High-strength waterproof organocomposite and preparation method thereof

FIELD: manufacturing technology.

SUBSTANCE: invention relates to production of light-weight high-strength water-resistant organocomposites based on fibrous fillers of ultrahigh molecular weight polyethylene (UHMWPE) and polymer binder and can be used in elements of structures in various engineering fields: aviation, machine-shipbuilding, chemical and defense, etc. Disclosed is a high-strength waterproof organocomposite made of fibrous filler based on high-strength high-modulus multi-filament polyethylene fibres and polymer binder based on epoxy resin with amine curing agent. Surface of filler is pretreated in barrier discharge plasma with impact of pulse barrier discharge in air at atmospheric pressure when exposed to alternating voltage with frequency of 10-50 kHz, with specific power of discharge of 50-500 W/m2, at rate of treatment of 0.3-7 m/min. Method then comprises treatment with acetone of a solution suspensions metal-containing nanostructures in carbon-polymer media. Filler is then dried, impregnated with polymer binder prepared by mechanical mixing of components, and organic composite is moulded with hardening temperature not higher than 75 °C. As epoxy resin of polymer binder, organocomposite contains a mixture of epoxy-diane (A) and epoxy-aliphatic (B) oligomers in ratio A:B from 10:1.3 to 10:3. As amine curing agent - eutectic mixture of metaphenylenediamine (MPDA) and 4,4′-diaminodiphenylmethane (4,4′-DADPM) at following weight ratio from 22:78 to 78:22; and additionally contains a mixture of oligoester-cyclocarbonates, urethane prepolymer. Ratio of components in organocomposite, pts.wt: fibre filler - 250-700; epoxy-diane oligomer (A) - 100; epoxy-aliphatic oligomer (B) - 13-30; mixture of oligoester-cyclocarbonates - 10-20; urethane prepolymer - 5-25; eutectic mixture MPDA + 4,4′-DADPM - 28-45.

EFFECT: invention improves physical and mechanical properties and water resistance of organic composite while providing environmental friendliness and simple process during implementation of industrial production.

7 cl, 1 dwg, 3 tbl, 6 ex

 



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to the technology of production of polymer fibres, in particular, polypropylene fibres, which can be applied as a reinforcing for cement, gypsum, concrete, etc. The fibre is obtained by moulding from a melt and further processing by ionising radiation. The fibre is 0.1-40 mm long, has a diameter of 5-170 mcm and the melt flow index higher than 500 g/10 min, measured in accordance with DIN EN ISO 1133.

EFFECT: application of the obtained fibres provides an increase of fire resistance of the concrete products.

5 cl, 1 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to chemistry of polymers and deals with a method of obtaining hardly flammable polymer products based on polyethyleneterephthalate with biocidal properties, which can be applied in the textile industry, medicine, in products of a special purpose as well as in other fields of industry. The method of obtaining hardly flammable polymer products based on polyethyleneterephthalate with biocidal properties includes stretch forming of polyethyleneterephthalate-based polymer product in an adsorption-active liquid medium, containing modifying additives, and the product drying, with, at least, one modifying additive being a biocidal preparation and, at least, one modifying additive being a fire retardant, and one of the modifying additives is pentaerythritol.

EFFECT: reduction of the polymer material dropping with preservation of lower combustibility and biocidal activity.

8 cl

FIELD: chemistry.

SUBSTANCE: composition contains low-molecular siloxane caoutchouc, ethylsilicate-40, octaphenyltetraasaporphyrinatocobalt(II) or octaphenyltetrapyrazinoporphyrazinatocobalt(II).

EFFECT: increase of covering stability to abrasion and its water-resistance.

1 tbl

FIELD: textiles, paper.

SUBSTANCE: method comprises treatment of cloth at room temperature with a composition comprising, g/l: polyhexamethylene guanidine hydrochloride 15-25, copper acetate or zinc acetate 4-7, acetic acid 4-7, and water up to 1 liter and then the cloth is heat-treated at a temperature of 130-180°C for 1-10 minutes, while half-woollen cloth is made by interlacing of warp and weft yarns of wool and polyester fibers with filling ratio of cloth in the warp and weft equal to 0.9-1.3.

EFFECT: giving the fabric antiallergenic and bacteriostatic properties, while maintaining the antimicrobial activity after wet treatments.

1 dwg

FIELD: textiles, paper.

SUBSTANCE: composition contains the agent which represents diethylene-glycol ester 1,3-dimethyl-4,5-dihydroxyethyleneurea - 15-30 g/l, magnesium chloride - 1-3 g/l, the agent representing styrene-vinyl-acetate-acrylic copolymer - 30-75 g/l and water - up to 1 litre.

EFFECT: reduced loss of strength and domestic shrinkage of processed material, maintaining soft handle, simultaneous infusion of properties of low crease retention and resistance to shrinkage, increase in reliability of the equipment operation due to the absence of adhesion, reduction of energy consumption during treatment of the material.

1 tbl

FIELD: textiles, paper.

SUBSTANCE: method of metallisation woven materials lies in melting of metal wires with electric influence, as well as in spraying of microparticles of molten metal to the plane of the material moving orthogonally to the direction of the spraying with the given speed of feeding and protected with the medium of spray distribution from the damaging effect of high temperatures. The explosive melting of the wire substance is carried out through high-voltage electric influence between the ends of the non-open wire delivered discretely to the metalliser in aqueous medium, and a cloud of ionised particles of evaporated metal is formed, and metallisation is performed by energy cumulation of thermal explosion W and electromagnetic focusing of motion trajectories of the ionised particles to the target rate of metallisation, and the rate of feeding Fn of the process material is regulated in time with a spacing frequency nsp of electric influence, and the volume Vw of the exploded wire is changed, as well as the spraying propagation medium, the voltage Uco and the spacing frequency nsp of electric influence formed by a bit relaxation circuit Lc-Ct, and the metallisation indices are set and controlled during metallisation according to the value of the scattering coefficient Ks of electromagnetic radiation, characterised by the formula: where: Uco is a voltage of electric influence exploding the wire; εm"ш" is dielectric capacitance of the fabric material and metal particles, respectively; α is lateral dimensions of the particles; W is energy released under electric explosion of the wire, of the given volume Vw; Zac is acoustic impedance of the discharge circuit forming the spacing frequency nsp of electric influence; ρmwf,λvap is density, specific electrical conductivity, heat of fusion and heat of vaporisation of the wire material in a given environment; Lc is the circuit inductance; Ct is capacity of tank of capacitors; T=tspTs⇔VwKl emf is the number of explosions of the wire in processing of area of fabric with volume Vfab necessary to ensure the given index of metallisation with guaranteed by experimentally proved dependence of metal amount introduced into the fabric on the volume of the exploded wire Vw taking into accountfor adjustment for the loss coefficient Kl emf at electromagnetic focusing of motion trajectories of the ionized particles; Ts is the sampling period of time of feeding the section of plane of metallised surface; d is thickness of the fabric; λ is wavelength of the electromagnetic radiation in a vacuum; and the value of the metallisation index Kp is set and controlled using a physical phenomenon of scattering of electromagnetic waves in the infrared range, and the voltage of electric influence Uco exploding wire with length of 40 mm and a diameter of 0.6 to 1 mm is adjusted from 2 to 4 kV with values of capacity of tank of capacitors Ct of 150 to 200 microfarad and values of the discharge circuit inductance Lc of 30 to 40 mcH, ensuring minimum loss of metal from 30% to 40% with an electromagnetic focusing of motion trajectories of the ionised particles.

EFFECT: technology is feasible in any media, including, liquids, the cloths have shielding properties, and antibacterial, antiviral, catalytic activity.

1 cl, 6 tbl, 6 dwg

FIELD: textiles, paper.

SUBSTANCE: bicomponent fibers contain aliphatic polyester or a mixture of aliphatic polyesters, which form the first component, and polyolefin or a mixture of polyolefins, which form the second component. Polyolefin contains auxiliary material improving its biodegradation. Textile sheets include these bicomponent fibers and are comparable by mechanical properties to textile sheets based on polyolefin, while they are decomposed more efficiently under the action of microorganisms than the textile sheets based on polyolefin.

EFFECT: enhanced biodegradability, to textile sheets such as nonwoven materials comprising these fibers, which can be used in personal care products.

16 cl, 3 tbl, 2 ex

FIELD: textiles, paper.

SUBSTANCE: bicomponent fibers contain aliphatic polyester or a mixture of aliphatic polyesters, which form the first component, and polyolefin or a mixture of polyolefins, which form the second component. Polyolefin contains auxiliary material improving its biodegradation. Textile sheets include these bicomponent fibers and are comparable by mechanical properties to textile sheets based on polyolefin, while they are decomposed more efficiently under the action of microorganisms than the textile sheets based on polyolefin.

EFFECT: enhanced biodegradability, to textile sheets such as nonwoven materials comprising these fibers, which can be used in personal care products.

16 cl, 3 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: liquid low-molecular siloxane rubber-based composition for fire-resistant material also contains ethyl silicate-40 or tetraethoxy silane as a curing agent and a titanium-containing compound in form of alkoxytitanium borate, where the alkoxy groups are ethoxy, propoxy or butoxy groups.

EFFECT: composition having high stability and adhesion to synthetic fabrics, which increases fire-resistance and reduces hardness of material with a coating made from said composition.

1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to the technology of producing anti-contamination composite materials. The material contains a polymer fibre substrate on whose surface there is a layer of fine inorganic particles and a binding component formed via chemical bonding. Each of said fine inorganic particles is coated with a silane monomer with unsaturated bonds. Content of said binding component ranges from 0.1 wt % to 40 wt % of the amount of fine inorganic particles. The material can be in form of a fabric, filter, mosquito net, construction material and material for inside rooms.

EFFECT: material is dustproof and highly durable.

13 cl, 10 dwg, 7 tbl, 15 ex

FIELD: chemistry.

SUBSTANCE: invention relates to rubber composition, in particular, for obtaining tyres or half-finished products for tyres. Rubber composition consists of at least diene elastomer, enhancing filler, cross-linking system, epoxy resin - from more than 1 to less than 20 phr and amine hardening agent - from more than 1 to less than 15 phr. Amine hardening agent is selected from the group, consisting of p-xilylenediamine, 1,3-bis(aminomethyl)cyclohexane, 1,8-diaminooctane, 3,3′-diaminobenzidine and their mixtures. Enhancing filler contains soot, silica or their mixture.

EFFECT: invention makes it possible to provide high rigidity with low deformation without noticeable impairment of hysteresis.

11 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to polyethylene terephthalate-based polymer compositions, which can be used in producing bottles, containers for different purposes, film articles and fibres. The polyethylene terephthalate-based polymer composition contains 3-10 wt % of polyhydroxyether with molecular weight of 25-35 thousand standard units.

EFFECT: invention increases melt flow index and lowers processing temperature, which reduces melt viscosity by 1,5-2,5 times and processing temperature by 20-25°C.

2 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: described is a binding agent, which contains a composition of epoxyvinylether resin, containing a compound of formula

100 wt. p., an accelerator NK-2 or OK-1 - 1-15 wt. p., isopropylbenzene hydroperoxide - 1-15 wt. p., manganese acetylacetonate - 1-2 wt. p., vanadium acetylacetonate - 0.015-0.020 wt. p. Also described is a polymer construction material, made from the claimed binding agent and reinforcing material.

EFFECT: obtaining the binding agent and based on it polymer construction material, which has reduced inflammability, reduced release of volatile toxic substances and increased index of inhabitation, with the preservation of strength characteristic.

14 cl, 1 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to the field of creating highly-strong composite materials based on fibrous fillers and epoxy binding agents, which can be used in the aviation industry, machine-, shipbuilding and other fields of technology. A binding agent includes dianic epoxy resin, the hardener diaminodiphenylsulphone and a modifier, the latter is represented by a mixture of thermoplastic modifiers, consisting of polysulphone and polyetherimide in a ratio from 1:3 to 3:1, with the following ratio of components, wt.p.: dianic epoxy resin - 100, mixture of thermoplastic modifiers - 1-25, diaminodiphenylsulphone - 35-50.

EFFECT: increase of toughness, strength and thermal resistance of the binding agent.

2 tbl, 8 ex

FIELD: chemistry.

SUBSTANCE: invention relates to high-frequency composite dielectric materials used in antenna engineering and high-frequency transmission lines. The composite material comprises packed fluoroplast-4 powder with particle size of no more than 5 mcm, impregnated with binder. The binder used is epoxy resin with a curing agent. The epoxy resin is a product of condensation of epichlorohydrin and aniline in an alkaline medium, with viscosity of no more than 200 mPa·s, and the curing agent used has viscosity of no more than 40 mPa·s. Impregnation with binder is carried out under pressure and while evacuating the volume of the powder, followed by curing.

EFFECT: producing a dielectric material with low permittivity, low dielectric loss tangent and improved properties such as strength and modulus of elasticity in compression.

1 dwg, 1 tbl

Epoxy composition // 2542234

FIELD: chemistry.

SUBSTANCE: invention relates to the field of epoxy compositions, in particular fast hardening epoxy compositions, used as glues, and a binder for the production of composite materials. The epoxy composition includes, at least, one epoxy novolac resin, or epoxydiane resin, or their mixture, an aromatic amine hardener and a curing accelerator, as the latter, it contains urethane rubber of casting grades SKU PFL.

EFFECT: invention makes it possible to reduce the temperature of the composition hardening and accelerate the process of its curing.

2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to the field of epoxy compositions, in particular to fast hardening hot moulding epoxy compositions, used as a binder for the production of composite materials by methods of pultrusion, casting, autoclave moulding. A hot curing epoxy composition includes at least one epoxy resin or its mixtures with epoxy resins, an anhydride hardener and phosphonium salt as a catalyst, selected from the group of quaternary phosphonium salts of the general formula where R1R2R3 are butyl or phenyl radicals, R4 is an aliphatic radical, containing 2-14 carbon atoms, X-H, phthalimide, Br, COO-, P(R1R2R3)+, A--Cl-, Br-.

EFFECT: invention makes it possible to reduce the time of the composition hardening, increase its viability in storage.

2 tbl

Polymer composition // 2540084

FIELD: chemistry.

SUBSTANCE: polymer composition for polymer compositional materials contains oligocyanurate, hollow microspheres, additionally contains epoxy oligomer with viscosity less than 5 Pa·s at room temperature, with the following component ratio, wt %: oligocyanurate 20-60, epoxy oligomer 5-40, hollow microspheres 23-35. Polymer composition is additionally contains fibrous filler and/or disperse filler. Also claimed is product from polymer composition.

EFFECT: obtaining polymeric composition with increased viability at room temperature, which has higher compression strength, impact strength, work temperature.

13 cl, 3 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: method includes interaction of diatomic phenol, epichlorohydrin and chlorocyclophosphazene. As chlorocyclophosphazene used is hexachlorocyclotriphosphazene or its mixture with higher chlorocyclophosphazenes[NPCl2]n, where n=4-15. Synthesis is carried out by direct interaction of said reagents in presence of bases. Diphenol is taken in quantity from 2 to 120 moles per NPCl2 unit, and epichlorohydrin is taken in not less than 2-fold excess with respect to diphenol.

EFFECT: elaboration of simple and technological method of synthesis of epoxyphosphazenes, characterised by high content of epoxy groups and easily compatible with industrial epoxy resins of ED type with application of available resources.

3 cl, 7 ex

FIELD: chemistry.

SUBSTANCE: invention relates to cyanic ester-based polymer compositions which are reinforced with fibrous filler and are used for producing structural polymer composite materials with operating temperature of up to 200°C and articles from said materials which can be used in aviation, aerospace, motorcar, ship-building and other industries. The invention also relates to prepregs which include said polymer composition and articles made from said prepregs. The cyanic ester-based polymer composition contains epoxy resin, which is a modifier and selected from: epoxy diane resin, epoxy novolac resin, nitrogen-containing epoxy resin or mixtures thereof, wherein components of the composition are in the following ratio, wt %: cyanic ester 55-95, epoxy resin 5-45. The composition can further contain a solvent selected from: acetone, ethyl acetate, isopropyl alcohol or mixtures thereof. The prepreg includes the described polymer composition and fibrous filler, wherein components of the prepreg are in the following ratio, wt %: polymer composition 30.0-50.0, fibrous filler 50.0-70.0. The fibrous filler used in the prepreg can be fabric or bundles or strips based on carbon or glass fibre. An article is made from said prepreg by moulding.

EFFECT: low viscosity of the cyanic ester-based polymer composition when processing and homogeneity of the composition, which enables processing thereof via a prepreg technique and enables to obtain water-resistant articles from polymer composite materials with improved thermomechanical properties, low coefficient of variation of physical and mechanical properties, well retained strength properties at high temperatures (up to 200°C), and reduced shrinkage of the composition during processing.

5 cl, 3 tbl, 12 ex

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