Method of rubber-polymer plates production

FIELD: technological processes.

SUBSTANCE: rubber-polymer plates are designed for lining of different surfaces and structures exposed to permanent load and wear. Layer of uncured rubber 1.5÷20.0 mm thick is placed in mould with regulated shear deformation, above which layer of ultrahigh molecular polyethylene is evenly filled with molecular mass of 1.5·106 g/mole ÷ 10.0·106 g/mole. Volume of ultrahigh molecular polyethylene layer filling is calculated on the basis of final height of compact polyethylene layer, selected from 1.5 to 20.0 mm, cross section of mould and density of ultrahigh molecular polyethylene of 0.936 g/cm3. Then prepared composite is exposed to volumetrical compression in mould and then sintered at the temperature of 160÷210°C, pressure of 30 kg/cm2, and cure for 15 minutes - 1.5 hour.

EFFECT: preset thickness of plates and high strength of connection between layers.

 

The invention relates to the chemical industry, and in particular to methods of manufacture of rubber-polymer plates.

A known method for joining rubber and polyethylene with adhesive (Experimental Chemical Production of organic chemistry SB RAS. Water-resistant adhesive compositions AK, BK, PVB, LAT, UK, etc. http://chempilot.narod.ru/ProductsService/ComposMt/Glue/GlueComp.htm).

The disadvantage of this method is the instability of such compounds due to the physico-chemical properties of the adhesive.

A known method for joining rubber and polyethylene, taken as a prototype, including their joint heat treatment (LLC "Transaction". Rubber and polymeric materials. http://www.r-plast.ru/). The disadvantage of this method is the impossibility of creating a rubber-polymer plates with thickness due to its technological features (temperature etc)

The present invention is the creation of compact rubber-polymer composite with a thickness of plates and high bonding strength between the layers.

This is achieved by the fact that in the mold with adjustable shear deformations laid layer devulcanizing rubber thickness of 1.5÷20.0 mm, evenly on top of which is filled with a layer of ultra-high molecular weight polyethylene with a molecular weight of 1.5·106g/mol ÷ 10,0·106g/mol, the volume of backfill cotroversial based on the final height of the compact layer of polyethylene, selected from 1.5 to 20.0 mm, the cross section of the mold and density ultra-high molecular weight polyethylene 0,936 g/cm3, next, the resulting composite is subjected to volumetric compression in the mold and then sintered at a temperature of 160÷210°C, a pressure of 30 kg/cm2and the excerpt for from 15 minutes to 1.5 hours.

The production process was carried out on serial hydraulic presses used for vulcanization of rubber-technical products and manufacture of plastic plates, if necessary specific pressure and temperature created by the heating plates). The minimum temperature and exposure corresponded to a thickness of 1.5 mm, and the maximum - thickness of 20.0 mm

Failure to comply with combinations of the above modes of the method of manufacturing a rubber-plastic plates: temperature, pressure and exposure time, the plates have the marriage in the form of degradation of rubber and polyethylene, as well as defects in the form of pores (negapressure).

Method of making rubber-polymer plates has the following advantages:

a) high performance obtain rubber-polymer plates in comparison with existing technologies;

b) get the specified size of the rubber polymer plates;

C) high amount of adhesion of the rubber to the polymer is about 12 N/mm2;

g) absence of residual the porosity rubber polymeric composition;

e) high strength mounting rubber to the polymer allows you to create more thin (2-3 times) lining rubber polymer plate against the thicker rubber lining plates with comparable loads;

d) when replacing the rubber lining plates on the thinner rubber polymer lining plate can be further enhanced carrozzina resistant lining and there is no accumulation of rocks on the lining.

Rubber-polymer plates made in this way are used as cladding for bins, chutes, feeders, bodies of dump trucks, bucket excavators, cars and various mechanisms in the mining industry; facing various containers, machines and devices for the chemical industry; the cladding of structures subjected to shock load and wear in mechanical engineering, textile and pulp and paper industries.

A method of manufacturing rezinopolimernykh plates, including thermal processing of rubber and polyethylene, characterized in that the mold with adjustable shear deformations laid layer devulcanizing rubber thickness of 1.5÷20.0 mm, evenly on top of which is filled with a layer of ultra-high molecular weight polyethylene with a molecular weight of 1.5·106÷10,0·106 g/mol, the volume of backfill which is calculated based on the final height of the compact layer of polyethylene selected from 1.5 to 20.0 mm, the cross section of the mold and density ultra-high molecular weight polyethylene 0,936 g/cm3, next, the resulting composite is subjected to volumetric compression in the mold and then sintered at a temperature of 160÷210°C, a pressure of 30 kg/cm2and the excerpt for from 15 minutes to 1.5 hours



 

Same patents:

FIELD: rubber technology.

SUBSTANCE: method is characterised by that, a sample is prepared for analysis during the vulcanisation process, for which 25 cm3 of toluene is added to a precise batch of the sample, with subsequent keeping the rubber mixture-toluene for 4 hours, after which gel-sol analysis is carried out. To carry out gel-sol analysis, the obtained system is filtered. The residue is dried until a constant mass is obtained. The content of gel in the system and concentration of polymer in the filtrate is calculated and its characteristic viscosity is determined. A graph is drawn with coordinates of characteristic viscosity - vulcanisation time and gel content - vulcanisation time, and from the character of the obtained graphic dependence the parameters of the vulcanisation process are determined. Two regions on the graph of the relationship between the characteristic viscosity of solutions and vulcanisation time are marked. On the first region, characteristic viscosity increases during the vulcanisation time of the sample in an almost linear relationship. In this case, the system contains gel, which shows that, in this period there not enough intermolecular transverse bonds in the sample to form a spatial structure, while the increase in characteristic viscosity is only a result of change in the length of caoutchouc macromolecules. The beginning of the vulcanisation process is shown by the increase in the characteristic viscosity of the investigated solution by 5% relative its minimum value. Content of gel increases from 0 to 100% in the second region. At the point with 90% gel content the sample is completely insoluble in toluene.

EFFECT: increased accuracy and efficiency of determining vulcanisation parameters on the initial stage of the process.

3 dwg

FIELD: chemistry.

SUBSTANCE: invention pertains to compositions of ternary copolymers on an isobutylene base and can be used in tyres, in particular in motor car components, such as protectors, inner lining of tyres, air bladders and tubes. The vulcanised elastomer composition contains halogenated ternary copolymer links from C4 to C8 derived from iso-olefin, links from C4 to C14 derived from multi-olefin and links derived from p-alkylstyrol. The composition is vulcanised in the presence of a sulphur vulcanising group. The value of adhesion to butadiene-styrene rubber of the vulcanising composition at 100°C is more than 70 N/mm. The composition also optionally contains filler and/or extra rubber. The suitable fillers are modified carbon black, carbon black, silicon dioxide, aluminium oxide, calcium carbonate, clay, mica, talc, titanium dioxide, starch, wood powder and their combination.

EFFECT: improved adhesion to the frame, elasticity with retention of impermeability to air.

52 cl, 1 dwg, 8 tbl

FIELD: rubber industry.

SUBSTANCE: method comprises mixing sulfur, zinc oxide, stearic acid, tetramethylthiuram disulfide, mercaptobenzothiazole, and carbon black. During the mixing process, a modifier is incorporated, said modifier having been preliminarily prepared via interaction, at 150°C, of 1.66-3.34 wt parts epoxide dian resin "ED-20" and 0.83-1.67 wt parts aniline production bottom waste containing 15-18 wt parts aniline at weight ratio of components 2:1, respectively.

EFFECT: improved physico-mechanical characteristics of rubber and increased adhesion thereof to metal when using chloroprene glues.

5 tbl

FIELD: rubber industry; other industries; compositions for production of the treads of the pneumatic tires and the methods of the compositions production.

SUBSTANCE: the invention is pertaining to the cross-linkable or cross-linked rubber composition characterized by the diminished hysteresis properties in the cross-linked state and by the improved manufacturability in the non-cross-linked state, to the method of its production, to the tread of the pneumatic tire and to the pneumatic tire. The composition contains the reinforcing filler consisting of the reinforcing inorganic filler, and, at least, one diene elastomer. The diene elastomer is produced in the form of the emulsion or the solution. The elastomer produced in the form of the solution has the molar contents of the conjugated dienes links exceeding 30 % and is produced at the following stages. At the first stage the initial diene elastomer is subjected to the reaction of the hydroaluminization or carboaluminization along the chain in the inert hydrocarbon solvent by addition to it of the aluminum-containing agent. At the second stage the produced product is added with, at least, one electron-seeking reagent intended for interaction with the indicated aluminum-containing agent. At the third stage they stop the process of the reaction of the second stage and extract the elastomer containing the functional groups of the carboxylic acid along the chain. The reinforcing inorganic filler is selected from the group including the highly dispersive silica, argil, Al(OH)3. The method of production of the composition includes the first stage of the thermomechanical treatment of the above-indicated elastomer and the reinforcing inorganic filler at the maximal temperature from 130°С up to 200°С, and the second stage of the mechanical working at the temperature smaller than the temperature of realization of the first stage with introduction of the cross-linking system. The diene elastomer received in the emulsion contains the functional groups of the carboxylic acid along the chain and is produced using the emulsifying solution by the method of the copolymerization by the following way. To the indicated emulsifying solution of the monomer or the monomers of the conjugated diene (the conjugated dienes) possibly with one or the several vinyl aromatic compounds add the comonomer consisting of unsaturated aliphatic carboxylic acid taken from the group consisting of the acrylic acid, the methacrylic acid, the maleinic acid, the fumaric acid. The method of production of the above-indicated composition includes the first stage of the thermomechanical working of an above-stated elastomer and the reinforcing inorganic filler, except for the system of cross-linkage at the maximal temperature from 130°С up to 200°С, and the second stage of the mechanical working at the temperature smaller than the temperature of realization of the indicated first stage with addition of the cross-linkage system. In one of the versions of the method the composition includes two phases of the first stage: At the first phase of thermomechanical working they introduce completely the whole amount of the monoxide for activation of the subsequent cross-linkage and intermix all the components, at the second phase they introduce the antioxidant and admix with components of the first phase. In the other version at the first phase of the first stage they introduce zinc monoxide and magnesium monoxide. The invention allows to produce the composition with the improved hysteresis properties in the cross-linking state and the pneumatic tire containing the tread produced from the composition with the reduced resistance to the rolling movement.

EFFECT: the invention ensures production of the composition with the improved hysteresis properties in the cross-linking state and the pneumatic tire containing the tread produced from the composition with the reduced resistance to the rolling movement.

20 cl, 10 tbl, 9 ex

FIELD: organic chemistry, polymers, chemical technology.

SUBSTANCE: invention relates to a composition used for cross-linking and stabilizing a polymer containing hydrolysable silane groups wherein this composition comprises sulfonic acid as a catalyst for condensation of silanols. Invention describes using the composition comprising sulfonic acid as a catalyst for condensation of silanols wherein sulfonic acid represents a compound of the formula (III): ArSO3H (III) or its precursor wherein Ar means hydrocarbyl-substituted aryl group, and compound comprises in total from 14 to 28 carbon atoms and wherein a compound used as a stabilizing agent represents neutral or acidic compound, it doesn't comprise ester groups and represents compound described by the formula (I):

wherein R means unsubstituted or substituted aliphatic or aromatic hydrocarbyl radical that can comprise heteroatoms; R' means hydrocarbyl radical; R'' means hydrocarbyl radical, and R' and/or R'' mean a bulky radical; X1, X2 and X3 are similar or different and represent hydrogen atom (H) of hydroxyl group (-OH) wherein at least X1, X2 or X3 mean -OH; n is in the range from 1 to 4. The composition is used for cross-linking and stabilizing a polymer comprising hydrolysable silane groups. Invention provides enhancing resistance of polymer against aging, absence of mercaptan or other odor and formation of cracks in material.

EFFECT: valuable properties of composition.

24 cl, 4 tbl

FIELD: chemistry of polymers, chemical technology.

SUBSTANCE: invention relates to a method for preparing thermoelastomers based on polyolefins and triple ethylenepropylene-diene rubber. The composition is prepared by the complete dynamic vulcanization of mixture of the following components, mas. p. p.: TSEPDR, 100.0; polypropylene, 25-60; low density polyethylene, 1-10; oil, 20-100; sulfur-accelerating vulcanization comprising the following components: sulfur, 0.1-2.0; thiuram, 0.1-1.5; Altax, 0.1-0.5; stearic acid, 0.1-20.0; zinc oxide, 0.5-8.0, or peroxide vulcanization comprising the following components: dicumene peroxide, 0.1-2.0; bis-maleimide, 0.1-2.5; novolacs alkylphenolformaldehyde resin, 0.2-10.0; organic phosphite, 0.02-1.0; pigment, 0.01-2.0; filling agent, 0.1-50.0; antioxidant, 0.1-2.0, and phthalate plasticizers, 0.5-10.0. The content of oil, polyethylene, phthalate plasticizers, novolacs resin and polypropylene is bound by the ratio. Invention provides enhancing thermostability, resistance against multiple temperature effects during the technological processing, resistance against harmful catalytic effect of metal with transient valence and improving the ecology of the process. Invention can be used in making elastic, atmosphere-resistant materials used in building industry, cable, automobile and light industries and in manufacturing different goods for consumption.

EFFECT: improved preparing method, valuable technical properties of composition.

30 cl, 4 tbl, 23 ex

FIELD: organic chemistry, polymers, chemical technology.

SUBSTANCE: invention relates to new high-molecular cross-linked polyvinyl butyrals, to a method for their synthesis and to their applying also. Invention describes high-molecular cross-linked polyvinyl butyrals prepared by cross-linking polyvinyl butyral with diethyl- and/or dimethyl oxalate. Method for preparing indicated polyvinyl butyrals involves addition of a cross-linking agent and, if necessary, a plasticizing agent to the parent polyvinyl butyral, homogenization of the mixture and thermal cross-linking at temperature from 80°C to 280°C. Polyvinyl butyrals prepared by such method are components of films useful for manufacturing the triplex. Films made by using such polyvinyl butyrals show the rupture strength value at the level 29 N/mm2 and glasses made of such films show stability against the impact in F- and Sn-directions as 8 and 4, respectively.

EFFECT: improved preparing method, improved and valuable properties of films.

9 cl, 2 dwg, 13 ex

FIELD: polymer materials.

SUBSTANCE: composition comprises polyolefin A, containing anhydride function and having viscosity at least 20 g/10 min measured at 190°C and loading 2,16 kg, and epoxy function-containing product B destined for cross-linking polyolefin A. Relative proportions of A and B are such that for each epoxy function there are from 0.1 to 1.5 anhydride functions. Composition can be used in slush molding process, in thermal molding of sheets, or in on-rod casting process.

EFFECT: increased flowability resistance and wear resistance.

6 cl, 1 tbl, 6 ex

The invention relates to a structurally-modified water-soluble polymers that can be used for clarification of organic compounds obtained by polymerization in an aqueous solution of monomers

The invention relates to a device for receiving the sheet of polymeric materials in vertical forms

FIELD: technological processes.

SUBSTANCE: invention is related to the method of films production with thickness that lies in the range from 20 micrometer to 1,000 micrometer from thermoplastic materials by means of plastic extrusion via wide slotted head and smoothening of melted film. Film passes from wide slotted head into calender that contains at least three or four shafts. At that the first pair of shafts forms smoothening gap that is intended for retention of melted film. Melted film is then passed, after gap of specified calender, through the following smoothening gap or following pressing gap. Proportion of head slot width and film thickness lies in the range of 1:1-6:1. At that quotient from division of film cloth rate in the following smoothening gap or following pressing gap by rate of film cloth in smoothening gap, which is formed by the pair of shafts, lies in the range from 0.8 to 1.00.

EFFECT: provision of production of film from thermoplastic materials with different surface effect and high mechanical loads at the account of low molecular orientation of produced films.

10 cl, 3 dwg, 1 ex

FIELD: technological processes.

SUBSTANCE: present invention relates to the technology of modifiers production on the basis of nuclear-shell type particles used for production of molding such as films, pipes, mirror housings etc. from poly(meth)acrylates. The nuclear-shell type particle consists of a nucleus, the first shell and, if required, the second shell that on every single case consist of alkylmetacrylate and styrene recurring units with minimum glass-transition temperature of 30°C. The said particles are produced by multistage emulsion polymerisation.

EFFECT: invention ensures implementation of the process with minimum labour costs and small investments for commercial deployment.

15 cl, 2 tbl

FIELD: building.

SUBSTANCE: stated invention relates floor covering of synthetic formless marble and its production method, and in particular to floor covering of formless marble on base of synthetic pitch, made with formless marble picture. Technical result is reached with production method of floor covering of formless marble, including stage of compound agitation on base of synthetic pitch with self-cloured pieces of different colours and primary rolling of agitated compound with creation of primary rolled sheet. Then primary rolled sheets are laminated with its cutting till stated dimension and rotation. Then second rolling of laminated sheets is made with the help of low-temperature calendaring at the temperature from 60 to 100°C with creation of channeled stripes on sheet surfaces. Roughened surface of secondary rolled sheets created in result of low temperature calendaring along with channeled stripes are filled with the help of double blocking system. At that first blocking unit includes roller which can create any type of blocking, including blocking in longitudinal direction.

EFFECT: creation of floor covering of formless marble having more high level of durability to colouring and surface durability, as well as stretched stripes of formless marble and glazed surface, and production method of such covering.

5 cl, 4 dwg, 1 ex

FIELD: packaging materials, particularly thin laminated sheets.

SUBSTANCE: method involves extruding polymeric film in downwards direction and supplying thereof in nip between cooling roller and opposite roller; connecting polymeric film with at least one layer of packaging material in said nip; applying covering made as surface layer of aqueous composition containing dry substance on cooling roller; transferring said surface layer on hot polymeric film in the nip. System for packaging laminated sheet production comprises extruder, cooling roller, opposite roller, means to deliver at least one layer of packaging laminated material in nip defined by the rollers and means to apply surface layer on cooling roller.

EFFECT: decreased surface layer thickness and improved barrier properties of packaging laminated sheet.

16 cl, 1 dwg, 1 tbl, 1 ex

FIELD: chemical industry; other industries; medicine; methods of manufacture of the perforated three-dimensional film used in medicine.

SUBSTANCE: the invention is pertaining to manufacture of the perforated film used in medicine. The method of manufacture of the perforated three-dimensional film includes formation of the three-dimensional topographic unit of the substrate, placing of the film along the glyptic exterior surface of the component of the substrate, and deformation of the film, so that its shape corresponded to the external surface of the component of the substrate. Relocating the laser beam along the external surface of the treated detail they form the topographic component of the substrate at modulation of the radiated power of the laser beam between, at least, of three power levels, thus hewing the external surface of the treated detail for formation of the three-dimensional topographic component of the substrate. Predominantly the modulation is exercised by means of the control unit, which adjusts the radiated power of the laser beam according to the succession of previously set commands.

EFFECT: the invention ensures the reliable manufacture of the perforated three-dimensional film used in medicine.

14 cl, 28 dwg

FIELD: chemical industry; equipment for production of the polymeric materials.

SUBSTANCE: the invention is pertaining to the equipment for production of the polymeric materials, in particular, to the devices for production of the biaxially-oriented thermo-shrinkable film made on the basis of the polyvinyl chloride (PVC). The technical result of the invention is the improved quality of the thermo-shrinkable film made on the basis of PVC produced as the result of the biaxial orientation. The given result is reached by that in the installation for production of the biaxially-oriented shrinkable film made on the basis of the PVC, containing the sequentially installed extruding machine with the forming head, the nozzle with the central air supply, the cylindrical section counterpressure chamber with the connecting pipe for feeding of the working substance and the annular outlet channel, the gear of regulation of the working substance pressure in the counterpressure chamber, the thermostating jacket, the nip rolls and the reeling tool. At that the installation additionally has the gage device for the repeated biaxial orientation of the polymeric tubular films made on the basis of PVC containing the fittings for feeding and distribution of the hot heating medium and the counterpressure chamber.

EFFECT: the invention ensures the improved quality of the thermo-shrinkable film made on the basis of the polyvinyl chloride produced as the result of the biaxial orientation.

2 dwg

FIELD: chemical industry; methods of reprocessing of the polymeric materials.

SUBSTANCE: the invention is pertaining to reprocessing of the polymeric materials, in particular, to production of the opal polymeric film by the method of extrusion of the melt through the plano-slit die. The method of production of the opal polymeric film includes the incoming inspection of the source polymeric material, setting of the temperature mode and the speed of the extrusion of the melt polymeric material, the process of extrusion through the plano-slit die, the extrudate cooling and its matting by stamping. The matting process begins before transition of the being cooled extrudate in its solid phase. The invention ensures production of the polymeric film with the improved uniformity of the matting.

EFFECT: the invention ensures production of the polymeric film with the improved uniformity of the matting.

2 cl, 3 dwg, 1 tbl, 10 ex

FIELD: chemical industry; methods of production of the piezofilm materials.

SUBSTANCE: the invention is pertaining to the method of production of the piezofilm materials out of the high-molecular thermoplastic polymers, copolymers and their mixtures. The piezofilm materials may be used in the different kinds of the instruments and devices. The method provides for production of the non-oriented film, operations of its orientation, polarization, action of the ionizing radiation and the repeated polarization. Then the polarized film is additionally exposed to the action of ultraviolet irradiation before and-or after the ionizing radiation with the subsequent polarization after each kind of action. The technical result of the invention is improvement of the energy parameters of the produced material.

EFFECT: the invention ensures improvement of the energy parameters of the produced material.

5 tbl, 5 ex

FIELD: chemical industry; methods of production of the piezofilm materials.

SUBSTANCE: the invention is pertaining to the method of production of the piezofilm materials out of the high-molecular thermoplastic polymers, copolymers and their mixtures. The piezofilm materials may be used in the different kinds of the instruments and devices. The method provides for production of the non-oriented film, operations of its orientation, polarization, action of the ionizing radiation and the repeated polarization. Then the polarized film is additionally exposed to the action of ultraviolet irradiation before and-or after the ionizing radiation with the subsequent polarization after each kind of action. The technical result of the invention is improvement of the energy parameters of the produced material.

EFFECT: the invention ensures improvement of the energy parameters of the produced material.

5 tbl, 5 ex

FIELD: processes of making laminate drawn and sealed flat films for making sealed tubular films, possibly, for making envelopes and packages for food products.

SUBSTANCE: flat film includes two sealed surface layers formed at least of one copolyamide and at least of one amorphous polyamide and (or) at least of one homopolyamide and(or) at least of one modified polyolefin. Such film is highly impermeable to steam and oxygen.

EFFECT: enhanced strength of film sealed joint.

26 cl, 3 ex

FIELD: transportation.

SUBSTANCE: method of shaping and vulcanization of tires for vehicle wheels includes such stages: installation of unvulcanised tire on the toroidal abut, having external surface which form to a great extend corresponds of the inner surface form of unvulcanised tire. Then one heats the toroidal abut for heat transmission to the inner surface of the tire, which contacts the toroidal abut, and presses of inner surface of unvulcanised tire to external surface of toroidal abut, at least, with the help of one secondary operational fluid environment under pressure. External surface pressure of unvulcanised tire to the walls of shaping hollow, made in vulcanisating press-form, with the help of primary operational fluid environment under pressure. Stated primary operational fluid environment under pressure passes, at least, one diffusion space between external surface of toroidal abut and inner surface of unvulcanised tire. Then primary operational fluid environment under pressure is heated for heat supply to unvulcanised tire for its vulcanisation. Variants of device, including vulcanising press-form with heat facility of unvulcanised tire, are used for fulfillment of stated method of invention.

EFFECT: equal distribution of elastic material in press-form and elimination of work defects as result of connection.

26 cl, 5 dwg

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