Guangdong Bossin Novel Materials Technology Co.,Ltd.
Mrs. Xia:+86 13609745928
TEL:020-34379001
Fax:020-34379190
Website:en.gdbossin.com
Address: 802 Room,8 Floor,Pazhou Industrial Park B,8th St Haicheng East,Xingang East Rd,Haizhu District,Guangzhou
What is UV Photoinitiator?
Photoinitiator, also known as photosensitizer or photocuring agent, is a compound that can produce reactive species after absorbing a certain wavelength energy. These reactive species are capable of initiating or catalyzing chemical reactions, which then trigger the monomers or oligomers to undergo polymerization. This process is called photopolymerization or radiation curing or photocuring, the light used as the energy provider is most often Ultraviolet, that’s why photoinitiator often refers to UV photoinitiator.
UV Photoinitiator is the essential composition of all UV curable resin systems, it transforms a soluble liquid formulation into a hard and insoluble crosslinked polymer network. The cured coating is chemically and physically resistant and is used both to protect and decorate substrates such as plastics, wood and metal.
Photocuring technology is a new energy-saving and environment-friendly technology. The light source (most commonly is Ultraviolet, sometimes visible light), used in radiation curing is fully in line with the “5E” characteristics: Efficient, Enabling, Economical, Energy Saving, Environmental Friendly. Therefore, it is known as “green technology’, and widely used in UV-curable paints, coatings, inks, adhesives industries.
Photoinitiators can be classified into two categories, according to the initiation mechanism. There are free radical initiators and cation initiators.
A photoinitiator should exhibit several properties, from which the most important are:
*High absorption at the exposure wavelength and high molar extinction coefficient.
*High quantum yield of formation of initiating species.
*High reactivity of the radical towards the monomer.
Photoinitiators tend to make up a few percentage of the formulation, but the cost represents a much higher proportion of the formulation. The photoinitiator type is chosen for the absorption to be maximized to match the output of the UV source being used.The most commonly used photoinitiators include: 1173, TPO, 369, 819, 184 etc.
The most commonly used photoinitiators include:
Product | Chemical Name | Apperance | Weight | Absorption Wavelength | Characteristics | Applications |
184 | 1-Hydroxycyclohexyl Phenyl | White crystals | 204.3 | 246 | High-efficient | Used for varnish for plastic, matal |
1173 | 2-Hydroxy-2-Methyl-Phenyl- | Light yellow clear liquids | 164.2 | 245 | High-efficient | Used for varnish for plastic, matal |
TPO | 2,4,6-Trimethylbenzoyldiphenyl | Light yellow solid | 348.4 | 295 | High-efficient; | Used for varnish for plastic, matal |
TPO-L | 2,4,6-Trimethylbenzoyldi- | Yellow liquid | 316.3 | 242 | Low odor; | Used for varnish for plastic, matal |
2-Isopropylthioxanthone | Light yellow solid | 254.1 | 255 | High-efficient; | Used for UV inks | |
369 | 2-Benzyl-2-(dimethylamino)-1- | Light yellow powder | 366.5 | 233 | Wide sensitive range and good UV absorption ability; | Used for UV inks; Suitable for dark-color fast-curing system |
(BDK) | Benzil Dimethyl Ketal | White crystals | 256.3 | 250 | Coloured; | UV paint for plastic and metal; PCB ink |
819 | PHenylbis(2,4,6-Trimethyl-Benzoyl) PHosPHine Oxide | Yellow powder | 418.4 | 295 | High-efficient; | Use for UV inks and paint. |
907 | 2-Methyl-1-[4(Methylthio)Phenyl] | White powdered crystal | 279.4 | 232 | Coloured; | Use for UV inks. |
BP | Benzophenone | White flake solid | 182.2 | 253 | Surface curing; | Used for varnish for plastic, matal |
4-Benzoylbiphenyl | White powder | 258.3 | 289 | Surface curing; | Used for varnish for plastic, matal | |
BI-750C | New photoinitiator | Light yellow clear liquids | - | - | Low odor; | Used for UV inks,UV Coating,UV adhesive |
Mrs. Xia:+86 13609745928 TEL:020-34379001 Fax:020-34379190 Website:en.gdbossin.com
Address: 802 Room,8 Floor,Pazhou Industrial Park B,8th St Haicheng East,Xingang East Rd,Haizhu District,Guangzhou