Product Name:

 

PTMG System Polyurethane Prepolymer

 

        聚四氢呋喃型聚氨酯预聚体            

------------------------------------------------------------------------------------

PTMG series Polyurethane Prepolymer

l       Characteristics:the end product have good abrasion resistance,water resistance,germ proof,excellent mechanical properities,color regualting by adding pigment.

l       Application: it can be used to make rods, ,rollers,caster wheel,sealing ring,sieve palste and other polyurethance elastomers.

l       Operation Points:  After vacuum degassing at 80-85℃,blending with melted MOCA,,degassing and then casting,vulcanization molding.This is apply to manual or casting machines

l       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

l       Packing :20kgs/drum or 200kg/drum

 --------------------------------------------------------------------

TYPE	DHK3185	DHK3190	DHK3195	DHK3197
NCO (%)	3.5±0.2	4.2±0.2	5.5±0.2	6.3±0.2
Density 25oC	1.11	1.11	1.12	1.12
Viscosity  80oC	600-900	500-800	400-600	400-600
Apperance (Solid)	White	White	White	White
Apperance (Liquid)	Colorless or light amber
Operation Time   (min)   resin 80-85oC/MOCA	12—15	10—15	6—10	3—5
Demould Time  (h) 115oC	1.5	1	1	1
Vulcanization Time (h)100oC	15	15	15	15
Hardness (Shore A)	85±2	90±2	95±2	97±2
Tensile Strength (Mpa)	33-37	38-45	38-45	40-46
Tear Strength (KN/m)	80-90	85-95	90-100	95-105
Elongation (%）	450-520	420-480	370-420	320-400
Compression permanent(%)70oC 22h	25	29	30	30
Abrasion wear (mm³/1.61Km）	≤0.02	≤0.018	≤0.015	≤0.015