Asymmetric C5-architecture
Asymmetric C5-architecture and a unique C3-methyl branch disrupt lattice formation, ensuring a permanent amorphous state and liquid stability at temperatures as low as -50°C.
Aggregation-less rheology
The engine for structural liquidity. MPD’s C5-chain averts molecular aggregation, ensuring stable newtonian flow and freedom for high-solid, low-viscosity formulations.
C3-methyl steric shield
The source of engineered resilience. A unique C3-methyl branch on a C5-chain creates a hydrophobic shield, delivering durability and softness in extreme environments.
MPD from Kuraray: C3-branched architecture—Asymmetry by design
The operational friction in chemical synthesis and high-speed formulation often stems from the thermodynamic limitations of legacy linear molecules. Standard linear diols possess high structural symmetry, creating a “crystallization trap” that forces R&D teams to rely on energy-intensive heating lines to maintain process fluidity.
Figure 1: Eliminating the crystallization trap
While industry-standard linear diols like 1,4-BDO and 1,6-HDO require energy-intensive melting tanks to maintain flow, MPD remains intrinsically liquid at temperatures as low as -50°C. This ensures immediate process fluidity at factory ambient conditions without the need for additional thermal OpEx.
MPD (3-methyl-1,5-pentanediol) disrupts this paradigm through engineered asymmetry. Our proprietary synthesis introduces a pendant methyl group at the C3 position. This structural wedge acts as a molecular disruptor, enforcing entropy and preventing the lattice from locking into a solid state.
- Intrinsic liquidity: MPD remains a stable, clear liquid at temperatures as low as -50°C, ensuring absolute process fluidity at factory ambient conditions without thermal OpEx.
- The foundation of resilience: This C3-branch is the architectural origin of the "Steric Shield," providing the fundamental hydrolytic and rheological stability that defines the KURARAY POLYOL portfolio.
From molecular logic to material excellence: Explore MPD applications
Inkjet inks Stable nozzle hydration, rapid substrate drying
Resolving the trade-off between nozzle hydration and rapid drying: Engineering high-speed jetting integrity and absolute rheological stability through MPD-based molecular architecture.
Others: High-performance intermediates for CASE & resins Beyond polyols
MPD (3-methyl-1,5-pentanediol) provides a versatile foundation across the material spectrum. In Polyurethane systems, it functions as a primary polyol or high-efficiency chain extender for demanding CASE applications. Beyond PU, its asymmetric design is the key to mastering resilient polyester resins, high-stability plasticizers, and diacrylate monomers. Let’s collaborate to architect your specific solution.
Technical DNA: The asymmetric advantage
The performance profile of MPD from Kuraray is a direct result of its engineered asymmetry. By shifting the methyl branch to the C3 position, we disrupt the thermodynamic packing of the carbon chain. This enforces molecular entropy, ensuring the molecule remains a high-purity liquid even in extreme cold—effectively eliminating the “crystallization trap” inherent in legacy linear diols.
| Property | Standard 1,4-BDO | Standard 1,6-HDO | MPD from Kuraray |
|---|---|---|---|
| Molecular structure | Linear | Linear | Branched |
| Melting point | 20°C | 42°C | <-10°C |
| Appearance | High crystallinity | Crystalline solid | Amorphous/newtonian |
| Boiling point | 228°C | 250°C | 249°C |
| Viscosity (25°C) | 65 mPa·s | N/A (solid) | 220 mPa·s (20°C) |
| Solubility in water | Miscible | Low | Completely miscible |
Architect your next generation of high-performance systems
Why does MPD-inside define your next formulation?
- Zero-energy handling (OpEx win): Unlike 1,6-HDO or 1,4-BDO, which require heated storage tanks, insulated lines, and drum-melting stations, MPD remains a stable liquid at factory ambient temperatures. You eliminate the energy cost and carbon footprint of "keeping raw materials melted."
- High-shear newtonian stability: The asymmetric structure ensures that MPD maintains a flat rheological profile even under extreme mechanical load (105s-1). This ensures precise deposition in high-speed applications.
- Glass transition (Tg) modification: Incorporating MPD into your polymer backbone effectively lowers the Tg without plasticizers, maintaining flexibility in extreme cold where linear systems become brittle and fail.
Stop compromising between processing efficiency and long-term material durability. Leverage Kuraray’s expertise in asymmetric molecular design to master your most demanding structural and rheological constraints.