Abstract:
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 a modified cellulose polymer; and a modifying agent comprising a hydrophobic amine, a metal ion, or a quat. The present disclosure further describes a method for preparing a treated cellulosic material comprising (a) providing a cellulosic material; (b) a first treatment protocol comprising impregnating the cellulosic material with a dispersion comprising a polymer, the polymer comprising a modified cellulose polymer; and (c) a second treatment protocol comprising impregnating the cellulosic material with a modifying agent, the modifying agent comprising a hydrophobic amine, a metal ion, or a quat.
Abstract:
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 a poly(meth)acrylate polymer. The present further describes a method for preparing a treated cellulosic material comprising (a) providing a cellulosic material; and (b) a first treatment protocol comprising impregnating the cellulosic material with an aqueous dispersion comprising a polymer, the polymer comprising a poly(meth)acrylate polymer.
Abstract:
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.
Abstract:
A process is provided for treating wood products including lumber, plywood and other engineered wood products comprising the steps of contacting a composition comprising a polypropylene glycol, a high molecular weight polyethylene glycol, a polyether polyol having low solubility in water, or a polytetrahydrofuran, or hydrophobic polyether polyol, with the wood product. The invention also provides wood products comprising a polypropylene glycol, a high molecular weight polyethylene glycol, a polyether polyol having low solubility in water, or a polytetrahydrofuran, or hydrophobic polyether polyol, that have greater dimensional stability compared to an untreated wood product.
Abstract:
A method of preserving wood is provided. The method comprises the step of contacting the wood with an aqueous composition comprising: (a) a wax having melting point higher than 75C and an average particle size no greater than 1 micron, (b) greater than 0.08% by weight, based on the weight of said aqueous composition, a nonionic surfactant having the formula wherein said R is an aliphatic group having 10 to 16 carbon atoms; wherein the average value of x is 4.5 to 5.5, and (c) one or more organic wood preservative.
Abstract:
The present invention relates to the use of an aqueous preparation for the coating of wood surfaces, characterized in that the aqueous preparation comprises: a hydroxyl-functional polyurethane- polyacrylate dispersion, apolyurethane dispersion, an at least partially hydrophilicized polyisocyanate and ≥ 0 weight-% to ≤ 10 weight-% of a matting agent, wherein the combined hydroxyl content of the hydroxyl-functional polyacrylate dispersion and the polyurethane dispersion is ≥ 1% to ≤ 12%.The invention further relates to a method of producing a coated wood surface, comprising the step of coating a wood surface with such an aqueous preparation and to a coated wood surface comprising an aqueous preparation whose use has been recited in the context of the use according to the invention.
Abstract:
Beschrieben wird ein Holzkörper mit einem Gehalt an Kautschuk, eingebracht durch Imprägnierung, Beaufschlagung oder Tränkung mit einem Kautschuk-Latex und anschließendem Trocknen. Es besteht auch die Möglichkeit, den in den Holzkörper eingebrachten Kautusch zu vulkanisieren. Ferner wird die vorteilhafte Verwendung dieses Holzkörpers in Gebäuden, Einrichtungen und Ausstattungen von Wohnungen sowie in Fahrzeugen auf dem Lande und im Wasser sowie ein Verfahren zu dessen Herstellung beschrieben. Dieser Holzkörper zeichnet sich durch einen besonders hohen Grad an Verrottungsresistenz aus. Zudem zeigt er neben wetteren vorteilhaften Eigenschaften eine wünschenswerte Elastizität.
Abstract:
A method of curing impregnated wood, comprising the steps of impregnating a wood sample with a polymerizable liquid, subjecting the wood sample to at least one heating iteration, wherein the wood is heated to between 70 to 140 degrees C by MW radiation such that the formation of polymers takes place in the wood cells.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zur Reduktion der Formaldehydemission von Holzwerkstoffen mittels Aufbringen stickstoffhaltiger Verbindungen, das dadurch gekennzeichnet ist, dass (i) auf den Holzwerkstoff eine Mischung aufgebracht wird, die mindestens ein Polyamin und gegebenenfalls bis zu 20 Gew.-%, bezogen auf die Mischung, Harnstoff enthält; (ii) auf oder in den Späne- oder Faserkuchen Polyamin aufgebracht wird; (iii) auf das zur Oberflächenveredlung verwendete Beschichtungssubstrat Polyamin aufgebracht wird und/oder (iv) auf die offenen Stellen Polyamin aufgebracht wird; wobei die Polyamine ein Molekulargewicht von mindestens 500 g/mol und mindestens 6 primäre oder sekundäre Aminogruppen aufweisen.
Abstract:
Method for impregnating lignocellulosic material with effect agents, comprises impregnating the lignocellulosic material with a fluid formation, which contains at least one effect agent in a dissolved or dispersed form; impregnating the material with a hardenable aqueous composition, which contains at least one cross-linkable compound; and treating the material obtained at an elevated temperature. Method for impregnating lignocellulosic material with effect agents, comprises impregnating the lignocellulosic material with a fluid formation, which contains at least one effect agent in a dissolved or dispersed form; impregnating the material with a hardenable aqueous composition, which contains at least one cross-linkable compound such as low-molecular weight compounds (V), having at least two N-bonded groups of formula (CH2OR) and/or one 1,2-bishydroxyethane-1,2-diyl group, bridging two nitrogen atoms, precondensates the compound (V), and reaction products or mixtures of the compound (V) with at least one alcohol such as 1-6C alkanols, 2-6C polyols and oligoalkylene glycols; and treating the material obtained at an elevated temperature. R : H or 1-4C alkyl. Independent claims are also included for: (1) a lignocellulosematerial, is obtained by the process; and (2) an aqueous composition comprising dissolved or dispersed form of effect agent and hardenable compound.