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	50：100
Mixing Viscosity	25℃ mpa·s	1000±300
Mixing Density	25℃，g/ml	1.40±0.05
Pot life*	60℃，min	>60
Curing Schedule	℃/h	60/3~4或25/48

l  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	4500A (-1)/4500B (-1)
Hardness	Shore-D	75±5
Volume resistivity	25℃，Ω·cm	＞1013
Water Absorption	24h, 25℃，%	<0.3
Flammability	UL94，1/16in	V-0
Dielectric strength	25℃，KV/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.