WESEL, Germany - The specialty chemicals Group ALTANA has acquired the high-performance additives business of the Frankfurt-based DyStar group. The acquired business, with annual of sales of about EUR 7.5 million, will be integrated into the BYK Additives & Instruments division. The acquisition includes the technologies for the production of additives and for the processing of plastics compounds, as well as existing customer contacts. The production of the additives will be integrated into BYK´s main factory in Wesel, Germany.