Asahi Kasei's polycarbonatediol (PCD)
All test data and values shown in this website are based on typical laboratory tests by the indicated test methods, presented for basic reference only and not as any specification or warranty, and subject to change without notice.
The table below shows qualitative comparison of the impact of polyols on polyurethane.
Although PCD offers excellent durability, hydrolysis resistance, and chemical resistance when compared to other polyols, its flexibility is inferior to that of the polyols.
Our PCD, DURANOL™ maintains the features of PCD as described above and offers improved flexibility.
 |
DURANOL™ C5C6 Copolymer |
PCD C6 Homopolymer |
PCL | PHA | PTMG |
| Heat stability | Excellent | Excellent | Good | Good | Poor |
|---|---|---|---|---|---|
| weatherability | Excellent | Excellent | Good | Good | Poor |
| Softness | Good | Poor | Good | Good | Excellent |
| Hydrolysis resistance | Excellent | Excellent | Fair | Poor | Good |
| Fungus resistance | Fair or Good | Fair or Good | Poor | Poor | Excellent |
| Oleic acid resistance | Good | Good | Poor or Fair | Fair | Poor |
| Ethanol resistance | Good | Good | Poor | Fair | Poor |
Liquid type DURANOL™ (T5652•G4672 and G3452) offers excellent handling property and solvent solubility.
Solubility[wt%] (at 25℃)
| Liquid | Solid | ||||
 |
T5652 | G4672 | G3452 | T6002 | T4692 |
| Toluen | 85 | 85 | 80 | 30 | 8 |
|---|---|---|---|---|---|
| DMF | 85 | 85 | 80 | 20 | 20 |
| Ethyl acetate | 80 | 80 | 80 | 30 | 10 |
| Acetone | 80 | 80 | 75 | 30 | 20 |
| MEK | 90 | 85 | 75 | 40 | 10 |
| N-octane | <1 | <1 | <1 | <1 | <1 |
| Methanol | <1 | <1 | <1 | <1 | <1 | Iso-propanol | <1 | <1 | <1 | <1 | <1 |
Generally, although PCD polyurethane tends to lack flexibility, use of liquid type DURANOL™ allows improvement of flexibility.
(Tensile test of polyurethane)
It can be seen that PCD polyurethanes are hard to decompose when compared to polyether urethanes and polyester urethanes.
(Change in the molecular weight of a polyurethane film immersed in hot water at a temperature of 100°C)
PCD polyurethanes show high strength retention even after storage at a high temperature.
(Change in the property of a polyurethane film stored at 120°C)
It can be seen that PCD polyurethanes have a smaller swelling rate due to organic solvent when compared to polyether urethanes and polyester urethanes and copolymerized type DURANOL™ has an excellent swelling rate in particular.
(Change in the property of a polyurethane film immersed in oleic acid (23°C) for 1 week)
PCD two-component polyurethane paint offers excellent Abrasion resistance of the paint film.
(Abrasion resistance of two-component polyurethane paint)
