Method of preparing rubber compound based on ethylene/propylene/diene rubber

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

 

The invention relates to the rubber industry, in particular to a method for producing rubber mixtures based on ethylene-propylene rubber, which is characterized by high adhesion performance.

Known rubber compound, which is obtained by mixing the ethylene-propylene-diene rubber, filler, plasticizer and adhesion additives, which uses thermal decomposition of the ethylene-propylene or ethylene-propylene-diene rubber (USSR Author's certificate No. 765307, CL 08L 23/16; Publ. 23.09.80).

However, with this method it is necessary to carry out the process of thermal decomposition of ethylene-propylene or ethylene-propylene-diene rubber in the reactor autoclave type, which complicates the technology.

Known vulcanizate rubber compound based on unsaturated rubber (Sept)containing adhesive additive - ORGANOMETALLIC compound of the formula: (organic ligand)-Nickel (anion) (Patent No. 572207, CL 08L 9/00; Publ. 05.09.77).

However, this method requires additional refining rubber mixture after mixing in a rubber mixer, which complicates the technology.

The closest is a method for rubber mixtures based on ethylene-propylene-diene rubber is a mixture of ethylene-propylene-diene rubber with sulfur, tetramethylthiuram what lividum, mercaptobenzothiazole, zinc oxide, stearic acid and technical carbon (Koshelev FF and other General technology of rubber. M.: Chemistry, - 1978. s).

However, this method of obtaining a rubber mixture of the vulcanizates based on it have low physical and mechanical properties.

Task: to develop a method of producing a rubber mixture based on ethylene-propylene-diene rubber vulcanizates on the basis of which are characterized by improved physical and mechanical properties and high adhesion to metal.

The technical result is to develop a method of producing a rubber mixture based on ethylene-propylene-diene rubber vulcanizates on the basis of which are characterized by improved physical and mechanical properties and high adhesion to metal using chloroprene adhesives brands SA and NT, disposal of waste petrochemical production (aniline).

The technical result is achieved in that in a method of producing a rubber mixture based on ethylene-propylene-diene rubber comprising a mixture of sulfur, zinc oxide, stearic acid, tetramethylthiuramdisuphide, mercaptobenzthiazole and carbon black, in the process of mixing impose additional modifier, previously obtained as a result of interaction at 150°With over 5 hours of 1.66-334 parts by weight of epochs the ne Dianova resin ED-20 and 0,83-1,67 parts by weight of distillation of the waste production of aniline, aniline content 15-18 parts by weight of a mass ratio of 2:1, respectively, in the following ratio of components, parts by weight: ethylenepropylene rubber - 100,0, sulfur - 2,0, zinc oxide - 5,0, stearic acid - 1,0, carbon - 100,0-70,0, tetramethylthiuramdisulphide - 1,5-1,0, mercaptobenzthiazole - 0,5-1,0, modifier - 2,5-5,0.

Ethylenepropylene rubber, SKEPT-40 (TU 38.103252-92).

Sulfur - vulcanizing agent (GOST 127.4-93).

Zinc oxide as an activator of a vulcanization accelerator (GOST 202-84).

Stearic acid - a vulcanization activator (GOST 6484-96).

Carbon black P-514 - filler (GOST 7885-86).

Tetramethylthiuramdisulphide (thiuram D) - of a vulcanization accelerator (GOST 740-76).

Mercaptobenzthiazole (captax) of a vulcanization accelerator (THE 113-00-05761631-23-91).

The pre-modifier receive a direct interaction epoxy Dianova resin ED-20 kovovymi waste production of aniline (KPA) mass ratio of 2:1, at 150°C for 5 hours. The modifier is a fragile granules of irregular shape and is cheap material, KPA are waste resulting from the production of aniline (TR production of aniline CJSC "Orgsintez" Volzhskiy city, phase selection trademarks of aniline). KPA represent (parts by weight): aniline 15-18, cyclohexylamin - 0-10, tolui is Jn (solvent) - 2-4, sodium hydroxide (filler) - 1-3, diphenylamine - 3-20, metaphenylenediamine - 1-3, o-, n-aminophenol - 1-6, high molecular weight resinous substances (reagents interacting with rubber) - 6 : 45 a.m.

It is established that the reason for increasing the adhesion performance of the vulcanizates is the increase in the content of polar functional groups by introducing into the rubber compound of the proposed modifier.

When used as a modifier of epoxy Dianova resin ED-20 and distillation waste of aniline in a mass ratio of 2:1 improved physical-mechanical and adhesive properties of vulcanizates based on the proposed rubber compound. When changing the component ratio of the modifier, it becomes viscous, which makes its introduction in the rubber mixture, with reduced adhesive properties of vulcanizates based rubber compound.

An example of the preparation of the rubber mixture.

The rubber mixture based on ethylene-propylene-diene rubber containing sulfur, zinc oxide, stearic acid, carbon black, tetramethylthiuramdisulphide, mercaptobenzthiazole, prepared in the mill at a temperature of rolls 65-70°C. the Duration of mixing for 25 minutes. In the process of mixing in the mill in the rubber mixture further added modifier, previously obtained by the interaction of paxinou diaolou resin ED-20 kovovymi waste production of aniline in a mass ratio of 2:1 at 150° C for 5 hours, distillation wastes contain 15-18 parts by weight of aniline. Then carry out the vulcanization of the rubber mixture at a temperature of 160°C for 30 minutes.

Get rubber compound 1-6, the compositions of which are given in table 1.

The composition of the modifier are shown in table 2.

Table 3 shows the physico-mechanical properties of vulcanizates based on the proposed rubber mixtures and the prototype.

Technology pasting the following samples. Disposable adhesive to the prepared surface, drying the adhesive film at room temperature (20° (C) for 1-2 minutes, then made a tight pressing of the bonding surfaces.

Table 4 shows the strength properties of vulcanizates based on the proposed rubber mixtures and the prototype made by bonding them with each other chloroprene adhesives brands NT and SA. The data presented in table 4, which shows that best results are obtained when using the compositions 2 and 3. So the shear strength for bonding vulcanized rubber prototype glue NT 0.68 MPa, for bonding vulcanized rubber according to the recipe of composition 3 is of 1.13 MPa.

The stated limits of modifier - 2,5-5,0 due to the fact that when you increase or decrease the indicated dosages adhesive strength when Sleiman is and vulcanizates with each other is reduced, so they are optimal. Adhesion shear was determined on a tensile testing machine MPC-250 (GOST 16971-71).

Further studies performed with compositions 2 and 3.

Also tested adhesive attachment of vulcanizates based compositions 2, 3 and prototype to steel (St3) (Table. 5). Adhesion was determined by the method of separation. Strength under uniform separation was determined by measuring adhesion JI MG4 (TU 4271-005-12585810-01).

From table 5 it is seen that the vulcanizates on the basis of compositions 2 and 3 provide an increase in strength properties of adhesive joints in comparison with the prototype. The strength of the detachment of the adhesive joint when attaching vulcanized rubber prototype to steel adhesive S is 0.9 MPa, and when securing the vulcanized rubber according to the recipe of composition 3 to steel (St3) is 1.35 MPa.

Table 1
The components of the mixtureThe content of the mixture components in the compositions, parts by weight
the placeholder123456
Ethylenepropylene rubber, SKEPT-40100,0100,0100,0100,0100,0100,0100,0
Sulfur2,02,02,02,02,02,02,0
Zinc oxide5,05,05,05,05,05,05,0
Stearic acid1,01,01,01,01,01,01,0
Carbon100,0100,0100,0100,070,070,070,0
Tetramethylthiuramdisulphide1,51,51,51,51,51,51,0
Mercaptobenzthiazole0,50,51,01,01,01,00,5
Modifier-5,02,55,02,55,05,0

Table 2
Components of modifierThe content of the component modifier for rubber
1234 56
Epoxy Dianova resin ED-203,341,663,341,663,343,34
Distillation waste from the production of aniline with aniline content parts by weight of 15-181,670,831,670,831,671,67

Table 3
IndicesThe results of the tests of songs
the placeholder123456
Conventional strength, MPa18,018,119,320,319,718,118,0
Elongation, %140170150140230210230
Hardness, units shore a92919293848385
Temperature limit fragility, °
Tear resistance, kgf/cm46 655450667060

Table 4
Brand glueThe indicator for the composition
The placeholder123456
The shear strength, MPa
NT0,681,041,101,130,850,870,75
SA1,201,611,631,791,451,251,30

Table 5
Brand glueThe indicator for the composition
The placeholderThe proposed composition 2The proposed composition 3
Strength under uniform separation, MPa
SA0,901,281,35

Technical and economic effect, resulting from the application of the rubber mixture based on ethylene-propylene-diene rubber, concludes the I is that its application can significantly increase the strength of attachment of the articles of vulcanized rubber based on ethylene-propylene-diene rubber and at their attachment to the metal surface to improve the physico-mechanical properties of vulcanizates. In addition, its use allows the use of by-product (waste) petrochemical production (aniline).

A method of obtaining a rubber mixture based on ethylene-propylene-diene rubber comprising a mixture of sulfur, zinc oxide, stearic acid, tetramethylthiuramdisuphide, mercaptobenzthiazole and carbon black, characterized in that in the process of mixing impose additional modifier, previously obtained as a result of interaction at 150°C for 5 h 1,66-3,34 parts by weight of epoxy Dianova resin ED-20 and 0,83-1,67 parts by weight of distillation waste of aniline with aniline content 15-18 parts by weight of a mass ratio of 2:1, respectively, at the following ratio of components, parts by weight:

Ethylenepropylene rubber 100,0

Sulfur 2,0

Zinc oxide 5,0

Stearic acid 1,0

Carbon 70,0-100,0

Tetramethylthiuramdisulphide 1,0-1,5

Mercaptobenzthiazole 0,5-1,0

Modifier 2,5-5,0



 

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FIELD: rubber industry; development of the receipts of the rubber mixtures.

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2 tbl

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14 cl, 2 tbl

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14 cl, 5 tbl

FIELD: polymer materials.

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3 cl, 2 tbl, 4 ex

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4 cl, 2 tbl, 10 ex

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6 cl, 2 tbl, 8 ex

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6 cl, tbl, 6 ex

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EFFECT: enhanced resistance to burning and frost.

4 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: rubber industry; development of the receipts of the rubber mixtures.

SUBSTANCE: the invention is pertaining to the field of the rubber industry, in particular, to the development of the receipts of the rubber mixtures on the basis of the ethylenepropylenediene caoutchouck with the heightened adhesion strength, which may find application at manufacture of the composite materials. The rubber mixture on the basis of 100 mass shares of the ethylenepropylenediene caoutchouck includes (in mass shares): sulfure -2, captax - 0.5, a thiuram - 1.5, the stearic acid - 1, zinc oxide - 5, industrial carbon PM75 - 50, the modifying agent of adhesion - the basic salt of calcium methyphosphite of the formula: . The technical result of the invention consists in the increased strength of adhesion of the rubber to the metal.

EFFECT: the invention ensures the increased strength of adhesion of the rubber to the metal.

2 tbl

FIELD: rubber industry; other industries; production of the rubber mixture on the basis of the non-saturated carbon-chain caoutchouck.

SUBSTANCE: the invention is pertaining to rubber industry and may be used for manufacture of industrial rubber goods in other industries. The rubber mixture contains(in mass shares): the non-saturated carbon-chain caoutchouck - the natural or butadienemethylstyrene - 100, thea vulcanizing group - sulfur and thiuram or sulfur, captax and diphenylguanidine - 2.4-4.0, the filler - industrial carbon or the chalk - 40-50, zinc oxide - 5-30, industrial stearine - 1.0-1.5, the stabilizing agent of oxidization and the retarder of the premature vulcanization - imid 2-sulfo benzoic acid - 0.5-2.0. The technical result of the invention consists in the increased stability of the rubber mixture vulcanizates against oxidization, including the light vulcanizates.

EFFECT: the invention ensures the increased stability of the rubber mixture vulcanizates against oxidization, including the light vulcanizates.

3 tbl, 2 ex

FIELD: petrochemical industry; rubber industry; other industries; methods of production of the rubber compound on the basis of the chloroprene rubber.

SUBSTANCE: the invention is pertaining to the field of rubber industry, in particular, to the method of production of the rubber compound on the basis of the chloroprene rubber, which is characterized by the heightened adhesiveness metrics. Production of the rubber compound on the basis of the chloroprene rubber includes mixing of magnesium oxide, zinc oxide, the stearic acid and carbon. At that during the mixing process additionally introduce the modifying agent, which has been preliminary produced as a result of interaction of the epoxy dianresin -ED-20 with the vat wastes of the residue of phenylamine production in the mass ratio of 2:1 at 150°С within 5 hours. At that the vat waste contain 15-18 mass share of phenylamine. The vulcanizates of the rubber compound based on the chloroprene rubber are characterized by the improved physical-mechanical metrics and the heightened adhesion to the metal. The method allows to salvage of the phenylamine (other name aniline) - the waste of the petrochemical industry.

EFFECT: the invention ensures production of the rubber compound based on the chloroprene rubber characterized by the improved physical-mechanical metrics and the heightened adhesion to the metal.

4 tbl

FIELD: rubber industry, in particular polymer composition.

SUBSTANCE: claimed composition contains (mass %): rubber 100; sulfur vulcanizating agent 2.5-3.5; promoter group 0.8-2.0; vulcanization activator 10-20; filler such as carbon black 50-70; plasticizer 2-3; anti-aging agent 3-6; ethylene/vinyl acetate copolymer containing 26-30 % of vinyl acetate 3-5.

EFFECT: copolymer with increased tear resistance.

2 tbl

FIELD: polymer production.

SUBSTANCE: invention relates to production of modified polymers and α-olefin copolymers and to developing complex disperse modifier of linear polymer chains through crosslinking with siloxane linkages. Dry dispersed polymer modifier for obtaining crosslinked polymers and α-olefin copolymers is composed of crosslinking agent (A): unsaturated hydrolysable organosilane; free-radical initiator (B): organic peroxide; moisture absorber (C): ethoxy- and/or acetoxysilane; hydrolysis/condensation catalyst (D): organic salts of tin, organic derivatives of sulfonic and disulfonic acids; stabilizer/antioxidant (E): organic derivative of tert-butylphenol or phenyl phosphite; inorganic finely dispersed filler/absorbent (F): oxide or silicate of metal selected from calcium, magnesium, aluminum, silicon, and titanium, or mixture thereof; optionally binder (G): polyolefin or α-olefin copolymer at following weight ratio: A:B:C:D:E:F:G -(50-65):(3.0-5.0):(5.0-8.0):(1.0-2.5):(6.8-8.0):(15-30):(0-16).

EFFECT: simplified technology of vulcanized polymers production of, reduced cost of produce having rather high physicochemical properties, thermal and chemical stability, and improved appearance of articles.

2 tbl

FIELD: rubber industry; production of the vulcanizable rubber mixture on the basis of the hydrogenated butadiene-nitrile caoutchouck.

SUBSTANCE: the invention is pertaining to production of the vulcanizable rubber mixture on the basis of the hydrogenated butadiene-nitrile caoutchouck used for manufacture of rubber-technical products efficient at the temperatures up to 150°С. The vulcanizable rubber mixture contains (in mass): the hydrogenated butadiene-nitrile caoutchouck - 70-95, the acrylate caoutchouck - 30-50, sulfur - 0.5-1.2, quaternary ammonium base - 2-6, sulfonamide Ц - 0.5-1.5, thiuram Д - 1-2, metallic stearate - 2-4, zinc oxide - 3-5, industrial carbon - 40-50, the stearic acid - 1-2, the antioxidant - 3.0-3.8. The technical result of the invention consists in reduction of the mixture viscosity, increase of the heat-resistance and the aggressive mediums-resistant properties with the simultaneous decrease of the residual compressive deformation.

EFFECT: the invention ensures the reduced mixture viscosity, the increased heat-resistant and the aggressive mediums-resistant properties at the simultaneously decreased of the residual compressive deformation.

3 cl, 2 tbl

FIELD: rubber industry; production of additives for the elastomers.

SUBSTANCE: the invention is pertaining to the additives for the elastomers, in particular, to the antiagers and may be used in rubber industry. The antiager for rubbers represents the product of interaction of 100.0 mass shares of the epoxy dian resins - ED-20 and 50.0 mass shares of the residual wastes of the phenylamine production with the contents of phenylamine of 15-18 mass shares at the temperature of 150°С within 5 hours. The technical result of the invention is extension of the range of the antiagers, improvement of the physical-mechanical indices of the vulcanizates on the basis of the various caoutchoucks due to introduction of the given antiager and the possibility of utilization of the residual wastes of the phenylamine production at production of this antiager.

EFFECT: the invention ensures extension of the range of the antiagers, the improved physical-mechanical indices of the vulcanizates on the basis of the various caoutchoucks due to introduction of the given antiager, the possibility of utilization of the residual wastes of the phenylamine production at production of this antiager.

3 tbl

Polymer composition // 2303045

FIELD: polymer materials.

SUBSTANCE: invention relates to make-ups of fine-grain polymer compositions and can be advantageously utilized in units subjected to considerable operation impacts and temperature variations, in particular for restoration of airdrome and road cement-concrete pavements and for protection of steel structures against corrosion. Polymer composition according to invention comprises 13.3% of oxidized butadiene-piperylene copolymer with dynamic viscosity 70-140 Ps (25°С, Hoppler viscosimeter) with butadiene-to-piperylene units weight ratio 58-42; 4.6% of epoxide resin "ED-20"; 1.5% of polyisocyanate; 66% of quartz sand; 0.7% of Laprol (modifying additive); and 13.9% of wollastonite "Woksil-100" (micro-reinforcing filler).

EFFECT: improved physico-mechanical characteristics of protective layers and increased adhesion of composition to steel.

2 tbl

FIELD: polymer materials.

SUBSTANCE: invention relates to air bladders such as inner tire cover or pneumatic tire tube including composition based on halogenated terpolymer constituted by units derived from C4-C8-isoolefins, units derived from C4-C14-multiolefins, and units derived from p-alkylstyrene. Compositions based on halogenated terpolymer are characterized by low air permeability, good adhesion to tire body, and acceptable longevity, which all allows their use in manufacture of air bladder.

EFFECT: improved performance characteristics of air bladders.

11 cl, 1 dwg, 8 tbl

FIELD: rubber industry; production of molded and non-molded mechanical rubber goods, delivery hoses in particular.

SUBSTANCE: rubber mix is prepared through co-vulcanization of triple combination of elastomers: butadiene-styrene, ethylene propylene diene, butadiene nitrile or polyisoprene in three different versions. Rubber mix contains sulfur, vulcanization accelerator, zinc white, dispersing agent, antiscorching agent, resin, plasticizing agent or softener, commercial furnace carbon. Rubber mix may also contain mineral filler, bitumen, plastics, antioxidant and/or moisture absorbing agent.

EFFECT: improved strength characteristics; enhanced economical efficiency, reliability and durability.

4 cl, 2 tbl, 10 ex

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

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