Electroconductive polymer composition

FIELD: chemistry.

SUBSTANCE: composition contains polyolefin, carbon black with volume resistivity ρ= 10±6 Ohm⋅cm at content in the polymer base, carbon black with volume resistivity ρ= 5±3 Ohm⋅cm at content in the polymer, 4,4'-tiabis(6-tert-butyl-m-cresol),tetra-bis-methylene- (3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate), 3,5-bis(1,1-dimethylethyl)-4-hydroxy-2-[3- [3,5-bis(1,1-dimetietil)-4-hydroxyphenyl]-1-oxopropyl] hydrazide of benzopropione acid, zinc stearate, polyethylene wax and magnesium hydroxide.

EFFECT: preservation of mechanical and electrical properties of conductive coating, as well as high mechanical strength and low flammability.

2 tbl, 5 ex



Same patents:

FIELD: electricity.

SUBSTANCE: composition of electrolyte includes salt of electrolyte and a solvent, where lithium salt of dodecylbenzene sulphonic acid is contained as salt of electrolyte in the amount of 25-55 wt % and water 75-45 wt % is contained as a solvent, or sodium salt of dodecylbenzene sulphonic acid in the amount of 70-88 wt % and water 30-12 wt %. Use of affordable anionic surface-active substances makes the proposed ionic liquid-crystalline electrolytes economically attractive.

EFFECT: obtaining an electrolyte with high specific conductivity at availability of a well-ordered inner structure and preservation of flowability.

2 dwg, 2 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a product, namely to a power cable, which includes a semiconductor layer, containing a semiconductor polyolefin composition. The composition contains graphene nanoplates, where the average thickness of the graphene nanoplates is in the range from 1 nm to 50 nm, and their side diameter constitutes 200 mcm or less, and olefin polymer resin of the base. The composition for the power cable can additionally contain solid electroconductive filler, different from the graphene nanoplates. The application of the semiconductor polyolefin composition in the semiconductor layer of the power cable is also described. Improvement of electrical exploitation characteristics in the process of annealing at temperatures lower than the temperature of the polymer melting and the temperature dependence of specific volume resistance in comparison to the one that has place for the respective semiconductor polyolefin compositions based on carbon soot.

EFFECT: roughness of the surface of the semiconductor polyolefin composition for extruded samples constitutes 100 mcm and less.

14 cl 7 dwg, 2 tbl

FIELD: chemistry.

SUBSTANCE: method includes introduction of copper formiate into ethylenepropylene rubber and further high-speed thermal decomposition of copper formiate in rubber. Process of copper formiate decomposition in rubber is realised in presence of SAS. In addition, technical carbon and vulcanising group, including zinc oxide and peroxide, is additionally introduced into composition formulation.

EFFECT: compositions, obtained on the base of ethylenepropylene rubber, possess higher electroconductive and strength characteristics and are applied to obtain electroconductive elastomer and technical rubber products.

1 tbl, 1 ex

FIELD: electricity.

SUBSTANCE: method of obtaining of contact wires from copper-based alloys includes adding to copper melt of transition metal and phosphorus for obtaining the copper-based alloy containing 0.1-0.3 wt % nickel phosphide or cobalt phosphide of stoichiometric composition, feeding of the alloy into a crystalliser, alloy crystallisation as a section, rolling of the named section directly after crystallisation to the rod iron in the conditions providing hardening of an alloy, aging at 400-500°C and the subsequent forming of the electric contact wire.

EFFECT: improvement of strength properties of wires due to alloying of Ni and Co phosphides of forming quasibinary cuts on the state charts with copper and better than iron soluble in copper and having smaller affinity to oxygen.

7 cl, 1 tbl

FIELD: chemistry.

SUBSTANCE: aluminium paste for silicon solar cells includes particles of aluminium powder, an organic binding agent and glass-frit, and in the paste applied is finely-dispersed aluminium powder, particles of which have a spherical form, and with the application of a combination of aluminium powders with an average size of particles D50 not more than 3.0 mcm and 4.0-6.0 mcm in a ratio of (10:50):(90:50) respectively, with the following component ratio, in wt %: aluminium powder 70-80; organic binding agent 15-30; glass-frit 0-5. As glass-frit a mixture of bismuthate and lead-borosilicate glass with an average size of particles D50 not larger than 10.0 mcm, predominantly 2.0-3.0 mcm, can be applied. The paste can contain metalorganic compounds and/or siliconorganic compounds and/or copolymer in a quantity of 0-2 wt %. The paste can contain nanoparticles of amorphous silicon dioxide, with the size not more than 200 nm and specific surface 100-400 m2/g in a quantity of 0-2 wt %.

EFFECT: increase of short-circuit current, reduction of successive resistance of the solar cell, which leads to an increase of the efficiency factor, reduction of expenditures for the paste and solar cell production.

4 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to particles of zinc oxide, increasing heat conductivity or electric conductivity. The particles are represented by the following formula (1): ZnMn+xO1+nx/2 · aH2O (1), where Mn+ stands for a trivalent or tetravalent metal, x and a satisfy the ratio 0.002<x<0.05 and 0≤a<0.5, respectively, n stands for metal valence. The particles are characterised by a content of columnar particles 80% or higher. Also claimed are: method of obtaining the zinc oxide particles, burnt particles (A) and (B), resin compositions (A) and (B).

EFFECT: invention makes it possible to obtain the zinc oxide particles, used for an improvement of electric conductivity or heat conductivity of resins.

13 cl, 12 dwg, 5 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of applying a coating composition containing carbon in form of carbon nanotubes, graphenes, fullerenes or mixtures thereof and metal particles on a substrate, followed by treatment under pressure and heat treatment of the coating after application on the substrate. The invention also relates to a substrate obtained using the disclosed method and use thereof as an electrochemical structural element.

EFFECT: invention provides low mechanical wear, low frictional coefficient and good electrical conductivity of the coating.

30 cl, 2 ex, 4 dwg

FIELD: chemistry.

SUBSTANCE: electroconductive heat-resistant phosphate composite material contains aluminophosphate binder, filler in form of a mixture of aluminium oxide and aluminium nitride and a modifying additive in form of carbon nanotubes, with the following ratio of components of the composite material, wt %: aluminophosphate binder - 14-16, carbon nanotubes - 0.5-2, filler (Al2O3-AlN) - the balance.

EFFECT: invention reduces volume resistivity of the composite material while maintaining high strength and heat resistance.

1 tbl

FIELD: construction.

SUBSTANCE: invention relates to conductive material for flooring, comprising electroconductive anti-deformation layer, which includes conductive fibres, comprising glass fibres and carbon fibres, and to the method of its preparation. Conductivematerial applied not only in the form of blocks, but also in the form of long sheets, is suggested in the present invention due to the fact that the conductive fibres include glass fibres and carbon fibres, besides the content of carbon fibres is from 3 weight parts to 30 weight parts per 100 weight parts of glass fibres.

EFFECT: not only excellent electrical conductivity, but also stable anti-deformation properties are provided.

14 cl, 1 dwg, 2 tbl

FIELD: electricity.

SUBSTANCE: invention refers to electrical engineering, particularly to methods of conductive layer formation used in wide range of technics, including electronics or electrical equipment, and can be applied to form conductive links in microcircuits. Method of conductive layer formation on carbon nanotube base involves application of suspension of carbon nanotubes and carboxymethyl cellulose in water onto substrate, with the following component ratio, wt %: carboxymethyl cellulose 1-10, carbon nanotubes 1-10, drying at 20 to 150°C, pyrolysis at temperature over 250°C.

EFFECT: enhanced electric conductivity of layers formed.

4 cl, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to thermoplastic elastomeric compositions. A dynamically vulcanisable alloy includes: a) at least one elastomer containing isobutylene; b) at least one thermoplastic resin, c) an anhydride-functionalised oligomer, wherein before functionalisation, the oligomer has molecular weight in the range of 750-1250, and d) a plasticiser which is selected from a group which includes tertiary amines, secondary diamines and sulphonamides, wherein the anhydride-functionalised oligomer and plasticiser are present in a ratio of 0.15-3.0, the elastomer is present in a dispersed phase in the form of fine vulcanised or partially vulcanised particles in the continuous phase of the thermoplastic resin.

EFFECT: alloy retains high Shore hardness A and acquires improved fluidity necessary for treatment.

12 cl, 4 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a water polymer dispersion for the application as an additive for compositions, which contain a hydraulic binding substance or a binding substance with latent hydraulic properties, a multi-component composition for obtaining binding solutions, mortars or cement, a hardened composition for the application in civil engineering construction or building construction, to the said building constructions, as well as to the application of the said water polymer dispersion. The water polymer dispersion contains a) dispersed copolymer, consisting of at least two monomers, selected from the group, consisting of ethylene, propylene, butylenes, isoprene, butadiene, styrene, acrylnitrile, acrylic acid, metacrylic acid, alkylacrylate, alkylmetacrylate, vinyl ether and vinyl chloride, b) comb-like polymer, which has side chains, bound with the main chain by means of ether or ester groups and c) water.

EFFECT: obtaining the water polymer dispersion for the addition in hydraulic and possessing latent hydraulic properties binding substances, which makes it possible to achieve an increase of mechanical properties of the said substances and reduce porosity and water absorption by the said substances.

9 cl, 4 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: method includes dry mechanical crushing of a cellulose-containing raw material by known methods, preliminary processing of the material pile by electromagnetic waves of a decimetre range for 30-300 s with the maximal pile size not larger than 20 cm, an initial polymer water humidity from 8% to 40% and specific consumption of radiated power from 0.5 W/g to 1.5 W/g.

EFFECT: reduction of energy consumption for obtaining a dispersed natural material, obtaining the less thermally destructible dispersed natural material.

1 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: invention relates to an oxygen impermeable polyolefin composition for use in making food packaging. The composition contains polyolefin, whose composition includes a copolymer of ethylene with a vinyl alcohol containing 27-44 mol % ethylene links, an active oxygen absorbent, a miscibility enhancing additive, as well as clay or a nucleating agent or a polyamide, optionally including said clay or nucleating agent. The clay has characteristic ratio of at least 10.

EFFECT: combining components in a defined ratio enables to obtain compositions with unexpectedly good properties as an oxygen barrier.

13 cl, 2 dwg, 3 tbl, 10 ex

FIELD: chemistry.

SUBSTANCE: polymer composition contains a mixture of (i) a polymer selected from polyethylene, polypropylene, polystyrene, polyvinyl chloride or a mixture thereof (ii) cellulose, (iii) ammonium nitrate, (iv) nutrients selected from blue-green algae and/or yeast, and (v) water. This composition can be mixed with a pure base polymer to obtain a polymer master batch. The master batch of the composition can be mixed with a pure base polymer which is suitable for obtaining products which are biodegradable. Described also is a method of preparing a biodegradable polymer composition, a method of preparing a master batch of the biodegradable polymer composition.

EFFECT: biodegradation of the composition within 6 to 36 months, environmental safety, preparation of the biodegradable composition does not require special equipment.

15 cl, 27 ex

FIELD: chemistry.

SUBSTANCE: composition contains a catalytic compound, an activator, optional support and liquid solvent, and a hydroxy carboxylate addition salt of a metal , where Rf denotes hydrogen, halogen or C1-6 alkyl. The polymer composition contains a product of polymerisation of one or more olefin monomers in the presence of a catalyst composition, wherein the hydroxy carboxylate addition salt of a metal is or , where Rc denotes hydrogen, halogen or C1-6 alkyl.

EFFECT: possibility of implementing a continuous technique with improved operational capabilities of the reactor while obtaining novel improved polymers, reduced tendency for contamination, formation of a polymer film and longer operating life.

7 cl, 1 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: polymer composite has a layered structure formed by layers of a polymer with nanosized thickness between layers of antipyrene-modified bentonite. The bentonite composition contains not less than 70-72% montmorillonite, with content of the latter in the composite not less than 5 vol. %.

EFFECT: composite is relatively cheap and has high fire-resistance.

2 cl, 2 dwg, 1 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of polymerising olefin(s) to obtain polymers with improved film turbidity in the presence of cyclotetramethylene silyl (tetramethylcyclopentadienyl)(cyclopentadienyl) zirconium dimethyl, activated with an activator, on a support. Also disclosed is a method of improving polymer film turbidity comprising the following steps: a) obtaining a polymer via polymerisation of ethylene, olefin monomer containing 3-8 carbon atoms, and optionally one or more other olefin monomers containing 2-30 carbon atoms, in the presence of a catalyst system - metallocene, LA(R'SiR')LBZrQ2, activated with an activator deposited on a support; b) mixing the polymer obtained at step (a) with another polymer containing olefin monomers containing 2-30 carbon atoms.

EFFECT: methods enable to obtain polymers with improved properties, particularly improved processability and film turbidity.

17 cl, 5 dwg, 8 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: composition contains a polyolefin, sterically hindered phenol of the following formula: where groups X, which can be identical or different, have the following formula: where R1 and R4, which can be identical or different, are an alkyl group having from 1 to 8 carbon atoms; R2, R3, R5, and R6, which can be identical or different, are hydrogen or an alkyl group having from 1 to 8 carbon atoms, a hydrotalcite and/or bis(2,4-dicumylphenyl)pentaerythritol diphosphite. The disclosed polymer composition exhibits efficient metal deactivation and can therefore be used to make objects in contact with metals which cause decomposition.

EFFECT: high resistance to decomposition under the action of a metal.

25 cl, 2 tbl, 7 ex

FIELD: physics.

SUBSTANCE: composition contains 68-82 wt % polyolefin, 8-32 wt % polyhydroxybutyrate and 5-10 wt % ketone (co)polymer.

EFFECT: composition has sufficient processability, is not toxic for the body, is environmentally safe and is highly biodegradable in ambient conditions.

1 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a composition which includes at least one polymer P with silane functional groups and 20-60 wt % aluminium hydroxide or magnesium hydroxide or a mixture thereof, wherein the composition is characterised by viscosity of 500-20000 mPa·s, measured according to DIN 53018 at 20°C.

EFFECT: composition is suitable as a liquid film and is characterised by very good fire-resistance properties, ie, it is difficult to ignite and is self-extinguishing.

14 cl, 2 tbl