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4050A/B Polyurethane casting system

品牌:无锡惠隆电子材料有限公司 单位:王强 13771533715 上架日期:12-06-08 10:51 人气:
产品介绍
  

 

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
4050A/B
Hardness
Shore-A
30±5
Volume resistivity
25,Ω·cm
>1013
Water absorption
24hrs, 25,%
<0.3
Insulation strength
25kV/mm
>20
Tear elongation
%
>150
Combustibility
UL94 V-2
equivalent

 
Ⅳ、Application
Used for casting of electric units such as electrical portfire controllerIC board etc.
 
 
 
Ⅴ、Work method
1.        PorheatingThe units proheat at 70~80 for 1~2h to remove humidity
2.        MixingWeight A and B by mix ratio and mix throughly
3.        DegassingDegas the mixture by vacuum
4.        CastingCast 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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