Properties of new photoinitiators

UV-curable technology due to its advantages of energy conservation and environmental protection is widely used in paints, printing inks, adhesives and other areas. Photoinitiator is an important part of UV curing system, and its development and progress play an important role in progress of the UV curable products.

UV-curing refers to the UV energy, induced reaction of liquid materials quickly turned into a solid process, it commonly used in paints, printing inks, adhesives and other preparation. Compared with the General methods of curing, UV-curable has the advantages of high curing speed, without heat, little-used solvents, high efficiency, energy saving and the automation curing process.

According to the reaction mechanism is different, photoinitiators are divided into free radical polymerization photoinitiator and cationic polymerization photoinitiator. History of the study on free radical polymerization photoinitiator is long, it mainly contain chromophores of compounds, especially compounds contains a benzene ring attached to Carbonyl, including phenethyl benzoate and its derivatives, ketones, aromatic ketones, acyl-phosphine oxide, etc.

Acyl-phosphine oxide material as a new photoinitiator for its excellent performance in coatings, inks, adhesives are widely used in industries. It has more absorption in the ultraviolet and visible region, and it can be more effective than other photo-initiator triggered curing for coating systems containing pigments. Acyl-phosphine oxide photoinitiator can be used for more strict with the yellowing of the occasion, such as: white, light colored inks and coatings, etc. In addition, the acyl phosphine oxides have a bleaching effect on light.

Compared with traditional solvent-borne UV-curing system, water soluble UV curing system has the following advantages: water for thinner viscosity, easy to adjust, no odor and does not irritate the skin, it contains no volatile organic compounds, as well as to reduce environmental pollution. To development water-soluble photoinitiators that is adapted to water-soluble light curing system phase, Anion-cation radical or hydrophilic non-ion base is introduced to the original of solvent type light raised agent structure, then series of water-soluble photoinitiators have been developed., such as benzene methyl ketone carboxylic acid salt.

UV-curable technology is a new generation of green technology that is superior to traditional curing technology. The excellent product performance is widely used in paints, printing inks, adhesives and other aspects. As an important component of UV-curing technology, photo-initiator of development and progress in development of UV-curing technology has important implications, and technological advances are increasingly new requirements for the development of the photoinitiators. Click Here!