PIGMENTS | TITANIUM DIOXIDE
Venator launched Altiris W400, a near-infrared reflecting TiO2
pigment that the company says can
improve the thermal stability and durability of white, bright and light coloured plastics used in exterior applications such as window and door profiles, sidings, decking, soffits and fascias. It says Altiris W400, the most recent introduction to a family of enhanced solar reflective products, is unique in terms of its combination of large crystal size, narrow particle distribution, high crystalline purity and dense silica coating. “With a primary crystal size of 400nm, the
product consists of a macro TiO2 core, dense silica TiO2
makers challenge EU cancer concerns
The decision by the Risk Assessment Committee (RAC) of the European Chemicals Agency (ECHA) to classify TiO2
as a suspect-
ed carcinogen (Category 2 (1A)) has not been received well by the industry, which has mounted a stiff defence through its representa- tive bodies (read more on the ECHA website HERE) The Titanium Dioxide Manufacturers Association (TDMA),
https://echa.europa.eu/-/titanium-dioxide-proposed-to-be-classified-as-suspected-of-causing-cancer-when-inhaled
part of the European chemicals industry association Cefic, says that a vast body of scientific evidence based on over 50 years of epidemiological data on more than 24,000 workers does not support a classification of TiO2
for humans; and that there is “no
link between cancer in humans and exposure to titanium dioxide.” TDMA said the carcinogenic classification “would do nothing to
increase the level of protection of human health and the environ- ment, which is the whole point of the labelling and classification system.” The association also says that in the studies considered by the
RAC, “the effects observed were specific to the rat and have not been seen in scientific studies on any other species, including humans, as they relate to a mode of action that only occurs in rats. These effects in rats are only observed via inhalation at an expo- sure level many times higher than those encountered by workers on a daily basis. Most importantly, these effects are seen with all poorly soluble dusts and are not specific to TiO2
other poorly soluble particulate substances will become liable for classification too.” TDMA Chairman Robert Bird said: “We are confident that
European regulators will confirm the continued safe use of TiO2 in
all applications. TDMA and its members will therefore continue to explore regulatory pathways that can ensure the continued use of titanium dioxide across all industries and applications, and look forward to a constructive dialogue with the European Commission.” �
www.tdma.info �
www.echa.europa.eu �
www.cefic.org
32 COMPOUNDING WORLD | October 2017
shell and alumina outer coating with an organic treatment,” the company says. “This larger crystal size shifts the reflectance emphasis across the solar spectrum. This ensures that a greater proportion of near infrared light is reflected when compared to a typical grade of titanium dioxide produced for pigmentary use – while also helping to maintain substantial hiding power and tinting strength.” The spectra of Altiris W400 pigment can boost the solar reflectance of white and light coloured plastics by as much as 25% compared to ordinary TiO2, the company says. “With greater heat resisting properties, plastics heat more slowly, reach lower maximum temperatures, show a smaller temperature difference through the substrate, and consequently experience lower temperature drops in the evening,” it claims. “Ultimately, that means less expansion and contrac- tion, less product warp, and exterior plastic products that will last longer, particularly in hot, sunny climates.” Russell Evans, Business Development Director at
Venator, says: “Until recently, [solar reflective] technology was an optional item in the plastic formulation toolbox. That’s now starting to change. As decision makers seek to maximise reductions in infrared, heat-related plastic warping, we are seeing a real need for a fully optimized reflective technology.”
. This means many
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.clariant.com �
www.venatorcorp.com �
www.chemours.com �
www.fp-pigments.com �
www.cornelius.co.uk �
www.vbtechno.ch �
www.innovativetio2.com (RD Titan Group) �
www.lomonbillions.com �
www.tronox.com �
www.cristal.com �
www.tngltd.com.au
www.compoundingworld.com
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