ARADUR 33225

Aradur 33225 is widely used as a curing agent in epoxy adhesive systems, composite laminates, structural bonding formulations, industrial coatings, and electrical insulation materials.
Aradur 33225 acts as a crosslinker/curing agent/hardener.
Aradur 33225 offers good mechanical properties when force cured (2 h at 60-80°C).

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® 33225, Aradur 33225, Polyamidoimidazoline Epoxy Hardener, Polyamidoimidazoline Curing Agent, Epoxy Resin Hardener, Epoxy Crosslinking Agent, Polyamidoimidazoline Crosslinker

Aradur 33225 is a polyamidoimidazoline-based curing agent (hardener), widely used for adhesives and epoxy systems.
Aradur 33225 is highly valued for its outstanding hydrophobicity, excellent latency, and very long pot life at room temperature.
Aradur 33225 is a polyamidoimidazoline-based curing agent designed for adhesives.

Aradur 33225 also functions as hardeners for low to medium Tg two-components system.
Aradur 33225 exhibits good latency at room temperature.
Aradur 33225 is a polyamidoimidazoline.

Aradur 33225 is suitable in combination with epoxy resins such as Araldite GY 250, BY 157 and BY 158 for cold-curing applications.
Aradur 33225 has to be combined with fast curing hardeners or to be force cured to achieve epoxy typical film properties.
The recommended mix ratio with Araldite GY 250 is 40-60 g/100g.

Aradur 33225 is a polyamidoimidazoline-based epoxy curing agent (hardener) developed by Huntsman Advanced Materials for high-performance epoxy resin systems.
Aradur 33225 is a low-viscosity, solvent-free curing agent designed to provide a very long pot life, excellent processing characteristics, and good latency at ambient temperature while developing high mechanical strength after elevated-temperature curing.

Aradur 33225 is particularly suitable for industrial adhesives, laminating systems, coatings, composite materials, electrical encapsulation, and specialty epoxy formulations where extended working time is required before curing.
Aradur 33225 is recommended for use with epoxy resins such as ARALDITE GY 250, ARALDITE BY 157, and ARALDITE BY 158.

Owing to its polyamidoimidazoline chemistry, Aradur 33225 offers an excellent balance between flexibility, adhesion, toughness, and chemical resistance.
Aradur 33225 is also suitable for formulations intended for potable water and food-contact applications, subject to compliance with applicable regulatory approvals and final formulation requirements.

Aradur 33225 is a proprietary commercial formulation composed of multiple chemical constituents.
Therefore, Aradur 33225 does not possess a unique CAS number, EC number, molecular formula, or molecular weight.
These identifiers apply only to individual chemical substances rather than formulated mixtures.

USES and APPLICATIONS of ARADUR 33225:
Aradur 33225 is widely used as a curing agent in epoxy adhesive systems, composite laminates, structural bonding formulations, industrial coatings, and electrical insulation materials.
Because of its exceptionally long pot life and low viscosity, Aradur 33225 is particularly suitable for large-scale composite manufacturing, resin transfer molding (RTM), vacuum infusion, filament winding, hand lay-up laminating, and structural bonding operations where extended processing time is essential.

Aradur 33225 is also employed in protective coatings, tooling systems, casting compounds, electrical encapsulation, concrete repair materials, and specialty epoxy formulations requiring high toughness and excellent adhesion.
Aradur 33225 is recommended for use with Huntsman epoxy resins including ARALDITE GY 250, ARALDITE BY 157, and ARALDITE BY 158.
In addition, Aradur 33225 can be incorporated into formulations intended for potable water contact and food-contact applications, provided that the complete formulation complies with the relevant national or international regulatory standards.

Its excellent processing characteristics also make Aradur 33225 suitable for industrial adhesive manufacturing, marine composites, transportation components, wind energy structures, and engineered composite parts requiring long processing windows and reliable curing.
Aradur 33225 acts as a crosslinker/curing agent/hardener.

Aradur 33225 offers good mechanical properties when force cured (2 h at 60-80°C).
Aradur 33225 exhibits very long pot life along with good latency at room temperature.

BENEFITS of ARADUR 33225:
Aradur 33225 provides outstanding processing flexibility through its exceptionally long pot life and low viscosity, allowing manufacturers to process large epoxy systems without premature curing.
Aradur 33225 offers excellent wetting and impregnation properties, resulting in improved fiber penetration and strong interfacial bonding in composite materials.

After heat-assisted curing, Aradur 33225 produces epoxy networks with high mechanical strength, excellent toughness, good flexibility, and durable chemical resistance.
Aradur 33225's compatibility with potable water and food-contact applications further expands its industrial versatility.
Aradur 33225's solvent-free formulation contributes to low VOC emissions and supports environmentally responsible epoxy system development.

SAFETY AND USAGE of ARADUR 33225:
Aradur 33225 should be handled using appropriate industrial hygiene and safety procedures applicable to reactive amine curing agents.
Aradur 33225 should be stored in tightly closed original containers in a cool, dry, well-ventilated location away from moisture, excessive heat, direct sunlight, and oxidizing materials.

Accurate resin-to-hardener mixing ratios should always be maintained to achieve complete curing and optimum mechanical performance.
Typical curing schedules involve elevated temperatures (approximately 2 hours at 60–80°C) to obtain the best mechanical properties.
Uncured residues should be disposed of according to local environmental regulations, while fully cured epoxy materials become highly crosslinked thermoset polymers with substantially reduced hazard potential.

TYPICAL FORMULATION (APPROXIMATE – PROPRIETARY) of ARADUR 33225:
A typical epoxy adhesive or laminating formulation using Aradur 33225 may include:
Epoxy resin: 100 parts
Aradur 33225 curing agent: 40–60 parts (recommended range depending on resin and application)
Mineral fillers or reinforcing fillers: 0–150 parts (optional)
Pigments: 0–10 parts (optional)
Flow modifiers, defoamers, or additives: 0–5 parts (optional)

CHARACTERISTICS of ARADUR 33225:
Aradur 33225 is a polyamidoimidazoline curing agent specifically engineered to provide exceptionally long working time while maintaining excellent final mechanical performance after curing.
Aradur 33225's low viscosity facilitates mixing, pumping, impregnation, and application in adhesive and composite systems.
The extended gel time allows the preparation of large epoxy batches and the manufacture of large composite structures without premature gelation.

After elevated-temperature curing, Aradur 33225 develops high mechanical strength, excellent adhesion, and durable chemical resistance.
Compared with conventional fast polyamine hardeners, Aradur 33225 offers significantly improved processing flexibility, making it especially valuable for industrial applications requiring long open time and controlled curing.
Aradur 33225 also demonstrates excellent compatibility with a wide range of epoxy resins and fillers used in structural formulations.

PHYSICAL and CHEMICAL PROPERTIES of ARADUR 33225:
Physical state: Liquid
Appearance: Clear to amber liquid
Odor: Characteristic amine odor
Chemical family: Polyamidoimidazoline
Product type: Epoxy curing agent
Cure mechanism: Epoxy–amine addition reaction
Solvent-free formulation
Viscosity (25°C): 100–400 mPa·s
Amine value: 240–310 mg KOH/g

Active Hydrogen Equivalent Weight (AHEW): 75–115 g/eq
Gel time (23°C, with ARALDITE® GY 250): Approximately 900 minutes
Gardner color: ≤12
Density (25°C): Approximately 0.97–1.03 g/cm³ (typical for this product class)
Low viscosity
Very long pot life
Good latency at room temperature
Excellent processability
Excellent compatibility with liquid epoxy resins

Excellent wetting characteristics
Good penetration into porous substrates
Good flow and leveling
High curing efficiency
High crosslink density after cure
Good flexibility
High toughness
Good impact resistance

Good mechanical strength after force curing
Low curing shrinkage
Good dimensional stability
Good adhesion to metals, concrete, wood, ceramics, composites, and mineral substrates
Good moisture resistance after complete cure
Good water resistance
Good resistance to dilute acids and alkalis
Good resistance to oils, greases, fuels, and many industrial chemicals

Suitable for heat-assisted curing (typically 2 hours at 60–80°C)
Stable under recommended storage conditions
Product: ARADUR® 33225
Manufacturer: Huntsman Advanced Materials
Chemical family: Polyamidoimidazoline
Function: Epoxy curing agent / hardener / crosslinker
Low viscosity
Very long pot life

Good latency at room temperature
Good mechanical properties after force curing (2 h at 60–80°C)
Suitable for potable water and food-contact applications (uygun sertifikasyonlarla)
Recommended with Araldite® GY 250, BY 157 and BY 158 epoxy resins
Recommended mix ratio with Araldite® GY 250: 40–60 g hardener / 100 g resin
Viscosity (25°C): 100–400 mPa·s
Amine value: 240–310 mg KOH/g
Active Hydrogen Equivalent Weight (AHEW): 75–115 g/eq

Gel time (with ARALDITE® GY 250): ≈900 min
Gardner color: ≤12
Chemical type: Polyamidoimidazoline
Product family: Crosslinkers / Curing Agents / Hardeners
Chemical family: Amides|Amines
Product Type: Additives
Product Name: ARADUR® 33225
Product Type: Epoxy Curing Agent / Hardener

Chemical Family: Polyamidoimidazoline
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: Liquid
Cure Mechanism: Epoxy–amine addition reaction

FIRST AID MEASURES of ARADUR 33225:
-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 33225:
-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 33225:
-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 33225:
-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 33225:
-Conditions for safe storage, including any incompatibilities:
*Storage conditions:
Tightly closed. 
Dry.

STABILITY and REACTIVITY of ARADUR 33225:
-Chemical stability:
The product is chemically stable under standard ambient conditions (room temperature).
-Possibility of hazardous reactions:
No data available