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4500A (-1)/4500B (-1) 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 10:53 人气:
产品介绍
  

 

Ⅰ Brief instruction

   4500A (-1)/4500B (-1) is two-component Polyurethane casting system, have the properties of good
thermal shock resistance, excellent electric properties, and low water absorption.
 

Ⅱ Product Data

Item
Method
4500A(-1)
4500B (-1)
Appearance
Visual
Brown  Liquid
Black Viscous Liquid
Viscosity
25℃ mpa·s
100±50
3000±1000
Density
25℃ g/ml
1.20±0.05
1.55±0.05
Shelf-life
R.T. Sealed
 6 months
6 months

 
Ⅲ Work Process:

Item
Unit or Condition
4500A(-1)/4500B (-1)
Mixing Proportion
Weight Proportion
50100
Mixing Viscosity
25℃ mpa·s
1000±300
Mixing Density
25,g/ml
1.40±0.05
Pot life*
60℃min
>60
Curing Schedule
℃/h
60/3~425/48

l        Time to reach 5000 mPa·s
 
Ⅳ Application
Used for casting of electric unit such as transformers, capacitorsfilters etc
Ⅴ Work method:
a)      PreheatingThe unit preheat at 70~80℃for 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
 
Ⅵ Properties of Cured System
Item
Unit or Condition
4500A(-1)/4500B (-1)
Hardness
Shore-D
75±5
Volume resistivity
25℃Ω·cm
1013
Water Absorption
24h, 25℃%
<0.3
Flammability
UL941/16in
V-0
Dielectric strength
25KV/mm
20
Tear elongation
%
200±50
Ⅶ Storage
 Store the components in a dry place at 5-35℃,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
 
Ⅷ Packing
20Kg or 25kg Metal Container
  Remarks:
 The above technical data are typical product data at 70% humidity and 25 degree C, for customer reference only.
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