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 curing after
Ⅰ、Brief
instruction
4050A/B is two-component
PU casting system, it has excellent low temperature properties,
good electric properties, water resistance and low water
absorption。
Ⅱ、Product
data：
|
Item |
Unit or condition |
4050A/B |
|
Appearence |
A |
Visual |
Light yellow liquid |
|
B |
Pale yellow transparent liquid Light |
|
Viscosity |
A |
25℃
mPa·s |
350±50 |
|
B |
110±10 |
|
A+B |
200±50 |
|
Density |
A |
25℃
g/cm3 |
1.15±0.05 |
|
B |
0.95±0.05 |
|
Pot
life |
25℃
min |
20~40 (to10000mPa·s) |
|
Mixing proportion |
Weight proportion |
A
：B=75±2 ：100 |
|
Curing schedule |
℃/h |
60℃/3h
or 25℃/24h |
|
Shelf life |
R.T.Sealed |
6
months |
Ⅲ、Properties
of cured system：
|
Item |
Unit or condition |
|
|
Hardness |
Shore-A |
30±5 |
|
Volume resistivity |
25℃，Ω·cm |
>1013 |
|
Water absorption |
24hrs, 25℃，% |
<0.3 |
|
Insulation strength |
25℃，kV/mm |
>20 |
|
Tear elongation |
% |
>150 |
|
Combustibility |
UL94 V-2 |
equivalent |
Ⅳ、Application：
Used for
casting of electric units such as electrical portfire controller、IC
board etc.
Ⅴ、Work
method：
1．
Porheating：The
units proheat at 70~80℃
for 1~2h to remove humidity；
2．
Mixing：Weight
A and B by mix ratio and mix throughly；
3．
Degassing：Degas
the mixture by vacuum；
4．
Casting：Cast
the degassed mixture into the preheated units。
Ⅵ、Points
to note
〔Control
and Protective measures〕
Protective
clothing needed
Protective
gloves must
Raglan
sleeves needed when skin contact exist
Goggles needed
Gas
mask/Dust proof cover not needed
〔Skin
protection〕
Before
applying use ointment on naked skin
After
applying use protect oil or nutrient oil
Cleaning of
contacted skin wipe the material from skin with absorbent paper
then wash with warm water and alkali-free soap ,do not use solvent.
〔Workplace
cleaning〕
Cover
the worktable with light colour paper, use one-off beaker。
〔Accidental
release measures〕
Soak up
with waste cotton or saw dust and deposit in plastic-lined bin
〔Ventilating
measures〕
Workshop Ventilate often
Workaround Equipped with ventilator ,avoid breathing
in the vapor
Ⅶ、Packaging：
Component A: 20 Kg Metal container Component B: 18 Kg Container ;
Ú
Note:
The data above are typical
tested at a relative humidity of 70 % and a temperature of 25℃.
They are just for customers’ reference. We cannot wholly guarantee
all the listed data will be reached under specific test conditions.
When applying the product, the customers should use data obtained
through their own testing.
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