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1. What is Anthracure^®
2. Unique UV light absorption
3. Example of application
4. Example of use
5. Packaging(USV-1331)
6. High-solubility sensitizer(UVS-1221)
7. Other sensitizers

1. What is Anthracure^®

• Anthracure^® is a photosensitizer for UV cationic polymerization.
• Anthracure^®UVS-1331 has been registered for REACH and MITI in Japan.
• Anthracure^®UVS-1101 has been listed on TSCA Inventry.
• Anthracure^® accelerates the curing speed of UV cationic curing system.
• Anthracure^® provides film with smooth surface and strong adhesiveness.
• Anthracure^® enables thick layer curing in UV cationic system.
• USV-1331 and USV-1101 have the same character as a photo sensitizer.

2. Unique UV light absorption

UV-spectrum of UVS-1331

UVS-1331 absorbs the light with long wavelength, 400nm or over.
UVS-1331 can be excited by 400nm light and transfer its excited energy to initiators efficiently, therefore curing continues in thick polymerization system.

UV-spectrum of USV-1101 is the same as USV-1331

3. Example of application

4. Example of use

･ Alicyclic epoxy resin   : UVR-6105 (Dow Chemicals) ･ Initiator   : UVI-6992 (Dow Chemicals)   : Irgacure250 (Ciba Specialty Chemicals) ･ Film thickness : 12micron ･ Light source : LED(Made by SANDER, 20mW × 6pieces) ･ Wavelength : 395nm ･ Intensity : 0.2mW/cm2

• Irradiation of 395 nm monochromatic light does not initiate curing even in the presence of onium salt initiator alone.
• Addition of Anthracure^® enables curing to be initiated at a practically available rate.

5. Packaging (USV-1331)

1kg bottle	25kg paper bag

6. High-solubility sensitizers

Anthracure^® UVS-1221：9,10-dipropoxyanthracene

• UVS-1221 is a sensitizer with high solubility in solvents.
• UVS-1221 exhibits a similar sensitizing effect to that of UVS-1331.

7. Other sensitizers

KKC also produces sensitizers with different alkyl groups from those of the above-mentioned UVS-1331,UVS-1101 and UVS-1221. Moreover, KKC is developing sensitizers with reactive substituents instead of alkyl groups, and those sensitive to a longer wavelength UV-light. Please inquire about our sensitizers for UV curing.