The method of impregnation of wood and ognezashhitnye structures for its implementation

 

(57) Abstract:

The invention relates to a method for onebusaway compositions for wood and egabiosafety composition, which can be used in the construction of country houses, furniture and other industries. The method of impregnation of wood is consistent impregnation of wooden structures at a temperature of 10-60oWith two aqueous solutions, representing ognezashhitnye compositions for primary and secondary (secondary) treatment. The solution for the initial impregnation contains inorganic salts, possessing fire - and bio-protective properties: ammonium dihydrophosphate, as magnesium sulfate, borax, surface-active substance (surfactant) and water in the following ratios, wt.%: ammonium dihydrophosphate 11,0-12,0, as magnesium sulfate 23,0-25,0, borax 5,0-6,0, surfactant 1.0 to 1.5, water 55,0-60,0. The solution to the second (secondary) impregnation 18,0-21,0% aqueous solution of calcium chloride. 3 c.p. f-crystals, 1 table.

The invention relates to a method for onebusaway compositions for wood and egabiosafety composition, which can be used in the construction of country houses, in the manufacture of furniture and others about oral sodium in wt.%, accordingly: 1-15, 1-5,2, water the rest of the OST 13-135-82. Means for protective wood. solutions biomagnetometer drugs FBS and BS-13. The technical requirements. Min. forestry and pulp and paper industry of the USSR.

The disadvantages of these compositions is the high toxicity caused by the use of sodium fluoride, and low humidity.

Known onebusaway composition "MS", providing group II the effectiveness of fire protection according to GOST 16363-98. Ways and means of fire protection of wood. The leadership. Min. EXT. Affairs of the Russian Federation. The Institute of fire prevention. M., 1999

The composition contains the following components, wt.%: the 20 DAP, ammonium sulfate 5 sodium fluoride 3, sulfinol 1-1,5, water the rest. Composition (2) has the same drawbacks as the compounds (1).

More moisture resistant compositions are based on agribiotechnology drug "CBE", providing a mixture of pentahlorfenolyata sodium boric acid and soda ash in mass parts, respectively: 1-2: 1-5: 1-5. GOST 23787.12-81. Means for protective wood. Solutions biomagnetometer drug CBE. The disadvantage of this drug is high toxicity, inability to use in rainy weather.

The composition must be used no later than 36 hours after cooking. The composition unsuitable for impregnation of wood, but only to obtain a nonflammable surface layer, because it is a suspension of water-insoluble compounds. The above limits the scope and refers to the lack of structure.

The closest in technical essence to the claimed is a method of obtaining a water-resistant agribiotechnology composition for wood, which consists in the preparation of two solutions: aqueous solution of orthophosphoric acid (8,5-10,2 wt. %) and urea (11,4-of 18.4 wt.%), solution of non-ionic surface-active substances (surfactants) in alkyd resin with subsequent introduction of the aqueous surfactant solution in the alkyd resin with vigorous stirring. This forms a fine emulsion, which is applied to the wood under pressure in an autoclave, or by spray gun or brush to gain 15-120% by weight of the processed material. (RF patent 2133191 CL 27 To 3/52, 1999).

Next, the wood is agostoni. The disadvantages of this method include the high cost, the duration of the process.

The aim of the present invention is simple environmentally friendly way of getting agribiotechnology composition for wood and water-resistant, low-toxic composition.

This goal is achieved by preparing two aqueous: solution for primary impregnation containing salt - retardants and preservatives, and surfactants from the class polyoxyethylene ALKYLPHENOLS type OP 7, OP-10 or similar, the solution to the second (secondary) impregnation of a solution of calcium chloride.

The solution for re-treatment is prepared by dissolving in water a solid calcium chloride according to GOST 450-77 brand "hydrated" with mass fractions of the main substance of 80% or breeding of calcium chloride brand liquid with a mass fraction of the main substance of 35%.

The solution for the initial impregnation is prepared from a map of a grade according to GOST 18918-85 (ammonium dihydrophosphate), semimodule of magnesium sulfate on THE 113-12-11.080-87, borax according to GOST 8429-77, surfactants according to GOST 8433-81 (OP-7 or OP-10).

The solution for the initial impregnation prepared from thermal phosphoric acid according to GOST 10678-76, ammonia water according to GOST standard 9-92, semimodule of magnesium sulfate on THE 12 is thew, with a sprayer or by immersion in 10-60oWith the first solution for the initial impregnation and after 0.5-1 hour - the solution for re-treatment.

The solution for the initial impregnation provides heat - and bioprotective salt, a surfactant, and water in ratios, wt%:

Ammonium dihydrophosphate (I) - 11,0-12,0

As magnesium sulfate (II) - 23,0-25,0

Borax (III) - 5,0-6,0

OP-7(OP-10) - 1,0-1,5

Water - 60,0-55,0

The solution is to re-impregnation contains 18,0-21,0 wt.% calcium chloride (IV) and 82,0-79,0% water.

The fire retardant properties of the composition formed by sequential impregnation of wood, determined on samples of pine wood size HH mm, prepared in accordance with p. 31 fire 251-98 "flame retardants and substances for wood and materials based on it. General requirements. Test methods".

Testing is carried out according to GOST 16363-98 Wood. Determination of the flame retardant properties of the coating and impregnating compositions using ceramic tubes". For testing use the device structure of the Institute, consisting of ceramic boxes sizes HH mm and 16 mm thick, mounted on a metal stand that has a sash for regulating the air supply to the combustion zone arr is on of the motor, fixing a position of the sample in the center of the ceramic boxes; umbrella; thermometers; automatic potentiometer type KSP-4.

Determine the mass loss of the sample (M) and the maximum increment of temperature (Tmax). Largest M fire-protected wood is classified according to GOST 16363-98 into groups of Flammability: nonflammable (M<9%),flame retardant (9%<M>30%). The value of M and Tmaxfire-protected wood is classified according to GOST 12.1.044-89 groups of Flammability: nonflammable (M<60%; Tmax<60 C) and combustible (M>60%; Tmax>60C).

In a ceramic box with continuously operating burner enter the test sample after the establishment of the insertion point (the upper part of the chamber) temperature (2005)oC. During the experiment on the ribbon diagram of the potentiometer and recording the maximum temperature of the gaseous combustion products.

Through (3002) with the gas supply to the burner stop and leave the sample to cool for 20 min after cessation of burning. The cooled sample is removed, allowed to stand for 1 hour at room temperature and humidity of not more than 70% and define m

The results of the tests and the conditions for receiving onebusaway snpb 251-98 as follows: treated by the composition of the samples of pine wood size HH mm weighed after conditioning, then aged for 72 hours in a vessel with water, extract, to condition at room temperature until constant mass is weighed again to determine the mass loss (M1=(weight before soaking - weight after soaking)*100/body weight before soaking, % Rel). Then spend the definition of fire-retardant properties, as described above M,Tmax). The results in table (examples 13-16).

Biological protection of treated wood is assessed according to the GOST 16712-71 "Means protective for wood. Test method toxicity".

As a wood-destroying fungus use Caniphora puteana. Determine the mass loss for the six-treated composition of the samples of pine wood size HH mm and three untreated control samples. Weight loss of the treated samples with weight gain dry salts, kg/m3: 22,0; 31,2; 40,4; 40,6; 55,0; 64,1 is: 12,7; 12,1; 11,9; 11,7; 5,8; 2,8%, respectively. Weight loss for untreated samples 58,5% (average value), which corresponds to the increase of the service life of the impregnated wood 4.6-21 times.

To obtain solutions for initial and re-treatment are shown in examples 1-4.

Example 1

In CBM reactor with anchor stirrer download 0,575 m3howling, 50 kg of borax and 10 kg OD-7, stirred for 1 hour. Get 1000 kg of solution for initial impregnation.

Example 2

In CBM reactor with anchor stirrer download 0,264 m3water 0,046 m3orthophosphoric acid with a mass fraction of 70%, 0.04 m3aqueous ammonia mass fraction of 25%, through a hatch reactor -250 kg semimodule magnesium sulfate, 50 kg of borax and 10 kg of OP-10, stirred for 2 hours. The introduction of aqueous ammonia in the reactor are such a rate that the temperature was not above the 50oC. Get 1000 kg of solution for initial impregnation.

Example 3

In CBM reactor with anchor stirrer load 0.8 m3water and 250 kg of calcium chloride brand "hydrated". Stirred for 1 hour. Get 1050 kg solution for re-treatment.

Example 4

In CBM reactor with anchor stirrer download 0,477 m3calcium chloride brand "liquid" and 0,523 m3water. Stirred for 1 hour. Receive 1085 kg of a solution for re-treatment.

As seen from the above examples, the inventive method are simple, environmentally friendly and allows you to get water-resistant, low-toxic compounds with high ognezashhitnye characteristics.

Such compositions can be widely used in Sanogo agribiotechnology composition for wood by impregnation of wooden structures at a temperature of 10-60oWith series two aqueous solutions: the first solution containing ammonium dihydrophosphate, as magnesium sulfate, borax, polyoxyalkylene ALKYLPHENOLS as surface active agents and water in the following ratio, wt. %:

Ammonium dihydrophosphate - 11,0-12,0

As magnesium sulfate - 23,0-25,0

Borax - 5,0-6,0

Surfactant - 1,0-1,5

Water - 55,0-60,0

then a solution containing 18,0-21,0 wt. % of calcium chloride and 79,0-82,0 wt. % of water.

2. Onebusaway composition for primary wood impregnation containing ammonium dihydrophosphate, as magnesium sulfate, borax, polyoxyalkylene ALKYLPHENOLS as a surfactant and water in the following ratio, wt. %:

Ammonium dihydrophosphate - 11,0-12,0

As magnesium sulfate - 23,0-25,0

Borax - 5,0-6,0

Surfactant - 1,0-1,5

Water - 55,0-60,0

3. Onebusaway composition for re-impregnation of wood, which is an aqueous solution of calcium chloride in the following ratio, wt. %:

Calcium chloride - 18,0-21,0

Water - 79,0-82,0

 

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