PPG Series Polyurethane Prepolymer
Application: it can be used to make rods,caster wheel,rollers,sealing rings,seive plates and other polyuretane elastomer.
Characteristics: the end of products have good abrasion resistance.water resistance,germ proof,excellent mechanical preperities,color regulating by adding pigment.
Operation Points: After the performed polymer vacuum degassing in 80-85℃,blending with melted MOCA,Vacuum drgassing casting,vulcanization moulding.It is apply to manual or casting machine
Type |
DHK1270 |
DHK1278 |
DHK1280 |
DHK1285 |
DHK1290 |
DHK1295 |
DHK1298 |
DHK1260 |
NCO content（%） |
8.0±0.2 |
8.5±0.2 |
4.0±0.1 |
4.5±0.2 |
5.0±0.2 |
6.2±0.2 |
6.5±0.2 |
7.0±0.2 |
MOCA (g/ 100g ) |
23 |
24.0 |
11.5 |
13 |
14.5 |
18 |
19 |
20.3 |
Viscosity (mPa·s) |
450 |
400 |
350 |
400 |
450 |
240 |
300 |
400 |
Apperance | Colorless Liquid and Light amber liquid | |||||||
Mixing Temperature
（Prepolymer/MOCA） |
75/110 |
75/110 |
80/120 |
80/120 |
80/120 |
75/120 |
75/120 |
75/120 |
Gel Time(min) |
2 |
2 |
4.5 |
4 |
3.5 |
3 |
2.5 |
2 |
Post cureTime (h/100 ℃) |
10 |
10 |
10 |
10 |
10 |
10 |
10 |
10 |
Hardness（Shore A） |
70±2(D) |
78±2(D) |
83±2 |
86±2 |
90±2 |
94±2 |
97±2 （53D） |
60D±2 |
100%Modulus (MPa) | 23.2 | 32.5 | 5.4 | 5.9 | 8.9 | 9.2 | 15.2 | 15.8 |
300%Modulus (MPa) | / | / | 10.0 | 10.3 | 14.6 | 16.8 | 24.6 | 23 |
Tensile strength(MPa) | 39 | 42 | 19 | 21 | 31 | 32 | 34 | 35 |
Elongation at break(%) |
230 |
180 |
500 |
480 |
460 |
450 |
440 |
420 |
Tear strength (without nick)/KN/m |
123 |
145 |
53 |
57 |
73 |
78 |
95 |
120 |
Tear strength (with Nick)/ KN/m | 25 | 32 |
15 |
17 |
25 |
26 |
35 |
38 |
Storage: Store in a cool and dry place,If you can’t use it up at a time,filling nitrogtn gas and then sealing it. The storage time of original packing is 6months
Packing : 20kgs/drum or 200kg/drum
