Wood impregnated with furan polymer

FIELD: impregnation of wood.

SUBSTANCE: the suggested wood should be obtained due to impregnating wood with the mixture based upon polymerized monomer of furfuryl alcohol that contains, at least, water, furfuryl alcohol, a stabilizer and an initiator, moreover, the stabilizer should be chosen out of sodium carbonate, sodium bicarbonate, sodium citrate, phosphates and water-soluble derivatives of lignin such as calcium and ammonium salts of ligninsulfonic acids, moreover, the mixture additionally contains the initiator chosen out of maleic anhydride, phthalic anhydride, maleic acid, malic acid, phthalic acid, benzoic acid, malonic acid, ascorbic acid, citric acid, zinc chloride, aluminum chloride, other cyclic organic anhydrides and acids and their combinations, at pH ranged 2.5-4.0. It has been, also, described the method for obtaining the wood impregnated with furan polymer due to impregnating the wood with the mixture based upon polymerized monomer of furfuryl alcohol followed by hardening at different temperature modes. The suggested wood is of high stability of sizes under conditions of altering moisture and increased resistance to rotting.

EFFECT: higher efficiency.

7 cl, 2 tbl

 

The technical field to which the invention relates.

Described herein the invention relates to saturated furan polymer wood that is uniform in color and density in the entire treated area. To obtain such a material source of wood harvesting is impregnated with a mixture on the basis of the polymerized furfuryl alcohol monomer, and the mixture contains at least water, furfuryl alcohol, stabilizer and at least one initiator. In addition, the invention relates to a method of manufacturing a wood impregnated with furan and its application.

The level of technology

Furfuryl alcohol in an acidic medium is polymerized (turns into the resin). The reaction of polymerization initiated by the acid. Strong acids cause violent polymerization, which due to its intensity widespread use is not found. However, this reaction can be adjusted by applying weak, for example, organic acid. It was shown that in the case when the impregnating substances to porous materials like wood, it is desirable to apply furfuryl alcohol, it is important to choose a weak acid, is not separable from the specified alcohol promotion in volume of the porous medium. It is also useful to this weak acid with respect to the wood possessed chemical DDPs is the your. This netdelay mixture, characterized by high affinity to wood, is described in international application WO 02/30638.

For some applications it is desirable to impregnate porous materials like wood furfuryl alcohol, less initiated than those described in WO 02/30638. It turned out that the wood is reduced concentrations of polymerized furfuryl alcohol (such a polymer is also called furan resin or furan resin) nevertheless provide useful properties at low cost and little change in appearance. Wood, manufactured according to WO 02/30638, has a very dark color. At lower concentrations possible colors from light yellow to dark brown.

The method of regulating the concentration of furan polymer in a porous material is the use of liquid media initiated furfuryl alcohol. Media and furfuryl alcohol together absorbed in a porous material. After impregnation of the carrier of a porous material removed and initiated the alcohol remains in the specified zones in the material volume. Polymerization initiated by the furfuryl alcohol may occur before the selection of inert carrier, in the process of such selection or after him. Wood and wood materials are the main objects for applied what I considered the invention, however, the same impregnation can be and other porous substances, including brick, Portland cement concrete or stone.

Water refers to an inexpensive connections, good for the environment. As furfuryl alcohol is soluble in water, it can be used as a carrier to dilute the uninitiated furfuryl alcohol, but in this case the alcohol to dry out almost won.

When mixing initiator, an organic acid, furfuryl alcohol is formed ester. It has limited solubility in water, i.e. a mixture is formed of two phases. When shaking formed emulsion. In an earlier study of a similar mixture was assumed that the emulsion will not be good to penetrate into the wood. Therefore, experiments were carried out, aimed at the transformation mixture in a single phase. These experiments showed that the formation of stable single-phase mixture catalyzed furfuryl alcohol and water resulted in the addition of certain chemicals. This approach is described in international application WO 02/060660. Useful in this regard stabilizing chemicals were identified borax (decahydrate of sodium tetraborate and sodium salts of lignosulphonic acids.

In the absence of stabilizer is Torah polymerization of furfuryl alcohol, containing as an initiator an organic acid and then mixed with water, will be slow. This slow reaction polymerization produces accelerating its acid. This process limits the useful duration of the mixture. Further work with these mixtures showed that the main function of the stabilizer is that the acidity of the mixture did not increase, but remained stable. The most useful time steps mixture is extended. This is a follow-up study also showed that there are many chemicals that can perform the function of the stabilizer. In this large group of possible candidates applied first borax and sodium salts of lignosulphonic acids should only be considered as examples of such compounds.

In the following study, the wood was soaked with emulsion initiated furfuryl alcohol in water, and the emulsion did not contain stabilizers. In the calculation of water concentration of maleic anhydride and furfuryl alcohol were respectively 1% and 12%. After vigorous stirring was formed turbid mixture, which is well-soaked wood and after heating polymerizability in its internal volume. Other concentrations also form a suitable mixture. Thus, for certain examples, the events and processes regarding the wood, apply the stabilizers initiated in a mixture of furfuryl alcohol and water is not necessary.

Further research showed that the sequence of mixing of the initiator, furfuryl alcohol and water is not an important factor. The same two-phase mixture was formed regardless of added if the initiator in water with subsequent introduction of furfuryl alcohol or furfuryl alcohol was added to the water prior to the introduction of the initiator.

For the preparation of stable mixtures important parameter was the pH. Correctly selected range of pH provided long term storage of the mixed solution, creating a higher level of acidity sufficient to initiate polymerization during heating. However, in the preparation of this mixture a significant factor may be the sequence of mixing. The acidity of the furfuryl alcohol may affect the dose and the time and storage conditions. Therefore, a good approach to obtain a homogeneous, stable functioning of mixtures is the mixing of furfuryl alcohol with water in the first stage and then adding the correct amounts of acid initiator and stabilizer, which performs a buffer function for a given pH value.

In the absence of buffer hundred is Ilizarov suitable emulsion initiated furfuryl alcohol in water usually has a pH of about 2.3, declining to 1.4 when curing the heat.

Stabilizers supported the pH level suitable machining mixtures to complete the impregnation of wood. Then the pH was lowered (the environment was made more acidic), thereby accelerating the curing. Stable mixture, kept in good conditions, typically had a pH average of 3.5 to 4.0. When heated in order to initiate polymerization, the pH value was lowered to 2.5 to 2.8.

Disclosure of inventions

One of the tasks, which is aimed at solving the present invention is to obtain wood impregnated furan polymer, by changing the composition of the cell walls of wood with the same chemical monomer, which is described in WO 02/30638, but with the use of smaller quantities of chemical drug.

Another object of the invention is the provision of uniform distribution of chemicals in the wood, impregnated furan polymer. This effect is achieved through the use of water as a diluent that is beneficial to the environment and the production process, and also provides a uniform, controlled holding small amounts of the active chemical compound in the treated area of the wood.

Another problem to which the invention is directed, is to get a wood propiano the furan polymer, which has improved properties, in particular, from the viewpoint of dimensional stability and resistance to rot and weathering.

According to the present invention these and other problems are solved by a product, process, and variations in their application, as set forth in the claims.

In one aspect of the present invention corresponds to the saturated furan polymer wood, obtained by impregnation of the mixture on the basis of the polymerized furfuryl alcohol monomer. This mixture contains at least water, furfuryl alcohol, an initiator and a stabilizer selected from water-soluble lignin derivatives and combinations thereof. This invention is characterized, firstly, by the use of a stabilizer selected from sodium carbonate, sodium bicarbonate, sodium citrate, phosphates and water-soluble lignin derivatives, such as calcium and ammonium salts of lignosulfonic acids, and, secondly, the use of an initiator selected from maleic anhydride, phthalic anhydride, maleic acid, malic acid, phthalic acid, benzoic acid, malonic acid, ascorbic acid, boric acid, citric acid, zinc chloride, aluminium chloride, other cyclic organic anhydrides and acids, and combinations thereof.

Received what I acceptable shelf life during storage and optimal conditions polimerizuet the pH value of this mixture on the basis of furfuryl alcohol should be in the range from 2.5 to 4.

It should be noted that the stabilizer can be used both by itself and in combination, at least with the other stabilizer. This applies to the specified initiator.

In another aspect of the invention corresponds to the method of manufacturing of wood, impregnated furan polymer. This wood get through impregnation with a mixture on the basis of the polymerized furfuryl alcohol monomer. This mixture contains at least water, furfuryl alcohol, an initiator and a stabilizer selected from water-soluble lignin derivatives and combinations thereof. This invention is characterized by the fact that the use, first, the stabilizer is selected from sodium carbonate, sodium bicarbonate, sodium citrate, phosphates and water-soluble lignin derivatives, such as calcium and ammonium salts of lignosulfonic acids, and, secondly, the initiator is selected from maleic anhydride, phthalic anhydride, maleic acid, malic acid, phthalic acid, benzoic acid, malonic acid, ascorbic acid, boric acid, citric acid, zinc chloride, aluminium chloride, other cyclic organic anhydrides and acids, and combinations thereof. For impregnation is followed by a stage of curing.

May be a variety of application wood impregnated furan polymer. However, PR is doctitle its use as structural elements of buildings (facing, cornice, exterior sheathing, exterior window sills and thresholds, frames, millwork), ship parts (railings, cladding, decking deck), coastal structures and devices (docks, piers, lobster traps, foothold dams), objects, outdoor furniture, decks, railings and stairs, walkways, sidewalks, equipment for playgrounds), parts of bridges (beams, railings, flooring), railroad sleeping cars, blinds cooling towers, supports, communications, heavy timber, mailboxes, poles, road objects (rack and panel, road barriers, index rack, lighting columns, decking, flooring and containers (tanks, tubs, buckets).

Two key features of the invention are: 1) the use of water as a diluent catalyzed furfuryl alcohol monomer and 2) the use of stabilizers, allowing initiated the monomer to become water-soluble and remain stable during storage.

If you are mixing to be limited only by the sign of 1), the emulsion is formed with a limited shelf life when stored. It can soak into the wood and dried only in the case of use within a few days. For longer storage catalyzed furfuryl alcohol is polymerized to such a level, to the which makes the mixture is useless for impregnation of wood. The use of characteristic 2) results in a mixture that is stable during storage for several months.

The affinity to the wood of the initiators is about the same as that of the furfuryl alcohol. In addition, they are associated with alcohol chemical way. Therefore, the initiators penetrate into the wood, remaining in solution throughout the depth of his penetration. At any point of penetration of the solution retains the ability to polymerization. The initiators are selected from any water-soluble organic compounds containing anhydride, as well as from acids, including maleic, malic, phthalic, citric and benzoic acids. However, in the preferred embodiment, it is possible to use a compound selected from maleic anhydride, phthalic anhydride, and combinations thereof, with the preferred maleic or phthalic anhydride, used by itself. Stabilizer in addition to the above-mentioned substances can be also borax and sodium salts of lignosulphonic acids. To prepare the processing mixture with long-term stability according to the sign of 2), dissolved in water, at least one of the initiators, preferably only one of them, and one or two of the stabilizer. Then add furfuryl alcohol, shaping the mixture, which at room temperature has a shelf life equal to several them months. In alternative furfuryl alcohol can be dissolved in water and then add stabilizer (stabilizer) and the initiator.

If you want a limited surface impregnation or penetration in the texture on the face, you can apply brushing, rolling, spraying or wetting using the impregnating mixture.

For easy impregnated wood, when there is no need for penetration depth, can be limited only by vacuum processing. To ensure a deep and uniform penetration, there are three options: a) pressure only (1×105-10×105PA), b) vacuum followed by pressure (the process of anticipation of wood under pressure with pre-vacuum), and C) atmospheric or low (1×105PA) the pressure is then increased and then finally vacuum (the process of soaking the wood under pressure, without prior degassing, the so-called method of limited absorption).

For wood species with poor penetrating power, such as spruce, it is possible to apply the method of oscillating pressure.

The duration of all three processes depend on many factors, including the capacity of the equipment, the size of the wood, type of wood and the desired penetration.

Used the usual method of impregnation (the process of anticipation of wood under pressure with pre-vacuum) according to the present invention is carried out in the following sequence:

1) loading capacity wood and fixing weight, preventing floating of the wood,

2) closing of the loading door and the creation of appropriate low (partial) vacuum,

3) filling capacity of the processing mixture, followed by maintaining the vacuum,

4) the application of pressure to submerged wood, the pressure increases up to 5×105-10×105PA depending on wood species and other factors

5) after exposure to pressure for a sufficient time, the pressure decrease up to 2×105PA or 3×105PA and eviction processing fluid remaining pressure

6) complete pressure relief opening of the loading door and move-treated wood on a plot of cure.

For a zone to be processed, the moisture content (SW) in the wood must be below the saturation point of the fibers (SV approximately 30%). The lower the moisture content, the greater the amount of chemical can be absorbed. If you want specific planned quantity of specified substances, it is necessary to consider the moisture content in wood, as well as the amount absorbed by the mixture and adjust the concentration of the chemical processing of the drug.

The implementation of the invention

The following examples represent the go to further illustrate the invention, moreover, they should not be construed as making any restrictions in the scope of the invention (see table 1).

The concentration of the processing mixtures successfully authenticated, in terms of the mass of water:

Table 1
Stabilizer (stabilizer)Stabilizer (stabilizer), %The initiator (maleic anhydride), %Furfuryl alcohol, %
Borax + lignin8,52,330
Borax + lignin5,5312
Borax + lignin5,528
Borax + lignin5,5216
Borax + lignin5,5224
Borax + lignin5,5232
Borax + lignin5,5240
Lignin30,512
Sodium bicarbonate + lignin4212
Sodium bicarbonate + lignin4,75212
Sodium bicarbonate + lignin1,812
Sodium carbonate0,20,412
Sodium carbonate0,5112
Sodium carbonate1212
Sodium carbonate1,753,512

Depending on the desired content of the product polymer and the desired properties of the material can be applied to any concentration of furfuryl alcohol in water (in terms of the solution is from about 5% to almost 100%) with the corresponding quantities of the initiator and buffer substances. At levels below about 5% in the wood is too low polymer to modify the properties of a useful way, and when approaching 100% of the properties are very similar to the properties of the polymer described in WO 02/30638. However, low concentrations may be useful in the case of retention is usually leached impregnating compositions, such as compositions based on boron and copper.

The blending operation usually start heating the water to about 40°C. This creates favorable conditions for adding stabiliser/stabilizer (if used) and maleic or phthalic anhydride. After complete dissolution of these solid additives in water solution Oh adut to 20° With, and then add with stirring furfuryl alcohol. The resulting product is stored at a temperature of 15-20°C. In the alternative furfuryl alcohol can be added to water and then to introduce other ingredients. However, at elevated temperature to perform this operation is almost impossible, because in the mixture may occur polymerization. In this regard, this option requires a longer time to dissolve the solid components, since it must be done at room temperature or in even colder conditions.

Curing may occur in the temperature range from about 25°to 140°C. the Preferred interval is the interval of temperatures from 70°to 140°C. Low temperatures (below about 40° (C) require a long curing time (days or weeks). In the range of from about 70°With up to approximately 100°the curing time is hours. Above 100°With the duration of curing even shorter, but it is necessary to regulate humidity conditions, otherwise a rapid drying may cause cracking or splitting of the wood.

According to the present invention, the curing steam or hot humid air in the temperature range of approximately 70-100°is effective is when using a fixed temperature, lying in this interval. In addition, in the process of curing and drying temperature can be increased. Essentially, these temperatures correspond to the normal values for drying in the oven. Good results also lead to the hardening and drying in hot oil with temperatures from 80°to 120°as at a fixed temperature in this interval, and raising it within the specified interval as the processes of curing and drying. As can be positively evaluated curing and drying mode controlled humidity with a fixed or increasing temperature in the range of 100-120°C. These values correspond to drying at a high temperature furnace. When applying a given ratio of furfuryl alcohol/initiator furfuryl alcohol will be easy to cure at these temperatures. For material thickness of 10-20 mm, the curing process will take place for two or three hours, but dried to the final moisture content of takes more time.

The source material is the wood material. This is usually lumber, including Board (thick lumber), but also possible and wood composites, such as stove with oriented fibers and wood stove. You can use wood materials of any size.

From the point of view of uniformity of propitia the Oia and the duration of intervals of time, the important parameter is the length of the wood materials since the processing mixture moves along the length very quickly, and across the grain (perpendicular to the longitudinal axis) is very slow. In the case of wood, with good permeability, such as beech or birch, uniformity of processing is determined by how well impregnating mixture moves from the pores to the fibers and preserves uniformity in its movement along the length. After such impregnation of wood formed by the above method woody material has uniform properties throughout the volume. Constant in the whole volume of color, mechanical properties, and resistance to moisture, weathering and decomposition. Different wood species and even different plates of the same species because of differences in permeability can be impregnated with different. The reason for this phenomenon lies in the nature of wood. For species with low permeability, soaking the fibres are slow and the main direction of impregnation may be oriented across the grain. In this case, the processing mixture and acquired properties remain uniform within the depth of penetration.

As a result of various wood material, including cheap modification and waste can be used for production of valuable materials from wood, they are arousih, for example, teak, mahogany, and others, and also for giving to these materials new properties, such as resistance to moisture and weathering, and simple, and reduced requirements for maintenance during operation.

To select combinations that could lead to water-soluble curable mixture with practical shelf life during storage were conducted pilot tests of various types and amounts of initiator and stabilizers. After many experiments, some issues have been made clear:

1. From all tested initiators of polymerization of the best was the maleic anhydride. A desirable component of the specified anhydride is also because, in all likelihood, relative to the wood he performs the function of a binding agent.

2. Stabilizers helped to preserve the homogeneity of the mixture over a longer period of time. Otherwise, it was divided into components, one of which was partially settled on the bottom. To make the mixture suitable in the absence of stabilizers required vigorous agitation, forming an emulsion. This emulsion had a shelf life, limited to the time when the polymerization was making it unsuitable for release.

3. For the formation of a stable homogeneous mixture, which then could polimerizuet the I inside wood you want the pH value of the mixture with anti-roll (stabilizer) was moderately acidic range.

4. When heated, the mixture pH was decreased (environment became more acidic), initiating curing.

As stabilizers were tested surfactants (Malaysia substances and detergents) and buffer compounds. To obtain homogeneous mixtures, well penetrating into the wood, led to the use of borax. It turned out that a mixture containing borax and 30% consisting of furfuryl alcohol, after storage for more than one year at room temperature was still maintained its suitability. Further investigation found that well show themselves and other stabilizers, such as washing soda (sodium carbonate) and baking soda (sodium bicarbonate). These stabilizers support processing the mixture at a constant pH level (they have a mixture of buffer effect) as long as the wood is not saturated. Then the pH was decreased (environment became more acidic), initiating the polymerization. The buffer mixture at proper storage usually had a pH value between 3.5 and 4.0. When heated in the curing process, the pH was reduced to values in the range of 2.5-2.8 happened polymerization. Good shelf life during storage showed buffer mixtures based on sodium bicarbonate. The use of carbon fiber is sodium as a buffer connection also results in a workable mixture, even at lower concentrations than in the case of borax or sodium bicarbonate. It was shown that the stabilizer function is performed and lignin derivatives, applied themselves. However, the lignin may cause less homogeneous impregnation.

Catalyzed emulsion that does not use the buffer stabilizers, usually made so that their pH value was about 2.3, falling to 1.4 when curing the heat.

It was shown that protection of the wood from moisture and rotting provide a mixture with a concentration of furfuryl alcohol approximately 8-90% water (9-90% (based on solution), and the advantage in this plan have a higher concentration. However, lower concentrations also improve material properties, making them more attractive for applications where untreated wood is wasted. Of special interest such low concentrations are due to the low cost and light in colour. However, it is practical and useful to ensure the protection of the full range of concentrations offered a mixture of water-based, corresponding to the following boundary value percentage (based on solution):

Table 2
Furfari the new alcohol InitiatorStabilizer
BottomTopBottomTopBottomTop
290250,510

1. Saturated furan polymer wood, obtained by impregnation of the wood with a mixture on the basis of the polymerized furfuryl alcohol monomer containing at least water, furfuryl alcohol, stabilizer and initiator, and the stabilizer is selected from sodium carbonate, sodium bicarbonate, sodium citrate, phosphates and water-soluble lignin derivatives, such as calcium and ammonium salts of lignosulfonic acid, the mixture further comprises an initiator selected from maleic anhydride, phthalic anhydride, maleic acid, malic acid, phthalic acid, benzoic acid, malonic acid, ascorbic acid, boric acid, citric acid, chloride zinc, aluminium chloride, other cyclic organic anhydrides and acids, and combinations thereof, and has a pH from 2.5 to 4.0.

2. The method of obtaining wood impregnated furan polymer by soaking the wood with a mixture on the basis of the polymerized furfuryl alcohol monomer, with the holding, at least, water, furfuryl alcohol, stabilizer and initiator, and use a stabilizer selected from sodium carbonate, sodium bicarbonate, sodium citrate, phosphates and water-soluble lignin derivatives, such as calcium and ammonium salts of lignosulfonic acid, and an initiator selected from maleic anhydride, phthalic anhydride, maleic acid, malic acid, phthalic acid, benzoic acid, malonic acid, ascorbic acid, boric acid, citric acid, zinc chloride, aluminium chloride, other cyclic organic anhydrides and acids, and combinations thereof, with the subsequent stage of curing.

3. The method according to claim 2, characterized in that the curing is carried out at room temperature for several days or weeks.

4. The method according to claim 2, characterized in that the curing is carried out at a temperature of 70-140°C.

5. The method according to claim 2, characterized in that the curing is carried out by drying in a furnace using normal temperature conditions for drying raw lumber of the same size and breed, that of the impregnated material, with temperatures at the beginning of curing about 45°and at the end of about 90°S, with a final stage additional heat treatment at a temperature of 100-140°for a material with maximum hardness and the degree is completion of drying.

6. The method according to claim 5, characterized in that the curing and drying is carried out with the use of high temperature regimes of the furnace in the temperature range of 80-120°With end stage additional curing at a temperature of 120-140°for a material with maximum hardness and degree of drying.

7. The method according to claim 2, characterized in that the curing is carried out by immersing the treated material in the hot oil at a temperature of 80-120°C, and the temperature select fixed or increase as the course of curing and drying, starting from the lower part of the specified interval.



 

Same patents:

FIELD: impregnation of wood.

SUBSTANCE: the suggested wood should be obtained due to impregnating wood with the mixture based upon polymerized monomer of furfuryl alcohol that contains, at least, water, furfuryl alcohol, a stabilizing additional solvent chosen out of acetone or alcohol at low boiling point such as methanol, ethanol or isopropanol and their combinations, and an initiator chosen out of maleic anhydride, phthalic anhydride, maleic acid, malic acid, phthalic acid, benzoic acid, citric acid, zinc chloride, aluminum chloride, other cyclic organic anhydrides and acids and their combinations. It has been, also, described the method for obtaining the wood impregnated with furan polymer due to a single-stage impregnation of wood with the mixture based upon polymerized monomer of furfuryl alcohol followed by hardening stage. The suggested wood is of high stability of sizes under conditions of altering moisture and increased resistance to rotting.

EFFECT: higher efficiency.

8 cl, 5 tbl

FIELD: wood materials.

SUBSTANCE: invention relates to a method for protection of wood providing to confer its hydrophobic properties for enhancing its longevity and stability of sizes. Invention describes a method for chemical treatment of lignocellulose materials, in particular, a wood lump. Indicated material is impregnated with a chemical agent containing hydrocarbon chains and this agent is chosen from mixed anhydrides containing the first hydrocarbon chain R and the second hydrocarbon chain R1 wherein R or R1 represents (C2-C4)-carboxylic acid, and R1 and R represents saturated or unsaturated (C6-C24)-fatty acid with exception mixed anhydride of acetic/benzoic acid. Indicated agent is useful for carrying out grafting based on a covalent bond in a great number of hydrocarbon chains with indicated materials. Grafting is carried out by the esterification reaction of indicated lignocellulose materials using a chemical agent chosen from organic anhydrides. Impregnation is carried out in the presence of a basic, neutral or weak acid catalyst and in the absence of catalyst also by immersion and irrigation in autoclave. Treatment is carried out at temperature from room value to 150°C but preferably from 100°C to 140°C. Also, invention describes an article based on lignocellulose fibers material, in particular, wood lump prepared by above described method. Proposed method provides preparing lignocellulose material, in particular, a wood lump with uniform fibers and smooth shape showing the absorption coefficient 3.5% and the swelling coefficient 3.5%.

EFFECT: improved method of treatment.

16 cl, 3 dwg, 3 tbl, 2 ex

FIELD: wood working.

SUBSTANCE: antiseptic comprises oil fractions of thermo-catalytic gas oil and directly distilled gas oil.

EFFECT: improved quality of impregnation.

1 tbl, 5 ex

FIELD: impregnating materials.

SUBSTANCE: invention relates to production of antiseptic impregnating compositions used to protect wood against biodegradation, especially to protect wooden ties and timber. Petroleum-origin antiseptic, commercial preservative liquid, is described containing in variable proportions oily fractions based on light and/or heavy gas oils obtained in secondary processes of petroleum feedstock processing such as catalytic cracking of vacuum gas oil or mixed feedstock, thermal cracking of distillate feedstock including catalytic cracking heavy gas oil blended with lube oil production extracts, straight-run atmospheric and vacuum gas oils, bottom residues (mazuts, goudrons, long residuum, cracking residues) playing role of color and freezing temperature regulators, as well as spent motor oil, extracts from oil selective treatment processes, phenol-free resin from phenol-acetone production process, ethylbenzene resin from ethylbenzene production process, heavy tar from pyrolysis process, and also biocidal nitrogen-containing admixtures: 8-hydroxyquinoline, 5,7-dibromohydroxyquinoline, p-nitrosodimethylaniline, 1,2- and 1,4-naphthoquinones, 2,3-dichloronaphthoquinone, xanthogenate-based additive "LZ-23K", and sulfonate agents, al used at variable proportions.

EFFECT: enlarged resource for oily antiseptics for impregnation of wood due to use various-type petroleum products and enabled variation in viscosity, freezing temperature, and flash points.

17 cl, 40 ex

FIELD: wood-working industry.

SUBSTANCE: described is the wood impregnated with furan polymer obtained by impregnation of wood with solution of polymerized monomer of furfural alcohol containing water, stabilizers in the form of borax and sodium salts of lignosulfone acids, furfural alcohol and at least one additional compound selected from maleic anhydride, phthalic anhydride, maleic acid, phthalic acid and their combinations. Described also is the method of wood treatment by single-stage impregnation with a solution of polymerized monomer of furfural alcohol, subsequent hardening at a temperature of 70-140C providing drying in an oven.

EFFECT: enhanced stability of dimensions in the conditions of varying moisture content, enhanced hardness and resistance to putrefaction.

11 cl, 5 tbl

FIELD: building materials industry; production and application of the furan polymeric compound permeated timber-based materials.

SUBSTANCE: the invention is pertaining to the field of building materials industry, mainly, to production and application of the furan polymeric compound permeated timber-based materials. The

offered timber-based material is permeated with the solution of the polymerized monomer of the furfural alcohol consisting of the furfuryl alcohol and one additional compound dissolved directly in the indicated furfuryl alcohol to produce the treating solution. At that the indicated additional compound is chosen from the maleic anhydride and the phthalic anhydride. The invention also presents the method of production of the timber-based material permeated with the furan polymeric compound and the way of its application. The technical result of the invention ensures, that the timber-based material permeated with the furan polymeric compound is homogeneous in color and density in the whole treated zone.

EFFECT: the invention ensures, that the produced timber-based material permeated with the furan polymeric compound is homogeneous in color and density in the whole treated zone.

8 cl, 1 tbl, 1 ex

FIELD: petroleum products and antiseptic materials.

SUBSTANCE: invention is directed to protection against damage caused by fungi and bacteria, in particular to impregnation of wooden crossties and rods. Antiseptic of invention contains, as long fraction of thermal cracking, fraction of heavy pyrolysis tar boiling off within a range of 200°C to end boiling point in amount 70-95 wt % and, as color regulator, mazut fraction boiling off within a range of 220°C to end boiling point in amount 5-30 wt %.

EFFECT: expanded reserve of oily wood-impregnation antiseptics and improved color thereof thanks to optimal proportions of distillate and residual petroleum fractions.

3 ex

The invention relates to compositions of antiseptics oil for impregnation of wood and can be used for impregnation of sleepers and rails

The invention relates to the manufacture of composite antifriction materials based on pressure-treated wood fillers and anti-friction

FIELD: impregnation of wood.

SUBSTANCE: the suggested wood should be obtained due to impregnating wood with the mixture based upon polymerized monomer of furfuryl alcohol that contains, at least, water, furfuryl alcohol, a stabilizing additional solvent chosen out of acetone or alcohol at low boiling point such as methanol, ethanol or isopropanol and their combinations, and an initiator chosen out of maleic anhydride, phthalic anhydride, maleic acid, malic acid, phthalic acid, benzoic acid, citric acid, zinc chloride, aluminum chloride, other cyclic organic anhydrides and acids and their combinations. It has been, also, described the method for obtaining the wood impregnated with furan polymer due to a single-stage impregnation of wood with the mixture based upon polymerized monomer of furfuryl alcohol followed by hardening stage. The suggested wood is of high stability of sizes under conditions of altering moisture and increased resistance to rotting.

EFFECT: higher efficiency.

8 cl, 5 tbl

FIELD: wood-working industry.

SUBSTANCE: described is the wood impregnated with furan polymer obtained by impregnation of wood with solution of polymerized monomer of furfural alcohol containing water, stabilizers in the form of borax and sodium salts of lignosulfone acids, furfural alcohol and at least one additional compound selected from maleic anhydride, phthalic anhydride, maleic acid, phthalic acid and their combinations. Described also is the method of wood treatment by single-stage impregnation with a solution of polymerized monomer of furfural alcohol, subsequent hardening at a temperature of 70-140C providing drying in an oven.

EFFECT: enhanced stability of dimensions in the conditions of varying moisture content, enhanced hardness and resistance to putrefaction.

11 cl, 5 tbl

FIELD: building materials industry; production and application of the furan polymeric compound permeated timber-based materials.

SUBSTANCE: the invention is pertaining to the field of building materials industry, mainly, to production and application of the furan polymeric compound permeated timber-based materials. The

offered timber-based material is permeated with the solution of the polymerized monomer of the furfural alcohol consisting of the furfuryl alcohol and one additional compound dissolved directly in the indicated furfuryl alcohol to produce the treating solution. At that the indicated additional compound is chosen from the maleic anhydride and the phthalic anhydride. The invention also presents the method of production of the timber-based material permeated with the furan polymeric compound and the way of its application. The technical result of the invention ensures, that the timber-based material permeated with the furan polymeric compound is homogeneous in color and density in the whole treated zone.

EFFECT: the invention ensures, that the produced timber-based material permeated with the furan polymeric compound is homogeneous in color and density in the whole treated zone.

8 cl, 1 tbl, 1 ex

Wood // 2240690

FIELD: impregnation of wood.

SUBSTANCE: the suggested wood should be obtained due to impregnating wood with the mixture based upon polymerized monomer of furfuryl alcohol that contains, at least, water, furfuryl alcohol, a stabilizing additional solvent chosen out of acetone or alcohol at low boiling point such as methanol, ethanol or isopropanol and their combinations, and an initiator chosen out of maleic anhydride, phthalic anhydride, maleic acid, malic acid, phthalic acid, benzoic acid, citric acid, zinc chloride, aluminum chloride, other cyclic organic anhydrides and acids and their combinations. It has been, also, described the method for obtaining the wood impregnated with furan polymer due to a single-stage impregnation of wood with the mixture based upon polymerized monomer of furfuryl alcohol followed by hardening stage. The suggested wood is of high stability of sizes under conditions of altering moisture and increased resistance to rotting.

EFFECT: higher efficiency.

8 cl, 5 tbl

FIELD: wood-working industry.

SUBSTANCE: described is the wood impregnated with furan polymer obtained by impregnation of wood with solution of polymerized monomer of furfural alcohol containing water, stabilizers in the form of borax and sodium salts of lignosulfone acids, furfural alcohol and at least one additional compound selected from maleic anhydride, phthalic anhydride, maleic acid, phthalic acid and their combinations. Described also is the method of wood treatment by single-stage impregnation with a solution of polymerized monomer of furfural alcohol, subsequent hardening at a temperature of 70-140C providing drying in an oven.

EFFECT: enhanced stability of dimensions in the conditions of varying moisture content, enhanced hardness and resistance to putrefaction.

11 cl, 5 tbl

FIELD: building materials industry; production and application of the furan polymeric compound permeated timber-based materials.

SUBSTANCE: the invention is pertaining to the field of building materials industry, mainly, to production and application of the furan polymeric compound permeated timber-based materials. The

offered timber-based material is permeated with the solution of the polymerized monomer of the furfural alcohol consisting of the furfuryl alcohol and one additional compound dissolved directly in the indicated furfuryl alcohol to produce the treating solution. At that the indicated additional compound is chosen from the maleic anhydride and the phthalic anhydride. The invention also presents the method of production of the timber-based material permeated with the furan polymeric compound and the way of its application. The technical result of the invention ensures, that the timber-based material permeated with the furan polymeric compound is homogeneous in color and density in the whole treated zone.

EFFECT: the invention ensures, that the produced timber-based material permeated with the furan polymeric compound is homogeneous in color and density in the whole treated zone.

8 cl, 1 tbl, 1 ex

The invention relates to a method of treatment of wood going into production Dec strings and stringed musical instruments (upper and lower decks of the hull violin, viola, guitar, etc), to improve the acoustic properties of the wood blanks

FIELD: building materials industry; production and application of the furan polymeric compound permeated timber-based materials.

SUBSTANCE: the invention is pertaining to the field of building materials industry, mainly, to production and application of the furan polymeric compound permeated timber-based materials. The

offered timber-based material is permeated with the solution of the polymerized monomer of the furfural alcohol consisting of the furfuryl alcohol and one additional compound dissolved directly in the indicated furfuryl alcohol to produce the treating solution. At that the indicated additional compound is chosen from the maleic anhydride and the phthalic anhydride. The invention also presents the method of production of the timber-based material permeated with the furan polymeric compound and the way of its application. The technical result of the invention ensures, that the timber-based material permeated with the furan polymeric compound is homogeneous in color and density in the whole treated zone.

EFFECT: the invention ensures, that the produced timber-based material permeated with the furan polymeric compound is homogeneous in color and density in the whole treated zone.

8 cl, 1 tbl, 1 ex

FIELD: wood-working industry.

SUBSTANCE: described is the wood impregnated with furan polymer obtained by impregnation of wood with solution of polymerized monomer of furfural alcohol containing water, stabilizers in the form of borax and sodium salts of lignosulfone acids, furfural alcohol and at least one additional compound selected from maleic anhydride, phthalic anhydride, maleic acid, phthalic acid and their combinations. Described also is the method of wood treatment by single-stage impregnation with a solution of polymerized monomer of furfural alcohol, subsequent hardening at a temperature of 70-140C providing drying in an oven.

EFFECT: enhanced stability of dimensions in the conditions of varying moisture content, enhanced hardness and resistance to putrefaction.

11 cl, 5 tbl

FIELD: impregnation of wood.

SUBSTANCE: the suggested wood should be obtained due to impregnating wood with the mixture based upon polymerized monomer of furfuryl alcohol that contains, at least, water, furfuryl alcohol, a stabilizing additional solvent chosen out of acetone or alcohol at low boiling point such as methanol, ethanol or isopropanol and their combinations, and an initiator chosen out of maleic anhydride, phthalic anhydride, maleic acid, malic acid, phthalic acid, benzoic acid, citric acid, zinc chloride, aluminum chloride, other cyclic organic anhydrides and acids and their combinations. It has been, also, described the method for obtaining the wood impregnated with furan polymer due to a single-stage impregnation of wood with the mixture based upon polymerized monomer of furfuryl alcohol followed by hardening stage. The suggested wood is of high stability of sizes under conditions of altering moisture and increased resistance to rotting.

EFFECT: higher efficiency.

8 cl, 5 tbl

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