Polyurethane sealant (Polyurethane Resin) 4050A / B
After curing the appearance of
I. Introduction:
Department of polyurethane product packaging materials, with excellent low temperature properties, weather resistance, electrical performance and low water absorption.
Second, the conventional performance:
Test items
Units and Conditions
WL-4050A / B
Appearance
A
/
Yellowish 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
Applicable period
25 ℃ min
20 to 40 (to 10000mPa · s only)
Ratio
Weight ratio
A: B = 75 ± 2: 100
Curing conditions
℃ / h
60 ℃ / 3h or 25 ℃ / 24h
Shelf life
Sealed at room temperature
Three months
Third, the curing characteristics:
Item
Unit or condition
WL-4050A / B
Hardness
Shore-A
30 ± 5
Volume resistivity
25 ℃, Ω · cm
> 1013
Water absorption
24hrs, 25 ℃,%
<0.3
Dielectric strength
25 ℃, kV / mm
> 20
Elongation
%
> 150
Flame-retardant
UL94 V-0
Quite
Fourth, use:
For electronic components, circuit boards, electronic ignition controller of the casting and potting.
Fifth, use of technology:
1. Warm-up: Please be pouring device 70 ~ 80 ℃ bake 1 to 2 hours to remove moisture devices;
2. Mixed: A weighed amount of material, then, to join B material, mix well;
3. Deaeration: removal of the gas mixture to a vacuum;
4. Cast: After the deaeration the mixture poured into the device, 60 ℃ / 3hrs or 25 ℃ / 24hrs or low temperature curing time can be fully extended.
VI Notes
[Workplace Safety]
Work needs to take
Gloves must be
Sleeves are recommended when skin contact
Goggles / safety glasses required
Protective cover / dust cover does not require
[Skin Protection]
Bare skin protection before work ointment applied
Work or apply protective ointment nutrition
Wash contaminated skin graze with a paper towel, then wash with warm water and alkali-free soap, then dry with a disposable towel. No solvent
[Cleanup] workplace
Use light-colored paper covered table. The use of disposable beaker and so on.
[Processing] spill
Adsorption using sawdust or cotton waste after, on a plastic-lined trash
[Treatment] ventilation
Plant often ventilation, ventilation
Install exhaust fan in the workplace, the operator should be taken to avoid inhalation of vapors
7, Packing specifications:
A metal container 20KG packaging material; B packaging material for the 18KG metal drums.
* Note: The above performance data for the product in 70% humidity, temperature 25 ℃, the typical test data for customers reference, and can not guarantee that in a specific environment can be achieved when all the data. Please use the customer, subject to the measured data.
