PHT-4-DIOL

PHT-4-Diol is a high-purity polyhydric alcohol developed for use in high-performance polyurethane and epoxy systems.
PHT-4-Diol is primarily valued for its ability to enhance flexibility, hydrolysis resistance, and mechanical strength in polymer formulations.
PHT-4-Diol is especially suitable for elastomers, coatings, adhesives, and sealants requiring long-term durability and stability.

CAS Number: 2767-72-0
EC Number: 220-446-3
Molecular Formula: C8H18O4
Molecular Weight: 178.23 g/mol

Synonyms: 1,6-Bis(hydroxyethyloxy)hexane, Diethylene glycol monohexyl ether diol, Hexane diol ether, PHT-4 Diol, 1,6-Bis(2-hydroxyethoxy)hexane, PHT-4 flexible chain extender, Ether-diol PHT-4, Hexamethylene bis(2-hydroxyethyl) ether, PHT-4 curing agent, PHT-4 polyether diol, Flexible diol PHT-4, Diol with ether bridge, Polyether diol PHT4, Chain extender PHT-4, High-purity PHT-4 diol, Diol for polyurethane elastomers, Hydroxyethyl hexane diol, 2-Hydroxyethyl ether hexane diol, PHT-4 for polyurethanes, Diol for epoxy formulations

APPLICATIONS

PHT-4-Diol is used as a chain extender in polyurethane elastomers to enhance elasticity and mechanical performance.
PHT-4-Diol is incorporated in epoxy systems to improve flexibility and impact resistance.
PHT-4-Diol is utilized in high-performance adhesives and sealants for improved bonding strength and durability.

PHT-4-Diol is applied in thermoplastic polyurethanes (TPU) to increase softness and elongation properties.
PHT-4-Diol is employed in coatings and surface treatments requiring hydrolysis resistance and weatherability.
PHT-4-Diol is used in reaction injection molding (RIM) formulations to improve flexibility and dynamic fatigue resistance.

PHT-4-Diol is suitable for polyurethane systems used in footwear, automotive parts, and soft molded items.
PHT-4-Diol is found in 2K polyurethane coatings where balance of hardness and flexibility is desired.
PHT-4-Diol enhances the stability of UV-curable formulations by reducing brittleness.

PHT-4-Diol is used in cast elastomer applications requiring excellent rebound and tear strength.
PHT-4-Diol contributes to high performance in coatings for wood, metal, and plastic substrates.
PHT-4-Diol is applied in flexible foam systems as a performance modifier.

PHT-4-Diol is employed in composite matrix resins to improve toughness and moisture resistance.
PHT-4-Diol is used in flexible packaging adhesives for strong yet adaptable bonds.
PHT-4-Diol is added to hydrophilic formulations for improved water compatibility and balance.

PHT-4-Diol is incorporated in formulations for vibration damping and energy absorption.
PHT-4-Diol is used in soft-touch coatings and molded parts for enhanced user experience.
PHT-4-Diol is compatible with aliphatic and aromatic isocyanates in polyurethane systems.

PHT-4-Diol is employed in sports equipment materials requiring flexibility and impact performance.
PHT-4-Diol is used in textile coatings for improved wash resistance and mechanical stability.
PHT-4-Diol is applied in electronics encapsulants and potting compounds for thermal and chemical resistance.

PHT-4-Diol is found in pressure-sensitive adhesives for superior tack and cohesive strength.
PHT-4-Diol supports formulations that require flexibility under cyclic stress conditions.
PHT-4-Diol is used in structural adhesives for composite bonding in transport and construction sectors.

PHT-4-Diol is used as a diol monomer in the production of high-performance polyesters.
PHT-4-Diol enhances the chemical resistance of polyester-based materials.

PHT-4-Diol is commonly used in the synthesis of PETG (polyethylene terephthalate glycol).
PHT-4-Diol contributes to improved clarity and toughness in copolyester resins.

PHT-4-Diol is used in the manufacture of plastic bottles and containers.
PHT-4-Diol improves impact resistance in transparent thermoplastics.

PHT-4-Diol provides excellent hydrolytic stability in polymer applications.
PHT-4-Diol is suitable for medical device and packaging applications.

PHT-4-Diol is used to modify polyethylene terephthalate for better processability.
PHT-4-Diol improves the flexibility of rigid polymer chains.
PHT-4-Diol is used in the production of UV-curable coatings and resins.

PHT-4-Diol enhances weatherability in outdoor plastic products.
PHT-4-Diol is applied in hot-melt adhesives and reactive systems.

PHT-4-Diol supports the formulation of clear, non-crystalline polyesters.
PHT-4-Diol is compatible with a wide range of diacid monomers in polyester synthesis.

PHT-4-Diol contributes to low color and high gloss in finished polymers.
PHT-4-Diol is used in powder coatings for metal and plastic substrates.

PHT-4-Diol improves thermal stability in engineering thermoplastics.
PHT-4-Diol is used in the synthesis of high-gloss, solvent-resistant coatings.

PHT-4-Diol provides improved flow properties in molding and extrusion.
PHT-4-Diol is used in the textile industry for durable finish resins.

PHT-4-Diol is a key monomer in waterborne polyester resin formulations.
PHT-4-Diol enhances pigment dispersion in industrial coatings.
PHT-4-Diol is applied in optical-grade polymers for superior transparency.

PHT-4-Diol is used in the production of copolyesters for cosmetic packaging.
PHT-4-Diol enables fast curing and high crosslink density in UV-curable systems.

PHT-4-Diol is used in protective coatings for electronics and optical devices.
PHT-4-Diol improves resistance to yellowing under thermal or UV exposure.

PHT-4-Diol is selected for its balance of rigidity and flexibility in resins.
PHT-4-Diol is suitable for food-contact compliant copolyesters.
PHT-4-Diol helps control crystallinity and molecular weight in polymer synthesis.

PHT-4-Diol provides excellent scratch and abrasion resistance in coatings.
PHT-4-Diol is used in inks and overprint varnishes for improved durability.

PHT-4-Diol is employed in the formulation of low-VOC resins and paints.
PHT-4-Diol is compatible with various curing agents and crosslinkers.

PHT-4-Diol supports high-speed processing in injection molding applications.
PHT-4-Diol enhances gloss retention in architectural coatings.
PHT-4-Diol is used in flame-retardant polyester applications.

PHT-4-Diol improves stress-crack resistance in molded plastic parts.
PHT-4-Diol is a preferred building block for high-performance copolyesters.

DESCRIPTION

PHT-4-Diol is a clear, colorless to pale yellow liquid with a low viscosity and mild odor.
PHT-4-Diol is a di-functional polyether-based diol, characterized by ether linkages that provide enhanced flexibility.
PHT-4-Diol offers balanced reactivity and processability with both polyurethane and epoxy systems.

This diol imparts high hydrolysis resistance, making it ideal for applications exposed to moisture and humidity.
PHT-4-Diol improves elasticity, elongation, and toughness in thermosetting and thermoplastic polymers.
PHT-4-Diol has low volatility and excellent compatibility with a wide range of formulation ingredients.

PHT-4-Diol is non-crystallizing and remains liquid over a broad temperature range, simplifying processing.
PHT-4-Diol reduces brittleness in cured systems and improves shock absorption properties.
PHT-4-Diol is used in flexible and elastic polymer networks for industrial and consumer applications.

The ether bridges in its structure enable excellent flexibility and resistance to environmental degradation.
PHT-4-Diol is suitable for eco-conscious and high-performance systems where durability and flexibility are crucial.

PROPERTIES

Chemical Formula: C8H18O4
Molecular Weight: 178.23 g/mol
Common Name: PHT-4-Diol
Appearance: Clear to pale yellow liquid
Odor: Mild
Density: ~1.05 g/cm³
Boiling Point: >250°C (decomposes)
Viscosity: Low to medium (~50–150 mPa·s at 25°C)
Solubility: Miscible with alcohols and glycol ethers
Flash Point: >200°C
pH (aqueous solution): Neutral
Reactivity: Reactive with isocyanates and epoxy resins
Chemical Stability: Stable under normal conditions
Storage Temperature: 10–30°C in sealed containers

FIRST AID

Inhalation:
Move the exposed person to fresh air immediately.
Provide artificial respiration if necessary.
Seek medical attention if symptoms persist.

Skin Contact:
Wash skin thoroughly with soap and water.
Remove contaminated clothing.
If irritation develops, consult a physician.

Eye Contact:
Flush eyes with water for at least 15 minutes.
Remove contact lenses if applicable.
Seek immediate medical attention if irritation continues.

Ingestion:
Do not induce vomiting unless advised by medical personnel.
Rinse mouth with water.
Seek medical attention if large amounts are ingested or if symptoms occur.

Note to Physicians:
Treat symptomatically.
No specific antidote.
Supportive care recommended.

HANDLING AND STORAGE

Handling:
Use appropriate PPE including gloves, goggles, and protective clothing.
Ensure adequate ventilation, especially during heating.
Avoid contact with eyes, skin, and clothing.
Practice good industrial hygiene and wash hands after use.

Spill and Leak Procedures:
Absorb spill with inert materials like sand or vermiculite.
Prevent entry into drains and water sources.
Dispose in accordance with local environmental regulations.

Storage:
Store in tightly closed containers in a cool, dry, well-ventilated place.
Keep away from direct heat sources and incompatible materials.
Label containers clearly and avoid exposure to moisture.

Handling Cautions:
Avoid prolonged exposure to air and humidity.
Ensure equipment is clean and dry before use.
Use corrosion-resistant storage and transfer systems.