CN114559573A - Processing method of self-repairing sealing rubber material for tire - Google Patents
Processing method of self-repairing sealing rubber material for tire Download PDFInfo
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- CN114559573A CN114559573A CN202210136010.2A CN202210136010A CN114559573A CN 114559573 A CN114559573 A CN 114559573A CN 202210136010 A CN202210136010 A CN 202210136010A CN 114559573 A CN114559573 A CN 114559573A
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- 239000000463 material Substances 0.000 title claims abstract description 17
- 229920001971 elastomer Polymers 0.000 title claims abstract description 15
- 238000007789 sealing Methods 0.000 title claims abstract description 15
- 239000005060 rubber Substances 0.000 title claims abstract description 11
- 238000003672 processing method Methods 0.000 title claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 95
- 239000007788 liquid Substances 0.000 claims abstract description 43
- 238000002156 mixing Methods 0.000 claims abstract description 41
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims abstract description 38
- -1 olefin compound Chemical class 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 19
- 150000001875 compounds Chemical class 0.000 claims abstract description 16
- 239000002245 particle Substances 0.000 claims abstract description 12
- 229920005989 resin Polymers 0.000 claims description 14
- 239000011347 resin Substances 0.000 claims description 14
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 12
- 150000001336 alkenes Chemical class 0.000 claims description 10
- 229920005549 butyl rubber Polymers 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 229920006271 aliphatic hydrocarbon resin Polymers 0.000 claims description 6
- 239000006229 carbon black Substances 0.000 claims description 6
- 150000002978 peroxides Chemical class 0.000 claims description 6
- 239000011787 zinc oxide Substances 0.000 claims description 6
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- 229920002367 Polyisobutene Polymers 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 229920006272 aromatic hydrocarbon resin Polymers 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 239000000806 elastomer Substances 0.000 claims description 4
- 229920005555 halobutyl Polymers 0.000 claims description 4
- 239000011256 inorganic filler Substances 0.000 claims description 4
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 4
- 239000012763 reinforcing filler Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- SYXTYIFRUXOUQP-UHFFFAOYSA-N (2-methylpropan-2-yl)oxy butaneperoxoate Chemical compound CCCC(=O)OOOC(C)(C)C SYXTYIFRUXOUQP-UHFFFAOYSA-N 0.000 claims description 2
- MYOQALXKVOJACM-UHFFFAOYSA-N (2-methylpropan-2-yl)oxy pentaneperoxoate Chemical compound CCCCC(=O)OOOC(C)(C)C MYOQALXKVOJACM-UHFFFAOYSA-N 0.000 claims description 2
- HSLFISVKRDQEBY-UHFFFAOYSA-N 1,1-bis(tert-butylperoxy)cyclohexane Chemical compound CC(C)(C)OOC1(OOC(C)(C)C)CCCCC1 HSLFISVKRDQEBY-UHFFFAOYSA-N 0.000 claims description 2
- KPAPHODVWOVUJL-UHFFFAOYSA-N 1-benzofuran;1h-indene Chemical compound C1=CC=C2CC=CC2=C1.C1=CC=C2OC=CC2=C1 KPAPHODVWOVUJL-UHFFFAOYSA-N 0.000 claims description 2
- WVGXBYVKFQJQGN-UHFFFAOYSA-N 1-tert-butylperoxy-2-propan-2-ylbenzene Chemical compound CC(C)C1=CC=CC=C1OOC(C)(C)C WVGXBYVKFQJQGN-UHFFFAOYSA-N 0.000 claims description 2
- DMWVYCCGCQPJEA-UHFFFAOYSA-N 2,5-bis(tert-butylperoxy)-2,5-dimethylhexane Chemical compound CC(C)(C)OOC(C)(C)CCC(C)(C)OOC(C)(C)C DMWVYCCGCQPJEA-UHFFFAOYSA-N 0.000 claims description 2
- KRDXTHSSNCTAGY-UHFFFAOYSA-N 2-cyclohexylpyrrolidine Chemical compound C1CCNC1C1CCCCC1 KRDXTHSSNCTAGY-UHFFFAOYSA-N 0.000 claims description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 2
- 239000005995 Aluminium silicate Substances 0.000 claims description 2
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 2
- HECLRDQVFMWTQS-UHFFFAOYSA-N Dicyclopentadiene Chemical compound C1C2C3CC=CC3C1C=C2 HECLRDQVFMWTQS-UHFFFAOYSA-N 0.000 claims description 2
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical group CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 claims description 2
- 239000006057 Non-nutritive feed additive Substances 0.000 claims description 2
- 239000005062 Polybutadiene Substances 0.000 claims description 2
- 239000004793 Polystyrene Substances 0.000 claims description 2
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 238000007792 addition Methods 0.000 claims description 2
- 235000012211 aluminium silicate Nutrition 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 claims description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 2
- 229910052740 iodine Inorganic materials 0.000 claims description 2
- 239000011630 iodine Substances 0.000 claims description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000010445 mica Substances 0.000 claims description 2
- 229910052618 mica group Inorganic materials 0.000 claims description 2
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 2
- 150000001451 organic peroxides Chemical class 0.000 claims description 2
- 229920001568 phenolic resin Polymers 0.000 claims description 2
- 239000005011 phenolic resin Substances 0.000 claims description 2
- 229920002857 polybutadiene Polymers 0.000 claims description 2
- 229920001195 polyisoprene Polymers 0.000 claims description 2
- 229920002223 polystyrene Polymers 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 229920006395 saturated elastomer Polymers 0.000 claims description 2
- 238000001179 sorption measurement Methods 0.000 claims description 2
- 150000003505 terpenes Chemical class 0.000 claims description 2
- 235000007586 terpenes Nutrition 0.000 claims description 2
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 2
- 229920006285 olefinic elastomer Polymers 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000565 sealant Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 5
- 238000010057 rubber processing Methods 0.000 description 2
- 229940126214 compound 3 Drugs 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/002—Methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
- B29D30/0685—Incorporating auto-repairing or self-sealing arrangements or agents on or into tyres
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J109/00—Adhesives based on homopolymers or copolymers of conjugated diene hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
- C09J123/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
- C09J123/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
- C09J123/22—Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefines
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/26—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers modified by chemical after-treatment
- C09J123/28—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers modified by chemical after-treatment by reaction with halogens or compounds containing halogen
- C09J123/283—Halogenated homo- or copolymers of iso-olefines
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J125/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Adhesives based on derivatives of such polymers
- C09J125/02—Homopolymers or copolymers of hydrocarbons
- C09J125/04—Homopolymers or copolymers of styrene
- C09J125/06—Polystyrene
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention relates to the field of tire manufacturing, in particular to a processing method of a self-repairing sealing rubber material for a tire. A method for processing a self-repairing sealing compound for a tire, the method comprising the steps of: 1) mixing all materials except the liquid olefin compound in an internal mixer to obtain a mixture P, wherein the mixing time is 2-90 minutes, and the mixing temperature is 100-160 ℃; 2) mixing the mixture P and the liquid olefin compound in a single-screw extruder or a double-screw extruder, wherein the ratio of the mixture P to the liquid olefin compound in the mixture M is 5: 1-1: 4; the mixing temperature is 40-150 ℃, and the mixture M for self-repairing and sealing of the tire is obtained. The tire self-repairing sealant processed by the method is simple and convenient, the mixture and the liquid olefin compound are uniformly mixed, and no mixture particles exist.
Description
Technical Field
The invention relates to the field of tire manufacturing, in particular to a processing method of a self-repairing sealing rubber material for a tire.
Background
Nowadays, people pay more and more attention to environmental protection, and the requirement on gas emission is higher and higher, especially the exhaust emission of automobiles. When automobile manufacturers produce new energy vehicles and gasoline vehicles, the weight of the automobile bodies is reduced to reduce the emission of automobile exhaust; meanwhile, the internal space of the automobile is optimized, the comfort of the automobile is improved, and an automobile spare tire is omitted.
Pneumatic tires for automobiles are run with air leakage caused by foreign objects penetrating the tire, which may cause instability in running conditions of the automobile, requiring immediate replacement of the tire or temporary repair of the tire. In order to ensure that the vehicle is in a driving condition, it is not necessary to stop and leave the vehicle for tire replacement or repair.
In order to achieve the above object, tires having run-flat performance have been developed on the market, which can temporarily continue running by lowering the tread onto the underlying support ring in the event of a tire pressure loss. In addition, there are run-flat tires having reinforced tire sidewalls that can withstand axle loads for a limited time without falling into unsafe driving conditions even in the absence of air pressure in the event of a loss of tire pressure. All these designs present on the market add significantly to the weight and rolling resistance of the tyre and therefore to the fuel consumption in the running of the motor vehicle.
The Chinese invention patent application (application number: 2021111706634) applied by the applicant discloses a self-repairing tire sealant, a preparation method thereof and a self-repairing tire, but the mixture for the self-repairing tire is difficult to process, and the rubber processing cannot be completed by using the traditional rubber processing equipment.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a method for processing a tire self-repairing sealing rubber material.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for processing a self-repairing sealing compound for a tire, the method comprising the steps of:
1) mixing all materials except the liquid olefin compound in an internal mixer to obtain a mixture P, wherein the mixing time is 2-90 minutes, and the mixing temperature is 100-160 ℃;
2) mixing the mixture P and the liquid olefin compound in a single-screw extruder or a double-screw extruder, wherein the ratio of the mixture P to the liquid olefin compound in the mixture M is 5: 1-1: 4; the mixing temperature is 40-150 ℃, and the mixture M for self-repairing and sealing of the tire is obtained.
As a further improvement, the mixture P comprises: olefin rubber: 100 parts of (A); 3-90 parts of reinforcing filler, wherein the reinforcing filler contains 3-90 parts of carbon black and 0-30 parts of inorganic filler; 0-50 parts of resin; 3-30 parts of a liquid or solid processing aid; 2-20 parts of a vulcanizing agent.
As a further improvement, the olefin rubber is butyl rubber with the saturation degree of less than 3.0%, the butyl rubber is one or two mixtures or three mixtures of butyl rubber, halogenated butyl rubber and special elastomer butyl rubber, preferably the mixture of the two mixtures, and the mixture of the halogenated butyl rubber and the special elastomer;
the liquid olefin compound is a saturated olefin liquid compound or an unsaturated olefin liquid compound, or a mixture of the two, such as polyisoprene, isobutylene, polyisobutylene, polybutadiene, polystyrene, preferably polyisobutylene; the molecular weight of the liquid olefin compound is 400-5000 g/mol;
the particle size of the carbon black is 25-300 nm, the iodine absorption value is 20-120 mg/g, the CTAB adsorption specific surface area is 20-120 m2/g, and the DBP absorption value is 60-200 ml/100 g;
the inorganic filler comprises one or a mixture of calcium carbonate, kaolin, pottery, mica powder and white carbon black;
the resin comprises one or two mixtures of C5 resin, C9 resin, C5/C9 resin, rosin resin, terpene resin, DCPD resin, phenolic resin and coumarone-indene resin, preferably C5 resin; the Tg point of the related resin is-40 to 70 ℃, and the molecular weight is 400 to 2000 g/mol;
the vulcanizing agent comprises peroxide, zinc oxide, one or a mixture of two of the peroxide and the zinc oxide, preferably a mixture of the peroxide and the zinc oxide. The organic peroxide comprises one or a mixture of two or a mixture of three of dicumyl peroxide, tert-butyl cumyl peroxide, ethyl 3, 3-bis (tert-butylperoxy) butyrate, n-butyl 4, 4-bis (tert-butylperoxy) valerate, di-tert-butyl peroxide, 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane, 1, 4-bis (tert-butylperoxy isopropyl benzene), 1, 1-bis (tert-butylperoxy) cyclohexane and 1, 1-di-tert-butylperoxy-3, 3, 5-trimethylcyclohexane; dicumyl peroxide is preferred.
As a further improvement, the mixture P is obtained by using an internal mixer by adopting one-stage mixing or two-stage mixing:
first-stage mixing: all the materials in the mixture P are added at one stage, and the mixing temperature is 100-140 ℃, preferably 95-135 ℃, and more preferably 90-125 ℃; tabletting and storing the mixed mixture P by using an open mill or an extruder;
and (3) second-stage mixing: a) mixing all the materials except the vulcanizing agent at the mixing temperature of 100-160 ℃, preferably 95-150 ℃, more preferably 90-135 ℃ to obtain a mixture A, and tabletting and cooling the mixture A by using an open mill or an extruder; b) mixing the mixture A and the vulcanizing agent by using an open mill or an internal mixer, wherein the mixing temperature is 80-130 ℃, preferably 85-125 ℃, and more preferably 85-120 ℃, and tabletting and cooling the mixture P by using the open mill or the extruder.
As a further improvement, the mixture P and the liquid olefin compound are mixed by using a twin-screw extruder, and the ratio of the mixture P to the liquid olefin compound is preferably 3:1 to 1:3, more preferably 2:1 to 1: 2.5.
As a further improvement, the liquid olefinic compound is added in one or more portions of the extruder, preferably in multiple portions, and the number of additions may be one, two, three, four, five, preferably three or four.
As a further improvement, the temperature of the liquid olefin compound is 40-100 ℃; the temperature of the extruder is controlled in multiple stages, wherein the temperature of the first stage is set to be between room temperature and 60 ℃, the temperature of the second stage is set to be between 40 and 90 ℃, the temperature of the third stage is set to be between 40 and 90 ℃, the temperature of the fourth stage is set to be between 50 and 90 ℃, the temperature of the fifth stage is set to be between 40 and 90 ℃, and the temperature of the sixth stage is set to be between 40 and 110 ℃.
As a further improvement, the length to diameter ratio of the screw is not more than 70:1, preferably not more than 60: 1; the screw has a diameter of 25mm to 135mm, preferably 30mm to 125mm, more preferably 35mm to 110 mm; the two screws of the twin-screw extruder are rotated in the same direction or in different directions, preferably in the same direction.
Further, the invention also discloses the tire self-repairing sealing rubber material prepared by the processing method.
Further, the invention also discloses a self-repairing tire, and the inner surface of the self-repairing tire is coated with the tire self-repairing sealing rubber material.
By adopting the technical scheme, the method is simple and convenient, the mixture and the liquid olefin compound are uniformly mixed, and no mixture particles exist.
Drawings
FIG. 1: an apparatus flow diagram of the method of the present invention.
Detailed Description
The technical solutions in the embodiments are clearly and completely described below in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of the present invention.
Comparative examples 1 to 3 of the present invention all used the conventional two-stage mixing method:
the mixture P was mixed in a 1.5 liter laboratory internal mixer with a tangential rotor, all the materials were added in one portion, the mixing temperature was 110 ℃ and the mixing time was 10 minutes, and the mixed mixture P was sheeted in an open mill and cooled for storage.
The mixture M was mixed in a 1.5 liter laboratory internal mixer with a tangential rotor, the mixture P and the liquid olefin compound were added in two stages at a mixing temperature of 100 ℃ for 10 minutes.
Examples 1-2 the mixing method of the present invention was used, specifically as follows:
the mixture P was mixed using an internal mixer using rotors of the tangential type and having a capacity of 270L. All the materials in the mixture P are added at one stage, the mixing temperature is 110 ℃, and the mixing time is 10 minutes. The mixed mixture P is tabletted by an extruder and stored in a cooled state.
As shown in FIG. 1, the mixture M (mixture P and liquid olefin compound) was mixed by a co-rotating twin-screw extruder, the liquid olefin compound was added in two, three and four stages in three stages, respectively, and the liquid olefin compound was added in a ratio of 1/3 in each stage. The temperature of the liquid olefinic compound was 40 ℃. The length-diameter ratio of the screw is 50:1, and the rotating speed of the double-screw extruder is 250 rpm. Temperature setting of each section of the twin-screw extruder: the first section is 40 ℃, the second section is 50 ℃, the third section is 50 ℃, the fourth section is 60 ℃, the fifth section is 50 ℃ and the sixth section is 70 ℃.
Comparative examples and examples are shown in the following Table (I)
Watch 1
In comparative example 1, no liquid olefin compound was added, and mixture M (mixture P) was mixed uniformly without sticking to the internal mixer, without particles, and the mill had smooth surfaces.
Comparative example 2, mixture P was mixed well, without sticking to the internal mixer, without particles, smooth on the mill platens surface; the mixture M (mixture P and liquid olefin compound in a ratio of 5:1) was mixed using an internal mixer, and the mixture P and liquid olefin compound were uniformly mixed, but the mixture M adhered to the side wall, rotor, and upper ram of the internal mixer.
Comparative example 3, mixture P was mixed uniformly, without sticking to the internal mixer, without particles, smooth on the mill platen surface; the mixture M (the ratio of the mixture P to the liquid olefin-based compound is 3:1) was mixed by an internal mixer, the mixture M adhered to the side wall, the rotor, the upper plug of the internal mixer and having a large number of particles of the mixture P, the mixture P and the liquid olefin-based compound were not uniformly mixed, and the mixture P in a solid state was in a two-phase separated state from the liquid olefin-based compound.
For example 1, the mixture P was mixed uniformly without sticking to the internal mixer and without particles, and the mill had smooth surfaces; the mixture M (ratio of mixture P to liquid olefinic compound 3:1) was mixed using a twin-screw extruder, and the mixture P was uniformly mixed with the liquid olefinic compound without the presence of particles of the mixture P.
For example 2, the mixture P was mixed uniformly without sticking to the internal mixer and without particles, and the mill had smooth surfaces; mixing mixture M (mixture P and liquid olefin compound ratio is 1:1.5) with a twin-screw extruder, mixing mixture P and liquid olefin compound
The mixture is mixed homogeneously, without particles of mixture P being present.
Claims (10)
1. A processing method of a self-repairing sealing rubber material for a tire is characterized by comprising the following steps:
1) mixing all materials except the liquid olefin compound in an internal mixer to obtain a mixture P, wherein the mixing time is 2-90 minutes, and the mixing temperature is 100-160 ℃;
2) mixing the mixture P and the liquid olefin compound in a single-screw extruder or a double-screw extruder, wherein the ratio of the mixture P to the liquid olefin compound in the mixture M is 5: 1-1: 4; the mixing temperature is 40-150 ℃, and the mixture M for self-repairing and sealing of the tire is obtained.
2. The process according to claim 1, characterized in that the mixture P comprises: olefin rubber: 100 parts of (A); 3-90 parts of reinforcing filler, wherein the reinforcing filler contains 3-90 parts of carbon black and 0-30 parts of inorganic filler; 0-50 parts of resin; 3-30 parts of a liquid or solid processing aid; 2-20 parts of a vulcanizing agent.
3. The process according to claim 2, wherein the olefinic rubber is a butyl rubber having a degree of saturation of less than 3.0%, the butyl rubber being selected from the group consisting of butyl rubber, halogenated butyl rubber, butyl rubber of a specialty elastomer, mixtures of two or more, preferably mixtures of two or more, mixtures of halogenated butyl rubber and specialty elastomer;
the liquid olefin compound is a saturated olefin liquid compound or an unsaturated olefin liquid compound, or a mixture of the two, such as polyisoprene, isobutylene, polyisobutylene, polybutadiene, polystyrene, preferably polyisobutylene; the molecular weight of the liquid olefin compound is 400-5000 g/mol;
the particle size of the carbon black is 25-300 nm, the iodine absorption value is 20-120 mg/g, the CTAB adsorption specific surface area is 20-120 m2/g, and the DBP absorption value is 60-200 ml/100 g;
the inorganic filler comprises one or a mixture of calcium carbonate, kaolin, pottery, mica powder and white carbon black;
the resin comprises one or two mixtures of C5 resin, C9 resin, C5/C9 resin, rosin resin, terpene resin, DCPD resin, phenolic resin and coumarone-indene resin, preferably C5 resin; the Tg point of the related resin is-40-70 ℃, and the molecular weight is 400-2000 g/mol;
the vulcanizing agent comprises peroxide, zinc oxide, one or a mixture of two of the peroxide and the zinc oxide, preferably a mixture of the peroxide and the zinc oxide;
the organic peroxide comprises one or a mixture of two or a mixture of three of dicumyl peroxide, tert-butyl cumyl peroxide, ethyl 3, 3-bis (tert-butylperoxy) butyrate, n-butyl 4, 4-bis (tert-butylperoxy) valerate, di-tert-butyl peroxide, 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane, 1, 4-bis (tert-butylperoxy isopropyl benzene), 1, 1-bis (tert-butylperoxy) cyclohexane and 1, 1-di-tert-butylperoxy-3, 3, 5-trimethylcyclohexane; dicumyl peroxide is preferred.
4. The process according to claim 1, wherein the mixture P is obtained by mixing in a first stage or in a second stage using an internal mixer:
first-stage mixing: all materials in the mixture P are added at one stage, and the mixing temperature is 100-140 ℃, preferably 95-135 ℃, and more preferably 90-125 ℃; tabletting and storing the mixed mixture P by using an open mill or an extruder;
and (3) second-stage mixing: a) mixing all the materials except the vulcanizing agent at the mixing temperature of 100-160 ℃, preferably 95-150 ℃, more preferably 90-135 ℃ to obtain a mixture A, and tabletting and cooling the mixture A by using an open mill or an extruder; b) mixing the mixture A and a vulcanizing agent by using an open mill or an internal mixer at the mixing temperature of 80-130 ℃, preferably 85-125 ℃, more preferably 85-120 ℃, and tabletting and cooling the mixture P by using an open mill or an extruder.
5. The process according to claim 1, wherein the mixture P and the liquid olefin compound are mixed by a twin-screw extruder, preferably in a ratio of 3:1 to 1:3, more preferably 2:1 to 1: 2.5.
6. The process according to any of claims 1 to 5, wherein the liquid olefinic compound is added in one or more portions, preferably in multiple portions, of the extruder, wherein the number of additions may be one, two, three, four, five, preferably three or four.
7. The process according to claim 6, wherein the liquid olefinic compound has a temperature of 40 ℃ to 100 ℃; the temperature of the extruder is controlled in multiple stages, wherein the temperature of the first stage is set to be between room temperature and 60 ℃, the temperature of the second stage is set to be between 40 and 90 ℃, the temperature of the third stage is set to be between 40 and 90 ℃, the temperature of the fourth stage is set to be between 50 and 90 ℃, the temperature of the fifth stage is set to be between 40 and 90 ℃, and the temperature of the sixth stage is set to be between 40 and 110 ℃.
8. The process of any one of claims 1 to 5, wherein the screw has a length to diameter ratio of not more than 70:1, preferably not more than 60: 1; the screw has a diameter of 25mm to 135mm, preferably 30mm to 125mm, more preferably 35mm to 110 mm; the two screws of the twin-screw extruder are rotated in the same direction or in different directions, preferably in the same direction.
9. A self-healing tire sealing compound prepared by the process of any one of claims 1 to 8.
10. A self-healing tire, characterized in that the inner surface of the self-healing tire is coated with the tire self-healing sealing compound according to claim 9.
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| CN102822245A (en) * | 2010-01-28 | 2012-12-12 | 米其林企业总公司 | Method of manufacturing a self-sealing composition |
| US20130172474A1 (en) * | 2010-01-28 | 2013-07-04 | Michelin Recherche Et Technique S.A. | Method for Manufacturing an Elastomeric Composition Having a Self-Sealing Property |
| US20130202829A1 (en) * | 2010-01-28 | 2013-08-08 | Michelin Recherche Et Technique S.A. | Elastomer Composition for a Tire Object having a Self-Sealing Property |
| CN103980621A (en) * | 2014-05-23 | 2014-08-13 | 苏州特威塑胶有限公司 | High-performance dynamic vulcanization thermoplastic elastomer and preparation method thereof |
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| CN111808377A (en) * | 2020-07-22 | 2020-10-23 | 四川远星橡胶有限责任公司 | Self-repairing tire inner liner rubber material and preparation method thereof |
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|---|---|---|---|---|
| CN102822245A (en) * | 2010-01-28 | 2012-12-12 | 米其林企业总公司 | Method of manufacturing a self-sealing composition |
| US20130172474A1 (en) * | 2010-01-28 | 2013-07-04 | Michelin Recherche Et Technique S.A. | Method for Manufacturing an Elastomeric Composition Having a Self-Sealing Property |
| US20130202829A1 (en) * | 2010-01-28 | 2013-08-08 | Michelin Recherche Et Technique S.A. | Elastomer Composition for a Tire Object having a Self-Sealing Property |
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