In recent years, other types of wood preservatives, including alkaline copper quat (ACQ), copper azole (CA-B and CBA-A), and copper dimethyldithiocarbamate
(CDDC) have been standardized for use in similar applications.
The vulcanization accelerators used in this study were ethylenethiourea (ETU), 2-mercaptobenzothiazole (MBT), N-cyclohexyl-2-benzothiazylsulfenamide (CBS), tetramethylthiuram monosulfide (TMTM) and zinc dimethyldithiocarbamate
Leaching characteristics and fixation of copper dimethyldithiocarbamate
Method for preserving wood using single reactor and active dimethyldithiocarbamate
agent produced in situ.
As illustrated in figure 13, sulfur rich complexes are formed by insertion of sulfur into the zinc dimethyldithiocarbamate
molecule, which in turn is an active sulfurating complex.
The process consists of a monoethanolamine treatment followed by sodium dimethyldithiocarbamate
treatment; Cu-N = copper naphthenate: naphthenic acid, copper salt 60 to 80 percent, mineral spirits 15 to 25 percent; PCP = pentachlorophenol: pentachlorophenol 90 to 94 percent, 2,3,4,6,-tetrachlorophenol 0 to 1.
The main accelerators used were N-cyclohexyl-2-benzothiazylsulfenamide (CBTS), tetramethylthiuram disulfide (TMTD), zinc dimethyldithiocarbamate
(ZDMDC) and dibenzothiazyl disulfide (MBTS).
2 pphr) of a lead dimethyldithiocarbamate
can be used as an accelerator.