The co-formulation of a wood preservative (‘treated’) with an inorganic (alkali metal silicates) based flame retardant which undergoes chemical impregnation. Once the ‘treated flame retardant” working solution has fully penetrated (sapwood) into the wood, it then undergoes a heat (fixation) process using various heating schedules to achieve chemical fixation. The treated flame retardant Modified Wood [tfrMW] products are then tested for their enhanced fire performance properties. When heated, wood undergoes thermal degradation and combustion producing gases, vapours, tars & chars. Using the ‘cone calorimeter’ test method, the [tfrMW] products showed a significant reduction in the following parameters: heat release rate (HRR), mass loss rate (MLR) & smoke generated (SEA) values compared to untreated radiata pine.

The present disclosure describes a treated cellulosic material comprising a cellulosic material having a porous structure defining a plurality of pores, at least a portion of the pores containing a treating agent comprising a polymer comprising an olefin-carboxylic acid copolymer; and a modifying agent comprising an epoxy.

The present disclosure describes a treated cellulosic material comprising a cellulosic material having a porous structure defining a plurality of pores, at least a portion of the pores containing a treating agent comprising a polymer comprising an olefin-carboxylic acid copolymer; and a modifying agent comprising an epoxy.

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.

According to the present invention there is provided the use of one or more low aromatic or substantially low aromatic solvents as a carrier, for efficacious use within a preservative formulation for treating wood or other cellulosic species. The invention also provides for a wood preservative formulation comprising such a carrier. In an embodiment, the carrier is selected from the commercially-available range of Exxsol® D and Isopar® fluids.

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.

An aqueous dispersion of octylisothiazolinone (“OIT”) has been found to be useful for delivering OIT to wood for protecting the wood from fungal discoloration. The OIT dispersion can be applied to the wood to develop a protective barrier of relatively preservative at or near the exterior surface of the wood piece.

An aqueous dispersion of octylisothiazolinone (“OIT”) has been found to be useful for delivering OIT to wood for protecting the wood from fungal discoloration. The OIT dispersion can be applied to the wood to develop a protective barrier of relatively preservative at or near the exterior surface of the wood piece.