Disclosed is the integration of the production of acetic anhydride from ketene, and the acetylation of wood using acetylation fluid comprising acetic acid and acetic anhydride. The invention involves directly using raw acetic anhydride as obtained in the production thereof from ketene, as a wood acetylation fluid.

Here are described boroxine-containing compounds and their compositions for the treatment of wood. For instance, the treatment of wood includes its protection against moisture and/or degradation caused by insects or microbes.

The present invention relates to a process for preparing a modified wood product wherein the wood is impregnated with water-based wood oils. In one embodiment, the wood is thermally modified prior to the impregnation. The present invention also relates to a modified wood product produced using said process.

The present invention relates to a process for preparing a modified wood product wherein the wood is impregnated with water-based wood oils. In one embodiment, the wood is thermally modified prior to the impregnation. The present invention also relates to a modified wood product produced using said process.

The present application relates to wood treatment. More specifically, the present application relates to wood treatment compositions having antimicrobial properties, methods using the same and wood products treated therewith. The present application includes a wood treatment composition comprising: an antimicrobial additive comprising at least one tannin; and a water-based solvent. The present application also includes a method for treating a wood product to stop or prevent microbial growth applying a wood treatment composition on the wood product, and optionally applying a wax; wherein applying the wood treatment composition comprises heating at least one surface of the wood product and impregnating the composition.

A synergistic aqueous wood preservative composition comprising a copper compound and penflufen. The copper compounds of the compositions of the invention may be soluble, partially solubilized or micronized particles. The penflufen of the compositions of the invention may be solubilized, emulsified or particulate. The wood preservative compositions of the present invention are surprisingly provided as stable dispersions and confer surprising and unexpected resistance to treated wood and wood products.

A synergistic aqueous wood preservative composition comprising a copper compound and penflufen. The copper compounds of the compositions of the invention may be soluble, partially solubilized or micronized particles. The penflufen of the compositions of the invention may be solubilized, emulsified or particulate. The wood preservative compositions of the present invention are surprisingly provided as stable dispersions and confer surprising and unexpected resistance to treated wood and wood products.

To improve the reliability of fire resistance with regard to wood materials containing a fireproofing treatment agent such as a semi-incombustible wood material while also improving both the ease of procuring raw materials and mass productivity, a panel board includes front/back veneers constituting the front and back thereof and a core veneer layer between the front/back veneers. The veneer fiber direction of the front/back veneers is substantially parallel to the lengthwise direction of the panel board. The core veneer layer is a layer obtained by stacking a plurality of sheets of core veneer in the thickness direction. The veneer fiber directions of all of the sheets of the core veneer are substantially orthogonal to the lengthwise direction of panel board. The front/back veneers has a thickness of 1.5-4.0 mm, and the thickness of the core veneer layer 31 is equal to or greater than the total thickness of the front/back veneer 21. Lathe checks and cracks are exposed on the board grain surfaces of all the front/back veneer 21, and an aqueous solution of a fireproofing agent is infiltrated therefrom.

Methods for treating cellulosic materials comprising introducing a liquid treating composition into the cellulosic material, the treating composition comprising a solution prepared from at least: (i) one or more of a copper amine complex or copper ammine complex, such as copper tetraamine carbonate, (ii) one or more of ammonia or a water-soluble amine and (iii) water; and exposing the cellulosic material provided thereby to carbon dioxide and/or carbonic acid to provide treated cellulosic material, and treated cellulosic materials prepared thereby.

Methods for treating cellulosic materials comprising introducing a liquid treating composition into the cellulosic material, the treating composition comprising a solution prepared from at least: (i) one or more of a copper amine complex or copper ammine complex, such as copper tetraamine carbonate, (ii) one or more of ammonia or a water-soluble amine and (iii) water; and exposing the cellulosic material provided thereby to carbon dioxide and/or carbonic acid to provide treated cellulosic material, and treated cellulosic materials prepared thereby.