(57) Abstract:The invention relates to the field of electrical engineering, namely, cable technology, and can be used for the manufacture of insulation in different brands of cables, in particular for insulation flexible cables instead of the rubber insulation. Insulating composition comprises, by weight. 'clock, ethylene-propylene-diene rubber 100, polypropylene, or a block copolymer of propylene with ethylene 10-100 peroxide 0,2-4, destructively polypropylene with a melt flow index 100-3000 g/10 min, measured at a temperature of 230oC and a load of 2.16 kg, 3-10, propionic acid, 3,3' - THIOBIS-, dioctadecyl ether of 0.2-0.4, benzoylpropionic acid 3,5-bis (1,1-dimethylethyl(-4-hydroxy-2-[3,5-bis(1,1-dimethylethyl) - 4-hydroxyphenyl]-1-oxopropyl]hydrazide of 0.2-0.4, benzoylpropionic acid 3,5-bis ( 1,1-dimethylethyl)-4-hydroxy-, 2,2-bis[[ 3-[3,5-bis( 1,1-dimethylethyl)-4-hydroxy-phenyl]-1-oxopropoxy] methyl] -1,3-propanediylbis ether 0.07 to 0.15, and three -(2,4-di - tertbutylphenol)postit 0.15 to 0.3. The technical result is to improve the processing characteristics of the composition for insulation of wires and cables, its effective protection against thermal oxidation and the effects of copper, which improves the quality of the final product. table 2.
Ethylene-propylene-diene rubber - 100
Polypropylene or block copolymers of propylene with ethylene - 10-100
Peroxide with a half-life of 2 to 20 minutes at a temperature of 170oC - 0,2-4,0
Destructively polypropylene with a melt flow index 100-3000 g/10 min, measured at a temperature of 230oC and a load of 2.16 kg - 3-10
Propionic acid, 3,3'-THIOBIS-, dioctadecyl ether - 0,2-0,4
Benzoylpropionic acid 3,5-bis(1,1-dimethylethyl)-4-hydroxy-,2- [3-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]-1-oxopropyl]hydrazide - 0,2-0,4
Benzoylpropionic acid 3,5-bis(1,1-dimethylethyl)-4-hydroxy-, 2,2-bis[[3-[3,5-bis(1,1-dimethylethyl)-4-hydroxy-phenyl] -1-oxopropoxy] methyl]-propanediylbis ether - 0,07-0,15 the first polypropylene. Such polypropylene is produced beforehand by mechanochemical degradation of polypropylene with a MFR of 0.3 to 30 g/10 min in a mixer of the type Bunbury or on single - or twin-screw extruders in the presence of 0.1 to 3.0 wt.% peroxide at a temperature of 150-190oC for 5-30 minutes After this treatment, the TPP increases to 100-3000 g/10 min.The composition uses the following stabilizers.A)
< / BR>propionic acid, 3,3'-THIOBIS-, dioctadecyl ester,
Mol. weight 683, white powder with a melting point 63-66oC. Manufactured by a company Ciba, Switzerland, under the trade name Irganox PS 802.B)
< / BR>benzoylpropionic acid, 3,5-bis(1,1-dimethylethyl)-4 - hydroxy-,2-[3-[3,5-bis(1,1-dimethylether)-4-hydroxyphenyl]-1 - oxopropyl]hydrazide.Mol. weight 553, white powder with a melting point 224-229oC. Manufactured by a company Ciba, Switzerland, under the trade name Irganox MD 1024.IN)
< / BR>benzoylpropionic acid, 3,5-bis(1,1-dimethylethyl)-4 - hydroxy-,2,2-bis[[3-[3,5-bis(1,1-dimethylethyl)-4-hydroxy - phenyl]-1-oxopropoxy]methyl]-1,3-propanediylbis ether.Mol. weight 1178, white powder with a melting point 110-125oC. Manufactured by a company Ciba, Switzerland, under the trade name Irganox 1010.
oC. Manufactured by a company Ciba, Switzerland, under the trademark Irgafos 168.This composition may contain ethylene-propylene-diene rubber obtained by copolymerization of ethylene, propylene and diene, for example, marks Sept-30, Sept-40 or SKEPT-50, polypropylene, for example, the brand 01030 or block copolymers of propylene with ethylene, for example, the brand 02035.Rubber, SKEPT is produced by JSC "bashneftechem" beyond 38.103252-92. Polypropylene and copolymers of propylene with ethylene manufactured by JSC bashneftechem" beyond 2211-020-00203521-96.The composition according to the invention can be processed on standard equipment used for this purpose in cable production.The following example illustrates but does not limit the invention.Example.Compositions for laboratory tests made by mixing the components in the mill at a temperature of 170oC for 10-15 minutes Beforehand using a laboratory mixer get destructively polypropylene by mixing polypropylene with MFR: 3.0 dicumylperoxide (concentration of 2 wt.%) at a temperature of 170-180oC for 15-20 minutes has been Removed from the rolls in the form of cloth, the mixture is pulverized using a knife to the edge of the 1. Test method
1.1 Resistance of the composition to heat ageing appreciate the change of physico-mechanical properties (tensile strength and elongation at break) after exposure to a temperature of 136oC for 10 days. According to the requirements of electrical insulating compositions, this indicator should be within 25%.1.2 Resistance to heat aging in the presence of copper estimated on the same data, but the test specimens to temperature effects (136oC, 10 days) are in direct contact with the copper plate (foil).According to the requirements of electrical insulating compositions, this indicator should be within 25%.1.3 Technological characteristics of the compositions evaluated for melt flow index, measured at a temperature of 230oC and a load of 2.16 kg, and immediately upon isolation of the copper wires with a diameter of 0.6 mm, the insulation thickness of 0.4-0.5 mm, extrusion lines. Evaluate the surface quality (roughness).2. The results are given in table 2.Test results show that use of the composition 6 high MFR (MFR value, providing satisfactory technological characteristics when applying insulation shall be not less than 0.2). The roughened surface of the insulation. In addition, the composition has a low resistance to aging, especially in the presence of copper. Track 7 (control) contains a stabilizing system according to the invention, which provides resistance to aging, including and in contact with copper, corresponding to the requirements for insulating compositions. However, the technological characteristics of the composition (PTR, surface quality insulation) is unsatisfactory.Composition 8 (control) contains destructively polypropylene according to the invention, which provides a satisfactory technological properties, however, the absence of a stabilizing system stabilizer Irganox MD 1024 leads to a low aging resistance of the composition in the presence of copper (changing the strength at break of 70%, the change in the relative elongation of 80%). The absence of a stabilizing system stabilizer Irganox PS 802 (composition 9, the control also leads to poor aging resistance. Use as insulation compositions 1-5, characterized by a content of a component of the practical characteristics. Insulation on all indicators meet the requirements for insulating compositions. Insulating composition containing the ethylene-propylenediene rubber, polypropylene or block copolymers of propylene with ethylene, peroxide with a half-life of 2 to 20 minutes at a temperature of 170oC, characterized in that it further comprises destructively polypropylene with a melt flow index of 100 to 3000 g/10 min, measured at a temperature of 230oC and a load of 2.16 kg, and a stabilizing system comprising propionic acid, 3,3' - THIOBIS-, dioctadecyl ether, benzoylpropionic acid, 3,5-bis (1,1-dimethylethyl)-4-hydroxy-2-[3-[3,5-bis(1,1-dimethylethyl) - 4-hydroxyphenyl] -1-oxopropyl] hydrazide, benzoylpropionic acid, 3,5-bis (1,1-dimethylethyl)-4-hydroxy-2,2 bis[[3-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]-1-oxopropoxy]methyl]-1,3-propanediylbis ether and three -(2,4-ditertbutyl)postit in the following ratio, wt.h:
Ethylene-propylene-diene rubber - 100
Polypropylene or block copolymers of propylene with ethylene - 10 - 100
Peroxide with a half-life of 2 to 20 minutes at a temperature of 170oC - 0,2 - 4
Destructively polypropylene with the index t is acid, 3-3'-THIOBIS-, dioctadecyl ether - 0,2 - 0,4
Benzoylpropionic acid, 3,5-bis (1,1-dimethylethyl)-4-hydroxy-,2-[3-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]-1-oxopropyl]hydrazide - 0,2 - 0,4
Benzoylpropionic acid, 3,5-bis(1,1-dimethylethyl)-4-hydroxy-2,2-bis[[3-[3,5-bis(1,1-dimethylethyl)-4-hydroxy-phenyl-1-oxopropoxy] methyl] -1,3 propanediylbis ether - 0,07 - 0,15
Three-(2,4-di-tertbutylphenol)postit - 0,15 - 0,3
FIELD: preparation of compositions for cables filling.
SUBSTANCE: the invention is pertaining to preparation of compositions for filling the cables used in the field of a distant data transmission. Prepare a composition containing (in mass %): a mineral or a synthetic oil - 70-90, the hydrogenated block of styrene and butadiene copolymer with radial structure - 2-15, polyethylene wax - up to 12. The block of the copolymer can be synthesized using silicon tetrachloride or stannic chloride. The technical result of the invention consists in improvement of the index of compositions drops-protection and a stability augmentation.
EFFECT: the invention ensures improvement of the index of compositions drops-protection and a stability augmentation.
7 cl, 2 tbl, 3 ex
FIELD: polymer materials.
SUBSTANCE: invention relates to conducting polymer blend, which is prepared by selecting at least two mutually immiscible polymers and mixing them until into blend so that at least one of polymers forms continuous three-dimensional phase throughout the volume of blend. Thereafter, conducting metal-containing filler is added to blend. Difference in surface tensions between polymer(s) forming continuous three-dimensional phase and other polymers constituting polymer blend is equal at least 2 mN/m. Above-mentioned at least two polymers are selected from following polymer pairs: pair polyamide PA6 and polymer selected from group consisting of PA12 and polyolefin; pair PA66 and polymer selected from group consisting of PA6, polymethylmethacrylate, polycarbonate, polyethylene terephthalate, styrene/acrylonitrile copolymer, polystyrene, PA12, polyolefin, liquid-crystalline polymer, and polyoxymethylene; pair polybutylene terephthalate and polymer selected from group consisting of PA6, polymethylmethacrylate, polycarbonate, styrene/acrylonitrile copolymer, polyethylene terephthalate, polystyrene, PA12, polyolefin, liquid-crystalline polymer, and polyoxymethylene; pair polycarbonate and polymethylmethacrylate; pair polyethylene terephthalate and polymer selected from group consisting of polycarbonate, polymethylmethacrylate, polystyrene, PA6, PA12, and polyolefin; pair polymethylmethacrylate and polymer selected from group consisting of PA6, PA12, and polyolefin; pair polyoxymethylene and polymer selected from group consisting of polycarbonate, polymethylmethacrylate, polystyrene, PA6, PA12, and polyolefin; pair styrene/acrylonitrile copolymer and polymer selected from group consisting of polystyrene, PA6, PA12, and polyolefin.
EFFECT: enabled preparation of polymer blend with low content of conducting filler showing sufficient conductivity and good mechanical properties.
8 cl, 2 dwg, 4 tbl, 2 ex
FIELD: electric insulating materials; synthetic resins or glass fiber laminates for producing binders of laminated plastics used, for instance, as insulation for low-voltage equipment.
SUBSTANCE: main drawback of prior-art binders is difficulty to predict, and in some cases to reproduce, curing and molding conditions. As a result, binder leak-out and its heavy loss, as well as flaws on glass fiber laminate surface may occur in the course of molding. Proposed binder for glass fiber laminate has ingredients and their proportion, as follows, mass percent: resol resin, 12-16; novolac resin CF-010, 2-16; epoxy resin, 12-16; n-tertiary butyl-phenol-formaldehyde resin 101L or 101K, 0.5-15; alcohol-toluene mixture (1 : 1), 40-50.
EFFECT: reduced leakage of binder in the course of molding, eliminated flaws on glass fiber laminate surface.
1 cl, 1 dwg, 1 tbl, 4 ex
FIELD: electric insulating varnishes for impregnating windings of electrical machines and apparatuses.
SUBSTANCE: used in proposed Class F (155 °C) insulating varnish are epoxy-dian resin with epoxy group mass fraction of 16-18% and low-butane melamine-formaldehyde resin, as cross-linking agents, as well as tetrabutoxytitanium and 2-methylimidazole based complex at temperature of 140 °C, as curing catalysts. Varnish solvents are xylene and cyclohexanon. Proposed compounding of varnish implies use of raw materials taken in following proportion, part by mass: hydroxyl-containing oligoester, 37-44; epoxy-dian resin, 17.9-19.0; low-butane melamine-formaldehyde resin, 17.9-19.0; 2-methylimidazole, 0.09-0.1; tetrabutoxytitanium, 0.41-0.43; cyclohexanon, 0.42-0.56; xylene, 14-16.
EFFECT: reduced cost, enhanced availability and relative safety of cross-linking agents, enhanced fraction of nonvolatile materials, viability, and cementing capacity of varnish.
1 cl, 2 tbl, 9 ex
SUBSTANCE: invention relates to cable engineering, in particular - to polymer compositions based on plastified polyvinylchloride (PVC) with reduced flammability, reduced hydrogen chloride release during burning, improved physicochemical properties which compositions are intended for insulation of inner and outer sheaths of wire and cable operated under increased fire hazard conditions. The electrically insulating composition contains PVC plasticate (85-90 wt %) and organoclay (5-15 wt %). The organoclay is represented by montmorillonite modified with carbamide or melamine at the following components ratio: montmorillonite - 80-95, carbamide or melamine - 5-20.
EFFECT: invention allows to improve environmental friendliness of the process and PVC plasticate physical and mechanical properties.
2 cl, 5 dwg
SUBSTANCE: composition for fixing wrapping articles contains A) 1-60 wt % of at lest one resin of α,β-unsaturated polyether based on at least one unsaturated mono-, di- or tricarboxylic acid and/or substance containing molecules with mono-, di- or tricarboxylic acid groups, at least one polyol, B) 0.1-80 wt % of at least one inorganic and/or an organic-inorganic hybrid component, having functional groups for reaction with components A) and C), where said hybrid components are polymers or colloidal solutions based on silicon, titanium or zirconium and oxygen atoms, which contain hydroxyl and/or alkoxy groups and/or hydroxyalkyloxy groups and/or organic fragments, which have epoxy and/or isocyanate and/or unsaturated groups, C) 2-80 wt % of at least one monomer and/or oligomeric unsaturated component, which is styrene, vinyl toluene, hexanediol dimethacrylate, butanediol dimethacrylate and/or (meth)acrylates of products of a polyaddition reaction of ethylene oxide with trimethylolpropane capable of reaction with components A and B, and D) 0-15 wt % conventional additives, where wt % is calculated relative the total weight of the composition.
EFFECT: excellent heat conductivity properties and high level of electrical insulation along with excellent adhesion and thermal stability.
6 cl, 1 tbl, 2 ex
FIELD: electrical engineering.
SUBSTANCE: proposed is a method for manufacture of insulation for a thermal lithium current source by way of pressing thermally insulating gaskets of a composition including finely dispersed silicon oxide with specific particle surface over 250 m/g, chrome oxide, ultrathin silica fibres and phenolformaldehyde resin.
EFFECT: thermal insulation manufacture method enables fabrication of thermally insulating gaskets with heat conductivity inferior to that still air and with high mechanical strength preventing destruction under impact loads, thus ensuring rigidity of the whole current source structure.
SUBSTANCE: invention relates to a curable sealing resin composition. The curable composition contains at least one anhydride-functionalised polymer in amount of 30-60 wt %, a polyol in amount of 10-25 wt %, an epoxide-functionalised polymer, oligomer or monomer in amount of 15-40 wt %, a urethane polyol-functionalised compound selected from a group consisting of urethane diol, polyurethane diol and combination thereof in amount of 5-15 wt % and a catalyst with respect to total weight of the resin. The resin composition can be cured at room temperature. Components used to prepare and cure the resin composition can be provided in form of two or more parts.
EFFECT: hydrolytic stability, high hardness, flexibility and low cost of production of the sealing resin which can be used to restore insulation and/or for environmental protection of cable joints, sealed articles etc.
13 cl, 4 tbl, 3 ex
SUBSTANCE: invention relates to crosslinkable compositions based on polyolefins and copolymers thereof and modifiers for producing silanol-crosslinkable polymer compositions which can be used to produce film coatings, insulation and sheaths for cables and conductors for different purposes. The silanol-crosslinkable composition contains polyolefin, vinyl alkoxysilane, organic peroxide and a sheet silicate which is modified with resorcinol resin with ratio of the resorcinol resin to the sheet silicate of 6:10 pts.wt.
EFFECT: improved operational characteristics, shorter crosslinking time and longer property retention time.
6 cl, 2 tbl
FIELD: machine building.
SUBSTANCE: invention relates to insulation tape used, primarily, at conveyor belts in production of plastic bags and including insulation cord, film of complex polyether coated on both sides with cellulosed layer and layer of insulation material arranged on at least one of flat sides. Note here that insulation material comprises lacquer and additive including silicic acid and polyether-wax.
EFFECT: improved tape surface roughness.
2 cl, 1 dwg
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
FIELD: cable industry.
SUBSTANCE: proposed composition designed for insulating and sheathing cables and wires meant for operation under high fire hazard conditions incorporates following ingredients, parts by weight: suspension polyvinyl chloride, 100; ester plasticizer, 30 - 70; tribasic lead sulfate, 2 - 6; calcium carbonate, 20 - 300; zinc oxide, 0.5 - 10; aluminum oxide trihydrate, 20 - 70; antimony trioxide, 3 - 8; zinc borate, 0.5 - 8; zinc stearate, 0.25 - 4. Zinc borate and stearate introduced in definite proportion into proposed composition have made it possible to improve fire-safety characteristics of the latter.
EFFECT: reduced emission of smoke and hydrogen chloride in burning, enhanced degree of inflammability.
1 cl, 1 tbl
FIELD: electrical engineering.
SUBSTANCE: proposed polymeric insulating composition given in description of invention together with description of cables and wires covered with such composition to ensure their excellent performance in service has 60 to 90 mass percent of copolymer A of ethylene and α-olefin produced by copolymerization with aid of concentric catalyst and 40 to 10 mass percent of polyolefin resin B other than copolymer A and includes polyolefin incorporating grafted substituents with dipole moment 4 D or higher. One of alternative compositions uses semiconducting composition as semiconductor layer. In particular cases ethylene and α-olefin copolymer is produced by polymerization with aid of Ziegler-Natta catalyst.
EFFECT: facilitated production.
8 cl, 2 tbl
FIELD: cable industry.
SUBSTANCE: proposed composition designed for insulating general industrial cable and wire sheaths to reduce fire occurrences due to inflammation of cables and wires has following ingredients, mass percent: polyvinyl chloride suspension, 100; ester plasticizer, 25 - 75; lead stabilizer, 1 - 7; calcium stearate, 0.7 - 3; diphenylolpropane, 0.1 - 0.8; zinc oxide, 0.5 - 8; zinc borate, 0.5 - 5; calcium chloride, 0.1 - 2 or calcium oxide, 0.1 - 2; calcium carbonate, 5 - 90; antimony trioxide, 0.5 - 9; and carbon black, 1 - 8.
EFFECT: reduced inflammability and smoke-forming capacity due to introduction of zinc oxide, zinc borate, and calcium chloride or calcium oxide.
3 cl, 1 tbl
FIELD: cable industry.
SUBSTANCE: proposed composition designed for insulating sheaths of cables and wires operating under high fire hazard conditions has following proportion of ingredients, part by mass: suspension polyvinyl chloride, 100; ester plasticizer, 35 - 65; lead stabilizer, 2 - 7; calcium carbonate, 5 - 45; aluminum oxide trihydrate, 20 - 100; antimony trioxide, 5 - 9; zinc oxide, 0.5 - 8; and newly introduced zinc borate, 0.5 - 8; calcium stearate, 1 - 3; calcium chloride, 0.1 - 2 or calcium oxide, 0.1 - 2.
EFFECT: enhanced fire resistance at low degree of smoke emission under fire conditions.
1 cl, 1 tbl
FIELD: electrical communication components; cables whose conductors are covered with polymeric insulation extruded about conductor.
SUBSTANCE: proposed cable has its conductors covered with insulation that has at least one component incorporating maximum 20, and best of all 15, mass percent of polymer characterized in high degree of extrudate swelling. This polymer is defined as that characterized in extrudate swelling degree over 55% and higher, best of all that having extrudate swelling degree over 65%. Best insulation has at least second component of high degree of cracking resistance under stress; therefore, minimal combination of these polymers will provide for insulation layer possessing unique combination of physical properties, including high degree of foaming, fine uniform cellular structure, reduced attenuation, and cracking resistance under stress which is capable of sustaining temperature of 100 °C over 100 h without cracking in spirally coiled state at stress level one-fold higher than outer diameter of insulation.
EFFECT: improved electrical characteristics and mechanical strength of insulation.
23 cl, 6 dwg, 3 tbl
FIELD: insulation materials.
SUBSTANCE: invention relates to polyethylene composition for insulation of conductors and cables, which exhibits improved scorching resistance and consists of (i) polyethylene and scorching inhibitor having melting point under atmospheric pressure below 50°C and being compound depicted by general formula I, wherein R1 represents optionally phenyl-substituted С1-С20-alkyl, С2-С20-alkenyl, С3-С20-alkynyl, С3-С9-cycloalkyl, phenyl, or tolyl; R2 and R3, independently from each other, represent С1-С20-alkyl optionally substituted by following substituents: phenyl, one or two hydroxyls, cyano group, formyl, acetyl, and -O-COR5; R5 represents С1-С20-alkyl, С2-С20-alkenyl, С3-С20-alkynyl, or optionally hydroxyl-substituted С3-С9-cycloalkyl; phenyl, 4-chlorophenyl, 2-methoxycarbonylphenyl, p-tolyl, 1,3-benzothiazol-2-yl, -(CHR6)nCOOR7, or -(CHR6)nCONR8R9, wherein n=1 or 2, R6 represents hydrogen atom or С1-С6-alkyl; R7 С1-С20-alkyl optionally interrupted with 1-5 O or S atoms, С5-С7-cycloalkyl, phenyl, benzyl, or tolyl; R8 and R9 each represents hydrogen atom or С1-С6-alkyl; R4 represents hydrogen atom or methyl; and (ii) organic peroxide. Composition may be extruded with minimum preliminary cross-linking, even at sufficient cross-linking rate. Polyethylene composition for insulation of conductors and cables with improved scorching resistance is described, which composition additionally contains an amine selected from group consisting of diphenylamine, 4-tert-butyldiphenylamine, 4-tert-octyldiphenylamine, 4,4'-di-tert-butyldiphenylamine, 2,4,4'-tris-tert-butyldiphenylamine, 4-tert-butyl-4'-tert-octyldiphenylamine, o,o', m,m'- or p,p'-di-tert-octyldiphenylamine, 2,4-di-tert-butyl-4'-tert-octyldiphenylamine, 4.4'-di-tert-octyldiphenylamine, 2,4-di-tert-octyl-4'-tert-butyldiphenylamine. This composition may be extruded with minimum preliminary cross-linking, even at sufficient cross-linking rate. Method for preparing cross-linked polyethylene composition is also disclosed. (I).
EFFECT: enhanced resistance against preliminary vulcanization at simultaneously preserved satisfactory vulcanization rate and density of cross linkages formed.
3 cl, 5 tbl