Methods and Compositions for Use in Glued-Wood Products

Abstract

The present invention relates to a composition for increasing the retention of a biocide in a glueline-treated glued-wood product, a method for increasing the retention of a biocide in a glueline-treated glued-wood product, a glueline-treated glued-wood product, a glue for producing a glueline-treated glued-wood product, and the use of a composition for increasing the retention of a biocide in a glued-wood product.

What is claimed: 
     
         1 . A composition for increasing the retention of a biocide in a glueline-treated glued-wood product that has been hot-pressed and/or block-stacked during manufacture comprising particles of at least one biocide, wherein said particles have a volume mean diameter D [4,3] of at least about 20 μm. 
     
     
         2 . The composition according to  claim 1 , wherein said at least one biocide is selected from an insecticide, a fungicide, or a combination thereof. 
     
     
         3 . The composition according to  claim 1 , wherein said particles have a volume mean diameter D [4,3] of at least about 25 μm. 
     
     
         4 . The composition according to  claim 1 , wherein said particles have a volume weighted percentile Dv90 of about 400 μm or less. 
     
     
         5 . The composition according to  claim 1  comprising about 1 to 99% of biocide particles by weight, based on the total weight of the composition. 
     
     
         6 . The composition according to  claim 1 , wherein the glueline-treated glued-wood product is selected from engineered wood products, glued-wood veneers, reconstituted wood-based products including glued-wood flakes, chips, strands, particles, fibres, flour, dusts and nanofibrils, flakeboard, chipboard, strandboard, OSB, parallel strand lumber, particleboard, MDF, high density fibreboard, hardboard, or a combination thereof. 
     
     
         7 . The composition according to  claim 1 , wherein the composition is suitable for glue addition and wherein the composition is formulated as a suspension in water and/or one or more water-miscible non-solvent liquids, selected from glycerol, ethylene glycol, propylene glycol, sugar alcohols, or a combination thereof. 
     
     
         8 . A method for increasing the retention of a biocide in a glueline-treated glued-wood product that has been hot-pressed and/or block-stacked during manufacture comprising applying a composition according to  claim 1  to the glueline during the production of said product. 
     
     
         9 . The method according to  claim 8 , wherein the glued-wood product is selected from engineered wood products, glued-wood veneers, plywood, LVL, reconstituted wood-based products, glued-wood flakes, chips, strands, particles, fibres, flour, dusts and nanofibrils, flakeboard, chipboard, strandboard, OSB, parallel strand lumber, particleboard, MDF, high density fibreboard, hardboard, or a combination thereof. 
     
     
         10 . The method according to  claim 8 , wherein glue in the glued-wood product is selected from phenolic resins including novolac-type and resole-type phenol-formaldehyde (PF) resins, resorcinol-formaldehyde resins and phenol-resorcinol-formaldehyde resins, amino resins including hydroxymethyl or alkoxymethyl derivatives of urea, chiefly urea-formaldehyde, melamine, benzoguanamine, glycoluril, urea-formaldehyde, melamine-formaldehyde, melamine-urea formaldehyde resins, isocyanate resins including isocyanate resins based on (partially) polymerised diisocyanates, mainly polymeric diphenylmethane diisocyanate (pMDI), thermoset epoxy and polyurethane resins, PVAs, and adhesives based on biomaterials including proteins, starches, lignocellulosic extractives including lignins, or a combination thereof. 
     
     
         11 . The method according to  claim 8 , wherein applying a composition according to  claim 1  to the glueline during the production of said product comprises blending said composition directly into the glue at any time from glue production to use during manufacture of the glued-wood product. 
     
     
         12 . The method according to  claim 8 , wherein applying a composition according to  claim 1  to the glueline during the production of said product comprises applying said composition indirectly to the glue by applying said composition to the wood component prior to, at the same time as, or after introduction of the glue during manufacture of the glued-wood product. 
     
     
         13 . A glueline-treated glued-wood product comprising the composition according to  claim 1 . 
     
     
         14 . A glueline-treated glued-wood product manufactured according to the method of  claim 8 . 
     
     
         15 . A glue for producing a glueline-treated glued-wood product comprising the composition according to  claim 1 . 
     
     
         16 . The glue according to  claim 15 , wherein the glue is selected from phenolic resins including novolac-type and resole-type phenol-formaldehyde (PF) resins, resorcinol-formaldehyde resins and phenol-resorcinol-formaldehyde resins, amino resins including hydroxymethyl or alkoxymethyl derivatives of urea, chiefly urea-formaldehyde, melamine, benzoguanamine, glycoluril, urea-formaldehyde, melamine-formaldehyde, melamine-urea formaldehyde resins, isocyanate resins including isocyanate resins based on (partially) polymerised diisocyanates, mainly polymeric diphenylmethane diisocyanate (pMDI), thermoset epoxy and polyurethane resins, PVAs, and adhesives based on biomaterials including proteins, starches, lignocellulosic extractives including lignins, or a combination thereof. 
     
     
         17 . A method for increasing the retention of a biocide in a glued-wood product comprising the composition according to  claim 1  and a glue or native resin, wherein the glued-wood product has been hot-pressed or hot-pressed and block-stacked during manufacture, and wherein the composition is applied to the glue or the native resin. 
     
     
         18 . The composition according to  claim 1 , wherein said particles have a volume weighted percentile Dv90 of about 300 μm or less. 
     
     
         19 . The composition according to  claim 1  comprising about 2 to 97% of biocide particles by weight, based on the total weight of the composition. 
     
     
         20 . The composition according to  claim 1  comprising about 3 to 95% of biocide particles by weight, based on the total weight of the composition.