Spectra Group Limited H-Nu 640MP
- CASE Ingredients Features
- Fast CureFaster Cure TimeNon-Yellowing GradeYellowing ResistanceYellowing Stability
Spectra Group Limited H-Nu 640MP can cure a wide range of acrylate resins via free-radical mechanism. It is a commercial photoinitiator with a broad absorbance range of 570 nm to 670 nm (λmax = 649nm in DMSO).
Properties
- Physical Form
- Powder
- Solid
Identification
- CASE Ingredients Functions
- Photoinitiator
Product families
- Catalysts & Initiators
Other characteristics
- End Uses
Radiation Curable Adhesive, Radiation Curable Coating, Radiation Curable Ink
- Functions
- Photoinitiator
- Markets
- Adhesives & Sealants
- Paints & Coatings
- Advantages
Good solubility in a variety of monomers; Capable of curing a wide range of acrylates via free-radical mechanism; Cure with red source (red handheld lasers and laser diodes); Cure through colored substrates (e.g. a red taillight assembly); Initiator bleaching (blue to pale/no color) upon light interaction can act as cure indicator (Borate V enhances cure and bleaching)
- Appearance
- Light Blue 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
- Ink and Toner Type
- Radiation Curable Ink
- Adhesive & Sealant Type
- Radiation Curable Adhesive
- Application Recommendations
The recommended starting level of H-Nu 640MP ranges from 0.25 to 1 wt.% in relation to the total amount of resin in a formulation.; Borate V co-initiator at a 1:1 weight ratio is not required but will increase the cure speed and overall bleaching of the initiator in many formulations, so it is highly recommended.; The H-Nu 640 is quite soluble in most acrylate resins, but it is recommended to predissolve photoinitiator and the Borate V (poor solubility in acrylates) in DMAA (N,N-Dimethylacrylamide, 2-3%) for ease of incorporation into your formulation.
Technical data
Table 1 of 1
1 row| Characteristic | Value | Unit | Method |
|---|---|---|---|
| Absorbance | max. 650 | nm | UV Visible spectroscopy |
