The sealing composition
(57) Abstract:The invention relates to chemical technology, in particular to hermetics. Can be used as a sealer connections of steel structures - threaded pipe and other connections for the elements of air, water, gas lines, air-conditioning at elevated temperatures and pressures. The composition comprises, by weight.h.: elastomer with high stickiness - colloquoy 100; the filler is polyethylene or propylene low pressure of 10 to 50. As the elastomer may contain butadiene colloquoy. May contain 10 - 3 wt.h. ethyl alcohol. The technical result consists in providing a reliable sealing during manufacture, during long time operation, in processability during manufacture and use, meets sanitary standards of premises, saves the environment. 2 C.p. f-crystals. The invention relates to chemical technology, in particular to hermetics, and can be used as a sealer compounds of metal structures, first of all threaded pipe and other connections for the elements of air, water, gas lines, air conditio is gastrula, and can be used to improve the reliability of their operation at elevated temperatures and pressures.Know the use of sealing compounds for sealing joints and connections of building structures. (Patent Of Russia No. 1735340, CL. MCI C 09 K 3/10, 1992). The composition comprises in wt.%: butyl rubber 5-10, industrial oil 16-20, modifier 0.1 to 1.0, asphalt, resin and paraffin deposits of 0.1 to 1.0 and filler - the rest. The sealing composition has increased up to 24 h retention, and improved adhesive properties. However, its use for connections and assemblies, supplying drinking water that does not meet sanitary standards due to the presence of oils. In addition, the composition is elastic and does not provide a tight seal threaded connections. In addition, it is used in threaded joints leads to an increase in the effort of screwing up, which leads to leakage due to possible disruption of the thread.Known epoxy resin composition comprising an organic resin and hardener (Cm. patents Japan NN 6025248 B4 class. MKI C 08 G 59/42, 1997 ). The compositions have high elasticity and is used as a sealant, caulking compound, the coating material or adhesive. the residential houses, it is impossible because of toxicity.Known composition in the form of sealing compositions according to the patent of Russian Federation N 2103306, CL MKI C 09 K 3/10, 1998, the basis of the composition are herbalicious - 100 ( wt.h.) and pine rosin 30-50. In addition, the composition contains (wt. h ) oil vacuum 50-96, stearic acid, 2-4 and fillers 58-111. The composition has elasticity, but toxicity and low melting point make this composition unsuitable for use in mains for potable water and hot water.Known sealing composition based on a mixture of rubber with synthetic and natural resins, including, wt.%: butyl rubber 9-12, polybutene 26-30, receptorbinding resin 6-8, rosin 2-3, ethylenepropylene rubber 9 -12, and fillers chalk and talc (Cm. RF patent N 2115683, CL MKI C 09 K 3/10, 1998). The composition cannot be used for sealing joints plastic - plastic (including plasticized unplasticized material). Does not provide composition and sealing threaded joints, plastic, metal, as well as does not provide tight joints, working under pressure.Closest to the claimed solution is a composition for Poluchenie on BNR rubber 13-18, fiber aramid or polyoxadiazole 13-15, basalt wool 5-10, modifiers and fillers (See. RF patent N 2103308, CL MKI C 09 K 3/10, 1998). The compositions are good for building structures, however, cannot be used for sealing elements of the system that supplies hot water under pressure and at a temperature of 30-150oC, due to the low melting point, glass transition. In addition, the compositions are not suitable for sealing threaded joints.As the closest analogue is selected sealing composition that includes an elastomer with high viscosity and filler (Cm. patent RU 2143452 C1, 27.12.1999). In addition to marked from the point of view of the applicant's lack of complexity, the material has insufficient temperature resistance, for example, for heating mains (Tslave= 150oC). The composition is suitable only for waterproofing pipelines (page 3, column 6). There is no correspondence between the components of the sanitary requirements for contacts, for example with drinking water.The objective of the invention is to develop a sealing composition for sealing threaded and other structural joints of pipes, various fittings (valves, fittings, gate valves, shut-off and regulating elementia and other highways, operating at temperatures from 0 to 150oC and at pressures up to 16 ATM. The technical result consists in providing a reliable seal during long periods of operation, and adaptability in the manufacture and use of the composition.The composition must meet the sanitary standards of the residential premises, to prevent emissions into the environment and protection of pipelines.This object is achieved in that the sealing composition that includes an elastomer with high viscosity and filler, they are taken in the following ratio, wt.h.: elastomer 100; filler 10-50.As the elastomer with a high viscosity composition contains colloquoy. As filler it contains polyethylene or polypropylene in the form of powder or chips.As the elastomer with high stickiness it can contain butadiene colloquoy.In addition, to increase the elasticity can be added in the composition of 10-30 wt.h. ethyl alcohol.The sealing composition may be reinforced by the introduction of yarns: polyester, viscose, cotton or fibers from their combinations.You can use cyclocarya in the form of rock elastic or powder mixed with a filler (powder of polyethylene or polypropylene). The resulting mixture is heated to the melting temperature of polyethylene (polypropylene) >90oC. the Mixture is stirred to obtain a homogeneous mass, then trowel or brush applied to the sealing surfaces and assemble. In specific cases, to obtain a greater plasticity in the composition may be added ethyl technical.The proportion of the elastomer and filler in the composition is selected based on its destination. With a minimum content of filler in the composition will have a maximum adhesion (stickiness). Depending on the type of elastomer and filler characteristics would change the composition, strength, temperature resistance.Receive a sealing composition according to the periodic process using standard equipment such as vessels, heat exchangers, pumps, mixers and dispensers. Implemented normal operations: pereosazhdeniya (recrystallization) industrial powder fillers, dissolving the elastomer in an organic solvent (gasoline fractions "Shoe"), preparation of a suspension of filler, regeneration of the solvent. Mix in the solutions given by (metered) number Vodat mastic to the required viscosity. Packing the finished sealing composition produced in retail plastic containers (jars with screw caps 1, 3, 5 l). The total production area branch 50 - 60 m2. A specific proportion of the elastomer and filler in the sealing composition is selected to meet the sealing surfaces, Assembly and operation of ports:
a) the lower limit of fillers (10 - 20 wt. h) is adopted for sealing compounds for threaded joints in all combinations: metal metal plastic plastic;
b) the upper limit of fillers (40 - 50 wt. h) is adopted for stuffing boxes of valves: gate valves, valves, valves, valves;
C) average limit fillers (20 - 40 wt. h) is adopted for sealing compositions flanged joints with soft gaskets (rubber, paronite, and so on ).Example 1. The sealing composition contains as an elastomer 100 wt. including butadiene cyclocarya. In accordance with the above conditions produced by the filler (polyethylene) in three grades (a, b and C). Main features: water resistance, gas impermeability, termorezistentnosti. The adhesion of the sealing composition (peeling from the surface without external pressure compression): 1,5 - 1,6 kg/seeNominal process parameters for all sealed (internal) environments: a pressure of 16 ATM; temperature 0 - 150oC.The composition is simple in operation, convenient for storage, not stratified, remoteoperated.In combination with the threads or fibers composition is a good filler for books, valves and gate valves.Physico-mechanical properties of the sealing composition (example 1): yield strength 15-19 MN/m2; elongation 200%; water absorption of 0.01; gas-tight.The strength of the coupling area: metal 1.5 kgf/cm2; plastic 0,65 kN/cm2.Working process parameters: pressure of 16 ATM; temperature 0-150oC. Applied in the sealing composition of the components meet the requirements of sanitary norms. In competitive prices on two-component mixtures of partially recycled. Increased environmental safe operation of the pipeline systems, eliminates leakage and emergency depressurization compounds and elements. In the first obeshaetsia under pressure compression Assembly regular piping for all cases of practical application. 1. Sealing composition that includes an elastomer with a high adhesiveness and a filler, characterized in that the elastomer with high stickiness it contains colloquoy, and as filler is polyethylene or polypropylene of low pressure in the form of powder or chips and the components of the composition are taken in the following ratio, wt.h.:
Specified elastomer - 100
The specified filler - 10 - 50
2. The sealing composition under item 1, characterized in that the elastomer with high stickiness it contains butadiene colloquoy.3. The sealing composition under item 1 and 2, characterized in that it additionally contains ethyl alcohol in the amount of 10-30 wt.h. on 100 wt.h. elastomer.
FIELD: polymer materials.
SUBSTANCE: invention relates to novel liquid molding compositions comprising water-soluble or water-foaming polymer, which can be employed to improve water and moisture resistance as well as for waterproofing operation, for instance of waterproofing of cables. Composition contains water, water-soluble or water-foaming organic polymer obtained from monomer mixture containing 25 to 90 wt % of nonomer(s) selected from group including (meth)acrylamide and (meth)acrylic acid or salts thereof; 10 to 75 wt % of nonomer(s) selected from group including C8-C30-alkylethoxylated (meth)acrylamides, C8-C0-alkyl(meth)allyl ethers and C8-C30-alkylethoxylated (meth)allyl ethers; and water-miscible organic volatile liquid. Polymer is present in the form of discrete particles with average cross dimension below 10 μm. Invention further provides a method for improving water and moisture resistance of articles and/or preventing introduction of water into interior of article by way of contacting this article with above-indicated composition. Method of imparting waterproofing to outside or internal components of a cable comprises contacting at least one internal component with liquid molding composition. Invention allows preparation of composition capable of protecting fiber-optic cable.
EFFECT: enhanced waterproofing properties.
15 cl, 2 tbl, 11 ex
FIELD: hermetic based on law molecular siloxane rubber, in particular sealing composition.
SUBSTANCE: invention relates to sealing composition vulcanized by reaction with air moisture. Claimed rubber-based composition comprising zinc oxide, ethyl silicate, and diethylaminomethyltriethoxysilane, contains additionally pulverized grinded quartz. As a variant hermetic also contains chalk and/or dolomite. Composition of present invention is useful in sealing of various conjunctions operating in wide temperature limits where oil and gasoline resistance is required.
EFFECT: hermetic with low-cost components and excellent in operating characteristic.
1 cl, 2 tbl, 7 ex
FIELD: chemical technology.
SUBSTANCE: invention relates to a cross-linking binding composition based on an aqueous base comprising (A) an aqueous dispersion of hybrid resin based on polyester-polyacrylate that comprises 50-90 wt.-% of polyester and 10-50 wt.-% of polyacrylate. Hybrid resin is prepared by grafting the composition of unsaturated monomers polymerized by radical mechanism on partially unsaturated hydroxy-functional polyester; and (B) organic polyisocyanate wherein partially unsaturated hydroxy-functional polyester prepared by reaction of mixture of polycarboxylic acid and, optionally, monocarboxylic acids with one or some (cyclo)aliphatic alcohols wherein 0.5-6 mole% of acids and/or alcohols show the unsaturation level of ethylene type. The composition of unsaturated monomers polymerized by radical mechanism comprises a mixture of hydrophobic and hydrophilic monomers. Also, invention relates to a method for preparing composition used for covers comprising above said an aqueous binding composition and substrate with applied cross-linked cover prepared by applying such composition for cover. Invention provides preparing the composition with retaining exploitation indices as result of excessive foam formation and differing with acceptable values of working life and hardening rate.
EFFECT: valuable properties of composition.
16 cl, 3 tbl, 19 ex
FIELD: power industry; petrochemical industry; metallurgy; municipal services and other branches of economy; production and use of sealing materials.
SUBSTANCE: the invention is pertaining to the composition for production of the lyophobic graphitic materials, in particular, to production of composite materials used for grease seals predominantly ensuring potting of "stock-body" type mobile and stationary "body-cover" joints of the pipeline fittings used in power industry, petrochemical industry, metallurgy, municipal services and in other branches of economy. The composition contains the following components( in mass %): 70-90 - black leads, 1-3 - low molecular weight polyethylene of a molecular mass 150-300, 2-7 - sodium silencer, 1-2 - sodium nitrite, 3-6 - top-finished carbon fibers, 2-7 - suspension of polytetrafluoroethylene at a ratio of polytetrafluoroethylene to water of 1:10, 1-5 - glycerin. The invention ensures a high wear-resistance of articles due to a decrease of metallic components corrosion.
EFFECT: the invention ensures a high wear-resistance of articles due to a decrease of metallic components corrosion.
FIELD: oil and gas industry, particularly to prevent fluid migration in channels of the support in working, nonworking or conserved state.
SUBSTANCE: composition includes saponified tall oil pitch, condensed spent sulfite-alcohol liquor and water preheated up to 85-96°C. The components are taken with the following amounts (by weight): saponified tall oil pitch - 35-40;, condensed spent sulfite-alcohol liquor 15-25; and preheated water - remainder. Composition may additionally include dispersed mineral or organic filler taken in amount of 5-80% by weight counting on composition mass. The composition may be used to isolate crack-porous beds during well drilling or as buffer solution during casing pipe cementation.
EFFECT: prevention of gas migration due to forming sealing screens and prevention of fresh headwater and atmosphere pollution, as well as elimination of fire and explosion hazard in neighboring territories.
4 cl, 2 ex, 2 tbl
FIELD: foam-sealing agents.
SUBSTANCE: invention describes a heat-resistant foam-sealing agent comprising polyorganosiloxane rubber, zinc oxide, oligohydride siloxane, amino-compound and vulcanization catalyst. Heat-resistant foam-sealing agent comprises polydimethylmethylphenylsiloxanediol as polyorganosiloxane rubber, oligomethylhydride siloxane as oligohydride siloxane, aminosilane as amino-compound and polyorganoelementosilazane resin as a catalyst in the following ratio of components, mas. p. p.: polydimethylmethylphenylsiloxanediol, 100; zinc oxide, 40-80; oligomethylhydride siloxane, 2.5-4.8; aminosilane, 0.1-0.3; polyorganoelementosilazane resin, 1.5-3.5. Invention provides the development of technological foam-sealing agent showing sufficiently long working life for pouring article to be sealed (30 min, not less), without toxicity, possessing internal adhesion to different backings, retaining elasticity at temperatures from -100°C to +300°C and vulcanizing at room temperature.
EFFECT: improved and valuable properties of agent.
5 cl, 2 tbl, 5 ex
FIELD: manufacture of sealing materials on base of liquid thiocol for sealing-up fuel compartments and structural members of flying vehicles; aerospace engineering; automobile manufacture; shipbuilding.
SUBSTANCE: proposed method includes mixing the sealing and vulcanizing pastes containing dibutyl phthalate with vulcanization accelerating agent; prior to preparation of vulcanizing paste, carbon nano-modifying agents are additionally introduced into dibutyl phthalate and dispersion thus obtained is treated by ultrasound. Used as carbon nano-modifying agents is fulleroid multi-layer nano-modifying agent Astralene or open carbon nano-tubes in the amount of 0.037-0.069 or 0.014-0.020 parts by mass, respectively per 100 parts by mass of vulcanizing paste.
EFFECT: enhanced tensile strength; reduction of relative elongation; enhanced fuel resistance properties and fungus resistance.
3 cl, 1 tbl, 8 ex
FIELD: production of polymeric compositions applied to pressurization of electrodevices.
SUBSTANCE: the invention is pertaining to the field of production of polymeric compositions applied to pressurization of electrodevices, for example, of low-voltage and high-voltage coils of transformers, chokes, etc. The polymeric composition includes a titaniumsiliconorganic oligomer, a KP-303 compound based on oligostheracrylate and a non-saturated epoxy-ether resin. The technical result of the offered invention is an increase of the maximal operating temperature, a decrease of a temperature coefficient of expansion, an increase of the heat conduction, provision of crack- resistance and positive stability to a heat shock. The declared technical task is reached due to the fact, that the composition additionally contains quartz, aluminum oxide, talcum.
EFFECT: the invention ensures an increased maximal operating temperature, a decreased temperature coefficient of expansion, an increase of the heat conduction, provision of crack- resistance and positive stability to a heat shock.
FIELD: polymer materials.
SUBSTANCE: sealant destined to seal metallic packaging joints contains, wt %: synthetic latex with 48-55% solids 100, carboxymethylcellulose sodium salt 2.045, mixture of polyethylene ethers of mono- and dialkylphenols 1.11, disperser (sodium tripolyphosphane) 0.37, casein 0.185, oleic acid 0.37, foam suppressor 0.407, pigment filler 5,92, and water 60.125.
EFFECT: increased viscosity, improved homogeneity, enhanced adhesion, reduced drying time.
SUBSTANCE: invention relates to sealing compositions providing tightness in vacuum and vacuum-autoclaving process of forming polymer composite materials for use in aircraft industry, mechanical engineering, and other national economy areas. Sealing composition, showing high gas impermeability, heat resistance, cohesion strength, adhesion to metal and polyamide film and providing tightness for polyamide film sacs in vacuum formation process at temperature up to 180°C and negative pressure up to 1 kg/cm2 and in vacuum-autoclaving process at pressure 2 kg/cm2 to achieve temperature 125°C, ageing for 30 min, and further heating to 180°C, contains butyl rubber, polyisobutylene with molecular weight 10000-25000, chalk, asbestos, mineral oil, and alkylphenol-formaldehyde resin.
EFFECT: improved performance characteristics.