WL-4009A/B Polyurethane casting system　

Ⅰ Brief instruction：

WL-4009A/B 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	WL-4009A	4009B
Appearance	Visual	yellowish Viscous Liquid	Buff Viscous
Viscosity	25℃ mpa·s	100~300	600~1000
Density	25℃ g/ml	1.2	0.95
Shelf-life	R.T.	3 months	3 months

Ⅲ Work Process:

Item	Unit or Condition	WL-4009A/B
Mixing Proportion	Weight Proportion	50:100
Pot life*	25℃，min	40
Curing Schedule	℃/hrs	60/3 or 25/24

    * Time to reach 5000 mPa·s

Ⅳ Application：

Used for casting of electric unit such as transformers, capacitors、filters etc。

Ⅴ Work method:

a)      Preheating：The unit preheat at 70~80℃for 1~2hour to remove humidity；

b)      Mixing：Weight A and B by mix ratio and mix thoroughly;

c)      Degassing：Degas the mixture B by vacuum;

d)      casting：Cast the degassed mixture into the preheated unit。

Ⅵ Properties of Cured System：

Item	Unit or Condition	WL-4009A/B
Hardness	Shore-A	60~90
Volume Resistance	25℃，Ω·cm	1.0×1013
Insulation Strength	25℃，kV/mm	22.4
Water Absorption	24h, 25℃，%	<0.3

Ⅶ 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

Ⅷ Packing：

    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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