The Mayfield Heights-based coatings producer on Thursday, April 21, said its acquisition by mineral and chemicals company Prince International Corp. has closed. Prince paid $22 per share in the $2.1 billion, all-cash deal. In turn, Prince and Ashtabula-based Chromaflo Technologies — both part of private equity firm American Securities — along with Ferro are being combined into a business called Vibrantz Technologies, with more than 5,400 employees worldwide.