Wood preservative compositions
AssigneeBorax Holdings Limited
InventorsDenis Boocock, Barbara M. Kimber
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Abstract
Compositions for preventing or inhibiting the infection of wood raw materials by fungi causing sapstain, superficial mold and decay comprising a mixture of a dithiocarbamate, an alkali metal borate, and a selected antioxidant stabilizing agent. The mixtures exhibit a synergistic fungicidal activity and have the advantage over known anti-stain wood-preservative compounds that they are stable, relatively non-toxic and water-soluble. The compositions may be formulated as a dry formulation, as a solution or as a gel and may also include an alkaline salt or a gelling agent.
Claims21
A wood preservative composition for controlling sapstain and superficial mold comprising as active ingredient a mixture of an alkali metal borate and a dithiocarbamate of the formula:
- ##STR2## wherein R.sub.1 and R.sub.2 are each selected from hydrogen and alkyl containing 1 to 5 carbon atoms and M represents an alkali metal, an ammonium group or a lower alkyl substituted ammonium group, in which said alkali metal borate and dithiocarbamate are present in a ratio of 3:1 to 1:3 parts by weight, the alkali metal borate being expressed as anhydrous borax, and about 1 to 5 percent, based on said dithiocarbamate, of a stabilizer selected from sodium sulfite, potassium metabisulfite, and sodium lower alkyl xanthates.
A method of preventing or inhibiting the infection of wood raw material by fungi which cause sapstain, superficial mold and decay which comprises contacting the wood raw material with a wood-preservative composition comprising as active ingredient a mixture of alkali metal borate and dithiocarbamate of the formula:
- ##STR3## wherein R.sub.1 and R.sub.2 are each selected from hydrogen and alkyl containing 1 to 5 carbon atoms and M represents an alkali metal, an ammonium group or a lower alkyl substituted ammonium group, in which said alkali metal borate and dithiocarbamate are present in a ratio of 3:1 to 1:3 parts by weight, the alkali metal borate being expressed as anhydrous borax, and about 1 to 5 percent, based on said dithiocarbamate, of a stabilizer selected from sodium sulfite, potassium metabisulfite, and sodium lower alkyl xanthates.
Dependencies are inferred from the claim text.