Photoinitators
A photoinitiator is a compound that undergoes a photoreaction on absorption of light, producing reactive species. These are capable of initiating or catalyzing chemical reactions that result in significant changes in the solubility and physical properties of suitable formulations.
For over 30 years, Hampford Research Inc. has manufactured free radical photoinitiators based on the hexaaryl-bisimidazolyl (HABI) molecule. Through careful modification of the substituents on the aryl groups, HRI has been able to significantly improve the performance at 365, 395 & 405 nm, the wavelength most commonly emitted by LED lights. These innovative new compounds will still produce stable lophyl radicals and offer resistance to oxygen inhibition that HABI’s are known for.
All HABI photoinitiators operate via a Norrish II type reaction mechanism, meaning they must be combined with a suitable co-initiator in order attain complete photo-polymerization. Hampford Research experts can help you choose the ideal combination for your application.
The high molecular weight as well as the low polarity of the HABI molecule makes it ideal for applications where low migration characteristics are paramount.
HABI, for LED applications is sold exclusively under the LEDCUR tradename.
For more information, or to request samples please CLICK HERE.
| Product Name | Function | CAS Number | HRI Prod. # |
|---|---|---|---|
| Camphorquinone (CQ) | Photoinitiator type II, sensitizer | 10373-78-1 | FP5060 |
| Benzil Dimethyl Ketal (BDK) | Photoinitiator | 24650-42-8 | FP5067 |
| Bis(trichlorofluoro) HABI | Free radical photoinitiator, low migration | 2991098-03-2 | FP5414 |
| Dibromochalcone | Photoinitiator, sensitizer, sensitizing dye | 611-91-6 | FP5080 |
| o-Cl-HABI (BCIM) | Free radical photoinitiator with outstanding heat stability, low migration | 7189-82-4 | FP5380 |
| o-Ethoxy HABI | Free radical photoinitiator, low migration | 29864-18-4 | FP5385 |
| 9-Phenylacridine | Photoinitiator type II, sensitizer, sensitizing dye | 602-56-2 | FP5400 |
| TCDM-HABI | Free radical photoinitiator, low migration, optimized for use with 365 and 385 nm LED lamps | 100486-97-3 | FP5450 |
| TMCH (4-MTD) | Photoinitiator type I, free radical generator | 3274-12-2 | FP5510 |
Photoacid Generators
Photoacids are molecules which become more acidic upon absorption of light. This is due either to the formation of strong acids upon photodissociation, or to the dissociation of protons upon photoassociation (e.g. ring-closing). There are two main types of molecules that release protons upon illumination: photoacid generators (PAGs) and photoacids (PAHs). PAGs undergo proton photodissociation irreversibly, while PAHs are molecules that undergo proton photodissociation and thermal reassociation. In this case the excited state is strongly acidic, but reversible.
Hampford Research Inc. is a global supplier of iodonium based photoacid generators under the LEDCUR tradename. These highly engineered compounds offer unmatched photo speed, solubility, and high temperature stability for both LED as well as broad spectra applications.
LEDCUR iodoniums are available in both technical as well as low trace metal (LTM) suitable for your most critical applications.
For more information, or to request samples please Click Here.
| Product Name | Function | CAS Number | HRI Prod. # |
|---|---|---|---|
| Bis(4-cumyl)iodonium Tetraphenylborate | Photoacid generator | 1158840-74-4 | FP5028 |
| Bis(4-t-butylphenyl)iodonium Tetraphenylborate | Photoacid generator | 131725-16-1 | FP5041 |
| Bis(4-t-butylphenyl)iodonium Chloride | Photoacid generator | 5421-53-4 | FP5213 |
| OPPI | Asymmetric iodonium photoacid generator | 121239-75-6 | FP5386 |
| BisDDI SbF6 70% | Photoacid generator | 71786-70-4 | FP5374 |
| HPPI 5225 | Asymmetric iodonium photoacid generator | 139301-16-9 | FP5225 |
| 2,4,6-Trimethylpyridinium Tosylate | High performance specialty photoacid generator | 59229-09-3 | FP5552 |