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Introduction about several photoinitiators

Introduction about several photoinitiators2016.11.15

Photoinitiators is also called photosensitizer or light curing agents. It is a kind of energy absorbing certain wavelengths in ultraviolet light (250~420nm) or visible region (400~800nm) and produce free radicals and cations, thus it triggers polymerization of cross-linked compounds.

Here are several commonly used photoinitiators from OKCHEM

Photoinitiator 184

photoinitiator-184-%e5%9b%be1

Product Name : l-Hydroxy-Cyclohexyl-Phenyl-Ketone

Molecular Weight : 204.3

CAS No. : 947-19-3

Appearance: white crystalline powder

Melting point (°C) : 44-48

Applications: 184 applied to copying varnishes, plastics, paint, wood paint, adhesives, offset inks, screen printing inks, flexographic inks, electronic products. Generally, added with other photo-initiator. It can be used with UV absorbers if required. 2-5%w/w is recommended.

As highly efficient photoinitiator for UV curable systems, it provides non-yellowing durability and longer shelf life for UV curable systems.

Photoinitiator TPO

Product Name : 2,4,6-Trimethylbenzoyldiphenylphosphine oxide

Molecular Weight : 348.38

CAS No. : 75980-60-8

Melting point (°C) : 91-94

Appearance : Light yellow crystalline powder

Applications: TPO is an effective photoinitiator for UV-curable based coatings, adhesives, inks and printing plates. It can make white paint and thick coating (TiO2 as white pigment) fully cured. TPO is a powerful free radicals (I) type of photoinitiator, especially suitable for coloured system and areas of thick film curing. 0.5-4%w/w is recommended.

Photoinitiator 819

Product Name : Phenyl bis(2,4,6-trimethylbenzoyl)-phosphine oxide

Molecular Formula : C26H27O3 P

Molecular Weight : 418.46

CAS No. : 162881-26-7

Melting point (°C) : 127-132

Applications: It can be used in UV-curable varnish and paint system, such as wood, paper, matel, plastic, printing ink, etc. Usually, it will be used together with 184 and BDK.

Photoinitiator 1173

Product Name : 2-Hydroxy-2-Methyl-Phenyl-Propane-1-one

Molecular Formula : C10H12O2

Molecular Weight : 164.2

CAS No. : 7473-98-5

Appearance : Colorless to pale yellow and clear liquid

Applications: As a liquid photoinitiators, 1173 has a very good compatibility and can easily mix with other photo-initiator and prepolymer. 1173 is a photoinitiator for UV curing acrylic resin for coating wood, metal, paper and plastic etc. It provides non-yellowing durability and longer shelf life for UV curable systems.

NOTE

The above information is provided as guidelines only. It is important that the customers evaluate any product in their own system to determine suitability.

If you want to know more details of photoinitiators, send us email to marketing@okchem.com or follow us linkedin page here, hope this can help you, thanks!

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