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4500PA/PB 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 10:57 人气:
产品介绍
  

 

Brief instruction

    4500PA/PB is two-component Polyurethane casting system, have the properties of good thermal shock resistance, excellent electric properties, and low water absorption.
 

Product Data

Item
Method
4500PA
4500PB
Appearance
Visual
Light Yellow Liquid
Black Viscous Liquid
Viscosity
25 mpa·s
100±50
3000±500
Density
25 g/ml
1.20±0.05
1.50±0.05
Shelf-life
R.T.
 6 months
6 months

Work Process:

Item
Unit or Condition
4500PA/PB
Mixing Proportion
Weight Proportion
1617:100
Pot life*
25,min
20~30
Curing Schedule
℃/hrs
60/34 or 25/24

l        Time to reach 5000 mPa·s
Application
Used for casting of electric unit such as transformers, capacitorsfilters etc
Work method:
a)      PreheatingThe unit preheat at 70~80for 1~2hour to remove humidity
b)      MixingWeight A and B by mix ratio and mix thoroughly;
c)      DegassingDegas the mixture B by vacuum;
d)      castingCast the degassed mixture into the preheated unit
Properties of Cured System

Item
Unit or Condition
4500PA/PB
Hardness
Shore-D/Shore-A, 25
40±5/75±10
Volume resistivity
25Ω·cm
>1×1014
Water Absorption
24h, 25℃%
<0.3
Tensile strength Tear elongation
Mpa
>3
Surface resistivity
Ω
>1×1014
Dielectric strength
50HZ at 23℃,kV/mm
> 20
Combustibility
UL-94
V-0
Tear elongation
100
> 50
Application temperature range
-40~130(Class B)

Max working temperature is considered according the available laboratory information. The final use temperature must be considering the thermal class of all other used components for construction of final device.
    Conformity to B class has been valuated according to IEC 60216 / IEC 60085.
Storage
 Store the components in a dry place at 18-25,in tightly sealed original containers. Under these conditions, the
shelf life will correspond to the expiry date stated on the Label. After this date, the product may be processed
only after reanalysis. Partly emptied containers should be tightly closed immediately after use
Packing
25Kg or 20kg Metal Container
  Remarks:
 The above technical data are typical product data at 70% humidity and 25 degree C, for customer reference only.
These properties have been determined by the methods shown above and only valid for standard test specimen.
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