Glass and mineral or slag wool (C03)

C   Chemistry; metallurgy(311501)
C03            Glass; mineral or slag wool(14208)
ethod of producing primary preform for optical fibres, primary preform, final preform, optical fibre // 2607566
FIELD: manufacturing technology.SUBSTANCE: invention relates to production of optical glass fiber primary preform. Method of primary blank producing consists in using internal plasma-chemical deposition from vapor phase, wherein doped or non-doped glass-forming precursors are supplied to hollow glass base tube inner side, reaction zone in form of plasma is moved back and forth along said hollow glass base tube length between turning point near supply side and turning point near outlet side of hollow base tube, wherein base tube is installed in furnace and such conditions are created in said reaction zone, that one or more of glass layers packets composed of at least two separate glass layers are deposited on said base tube inner side.EFFECT: technical result consists in preparing primary workpieces having large used length, effect on optical narrowing can be made independently from geometric contraction, refraction index and/or cross section area can be accurately set depending on primary blank position in longitudinal direction.17 cl, 12 dwg
Glass-melting crucibles containing terminal ledges with recesses // 2607559
FIELD: glass.SUBSTANCE: invention relates to equipment for production of glass fibre. Glass-melting crucible (2) containing terminal ledges for heating of spinneret holder and walls, attached to opposite end walls (2A) of the crucible, each terminal ledge comprises electrically conductive plate (1) having the first outer edge (1D), attached to the first end wall (2A) of the vessel and extending from said end wall to the second free outer edge (1A), made with possibility of connection to power supply (5, 6), said plate has recess (3) containing: (a) a first open end (3A), width WA, located on the second free edge (1A) of the plate; (b) elongated section (3B) passing in direction of the first outer edge (1D), width WB, and (b) of the second closed end (3C) separated from the first outer edge (1D) of the terminal ledge, of a curved shape, note that curvature, 1/(2R), at any point of curved second end (3C) of the recess is less than the value 1/W0 reciprocal to minimum gap width W0, the first open end (3A), WA, and elongated section (3B), WB, where R is radius of curvature of curved second end (3C) in any point.EFFECT: technical result consists in reduction of rise of internal stresses inside the projection of a terminal, subjected to temperature drop with providing higher freedom of design to reduce cooling of end walls.8 cl, 4 dwg
Lithium silicate glass ceramics and glass with hexavalent metal oxide // 2607557
FIELD: ceramic industry.SUBSTANCE: invention relates to lithium silicate glass ceramic and glass, which are crystallized at low temperatures and are especially suitable as dental materials, in particular, for dental restoration. Lithium silicate glass ceramics contains hexavalent metal oxide, selected from MoO3, WO3 and mixtures thereof, in amount of 0.1–8.4 wt%, from 12.0 to 20.0 wt% of Li2O and wherein including from 0 to less than 0.5 wt% of K2O. For production of glass ceramics with lithium disilicate as main crystalline phase initial glass with germs is subjected to thermal treatment at temperature of 520–750 °C.EFFECT: technical result of invention is production of glass ceramic with improved mechanical and optical properties.22 cl, 1 tbl, 9 ex
Initial composition for glass fibres producing and glass fibre obtained from it // 2607331
FIELD: glass.SUBSTANCE: invention relates to glass compositions for producing high-modulus and high-strength glass fibres. Initial composition for glass fibre producing contains following components, wt%: from approximately 60.5 to approximately 70.5 of SiO2; from approximately 10 to approximately 24.5 of Al2O3; from approximately 11.96 to approximately 20 of alkali-earth metal oxide, from 0 to approximately 3 of alkali metals oxides. Said alkali-earth metal oxide denotes sum of MgO, CaO, SrO and BaO, where amount of MgO in said alkali-earth metal oxide makes at least 5 wt% of mentioned initial composition and amount of CaO in said alkali-earth metal oxide is less than 6.96 wt% of mentioned initial composition.EFFECT: technical result consists in reduction of fiberization temperature, increase of difference between liquidus temperature and fiberization temperature, which leads to fiber higher elasticity and helps to prevent glass devitrification.20 cl, 8 tbl
Lithium silicate glass ceramics and glass with monovalent metal oxide // 2606999
FIELD: chemistry.SUBSTANCE: invention relates to lithium silicate glass ceramics and glass for use in dentistry. Lithium silicate glass ceramic contains a monovalent metal oxide selected from Rb2O, Cs2O and mixtures thereof, from 0 to less than 5.1 wt% Al2O3 and from 0 to less than 1.0 wt% K2O.EFFECT: reduced temperature of crystallisation.24 cl, 1 tbl
Ceramic pigment // 2606888
FIELD: ceramic industry.SUBSTANCE: invention relates to compositions of ceramic pigments. Ceramic pigment contains, wt%: SiO2 32.0–40.0; Al2O3 25.0–30.0; Fe2O3 6.0–8.0; CaO 3.0–4.0; K2O 1.0–1.6; Cr2O3 12.0–16.0; TiO2 1.0–2.0; ZrO2 6.4–9.0; Pr2O3 1.0–2.0.EFFECT: technical result is simplification of technology of preparing pigment.1 cl, 1 tbl
Formaldehyde-free binder composition for mineral fibres // 2606615
FIELD: chemistry.SUBSTANCE: invention relates to formaldehyde-free aqueous binding composition for mineral fibres. Composition contains at least one monosaccharide, ammonium sulphamate or sulphamate of alkali or alkali-earth metal in amount from 1 to 10 wt% and ammonium hydroxide and/or organic ammonium salt.EFFECT: composition provides an advantage in form of a short time of polymerisation during production of fibrous mineral material, ensuring thermal and mechanical stability of said material.17 cl, 2 tbl, 2 ex
Charge composition and method of producing foamed heat-insulating material // 2606539
FIELD: heat insulation.SUBSTANCE: invention relates to heat insulating materials. Charge components are mixed in following ratio, wt%: amorphous silicic rock 48–55; dry sodium hydroxide 15–18; aluminosilicate component 3–5, water 24–35. Preparation of charge comprises first synthesizing primary sodium hydrosilicate with silica modulus of 2.1–2.2 when mixing dry sodium hydroxide with 54.5 % of total amount of amorphous silicic rock and hot water in specified quantity. Obtained sodium hydrosilicate is mixed with remaining amorphous silicic rock, followed by granulation of mixture and powdering granules of aluminosilicate component. Granules are loaded into a mould with a closed volume and foamed at a temperature of 760–780 °C for 20–40 minutes.EFFECT: technical result of invention is reduction of moisture content and simple composition of charge.2 cl
ethod of producing silicon dioxide coatings on silicate glass // 2606009
FIELD: chemistry.SUBSTANCE: invention relates to thin-film transparent coatings of silicon dioxide on glass. Method comprises performing a sol-gel process of silicon tetraalkoxide in presence of additives in sol products of hydrolysis of metal alkoxides. Metal alkoxides used are alkoxides of aluminium, or titanium or zirconium. Metal alkoxide hydrolysis products are fed into silicon dioxide sol with concentration of 0.1–0.5 mol%. Glass coating is applied by dipping.EFFECT: technical result is curing coating at low temperature, high strength of coating.1 cl, 19 dwg, 14 ex

Furnace for burning glass blocks // 2605857
FIELD: furnaces and plates.SUBSTANCE: invention relates to glass industry, in particular, to a furnace for burning glass blocks intended for repeated heating and subsequent cooling. Furnace for burning glass blocks contains a set of superimposed independent heating chambers. Every heating chamber is equipped with: at least a receiving hole for a passage of at least a glass unit; a motorized roller surface, onto which a glass block lies and moves. Also the heating chamber is equipped with a heater intended to heat the glass block in the heating chamber and with cooling means intended to control the controlled cooling of the heating chamber. Cooling means contain a set of pipes with a circulating coolant, which are located inside the heating chamber. Each pipe of each heating chamber is connected to the main line closed with a shutoff valve controlling the coolant flow circulating in the pipes. Said main line is connected with one pump system designed to feed the coolant into each of the pipes.EFFECT: technical result is higher efficiency and power efficiency.11 cl, 7 dwg

ethod of luminescent quartzoid bismuth-containing material producing based on high-silica porous glass // 2605711
FIELD: glass.SUBSTANCE: invention relates to novel optical glass-like quartzoid materials technology, having luminescence in wide spectral range, and can be used in production of fibre-optic guides with laser generation in infrared spectral range and various devices on their basis for fibre-optic communication lines components optimization. Disclosed is method of bismuth-containing quartzoid glass producing based on nano-porous high-silica glass (NPG). Method involves introduction in NPG pore space matrices in several stages by 24 hours at 22±2 °C of 0.5M solution of Bi(NO3)3, drying of samples at 30-65 °C for 40-60 minutes. Impregnated and dried samples are subjected to multistage heat treatment in air atmosphere in electric furnace. At that, samples are placed on substrate from high-purity quartz glass and heated for 5 minutes using oxygen-hydrogen burner, which is supplied from quartz substrate side.EFFECT: invention ensures production of glass-like quartzoid bismuth-containing materials to form different bismuth active centers (BAC) in them, including the IR luminescence centers.3 cl, 4 dwg, 1 ex

Air dispersion of mineral fibres in production of ceiling tiles // 2605210
FIELD: construction; acoustics.SUBSTANCE: invention relates to production of acoustic ceiling tiles based on mineral wool. Method of producing diluted aqueous suspension for water hardening of main mat for acoustic ceiling tiles, includes delivery of a bale of pressed mineral wool with density of at least 8 pounds per cubic foot (approximately 0.13 g/cm3) on section for unpacking bales, disconnection of attachment holding bale in compressed state, mechanical separation of fibres from bale of mineral wool by mechanical means arranged with possibility of dispersion of fibres to ensure overall uniform density of less than 2 pounds per cubic foot (approximately 0.032 g/cm3), until passage of fibres via inlet of tank and direction of separated mineral fibre into mixing tank for bringing into contact with binding agent suspended in water.EFFECT: technical result consists in improvement of acoustic characteristics, high mechanical properties of tiles.4 cl, 3 dwg

Product with low-emission coating, including absorbing layer over functional layer, intended for increasing external reflectance // 2605209
FIELD: manufacturing technology.SUBSTANCE: invention relates to an article with low-emission coating. Coating contains the following layers with distance from glass: silicon nitride layer; zinc oxide layer; silver layer; metallic absorbing layer containing Ni and/or Cr; silicon nitride layer; layer containing metal oxide; zinc oxide layer; silver layer; at least one dielectric layer.EFFECT: high coefficient of reflection of visible light on the outer side of glass, radiation reduction.29 cl, 2 dwg, 3 tbl

Transporting unit with inclined rollers for hot molded glass sheets // 2605108
FIELD: technological processes; machine building.SUBSTANCE: invention relates to transporting unit with inclined rollers for hot molded glass sheets. Comprises horizontal-inclined roller (74) having opposite ends, supported by first and second supports (64, 66), respectively, wherein one support (64) includes supporting bearing (80), and other support (66) comprises drive connection (94), which ensures rotation of inclined roller from horizontal support and driving axis to ensure support for lower surface of upper part Gu of moved hot molded concave up glass sheet G.EFFECT: increases transfer unit efficiency.10 cl, 14 dwg

Artificial porous glass gravel // 2604731
FIELD: glass.SUBSTANCE: invention relates to the industry of making artificial porous glass gravel. Artificial porous glass gravel as raw materials contains scrap glass, glycerin, soluble glass, thermal power plant slag in the following proportions, wt%: thermal power plant slag 25-35; scrap glass 65-55; glycerin 8; soluble glass 2.EFFECT: technical result consists in reduction of foaming temperature up to 850-870 °C, increase in number of thermal power plant slag in the composition of artificial porous glass gravel.1 cl, 1 tbl, 3 ex

Luminescent glass ceramic material // 2604614
FIELD: glass.SUBSTANCE: invention relates to transparent glass ceramic oxide materials which can be used as the active part of converters into the visible UV radiation spectrum of solar-blind range. Glass crystalline materials have the following composition, wt%: Li2O 0.03-3.02; Na2O 0.08-6.07; Ga2O3 27.9-52.5; SiO2 15.4-25.5; GeO2 26.8-44.4.EFFECT: technical result of the invention is to produce a transparent glass ceramic material based on γ-Ga2O3 luminescent in the blue spectrum with a minimum response at wavelength > 290 nm.1 cl, 4 dwg, 2 tbl

ethod of making articles from glass-ceramic of lithium-aluminosilicate composition // 2604611
FIELD: manufacturing technology.SUBSTANCE: invention relates to production of ceramic articles for radio engineering purposes. Milled is amorphous glass by the wet method to produce an aqueous slip, formed are workpieces in gypsum molds. Then they are repeatedly processed into a slip, articles are moulded and heat-treated in two stages. At the first stage they are heat-treated at the temperature of nucleation by raising the temperature from 600 to 700 °C at a constant speed within the range of 10-20 °C/hour. Then at the second stage thermal treatment is performed at the upper crystallization and sintering temperature of 1,230-1,250 °C with maintaining for 4-7 hours in high-temperature furnaces.EFFECT: technical result is improvement of quality of articles from glass-ceramic of lithium-aluminosilicate composition.1 cl, 1 tbl

Lithium silicate glass or glass ceramics, method for production thereof and use thereof // 2604601
FIELD: chemistry.SUBSTANCE: invention relates to glass ceramics based on lithium metasilicate. Lithium silicate glass or glass ceramics have the following composition, wt%: SiO2 50-75, Li2O 10-25, ZrO2 and HfO2 5-30, K2O 0-8, Al2O3 0-8, additives 0-15.EFFECT: technical result is improvement of strength, chemical resistance of glass ceramics.16 cl, 3 dwg, 5 tbl

D1452 gb radiation-curable coating for optical fibre // 2604227
FIELD: materials.SUBSTANCE: invention relates to curable compositions. Radiation-curable primary coating for optical fibre includes, in uncured state, from 50 % to 65 % by weight of an oligomer composition, including a product of reacting: a) at least one polyether polyol, having molecular weight from 3,500 g/mol to 10,000 g/mol; b) at least one diisocyanate, selected from a group consisting of aromatic diisocyanate, aliphatic diisocyanate and mixtures thereof; c) at least one acrylate or (meth) acrylate with terminal hydroxy groups; and d) alcohol selected from a group including methanol, ethyl alcohol, propanol, butanol, hexanol, octanol; from 30 % to 50 % by weight of a composition of a mixture of active diluent monomers including at least two active diluent monomers, where each of said monomers in said mixture includes at least one phenyl group or phenoxy group and at least one acrylate group, having formula: , where x is an integer from 1 to 6; n is an integer from 1 to 5; and each Y, which can be identical or different, is independently selected from a group consisting of hydrogen, C1-C12 alkyl group and alkarylalkoxylated acrylate radical; and at least one photoinitiator; said active diluent monomer mixture is substantially free of non-aryl active diluent monomers; in which, in case of an aryl active diluent monomer with molecular weight less than about 300, its amount is not more than about 10% of total weight of composition.EFFECT: invention also relates to optical fibres coated with said coating.61 cl, 21 ex

Glueing compositions and methods of use // 2603974
FIELD: materials.SUBSTANCE: invention relates to glueing compositions for fiberglass strands, the fiberglass strands obtained by coating glass fibres with the said glueing compositions and composite materials containing the said fiberglass strands. Glueing composition contains by weight of dry residue/content of dry substance: 0.1-2 % of at least one structurising additive, 2-15 % of at least one film-forming agent, 0.1-4 % of at least one binding agent, 0.01-0.5 % of at least one cationic polymer containing a poly-alkylen imine skeleton, wherein the said polymer has 20 % or less of active amino groups, 0.1-6 % of at least one compound selected from a lubricant, a surfactant, a plasticizer, a dispersing agent, additives and their mixtures.EFFECT: technical result is improvement of stability and the increase of viscosity of the glueing composition while improving treatment of fibres.16 cl, 6 dwg, 3 tbl

Dwell time controlling method and system with pressure switching moment automatic control // 2603861
FIELD: machine building.SUBSTANCE: dwell time controlling system and method for automatic control of selection and distribution in time of pressure sequence, used to drive plunger in rough mold during pellet forming process. Distribution in time of pressing observed curve characteristics based on one or more previous pellet forming cycles is determined and used for control over distribution of pressure changes in time during next cycle of pellet forming. In order to prevent rough mold forced opening and to prevent overpressed neck formation, time distributions of these pressure changes are determined as specified, expressed in percentage of characteristics part distributed in time.EFFECT: simplifies maintenance, provides design reliability and durability.36 cl, 2 dwg
Additives for ceramic glazes // 2603683
FIELD: ceramic industry.SUBSTANCE: invention relates to production of vitreous slips for coating of raw or annealed ceramic articles. Composition of vitreous slip includes the extruded granules containing 5-85 wt% of carboxymethyl cellulose (CMC) and 5-85 wt% of at least one other additive for ceramic glaze selected from a suspension agents (water-swellable clay), thickening agents (natural water-soluble polymers), different from CMC, preservative agents, biocides, defoaming agents, binding agents, deflocculating agents, plasticisers, deaerating agents, leveling agents and mixtures thereof. Said components are more than 40 wt% of dry material granules. Granules are added to vitreous slip in the amount of 0.05-5 wt%.EFFECT: technical result is optimization of processing and dosing additives into the vitreous slip, reduced lump formation in the vitreous slip.11 cl, 5 tbl, 4 ex

ethod for glass melting in the glass melting furnace bath // 2603115
FIELD: glass.SUBSTANCE: invention relates to glass industry and can be used for production of high-quality float glass. Proposed method comprises batch routing to the glass furnace, liquid glass melt melting in the melting part of the furnace, liquid glass melt chilling in the chilling part of the furnace, liquid glass melt electric heating at the stage of production. Electric heating is performed by electric heating of liquid glass melt lateral layers of drain unit using one or several pairs of oxide-tain electrodes, connected to a current source, with the width corresponding to thickness of the drain unit side walls. Electrodes are symmetrically located in the drain unit side walls at the height of not more than 0.7 of liquid glass melt level height and at the distance of 20-40 mm from the bottom of the drain unit. Liquid glass melt temperature gradient along the width of drain unit is not more than 5 °C.EFFECT: technical result is increase in temperature homogeneity of the liquid glass melt in the drain unit and reduction of produced glass thickness.1 cl, 3 dwg, 1 tbl, 1 ex

High-purity granular silicon dioxide for use in quartz glass and method of producing this granular silicon dioxide // 2602859
FIELD: technological processes.SUBSTANCE: invention relates to production of high-purity granular silicon dioxide for further production of quartz glass. Granular silicon dioxide according to the invention has alkali metals content from 0.01 to 10.0 parts/million, content of alkali-earth metals from 0.01 to 10.0 parts/million, content of boron from 0.001 to 1.0 parts per million, content of phosphorus from 0.001 to 1.0 parts per million. Defined by nitrogen sorption pore volume is from 0.01 to 1.5 ml/g and maximum size of pores is from 5 to 500 nm. For producing such product soluble glass of traditional cheap varieties reacts in strongly acidic conditions to silicon dioxide of high-purity types, with subsequent alkaline treatment. Finally, fraction of particles with size from 200 to 1,000 mcm is separated and its sintering at temperature of at least 600 °C takes place.EFFECT: obtaining products with low content of silanol groups through a cheaper method.31 cl, 2 ex, 2 tbl

Fire protection element with protective coating and method for producing same // 2602849
FIELD: glass.SUBSTANCE: invention relates to fire-resistant glazing. Fire‑protection element comprises at least one transparent carrier element and a fire‑protection agent applied on one surface of carrier element. Surface of carrier element directed toward fire‑protection agent has a protective coating. Protective coating comprises hafnium oxide, and/or vanadium oxide, and/or niobium oxide, and/or zinc nitride and/or tin nitride, and/or hafnium nitride, and/or vanadium nitride and/or niobium nitride.EFFECT: technical result is reduced turbidity of fire-resistant glazing.11 cl, 3 dwg

Silica sol and cellular complex, tissue and/or body with a fibrous matrix of the polysilicic acid // 2602620
FIELD: medicine.SUBSTANCE: invention relates to a biologically degradable and/or absorbable silica gel materials, used in medicine for creation of cellular complex, tissue or body with fibrous matrix of polysilicic acid. In the presence of a water-soluble solvent for at least 16 hours at a temperature from 0 to 80 °C and initial pH from 0 to ≤ 7 acid catalysis reaction of hydrolytic condensation of one or more silicon compounds of formula SiX4, in which the radicals X are identical or different and are hydroxy, hydrogen, halogen, amino, alkoxy, acyloxy, alkylcarbonyl and / or alkoxycarbonyl and are derived from alkyl radicals, optionally substituted straight-chain, branched or cyclic radicals having 1 to 20 carbon -atoms, preferably having 1 to 10 carbon atoms, constitute, and may be interrupted by oxygen or sulfur atoms or by amino groups. By a subsequent evaporation phase solution having a viscosity in the range of 0.5 to 2 Pa · s at a shear rate of 10 s -1 at 4 °C is formed. This solution is subsequently cooled and is subjected to a kinetically controlled ripening, in which a homogenous one-phase sol is formed.EFFECT: sol is used, as a spinning material for making biologically resorbable and/or biologically degradable fibers and nonwovens or as material for making biologically absorbable and/or biologically active powder (s), monolith (s) and/or coating (s) in medicine and /or medical equipment, primarily for treating and/or wound healing.13 cl, 2 ex, 2 tbl, 4 dwg

Glass // 2602594
FIELD: construction.SUBSTANCE: invention relates to glasses with optically transparent coating, which are used in construction, design of rooms and transport. Optically transparent coating is applied to glass. Optical bleaching agent is used as coating, wherein total layer thickness of optical bleaching agent is no more than 500 nm.EFFECT: increase of coefficient of light transmission in visible spectrum due to conversion of ultraviolet component of light, received by glass, into visible light.4 cl, 2 dwg

Glass microsphere // 2602328
FIELD: manufacturing technology.SUBSTANCE: invention relates to glass microspheres, which can be used for roads surface marking and in production of light-returning devices. Glass microsphere is made from transparent glass. Microsphere surface is dressed with composition including optical bleaching agent and adhesion promoter.EFFECT: increasing light reflection coefficient.5 cl, 1 dwg

Chalcogenide glass // 2601786
FIELD: glass.SUBSTANCE: invention relates to chalcogenide glasses. Chalcogenide glass contains, wt%: As 30.0-35.0; S 40.0-50.0; Na 20.0-25.0.EFFECT: technical result of invention is reduction of glasses synthesis temperature.1 cl, 1 tbl

ethod of modifying coarse fibre from industrial wastes for production of construction fibre // 2601352
FIELD: construction.SUBSTANCE: invention relates to production of construction fibre from man-made wastes. Method for production of construction fibre from man-made wastes by supplying minerals into melting furnace, obtaining melt, its homogenization and drawing of continuous fibres from feeder spinnerets with subsequent cutting without preliminary winding, wherein fiber treatment with low-temperature plasma is performed in high-temperature area, adjacent to output of spinnerets.EFFECT: technical result consists in improvement of adhesion properties of produced fibre.1 cl, 1 dwg

ethod for production of glass articles from material for them and device for implementing the said method // 2601346
FIELD: technological processes.SUBSTANCE: invention relates to a method for production of glass articles. Method involves heating the material for glass products, moulding a glass article; cooling of the article; check of the moulded glass products with a light sensor. Multiple images of the glass article are obtained with multiple mutually different viewing directions relative to the article respectively. Said multiple images are compared for detection of potential defect in the article. Possible defect is ignored and not classified as an existing defect or classified as a spurious reflection, if the possible defect appears only on one of the images, on minor part of the images in the same position on the article, on images, the number of which is less than the preset one. Possible defect is ignored, if the possible defect appears in different positions on the article at the said multiple images. Possible defect is classified as an existing one, if the possible defect appears on each of the images in the same position on the article on major part of images in the same position on the article or at least on the preset number of images in the same position on the article.EFFECT: simplification of spurious reflections identification method.35 cl, 19 dwg

System and method of controlling temperature of the rough shape with a closed cycle // 2601076
FIELD: control equipment.SUBSTANCE: invention relates to monitoring system of temperature of the rough shape for machine sections with a closed cycle in production of glass articles. Control system comprises of a device for determining temperature of rough surface shape, coolant source, a valve for coolant supply, at least, to one element of the rough shape, input data of temperature, a controller to provide output data of cooling duration for valve control, that supplies the coolant, a system for controlling errors with feedback. System for monitoring of errors with feedback controller of the thermal model shape, which calculates the forecast temperature of the rough shape, first summation for subtracting the predicted temperature provided by the controller of thermal model of shape of temperature measurement result provided by the device for measuring heat to produce error modelling. Control system also contains the second summation to subtract error simulation provided by the first summation from the input temperature data indicating the desired temperature to obtain the error signal, that is supplied to the controller.EFFECT: technical result is in improvement of quality of glass containers due to maintaining of the preset temperature value of blanks.18 cl, 9 dwg

ultilayer glass and method for production thereof // 2600946
FIELD: glass.SUBSTANCE: invention relates to multilayer glass. Multilayer glass is made from a plurality of glass sheets joined by intermediate layer. Among multiple glass sheets, at least two glass sheets are thick glass sheet and thin glass sheet. At any temperature between temperature of annealing and softening temperature the thick glass sheet has lower viscosity than the thin glass sheet. Two glass sheets of different thickness satisfy the formula 1<y<(1.22-0.206×x) and formula 1<z<(1.15-0.131×x), where x (x = t2/t1) is a ratio of thickness (t2) of thin glass sheet to thickness (t1) of thick glass sheet at room temperature; y (y=lg10η2/lg10η1) represents a relation of logarithm (lg10η2) of thin glass sheet viscosity to logarithm (lg10η1) of thick glass sheet viscosity at annealing temperature for the thick glass sheet; z (z=lg10η4/lg10η3) is a relation of logarithm (lg10η4) of thin glass sheet viscosity to logarithm (lg10η3) of thick glass sheet viscosity at melting temperature for the thick glass sheet.EFFECT: technical result of invention is improvement of bending accuracy.13 cl, 10 dwg, 3 tbl

Urea modified binder for mineral fibres // 2600914
FIELD: chemistry.SUBSTANCE: aqueous binder composition for mineral fibres containing: (1) a water-soluble binder component obtainable by reacting at least one alkanolamine with at least one polycarboxylic acid or anhydride and, optionally, treating the reaction product with a base; (2) sugar component; and (3) urea, proportion of components (1), (2) and (3) being within the range of 10 to 80 wt.% of (1), 15 to 80 wt.% of (2), and 5 to 60 wt.% of (3), based on the solids content of components (1), (2) and (3) as measured after heat treatment for 1 hour at 200 °C.EFFECT: new composition.29 cl, 1 ex, 1 tbl

Fibre glass strands and reinforced products comprising same // 2600369
FIELD: chemistry.SUBSTANCE: present invention relates to aqueous adhesive compositions for application to glass fibres as well as fibre glass strands and polymeric resins reinforced with glass fibres. Versions of invention relate to fibre glass strands which include at least one glass fibre, at least partially coated with aqueous adhesive composition containing an acid-amine component.EFFECT: obtaining aqueous adhesive compositions, which provide protection during process steps, as well as compatibility between fibres and matrix polymer or resin.34 cl, 6 tbl, 9 ex

Glass mass opacifier // 2600237
FIELD: technological processes.SUBSTANCE: invention relates to compositions of glass mass opacifiers. Glass mass opacifier contains, wt%: ground to particle size 0.1-0.25 mm expanded pearlite 40.0-60.0; dust from electrostatic filters of rotating furnaces of cement production industry 40.0-60.0.EFFECT: wider raw material base.1 cl, 1 tbl

Glass // 2600235
FIELD: chemistry.SUBSTANCE: invention relates to technology of silicates and relates to glass compounds, which can be used for production of vacuum-tube devices. Glass contains, wt%: SiO2 45.0-55.0; Al2O3 10.0-18.0; B2O3 6.0-10.0; MgO 2.0-4.0; ZnO 13.0-15.0; K2O 2.0-4.0; BeO 3.0-5.0; NiO 3.0-5.0.EFFECT: technical result consists in improvement of heat resistance of glass.1 cl, 1 tbl

Underglaze paint // 2600234
FIELD: chemistry.SUBSTANCE: invention relates to compositions of underglaze paints. Underglaze paint contains, wt%: Cr2O3 6.0-12.0; MnO2 4.5-5.5; FeO 10.0-12.5; SiO2 56.0-60.0; V2O5 13.0-20.0.EFFECT: technical result is lower burning temperature of paint.1 cl, 1 tbl

Glaze // 2600233
FIELD: chemistry.SUBSTANCE: invention relates to glaze compositions. Glaze contains, wt%: SiO2 50.0-60.0; Al2O3 16.5-21,0; CaO 1.0-2.0; K2O 1.0-3.0; Na2O 1.0-2.0; B2O3 12.0-15.0; ZrO2 4.0-6.0; Cr2O3 1.5-3.0.EFFECT: higher heat resistance.1 cl, 1 tbl

Enamel // 2600231
FIELD: chemistry.SUBSTANCE: invention relates to enamel compositions. Enamel contains, wt%: SiO2 32.0-38.0; MgO 12.6-14.0; TiO2 0.6-1.0; Al2O3 3.0-5.5; CaF2 3.0-5.0; Fe2O3 6.0-8.0; CaO 13.0-15.0; K2O 14.0-16.0; NiO 4.5-6.1; Cu2O 0.8-1.5.EFFECT: technical result consists in improvement of impact strength of enamel.1 cl, 1 tbl

D1479 stable liquid bis(acyl)phosphine photoinitiator and use thereof in radiation-curable compositions // 2600053
FIELD: chemistry.SUBSTANCE: invention relates to radiation-curable compositions, selected from a group, comprising a coating composition for optical fibres, coating composition suitable for radiation curing on concrete, and coating composition suitable for radiation curing on metal. Composition contains liquid bis(acyl) phosphine of formula (I), where each of groups Ar1, Ar2 and Ar3 independently represents a substituted or unsubstituted aryl group and at least one free-radical polymerisable component. Liquid bis(acyl)phosphine of formula (I) used in radiation-curable composition, in particular, is bis(2,4,6-trimethylbenzoyl)phenylphosphine, wherein radiation-curable composition is used in combination with bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide.EFFECT: technical result is high rate of hardening and good optical transparency and balance of main operational characteristics, including existence in liquid state for radiation-curable compositions.19 cl, 1 tbl, 1 ex (I)

Glaze // 2599895
FIELD: chemistry.SUBSTANCE: invention relates to glaze compositions. Glaze contains following in wt%: SiO2 52.0-56.0; Al2O3 7.0-9.0; TiO2 0.1-0.15; CaO 2.0-5.0; MgO 1.0-3.0; B2O3 16.8-17.8; K2O 2.0-3.0; SrO 3.9-4.6; ZnO 4.0-5.0; HfO2 0.5-1.0; ZrO2 2.5-3.5.EFFECT: high heat resistance of glaze.1 cl, 1 tbl

Device dispensing glass fibres, with reduced content of precious metals // 2599518
FIELD: technological processes.SUBSTANCE: invention relates to device generating fibre molten material, particularly glass, and method of making said device. Device, dispensing fibre molten material, when heated due to Joule-Lenz effect at power supply, containing side plates, bottom plate equipped with nozzles for outflow of fused material, and optionally top grid, at least one of these parts, which can be in contact with molten material consists of: massive part from iron-based alloy with melting point higher than 1,450 °C, generatrix of substrate, connecting metal layer formed at least part of substrate surface, ceramic layer covering connecting metal layer, wherein metal layer and ceramic layer form diffusion barrier for alloy components forming substrate, and layer of protective coating made of platinum or platinum alloy applied directly on ceramic layer.EFFECT: manufacturing device from cheaper material, which has good resistance to oxidation, good corrosion resistance and wettability glass.17 cl, 2 dwg

Soot radial pressing for optical fibre overcladding // 2599390
FIELD: optics; technological processes.SUBSTANCE: invention relates to methods and devices for radial pressing of soot for cladding optical fibre and, in particular, to methods and a device for production of optical fibre workpieces. Device has an outer wall and an inner wall. Outer wall surrounds inner wall and inner wall surrounds an inner cavity of device. Core rod is deposited in inner cavity after which particulate glass material, such as glass soot, is deposited in inner cavity around core rod. Core rod has at least 10 % of final cladding soot already applied thereto. Radially inward pressure is applied against particulate glass material to pressurise particulate glass material against core rod.EFFECT: improved density and geometry of workpieces.13 cl, 7 dwg

Lubricant composition for glass fibre // 2599288
FIELD: materials.SUBSTANCE: present invention is related to reinforced glass fibre composite materials. Disclosed is a lubricant composition for glass fibre containing the following components: (a) a binding agent on the basis of silane, containing monomer siloxane or oligomeric polysiloxane with not more than 10 links, preferably not more than 6 links; (b) film-forming agent; (c) borate or boron oxide; (d) lubricant; (e) water, with at least 75 % w.w. of silane binding agent, present in the composition, dialkoxylated, not sylon The invention also discloses glass fibre composite material and the use of composite materials.EFFECT: technical result is optimization of load transfer from the polymer matrix to reinforcing fibres for complete opening mechanical potential of composite materials.16 cl, 3 dwg, 1 tbl

Glass // 2599265
FIELD: manufacturing technology.SUBSTANCE: invention relates to glass compositions. Glass contains, wt%: SiO2 44,0-47,0; B2O3 1,0-3,0; CaO 10,5-11,5; ZnO 8,0-10,0; Na2O 4,0-6,0; K2O 13,0-15,0; Sb2O5 2,0-3,0; CdO 10,0-12,0.EFFECT: technical result is higher refraction index of glass.1 cl, 1 tbl

Device for cutting inserts // 2598741
FIELD: technological processes.SUBSTANCE: present invention relates to devices for cutting inserts from a mat of an insulating material by means of blasting. Device comprises jet nozzles with motor drives, a transport path for continuously transporting the mat and two guides, which are located at some distance from each other in direction of mat transportation and are provided to support the jet nozzles. Jet nozzles can move independently along the guides. Said water jet nozzles are associated with another additional guide provided to support another water jet nozzle that can move along the additional guide. Additional guide can be moved by a drive parallel to the direction of the mat transportation.EFFECT: to increase the cutting efficiency and accuracy.9 cl, 5 dwg

Heat-resistant cover // 2598657
FIELD: engines and pumps.SUBSTANCE: invention relates to materials which protect parts of gas turbine engines that made out of heat-resistant steels and nickel alloys against oxidation under action of high-temperature gas corrosion during operation. High-heat resistant cover, mas%: Al2O3 - 13.0-18.0, MgO - 1.0-2.5, CaO - 3.0-8.0, BaO - 5.0-9.0, TiO2 - 1.5-4.8, B2O3 - 3.5-7.6, Cr2O3 - 2.5-6.0, BaSi2O5 - 5.0-10.0, BaAl2Si2O8 - 2.0-6.5, mineral complex compound based on SiO2 - 2.5-6.0, SiO2 - the rest.EFFECT: higher heat resistance, thermal fastness, wetting ability of the surface of samples and strength of adhesion of coating with substrate.1 cl, 3 ex, 2 tbl

Apparatus for bending glass hemispheres // 2598656
FIELD: optics.SUBSTANCE: invention relates to making curved articles with parabolic or spherical curvature of surface. Apparatus for bending glass hemispheres comprises heating chamber, vertically displaced hearth with counterweights, mechanism for raising and lowering hearth by rod connected thereto, vacuum system, connected to heating chamber. In lower part of stock rocker is installed, connected with two support posts. Posts are connected with bracket to move it vertically by flywheels, located in their top parts and connected with flywheels pins-links arranged in columns.EFFECT: technical result consists in reduction of time bending and reduced power consumption.1 cl, 2dwg

ethod of producing fluoride glass with an extended range of optical transmission // 2598271
FIELD: technological processes.SUBSTANCE: invention relates to producing fluoride glass with an extended range of optical transmission. Technical result is producing optically transparent glass without oxygen-containing impurities with expanded range transmission of 0.21 to 7.5 mcm for fluorzirconate glass and 0.225 to 8 mcm for fluorhafnate glass. Charge of a mixture of metal fluorides, selected from: metal fluoride of IV group; BaF2; LaF3; AlF3; NAF, is melted in dry argon atmosphere at temperature of 850÷950 °C for 30÷60 minutes and then cooled. Before melting charge is processed with fluorinating agent - xenon difluoride at temperatures of its reaction with oxygen-containing impurities, followed by removal of gaseous reaction products in vacuum. ZrF4, or HfF4 are used as metal fluoride of IV group. Processing of the charge by fluorinating agent is performed at temperature of 300÷350 °C for 3÷5 hours. Removal of gaseous reaction products in vacuum is performed at temperature of 100÷150 °C. Produced glass is further annealed at 250÷270 °C for 2÷3 hours to prevent cracking.EFFECT: producing optically transparent glass without oxygen-containing impurities.3 cl, 2 dwg, 2 ex