Insulating impregnating compound
(57) Abstract:Use: for isolation of electrical products. The inventive impregnating compound contains: dimethacrylate bis(ethylene glycol)-phthalate 30 - 50, polymethylphenyl siloxane resin, a modified unsaturated polyester 15 - 25, initiator of polymerization of 1 to 2, dimethacrylate bis(triethylene glycol)-phthalate 30 - 50, accelerator of polymerization of 3 to 4. table 1. The invention relates to the production of materials for electrical products.Currently known insulating impregnating resins based oligopyrroles in mixtures with unsaturated polyesters, epoxy and silicone resins. Such compounds have a high mechanical, electrical insulating properties, technological and give the ability to automate the processes of impregnation and drying electrical products, and the absence in their composition of solvents makes them more environmentally friendly [1 3]
Closest to the compound according to the invention, its mechanical and electrical insulating characteristics is a compound that includes dimetil-bis-/glycol/phthalate polymethylphenyl siloxane resin, a modified ¢ (CL F), but has several disadvantages that limit its use: high rigidity and fragility, the ability to create significant internal stresses lead to cracking and consequently the destruction of time analizowanie wires. In this regard, this material is recommended for impregnation of products made using wires with a diameter of not less than 0.1 mm in Addition, the compound is slow polymerization (20 to 30 minutes at 125 - 130oC) and a large shrinkage (up to 10%).The purpose of this technical solution is polysinusotomy polymerization of the compound, as well as its elasticity and mechanical strength preserving insulating characteristics under conditions of elevated temperatures and humidity.This problem is solved by the fact that as oligoadenylates fundamentals compound contains a mixture of dimetil-bis-/triethylene glycol/ phthalate with dimetil-bis-/glycol/phthalate in the following ratio, wt.h.Dimetil-bis-/glycol/phthalate 30 50
Dimetil-bis-/triethylene glycol/phthalate 30 50
Polymethylphenyl siloxane resin, a modified unsaturated polyester 15 25
The polymerization initiator 1 the Creel-bis-/glycol/phthalate in a ratio of 50 and 30 wt.h. accordingly, add 25 wt.h. polymethylphenyl siloxane resin-modified unsaturated polyester, 3 wt. including accelerator. After mixing, the product is poured into the container. Before applying the compound administered is 1 wt.h. the initiator paste of benzoyl peroxide in dibutyl phthalate (1:1 ratio).The remaining examples use the same components as in example 1.Example 2. Dimetil-bis-/triethylene glycol/phthalate mixed with dimetil-bis-(ethylene glycol)phthalate in a ratio of 40 and 40 wt.h. add 20 wt.h. polymethylphenyl siloxane resin, 4 wt.h. the accelerator. After mixing, the product is poured into the container. Before applying the compound is administered 2 wt.h. the initiator.Example 3. Dimetil-bis-/triethylene glycol/phthalate mixed with dimetil-bis-/glycol/phthalate in a ratio of 30 and 50 wt.h. accordingly, add 15 wt.h. polymethylphenyl siloxane resin, 3 wt.h. the accelerator. After mixing, the product is poured into the container. Before applying the compound injected 1.5 wt.h. the initiator.Example 4. Dimetil-bis-/triethylene glycol/phthalate mixed with dimetil-bis-/glycol/phthalate in a ratio of 40 and 40 wt.h. accordingly, add 10 wt.h. polymethylphenyl injected 1.5 wt.h. the initiator.Example 5. Dimetil-bis-/triethylene glycol/phthalate mixed with dimetil-bis-/glycol/phthalate in a ratio of 60 and 20 wt.h. accordingly, add 30 wt.h. polymethylphenyl siloxane resin, 3 wt.h. the accelerator. After mixing, the product is poured into the container. Before applying the compound is administered 2 wt.h. the initiator.Example 6. Dimetil-bis-/triethylene glycol/phthalate mixed with dimetil-bis-/glycol/phthalate in a ratio of 20 and 60 wt.h. accordingly, add 20 wt.h. polymethylphenyl siloxane resin, 3 wt.h. the accelerator. After mixing, the product is poured into the container. Before applying the compound is administered 3 wt.h. the initiator.The compounds of examples 1 to 6 contain the following initiators and accelerators.Example 1 the initiator paste of benzoyl peroxide in dibutyl THE 16.504.023-79, accelerator desiccant LCD 12, THE 6-21-0204150-1-90.Example 2 the initiator peroxide dokulil THE 38-402-30-80, accelerator - desiccant LCD 12.Example 3 a paste of benzoyl peroxide accelerator desiccant LCD 1, THE-6-10-1641-77.Example 4 the initiator paste of benzoyl peroxide, accelerator desiccant K-1 (solution of bis-n-butylphthalate cobalt in TGM-3 with a binder content of 2.5%).Eecis of Dicumyl, accelerator-desiccant LCD 1.The test results of the compounds of examples 1 to 6 are presented in the table. Insulating impregnating compound, including dimethacrylate bis(ethylene glycol)-phthalate, polymethylphenyl siloxane resin, a modified unsaturated polyester, and a polymerization initiator, characterized in that it further comprises dimethacrylate bis(triethylene glycol)-phthalate and accelerator in the following ratio, wt.h.Dimethacrylate bis(ethylene glycol)-phthalate 30 50
Polymethylphenyl siloxane resin, a modified unsaturated polyester 15 25
The polymerization initiator 1 2
Dimethacrylate bis(triethylene glycol)-phthalate 30 50
The polymerization accelerator 3 4A
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.
FIELD: insulating materials for telecommunication cables.
SUBSTANCE: polyolefin insulation of conductors in hydrocarbon lubricant filled telecommunication cable which is then placed in junction box operating in the open is susceptible in particular to adverse impact of heat, oxygen, and moisture. In order to ensure reliable functioning of these conductors under mentioned conditions, use can be made of combination of one or more primary phenolic antioxidants chosen from N,N'-hexane-1.6-diilbis-(3(3.5-di-tertiary-butyl-4-hydroxyphenylpropionamide)), tris(3.5-di-tertiary-butyl-4-hydroxybenzyl)isocyanin-rhata, and tris(2-(3.5-di-tertiary-butyl-4-hydroxyhydrocinnamoyloxy)-ethyl)isocyanourate together wit one or more alkyl hydroxyphenyl alkanoylhydrazine metal deactivators.
EFFECT: enhanced oxidation resistance of polyolefin insulation of conductors.
8 cl, 1 tbl, 1 ex