WL-4050A/B Polyurethane casting system

Ⅰ、Brief  instruction

WL-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

WL-4050A/B

Appearence

A

Visual

Pale yellow transparent liquid

B

Light yellow liquid

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=75±2 100

Curing schedule

/h

60/3h or 25/24h

Shelf life

R.T.Sealed

3 months

 

Ⅲ、Properties of cured system

Item

Unit or condition

WL-4050A/B

Hardness

Shore-A

30±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-0

equivalent

 

Ⅳ、Application

Used for casting of electric units such as electrical portfire controllerIC board etc.

 

Ⅴ、Work method

1.   PorheatingThe units proheat at 70~80 for 1~2h to remove humidity

2.   MixingWeight A and B by mix ratio and mix throughly

3.   DegassingDegas the mixture by vacuum

4.   CastingCast 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: 18 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.

Contact Mode: Mr. Angus Jin Mail: jys88@163.com 

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