ARADUR 20250

Aradur 20250 is used in formulation with a high binder content, degree of residual tackiness and smearing.
Aradur 20250 is primarily used as a fast-curing hardener and accelerator in two-component epoxy adhesive systems designed for construction, civil engineering, and industrial assembly.

CAS Number: Mixture (no single CAS number assigned)
EC Number: Mixture (no single EC number assigned)
Molecular Formula: Not applicable (proprietary formulated mixture/UVCB)
Molecular Weight: Not applicable (mixture)

SYNONYMS:
ARADUR® 20250, Aradur 20250, Formulated Polyamine Hardener, Polyamine Curing Agent, Polyamine Accelerator, Epoxy Hardener, Epoxy Curing Agent, Fast-Cure Polyamine Hardener

Aradur 20250 is a curing agent and hardener.
Aradur 20250 is a formulated polyamine for fast cure and processes requiring low viscosity.
Aradur 20250 shows good adhesion to most substrates.

Aradur 20250 has low viscosity and fast hardener for room temperature cure.
Low-toxicity hardener free of DETA and Bis A, Aradur 20250 is used as an accelerator in combination with other curing agents.
Aradur 20250 is a polyamidoamine-based curing agent.

Aradur 20250 is a BzOH-free grade.
Aradur 20250 exhibits low viscosity.
Aradur 20250 is particularly suitable at low working temperatures.
Aradur 20250 is a formulated polyamine-based epoxy curing agent (hardener) and accelerator developed by Huntsman Advanced Materials.

Aradur 20250 is specifically designed for fast-curing two-component (2K) epoxy adhesive systems, repair mortars, concrete injection systems, and structural bonding applications.
Unlike conventional polyamine hardeners, Aradur 20250 combines very high reactivity with very low viscosity, enabling rapid strength development while maintaining excellent penetration into porous substrates.

Aradur 20250 is plasticizer-free, VOC-free, SVHC-free, benzyl alcohol-free, DETA-free, and Bisphenol A-free, making it a modern replacement for obsolete curing agents such as Aradur 2958.
Aradur 20250 is particularly suitable for applications requiring high modulus, excellent adhesion, low shrinkage, and outstanding performance under both static and dynamic loading conditions.

USES and APPLICATIONS of ARADUR 20250:
Aradur 20250 is used in formulation with a high binder content, degree of residual tackiness and smearing.
Aradur 20250 is primarily used as a fast-curing hardener and accelerator in two-component epoxy adhesive systems designed for construction, civil engineering, and industrial assembly.

Aradur 20250 is extensively employed in structural concrete bonding, crack injection systems, repair mortars, anchoring compounds, and high-performance structural adhesives where rapid curing and high mechanical strength are essential.
Aradur 20250 is particularly effective for bonding concrete, mortar, masonry, and mineral substrates due to its excellent penetration and outstanding adhesion.

Beyond construction applications, Aradur 20250 is suitable for industrial maintenance adhesives, machinery assembly, composite repair, precast concrete manufacturing, infrastructure rehabilitation, and heavy-duty repair systems.
Aradur 20250's rapid ambient-temperature curing enables faster production cycles, reduced downtime, and earlier return to service.

Because of its low viscosity and excellent wetting ability, Aradur 20250 is also well suited for low-viscosity injection resins used to repair structural cracks and reinforce damaged concrete.
Aradur 20250 is frequently incorporated into high-performance epoxy formulations requiring low shrinkage, high stiffness, and long-term durability under dynamic mechanical loading.

BENEFITS of ARADUR 20250:
Aradur 20250 provides exceptionally fast room-temperature curing while maintaining low viscosity for easy processing and excellent substrate penetration.
Aradur 20250's formulation delivers outstanding adhesion to concrete, mortar, and many other construction materials, resulting in durable structural bonds with high mechanical strength.

The cured systems exhibit very high modulus, low shrinkage, and excellent resistance to dynamic loading, making them suitable for demanding structural applications.
The absence of benzyl alcohol, bisphenol A, DETA, plasticizers, VOCs, and SVHC substances improves occupational safety and regulatory compliance while reducing environmental impact.
Aradur 20250's high reactivity allows shorter curing cycles, increased production efficiency, and faster commissioning of repaired or bonded structures.

CHARACTERISTICS of ARADUR 20250:
Aradur 20250 is a modern, highly reactive formulated polyamine curing agent specifically engineered for rapid ambient-temperature curing of epoxy systems.
Aradur 20250's exceptionally low viscosity allows excellent substrate wetting and easy incorporation into adhesive and repair formulations while maintaining very high reactivity.
The formulation was developed to replace older curing agents by eliminating hazardous components such as bisphenol A, benzyl alcohol, DETA, plasticizers, and substances of very high concern (SVHCs).

The cured epoxy systems exhibit a very high modulus, excellent adhesion, low curing shrinkage, and outstanding mechanical performance under both static and cyclic loading conditions.
Because of its rapid strength development and low toxicity profile, Aradur 20250 is particularly attractive for structural construction, repair, and industrial adhesive applications requiring fast turnaround times.

PHYSICAL and CHEMICAL PROPERTIES of ARADUR 20250:
Physical state: Liquid
Appearance: Clear liquid
Color: Colorless to pale yellow (typical)
Odor: Characteristic amine odor
Chemical family: Polyamines
Product type: Formulated polyamine blend
Cure mechanism: Epoxy–amine addition reaction
Viscosity (25°C): 130–210 mPa·s
Amine value: 1010–1170 mg KOH/g
Gel time (23°C, ARALDITE® GY 250): Approximately 16 minutes
Glass transition temperature (Tg): 110–130°C (depending on formulation)
Physical form: Clear liquid
Low viscosity

High reactivity
Fast room-temperature curing
High modulus after cure
Excellent adhesion to numerous substrates
Low shrinkage during polymerization
Excellent dynamic load resistance
Excellent mechanical strength
Good penetration into porous mineral substrates
Excellent wetting characteristics
Suitable for solvent-free epoxy formulations
VOC-free
Plasticizer-free

Benzyl alcohol-free
Bisphenol A-free
DETA-free (diethylenetriamine-free)
SVHC-free
Good compatibility with epoxy resins
Excellent processing characteristics
Suitable for thin-layer and thick-section applications
Stable under recommended storage conditions
Designed for ambient-temperature curing

Low toxicity compared with conventional fast polyamine hardeners
High crosslink density after curing
Produces rigid, high-strength epoxy networks
Excellent dimensional stability after cure
Good long-term durability
Product family: Crosslinking / Curing / Vulcanizing Agents
Chemical family: Polyamines|Amines
Product Type: Additives
Amines, polyethylenepoly-, tetraethylenepentamine fraction

Product Name: ARADUR® 20250
Product Type: Formulated Polyamine Curing Agent / Hardener / Accelerator
Chemical Family: Polyamines (Chemical Mixtures & Blends)
CAS Number: Mixture (no single CAS number assigned)
EC Number: Mixture (no single EC number assigned)
Molecular Formula: Not applicable (proprietary formulated mixture/UVCB)
Molecular Weight: Not applicable (mixture)
Physical Form: Clear liquid
Cure Mechanism: Epoxy–amine addition reaction

FIRST AID MEASURES of ARADUR 20250:
-Description of first-aid measures
*General advice:
Show this material safety data sheet to the doctor in attendance.
*If inhaled:
After inhalation: 
Fresh air.
*In case of skin contact: 
Take off immediately all contaminated clothing. 
Rinse skin with
water/ shower.
*In case of eye contact:
After eye contact: 
Rinse out with plenty of water. 
Call in ophthalmologist. 
Remove contact lenses.
*If swallowed:
After swallowing: 
Immediately make victim drink water (two glasses at most). 
Consult a physician.
-Indication of any immediate medical attention and special treatment needed.
No data available

ACCIDENTAL RELEASE MEASURES of ARADUR 20250:
-Environmental precautions:
Do not let product enter drains.
-Methods and materials for containment and cleaning up:
Cover drains. 
Collect, bind, and pump off spills. 
Observe possible material restrictions. 
Take up dry. 
Dispose of properly. 
Clean up affected area.

FIRE FIGHTING MEASURES of ARADUR 20250:
-Extinguishing media:
*Suitable extinguishing media:
Carbon dioxide (CO2) 
Foam 
Dry powder
*Unsuitable extinguishing media:
For this substance/mixture no limitations of extinguishing agents are given.
-Further information:
Prevent fire extinguishing water from contaminating surface water or the ground water system.

EXPOSURE CONTROLS/PERSONAL PROTECTION of ARADUR 20250:
-Control parameters:
--Ingredients with workplace control parameters:
-Exposure controls:
--Personal protective equipment:
*Eye/face protection:
Use equipment for eye protection. 
Safety glasses
*Body Protection:
protective clothing
*Respiratory protection:
Recommended Filter type: Filter A 
-Control of environmental exposure:
Do not let product enter drains.

HANDLING and STORAGE of ARADUR 20250:
-Conditions for safe storage, including any incompatibilities:
*Storage conditions:
Tightly closed. 
Dry.
 

STABILITY and REACTIVITY of ARADUR 20250:
-Chemical stability:
The product is chemically stable under standard ambient conditions (room temperature).
-Possibility of hazardous reactions:
No data available