PBK526 Eco Composite Functional Black is a composite inorganic black pigment developed by Kela Materials. It is primarily based on mixed oxides of copper (Cu), manganese (Mn), and iron (Fe), designed to deliver a purer, more stable black tone than many organic blacks or conventional carbon-based blacks in demanding processing environments.
This material is positioned for engineering use cases where thermal stability, process robustness, and color retention matter. PBK526 is not presented as a finished formulation; performance depends on binder/resin selection, dispersion method, film thickness, and processing temperature profile.
Typical value proposition: stable black appearance under heat and aging, with system-level predictability when carbon black introduces conductivity drift, blooming, or tone instability.
| Product Model | Eco compound | |
|---|---|---|
| Color | Black (blue-toned black) | |
| Pigment Index Number | PBk26 | |
| Main ingredients | Cu/Fe/Mn/O | |
| Crystal phase structure | Spinel type | |
| Density g/cm3 | 4.0～4.4g/cm3 | |
| pH value | 7.2～8.0 | |
| Oil absorption (g/100g) | 28～32 | |
| Volatile matter percentage at 105℃ | <0.5 | |
| Water-soluble matter % | <0.5 | |
| Fineness μm | 0.8～1.5μm | |
| Heat resistance ℃ | <800℃ | |
| Lightfastness | 8 | |
| Acid resistance | 5 | |
| Alkali resistance | 5 |
| Item | Guidance |
|---|---|
| Chemistry | Cu–Mn–Fe oxide composite (inorganic) |
| Role | Functional black pigment for heat-demanding systems |
| Performance depends on | Resin/binder choice, dispersion, loading, film thickness, thermal profile |
| Recommended validation | Heat-aging color drift, gloss/DOE, dispersion stability, migration screening |
Is PBK526 a carbon black replacement?
PBK526 is a non-carbon inorganic black option. Whether it can replace carbon black depends on target shade, loading limits, dispersion method, conductivity requirements, and cost constraints.
Will PBK526 change electrical properties?
As a non-carbon black, it is generally selected when avoiding conductivity drift is important. Actual electrical behavior is formulation-dependent and should be verified in the end system.
Does PBK526 work in high-temperature polymers?
It is positioned for heat-demanding processing environments. Suitability must be confirmed against the polymer’s processing temperature, residence time, and dispersion quality.
What should I test first?
Start with dispersion quality (fineness / stability), then heat-aging color drift, and finally migration/blooming screens in the intended binder system.