Method for increase of durability, stability of size and hardness of wood products surface

FIELD: construction.

SUBSTANCE: method for manufacture of wood products with increased durability, stability of size and hardness of surface, which consists in the fact that non-treated wood product is impregnated with aqueous solution A) of impregnating substance selected from group that includes 1,3-bis(hydroxymethyl)-4,5-dihydroxyimidazolidinone-2, modified with C1-5-alcohol, polyol or their mixtures 1,3-bis(hydroxymethyl)-4,5-dihydroxyimidazolidinone-2, 1,3-dimethyl-4,5-dihydroxyimidazolidinone-2, dimethyl urea, bis(methoxymethyl)urea, tetramethylol-acetylene diurea, 1,3-bis(hydroxymethyl)imidazolidinone-2, methylolmethylurea or their mixtures, and B) catalyst selected from group including salts of metals or ammonia, organic or inorganic acids and their mixtures, and afterwards wood product is exposed to hardening at the temperature of 70-130C and relative air humidity from 40 to 100%.

EFFECT: exclusion of crooking and cracking of wood product.

17 cl, 4 tbl, 4 ex

 

The invention relates to a method for producing a wood product with high durability, dimensional stability and surface hardness, wherein the raw wood product impregnated with an aqueous solution:

A) impregnating a means selected from the group comprising 1,3-bis(hydroxymethyl)-4,5-dihydroxyindoline-2, a modified C1-5-alcohol, a polyol or mixtures thereof 1,3-bis(hydroxymethyl)-4,5-dihydroxyindoline-2, 1,3-dimethyl-4,5-dihydroxyindoline-2, dimethylamino, bis(methoxymethyl)urea, tetramethylethylenediamine, 1,3-bis(hydroxymethyl)imidazolidine-2, methylolacrylamide or mixtures thereof, and

B) a catalyst selected from the group comprising metal salts or ammonium, organic or inorganic acids or mixtures thereof,

and after that, while maintaining wet conditions utverjdayut at elevated temperature.

In particular, the invention relates to wood products of larger dimensions. Under wood products are understood in this molded product made of solid wood. Wood products and impregnating means is formed of a composite material in which the positive properties of natural wood material, in particular aesthetic appearance, remain the same, but one or several physical and biological properties of Zn is significantly improved.

From the publication "Treatment of timber with water soluble dimethylol resins to improve the dimensional stability and durability," published in Wood Science and Technology 1993, str-355, to improve the properties of the shrinkage and swelling of wood, as well as resistance against fungi and insects known wood impregnating agent, which consists of an aqueous solution of dimethylhydroxylamine (DMDHEU or 1,3-bis(hydroxymethyl)-4,5-dihydroxyindoline-2) and catalyst. As the catalyst used metal salts, citric acid and amine salts separately or in combination. DMDHEU is applied in aqueous solution with a concentration of from 5% to 20%. Added to it a quantity of the catalyst was 20% in terms of DMDHEU. The impregnation is carried out in vacuum. At elevated temperatures the reaction DMDHEU with itself and with wood. This reaction occurs within one hour in a drying oven at a temperature of 80C or 100C. the thus Treated samples of wood have improved properties, shrinkage and swelling up to 75%, namely, when the concentration of DMDHEU 20%. Thus, were investigated wood products with dimensions of 20 mm 20 mm 10 mm, the Described method can be used only for small sizes of wood products, as treated wood when larger sizes are prone to cracking.

From the author of W.D.Ellis, J.L.O'Dell "Wood-Plymer Composites Made with Acrylic Monomers, Isocyanate, and Maleic Anhydride", published in the journal of Applied Polymer Science, Vol.73, str-2505 (1999) known processing of natural wood with a mixture of acrylate, isocyanate and maleic anhydride in a vacuum. Used substances react with each other, but not with wood. Such impregnation increases the density, hardness and resistance to water vapor diffusion. Improve and also water-repellent property and the dimensional stability of wood.

From EP-0891244 known impregnation of wood products solid wood biodegradable polymer, a natural resin and/or a complex ester of the fatty acid series, if necessary, with the application of vacuum and/or pressure. Impregnation takes place at elevated temperature. While the pores in the wood are essentially filled and formed molded product that contains wood and biodegradable polymer. The reaction of the polymer with wood is not designated. When such processing is not lost characteristic of wood properties, the ability to biological decomposition and mechanical properties. Cut-through may increase. Depending on the entered amount of polymer increases the surface hardness due to the inclusion of a polymer in a matrix of wood, so soft by nature wood Ave is suitable for floors with high quality.

From SE-C 500039 known method of curing (hardening) of wood under seal, in which the raw wood is saturated with different aminoplast monomers based on melamine and formaldehyde by impregnation under pressure in the vacuum, then dried and in the press seal at elevated temperature cures. As the hardener should be called, among other things, DMDHEU, dimethylamino, dimethoxymethylsilane, dimethyldodecylamine, dimethylpropyleneurea and dimethoxymethane.

This method has the disadvantage associated with a high energy stage drying. In addition, the natural structure of the wood is lost due to compression.

The objective of the invention is to develop a method of improving the durability, dimensional stability and surface hardness of a wood product and also with the larger sizes, which does not have the disadvantages of the known prior art, in particular does not lead to cracking of wood, and provides wood, which retains its natural structure.

The objective of the invention is solved in the aforementioned manner. The resulting wood products suitable for various applications where the wood is exposed to moisture and atmospheric condition the conditions, in particular, when used as window frames, cladding boards or stair treads.

With the method according to the present invention it is about improving many properties of wood products with larger dimensions, for example with a width of from 30 to 200 mm and a thickness of from 30 to 100 mm When the impregnation of raw wood impregnating agent (A) and, if necessary, (C) and subsequent curing method according to the invention in an unexpected way were not cracking, namely, also in larger sizes of wood products. Such impregnation, followed by curing simultaneously increases the durability, dimensional stability and surface hardness of a wood product.

As impregnating products And for wood products suitable 1,3-bis(hydroxymethyl)-4,5-dihydroxyindoline-2, a modified C1-5-alcohol, a polyol or mixtures thereof 1,3-bis(hydroxymethyl)-4,5-dihydroxyindoline-2, 1,3-dimethyl-4,5-dihydroxyindoline-2, dimethylamine, bis(methoxymethyl)urea, tetramethylethylenediamine, 1,3-bis(hydroxymethyl)imidazolidine-2, methylolacrylamide or mixtures thereof.

Particularly suitable 1,3-bis(hydroxymethyl)-4,5-dihydroxyindoline-2 or a modified C1-5-alcohol, a polyol or mixtures thereof 1,3-bis(hydroxymethyl)-4,5-dihydroxy is iasolution-2 or mixtures thereof.

Particularly preferably suitable as impregnating means (A) a modified C1-5-alcohol, a polyol or mixtures thereof 1,3-bis(hydroxymethyl)-4,5-dihydroxyindoline-2.

Modified 1,3-bis(hydroxymethyl)-4,5-dihydroxyindoline-2 (mDMDHEU) is known, e.g. from US 4396391 and WO 98/29393. When it comes to the product of the interaction of 1,3-bis(hydroxymethyl)-4,5-dihydroxyindoline-2 with C1-5-alcohol, a polyol or mixtures thereof.

Suitable C1-5-alcohols are, for example, methanol, ethanol, n-propanol, ISO-propanol, n-butanol and n-pentanol, preferably methanol. Suitable polyols are, for example, ethylene glycol, dietilen glycol, 1,2 - and 1,3-propylene glycol, 1,2-, 1,3-, and 1,4-butyleneglycol, glycerin and glycols of the formula(CH2CH2O)nN, where n has a value from 3 to 20, preferably diethylene glycol.

To obtain derivatives of 1,3-bis(hydroxymethyl)-4,5-dihydroxyindoline-2 (mDMDHEU) mixed DMDHEU and monohydroxy alcohol and/or polyol, and monohydroxy alcohol and/or polyol is used in each number from 0.1 to 2.0 molar equivalents in terms of DMDHEU. The mixture of DMDHEU, monohydroxy alcohol and/or polyol is subjected to interaction at a temperature of from 20 to 70C and a pH value of from 1 to 2.5, and the pH value after the reaction of interaction were installed on the inu from 4 to 8.

Suitable impregnating means (C) are C1-5-alcohols, polyols or mixtures thereof, as, for example, methanol, ethanol, n-propanol, ISO-propanol, n-butanol, n-pentanol, ethylene glycol, diethylene glycol, 1,2 - and 1,3-propylene glycol, 1,2-, 1,3-, and 1,4-butyleneglycol, glycerin, glycols of the formula O(CH2CH2O)nN, where n has a value from 3 to 20, or mixtures thereof.

The preferred methanol, diethylene glycol, or mixtures thereof.

Impregnating means (A) and, if necessary, apply in a concentration of from 1 to 60 wt.%, preferably from 10 to 40 wt.%, in terms of aqueous solution impregnating products.

If it is also used in the treatment tool), preferably from 1 to 50 wt.%, in terms of the treatment tool (A).

Suitable catalysts are metal salts from the group comprising halides of metals, sulfates of metals, nitrates metals, tetrafluoroborate metals, phosphates, metals, or mixtures thereof. Examples are magnesium chloride, magnesium sulfate, zinc chloride, lithium chloride, lithium bromide, boron TRIFLUORIDE, aluminum chloride, aluminum sulfate, zinc nitrate, tetrafluoroborate sodium or mixtures thereof.

Suitable catalysts C) are also ammonium salt from the group including ammonium chloride, ammonium sulfate, ammonium oxalate, diammonium phosphate, or a mixture thereof.

Other suitable cat is the catalysts C) are organic or inorganic acid. Suitable examples are maleic acid, formic acid, citric acid, tartaric acid, oxalic acid, p-toluensulfonate, hydrochloric acid, sulfuric acid, boric acid and mixtures thereof.

Preferably apply magnesium chloride, zinc chloride, magnesium sulfate, aluminum sulfate.

Particularly preferred magnesium chloride.

With the method according to the present invention, the impregnation can be carried out under vacuum followed by pressure. While wood products are in impregnating install the vacuum from 10 to 100 mbar in the time interval from 10 minutes to 2 hours, preferably about 30 minutes, depending on the sizes of wood products, and after that poured impregnating agent. Preferred was the use of vacuum 50 mbar for one hour. Alternative wood product may first be poured impregnating agent in the impregnation installation and then subjected to a vacuum of 10 to 100 mbar in the above time interval.

Then applied pressure with values from 2 to 20 bar, preferably from 10 to 12 bar, depending on the sizes of wood products in the time interval from 10 minutes to 2 hours, preferably for about one hour. The way impact the Oia pressure in the vacuum especially makes sense due to the high weight fractions of impregnating products.

After the exposure phase the pressure is removed the residual liquid and impregnated wood product cures without intermediate drying. Of particular importance is the preservation of wet conditions during curing impregnating means, so that drying during this reaction is abolished. Thus introduced into the wood impregnating agent in wet conditions and the avoidance of drying is to react with itself and with the wood. Wet conditions mean in this connection, the water content in the wood above the saturation point of the fibers, which can be up to approximately 30% of the water in the wood, depending on the type of wood. The wood can impregnation to absorb up to 20% aqueous impregnating products.

To ensure wet conditions during curing of the impregnated wood product is to be stored in a controlled humidity air temperature and pressure of the drying chamber and fixed in such a way as to resist warping from cracking. At a relative humidity of from 40 to 100%, preferably from 50 to 100%, particularly preferably from 80 to 100%, and a temperature of from 70 to 130C., preferably from 80 to 100C., the impregnated wood product cures in a time period of 1 to 72 hours, preferably from 1 to 48 hours, depending on the sizes of wood products, and impregnating cf the rotary A) and if necessary, (C) reacts with the wood and with himself.

Compliance with a relative humidity of more than 40%, preferably more than 50% and particularly preferably more than 80 and up to 100%, is used to prevent the drying of wood products during the curing below the saturation point of the fibers.

The specialist in this area before curing in any case would produce drying the impregnated wood product, because otherwise he would have expected it cracking. Unexpected with the proposed method is thus that the wood product and also without pre-drying is not prone to cracking. In particular, this applies to wood products with larger dimensions, for example with a width of from 30 to 200 mm and a thickness of from 30 to 100 mm

After curing wood products are dried, with suitable means to prevent warping from cracking and measured physical data.

Application example 1

Make the window slats of wood Pinus radiata, i.e. the profile of the molded product, which can be used for the manufacture of window frames.

Modified with diethylene glycol and methanol dimethylhydroxylamine DMDHEU (modified dimethylhydroxylamine, mDMDHEU) diluted with water to 30 wt.% and mixed with 1.5% MgCl2 6 H2 O. Dried to 12% moisture content wood product is placed in an impregnating the installation. Impregnating the installation is exposed to the vacuum of 40 mbar abs. within 30 minutes. Then impregnating the installation pour impregnating agent. Vacuum 50 mbar abs. keep constant. After that put pressure 10 bar for 2 hours. Phase pressure end and remove residual liquid. Then wood products are stored in controlled temperature and humidity of the drying chamber and is fixed so that it was not possible warping from cracking. The camera is brought to a temperature of 95C and a relative humidity of approximately 95%. These wet conditions hold as much time up to 48 hours until the inside wood products will not be achieved temperature of at least 90C.

Subsequent drying of wood products is carried out in a well-ventilated stack. After that Reiki is subjected to subsequent processing.

Swelling and shrinkage of the treated rails.

Thus treated Reiki differ greatly reduced swelling and shrinking with changes in humidity (dimensional stability) relative to untreated rails.

Table 1
In the D. wood Swelling at a humidity of from 0% to 96%Relative improvement
Untreated pine sapwood13,6%
Treated pine sapwood7,5%45%

The advantage of this treatment when used in the manufacture of Windows is that it avoids the formation of open seams, which are formed due to swelling and shrinkage and lead to the destruction of Windows, and increases the service life of wooden Windows.

Additionally, the wood is protected from abiotic decomposition due to ultraviolet rays and/or rainwater. It was investigated on pine Obolon at atmospheric weathering. Results after one year give the following picture.

Raw before weathering:

It is clear that the above treatment resulted in a significant improvement in resistance to atmospheric conditions. Thus, there is a significantly reduced cracking, clearly reduced the appearance of gray wood and greatly reduced wear on the wood surface.

Application example 2

Here handle all piles from the dreams, to them it was possible to erect a palisade.

DMDHEU is diluted with water to about 15 wt.% and mixed with 0.75 percent ZnNO3 6 H2O. Dried to approximately 20% moisture round wood products are approximately the same size are placed in an impregnating the installation. This impregnating installation pour impregnating agent and within 30 minutes exposed to vacuum at 40 mbar abs. Then put pressure 10 bar for 2 hours. Phase pressure end and remove residual liquid.

Wood products are stored in controlled temperature and humidity of the drying chamber and is fixed so that it was not possible warping from cracking. The camera is brought to a temperature of 98C and a relative humidity of approximately 80%. These wet conditions retain as much time up to 30 hours until the inside wood products will not be achieved temperature of at least 95C.

Subsequent drying of wood products is carried out in a well-ventilated stack.

The durability of the treated samples.

For the longevity of the Palisades is very important resistance against rotten rot (soil contact). Especially important upcoming loss of strength, such as loss of E-modulus (modulus of elasticity).

Table 2
WoodE-module at the beginning of the testE-module through 32 weeksLoss of E-moduleWeight loss
Raw8309 n/mm24096 n/mm251%18%
Processed8419 n/mm28272 n/mm22%2%

This test was conducted according to European standards ENv807. The samples were subjected to decomposition when in contact with soil when optimized for organisms conditions.

Application example 3

Handle boards from rubber tree to make of them garden furniture and garden decking.

Modified with diethylene glycol and methanol DMDHEU (mDMDHEU) dilute with water to 40 wt.% and mixed with 2 wt.% Al2(SO4)316 N2O. Dried to approximately 12% moisture content of the boards are placed in an impregnating the installation. This impregnating installation pour impregnating agent and within 1 hour exposed to vacuum at 40 mbar obszarem put pressure 10 bar for 2 hours. Phase pressure end and remove residual liquid.

Molded product is heated in a saturated water vapor atmosphere to approximately 90C. This is achieved by packaging wood products in the film, which remains stable at this temperature. The duration of exposure to temperature depends on the type of wood and size of wood products. When wood products with thickness from 3 to 6 cm, the reaction time was approximately 48 hours.

Wood products fixed after the reaction in the stack so that it was not possible warping from cracking. Followed by a drying process at a temperature of approximately 50C and a duration of 14 days. For this you can use a regular oven.

The durability of the thus treated wood products.

Garden accessories from wood furniture or flooring), which is not subject to contact with soil, susceptible to decay caused by certain fungi and abiotic weathering. Examine the decomposition against wood destroying fungi in comparison with the European standard EN 113:

Table 3
WoodWeight loss after 8 weeks
Nobr botany 34%
Processed1%

Application example 4

Make stairs out of solid wood, such as beech. These stages have a size of 1000 mm 400 mm 80 mm Special importance is attached to high surface hardness stair foot.

DMDHEU is diluted with water in a conventional aqueous solution of 60 wt.% and mixed with 1.5 wt.% MgCl2 6 H2O. Dried to approximately 12% moisture stairs with approximately the same size are placed in an impregnating the installation, which is poured impregnating agent. In impregnating installation within 1 hour install a vacuum of 40 mbar abs. Then impregnating the installation is subjected to a pressure of 10 bar for 2 hours. Phase application of pressure to finish and remove residual liquid. Stairs are heated in a saturated water atmosphere to about 95C. the Duration of exposure to temperature depended on the type of wood and size of steps. When speed with a thickness of 80 mm, the reaction time was approximately 60 hours.

After the reaction wood is fixed in the stack so that it was not possible warping from cracking. Followed by a drying process at a temperature of approximately 50C and a duration of 14 days To do this, apply the usual drying chamber.

The hardness of the surface thus treated wood samples.

The surface hardness of the wood samples are determined by the method of Brinell according to European standards EN 1534.

Table 4
WoodThe Brinell hardnessThe increase in hardness
Raw35 n/mm2
Processed112 n/mm2220%

1. A method of obtaining a wood product with high durability, dimensional stability and surface hardness, namely, that the raw wood product impregnated with an aqueous solution
A) impregnating a means selected from the group comprising 1,3-bis(hydroxymethyl)-4,5-dihydroxyindoline-2, a modified C1-5-alcohol, a polyol or mixtures thereof 1,3-bis(hydroxymethyl)-4,5-dihydroxyindoline-2, 1,3-dimethyl-4,5-dihydroxyindoline-2, dimethylamino, bis(methoxymethyl)urea, tetramethylol-acetylanthracene, 1,3-bis(hydroxymethyl)imidazolidine-2, methylolacrylamide or mixtures thereof, and
B) the cat who lyst selected from the group comprising metal salts or ammonium, organic or inorganic acids or mixtures thereof, and after that the wood product is subjected to curing at a temperature of 70-130C. and a relative humidity of from 40 to 100%.

2. The method according to claim 1, characterized in that as an impregnating means apply 1,3-bis(hydroxymethyl)-4,5-dihydroxyindoline-2, a modified C1-5-alcohol, a polyol or mixtures thereof 1,3-bis(hydroxymethyl)-4,5-dihydroxyindoline-2 or mixtures thereof.

3. The method according to claim 1 or 2, characterized in that as an impregnating means apply a modified C1-5-alcohol, a polyol or mixtures thereof 1,3-bis(hydroxymethyl)-4,5-dihydroxyindoline-2.

4. The method according to claim 1 or 2, characterized in that it further apply the impregnating agent (C)selected from the group comprising From1-5-alcohol, a polyol or mixtures thereof.

5. The method according to claim 4, characterized in that additionally use methanol, ethanol, n-propanol, ISO-propanol, n-butanol, n-pentanol, ethylene glycol, diethylene glycol, 1,2 - and 1,3-propylene glycol, 1,2-, 1,3-, and 1,4-butyleneglycol, glycerin, glycols of the formula(CH2CH2O)nN, where n has a value from 3 to 20, or mixtures thereof.

6. The method according to claim 5, characterized in that additionally use methanol, diethylene glycol, or mixtures thereof.

7. With whom persons according to claim 1 or 2, characterized in that the impregnating agent (A) and optionally (C) used at a concentration of from 1 to 60 wt.% in aqueous solution.

8. The method according to claim 1 or 2, characterized in that as a catalyst) used metal salts selected from the group comprising halides of metals, sulfates of metals, nitrates metals, tetrafluoroborate metals, phosphates, metals, or mixtures thereof.

9. The method of claim 8, wherein as catalyst) used metal salts from the group including magnesium chloride, magnesium sulfate, zinc chloride, lithium chloride, lithium bromide, boron TRIFLUORIDE, aluminum chloride, aluminum sulfate, zinc nitrate, tetrafluoroborate sodium or mixtures thereof.

10. The method according to claim 1 or 2, characterized in that as a catalyst) used ammonium salt from the group including ammonium chloride, ammonium sulfate, ammonium oxalate, diammonium phosphate, or a mixture thereof.

11. The method according to claim 1 or 2, characterized in that as a catalyst) to apply an organic or inorganic acid of the group comprising maleic acid, formic acid, citric acid, tartaric acid, oxalic acid, p-toluensulfonate, hydrochloric acid, sulfuric acid, boric acid or mixtures thereof.

12. The method according to claim 1 or 2, characterized in that as a catalyst) used magnesium chloride.

13. The method according to claim 1 or 2, distinguished by the different topics the catalyst used in concentrations of from 0.1 to 10 wt.%, in terms of the number of treatment means (A) and optionally (C).

14. The method according to claim 1 or 2, characterized in that the impregnated wood product is subjected to curing at a relative humidity of from 50%to 100%.

15. The method according to 14, characterized in that the impregnated wood product is subjected to curing at a relative humidity of 80 to 100%.

16. The method according to claim 1 or 2, characterized in that the impregnated wood product is subjected to curing in the period of time from 1 to 72 hours

17. The method according to claim 1 or 2, characterized in that the wood product is fixed after impregnation so that counteract the change in the shape of a wood product during curing.



 

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5 cl, 2 tbl, 3 ex

FIELD: process for reducing of wood destruction rate by synthesizing and using non-toxic aqueous composition favorable for environment.

SUBSTANCE: method involves bringing wood into contact with aqueous alkaline colloid composition containing electrostatically charged particles of colloid-colloid silicon oxide comprising barium ions included therein, said contacting occurring under environmental temperature and pressure conditions or under elevated temperature and increased pressure conditions. Composition contains water, hydroxide of alkaline metal in an amount sufficient for bringing of water pH value to 10, silicon-containing salt, boron-containing salt, electrostatically charged particles of colloid silicon oxide, said particles containing boron ions included therein, and, optionally, aluminum halogenide and preservative. Composition is obtained by mixing components thereof. Method is provided under conditions causing production of oversaturated solution of boron-containing salt. Method allows quality of wood to be improved.

EFFECT: improved preservation of wood by increasing resistance thereof to insect, decay, ultraviolet damages, fires and other environmental effects.

43 cl, 7 dwg, 12 ex

FIELD: methods for production of fire-retardants for fireproofing treatment of wood materials, applicable in production of fireproof laminated products.

SUBSTANCE: the method is accomplished by interaction of carbamide-formaldehyde concentrate of the following composition, percent by mass: carbamide-21-25; formaldehyde - 54-60; water - the rest with ammonia liquor taken in equimolar relation in formaldehyde and ammonia, at heating in a weak-alkaline medium in the presence of amino alcohol added together with ammonia liquor (0.01-0.2 percent by mass) taking into consideration the carbamide-formaldehyde concentrate with a subsequent introduction of the first portion of carbamide (0.1-10 percent by mass) for 100 percent by mass of carbamide-formaldehyde concentrate, cooling, neutralization of the reaction mixture by ortho-phosphoric acid up to pH=6.0-8.0 and subsequent introduction of the second portion of carbamide (0.1-20 percent by mass), nonionogenic surface-active agent (0.01-0.1 percent by mass), potassium bichromate (0.1-1.5 percent by mass) for 100 percent by mass of carbamide-formaldehyde concentrate.

EFFECT: optimized conditions of synthesis of fire-retardants with preservation of their fireproofing efficiency at a high level.

2 ex, 1 tbl

FIELD: chemical industry, applicable for treatment of wood products such as piles, supports of communication and power transmission lines, fences, posts, sleepers, bridge deck, etc.

SUBSTANCE: anticeptic for wood is obtained on the basis of sovtol, sovtol is processed to paste with simultaneous decontamination of it by successive treatment by reagents - oleum and triethanolamine - at a molar relation of sovtol to reagents of 1:2:3, respectively, before treatment sovtol is heated at agitation to a temperature of 80 to 150C, in the process of treatment of sovtol by oleum heating to a temperature of 180 to 250C is accomplished at agitation during 12 to 14 hours and subsequent cooling down to 70 to 100C, after that treatment by triethanolamine is accomplished up to the completion of the process of neutralization. The obtained paste is used in the form of at least 5-% aqueous solution.

EFFECT: simplified procedure of production of antiseptic compound with provision of safety of the environment.

1 tbl

FIELD: organic chemistry, chemical technology.

SUBSTANCE: invention relates to methods for synthesis of antipyrenes used in fireproofing wood materials. Method for synthesis of antipyrenes is carried out by mixing two components one of that - amidophosphate is synthesized by interaction of carbamidoformaldehyde concentrate comprising, wt.-%: carbamide, 21-25; formaldehyde, 54-60, and water, the balance, with ammonia water taken in equimolar ratio with respect to formaldehyde and ammonia, at heating in weakly alkaline medium, in the presence of aminoalcohol chosen from the group comprising monoethanolamine, diethanolamine, triethanolamine, amine modifying agent AM-1 adding in common with ammonia water in the amount 0.01-0.3 wt.-% as measured for carbamidoformaldehyde concentrate followed by addition of 1-10 wt.-% of carbamide as measured for 100 wt.-% of carbamidoformaldehyde concentrate, cooling and neutralization of the reaction mixture with ortho-phosphoric acid to pH 6.0-8.0, and the second component - an aqueous dispersion of acrylic or vinyl acetate polymers. Invention provides optimization conditions for synthesis of antipyrenes with simultaneous retention of their high effectiveness after contact of water with wood.

EFFECT: improved method of synthesis.

1 tbl, 6 ex

FIELD: production of antipyrines, applicable in wood-working industry, as well as in building at carrying-out of preventive maintenance measures in fireproofing of products made of dry wood.

SUBSTANCE: the method consists in mixing of alumochromophosphate, non-ionogenic surface-active agent and polyamine, preliminarily neutralized by ortho-phosphoric acid to pH 6.0-8.0, used as polyamine is the aqueous solution of a product of general formula: , where: n=0.1 and m=0.1 at the following mass relation of components: alumochromophosphate: non-ionogenic surface-active agent: polyamine equal to (20-90):(0.01-0.5):(10-80).

EFFECT: produced wood materials of the first group of fireproofing efficiency at reduced consumption of antipyrine.

4 ex, 1 tbl

FIELD: methods of production of antipyrines for fireproof treatment of wood materials.

SUBSTANCE: proposed method includes interaction of carbamide formaldehyde concentrate of the following composition, mass-%: carbamide, 21-25; formaldehyde, 54-60; the remainder being water with ammonia water taken at equimolar ratio by formaldehyde and ammonia at heating in weak-alkaline medium in presence of aminoalcohol selected from group containing mono-ethanol amine, di-ethanol amine, tri-ethanol amine and amine modifying agent AM-1 added together with ammonia water in the amount of 0.01-0.3 mass-% in terms of carbamide formaldehyde concentrate followed by introduction of carbamide in the amount of 1-10 mass-% per 100 mass-% of carbamide formaldehyde concentrate; then, reaction mixture is cooled and neutralized with ortho-phosphoric acid to pH= 6.0-8.0.

EFFECT: optimization of synthesis process of antipyrines at retained fire resistance efficiency.

1 tbl, 2 ex

FIELD: construction.

SUBSTANCE: method for impregnation of wood or material on wood basis includes the following stages: a. previous heating of working solution to temperature that exceeds boiling temperature at atmospheric pressure, that is ultrahigh temperature of working solution, and maintenance of sufficient pressure during the whole stage of previous heating for provision of working solution preservation in the form of liquid phase, b. provision of initial preliminary pressure to wood or material on wood basis prior to their introduction in contact with working solution at ultrahigh temperature sufficient for preservation of working solution in the form of liquid phase, c. introduction of wood or material on wood basis in contact with working solution at ultrahigh temperature and at higher pressure, at which working solution is preserved in the form of liquid phase, for stimulation of wood or wood-based material impregnation by solution on liquid base, and assistance in impregnation of wood or material on wood basis with working solution as a result of application of additional hydraulic or pneumatic pressure, d. separation of wood or wood-based material and residual working solution, material of wastes and/or side products, that is pressure bleeding after impregnation for separation of residual working solution, material of wastes and side products of return known as return related to pressure variation. Also versions are described for impregnation of wood or wood-based materials.

EFFECT: sufficient value of wood filling with treatment solution during shorter period of time.

29 cl, 4 dwg, 11 tbl

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