The composition for fire - wood and biosecurity (options)

 

(57) Abstract:

Usage: in the woodworking industry and building materials industry in the protection of wood products from fire and biodegradation.

Essence: according to the first variant, the composition for fire - wood and biosecurity as a flame retardant comprises a mixture of reaction products when 34-78oWith equimolar amounts of dialkylphosphate containing 1-4 alkyl C atoms, amine f-crystals RNHR'where R is H or alkyl WITH1-C7and R' is alkyl WITH1-C7, with a total content of the phosphorus flame retardant of 7.6-22.3 wt. % and nitrogen of 3.4 to 10.1 wt. %. According to the second variant, the composition contains a mixture of products of interaction with 128-150oWith equimolar amounts specified dialkylphosphate with dicarboxylic acid f-crystals HOOCRCOOH, where R is alkyl WITH1-C7or alkenyl2-C4with a total phosphorus content in the flame retardant 9,0-15,47 wt. %. According to a third variant, the composition contains a mixture of products of interaction of equimolar quantities specified dialkylphosphate with carbamido when 34-78oWith or is 50-170oWith Amida carboxylic acid f-crystals RCOHR'R"where R is H, alkyl WITH1-C4or alkenyl2-C4and R t R'is H or alkyl With

The invention relates to building materials industry and wood processing industry, namely, protection technology of wood products from fires and biodegradation.

Know the use to protect the wood from burning and decay of various compositions containing phosphorus compounds. However, compositions containing inorganic phosphorus compounds over time "Myslivets" on the surface of the wood. "Vydeleny layer has low adhesion to the wood and after a while flaking off from the surface, thereby reducing the effectiveness of protection. Therefore, preference is given to formulations based on organophosphorus compounds /I/.

One of these compounds, protecting the wood from rotting, is a mixture of trichloracetate, chloroparaffin, oxydiphenylene and acetone /2/. However, the effectiveness of it as a flame retardant low.

The closest to the proposed invention the technical essence is a composition for fire - wood and biosecurity, including 100 wt.h 3-dialkylphosphinate and 100-400 wt.h. water-soluble melamine-formaldehyde the organophosphorus compounds, increased.

However, this structure has several disadvantages. First, part of the flame retardant resin quickly turns into a water-insoluble state. This leads to irreversible separation of the composition, making it unusable, i.e., reduces the survivability of the composition. Secondly, melamine-formaldehyde resin incompatible with many paints, which often makes it impossible for subsequent coloring of wood products. In addition, this composition is ineffective as a bioprotectant tools.

The purpose of this group of the invention is to improve the protection of wood against fire and biodegradation, as well as the stability of the composition during storage and providing the possibility of staining the wood.

This problem is solved, first, the composition for fire - wood and biosecurity on the basis of the phosphorus - and nitrogen-containing organic flame retardant, and according to the first variant as a flame retardant composition comprises a mixture of reaction products at a temperature of from 34 to 78oWith equimolar amounts of dialkylphosphate containing alkyl of 1-4 C atoms1with an amine of General formula: RNHR1where R is H or alkyl WITH1-C7and R1and the d 1,09-1,11 g/cm3, the refractive index 1,398-1,412, conditional viscosity by viscometer VZ-246 45-52 C and pH 7,0-7,4.

Mainly such a composition contains a mixture of reaction products of dimethylphosphite with diethylamino with a total phosphorus content of 20.1-of 20.6 wt. and nitrogen from 9.0 to 9.3 wt. bulk density of 1.09-1,11 g/cm3, the refractive index 1,398-1,412, conditional viscosity by viscometer VZ-246 at 20oWith 45-52 C and pH 7,0-7,4.

This task is also solved by a composition for fire - wood and biosecurity based on phosphorus-containing organic flame retardant, and according to the second variant of the invention the composition contains as a flame retardant mixture of the reaction products at a temperature of from 128 to 150oWith equimolar amounts of dialkylphosphate containing alkyl of 1-4 C atoms1with a dicarboxylic acid of General formula: HOOCRCOOH, where R is alkyl WITH1-C4or alkenyl C2-C4with total phosphorus content in the flame retardant 9,0-15,47 wt. bulk density 1,22-1,25 g/cm3, the refractive index 1,443-1,560, conditional viscosity at 20oWith the viscometer VZ-246 63-74 C and a pH of 6.0 to 6.7. Preferentially, the composition according to the second invention comprises a flame retardant mixture of the reaction products of dimethylphosphite from Malinov is 48-1,506, conditional viscosity at 20oWith the viscometer VZ-246 70-74 C and a pH of 6.1 to 6.7, or with malonic acid with a total phosphorus content of 15.0-15,47 wt. bulk density 1,22-1,23 g/cm3, coeff.refraction 1,443 - 1,447, conditional viscosity at 20oWith the viscometer B3-246 63-65 C and pH 6,0-6,3.

This problem, also solved by a composition for agnei biosecurity wood-based phosphorus - and nitrogen-containing organic flame retardant, and according to the third variant of the invention the composition comprises a phosphorus - and nitrogen-containing flame retardant mixture of the reaction product of equimolar quantities of dialkylphosphate containing alkyl of 1-4 C atoms1with urea at a temperature 34-78oWith or when the temperature is 50-170oWith Amida carboxylic acid of General formula: RCONRIRIIwhere R, RIand R11- H alkyl or alkenyl1-C4, with a total content of the phosphorus flame retardant 8,2-a 20.2 wt. and nitrogen 3,6-16.4 wt. bulk density of 1.11-1.18 g/cm3, coeff. refraction 1,383-1,445 and conditional viscosity at 20oWith the viscometer EOI 246 39-50 C and pH 6.6 and 7.6.

Preferentially, the composition according to the third variant of the invention contains as a flame retardant mixture of the reaction products of dimethylphosphite with dimethylphenylamine 1,443-1,445, conditional viscosity at 20oC viscosimetry B3-246 40-50 C and pH 6.7 to 6.9 or methacrylamide with the total phosphorus content in the flame retardant 15,8-16,3 wt. nitrogen 7,0-7,5 wt. bulk density of 1.13-1,15 g/cm3, coeff. refraction 1,441-1,443, conditional viscosity at 20oWith the viscometer VZ-246 39-44 C and a pH of 7.1 to 7.2.

To protect wood products from fire and biodegradation on the surface of the products put the composition in an amount of 50 g/m2.

The invention is illustrated by the following examples and tables 1-3.

Example 1. 73 g of diethylamine and 110 g of dimethylphosphite (DMF) (molar ratio 1:1) is stirred and heated to 362oC. to Withstand the reaction mixture at this temperature for 15-20 minutes, the temperature was raised to 752oC and maintained at this temperature for 0.5 h, and then cooled to 202oC.

The resulting composition is a mixture of products of interaction between DMF and diethylamine, as evidenced by the results of its rectification: the first products distills at 136-137oWith; a number of other compounds at a temperature of from 139 to 150oC. the Final product of rectification are bright, resinous substance.

Example 2. 116 g of maleic kislota within 15-20 minutes the temperature was raised to 150oC and incubated for another 2-3 minutes. Then the reaction vessel is cooled to 202oC.

The resulting composition is a mixture of products of interaction of maleic acid and DMF, as evidenced by the results of its rectification: the first products distills at 153oWith a number of other compounds at a temperature of from 158 to 170oC. the Final product is a resinous substance black.

Example 3. 104 g of malonic acid and 110 g of DMF (molar ratio 1:1) mix and carry out the reaction under the conditions of example 2.

The resulting composition is a mixture of products of interaction of malonic acid and DMF): the number of the reaction product is distilled over at a temperature of 157-170oC; the final product is a resinous substance of a dark brown colour.

Example 4. 73 g of N,N-dimethylformamide and 110 g of DMF (molar ratio 1: 1) is stirred and heated to 170oC. When this temperature was kept for 20 min, then cooled to 202oC.

The resulting composition is a mixture of products of interaction of N, N-dimethylformamide and DMF: in case of rectification of the most low-boiling fraction Argonauts at 136oWith some of the other products with temperatured and 110 g of DMF (molar ratio 1:1) is stirred and heated to 50-51oC. At this temperature, incubated for 15-20 minutes and then the temperature was raised to 60-65oC and maintained at this temperature for 7-10 minutes. After that the reaction mixture is cooled to 202oN

The resulting composition is a mixture of products of interaction of methacrylamide and DMF: when it first distillation fraction distilled at 72oWith the number of follow-up at 74 OoC; the final product is a resinous product is brown in color.

Example 6. 60 g of urea and 110 g of DMF (molar ratio 1:1) is stirred and heated to start the reaction (34oC). Then push the heat off. After reaching 762o(As a result of self-heating of the reaction mixture), the reaction vessel is maintained at this temperature for 1.5 hours, then cooled to 202oC.

The resulting composition is a mixture of products of interaction of urea and DMF: when it first rectification product Argonauts at 132oS; number of follow-up when 135-195oC. the Final product of the distillation of resinous substance milky color.

Similarly receive the compositions in examples 7-14.

Example 15. 11O g dimethylphosphite and 144 g hidromecanico acid (molar section 15-20 minutes of synthesis temperature increased until 1502oC and the reaction mixture was incubated for 2-3 minutes then cooled to room temperature (202oC).

The resulting composition is a mixture of products of interaction with gidromolot acid with dimethylphosphite, as evidenced by the results of its rectification: the first fraction Argonauts at a temperature 159-161oC, the subsequent fraction 162-178oC, the remainder is a resinous substance from dark brown to black.

The resulting composition has the following operational characteristics: the rate of ognezashita (weight loss in a ceramic tube) 3,8 4,3% of the duration of the self-burning flame 0 and the decay 0; adhesion of paint to the treated part of the wood enamel PF-1126 and varnish SC-218 1 point. Physico-chemical properties are shown in table 2.

Example 16 (the prototype). Preparing a composition by mixing the following components:

0,0 dimethyl 2 carbamoylphosphate 50

Melamine-formaldehyde resin brand GM-C on THE 6.10.1253-79 50

Water 20

The composition is applied to the surface of the wood in the amount of 120 g/m2to the content of 0,0-dimethyl-2-carbamoylphosphate 50 g/m3.

The floor is of Ostapov, obtained in examples 1-16 are given in tables 2-3.

Check ognezashita the ability of the compounds was performed with a ceramic tube according to GOST 12.1.044-89, antiseptic properties with strain of the fungus Coniophora Cerbella according to GOST 16712-71, adhesion of paints and varnishes (enamels PF-1126 based on modified pentaftalevyh alkyd resin on THE 6-10-1540-78 and varnish SC-218-based ColleXion according to GOST 4976-83) method of lattice cuts on GOST 15140-80, survivability, structures visually to bundle structures (maximum duration of test 1.5 years).

As can be seen from table 3, the use of the compositions according to the invention allows to increase the efficiency of wood protection against fire and biodeterioration and enables its subsequent painting. While the persistence of the composition compared to the prototype increases tenfold. TTT TTT TTT

1. The composition for fire - wood and biosecurity on the basis of the phosphorus - and nitrogen-containing organic flame retardant, characterized in that the phosphorus - and nitrogen-containing organic flame retardant contains a mixture of reaction products with 34 78oWith equimolar amounts of dialkylphosphate containing alkyl of 1-4 atom, with an amine of General formula RNHR', where R is hydrogen or C13, the refractive index 1,398 1,412, conditional viscosity viscosimetry VZ-246 45-52 C and pH 7.0 to 7.4,

2. Composition under item 1, characterized in that it contains a mixture of reaction products of dimethylphosphite with diethylamino with a total phosphorus content of 20.1 to 20.6 wt. and nitrogen at 9.0 to 9.3 wt. bulk density 1,09 1,11 g/cm3, the refractive index 1,398-1,412, conditional viscosity viscosimetry VZ-246 at 20C 45-52 C and pH 7,0-7,4.

3. The composition for fire - wood and biosecurity based on phosphorus-containing organic flame retardant, characterized in that the phosphorus-containing organic flame retardant contains a mixture of reaction products at a temperature of from 128 to 150oC equimolar amounts of dialkylphosphate containing alkyl of 1-4 C atoms with a dicarboxylic acid of General formula: RO, where R is alkyl WITH1-C4or alkenyl C2-C4with total phosphorus content in the flame retardant 9,0-15,47 wt. bulk density 1,22-1,25 g/cm3, the refractive index 1,443-1,560, conditional viscosity at 20oC viscosimetry B3-246 63-74 c and a pH of 6.0 to 6.7.

4. The composition according to p. 3, characterized in that it contains a mixture of reaction products of dimethylphosphite with maleic acid with the General soderjaniu at 20C on viscosimetry VZ-246 70-74 C and a pH of 6.1-6.7 or with malonic acid with the total content of phosphorus from 15,0 to 15.47 wt. bulk density 1,22-1,23 g/cm3, the refractive index 1,443-1,447, conditional viscosity at 20C for viscosimetry VZ-246 63-65 C and pH 6,0-6,3.

5. The composition for fire - wood and biosecurity on the basis of the phosphorus-and nitrogen-containing organic flame retardant, characterized in that the phosphorus - and nitrogen-containing flame retardant contains a mixture of the reaction product of equimolar quantities of dialkylphosphate containing alkyl of 1-4 atoms With urea at 34 78oWith or with 50 170oWith Amida carboxylic acid of General formula: RCONP'R", where R is hydrogen, C1WITH4-alkyl or C2C4alkenyl, R' and R" is hydrogen or C1WITH4-alkyl, with the total content of the phosphorus flame retardant 8,2 to 20.2 wt. and nitrogen to 3.6 16.4 wt. with a bulk density of 1.11 1.18 g/cm3, the refractive index 1,383 1,445 and conditional viscosity at 20C on the viscometer VZ-246 39 50 C and pH 6.6 to 7.6.

6. The composition according to p. 5, characterized in that it contains a mixture of reaction products of dimethylphosphite with dimethylformamide with a total content of the phosphorus flame retardant 16,9 17,4 Mac nitrogen of 7.6 to 7.8 wt. bulk density of 1.12 - 1,14 g/cm3, the refractive index 1,445 1,443, conditional viscosity at 20C for viscosimetry B3-246 40 50 C and pH of 6.7 to 6.9 or methacrylamide with common soda is elmline 1,441 1,443, conditional viscosity at 20C for viscosimetry B3-246 39 44 c, pH of 7.1 to 7.2.

 

Same patents:

The invention relates to the protection of timber against biodestruction, in particular to organic substances, which are applied to wood or similar materials

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: chemistry.

SUBSTANCE: invention relates to use of alkoxylated amines to treat wood in order to improve water-repellent properties of wood or reduce the amount of water absorbed by wood. Treatment is carried out with alkoxylated amines of formula where R1 denotes C8-20-alkyl; R2 denotes -[CH2CH(X)O]bH (a-1) or n is an integer from 1 to 4; each of a, b and c independently denotes an integer ranging from 1 to 20; each X is independently selected from a group comprising hydrogen, methyl, ethyl and phenyl. Alkoxylated amines of formula (I), particularly N,N',N' -tris(2-hydroxyethyl)-N-cocoalkyl-1,3-diaminopropane or N,N',N'-tris(2-hydroxyethyl)-N-tall alkyl-1,3-diaminopropane can be used in the composition for treating wood in amount of 0.1-90 wt %.

EFFECT: use of alkoxylated amines of formula (I) to treat wood improves water-repellent properties of wood and reduces the amount of water absorbed by wood.

10 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to antiseptic agents for treating wood and specifically to antiseptics based on water-soluble polymers. The antiseptic consists of a mixture of dry salts and acids, with the following ratio in wt %: partial zinc salt of a polyacrylic acid 1.88-2.5; sodium salicylate 37.88-38.25; salicylic acid 20.25-25.18; citric acid 34.07-39.99, soluble in 50% aqueous solution of a quaternary ammonium salt of formula [R(CH3)2(CH2C6H5)N]+Cl-, R=C10H21-C18H37, with the following ratio of components in wt %: mixture of dry compounds 25; aqueous solution of quaternary ammonium salt 75. Working solutions with concentration of 2.0 wt % and 0.5 wt % are prepared from the obtained antiseptic solution.

EFFECT: antiseptic is more effective in treating wood compared to its counterparts.

2 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: invention relates to wax dispersions in form of nanoparticles, used for hydrophobisation of lignocellulose- and/or cellulose-based materials. The wax dispersion contains water as a continuous phase, an emulsifying agent and wax which forms the dispersed phase. More than 85 wt % of the wax is made up of one or more long-chain hydrocarbons containing more than 20 carbon atoms on average, and the wax has hardening temperature ranging from higher than 40 to 150C. The dispersed wax in form of solid particles has mean particle diameter from 10 to less than 500 nm. The wax dispersion is obtained by heating a mixture containing water, an emulsifying agent and wax to temperature higher than the melting point of the wax, and the molten wax is emulsified using a dispersant and then cooling to temperature lower than the hardening temperature of the dispersed wax phase. Hydrophobisation of materials is carried out by bringing said materials into contact with said wax dispersion and then pressing the material.

EFFECT: obtained wax dispersions contain a large weight ratio of a dispersed wax phase, are stable during storage and are resistant to shearing stress, provide a high hydrophobic effect compared to standard wax dispersions with the same content of wax.

23 cl, 3 tbl, 6 ex

Novel composition // 2535949

FIELD: chemistry.

SUBSTANCE: composition includes, at least, two components a and b. Component a) contains, at least, one mono- and/or multifunctional thiol. Component b) contains, at least, one mono- and/or multifunctional -ene. The molar ratio between the thiol and -ene groups constitutes from 1:0.9 to 1:10. Also described are: element of soaked wood; method of soaking the wooden element, including soaking wood with the said composition with further hardening.

EFFECT: increased water resistance and improved mechanical properties of wood.

13 cl, 10 tbl, 10 ex

FIELD: insulation materials.

SUBSTANCE: method of preparing insulation compound, which can be used for impregnating and pouring high- and low-voltage components of electrical and radio equipment, transformers, and throttle valves, comprises mixing at temperature 50-60°C resin having molecular weight 1000-6000 with phosphorus-containing modifier, in particular triglycidyl phosphate or diglycidyl methyl phosphate, or diglycidyl methyl phosphonate, after which is added stoichiometric amount of hardener, in particular 4,4'-diaminodiphenylmethane or 4,4'-diaminodiphenyl sulfone, or 4,4'-diaminodiphenyl oxide.

EFFECT: reduced viscosity of compound, enhanced insulation and electric-strength properties, and simplified preparation procedure.

2 tbl, 17 ex

FIELD: woodworking industry, building materials industry, in particular wood fire- and biological protection.

SUBSTANCE: claimed composition contains (mass %): starch 4.13-5.0; phosphoric acid 18.36-20.0; amyl alcohol 2.0-3.0; dimethylphosphite 23.58-24.08; dimethylformamide 15.07-16.03; maleic acid 4.15-5.04, ethylene glycol 15.67-18.0, and balance: water. Composition of present invention has living time of 3 years.

EFFECT: composition providing wood fire- and biological resistance without quality losses.

3 tbl, 1 ex

FIELD: chemistry of organophosphorus compounds.

SUBSTANCE: invention relates to compounds with the bond C-P, namely to phosphorus-boron-containing methacrylate that can be used as inhibitor of combustion of polyvinyl alcohol-base film materials. Invention describes phosphorus-boron-containing methacrylate of the following formula: wherein n = 4-8. Polyvinyl alcohol films modified with indicated phosphorus-boron-containing methacrylate shows the enhanced refractoriness, rupture strength up to 206 kgf/cm2, water absorption up to 240% and relative elongation up to 12%.

EFFECT: valuable properties of substance.

1 tbl, 2 ex

FIELD: methods of production of antipyrines; woodworking industry; production of fire-resistant plate products; construction engineering.

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 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, amine modifying agent AM-1 or their mixtures added together with ammonia water in the amount of 0.01-0.02 mass-% per 100 mass-% of carbamide formaldehyde concentrate at subsequent introduction of 1-10 mass-% of carbamide per 100 mass-% of carbamide formaldehyde concentrate, cooling, neutralization of reaction mixture by orthophosphoric acid to pH=6.0-8.0 and introduction of 0.1-0.5 mass-% of sodium fluosilicate and 0.1-0.8 mass-% of potassium bichromate into synthesized product.

EFFECT: optimization of synthesis of antipyrines at enhanced fire resistance efficiency.

1 tbl, 2 ex

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: textile industry.

SUBSTANCE: invention relates to technology of manufacturing flame retarded textile materials, which may be used as filler when manufacturing flame retarded composites and decorative and finishing textile materials. Method of invention comprises applying burning retardant, namely Antipyrene T-2 (methylphosphonamide ammonium salt) onto polycaproamide or polyethylene terephthalate fiber, retardant being used in the form of 5-7% aqueous solution. Fiber is the additionally exposed for 25-30 sec to 350 W CO2-laser emission. Treated fiber contains 22-25% Antipyrene T-2 and is characterized by oxygen index: 35% (polycaproamide) and 42.5% (polyester fiber). Strength of fibers is slightly increased.

EFFECT: substantially increased fire resistance of textiles.

1 tbl, 32 ex

FIELD: polymer materials.

SUBSTANCE: invention provides a method for manufacturing polyvinyl alcohol-based modified films with elevated fire resistance by means treatment with phosphorus-containing compounds. In particular, 5-15% aqueous solution of methyl phosphite borate is used and films are treated during 1-2 min and then dried at ambient temperature. Thus obtained polymers are characterized by good film-forming properties, exhibit self-extinction capability, and show water absorption at a level of 1.14%. Films can be used in various industry and national economy fields.

EFFECT: improved performance characteristics of films.

1 tbl, 3 ex

FIELD: fire-retardant ornamental textile materials, fillers for fire retardant composites.

SUBSTANCE: claimed method includes burn retardant into polyester fiber. As burn retardant 5-7 % dimethyl phosphonate aqueous solution is used. Additionally material is treated with CO2-laser irradiation with power of 350 W, density of 5.3 W/cm, for 25-30 s up to dimethyl phosphonate content on fiber of 12-15 mass %. Fibers are characterized with oxygen index of 31.5-33 %, and fiber durability is narrow increased.

EFFECT: new flame-retardant materials.

1 tbl, 11 ex

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: fire-resistant materials.

SUBSTANCE: porous substrate, in particular polymer substrate, is impregnated with fire-resistant agent, namely organophosphorus compound having hydrophilic or hydrophobic nature to be compatible with surface of porous carrier. Impregnation is effected according to dry impregnation technique.

EFFECT: considerably improved fire resistance of materials without harmful effect on properties of material at temperatures above 200°C.

30 cl, 2 tbl, 4 ex

Up!