MPD
CAS No. 4457-71-0
MPD (3-Methyl-1,5-pentanediol) is a diol which is an isomer of 1,6-hexanediol. MPD is amorphous, giving excellent properties to polyurethanes.: outstanding softness, high transparency and compatibility, owing to the methyl branch in the middle of its structure.
ND
CAS No. 3937-56-2
ND (1,9-Nonanediol) is a diol with a straight chain alkyl group. The melting point is relatively high thanks to the log chain, but a viscosity of 60oC is the same as acetone.
Features
■ MPD
Softness
Kuraray Polyol inhibits cohesion. This allows for increased operating efficiency.
Hydrolysis resistance
Hydrolysis resistance is good; MPD can inhibit the hydrolysis resistance of polyurethanes.
■ ND
Appropriate crystallinity
By moderately disrupting orientation (crystallinity), it imparts strength and flexibility to polyurethane.
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Left：MPD at room temp.
Right：ND heating at 60oC
Hydrolysis resistance (MPD)
The hydrolysis resistance of PU resin from MPD-based polyester polyol is high even MPD portion is small as an ingredient of polyester polyol.
Appropriate crystallinity (ND)
Compared to diols with even carbon numbers, molecular chains are less likely to be oriented, and crystallinity is appropriately suppressed, resulting in a lower melting point. The moderate crystallinity gives the resin strength and flexibility and improves transparency.
Applications
MPD
- Polyurethanes (polyols, chain extenders)
- Solvents
- Acrylate Monomer
ND
- Polyurethanes (polyols, chain extenders)
- Polyester
- UV monomer, oligomer
- Acrylate Monomer
