Description
Polyurethane prepolymer polyol MDI system
Key features
No irritating odor.
Products have good toughness and elasticity.
Excellent abrasion resistance and water resistance.
Typical properties
|
polyol MDI system
|
P-MDI--100
|
P-MDI
-101
|
P-MDI
-102
|
P-MDI
-103
|
P-MDI
-104
|
P-MDI
-105
|
|
Prepolymer
|
Appearance (25℃)
|
Waxy solid
|
Waxy solid
|
Waxy solid
|
Waxy solid
|
Waxy solid
|
Waxy solid
|
|
NCO Content(%)
|
5.5~6.5
|
6.6~7.2
|
7.5~8.5
|
5.0~6.0
|
6.0~6.8
|
7.2~8.0
|
|
Using Mixture Ratio
(PHR)
|
5.6~6.6
|
6.7~7.3
|
7.6~8.6
|
5.1~6.1
|
6.1~6.9
|
7.3~8.1
|
|
Life in the Reaction Kettle (75~78℃/min)
|
8~10
|
5~7
|
5~7
|
8~10
|
5~7
|
5~7
|
|
Physical properties of
finished products
|
Hardness (Shore
A)
|
60±5
|
85±5
|
95±5
|
60±5
|
85±5
|
95±5
|
|
Tensile Strength (MPa)
|
51.3
|
55.3
|
57.2
|
41.7
|
45.5
|
52.8
|
|
Tearing Strength
(kN/m)
|
78.4
|
135.0
|
135.7
|
70.6
|
123.2
|
127.5
|
|
Elongation at Break
(%)
|
516
|
520
|
498
|
461
|
577
|
558
|
|
Akron Abrasion (cm3/1.61km)
|
0.08
|
0.05
|
0.03
|
0.08
|
0.05
|
0.03
|
Application
Mainly used in the production of polyurethane elastomer products with the corresponding requirements, such as a variety of industrial components, roller, rubber roller, rubber, oil seal, cushion material, plate, etc..
Usage method
Can be used for manual operation, more suitable for the operation of the casting machine, chain extender are BDO and TMP, etc.
Attention
The prepolymer should be stored at low temperature and dry place, avoid the moisture and moisture when used
After the opening of the prepolymer should be used up as soon as possible, if not exhausted with nitrogen seal.
The storage period of unopened prepolymer is three months.
If you want to add color paste or other materials, keep the water content below 0.1%, and consider the compatibility of additives.
