Product Details
Hot-cast polyurethane

PTMEG MDI Hot-cast Polyurethane

  • Key features:
    - Hardness: 80-90A
    - Curing agent: 14BDO
    - High tensile strength
    - Good hydrolysis resistance
    - Good mechanical property
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Product Introduction

Application
This series of hot-cast polyurethane (also named as polyurethane prepolymer) is suitable to make bushes, Castor Wheels, Couplings, Conveyor Rollers, Cutting Boards, Fork-lift Tyres, Gears, Grading Screens, Pneumatic and Oil Seals, Scrapers, Skate Wheels, Wire Guides.
Introduction
PTMEG-based MDI-terminated prepolymer is normally cured with1,4-Butanediol (1,4-BDO) to yield an elastomer. This product is for hot-casting polyurethane use. The product is an elastomer with excellent toughness which is characteristic of MDI-PTMEG systems without solvent or plasticizer.
PTMG + MDI hot-cast polyurethane
  CPU-MT-1080 CPU-MT-1085 CPU-MT-1090
Hardness
(Shore A)
80 ± 2 85 ± 2 90 ± 2
NCO (Wt%) 5.1 ± 0.2 6.3 ± 0.2 7.1 ± 0.2
Mixing ratio
PU prepolymer : 1,4-BDO
100 : 5 - 5.4 100 : 6.2 - 6.6 100 : 7 - 7.4
Working temperature (℃)
PU prepolymer
70 - 80 70 - 80 70 - 80
Working temperature (℃)
1,4-BDO
25 25 25
Pot life
(100g@70℃)
(min)
6 6 4
Tensile strength
(Kgf/cm2)
235 ± 25 400 ± 40 440 ± 40
Elongation (%) 550 ± 50 500 ± 50 480 ± 50
Tear Strength
(Kgf/cm)
70 ± 5 85 ± 5 100 - 115
Processing procedure 1) Pour mixed materials into moulds, which have been preheated to 110℃ and precoated with release agent. Demold casting after 2 hours at 110℃.
2) The casting should be post-cured at 110℃ for 16 hours.
1) Pour mixed materials into moulds, which have been preheated to 110℃ and precoated with release agent. Demold casting after 1 hour at 110℃.
2) The casting should be post-cured at 110℃ for 16 hours.
1) Pour mixed materials into moulds, which have been preheated to 110℃ and precoated with release agent. Demold casting after 1 hour at 110℃.
2) The casting should be post-cured at 110℃ for 16 hours.
Notice: These values are based on the test of our present laboratory test specimens.
Storage
To avoid moisture in the air, hot-cast polyurethane should be stored in sealed container at room temperature. Avoid direct sunlight exposure.
Shelf life
6 months.
Packing
200 kgs/drum.
Taiwan PU Corporation is a professional hot-cast polyurethane manufacturer, hot-cast polyurethane producer. We supply high quality hot-cast polyurethane products, have an experienced technical team and offer the best price to hot-cast polyurethane.

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