FOCUS The first part of this Tuesday morning conference session concluded with a paper from Ms Kerstin Weissenbach on the use of silanes in the plastics industry. The functionality of mineral fillers depends mainly on particle shape, particle size distribution and surface chemistry. The surface chemistry accounts for the compatibility between the filler and the polymer. It influences processability (eg wettability) and macroscopic properties (eg scratch resistance). The role of silanes is to modify the surface chemistry so as to improve compatibility between the functional filler and the resin. The nature of the filler surface plays an important role in how effective the silane surface treatment will be. In theory, a monomolecular layer of silane on every filler particle is required for optimum adhesion and modification of the surface. Best results are achieved with fillers that have chemically active sites on the surface, preferably hydroxyl groups. Excellent silane/filler reactivity is shown by kaolin, alumina trihydrate (ATH), wollastonite, quartz, cristobalite, precipitated and fumed silica, and glass fibre. Good reactivity is shown by talc, mica, magnesium dihydrate, inorganic oxides and silicates. Only slight reactivity is shown by calcium carbonate and barium sulfate, while reactivity for carbon black is frankly rather poor. Ms Weissenbach pointed out that with ATH, the key problem was always the very high loadings required for flame retardation and these high loadings severely compromised melt processability and physical properties. Aminosilanes and the new aminosilane blends have been shown to perform as excellent coupling agents, resolving the problem by increasing filler/matrix adhesion and reducing the surface energy of the filler. Meanwhile, in Salon Gaudi, the other conference chamber, the mineral sands session was in full swing. Presentations from this session will be reviewed in a future issue of ‘Focus on Pigments.’ Reg Adams
The full set of papers from the conference IM-17 are available from: Metal Bulletin Conferences, Park House, Park Terrace, Worcester Park KT4 7HY, UK. Tel: +44 (0)20 7827 9977. Fax: +44 (0)20 8335 3994
MAY 2004
ON
PIGMENTS
MARKETS TiO2 consumption for plastics forecast to grow at 6-7% per annum Mr Kevin Leary (of DuPont) forecasts an expansion of TiO2 pigment consumption in the global plastics industry of the order of 6-7% per annum between now and 2008. Growth in North America will be between 2% and 3.5% per annum. Growth in Asia will probably exceed 10% per annum. Demand growth is likely to be highest in the polyolefins sector, followed by the polyvinyl chloride sector. Plastics News, 4 Mar 2004 (Website: http://www.plasticsnews.com)
Imerys wants further kaolin price rises as reimbursement for paying higher energy costs Kaolin consumption in North America has been more or less on a plateau for several years, though there was a short-lived upsurge in demand in 3Q 2003. Paper filling and coating applications account for up to 66% of total consumption, most of the balance being accounted for by the ceramics sector and sundry speciality applications. Indigenous kaolin producers have faced intense competition from importers, especially Brazilian kaolin suppliers. CVRD reported a worldwide increase in its kaolin sales – from 451,000 tonnes in 2002 to 731,000 tonnes in 2003 – with the US and Canada featuring as major destinations. There has been some industry rationalisation in Georgia and this has helped to stabilise the market. At the start of 2004, Imerys and Huber raised their kaolin prices and these rises have been more or less accepted. However, Imerys emphasises the latest price rises have not yet balanced increased costs from increased energy costs. Prices for paper grade calcined kaolin are steady at $250–280 /s.ton. The price for hydrous kaolin is $115–120 /s.ton. Chemical Market Reporter, 22 Mar 2004, (Website: http://www.chemicalmarketreporter.com) & BNAmericas Metals News, 25 Mar 2004, (Business News Americas Ltda, Website: http://www.Bnamericas.com)
European spending on carotenoids to pass $400 M mark by 2010 The European market for carotenoids was worth $348.5 M in 2003 and it is forecast to expand by 2.7% per annum to $419.6 M in 2010. Carotenoids are used by the (human) food and (animal) feeds industry, primarily as colorants. Their potential nutraceutical value has been largely ignored. Only in Germany have carotenoids been widely used for their functional properties in food supplements. Market expansion will be driven by an emphasis on personal health combined with the rising interest in preventative health measures by Europe’s aging population. Increasingly health-conscious consumers now actively seek fortified foods and functional foods. This is likely to trigger an increase in the demand for carotenoids by the food industry for their antioxidant and nutraceutical properties. The supplements and fortified foods segment is poised to become the fastest-growing segment of the carotenoids market. It is likely to boost its share of overall market revenues from 18.2% in 2003 to 27% in 2010, making it the second-largest revenue generator behind the animal feed segment. Growth at 2.7% per annum means an increase in value terms of $71.1 M, of which beta-carotene will contribute $23 M, lycopene $26 M and lutein $21 M. The small but fast-growing use of natural astaxanthin in supplements with compound annual revenue growth forecast at 26% between 2000 and 2010, offers hope for this mature segment. High entry barriers have stabilised the number of participants in the global market for carotenoids at around 28-32 companies. The two leading companies – Roche (soon to be DSM) and BASF – control 75% of the total carotenoids market. These two companies dominate the three largest segments of the industry, namely: beta-carotene, astaxanthin and canthaxanthin. Smaller market participants are active in high growth potential segments – lutein and lycopene. Multiclient Report on Carotenoids in Europe, published by: Frost & Sullivan, 1040, East Brokaw Road, San Jose, CA 95131-2309, USA, Website: http://www.frost.com (Apr 2004)
3