Displays manufacturers need to balance the tradeoff between light shielding and electrical percolation threshold in black pigment. To this end, they search for unique particles to add anti-reflection effect on display materials.
We have offered pigment for black matrix applications for LCD displays for decades. We provide highly resistive carbon black that offers physical light shielding properties, and which assists in the electrical separation of distinct colored sub-pixels in color filters in a black matrix.
Recently, we have expanded our display-grade product portfolio with the launch of an aqueous anionic dispersion of resistive carbon black. This new product enables the formation of a thin film through standard aqueous techniques, which is different from existing display product grades that are dry black powders typically used in organic solvents.
Furthermore, we are developing new products to meet the needs of the rapidly evolving display industry. Our new products enable display manufacturers to achieve higher thermal stability, lower dielectric constant values, and thicker pixel membrane separation, such as through the use of black bump materials.
Our aqueous carbon black dispersion enables display manufacturers to apply a unique black pigment to various of display components and achieve stronger light shielding performance and electrical resistivity relative to our other carbon black products. Our aqueous black dispersion can be used to make films for light-directing materials and electrically resistive films, light control films, optoelectronic applications, and other applications where black color and high electrical resistivity are desired. Our carbon black particles are designed to have a low structure (nearly spherical particle shape), enabling the dispersion to maintain relatively low viscosity.
The dispersion of carbon black is electrostatically stabilized. It does not contain small molecule or polymer dispersants.
Surface functional groups that are covalently bonded to carbon black surface are ionized in water and generate negative surface charge. Sodium counter ions are present in the aqueous phase.
To form thin film via standard techniques such as immersion, spin coating, spray coating, electromagnetic deposition, layer-by-layer deposition, lithography, etc.
A low structure allows for high carbon black loading in a polymer film before reaching a percolation point. At the same time, the surface treatment creates an additional dielectric barrier that helps to further increase resistivity. The particles in TPK5315 aqueous dispersion carry a negative charge that can engage in ionic reactions with a positively charged surface/polymer.
The carbon black in TPK5315 aqueous dispersion can interact with polymer colloids. TPK5315 aqueous dispersion can be used in the coating's formulations, for example in the layer-by-layer coating deposition processes.
We have unique dispersion capabilities to deliver performance solutions.