4050A/B Polyurethane casting system

 

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=100 ：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	45±5
Volume resistivity	25℃，Ω·cm	>1013
Water absorption	24hrs, 25℃，%	<0.3
Insulation strength	25℃，kV/mm	>20
Tear elongation	%	>150
Combustibility	UL94 V-2	equivalent

 

Ⅳ、Application：

Used for casting of electric units such as electrical portfire controller、IC board etc.

Ⅴ、Work method：

1．  Porheating：The units proheat at 70~80℃ for 1~2h to remove humidity；

2．  Mixing：Weight A and B by mix ratio and mix throughly；

3．  Degassing：Degas the mixture by vacuum；

4．  Casting：Cast 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: 20 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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