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Amine synergists are also called photosensitizers. Photosensitizers are molecules that do not absorb radiation or initiate polymerization reactions but can increase the effective rate of photoinitiator activity. These acrylated amine synergists are usually amine compounds. The role of amine synergist is to increase the photosensitivity of photoinitiator and accelerate the curing of the system.

The amine synergist uv curing acts as an active hydrogen donor to excite the photoinitiator. Abstraction of hydrogen generates very reactive alkylamino radicals, which subsequently initiate polymerization.

TINTOLL is one of the leading photoinitiator manufacturers, which is also one of the cornerstone businesses of TINTOLL. Our product portfolio covers free radical and cationic photoinitiators (photo-acid generators) as well as amine synergists. UV-curable materials are widely used in graphic arts, industrial coatings, adhesives, printed circuit boards, and 3D printing. TINTOLL provides application support, product development and custom solutions, and collaborates with customers to develop next-generation photoinitiators.

Types of Amine Synergists
PowerCure™ ASA
CAS No. 71512-90-8
Poly(ethylene glycol) bis(p-dimethylaminobenzoate).
PowerCure™ 198
CAS No. 925246-00-0
1,1′-[(Methylimino)di-2,1-ethanediyl] bis[4-(dimethylamino)benzoate].
PowerCure™ EDB
CAS No. 10287-53-3
Ethyl-4-(dimethylamino) benzoate.
PowerCure™ EHA
CAS No. 21245-02-3
2-Ethylhexyl 4-dimethylaminobenzoate.
PowerCure™ NPG
CAS No. 103-01-5
Phenylacetic acid.

Application of Amine Synergists
Photopolymerization: Amine synergists including 2 ethylhexyl 4 dimethylaminobenzoate are commonly used in photopolymerization processes, such as ultraviolet (UV) curing and electron beam (EB) curing. They accelerate the activity of photoinitiators by providing an active source of hydrogen, leading to the rapid curing of polymer materials. These applications are prevalent in printing, coatings, adhesives, and 3D printing.

Adhesives: Amine synergists are employed in the formulation of high-viscosity adhesives with strong bonding capabilities. They expedite the curing of adhesives, ensuring quick and robust bonds, often used in automotive assembly and electronics manufacturing.

Coatings: In the coatings industry, amine synergists are utilized to prepare fast-drying coatings, enhancing the speed of curing and surface quality. This is especially valuable in automotive painting, woodworking coatings, and interior decor.

Printing: In the printing sector, amine synergists are used to accelerate ink curing, improving printing speed and quality. They also help reduce the use of volatile organic compounds (VOCs) during the printing process.

Medical Devices: Amine synergists are crucial in the curing of polymers in medical devices, such as dental composites and medical adhesives. They ensure the efficient fabrication of dental restorations and medical implants.

Electronics Materials: In the electronics industry, amine synergists are applied to produce electronic encapsulation materials, ensuring the rapid curing of encapsulating materials and maintaining their performance.