Bayer Chemicals has expanded its line of material protection products with the acquisition of two families of biocide chemistry.      Bayer acquired the EPA-registered active ingredient thiabendazole (TBZ) and dibromodicyanobutane (DBDCB), along with certain patent-protected formulations of these and other biocide chemistries from Ondeo Nalco Company. The acquisition, including the trade names Tektamer, Biochek and Metasol, expands and strengthens well-established offerings of Bayer’s materia...