Product Overview
AM-322M is a 1,6-hexanediol dimethacrylate (HDDMA) monomer designed for UV/EB curing systems. Its CAS number is 6606-59-3. As a difunctional methacrylate monomer, AM-322M combines low viscosity with good crosslinking efficiency, making it suitable for coatings, inks, adhesives, and inkjet formulations.
HDDMA has a linear C6 alkylene chain between two methacrylate groups. This structure gives cured films a balance of hardness, flexibility, chemical resistance, and low polymerization shrinkage. AM-322M is compatible with a wide range of acrylic, polyester, epoxy, and pure acrylic resins, as well as common organic solvents.
Typical Technical Data
| Property | Typical Value |
|---|---|
| Product Name | AM-322M |
| Chemical Name | 1,6-Hexanediol Dimethacrylate |
| Abbreviation | HDDMA |
| CAS No. | 6606-59-3 |
| EINECS No. | 229-551-7 |
| Molecular Formula | C₁₄H₂₂O₄ |
| Molecular Weight | 254.32 g/mol |
| Functionality | 2 |
| Appearance | Clear liquid |
| Viscosity at 25°C | 4–9 cP·s |
| Tg | 55°C |
| Surface Tension | 34.3 dyn/cm |
| Refractive Index | 1.456 |
| Acid Value | ≤0.5 mg KOH/g |
| Color, Gardner | 1 |
These values are typical and should not be used as strict specifications. Please refer to the latest TDS and COA for batch-specific data.
Key Features
Difunctional methacrylate monomer: Provides crosslinking in UV/EB systems.
Low viscosity: Helps reduce overall formulation viscosity and can improve processing.
Low shrinkage: Suitable for systems where dimensional stability is important.
Good heat and weather resistance: Supports durable cured films.
Chemical resistance: Cured films show good resistance to acids, bases, and many organic solvents.
Broad compatibility: Compatible with many monomers, oligomers, solvents, and resins.
Applications
UV Coatings
AM-322M is used in UV coatings for plastic, metal, and wood substrates. It provides good adhesion and weatherability. Cured films can achieve good hardness and abrasion resistance. Because of its low shrinkage, it is also suitable for coating systems that require dimensional precision.
UV Inkjet
In UV inkjet formulations, AM-322M can be used as a co-monomer. It helps reduce system viscosity and improve pigment wetting. It is typically used at lower levels to balance viscosity, cure speed, and film properties.
UV Adhesives and Sealants
AM-322M provides good adhesion in reactive adhesives and sealant systems. It can be used as a crosslinking monomer to improve cohesion and durability.
UV Inks
As a methacrylate crosslinking monomer, AM-322M is used in UV inks that require good adhesion, chemical resistance, hardness, and abrasion resistance.
Compatibility
AM-322M is compatible with a wide range of monomers. It dissolves well in common organic solvents. It is also compatible with pure acrylic, polyester, epoxy, and acrylic resins. Formulators can adjust the ratio of AM-322M to balance viscosity, cure speed, hardness, flexibility, and adhesion.
Safety and Handling
AM-322M is a methacrylate monomer. It should not be described as a low-irritation or non-irritating material. Like many methacrylate monomers, HDDMA is classified as a skin and eye irritant and a skin sensitizer. Avoid contact with skin and eyes. Wear suitable protective gloves, safety glasses or goggles, and protective clothing. Use in a well-ventilated area. Do not breathe mist or vapor. Wash thoroughly after handling.
Please always refer to the Safety Data Sheet (SDS) for complete hazard, first-aid, and handling information before use.
Storage
Store AM-322M in a cool, dry, well-ventilated place away from heat, sparks, and open flames. Keep containers tightly closed when not in use. Protect from light and moisture. Avoid prolonged exposure to air. For shelf life and specific storage recommendations, refer to the current SDS and COA.
FAQ
What is AM-322M?
AM-322M is a 1,6-hexanediol dimethacrylate (HDDMA) monomer with CAS number 6606-59-3. It is a difunctional methacrylate monomer used in UV/EB curing systems.
What is the viscosity of AM-322M?
The typical viscosity is 4–9 cP·s at 25°C.
What is the Tg of AM-322M?
The typical glass transition temperature (Tg) is 55°C.
Is AM-322M low irritation?
No. AM-322M should be handled as a skin and eye irritant and a skin sensitizer. Always use appropriate personal protective equipment and follow the SDS.
What applications use AM-322M?
It is commonly used in UV coatings, UV inks, UV inkjet formulations, UV adhesives, and sealants.
What is the typical use level?
Use level depends on the formulation. AM-322M can be used as a reactive diluent or crosslinking monomer. Laboratory trials are recommended to determine the best dosage.
Is AM-322M compatible with acrylic resins?
Yes. It is compatible with pure acrylic, polyester, epoxy, and acrylic resins, as well as many monomers and common organic solvents.
Conclusion
AM-322M (HDDMA) is a difunctional methacrylate monomer for UV/EB curing systems. It offers low viscosity, low shrinkage, good compatibility, and useful film properties for coatings, inks, adhesives, and inkjet applications. For formulation support, samples, TDS, or SDS, please contact us.
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