Microencapsulated fire extinguishing agent and method of its obtaining
FIELD: fire safety.
SUBSTANCE: describes a microencapsulated fire extinguishing agent comprising, in each microcapsule, a polymeric shell and a core containing as carrier gas components having a boiling point of -155 to +10°C, a flame retardant and a combustion inhibitor in a weight ratio: a carrier gas of 5-50%, a flame retardant of 30-70%, a flame retardant of 1-25%. A method for the preparation of microcapsules is also described.
EFFECT: microencapsulated fire extinguishing agent with high reliability and fire-extinguishing efficiency was obtained.
19 cl, 1 tbl, 8 ex
SUBSTANCE: invention relates to obtaining fireproof polyurethane foam from foamed reaction mixture, which consists of mixture of polyols, polyisocyanate and fireproof additives (fire-retardants). Composition for obtaining fireproof polyurethane foam is described, which contains mixture of polyols, polyisocyanate and fireproof additives, with mixture of ammonium polyphosphate and ammonium sulphamate being applied as additives in quantity from 10 to 40 wt % of the total amount of components, and ratio of ammonium polyphosphate to ammonium sulphamate in mixture constitutes respectively from 1:2 to 7:1 weight parts.
EFFECT: obtaining polyurethane foam, which has maximal fire resistance (flammability group G-1), practically invariable density in comparison with polyurethane foam, obtained without fireproof additives.
2 tbl, 1 ex
SUBSTANCE: group of inventions relates to heat-resistant materials which can be used, for example, in construction and other fields. The heat-resistant foamed polymer composite material contains at least one foamed rubber or foamed polymer as a base, wherein the base has perforations where the pores open along the surface of the material, and filler which fills the volume of the perforations and the opened pores, which contains at least one rubber or polymer, having heat-resistance in the temperature range of 200-700°C, or liquid glass, as well as a curing agent and a stabiliser. The method of producing a base includes perforating the surface of a base in the horizontal section to 75% of the area. On the remaining non-perforated part of the surface of the base, material is removed from the surface until pores of the base open. The volumes of the perforations and the volumes of the opened pores cleaned. A method of producing heat-resistant foamed polymer composite material is also disclosed.
EFFECT: invention enables to obtain fire-proof heat-resistant material, having reliable adhesion of the filler with the base and improved distribution of the filler in the base matrix.
62 cl, 1 dwg
SUBSTANCE: invention relates to fire-resistant polymer composite material and can be applied in aviation, space technology and different fields of construction. Fire-resistant foamed polymer composite material contains perforated foamed polymer as base and filler, filling its pores. Filler contains mixture of synthetic rubbers, possessing fire resistance in the range from 200 to 700°C, if necessary - stabiliser, solvent, pigments, flame retardants, solidifying agent - polyamine, aminosilane or their mixtures. Finished perforated foamed polymer material with area of perforated surface in horizontal section 15-60% is used, liquid filler is prepared and used to fill perforation volumes of foamed polymer material at room temperature until density of composite material 0.25-1.0 g/cm3 is achieved, with further solidification of material for 15-28 hours.
EFFECT: invention makes it possible to increase fire-resistance of foamed polymer composite material, reduce, simplify manufacturing process and extend field of its application.
23 cl, 1 dwg, 1 tbl
SUBSTANCE: composition includes, wt. p.: epoxy diane resin 100.0, hardener - polyethyleneamine 15.0, filler - cross-linked polyacrylamide POLYSWELL in form of granules, preliminarily swollen in water, in weight ratio 1:10 5.0-20.0.
EFFECT: increased fire resistance of composites based on epoxy diane resin.
SUBSTANCE: invention relates to fire-resistant compositions of polyamide resin. Claimed is a fire-resistant composition of the polyamide resin, including a polyamide (A), which contains a unit, representing diamine and containing not less than 70 mol% of a unit, representing p-xylylenediamine, and a unit, representing dicarboxylic acid and containing not less than 70 mol% of a unit, representing a linear aliphatic dicarboxylic acid, which has from 6 to 18 carbon atoms; an organohalogen compound (B), which serves as fire-protective means; an inorganic compound (C), which serves as auxiliary fire-protective means; and an inorganic filling agent (D), where the polyamide (A) includes a polyamide, which has the concentration of phosphorus atoms, constituting from 50 to 1000 ppm, and a value YI, which by results of differential colorimetric analysis in accordance with JIS-K-7105, does not exceed 10, and the content of the organohalogen compound (B), the content of the inorganic compound (C) and the content of the inorganic filling agent (D) constitutes from 1 to 100 wt.p. from 0.5 to 50 wt.p. and from 0 to 100 wt.p., respectively, counted per 100 wt.p. of the polyamide (A). Also claimed is the moulded product from the said composition.
EFFECT: composition has excellent mouldability, mechanical properties, heat resistance and low water absorption.
15 cl, 4 tbl, 21 ex
SUBSTANCE: invention relates to fire-resistant thermoplastic compositions, preferably thermoplastic polyurethane (TPU) compositions used when high fire-resistance is desirable, e.g., for wire and cable applications. The composition contains: (a) a thermoplastic polyurethane polymer, (b) a flame retardant and (c) polysiloxane which is modified by adding, preferably at the end of the chain, functional groups such as vinyl, methacrylic and/or epoxy groups. The polysiloxane is present in amount of 0.25 to 0.75 wt % with respect to the total weight of the composition. The composition is used as heat-insulating material for electrical conductors or as electrical conductor sheathing in wire and cable design.
EFFECT: mixture does not drip in case of fire and has very high heat resistance.
12 cl, 1 tbl, 1 ex
SUBSTANCE: invention relates to phosphorus-containing fire retardants, particularly, but not exclusively, for glass-filled polyamide resins. A fire-resistant polymer composition contains a main polymer (A), where the main polymer (A) includes a glass-filled polyamide, and a benzyl-substituted organophosphorus compound (B). The organophosphorus compound (B) is present in amount of about 10 wt % to about 30 wt % with respect to the amount of the fire-resistant polymer composition.
EFFECT: said organophosphorus compounds, especially if coupled with specific synergists, are effective fire retardants for thermoplastic polymers, including polyamides, especially glass-filled polyamides.
14 cl, 4 tbl, 10 ex
SUBSTANCE: composition contains polyolefin, magnesium or aluminium hydroxide or their mixture and carbon in the form of graphite nanoplates. A ratio of the components is as follows, wt %: polyolefin - 60-85, magnesium or aluminium hydroxide or their mixture - 10-20, graphite nanoplates - 5-20.
EFFECT: obtaining polyolefin-based materials, characterised by the reduced combustibility and possessing a complex of physical and mechanical properties.
4 dwg, 3 tbl
SUBSTANCE: composition comprises liquid low-molecular siloxane rubber, ethylsilicate-40 or tetraethoxysilane as a curing agent, alkoxytitranium borate and vanadium pentoxide. Components are in the following ratio, pts.wt: liquid low-molecular siloxane rubber - 100, ethylsilicate-40 or tetraethoxysilane - 10-30, alkoxytitranium borate - 10-30, vanadium pentoxide - 10-20.
EFFECT: high water-resistance, wear-resistance and fire-resistance of the coating.
2 cl, 1 tbl
SUBSTANCE: invention relates to elaboration of a fireproof decorative-finishing material - artificial leather, obtained by coagulation of a solution based on a polyurethane composition. The decorative-finishing material contains a woven layer, preliminarily impregnated with an aqueous silicone emulsion and dried to the weight gain of the latter of 3.0-8.5 wt %, on which, after that, a primer and a front layer are successively applied with intermediate drying. The primer layer is made of a composition, which contains 25% solution of polyurethane "Vitur 0512", dimethyl formamide with a viscosity of 120-170 P and a dry residue 18.0-22.0 wt % for the primer layer. The front layer is made of a composition, containing 15% solution of polyurethane "Vitur 0512", a surface-active substance OP-10, di-(2-ethylhexyl)-phthalate, ammonium polyphosphate, dimethylformamide with a viscosity of 205-210 P and a dry residue 26.0-27.0 wt % for the front layer. Front layers are coagulated in a coagulation bath with a composition of 30.0 wt % of dimethylformamide and 70.0 wt % of water at a temperature of 50°C for 20 min, washed in a bath with flowing water until content of dimethylformamide is less than 3.0%, dried and finished with a polyurethane composition, containing 25% solution of polyurethane "Vitur 0512", the surface-active substance OP-10, di-(2-ethylhexyl)-phthalate, ammonium polyphosphate, dimethylformamide with a viscosity of 84 P and a dry residue 24.5 wt %. After that, the half-finished product is processed in a padding bath with compression rolls at a temperature of 60°C with an aqueous solution of a mixture of polyphosphoric acids and urea with a ratio of nitrogen and phosphorus respectively 1.0:1.56-1.80 and drying for 4 min at a temperature of 120°C until the weight gain is 20.0-25.0 wt %. The obtained finished material has a ratio of layers by weight, equal: woven layer, including 3.0-8.5 wt % of the silicone emulsion: polyurethane layers: the said mixture of polyphosphoric acids and urea respectively 1.0:0.85-0.93:0.37-0.48.
EFFECT: obtained fireproof decorative-finishing material has high hygienic parameters and fire resistance by GOST 25076-81 - 0 mm/s, time of smouldering - 3-4 s.
2 cl, 4 tbl, 7 ex
FIELD: medicine, life saving equipment.
SUBSTANCE: invention relates to fire and explosion protection. A non-flammable and explosion-proof methane-air mixture contains a fire retardant diluted in carbon dioxide and presented by propylene and/or isobutylene in the volume ratio of the fire retardant to carbon dioxide equal to 1 : 4-10, with the following content of said components in the protected capacity, vol %: Propylene and/or isobutylene 1.5 - 4.0; Carbon dioxide 8.0 - 15.0; Methane 4.0 - 13.0; Air up to 100.
EFFECT: lower consumption of the retardant.
SUBSTANCE: invention relates to the field of fire and explosion safety, and specifically for preventing ignition and explosion of methane-air mixtures. The method involves introduction into the atmosphere of a protected volume when the concentration of methane in the air reaches 3-4%, a two-component gas composition, which consists of carbon dioxide and carbon tetrachloride with the relation of the parts of the components CCl4:CO2=1:(6-9). As this takes place the amount of carbon tetrachloride in the protected air volume is kept at 2-3% of the volume.
EFFECT: increase in the effectiveness of the method of preventing ignition and explosion with minimal use of the inhibiting composition.
1 tbl, 3 dwg
FIELD: fire-fighting, particularly fire-extinguishing compositions adapted to prevent methane-air mixes ignition and explosion.
SUBSTANCE: gas composition comprises carbon dioxide and inhibitor, namely carbon tetrachloride. Composition components are mixed in the following optimal proportion (% by volume): 10-15 of CCl4 and 85-90 of CO2. Carbon tetrachloride content in space to be protected is 1-3 % by volume.
EFFECT: incombustibility and non-toxicity, increased efficiency of methane-air mix ignition and explosion in the case of slow methane in leakage or avalanche-like methane inflow.
FIELD: combined gas fire-extinguishing means used for extinguishing of class A2, B, C and E fires, retarding of explosion-hazard gaseous media, and also localization of class A1 fires.
SUBSTANCE: gas fire-extinguishing composition contains 1-98 wt% of fully or partly fluorinated hydrocarbon or mixture of such hydrocarbons, hydrocarbon containing 3 atoms of hydrogen in molecule, wherein hydrogen atoms are fully or completely substituted with atoms of iodine and fluorine, or mixture of such hydrocarbons used in an amount of from 1 to 98 wt%. Compound additionally contains 1-10 wt% of propylene.
EFFECT: provision for improved fire-extinguishing efficiency commensurable with that of bromine-containing Halons and compositions comprising fluorine-containing saturated hydrocarbons and iodine-containing hydrocarbons, and improved characteristics as to toxicity and corrosiveness.
FIELD: combined fire-fighting compositions.
SUBSTANCE: fire-fighting composition comprises trifluoromethane used as retarder and taken in amount of 85-95% by weight and fire inhibitor, namely tributylphosphate, taken in amount of 5-15% by weight.
EFFECT: increased fire-fighting capabilities, reduced costs and toxicity of fire-fighting composition.
SUBSTANCE: proposed system consists of stationary system of pipes installed directly at the ship to feed nitrogen into cargo and mobile module for nitrogen generation and control over system operation. This system should create gas-air medium with oxygen content of not over 5% inside the ship hold. To control the nitrogen flow rate and time for creation of said medium at transportation of cargoes that feature different density, dispersion and loading height gas flow meter is arranged at said system of pipes. Said flow meter should output the signal to pressure-relief valves for pressure increase or decrease in said system.
EFFECT: ruled out smouldering and ignition.
3 cl, 1 dwg