Photoinitiators, also known as photosensitizers or photocuring agents, are a type that can absorb energy of a certain wavelength in the ultraviolet light region (250-420nm) or visible light region (-800nm) to produce free radicals, cations, etc., thereby triggering A compound that is polymerized, cross-linked and solidified by monomers is an efficient, environmentally friendly, energy-saving and widely applicable material handling and processing technology, and is known as a new technology for green industry in the 21st century.
Photoinitiators can be divided into cationic polymerization photoinitiators and free radical polymerization photoinitiators according to the initiation mechanism. According to the absorption radiation length, they can be divided into ultraviolet photoinitiators and visible light initiators.
There are many photoinitiator products. The current mainstream photoinitiator varieties in the industry are 907, TPO, 184, 1173, DETX, ITX, 369, etc. Different types of photoinitiators have different molecular structures and thus different properties. For example, 907 is used in colored systems when used with ITX or DETX photoinitiators, and is mainly used in PCB inks, adhesives, printing inks, home decoration and other fields.
Data source: Guanyan Report Network’s “2021 China Photoinitiator Market Analysis Report – Industry Competition Status and Development Prospects Forecast” Currently, 1173 and 184 are the photoinitiators with the largest application scale in the domestic market. The proportions are 20% and 17% respectively.
Today, Xiao K uses BASF photoinitiator DAROCUR 1173 and OMNIRAD 184 as examples to explain the difference between photoinitiators 1173 and 184:
The product performance difference between photoinitiator 184and 1173:
Germany BASF photoinitiator IRG184 is a highly efficient non-yellowing UV Initiator, used to initiate photopolymerization of unsaturated prepolymerization systems. For example: prepolymerization system of acrylic resin and other mono- or multi-functional reactive monomers. Use TINUVIN 292 for improvement.
BASF photoinitiator DAROCUR 1173 is a high-efficiency liquid universal UV photoinitiator, used to initiate photopolymerization of unsaturated prepolymerization systems. For example: prepolymerization system of acrylic resin and other mono- or multi-functional reactive monomers. It is miscible with most organic solvents used in coatings and acrylic monomers at a ratio of greater than 50%, and is easily miscible in water. Tests have proven that it can be applied to acrylic light-curing varnish systems coated on paper, metal and plastic surfaces. Since BASF Photoinitiator 1173 is liquid and has good miscibility, it is suitable for use in combination with other photoinitiators.
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Germany BASF photoinitiator DAROCUR 1173 is particularly recommended for UV curing coatings that need to withstand long-term sunlight and require minimal yellowing. The yellowing problem of polyurethane/acrylic acid system can be improved by using Tianlaiwen 292 together.
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The difference in product characteristics between photoinitiators 1173 and 184:
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Photoinitiator DAROCUR 1173 has good miscibility and is suitable for use in combination with other photoinitiators
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Photoinitiator IRG 184Not recommended for those that need to withstand long-term sun exposure and require good yellowing degenerationsmallThe yellowing problem of polyurethane/acrylic acid systems in UV curing coatings can be solved through coordination
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Product application differences between photoinitiators 1173 and 184:
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DAROCUR 1173 Can be used in acrylic light-curing varnish systems coated on paper, metal and plastic surfaces
BASF photoinitiator IRG184 can be used in acrylic coatings on paper, metal and plastic surfaces Light-curing varnish system
