What is Butanediol Diglycidyl Ether CAS 2425-79-8?

Butanediol Diglycidyl Ether CAS 2425-79-8 is a bifunctional epoxy reactive diluent with the molecular formula C10H18O4 and molecular weight 202.25 g/mol. It is commonly called BDGE or 1,4-butanediol diglycidyl ether.

Why is BDGE used in epoxy resin formulations?

BDGE lowers the viscosity of liquid epoxy systems while retaining two epoxy groups that participate in curing, so it helps improve fiber wetting and processing without eliminating crosslink density. It is used in composites, laminates, coatings, castings and adhesives.

What are typical viscosity and epoxy equivalent weight values for CAS 2425-79-8?

Common reactive-diluent grades have a viscosity around 10-25 mPa·s at 25 C and an epoxy equivalent weight roughly 120-145 g/eq depending on the supplier grade. These values are used for formulation adjustment rather than as a single fixed specification.

How does this diluent affect cured epoxy properties?

Compared with unmodified epoxy resin, BDGE can improve flexibility, adhesion, impact resistance and thermal shock resistance. It also helps the resin wet glass or carbon fiber more quickly in vacuum infusion and other composite processes.

What handling precautions are important for Butanediol Diglycidyl Ether?

BDGE is hygroscopic and should be stored in tightly closed containers to limit moisture pickup. It is classified as harmful by oral, dermal or inhalation exposure, may irritate the skin and eyes, and can be a skin sensitizer, so proper PPE and ventilation are required.

Butanediol Diglycidyl Ether CAS 2425-79-8

Butanediol Diglycidyl Ether (CAS 2425-79-8) is a low-viscosity aliphatic epoxy resin utilizing its bifunctional structure as a premium reactive diluent in coating and adhesive systems. Chemically identified as 1,4-Bis(2,3-epoxypropoxy)butane, this clear, colorless to pale yellow liquid functions to significantly reduce the viscosity of epoxy resins without compromising their mechanical strength or chemical resistance. As a versatile Glycidyl ether, it is extensively integrated into wind energy blade composites, electronic encapsulation materials, and solvent-free floor coatings to improve flexibility and wetting properties. We ensure bulk supply capabilities for this material, providing access to competitive factory pricing and customized specifications to meet specific epoxy equivalent weight (EEW) and hydrolyzable chlorine requirements. Full technical documentation, including MSDS, TDS, COA, is available to support compliance and safety protocols.

CAS: 2425-79-8
Synonyms: BDGE, 1,4-Butanediylbis(oxirane), Araldite DY 026, 1,4-Diglycidyloxybutane
Einecs: 219-371-7
Molecular Formula: C10H18O4
Grade: Industrial Grade / Electronic Grade
Package: 200kg Iron Drum or 1000kg IBC Tank (Custom packaging available).

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Product Description

1,4-Butanediol Diglycidyl Ether is a colorless to pale yellow transparent liquid with very low viscosity. As a bifunctional reactive diluent, it contains two epoxy groups that participate in the cross-linking reaction during curing.

Compared to mono-functional diluents, BDGE offers superior mechanical properties and chemical resistance. It is specifically designed to wet out fibers (glass, carbon) rapidly, making it ideal for vacuum infusion processes. It also improves the flexibility, adhesion, and thermal shock resistance of the final epoxy system.

1 Physicochemical Properties

2 Applications

3 Storage Conditions

4 Safety Precautions

Physicochemical Properties

The following specifications represent our standard export quality (General type 669 equivalent):

Property	Specification / Value
Appearance	Colorless to pale yellow transparent liquid
Epoxy Equivalent Weight (EEW)	120 – 138 g/eq
Viscosity (at 25°C)	10 – 25 mPa·s (cps)
Color (APHA/Hazen)	≤ 40
Hydrolyzable Chlorine	≤ 0.02%
Inorganic Chlorine	≤ 0.005%
Water Content	≤ 0.1%
Flash Point	> 110°C
Density (at 25°C)	1.10 ± 0.05 g/cm³

Applications

BDGE is a versatile additive used in various high-performance epoxy applications:

Composite Materials:
- Widely used in wind turbine blades, automotive parts, and aerospace components via Vacuum Infusion (VARTM) or RTM processes due to its ability to lower viscosity and improve fiber wetting.
Coatings & Flooring:
- Used in solvent-free epoxy floor coatings, self-leveling floors, and anti-corrosion coatings to improve flow and leveling.
Electronic Encapsulation:
- Used in potting compounds and casting resins for electronic components (insulators, transformers) to reduce bubbles and improve penetration.
Adhesives:
- Acts as a toughening agent and diluent in structural epoxy adhesives.
Civil Engineering:
- Used in concrete repair compounds and crack injection resins.

For related epoxy-system raw materials, see Epoxy Resin (Bisphenol A) and MTHPA.

Storage Conditions

Environment: Store in a cool, dry, and well-ventilated warehouse. Avoid direct sunlight and rain.
Temperature: Keep away from fire and heat sources. Optimal storage temperature is ambient (5°C – 35°C).
Sealing: This product can absorb moisture. Keep containers tightly closed when not in use.
Shelf Life: 12 months from the production date in original unopened packaging.

Safety Precautions

Skin Contact: BDGE is a skin irritant and potential sensitizer. Avoid direct contact. Wear chemical-resistant gloves and protective clothing.
Eye Contact: Can cause serious eye irritation. Wear safety goggles or a face shield. If contact occurs, rinse immediately with plenty of water for at least 15 minutes and seek medical advice.
Inhalation: Use in well-ventilated areas. Avoid breathing vapors or mists.
First Aid:
- Skin: Wash thoroughly with soap and water.
- Ingestion: Do not induce vomiting. Seek medical attention immediately.

FAQ - Technical & Supply Chain

Q:
What is Butanediol Diglycidyl Ether CAS 2425-79-8?

A: Butanediol Diglycidyl Ether CAS 2425-79-8 is a bifunctional epoxy reactive diluent with the molecular formula C10H18O4 and molecular weight 202.25 g/mol. It is commonly called BDGE or 1,4-butanediol diglycidyl ether.
Q:
Why is BDGE used in epoxy resin formulations?

A: BDGE lowers the viscosity of liquid epoxy systems while retaining two epoxy groups that participate in curing, so it helps improve fiber wetting and processing without eliminating crosslink density. It is used in composites, laminates, coatings, castings and adhesives.
Q:
What are typical viscosity and epoxy equivalent weight values for CAS 2425-79-8?

A: Common reactive-diluent grades have a viscosity around 10-25 mPa·s at 25 C and an epoxy equivalent weight roughly 120-145 g/eq depending on the supplier grade. These values are used for formulation adjustment rather than as a single fixed specification.
Q:
How does this diluent affect cured epoxy properties?

A: Compared with unmodified epoxy resin, BDGE can improve flexibility, adhesion, impact resistance and thermal shock resistance. It also helps the resin wet glass or carbon fiber more quickly in vacuum infusion and other composite processes.
Q:
What handling precautions are important for Butanediol Diglycidyl Ether?

A: BDGE is hygroscopic and should be stored in tightly closed containers to limit moisture pickup. It is classified as harmful by oral, dermal or inhalation exposure, may irritate the skin and eyes, and can be a skin sensitizer, so proper PPE and ventilation are required.

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