Product details
PTMEG based Casting Polyurethane prepolymer
1. PTMEG based polyurethane prepolymer is the higher level of Polyether prepolymer, they are recommended for applications where parts undergo dynamic stress, etc, they incur lower heat build-up. They also have advantages in high resilience, low temperature performance and resistance to water attack(hydrolysis). Polyethers also have lower viscosity and specific gravity.
2. Specifications,Application and operation details.
PTMEG/TDI system Casting Polyurethane prepolymer
Item |
Type |
|||
HJ-2185 |
HJ-2190 |
HJ-2195 |
HJ-2197 |
|
NCO% Content |
3.5±0.2 |
4.2±0.2 |
6.0±0.2 |
6.5±0.2 |
Density 25℃/(g/cm³) |
1.11 |
1.11 |
1.12 |
1.12 |
Viscosity 80℃/mpa·s |
900-1100 |
800-1000 |
700-900 |
600-800 |
Appearance at 25℃ |
Colorless transparent liquid |
|||
|
Mix Temperature ℃ Prepolymer /Moca |
85℃/115℃ |
80℃/115℃ |
75℃/115℃ |
75℃/115℃ |
Gel Time /min |
13-18 |
10-15 |
6-10 |
3-5 |
Vulcanization Time (h) |
25-16 |
25-16 |
25-16 |
25-16 |
Physical Properties | ||||
Hardness (Shore A) |
85±2 |
90±2 |
95±2 |
97±2 |
Tensile Strength (Mpa) |
25-28 |
33-38 |
38-45 |
40-46 |
100% Modulus (Mpa) |
11-12 |
14-16 |
16-18 |
18-20 |
300% Modulus (Mpa) |
18-20 |
28-30 |
38-42 |
40-43 |
Elongation at Break (%) |
360-420 |
350-400 |
280-350 |
250-300 |
Tear Strength (KN/m) |
60-65 |
75-85 |
90-100 |
95-105 |
Compression permanent deformation % |
4-6 |
4-6 |
2-4 |
2-4 |
DIN Abrasion loss（mm³） |
≤45 |
≤40 |
≤40 |
≤40 |
Resilience %/25℃ |
40-45 |
35-40 |
28-32 |
26-30 |
|
- Product application : PU Rollers, casters, seals, pistons, classification screens, flotation machine impellers, forklift tires, molds, slurry pump linings and other products. - Operation details:After vacuum degasing at 75-85 ℃, the prepolymer is mixed with melted MOCA for casting and vulcanization. It is suitable for manual and mechanical operation. - Storage:Store in a cool and dry place and use up as soon as possible after opening; If it cannot be used up at one time, it shall be sealed with nitrogen; The second opening needs to be used for defoaming, and the original storage period is six months. - Packing:20kg or 200kg iron drum | ||||
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