Abstract: Described is a method of treating wood without pressure using compositions comprising aqueous solutions of one or more lanthanide derivative. Also described is a composition comprising wood and lanthanides or lanthanide derivatives.

Abstract: This invention pertains to a method of surface impregnation of wood articles with a plastic and to the resulting wood articles. The method includes treating dried, finished wood articles comprising the steps of degassing the wood to a specified partial pressure, soaking the degassed wood at atmospheric pressure in a diallyl o-phthalate monomer-prepolymer solution for a specified time and polymerizing in the range of 200-210 deg. F in a forced air oven. The cured samples can then be buffed to obtain the desired finish.

Abstract: Use of finely divided aqueous cationic dispersions of synthetic resins obtainable by emulsion polymerization from suitable monomers and which contain cationic dispersion polymers, as impregnants and primers for consolidating and priming of porous absorbent substrates, preferably inorganic substrates such as, for example, masonry, concrete, plaster surfaces, gypsum surfaces, bricks or wood, by treating these substrates with the aqueous cationic dispersions whose polymer particles have mean particle diameters of 0.02 to 0.2 .mu.m.Aqueous cationic dispersions of synthetic resins exhibit a superior penetrating and permeating power, in particular on smooth plaster surfaces and smooth gypsum surfaces, compared with aqueous anionic or non-ionic dispersions of synthetic resins.

Abstract: A novel and improved photocurable coating composition is provided which comprises a polyfunctional ethylenically unsaturated cellulosic polymer which is derived from the reaction product of (a) at least one cellulosic polymer having isocyanate reactive hydroxyl functionality, and (b) at least one hydroxyl reactive poly (alpha, beta ethylenically unsaturated) isocyanate.

Abstract: A wood preservative solution comprising water, hexavalent chromium, copper and arsenic can be stabilized against precipitation by the addition of fluorine ion, thereby enhancing the useful life and safety of the solution. Fluoride salts like cerium fluoride, sodium fluoride and calcium fluoride are suitable sources for fluorine ion in such a solution. Wood treated with the preservative solution displays increased penetration, distribution and retention of chromium, copper and arsenic.

Abstract: Described is a method of treating wood with compositions comprising aqueous solutions of one or more lanthanide derivatives, whereby the composition is contacted with the wood under vacuum.

Abstract: A fire retardent for woody materials, which is an aqueous solution comprising 100 parts by weight as solids content of a water-soluble 3-(dialkylphosphonopropionamide) represented by the following general formula ##STR1## wherein each of R.sub.1 and R.sub.2 represents an alkyl group having 1 to 3 carbon atoms, and R.sub.3 represents a hyrogen atom or a methyl group, and at least 100 parts by weight as solids of a water-soluble melamine resin as essential ingredients and having a pH of not more than 3.

Abstract: A method of protecting wood that comprises applying to the surface of the wood a solution of sodium carbonate and sodium borate. In a further aspect wood is protected against fungal growth by applying to the surface of the wood a solution of sodium carbonate.

Abstract: In a process for the impregnation of wood, first a treatment is performed by inoculating impregnation with pasty impregnating salt or the like, introduced by injection needles, and immediately following, a tank impregnation is conducted with the use of a liquid impregnating agent.

Abstract: A wood preservative based on leaching-resistant, inorganic compounds for protection of wood and wood materials against wood-damaging insects and fungi, including wood-rot fungi, is disclosed. The wood preservative, which is fixed without chromium, contains as active ingredient in an aqueous solution which is stable on impregnation, (a) a Cu(II), Zn, Ni, Co, Fe, Mg and/or Mn salt of monofluorophosphoric acid, or (b) an alkali metal salt and/or ammonium salt of monofluorophosphoric acid, in the presence of a Zn, Ni, Co, Fe, Mg and/or Mn salt of hydrochloric, nitric or sulfuric acid and, optionally in addition to (a) or (b), one or more members of the group comprising NH.sub.3, HCl, HNO.sub.3, H.sub.2 SO.sub.4, HF, alkali metal hydrogen fluoride and ammonium hydrogen fluoride. Alternately, the composition contains (c) an alkali metal salt and/or ammonium salt of monofluorophosphoric acid in the presence of a Cu(II) salt of hydrochloric, nitric or sulfuric acid in a Cu.sup.2+ :PO.sub.3 F.sup.

Abstract: An agent for the protection of material containing an N-sulphenylated benzenesulphonamide of the formula ##STR1## wherein R.sup.1, and R.sup.2 and R.sup.3 independently of one another represent hydrogen, halogen, nitro, alkyl or halogenoalkyl andR.sup.4 denotes an unsubstituted or substituted, saturated or unsaturated, aliphatic or cycloaliphatic radical, the aliphatic radicals being uninterrupted or heteroatoms or being interrupted by one or more hetero-atoms. The N-sulphenylated benzenesulphonamide-containing agents are useful for protecting industrial materials, for example, paints and timber, against attack by microorganisms, such as bacteria, fungi, yeasts, algae, slimes and viruses.

Abstract: A method for the impregnation of wood to prevent attack by harmful agents such as decay fungi or mould fungi and bacteria by the application of an aqueous solution of an alkali lignin modified into a water-soluble form. Impregnation takes place in two stages, these being an initial stage in which the aqueous solution containing the lignin still in its water-soluble form and with a pH not exceeding 10 is applied to the timber, and a second stage in which the lignin is fixed as a water-insoluble form by the application to the timber of a weakly acidic aqueous solution containing metal ions by the addition of metal salt.

Abstract: The invention is a method for pressure treatment of wood using compositions comprising aqueous solutions of one or more lanthanide derivatives. Wood is immersed in a pressure vessel containing a lanthanide derivative composition, and hydrostatic pressure is applied. The treatment is carried out at temperatures not exceeding about 95.degree. C., and more preferably at between about 20.degree. C. and about 30.degree. C. Pressure should be greater than about atmospheric, and preferably about 10 psi to about 300 psi.

Abstract: Methods for impregnating the pores of at least partially dried wood with a phosphorus nitride, particularly P.sub.3 N.sub.5, to provide flame resistance are described. Preferably liquid slurries of the phosphorus nitride are impregnated into the exposed pores of the wood using pressure or preferably a partial vacuum in a confined space which removes air from the pores and allows the slurry to impregnate the wood. The liquid is then removed from the wood.

Abstract: Wood which is relatively poorer in connection with its ability to resist weathering, rotting, insect attack, etc., is made more resistant to such factors by a two-step process. The first step is to impregnate the poorer quality wood with an aqueous solution of tannin extract taken from a plant species which has superior weathering and other resistance properties. The wood treated with the tannin extract is then further treated with an aqueous solution of a fixative to prevent leaching of the extract during use of the wood, e.g., in exterior applications. The process of the present invention not only results in preservation of the wood, but can also be used for purposes of coloring the initial wood product. Abundant and relatively cheap woods can then be converted into wood products having qualities more closely like those of more expensive woods. In addition to the above-noted advantages, the present invention also uses treating substances which are non-hazardous and which are not damaging to the environment.

Abstract: A method of manufacturing a modified wood material, wherein a raw wood material is processed in a first bath of a first solution containing metallic ions high in the affinity and showing insoluble and non-flammable properties within the wood material, and then in a second bath of a second solution containing negative ions which produces an insoluble, non-flammable inorganic composition upon reaction with the metallic ions, whereby the obtained modified wood material is made to have the insoluble, non-flammable inorganic composition produced and fixed therein to allow the material to hold a good flame retardancy and excellent rotproof and mothproof properties.

Abstract: A process for treating wood panels is disclosed where the panels are placed in a closed treatment chamber and the chamber then evacuated. This removes free formaldehyde from panel pores and produces a subatmospheric pressure within the pores. The chamber is then pressurized with an ammonia and air mixture with ammonia in the mixture permeating the panel pores and reacting with free formaldehyde. The chamber is then evacuated to recover unreacted ammonia.

Abstract: Wood that is especially suited for the manufacture of resonating bodies, is improved according to a process in which small amounts of reactive components of thermosetting polymers are introduced into the wood shortly before or during a heat treatment under pressure.

Abstract: A method for the preservation of wood is disclosed whereby the wood is treated with an aqueous, alkaline solution of an alkylol group containing phenol.

Abstract: The invention relates to a method for the production of a wood veneer resistant to, amongst other things, micro-organisms and insects which is suitable for use in constructions intended for joinery, construction, packaging and installation applications.In accordance with one rational embodiment of the invention raw veneer is impregnated before it has dried, whereupon it is dried by heating. The impregnation medium is incorporated in this way after diffusion of the ring pores of the veneer once its cell walls have been sealed.

Abstract: A novel stable, homogeneous aqueous solution for application to wood surfaces is provided herein. The aqueous solution consists essentially of creosote, a conventional inorganic wood preservative component, ammonia and an oil. The oil and the creosote are present in specified proportions in the aqueous solution. When the solution is applied to wood, and the wood dried, a creosote-treated wood surface which may be painted is provided.

Abstract: A method for imparting flame resistance to exposed surfaces of wood by impregnating and reacting wood surfaces with dimethyl(oxiranylmethyl)phosphonate (DMOMP) is described. The resulting treated wood products are useful in applications where flame resistance is important.

Abstract: An improved process for preserving wood by impregnating the wood with metal salts is described. More particularly, the improved process comprises the steps of(A) contacting wood in a vessel with a solution containing at least one soluble metal salt of an organic carboxylic acid under conditions of time, temperature and pressure which are sufficient(i) to effect penetration of the solution into the wood, and(ii) to maintain the metal:acid ratio in the solution removed from the wood in step (B) substantially the same as the metal:acid ratio in the solution used to impregnate the wood in this step (A),(B) removing at least some of the solution from the wood by reducing the pressure within the vessel, and(C) subsequently heating the wood to a temperature sufficient to fix the metal to the wood.

Abstract: Disclosed is process for extracting fungi-toxic material from wood material of a species of wood which is resistant to fungi-growth. The process comprises providing a first quantity of the wood material, contacting said quantity with an extraction agent in an amount and for a time sufficient to extract essentially all fungi-toxic material in the wood material, separating the agent containing the fungi-toxic material from the wood material, contacting a second quantity of wood material with the separated extraction agent for a time sufficient to extract fungi-toxic material contained in the second quantity of wood material, and separating the extraction agent from the second quantity of wood material.

Abstract: In production of resin-treated woody material, powdered resin coating on a wooden crude board is combined with subsequent heating under pressure, preferably with use of backings. Concurrent coating and hardening of the resin, and bonding of the backings greatly simplify the process and equipments.

Abstract: Disclosed is a bioactive polymer comprising an effective biocidal amount of moieties derived from pyrithione and having the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are individually selected from hydrogen and alkyl groups having from 1 to 4 carbon atoms; and PT represents the pyrithione moiety which is defined as ##STR2## wherein R.sub.4, R.sub.5, R.sub.6 and R.sub.7 are individually selected from hydrogen and, a lower alkyl group having from 1 to about 8 carbon atoms, a lower alkoxy group having from 1 to about 8 carbon atoms, a nitro group and a halo group.

Abstract: Water dispersible compositions containing hydrocarbon wax are described which are useful in preparing aqueous water repellent systems. Aqueous water repellent systems containing a hydrocarbon wax also are described. The water repellent system comprises an aqueous system comprising water, a saturated hydrocarbon wax, at least one oil-soluble metal salt of an organic carboxylic acid, at least one surfactant and at least one hydrocarbon solvent. A process for impregnating permeable substrates such as wood, cloth, concrete, rope, etc. with the water repellent system is also described. Penetration of the various components into the substrate is obtained by brushing, dipping, soaking, spraying or immersion at atmospheric pressure, at elevated pressures or under vacuum. The oil-soluble metal salt often is a fungicide. Moreover, additional components can be contained in the aqueous system such as insecticides, colorants, flame retardants, moldicides, wood stabilizing agents, etc.

Abstract: A process for acetylating a wood material which comprises impregnating the wood material with an aqueous solution of an alkali metal acetate, drying the wood material containing the alkali metal acetate solution, and treating the dried wood material with acetic anhydride optionally diluted with an organic solvent at temperature between 100.degree. C. and 150.degree. C.

Abstract: A treatment for wood poles, as used for telecommunications and electric power poles, to reduce surface hardening comprises modifying the standard treatment solution by the addition of a polymer of ethylene oxide. A surface active agent is a further possible additive, and reduction of the hexavalent chrome ion in the standard solution is a further modification.

Abstract: A wood improver comprising a waste liquor produced by the digestion of pulp, such as kraft, sulfite or semichemical pulp, and optionally further containing a Steffen waste liquor from beet sugar plant and/or polyethylene glycol. Also disclosed is a method of improving the quality of wood by treating it with the improver to prevent its cracking during drying.

Abstract: A method for treating wood with an aqueous composition having fungicidal and insecticidal properties. The aqueous composition comprises(a) at least one oil-soluble metal salt of an organic carboxylic acid having fungicidal properties wherein the metal is zinc, chromium, iron, antimony, lead, mercury or a mixture thereof,(b) at least one halopyridyl phosphate of the formula ##STR1## wherein R represents a halopyridyl group, Z represents oxygen or sulfur, and each R' is independently a lower alkoxy, amino or lower alkylamino group,(c) at least one surfactant, and(d) from about 60 to 99% of water.Such compositions penetrate into both dry and green wood rather readily, and the result is wood which is resistant to fungi and insects.

Abstract: A process for impregnating green wood with oil-soluble metal salts is described. The method comprises(a) contacting the green wood with an aqueous system comprising(i) water,(ii) at least one oil-soluble metal salt of an organic carboxylic acid, and(iii) at least one surfactantfor a period of time sufficient to enable the metal salt to penetrate into the wood, and(b) removing the wood from contact with the aqueous system. Good penetration of the metal salt into the green wood is realized by this method when conducted under vacuum, at atmospheric pressure or at elevated pressures. Preferably, the metal salt is a preservative such as a fungicide, and the aqueous system also contains other desirable components such as fire retardants, coloring agents and insecticides.

Abstract: The invention is concerned with novel dithioketal derivatives of 1-(2-aryl-2-oxoethyl)-1H-imidazoles and sulfones and sulfoxides derived therefrom, said compounds being useful as antimicrobial agents.

Abstract: The invention encompasses a petrolatum wax-biocidal composition and a method of preserving wood with the composition.

Abstract: Wood and wooden materials are treated with aqueous treatment media. These media contain a water-soluble or water-dispersible, oxidatively drying, organic binder. The latter is a low-molecular weight, optionally modified 1,3-butadiene polymer which carries quaternary ammonium groups. This polymer is obtained by reacting an epoxy-group-containing polymer with a secondary and/or primary aliphatic amine and reacting the amination product with a low-molecular weight monoepoxide, during which process 0.05-0.5 mole of the quaternizable amino groups is quaternized per 100 g of the amination product.The treatment media preferably additionally contain wood preservatives and additives customary in the impregnating and varnishing field.

Abstract: A high wet strength waferboard panel is disclosed made from aspen species of wood flakes or equivalent with average specific gravity less than 0.6 and having wet strength equivalent to plywood. At least a portion of the wood wafers are oriented generally in a lengthwise direction such that the length to width strength ratio of the panel, measured as modulus of rupture, is in the range of about 1.3:1 to 2:1, the density of the waferboard panel being in the range of about 38 to 45 lb/ft.sup.3, the content of adhesive resin in the panel being in the range of about 4% to 10%, the content of wax in the panel being in the range of about 1% to 21/2% and the thickness of the panel being in the range of about 3/8 to 11/2 inches. The fully soaked panel having a moisture content of at least about 30% with an MOR lengthwise greater than about 2900 lb/in.sup.2 and an MOE lengthwise greater than about 0.9.times.10.sup.6 lb/in.sup.2.

Abstract: Disclosed is a solid binder composition containing from about 70 to about 98 percent by weight of TDI residue and correspondingly from about 2 to about 30 percent by weight of a select ester derived from a dicarboxylic acid. When the binder composition is used in making lignocellulosic composite materials, such as particle board, the ester acts as an effective internal mold release agent, facilitating release of the composite material from the mold.

Abstract: Flameproofing of various combustible materials, particularly wood-shake shingles used in roofing of houses and tar paper sheets, by coating and impregnating such combustible materials with a liquid composition comprising a fire or flame retardant, exemplified by phosphorus- and halogen-containing organic compounds, a liquid curable organo binder, a curing agent or, more particularly, a photoiniator. After the coating and/or impregnation, curing is effected by either sunlight or ultraviolet light or ionizing radiation.

Abstract: There is disclosed a method of coating combustible material such as wood, plywood, shingles and the like with a flameproofing composition. The method employs a flame coating composition which is a mixture of a thermoplastic, ambient-temperature, film former such as a polyvinyl acrylic acetate latex, and alumina trihydrate and glass fibers. The ambient temperature film former is a conventional latex used for coating compositions and should have the property of softening at or below the dehydration temperature of alumina trihydrate (about 280 degrees F.) and be capable of forming a stable foam at such temperatures. The alumina, which comprises the major portion of the coating composition, dehydrates when subjected to flame temperatures and the water vapor released from the alumina forms a stable foam.

Abstract: Granular sorbent material comprising a granular high surface area support impregnated with a water soluble, essentially non-volatile primary or secondary amine with equivalent weight less than about 400 and bearing either zero or two carbonyl substituents attached directly to the amino nitrogen atom is disclosed. The resulting material can be used as the filtration media in respirators, powered air purifiers, room air purifiers, ventilation filters, exhaust filters, process gas filters and the like to reduce the formaldehyde content of air.

Abstract: Wood is preserved with a water-based treating solution containing a halogenated phenol wood preservative such as pentachlorophenol, a phenolic resin prepolymer such as a phenol formaldehyde prepolymer, and a coupling or solubilizing agent for enhancing the water compatibility of the various ingredients. The treatment is carried out by exposing the wood, while submerged in the treating solution, so one or more cycles of reduced pressure (i.e. vacuum) and elevated pressure.

Abstract: Timber support poles are given desired breaking properties to reduce the deceleration of a vehicle that collides with the pole by cutting one or more recesses in the pole, and filling the recesses with a polymeric filler composition.

Abstract: The invention relates to reinforced beam sections produced by forming the cross-sectional configuration of wood particle board, e.g. such as have been provided with bonded-in reinforcing threads (4,5,6,32,48). The latter have thereby been laid in the zones (33,34,45) of the boards where the beam section configuration changes direction during the formation of the beam. Beam sections in accordance with the invention will be light, corrosion-resistant and saving on material as well as having high breaking strength, due to the reinforcement. The field of use for such beam sections is very varied, but among more obvious uses may be mentioned those as beams in housing structures and different kinds of batten in the building trade. A method of laying the reinforcing threads in predetermined zones in the boards is also embraced by the invention.

Abstract: An impregnating agent for a cellulose-containing material, comprising(a) An alkyltrialkoxysilane of the formula R Si (OR').sub.3 in which R represents an alkyl moiety of 1 to 18 carbon atoms and R' an alkyl moiety of 1 to 4 carbon atoms, and(b) Chelate of alcoholate of tin or of a metal of the third main group or fourth or fifth secondary group of the periodic system of the elements, and/or optionally(c) Silicic acid ester,and a method for water-proofing cellulosic materials by contacting the same with such impregnating agent.

Abstract: An article and method for treating wood to promote preservation and inhibit fungi and bacteria attack, comprising the wood treated with a polymer with pendant groups containing pyridine rings complexed with copper. Treatment can include impregnating the wood through pressure, vacuum, soaking or other means or more superficial applications to the wood surface through brushing, painting, dipping or the like. Preferred are one-step and two-step procedures with poly-4-vinylpyridine as the polymer of choice and copper chloride or copper sulfate as the preferred copper ion source. Treatment can be with the monomer or homopolymer form, followed by polymerization and/or cross-linking in situ in the wood after application.

Abstract: A wet-felted mat of wood fibers is acetylated by coating the mat with a quantity of acetic anhydride ranging from 5 to 70% by volume of the mat and heating the mat at a temperature of from 150.degree. to 300.degree. F. while confining substantially all of the acetic anhydride within the mat for about 20 to 120 minutes. The acetylated mat is pressed into hardboard which may be bent into a variety of loops, spirals, helices, and other curvilinear shapes to make articles of furniture, protective packaging products and the like.

Abstract: Wood is preserved with a water-based treating solution containing a halogenated phenol wood preservative such as pentachlorphenol, a phenolic resin prepolymer such as a phenol formaldehyde prepolymer, and a coupling or solubilizing agent for enhancing the water compatibility of the various ingredients. The treatment is carried out by exposing the wood, while submerged in the treating solution, so one or more cycles of reduced pressure (i.e. vacuum) and elevated pressure.

Abstract: The invention is a composition of matter and method for its use in reducing formaldehyde emission from wood composite panels bonded with aminoplast resins. The preferred composition comprises urea, a carbohydrate based material such as cooked or gelatinized starch, and an acidic catalyst for the resin. The ratio of urea to carbohydrate based material is in the range of 10:1 to 40:1 while the urea forms from 20-60% of the composition. In use, the composition is preferably sprayed on the wood particles, flakes or fiber in the blender at the same time resin is added. Typical usage is 0.4-3 parts, on a urea basis, added to each 100 parts of dry wood substance. Depending on several factors, the reduction in formaldehyde emission ranges from 60-90% without serious deterioration occurring in any other product physical properties.

Abstract: A method for the treatment of wood by a wood preserving agent in a liquid or paste-like form, to be positioned (inserted) in a recess in the wood, which recess is subsequently sealed off.The wood preserving agent contains a water-expelling agent, a water-repellent agent and a biocide.

Abstract: A composition for impregnating wood with pentachlorophenol is prepared by dissolving pentachlorophenol in .[.a petroleum fraction.]. .Iadd.an organic solvent .Iaddend.at least 50% of which will distill above 485.degree. F., and mixing the resulting solution with water to produce a finely divided dispersion of the solution in water.