Products Description
BCIM, a HABI photoinitiator, features excellent thermal stability and high photosensitivity with high imaging resolution, low gelation risk during formula storage, ideal for high-precision photocuring imaging systems such as PCB photoresist and CTP plates.
Products Specification
| Product name | BCIM/2,2'-Bis(2-chlorophenyl)-4,4',5,5'-tetraphenyl-1,2'-biimidazole |
| CAS NO | 7189-82-4 |
| ITEM NO | M784 |
| Appearance | Light yellow powder |
| Purity | 99% |
| Melting point | 194°C |
| Package | 100g/1kg/25kg etc. |
| Delivery | 2-3days |
| Storage | room temperature |
| MSDS/COA/TDS | Connect us |
Products Application
1.PCB Electronic Photoresist Industry: Dry film photoresist for circuit boards, to fabricate precise circuit patterns by exposure imaging.
2.Printing Plate Industry: CTP and PS lithographic printing plates, used as core photoinitiator in photosensitive layer.
3.UV Ink Industry: High-resolution offset and screen UV inks for higher photosensitivity.
4.Electronic UV Adhesive Industry: UV curable adhesives for electronic components, compatible with high-temperature resistant formulations.
5.UV Coating Industry: Protective UV coatings for electronics, stable storage and low gelation risk.
6.Photochemistry R&D Field: Development of visible light curing systems, used with sensitizers.
FAQ
Q: What role does BCIM biimidazole photoinitiator play in PCB dry film photoresist?
A: It is HABI hexaarylbiimidazole photoinitiator. It decomposes to generate free radicals under UV exposure and triggers photopolymerization of resin to form high-precision circuit patterns.
Q: What is the core advantage of BCIM compared with ordinary Type I photoinitiators?
A: It has excellent thermal stability. The formulated photoresist is not easy to pre-gel during storage at room temperature, meanwhile it has high photosensitivity and good imaging resolution.
Q: What should be noted for BCIM storage?
A: Store sealed away from light in cool and dry place. Avoid strong light, which will cause premature decomposition and reduce photosensitivity.
Q: How about the chemical resistance of photoresist formulated with BCIM after curing?
A: The cured crosslinked structure is stable, with good resistance to acid, alkali and etching solution, meeting the requirements of PCB etching process.
Q: How is the heat resistance of BCIM compared with other HABI biimidazole products in formulation?
A: The ortho-chloro substituted structure of BCIM delivers better thermal stability. It is not easy to decompose in advance during high-temperature processing or long-term storage, suitable for photosensitive systems like PCB dry film.
Q: Will BCIM precipitate and crystallize in photoresist system?
A: No precipitation under reasonable proportion. Its solubility depends on resin system. Low-temperature storage stability test is recommended during formula development.
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