Description
Polyurethane prepolymer NDI, PPDI system
Key features
The utility model has the advantages of high dynamic mechanical property, especially heat resistance, and can work in the environment of 120 DEG C for a long time.
Typical properties
|
NDI、PPDI
system
|
NP-240
|
NP-245
|
|
Prepolymer
|
Appearance (25℃)
|
Waxy solid
|
Waxy solid
|
|
NCO Content (%)
|
3.6~4.2
|
3.6~4.2
|
|
Using Mixture Ratio (PHR)
|
3.7~4.3
|
3.7~4.3
|
|
Life in the Reaction Kettle
|
3~5
|
3~5
|
|
Physical Properties of Finished Products
|
Hardness (Shore
A)
|
90±5
|
90±5
|
|
Tensile Strength (MPa)
|
53.5
|
57.1
|
|
Tearing Strength (kN/m)
|
129.5
|
131.7
|
|
Elongation at Break (%)
|
523
|
551
|
|
Akron Abrasion (cm3/1.61km)
|
0.01
|
0.01
|
Application
-The utility model is mainly used for producing products with the characteristics of heat resistance, high abrasion resistance, high bearing capacity, low internal heat generation, etc.
Usage method
-Can be used for manual operation, more suitable for the operation of the casting machine, chain extender is BDO or HQEE, 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.
