Spectra Group Limited H-Nu 535
- CAS Number
- 142189-38-6
- Chemical Name
- 2457-tetraiodo-6-hydroxy-3-fluorone
Spectra Group Limited H-Nu 535 initiates both free-radical and cationic photopolymerization, using a different set of co-initiators depending on the polymerization process • Type II photinitiator: H-Nu 535 acts as a light harvester, followed by energy or electron transfer to a co-initiator molecule; produced reactive species activate photopolymerization • Commercial photoinitiator, non-toxic (LD50>2500 mg/kg).
Properties
- Physical Form
- Powder
- Solid
Identification
- CASE Ingredients Features
- Fast CureFaster Cure TimeFaster Tack Free TimeNon-Yellowing GradeYellowing ResistanceYellowing Stability
- CASE Ingredients Functions
- Photoinitiator
Product families
- Catalysts & Initiators
Other characteristics
- End Uses
Radiation Curable Adhesive, Radiation Curable Coating, Radiation Curable Ink
- Functions
- Photoinitiator
- Name
- 2,4,5,7-tetraiodo-3-hydroxy-6-fluorone
- Markets
- Adhesives & Sealants
- Paints & Coatings
- Advantages
High absorptivity, low concentrations are needed (0.01-0.15% by weight); Cationic cured epoxides are not susceptible to oxygen inhibition and exhibit a tack free surface upon cure; Capable of significant depth of cure > 1 inch; Cure through UV opaque or pigmented substrates (e.g. Kapton); Initiator bleaching (bright red to pale pink/no color) upon light interaction can act as cure indicator
- Appearance
- Red Powder
- Cure
- Radiation Cure
- Applications
Adhesives & Sealants — Other Adhesives & Sealants Applications; Paints & Coatings — Other Paints & Coatings Applications
- Coating Type
- Radiation Curable Coating
- Technology
- CASE Ingredients
- Labeling Claims
- Non-Toxic
- Ink and Toner Type
- Radiation Curable Ink
- Adhesive & Sealant Type
- Radiation Curable Adhesive
- Examples of Uses
SU-8 photoresist; Y. Lin, P.R. Hermann, and K.Darmawikarta, Appl. Phys. Lett. 86, 7, 071117 (2005); J.H. Moon, S.-M. Yang, D.J. Pine, and W.-S. Chang, Appl. Phys. Lett. 85, 18, 4184 (2004); D. Rodriguez Ponce, K Lozano, et al. J. Polym. Sci.: Part B: Polym. Phys. 48, 1, 47 (2010)
Technical data
Table 1 of 1
3 rows| Characteristic | Value | Unit | Method |
|---|---|---|---|
| Absorbance | max. 535 | nm | UV Visible spectroscopy |
| Melting Point | min. 270 | °C | Melting point Analysis |
| Molar Extinction Coefficient (535) | 91200 | nm | UV Visible spectroscopy |
