Kuraray Polyol
Kuraray has polyester/polycarbonate polyols. Kuraray Polyol has various molecular weights, amorphous and liquid, with low viscosity at room temperature.
Features
Softness
Kuraray Polyol is liquid with low viscosity at room temperature, allowing increased operating efficiency.
Solvent compatibility
Kuraray Polyol enables plenty of formulation possibilities.
Polyol compatibility
Kuraray Polyol is soluble in polyether polyols and conventional polyols.
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Left: Kuraray Polyol P-2010 M.W.2,000
Right：Poly butanediol adipate M.W.2,000
Softness
Pre-polymer based on Kuraray Polyol can be highly solid because Kuraray Polyol reduce pre-polymer viscosity. This allows Kuraray Polyol to increase operating efficiency.
| Polyester polyol | MW. | Appearance (25oC) |
Viscosity[mPa・s] (25oC) |
|---|---|---|---|
| Adipate type | |||
| Kuraray Polyol P-510 |
500 | Liquid | 540 |
| Kuraray Polyol P-2010 |
2,000 | Liquid | 5,700 |
| Kuraray Polyol P-5010 |
5,000 | Liquid | 47,000 |
| Three functional types | |||
| Kuraray Polyol F-2010 |
2,000 | Liquid | 7,200 |
Bio-based type  |
|||
| Kuraray Polyol P-2050 |
2,000 | Liquid | 5,200 |
| Polycarbonate polyol | MW. | Appearance (25oC) |
Viscosity[mPa・s] |
|---|---|---|---|
| Kuraray Polyol C-2090 |
2,000 | Liquid | 4,600@60oC |
Solvent compatibility
Kuraray Polyol is soluble in solvents such as toluene and alcohol. Therefore, it can be combined with various solvents.
Compatibility of polyols with solvents
| Solvent Ratio | Solvent | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MeOH | iPrOH | Tol | MEK | EtOAc | ||||||||||||
| 25% | 50% | 75% | 25% | 50% | 75% | 25% | 50% | 75% | 25% | 50% | 75% | 25% | 50% | 75% | ||
| Polyol | P-2010 MPD adipate |
++ | ++ | + | ++ | + | + | ++ | ++ | ++ | ++ | ++ | ++ | ++ | ++ | ++ |
| PBA Poly butanediol adipate |
- | + | -- | - | + | -- | - | ++ | ++ | - | ++ | ++ | - | ++ | ++ | |
| PCL Polycaprolactone |
- | - | -- | - | - | -- | - | ++ | ++ | - | ++ | ++ | - | - | ++ | |
| C-2090 MPD/1,6-hexanediol carbonate |
+ | -- | -- | + | -- | -- | ++ | ++ | ++ | ++ | ++ | ++ | ++ | ++ | ++ | |
| PHC Poly hexanediol carbonate |
-- | -- | -- | + | -- | -- | - | ++ | ++ | - | ++ | ++ | - | ++ | ++ | |
- ++
- homogeneously dissolved
- +
- white turbidity (emulsion)
- -
- partially dissolved
- --
- separated
Polyol compatibility
Kuraray Polyol is compatible with polyether polyol. Properties of polyurethanes based on polyether polyols are improved by using blended polyol (polyether polyol with Kuraray Polyol).
Compatibility of polyols
| Type | Grade | Polyether polyol | ||
|---|---|---|---|---|
| PPG (di functional) MW.2000 |
PPG (tri functional) MW.3000 |
PTMG MW.1000 |
||
| Polyester MW.1,000 |
P-1010 MPD adipate |
++ | ++ | ++ |
| PBA Poly butanediol adipate |
++ | - | - | |
| Polycarbonate MW.1,000 |
C-1090 MPD/1,6-hexanediol carbonate |
+ | - | + |
| PHC Poly hexanediol carbonate |
- | - | - | |
- ++
- homogeneously dissolved
- +
- dissolved (depends on the ratio)
- -
- white turbidity or separated
Applications
Polyester polyols
- Adipate: printing inks, coatings, TPU, synthetic leathers
- Terephthalate/isophthalate: adhesives, coatings, polyurethane dispersions
- Sebasate: coatings, TPU
Polycarbonate polyols
- Synthetic leathers, urethane films, coatings
Product lineup
Kuraray Polyol grades are based on their composition.
P series: polyester polyols
F series: trifunctional polyester polyols
C series: polycarbonate polyols
Characteristics of polyurethanes with different polyols
- Softness
- Kuraray Polyol enhances softness while maintaining durability.
- Water resistance
- Kuraray Polyol gives better water resistance to polyurethanes than conventional polyester polyols.
- Abrasion resistance
- Polyurethanes based on Kuraray Polyol are superior to polyurethanes based on polyether polyol.
- Heat resistance
- Polyurethanes based on Kuraray Polyol are superior to polyurethanes based on PTMEG.
