Photoinitiators, also known as photosensitizers or curing agents, are a type of compound that can absorb energy at a certain wavelength in the ultraviolet (250-420nm) or visible (400-800nm) region, produce free radicals, cations, etc., and thus initiate monomer polymerization, crosslinking, and curing. Today we will talk about the photoinitiator 819 product.
Photoinitiator 819 is an efficient photoinitiator suitable for initiating radiation polymerization reactions of unsaturated resins under ultraviolet light irradiation, especially suitable for white formulations and glass fiber reinforced polyester/styrene systems, as well as for outdoor varnish systems in combination with light stabilizers.
Basic information of photoinitiator 819 chemicals:
Product Name | Photoinitiator 819 |
Other Name | Phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide; UV 819; IRGACURE 819; Uv Photoinitiator 819 |
CAS | 162881-26-7 |
Molecular formula | C26H27O3P |
Molecular weight | 418.46 |
Density | 1.19 g/cm3 |
Melting point | 127 ~ 131.5℃ |
Boiling point | ≥168℃ |
Appearance | yellow powder |
Content | ≥ 98% (liquid chromatography) |
Vapour pressure | 5 × 10-10 kPa (25 ℃) |
UV absorption peak | 295, 370nm |
Composite application of photoinitiator 819
IRG 819 can be used in conjunction with other photoinitiators, such as IRG 184 or IRG 651
The combination of IRG 819 and IRG 651 is particularly suitable for curing polyester/styrene resin systems, such as in fiberglass reinforcement materials.
Due to its absorption in the long wavelength range, IRG 819 can be used in combination with UV absorbers such as TINUVIN 400, making it suitable for UV cured coatings that require weather resistance.
Recommended dosage:
Transparent acrylic and unsaturated polyester/styrene coatings 0.1-0.2% IRG 819+1-2%
IRG 184
White acrylic and unsaturated polyester/styrene coatings 0.5-1% IRG 819+1-2%
IRG 184
Colored acrylic formula 0.5-1% IRG 819+1-2% IRG 184
White screen printing ink 0.5-1.5% IRG 819+1-2% IRG 184
Fiberglass reinforced unsaturated polyester/styrene prepreg 0.1-0.2% IRG 819
What are the applications of photoinitiator 819?
Photoinitiator 819 is a commonly used chemical substance commonly used in the field of photocuring. Photopolymerization is a technique that uses ultraviolet or visible light to initiate chemical reactions. Photoinitiator 819 is commonly used as an initiator in photocurable materials to initiate UV polymerization reactions in unsaturated prepolymer systems. Mainly applied in the following fields:
Ink printing: In UV ink, photoinitiator 819 can help ink solidify quickly, improve printing speed and production efficiency.
Coatings: Used in UV coating systems, it can achieve rapid curing and hardening of coatings, improving their wear resistance and weather resistance.
Adhesive: In UV or LED light cured adhesives, photoinitiator 819 can promote the curing reaction of the adhesive, improve bonding strength and durability.
UV cured resin: can be used to prepare UV cured resins, such as UV cured coatings, UV cured adhesives, UV cured adhesives, etc.
Overall, photoinitiator 819 plays an important role in promoting curing reactions in the field of photopolymerization, and can be used in various coatings, inks, adhesives, and resin systems that require rapid curing and hardening.