KKR, the US private equity group, and CSFB Private Equity have teamed up with Rockwood Specialties Group, a US trade buyer, to acquire four Dynamit Nobel businesses for $2.7bn (€2.25bn).

The consortium bought the four chemical and advanced materials units from mg technologies, the German industrial group, in a deal financed by Credit Suisse First Boston, Goldman Sachs and UBS. The new owners plan to launch a new global chemicals group with a total turnover in excess of $2.5bn.