(25¡æ ohm-m) |
¡Ý1013 |
|
4 |
Surface
resistivity(25¡æ,ohm) |
¡Ý1013 |
|
5 |
Dielectric
strength(23¡æ,KV/mm) |
¡Ý20 |
|
6 |
Dielectric
constant(25¡æ,1mHz) |
¡Ü4.3 |
|
7 |
Volume
shrinkage(%) |
¡Ü1 |
|
8 |
Dissipation
factor(25¡æ,1mHz,%) |
¡Ü2 |
|
9 |
Coefficient of linear
expansion(1/¡æ) |
¡Ü60¡Á10-6 |
|
10 |
Glass transition temperature(¡æ) |
¡Ý80 |
|
11 |
Flame
resistance |
FV-1 |
3.The
technological curve for WCC-87 flame
retardant epoxy resin casting compound.
¢ÅThe relationship between temperature
and viscosity of major agent.
¢ÆThe
viscosisty curve for mixture of major
agent and curing agent at 25¡æ.
¢ÇThe
reactionary exothermal peak curve for
mixture of major agent and curing
agent.(100g)
4.Usage
process
¢ÅBefore using,major agent is heated to
55¡æ,sufficiently stirred,in order that
partial precipitate is dispersed into resin.
¢ÆVacuum deaerate for 1h to remove bubble.
¢ÇCasting:Adjust the measure to
appropriate,as soon as perform the casting
operation.
¢ÈCuring:Curring carry out under given curing
condition,open fan for heater,to internal
temperature is homogeneous.
5.Application note
¢ÅAfter every time usage operation finish,all
appliance should be cleaned using acetone or
alcohol,which contacted with resin.
¢ÆRemainder in using major agent and curing
agent(not mixed) should closely lidded with
cover.
¢ÇOperation 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¡æ.
¢ÈStorage:At 25¡æ dry place for 1 year. |
|
