PIGMENTS | TITANIUM DIOXIDE


possible to rate packaging in a similar way. Chemours has begun marketing this Ti-Pure


Figure 3: Influence of TiO2 type on gloss retention in PVC – durable versus non-durable grades. The graph shows a clear differentiation in gloss retention depending on the TiO2 surface treatment Source, Chemours


recovering vanadium. “The benefit of this route is that within the same flow-sheet, hematite and titanium dioxide are separated and recovered as saleable by-products in addition to vanadium pentoxide,” says industry veteran Philippe Guille- maille, who is now TiO2


manager with TNG.


The service approach As it emerges from the shadow of DuPont, Chem- ours is putting more emphasis on providing services to go alongside its Ti-Pure products. The aim is to create a complete package of solutions that, for example, will enable users in the packag- ing industry to calculate exactly how much TiO2


is


required in a milk bottle to provide the desired level of protection from sunlight. Melis Arin, Application Development Consultant, Titanium Technologies, with Chemours Belgium, says that, just like sun creams are given a sunblock factor, it is


Protect concept for creation of light protective packaging for preserving milk freshness and nutrition. It says it offers light protective materials, access to proprietary measurement technology, tests to rapidly quantify the light protection performance of package designs, options to meet targeted performance specifications, and a licence to use the Ti-Pure Protect brand on packages to show that they are designed to preserve nutrients like Riboflavin, Vitamin A and Vitamin D. Targeting another key TiO2


market, Chemours


Technical Specialist Geert Sterkendries gave a presentation on durability improvements in exterior applications with advanced TiO2


at the first Profiles


conference to be held by Compounding World publisher AMI in Europe, in Cologne back in September. He discussed how TiO2


can help


reduce the degradation by weathering (photo- oxidation) in PVC that leads to yellowing, “photo- bluing” and loss of gloss (Figure 3) and mechanical properties. The TiO2


but also to absorb UV light. And because TiO2


serves not only to scatter visible light is


photocatalytic, untreated grades will actually promote UV degradation of the resin in the presence of moisture and oxygen. This is why grades such as Ti-Pure R-105 have no fewer than three surface treatments: silica to improve durability and resistance to discoloration; alumina to improve flow and prevent flocculation; and an organic treatment to improve wettability, dispersion, and handling. Working along similar lines meanwhile, in May


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