Stickfast
318 is a rigid highly reactive isophthalic
acid based polyster resin specifically designed
for SMC/DMC application. Stickfast 318 is
adjusted to provide an optimum thickening
behaviour. The resin has a high SPI Peak
exotherm and low cure time that allows faster
production rates.
The
mouldings made from Stickfast 318 provides
superior chemical resistance, mechanical
strength, toughness and hear resistance,
Stickfast 318 is suitable for most SMC/DMC
– standard and fire retardant formulations.
TYPICAL
PROPERTIES OF STICKFAST 318
Appearance
Light
yellow liquid
.
Speicifiy
gravity @ 25 °C
1.1
0.02
Viscosity
@ 25 °C
(CPS) :
(Brookfield Viscometer)
1200
200
Volatile
Content (Wt %)
34
2
Acid
Value (mgs KOH/gm)
20
5
Water
content (% max)
0.25
Shelf
Life
About
6 months at 20 °C
When stored in original sealed containers.
CURING
CHARACTERISTICS
SMC/DMC are cured by using high
temperature curing peroxzide catalysts
like TBPB and similar types of Peroxides.
:
Gel
time @ 140 °C
with 1%
TBPB (Seconds)
46
– 50
Peak
Exotherm temperature (°C)
220
5
Time
to reach Peak exoterm :
(Seconds)
90
– 100
TYPICAL
MECHANICAL PROPERTIES OF CURED UNREINFORCED
RESIN
Tensile
strength (Kg/cm2)
550
– 600
Flexural
strength (Kg/Cm2)
1000 – 1100
Heat
Distortion Temperature (°C)
110
5
Barcol
Hardness
40 –45
(
The laminates for testing
are prepared using standard
MEKP and cobalt accelerator.
The specimens for testing
are cured for 24 hours at
room temperature followed
by post curing for 4 hours
at 80 °C)
0.02