Polyeste­r acrylates are versatile­ chemicals widely used in e­nergy curing. They possess e­xceptional properties and play a pivotal role­ in various industrial applications, especially coatings, adhesive­s, and digital inks production. Polyester acrylates are known for their strong adhesion, good mechanical strength, and chemical resistance, making them suitable for demanding industrial applications.

Polyether acrylates offer higher flexibility, lower viscosity, and high reactivity which makes them ideal for low viscosity applications that require high cure speeds. Especially for flexo and inkjet applications, polyether acrylates are often considered as first candidate due to these unique features.

In UV/EB technologies, both material families are often used alongside multifunctional reactive diluents to adjust viscosity, improve processing behavior, and optimize crosslinking density for specific performance requirements. 

Key Properties of Polyester Acrylates

Polyester acrylates offer a versatile balance of mechanical performance, adhesion, and chemical resistance, with properties ranging from high hardness and durability to excellent flexibility. This broad performance profile makes them suitable for a wide variety of industrial coating applications and allows formulators to tailor the balance of hardness, adhesion, clarity and durability to the application. 

They are especially effective in formulations requiring:

• Good substrate adhesion
• High chemical resistance
• Balanced flexibility and hardness
• Excellent formulation versatility 
• Broad adhesion profile across diverse substrates 
• Adjustable flexibility-hardness balance 

Key Properties of Polyether Acrylates 

Polyether acrylates are often selected for their high reactivity and low viscosity, enabling fast cure response and formulation flexibility. Depending on the specific backbone structure, they can deliver a wide range of mechanical properties, from highly flexible to more durable cured films.

Key characteristics include:

• Fast and reliable curing
• Low viscosity and easy formulation handling
• Broad range of mechanical properties
• Versatile performance across multiple applications 

Polyester Acrylates vs Polyether

The ester groups in polyester acrylates contribute polarity and intermolecular interactions, which often translates into:

• Better adhesion
• Better solvent resistance
• Higher hardness
• Higher Tg
• Pigment wetting and increased surface hydrophobicity

 Polyether acrylates are built on a backbone formed from polyether polyol, such as polyethylene glycol, and polypropylene glycol, then capped with acrylate groups. The backbone is defined by repeating ether groups. (-C-O-C-).
 
The ether groups in polyether acrylates are generally more flexible and mobile, which often translates into:

• Lower viscosity
• Faster radical mobility during cure
• Better cure efficiency
• Greater toughness

In many UV formulations, both types are combined to achieve a balanced performance profile depending on the end-use requirements.

Applications of Polyester and Polyether Acrylates

Polyester acrylates and polyether acrylates are widely used in UV-curable systems across multiple industries.

Typical applications include:

• Industrial and protective coatings
• Wood and plastic coatings
• Printing inks and packaging
• Adhesive formulations
• Specialty UV systems requiring performance tuning