Description
Special properties polyurethane prepolymer High hardness type
Key features
Material prepolymer viscosity is low, easy to operate.
After the molding material has high hardness and elasticity, toughness is good, not easy to crack.
In special occasions can be replaced by casting nylon and other high hardness materials.
Typical properties
|
High hardness
|
HHN-810
|
HHN-811
|
HHN-812
|
|
Prepolymer
|
Appearance
(25℃)
|
viscous liquid
|
viscous liquid
|
viscous liquid
|
|
NCO Content(%)
|
8.0~9.0
|
8.0~9.0
|
9.0~10.0
|
|
Using
Mixture Ratio(PHR)
|
23.0~26.0
|
23.0~26.0
|
26.0~29.0
|
|
Life
in the Reaction Kettle (75~78℃/min)
|
1~2
|
2~3
|
3~5
|
|
Physical
Properties of Finished Products
|
Hardness
(Shore D)
|
75±5
|
60±5
|
75±5
|
|
Tensile
Strength (MPa)
|
37.7
|
57.5
|
63.4
|
|
Tearing
Strength (kN/m)
|
87.9
|
187.1
|
197.2
|
|
Elongation
at Break (%)
|
402
|
331
|
210
|
|
Akron
Abrasion (cm3/1.61km)
|
0.1
|
0.05
|
0.05
|
Application
-Mainly used in the production of high hardness polyurethane elastomer products, such as a variety of wheels, mechanical parts, etc.
Usage method
-Can be used for manual, more suitable for the operation of the casting machine, chain extender is MOCA.
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.
