Description
Special properties of polyurethane prepolymer with high resilience and wear resistance
Key features
The material has high resilience under high hardness.
Typical properties
|
High resilience
|
HR-711
|
HR-712
|
HR-713
|
|
Prepolymer
|
Appearance (25℃)
|
Waxy solid
|
Waxy solid
|
Waxy solid
|
|
NCO Content(%)
|
4.5~5.0
|
7.5~8.5
|
8.5~9.5
|
|
Using Mixture Ratio
(PHR)
|
13.0~14.5
|
7.6~8.6
|
8.6~9.7
|
|
Life in the Reaction Kettle (75~78℃/min)
|
8~10
|
5~7
|
6~8
|
|
Physical properties of
finished products
|
Hardness (Shore D)
|
90±5
|
95±5
|
90±5
|
|
Tensile strength (MPa)
|
48.2
|
57.2
|
57.7
|
|
Tearing Strength
(kN/m)
|
112.0
|
135.7
|
143.5
|
|
Elongation at Break (%)
|
380
|
498
|
514
|
|
Rebound Rate (%)
|
55
|
58
|
58
|
Application
-It is mainly used in the production of polyurethane products with high hardness and good elasticity.
Usage method
Can be used for manual, but also suitable for the operation of pouring machine, chain extender is MOCA or other chain extender.
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.
