Grease for sealing threaded connections
(57) Abstract:The present invention relates to technological and operational lubricants and can be used for sealing threaded pipe joints, mainly of oil equipment. The challenge is to develop a lubricant composition for sealing threaded joints, providing a durable coating on the threads, the multiple use of a lubricant when screwing and loosening of threaded connections, as well as reducing the drying time of lubrication. This object is achieved by creating a lubricant composition for sealing threaded joints, including graphite powder, liquid glass is a silicate of sodium, and the powder is thermally expanded graphite obtained by thermoresistive of graphite powder in a furnace at 800-1000C. table 1. The technical fieldThe invention relates to technological and operational lubricants and can be used for sealing threaded pipe joints, mainly oil equipment - casing, tubing and otherThe level of technologyKnown sealing (screw) lubrication R-402, R-416, serially produced for THE 101708-78, to build and once the series of spats over oil oils thickening of the lithium stearates, aluminum, zinc, powders contain lead, copper, graphite. The drawbacks of such lubricants are washed out of the threaded connection, the oxidation of metal powders, which leads to an increase efforts screwing threads, incomplete sealing, disposable use.Also known lubricant for sealing threaded joints.with. The USSR №1413123, 1986), containing, wt.%: graphite powder - 4, aluminum powder - 4, liquid glass - 92. The disadvantages of this grease are insufficient adhesion to metal and dripping with thread, a high coefficient of friction (up to 0.35). This grease after unscrewing the thread completely destroyed and before screwing should be applied again to the cleaned surface and dried for 12-18 hours.Closest to the claimed technical solution on a set of attributes, i.e., the prototype, is the lubricant for threaded connections (ed. St. No. 1505963. Grease for sealing threaded joints. Bull. No. 33 of 07.09.89).Grease for sealing threaded joints contains components, wt.%:Graphite powder 15-65Liquid glass 35-85Lubrication after mixing apply on the thread brush or a brush and dried in natural 0,1 N/mm2), which leads to the destruction layer of grease on the threads during transportation and screwing, uneven coating and the formation of nodules. Long drying time makes it difficult to use lubricant directly in the working conditions. When re-threading the lubricant must be applied again.The inventionInventive task was to develop the lubricant's composition for sealing threaded joints, providing a durable coating on the thread, uniform (without flows and runoff) floor, multi-use lubricant when screwing and loosening of threaded connections, as well as reducing the drying time of lubrication.This object is achieved by creating a lubricant composition for sealing threaded joints, including graphite powder, liquid glass is a silicate of sodium, and the powder is thermally expanded graphite obtained by thermoresistive of graphite powder in a furnace at 800-1000C, in the following ratio, wt.%:The graphite powder 25-35The above-mentioned thermally expanded graphite powder of 0.2-0.5Liquid glass is a silicate of sodium To 100.The graphite powder AUT-II is produced according to GOST vitovich parts of friction.thermally expanded graphite powder obtained by thermal expansion in a furnace at a temperature of 800-1000C various powders of graphite (grade GAK, lubricants, AWT-II, pencil and others). Thermal expanded graphite has a special structure and properties and is used as a sorbent, thermal insulator, the cushioning material.Liquid glass (sodium silicate) commercially manufactured according to TU 6-15-433-92 and is used mainly as an adhesive for paper and cardboard.The use of declared essential features allows to obtain a technical result achieved, namely, to reduce the drying time of the lubricant applied to the threads, 3-4 times, to increase the strength of the coating (dry lubrication) 2-3 times, to provide a multiplicity of unscrewing and screwing threads up to 3 times (at 100% sealing of threaded connections).Information confirming the possibility of carrying out the inventionExample 1. 25 g (25 wt.%) the graphite powder AUT-II and 0.2 g (0.2 wt.%) powder thermally expanded graphite obtained by thermoresistive of graphite powder in a furnace at 800-1000C, was placed in a glass or enamel bowl, added 74,8 g (74,8 wt.%) liquid glass and stirred until homogeneous is received by thermoresistive of graphite powder in a furnace at 800-1000C, put in a bowl and added 69,65 g (69,65 wt.%) liquid glass. The mixture was stirred to obtain a homogeneous paste.Example 3. 35 g (35 wt.%) the graphite powder EUT and 0.5 g (0.5 wt.%) powder thermally expanded graphite obtained by thermoresistive of graphite powder in a furnace at 800-1000C, was placed in a glass bowl, added 64,5 g (of 64.5 wt.%) liquid glass and stirred to obtain a homogeneous paste.The obtained paste is ready for use as a lubricant for sealing threaded joints.The obtained grease compositions (in paste form) are not stratified and stable properties (in closed containers) for 180-200 days.Assessment of quality lubricants conducted on the following parameters: drying time is marked on the thread lubricant - visually to harden the grease; the strength of the dry layer of grease deposited on a smooth steel plate, tested in compression to fracture layer on a tensile testing machine RM-3; number of zavorachivanija (AutoRecovery) thread in a single lubrication - visually at hydrotest threaded connection.The results are given in the table.The table shows that the drying time of grease on the threads has decreased by 3-4 times,Ivani) thread in a single lubrication.The advantages of the proposed composition of the grease for sealing threaded connections may also include a low coefficient of friction (0.1); uniform (without flows) coating; a stronger connection with the metal pipe; filling of all microwave due to the presence in the composition of thermally expanded graphite; 100% sealing of threaded connections due to the elastic aftereffect of the powder particles thermally expanded graphite; the ability to work the lubricant into the threaded connection from-50C to + 400C due to the presence of thermally expanded graphite grease - prototype works from-50C to +S). Grease for sealing threaded joints, including graphite powder and liquid glass sodium silicate, characterized in that it further comprises a thermally expanded graphite powder obtained by thermoresistive of graphite powder in a furnace at 800-1000C, in the following ratio, wt.%:The graphite powder 25-35The above powder is thermally expandedgraphite 0,2-0,5Liquid glass is a silicate of sodium To 100
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.