Rockwood to sell rheology additives business to Altana for $635 million

22:54 PM | August 12, 2013 | —Natasha Alperowicz and Vincent Valk

Altana (Wesel, Germany) says it has agreed to acquire the rheology additives, or clay-based additives, business of Rockwood Holdings, for $635 million. The clay-based additives business generated $191...