Compound for realisation of modified bitumen for asphalts

FIELD: chemistry.

SUBSTANCE: group of inventions relates to polymer chemistry and is used in production of asphalt road surface. Method comprises grinding vulcanised rubber to obtain vulcanised crumb rubber with grain size less than 0.4 mm. Method includes mixing of vulcanised crumb rubber, SBS and lubricant inside an extruder. Weight percentage of lubricant is between 1 % and 50 % with respect to weight of mixture, and vulcanised crumb rubber is in weight percentage 70–100 % with respect to SBS weight. SBS is a polymer of linear, radial types or mixture thereof. Rubber crumb is obtained from processed tyres. Lubricant is a mineral oil. At temperature of 160–200 °C extrusion mixture is carried out to produce a compound, containing rubber crumbs, SBS and lubricating compound.

EFFECT: extruded compound is cut into chips and added to bitumen in weight ratio of 5 % and 30 % in relation to total weight of modified bitumen.

10 cl, 5 tbl



Same patents:

Bitumen composition // 2556925

FIELD: chemistry.

SUBSTANCE: invention relates to bitumen compositions and can be used for obtaining bitumen compositions, applied in road and airfield construction. Bitumen composition includes mixture of oxidised bitumen with unoxidised oil petroleum product, with application as unoxidised oil petroleum product of heavy gasoil of catalytic cracking with ratio, respectively, oxidised bitumen:heavy gasoil of catalytic cracking 95-99:5-1 wt %, with heavy bitumen having softening point equal or higher than softening point of final product.

EFFECT: result consists in simplification of bitumen composition formulation with obtaining bitumen with improved quality characteristics, in particular penetration at 0°C, without losing resistance to ageing by index of change of softening point after warming-up.

2 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: invention relates to field of producing compositions, which include modified sulphur, which can be applied for production of building materials - sulphuric concretes and sulphur-asphalt concretes, applied in different fields of building, including transport, hydrotechnical, hydromeliorative, etc. Method of obtaining modified sulphur consists in the fact, that melted sulphur is supplied into reactor at temperature 120-135°C, after that, salts of ammonium and/or potassium are introduced into reactor in quantity from 0.001 to 0.005 wt % of sulphur weight, mixed for 5-10 minutes, after which 5-ethylene-2-norbornen is introduced in quantity from 0.08 to 0.1 wt % of sulphur weight with further mixing for 20-50 minutes.

EFFECT: stabilisation of product takes place, reaction of modification becomes non-reversible, and destruction is absent.

2 tbl, 5 ex

FIELD: construction.

SUBSTANCE: bulk additive for asphalt-concrete mixture, containing (wt %): thermoplastic polymer 71-90, ethylene copolymer, having at least one of the following functional groups: hydroxyl, carboxyl, carbonyl and epoxy 1-28, cellulose fibre 0.5-20. Bulk additive for asphalt-concrete mixture, characterized by the fact that it is obtained by processing the aseptic cardboard package Tetra Pak and contains (wt %): polyethylene 75-88, ethylene copolymer with methacrylic acid 6-15, cellulose fibre 2-10, granulated aluminium foil 2-20. Asphalt-concrete mixture, containing (wt %): rubble of fractions of 5-40 mm 38-80, sand 5.0-53, mineral powder 3.8-20, bitumen 4.0-7.5, granular additive 0.4-1.0 indicated above.

EFFECT: simplification of technology, increase of strength, increase of resistance to cyclic loads.

6 cl, 4 tbl

FIELD: chemistry.

SUBSTANCE: invention refers to bitumens, particularly bituminous-polymer compositions used in industry and/or road construction. Producing a bitumen/polymer composition uses a mother solution free from mineral oil, containing at least one herbal and/or animal oil, copolymer 20 to 50 wt % based on conjugated diene units and aromatic monovinyl hydrocarbon units, in relation to the mother solution weight, containing or free from at least one cross-linking agent, wherein the above herbal and/or animal oil is an acid; an acid value measured according to NF EN ISO 660 standard makes from 50 to 300 mg potassium hydroxide/g.

EFFECT: this mother solution characterised by the very high concentration of the polymer is stable and does not gelatinise that enables dissolving and using it for producing the cross-linked bitumen/polymer compositions and then bitumen mixtures.

15 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: method is carried out via atmospheric oxygen oxidation of a mixture of tar or a product of mixing tar with a 5th vacuum cut of a masout vacuum distillation apparatus with asphaltite from the process of propane deasphalting of tar with the ratio of tar or product of mixing tar with a 5th vacuum distillation cut:asphaltite of 30:70 to 50:50 wt %, followed by blending the oxidised asphaltite-containing mixture with straight-run tar, with the ratio of the oxidised mixture:tar of 55:45 to 40:60 wt %, to obtain an end product of the required quality.

EFFECT: method enables to obtain high-quality road bitumen of different classes, recycle asphaltite - a by-product of the process of propane deasphalting of tar.

2 cl, 2 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: method includes oxidising bitumen raw material with relative viscosity RV580=60÷100c to obtain a well-oxidised product with a melting point in the range of 80-110°C, followed by blending thereof with straight-run tar RV58060c in concentration of 45-60 wt % to obtain the desired road bitumen with elasticity of not less than 35%.

EFFECT: improved longevity.

1 tbl, 3 ex

FIELD: process engineering.

SUBSTANCE: invention relates to construction materials and can be used for road construction, roofing, insulating and sealing jobs. In compliance with this invention, the mix of rubber chips and bitumen is activated by ultrasound at the following ratio, wt %: rubber chips - 13-15, bitumen making the rest. If required, rubber chips are introduced to bitumen heated to 180°C in the mixer. Said mix is missed for at least 10 minutes and activated by ultrasound unless rubber-bitumen compound results.

EFFECT: better softening and brittleness temperatures under severe climatic conditions.

7 cl, 1 tbl, 9 ex

FIELD: chemistry.

SUBSTANCE: invention relates to additives for use in bitumen and polymer-modified bitumen. The additive is obtained by mixing the following: (a) sulphur, (b) vulcanised rubber, e.g. vulcanised rubber wastes, (c) a fatty acid and (d) bitumen.

EFFECT: use of said additive to obtain, for very limited gas emissions, an elastomer-containing bitumen product which is particularly suitable for producing bitumen-coated material with improved processing properties, such as asphalt concrete.

13 cl, 1 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to production of road construction materials and can be used in repairing airfield and road surfaces, particularly for rapid and emergency restoration of damaged areas on asphalt pavements. A cold bitumen-mineral mixture, which contains mineral filler and binder, which includes bitumen, diesel fuel, tall oil and polyethylene polyamine, where the binder further includes fine wollastonite with particle size of 40-100 mcm, and the mineral filler used is any rock material with strength of not less than 60 MPa and grain size of 3-8 mm or 5-10 mm, with the following ratio of components, wt %: road bitumen 3.0-3.8, diesel fuel 0.8-1.3, tall oil 0.22-0.23, polyethylene polyamine 0.02-0.03, fine wollastonite 0.12-0.45, rock material - the balance.

EFFECT: high moisture resistance.

2 tbl

FIELD: chemistry.

SUBSTANCE: invention refers to a method for producing cross-linked compositions of a polymer and bitumen with using no linking agent. The method for preparing the cross-linked compositions of the polymer and bitumen with using no linking agent provides at least one bitumen and at least one polymer composition containing at least 80 wt % of the polymer composition weight, diblock copolymer of monovinylaromatic hydrocarbon block and linked diene block having a molecular weight of 80000 g/mole or more and containing double-bond links in position 1-2 originating from the linked diene of 1.5% or more of the total weight of the linked diene links come in contact at 180°C to 220°C for a period of time of 8 h to 48 h. There are also declared versions of the method, versions of the cross-linked compositions of the polymer and bitumen, the method for producing the cross-linked stock solution with using no linking agent, and the cross-linked stock solution.

EFFECT: producing the cross-linked compositions of the polymer and bitumen possessing the equivalent or improved properties as compared to the compositions containing the linking agent.

25 cl, 3 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to a pneumatic object. Pneumatic object is described which is provided with an elastomeric layer which is impermeable for inflating gas, wherein said impermeable elastomeric layer contains at least one thermoplastic styrene elastomer with block polyisobutylene, characterised by that said impermeable elastomeric layer additionally contains plasticising oil in amount of more than 5 to less than 150 phr (weight parts per 100 parts elastomer) and polyphenylene ether (PPE), where the polyphenylene ether is selected from a group consisting of poly(2,6-dimethyl-1,4-phenyl ether), poly(2,6-dimethyl-co-2,3,6-trimethyl-1,4-phenyl ether), poly-(2,3,6-trimethyl-1,4-phenyl ether), poly(2,6-diethyl-1,4-phenyl ether), poly(2-methyl-6-ethyl-1,4-phenyl ether), poly(2-methyl-6-propyl-1,4-phenyl ether), poly(2,6-dipropyl-1,4-phenyl ether), poly(2-ethyl-6-propyl-1,4-phenyl ether), poly(2,6-dilauryl-1,4-phenyl ether), poly(2,6-diphenyl-1,4-phenyl ether), poly(2,6-dimethoxy-1,4-phenyl ether), poly(1,6-diethoxy-1,4-phenyl ether), poly(2-methoxy-6-ethoxy-1,4-phenyl ether), poly(2-ethyl-6-stearyloxy-1,4-phenyl ether), poly(2,6-dichloro-1,4-phenyl ether), poly(2-methyl-6-phenyl-1,4-phenyl ether), poly(2-ethoxy-1,4-phenyl ether), poly(2-chloro-1,4-phenyl ether), poly(2,6-dibromo-1,4-phenyl ether), poly(3-bromo-2,6-dimethyl-1,4-phenyl ether), corresponding copolymers thereof and mixtures of said homopolymers or copolymers, and that the weight fraction of the polyphenyl ether ranges from more than 0.05 to less 5 times the weight fraction of styrene present in the thermoplastic styrene elastomer itself.

EFFECT: improved heat resistance and gas-impermeability of the gas-impermeable layer of the pneumatic object.

16 cl, 1 dwg, 3 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention refers to an elastomeric thermoplastic composition having a compression resistance at a temperature of 20°C to 100°C containing hydrated styrene-butadiene thermoplastics. The thermoplastics forming the above composition are linear or radical, are characterised by the vinyl content of 35.8 to 60 wt %, the styrene content of 30 to 41 wt %, a molecular weight of 200,000 to 600,000 and the Brookfield viscosity at 5 wt % in cyclohexane of less than 300 cP. What is also described is a method for producing the composition, the product prepared by pressure casting or extrusion of the composition.

EFFECT: good processibility, adequate compressive strength of the non-vulcanised and vulcanised compositions.

33 cl, 4 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a thermofusible composition based on a thermoplastic elastomer. The thermofusible composition is in the form of a powder and/or in the form of micropellets, with a particle size of 1400 mcm, comprising 40-70 wt % selectively hydrogenated block copolymer (HSBC); 8.5-15 wt % of a propylene homopolymer and/or propylene copolymer; 1-30 wt % of a butylene homopolymer, of a butylene homopolymer or a combination of the butylene homopolymer and the butylene copolymer and 7.7-20 wt % of a plasticizing oil selected from naphthenic oils and paraffinic oils, wherein the HSBC (i) is a linear or branched hydrogenated block copolymer having the general configuration A-B-A, (A-B)n, (A-B-A)n, (A-B-A)nX, (A-B)nX, or mixtures thereof, where n is an integer from 2 to about 30, and X - is coupling agent residue and wherein a) prior to hydrogenation each A block is a mono alkenyl arene polymer block, and each B block is a controlled distribution copolymer block of at least one conjugated diene and at least one mono alkenyl arene; b) subsequent to hydrogenation about 0-10% of the arene double bonds and at least about 90% of the conjugated diene double bonds have been reduced; c) each A block has a number average molecular weight from about 5.0-7.5 kg/mol, and, wherein the linear HSBC has a total apparent number average molecular weight from about 70 to 150 kg/mol, and the branched HSBC has a total apparent number average molecular weight from about 35 to 75 kg/mol and the branched HSBC has a total apparent number average molecular weight from about; d) each B block comprises terminal regions adjacent to the A blocks that are rich in conjugated diene units and one or more regions not adjacent to the A blocks that are rich in mono alkenyl arene units; e) the total amount of mono alkenyl arene in the hydrogenated block copolymer is from about 20 to 45 wt %; f) the amount of mono alkenyl arene in each B block is from about 10 to 40 wt %; g) each B block has a styrene blockiness index of less than 10% and h) the weight percent of vinyl in each B block is at least about 40 wt %.

EFFECT: composition can be used at lower processing temperatures and reduced cycle times in conventional equipment.

18 cl, 3 dwg, 6 tbl, 11 ex

FIELD: chemistry.

SUBSTANCE: invention relates to formulation of a rubber mixture using surface-modified technical carbon and can be used in manufacturing tyres for passenger, cargo and racing cars. The composition of the tyre compound consists of surface-modified technical carbon and a functionalised polymer containing functional groups along the polymer chain. The functionalised polymer includes soluble butadiene-styrene rubber. The functional groups of the polymer include carboxyl or hydroxyl functional groups.

EFFECT: invention enables to obtain rubber with very low hysteresis and rolling resistance, improved adhesion with a wet road and excellent wear resistance.

21 cl, 11 dwg, 13 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a method of obtaining a functionalised polymer. The method includes the interaction of a polymer with active end groups with a compound, which contains an aryl group with at least one directly bound substituent OGP, where Gp is a protective group, and a substituent (Q), which is free from active hydrogen atoms and represents a group which includes a multiple bond carbon-nitrogen or is bound with the said aryl group through such a group.

EFFECT: improvement of the polymer physical-mechanical properties.

10 cl, 30 tbl, 169 ex

FIELD: chemistry.

SUBSTANCE: invention relates to functionalised multi-branched polymers which include a reaction product of a cross-linking agent and a polymer synthesised by anionic polymerisation and subsequently hydrolysed, a synthesis process thereof and different versions of use thereof.

EFFECT: structure of polymers disclosed herein provides the polymers with improved processing properties and makes said polymers suitable for use in hot-melt adhesives.

16 cl, 8 tbl

FIELD: chemistry.

SUBSTANCE: invention includes a method of conducting polymerisation to obtain a polymer containing styrene and 1,3-butadiene monomer units, where said method includes: (A) feeding less than 60 wt % of the total amount of butadiene used in polymerisation into a reactor containing all the amount of styrene used in polymerisation, and a solvent; (B) feeding at least one initiator into the reactor and providing conditions for the reaction to occur over a time t; (C) feeding the remaining amount of butadiene into the reactor in two or more separate feeds; and where for each subsequent feeding of butadiene, the amount of the fed butadiene is less than the amount of butadiene fed into the reactor immediately before said feeding, or is equal to the amount of butadiene fed into the reactor immediately before said feeding. For each butadiene feed, the butadiene is fed over a time tnc and after each feed, the reaction is carried out over a time tnr, where n is the number of butadiene feeds, and where the polymer contains polymer chains having higher styrene content in a direction towards the middle of the polymer chains, and lower styrene content at the ends of the chains. The invention includes a polymer, a composition for articles and an article.

EFFECT: obtaining a special rubber structure.

22 cl, 9 tbl, 2 dwg, 1 ex

FIELD: chemistry.

SUBSTANCE: method of obtaining in solvent mixture of nanoparticles and liquid polymer, synthesised in one reactor, is described, with method containing the following stages: (a) carrying out either polymerisation of first monomer until liquid polymer is obtained, or copolymerisation of first monomer and second monomer until liquid polymer is obtained, in reaction container, where first monomer is selected from group, consisting of C4-C8 -conjugated dienes and their mixtures, and second monomer is selected from group, consisting of styrene, α-methylstyrene, 1-vinylnaphthaline, 2-vinylnaphthaline, 1-α-methylvinylnaphthaline, 2-α-methylvinylnaphthaline, vinyltoluol, methoxystyrene, tert-butoxystyrene and their alkyl, cycloalkyl, aryl, alkaryl and aralkyl derivatives, in which total number of carbon atoms in derivative in not larger than 18, or any di- or tri-substituted aromatic hydrocarbons and their mixtures; (b) partial stop of polymerisation by application of agent for inhibition of active centres; and (c) addition of polyfunctional comonomer, monovinylaromatic monomer and optional loading of polymerisation initiator; where said nanoparticles have core, which includes monovinylaromatic monomer, and shell, including first monomer or first and second monomer, with nanoparticles being formed as a result of self-aggregation into micelles and cross-linking of micelles by polyfunctional comonomer. Also described is method of obtaining caoutchouc composition, with method including: obtaining described above mixture of nanoparticles and liquid polymer and adding mixture to caoutchouc composition. Method of tyre manufacturing with application of nanoparticles and liquid polymer is described, with method including: obtaining described above mixture of nanoparticles and liquid polymer, adding mixture to caoutchouc composition; formation of tyre tread from caoutchouc composition; and constructing tyre with application of said tread. Composition of substances for application on caoutchouc composition, obtained in accordance with method described above, is described. Said composition, in fact, consists of: micellar nanoparticles, belonging to "core-shell" type, where nanoparticles are formed as a result of self-aggregation into micelles and cross-linking of micelles by polyfunctional comonomer; and liquid polymer, which is characterised by Mw value in the range from approximately 10000 to approximately 120000; where nanoparticles are dispersed and mixed inside liquid polymer.

EFFECT: simplification of method of obtaining mixture of nanoparticles and liquid polymer and their further processing.

22 cl, 2 dwg, 4 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: invention relates to production of synthetic rubbers, in particular diene (co)polymers, such as polybutadiene, polyisoprene and styrene-butadiene rubber (SBR), used in production of tyres and industrial rubber articles, in modifying bitumens, in electrical engineering and in other fields. Described is a method of producing (co)polymers which is carried out in two parallel reactors, in each of which dienes are polymerised or copolymerised with each other and/or with arylvinyl compounds. An organolithium initiator, an electron donor additive and a branching agent are fed into the first reactor, and an organolithium initiator, an electron donor additive and a functionalising agent are fed into the second reactor. The polymerised mixtures obtained in the first reactor and the second reactor are mixed with each other and a chain termination reaction is then carried out.

EFFECT: obtaining said branched compounds that are characterised by a statistical distribution of monomer units, high content of vinyl units, a narrow molecular mass distribution and a controlled content of branched and functionalised parts in the copolymer.

15 cl, 20 ex

FIELD: chemistry.

SUBSTANCE: flame-extinguishing polymer composition contains a combustible polymer mixed with a bromated flame-extinguishing additive selected from one or more compounds given below: (i) a copolymer containing styrene and 2,3-dibromopropylmaleimide repeating units; (ii) a bromated polyester containing bromine atoms bonded with aliphatic groups; (iii) an allyl ether which is bromated on a novolac resin ring; (iv) 3-bromo-2-hydroxypropyl ether of novolac resin; (v) 2,3-dibromopropyl ether cresol-novolac resin, and (vi) a bromated polymer or a copolymer obtained via ROMP.

EFFECT: stability of the flame-extinguishing additive at high temperatures, low toxicity and avoiding significant loss of physical properties of the polymer during use thereof.

7 cl, 10 ex

FIELD: manufacture of materials changing physical, chemical and mechanical properties of road, bridge and airfield pavement components.

SUBSTANCE: proposed binder for road pavement contains mixture of bitumen, block copolymer of diene and styrene and additives in form of improved paving bitumen. Craton is used as block copolymer of diene and styrene and oil fraction obtained from direct refining of heavy low-paraffin naphthene base is used as additive; it is characterized by kinematic viscosity at +50°C from 65 to 85 cSt, solidifying temperature below -18°C; binder is characterized by tensibility more than 70 cm at +25°C, elasticity more than 70% at +25°C, softening temperature more than 65°C and viscous-flow state at 135°C.

EFFECT: improved physico-mechanical properties of bitumen pavement.

4 tbl