CN113429641A - Nylon bead wrapping rubber for all-steel truck tire and preparation method thereof - Google Patents
Nylon bead wrapping rubber for all-steel truck tire and preparation method thereof Download PDFInfo
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- CN113429641A CN113429641A CN202110794323.2A CN202110794323A CN113429641A CN 113429641 A CN113429641 A CN 113429641A CN 202110794323 A CN202110794323 A CN 202110794323A CN 113429641 A CN113429641 A CN 113429641A
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 112
- 239000005060 rubber Substances 0.000 title claims abstract description 112
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 44
- 239000011324 bead Substances 0.000 title claims abstract description 44
- 239000010959 steel Substances 0.000 title claims abstract description 44
- 239000004677 Nylon Substances 0.000 title claims abstract description 43
- 229920001778 nylon Polymers 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000006229 carbon black Substances 0.000 claims abstract description 53
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 38
- 239000011347 resin Substances 0.000 claims abstract description 34
- 229920005989 resin Polymers 0.000 claims abstract description 34
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000002041 carbon nanotube Substances 0.000 claims abstract description 33
- 229910021393 carbon nanotube Inorganic materials 0.000 claims abstract description 33
- 241000208688 Eucommia Species 0.000 claims abstract description 26
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000000853 adhesive Substances 0.000 claims abstract description 25
- 230000001070 adhesive effect Effects 0.000 claims abstract description 25
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 25
- 239000003607 modifier Substances 0.000 claims abstract description 23
- 239000011248 coating agent Substances 0.000 claims abstract description 22
- 238000000576 coating method Methods 0.000 claims abstract description 22
- 239000005062 Polybutadiene Substances 0.000 claims abstract description 19
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229920002857 polybutadiene Polymers 0.000 claims abstract description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 15
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 13
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 13
- KVBYPTUGEKVEIJ-UHFFFAOYSA-N benzene-1,3-diol;formaldehyde Chemical compound O=C.OC1=CC=CC(O)=C1 KVBYPTUGEKVEIJ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229920003052 natural elastomer Polymers 0.000 claims abstract description 13
- 229920001194 natural rubber Polymers 0.000 claims abstract description 13
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 13
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000008117 stearic acid Substances 0.000 claims abstract description 13
- 239000011787 zinc oxide Substances 0.000 claims abstract description 13
- 238000011049 filling Methods 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims description 49
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 17
- 239000010692 aromatic oil Substances 0.000 claims description 12
- 229910052717 sulfur Inorganic materials 0.000 claims description 11
- 239000011593 sulfur Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 239000004744 fabric Substances 0.000 claims description 8
- 239000003921 oil Substances 0.000 claims description 8
- 125000004432 carbon atom Chemical group C* 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 238000010074 rubber mixing Methods 0.000 claims description 5
- 125000002029 aromatic hydrocarbon group Chemical group 0.000 claims description 4
- 239000000945 filler Substances 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 4
- 150000001335 aliphatic alkanes Chemical group 0.000 claims description 2
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- 239000011230 binding agent Substances 0.000 claims description 2
- 238000001556 precipitation Methods 0.000 claims description 2
- 230000020169 heat generation Effects 0.000 abstract description 7
- DEQZTKGFXNUBJL-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)cyclohexanamine Chemical compound C1CCCCC1NSC1=NC2=CC=CC=C2S1 DEQZTKGFXNUBJL-UHFFFAOYSA-N 0.000 abstract description 6
- 230000002195 synergetic effect Effects 0.000 description 9
- 241000208689 Eucommia ulmoides Species 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000004939 coking Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920000620 organic polymer Polymers 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention belongs to the technical field of rubber, and particularly relates to nylon bead wrapping rubber for an all-steel truck tire and a preparation method thereof. The nylon bead wrapping rubber for the all-steel truck tire comprises the following components in parts by weight: 70-90 parts of natural rubber, 1-20 parts of eucommia rubber, 5-20 parts of butadiene rubber, 40-55 parts of carbon black, 0.1-2 parts of carbon black modifier, 0.1-3 parts of carbon nano tube, 5-15 parts of white carbon black, 3-6 parts of zinc oxide, 1-3 parts of stearic acid, 0.5-3 parts of tackifying resin, 0.5-2 parts of resorcinol formaldehyde resin, 651-3 parts of adhesive, 1-3 parts of anti-aging agent, 5-10 parts of rubber filling oil, 0.5-2 parts of accelerator CZ, 2-5 parts of insoluble sulfur powder and 0.1-0.5 part of anti-scorching agent CTP. The nylon bead coating rubber for the all-steel truck tire has the advantages of better adhesive force, high dynamic modulus, low heat generation and excellent tear resistance, can effectively improve the bearing resistance and safety performance of the tire, and can further prolong the service life of the tire.
Description
Technical Field
The invention belongs to the technical field of rubber, and particularly relates to nylon bead wrapping rubber for an all-steel truck tire and a preparation method thereof.
Background
In the using process of the engineering vehicle, the all-steel truck tire is often used under severe conditions such as overload and poor driving road conditions, so that the problem that a seam allowance is empty or the seam allowance is cracked easily occurs at the steel wire seam allowance turn-up end point of the all-steel truck tire, and the problem has great hidden danger to the safety performance of the tire. Through the analysis and research on the tire symptoms, the problem is considered to have a great relationship with the performance of the nylon seam allowance wrapping rubber adhered in the tire. The turn-up end point position of the bead of the all-steel heavy-duty tire is a load stress and deflection concentration point, and the position of the tire is most likely to cause the problem that the bead is empty or cracked under severe use conditions.
Disclosure of Invention
The invention aims to overcome and supplement the defects in the prior art and provides nylon bead wrapping rubber for an all-steel truck tire and a preparation method thereof. According to the nylon bead wrapping rubber for the all-steel truck tire, rubber and filler can be mixed more uniformly through an OMS low-temperature mixing process, and the excellent performances of the carbon nano tube and the eucommia rubber can be fully exerted; the carbon nano tube and the carbon black modifier are added, and the adhesive force and the tear resistance of the coating rubber can be improved and the heat generation can be reduced under the synergistic effect of the carbon nano tube and the carbon black modifier; the dynamic modulus and the fatigue resistance of the coating rubber can be improved by the synergistic effect of the eucommia rubber and the carbon black modifier, and the damage resistance of the coating rubber is further improved; the carbon nano tube, the eucommia rubber and the carbon black modifier are used together, so that a certain synergistic enhancement effect is achieved, and the comprehensive performance of the coating rubber can be further improved; meanwhile, a new application direction is explored for the application of the carbon nano tube and the eucommia rubber in the tire.
In order to solve the defects of the prior art, the invention adopts the following technical scheme:
in a first aspect, the embodiment of the invention provides an all-steel truck tire nylon bead wrapping rubber which comprises the following components in parts by weight: 70-93 parts of natural rubber, 2-20 parts of eucommia rubber, 5-20 parts of butadiene rubber, 40-55 parts of carbon black, 0.1-2 parts of carbon black modifier, 0.1-3 parts of carbon nano tube, 5-15 parts of white carbon black, 3-6 parts of zinc oxide, 1-3 parts of stearic acid, 0.5-3 parts of tackifying resin, 0.5-2 parts of resorcinol formaldehyde resin, 651-3 parts of adhesive, 1-3 parts of anti-aging agent, 5-10 parts of rubber filling oil, 0.5-2 parts of promoter CZ, 2-5 parts of insoluble sulfur powder and 0.1-0.5 part of anti-scorching agent CTP.
Further, the eucommia ulmoides rubber is natural eucommia ulmoides rubber or synthetic eucommia ulmoides rubber; the cis-butadiene rubber is low cis-butadiene rubber or high cis-butadiene rubber.
Further, the carbon nano tube is a gas phase precipitation method multi-wall agglomeration type carbon nano tube, the tube diameter of the carbon nano tube is 10-15 nm, the length of the carbon nano tube is 3-10 mu m, and the specific surface area of the carbon nano tube is 250-290 m2/g。
Further, the white carbon black is HD165MP and/or HD175 MP; the carbon black is N330 or N326.
Further, the carbon black modifier specifically comprises at least one compound represented by the following formula (I):
wherein R1 and R2 respectively represent aromatic hydrocarbon groups with 6-30 carbon atoms, alkane groups with 6-30 carbon atoms, or alkyl aromatic hydrocarbon groups with 6-30 carbon atoms, or R1 is hydrogen, or R2 is hydrogen.
Further, the tackifying resin is one or two of C5 tackifying resin, 203 tackifying resin and 204 tackifying resin; the rubber filling oil is aromatic oil, environment-friendly aromatic oil or naphthenic oil.
Further, the anti-aging agent is two or three of an anti-aging agent 4020, an anti-aging agent RD and an anti-aging agent 3100.
Further, the insoluble sulfur IS insoluble sulfur OT-20 or insoluble sulfur IS 6033.
In a second aspect, the embodiment of the invention provides a preparation method of nylon bead cloth coating rubber for an all-steel truck tire, which adopts a one-step continuous low-temperature mixing process and comprises the following steps:
(1) mixing master batch by an internal mixer: putting 70-93 parts of natural rubber, 2-20 parts of eucommia rubber, 5-20 parts of butadiene rubber, 40-55 parts of carbon black, 0.1-2 parts of carbon black modifier, 0.1-3 parts of carbon nano tube, 5-15 parts of white carbon black, 3-6 parts of zinc oxide, 1-3 parts of stearic acid, 0.5-3 parts of tackifying resin, 0.5-2 parts of resorcinol formaldehyde resin, 1-3 parts of anti-aging agent and 5-10 parts of rubber filling oil into an internal mixer for mixing, wherein the top plug pressure is 6-18 MPa, the rotor speed is 40-50 r/min, the rubber discharge temperature is 140-155 ℃, and the time is 135-160 s, so as to obtain a master batch;
(2) mixing the final rubber mixing with an open mill: directly conveying the masterbatch obtained in the step (1) to an open mill for supplementary mixing and cooling, when the temperature of the masterbatch is less than or equal to 75 ℃, putting 1-3 parts of binder RA65, 0.5-2 parts of promoter CZ, 2-5 parts of insoluble sulfur powder and 0.1-0.5 part of antiscorching agent CTP into the open mill for mixing, controlling the roll distance of the open mill to be 2.5-4 mm, controlling the rotating speed of the open mill to be 20-40 r/min, controlling the rubber discharge temperature to be 85-100 ℃, controlling the mixing time of the open mill to be 600-800 s, and obtaining the nylon bead wrapping cloth rubber of the all-steel truck tire after mixing.
Further, the internal mixer in the step (1) is a GK320E internal mixer, and the open mill in the step (2) is a phi 660X 2130mm open mill.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
(1) according to the nylon bead cloth coating rubber for the all-steel truck tire, rubber and filler can be mixed more uniformly and fully to exert the respective excellent performances of the carbon nano tube and the eucommia rubber through an OMS (organic polymer technology) low-temperature mixing process; (2) the adhesive force and the tear resistance of the coating adhesive can be improved and the heat generation can be reduced under the synergistic effect of the carbon nanotube and the carbon black modifier; (3) the dynamic modulus and the fatigue resistance of the coating rubber can be improved by the synergistic effect of the eucommia rubber and the carbon black modifier, and the damage resistance of the coating rubber is further improved; (4) the carbon nano tube, the eucommia rubber and the carbon black modifier are used together, so that a certain synergistic enhancement effect is achieved, and the comprehensive performance of the coating rubber can be further improved; meanwhile, a new application direction is explored for the application of the carbon nano tube and the eucommia rubber in the tire.
The nylon bead wrapping adhesive disclosed by the invention has the advantages of better adhesive force, high dynamic modulus, low heat generation and excellent tear resistance, the damage resistance of the nylon bead wrapping adhesive can be effectively improved, the bearing resistance and the safety performance of a tire are further improved, and the service life of the tire is further prolonged.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The nylon bead wrapping rubber for the all-steel truck tire comprises the following components in parts by weight: 82 parts of natural rubber, 3 parts of synthetic eucommia rubber, 15 parts of high cis-butadiene rubber, 0.8 part of carbon black modifier DC-01, 1.5 parts of carbon nanotube GT-300, 48 parts of N330 carbon black, 10 parts of white carbon black HD175MP, 5 parts of zinc oxide, 2 parts of stearic acid, 1 part of C5 tackifying resin, 1 part of resorcinol formaldehyde resin, 8 parts of aromatic oil, 1.5 parts of anti-aging agent 4020, 0.5 part of anti-aging agent RD, 2 parts of adhesive RA65, 1.2 parts of accelerator CZ, 3.5 parts of insoluble sulfur OT-20 and 0.2 part of anti-scorching agent CTP.
A preparation method of nylon bead wrapping rubber for an all-steel truck tire adopts a one-step continuous low-temperature mixing (OMS low-temperature mixing) process, and comprises the following steps:
mixing master batch by an internal mixer: putting natural rubber, eucommia rubber, high cis-butadiene rubber, carbon nano tubes, N330 carbon black, white carbon black HD175MP, zinc oxide, stearic acid, C5 tackifying resin, resorcinol formaldehyde resin, aromatic oil and an anti-aging agent into an internal mixer for mixing, wherein the top plug pressure is 16MPa, the rotor rotation speed is 40r/min, the rubber discharge temperature is 145 ℃ and the time is 140s, so as to obtain a master batch;
mixing the final rubber mixing with an open mill: and (2) directly conveying the master batch obtained in the step (1) to an open mill for supplementary mixing and cooling, when the temperature of the rubber is less than or equal to 75 ℃, putting an adhesive RA65, an accelerant CZ, insoluble sulfur powder, a carbon black modifier and an anti-coking agent into the open mill for mixing, wherein the roll distance of the open mill is set to be 3.5mm, the rotating speed of the open mill is set to be 30r/min, the rubber discharge temperature is set to be 95 ℃, and the mixing time of the open mill is controlled to be 700 seconds, so that the nylon bead cloth coating rubber of the all-steel truck tire is obtained.
Example 2
The nylon bead wrapping rubber for the all-steel truck tire comprises the following components in parts by weight: 72 parts of natural rubber, 13 parts of synthetic eucommia rubber, 15 parts of high cis-butadiene rubber, 0.8 part of carbon black modifier DC-01, 1.5 parts of carbon nanotube GT-300, 48 parts of N330 carbon black, 10 parts of white carbon black HD175MP, 5 parts of zinc oxide, 2 parts of stearic acid, 1 part of C5 tackifying resin, 1 part of resorcinol formaldehyde resin, 8 parts of aromatic oil, 1.5 parts of anti-aging agent 4020, 0.5 part of anti-aging agent RD, 2 parts of adhesive RA65, 1.2 parts of accelerator CZ, 3.5 parts of insoluble sulfur OT-20 and 0.2 part of anti-scorching agent CTP.
A preparation method of nylon bead wrapping rubber for an all-steel truck tire adopts a one-step continuous low-temperature mixing (OMS low-temperature mixing) process, and comprises the following steps:
mixing master batch by an internal mixer: putting natural rubber, eucommia rubber, high cis-butadiene rubber, carbon nano tubes, N330 carbon black, white carbon black HD175MP, zinc oxide, stearic acid, 203 tackifying resin, resorcinol formaldehyde resin, aromatic oil and an anti-aging agent into an internal mixer for mixing, wherein the top plug pressure is 16MPa, the rotor rotating speed is 40r/min, the rubber discharge temperature is 145 ℃ and the time is 140s, so as to obtain a master batch;
mixing the final rubber mixing with an open mill: and (2) directly conveying the master batch obtained in the step (1) to an open mill for supplementary mixing and cooling, when the temperature of the rubber is less than or equal to 75 ℃, putting an adhesive RA65, an accelerant CZ, insoluble sulfur powder, a carbon black modifier and an anti-coking agent into the open mill for mixing, wherein the roll distance of the open mill is set to be 3.5mm, the rotating speed of the open mill is set to be 30r/min, the rubber discharge temperature is set to be 95 ℃, and the mixing time of the open mill is controlled to be 700 seconds, so that the nylon bead wrapping rubber of the all-steel truck tire is obtained.
Comparative example 1
The nylon bead wrapping rubber for the all-steel truck tire comprises the following components in parts by weight: 82 parts of natural rubber, 3 parts of synthetic eucommia rubber, 15 parts of high cis-butadiene rubber, 48 parts of N330 carbon black, 10 parts of white carbon black HD175MP, 5 parts of zinc oxide, 2 parts of stearic acid, 1 part of C5 tackifying resin, 1 part of resorcinol formaldehyde resin, 8 parts of aromatic oil, 1.5 parts of anti-aging agent 4020, 0.5 part of anti-aging agent RD, 2 parts of adhesive RA65, 1.2 parts of accelerator CZ, 3.5 parts of insoluble sulfur OT-20 and 0.2 part of antiscorching agent CTP.
A preparation method of nylon bead wrapping rubber for all-steel truck tires comprises the following steps:
first-stage mixing: putting natural rubber, high cis-butadiene rubber, N330 carbon black, white carbon black HD175MP, zinc oxide, stearic acid, C5 tackifying resin, resorcinol formaldehyde resin, aromatic oil and an anti-aging agent into an internal mixer for mixing, wherein the upper plug pressure is 18MPa, the rotor speed is 50r/min, the rubber discharge temperature is 155 ℃, and the time is 150s, so as to obtain a rubber compound;
and (3) second-stage mixing: putting the first-stage rubber compound obtained in the step (1) into an internal mixer for mixing, wherein the top plug pressure is 18MPa, the rotor rotating speed is 50r/min, the rubber discharging temperature is 145 ℃, and the time is 100s, so as to obtain a second-stage rubber compound;
three-stage mixing: and (3) putting the two-stage rubber compound obtained in the step (2), an adhesive RA65, an accelerator CZ, insoluble sulfur OT-20 and an anti-scorching agent CTP into an internal mixer for mixing, wherein the rotor speed is 25r/min, the upper plug pressure is 16MPa, the rubber discharge temperature is 105 ℃, and the time is 120s, so as to obtain the nylon bead wrapping rubber for the all-steel truck tire.
Comparative example 2
The nylon bead wrapping rubber for the all-steel truck tire comprises the following components in parts by weight: 72 parts of natural rubber, 13 parts of synthetic eucommia rubber, 15 parts of high cis-butadiene rubber, 0.8 part of carbon black modifier DC-01, 48 parts of N330 carbon black, 10 parts of white carbon black HD175MP, 5 parts of zinc oxide, 2 parts of stearic acid, 1 part of C5 tackifying resin, 1 part of resorcinol formaldehyde resin, 8 parts of aromatic oil, 1.5 parts of anti-aging agent 4020, 0.5 part of anti-aging agent RD, 2 parts of adhesive RA65, 1.2 parts of accelerator CZ, 3.5 parts of insoluble sulfur OT-20 and 0.2 part of anti-scorching agent CTP.
A preparation method of nylon bead wrapping rubber for an all-steel truck tire adopts a one-step continuous low-temperature mixing (OMS low-temperature mixing) process, and comprises the following steps:
mixing master batch by an internal mixer: putting natural rubber, eucommia rubber, low cis-butadiene rubber, carbon nano tubes, N326 carbon black, white carbon black HD175MP, zinc oxide, stearic acid, C5 tackifying resin, resorcinol formaldehyde resin, aromatic oil and an anti-aging agent into an internal mixer for mixing, wherein the top plug pressure is 16MPa, the rotor rotation speed is 40r/min, the rubber discharge temperature is 145 ℃ and the time is 140s, so as to obtain a master batch;
mixing the final rubber mixing with an open mill: and (2) directly conveying the master batch obtained in the step (1) to an open mill for supplementary mixing and cooling, when the temperature of the rubber is less than or equal to 75 ℃, putting an adhesive RA65, an accelerant CZ, insoluble sulfur powder, a carbon black modifier and an anti-coking agent into the open mill for mixing, wherein the roll distance of the open mill is set to be 3.5mm, the rotating speed of the open mill is set to be 30r/min, the rubber discharge temperature is set to be 95 ℃, and the mixing time of the open mill is controlled to be 700 seconds, so that the nylon bead cloth coating rubber of the all-steel truck tire is obtained.
The nylon bead wrapping rubber for the all-steel truck tire obtained in the embodiment 1-2 and the comparative example 1-2 is vulcanized, wherein the vulcanization conditions are as follows: the physical property test parameters of the vulcanized rubber obtained at 151 ℃ for 30 minutes are shown in Table 1.
TABLE 1 all-steel truck tire nylon bead wrapping rubber physical property parameters after vulcanization
From the physical property test results shown in table 1, it can be seen that: in the all-steel heavy-duty tire nylon bead coating adhesive, the tear strength, the H extraction force, the bending and cracking performance and the high-temperature modulus of the rubber material of the implementation case are improved compared with those of the comparison case, and the heat generation of the rubber material is reduced, so that the all-steel heavy-duty tire bead coating adhesive has better adhesive force, high dynamic modulus, low heat generation and excellent tear resistance, the damage resistance of the nylon bead coating adhesive can be effectively improved, the bearing resistance and the safety performance of the tire are further improved, and the service life of the tire is further prolonged.
According to the nylon bead cloth coating rubber for the all-steel truck tire, rubber and filler can be mixed more uniformly and fully to exert the respective excellent performances of the carbon nano tube and the eucommia rubber through an OMS (organic polymer technology) low-temperature mixing process; through the embodiment 1 and the comparative example 1, the synergistic effect of the carbon nanotubes and the carbon black modifier can be found out to improve the adhesive force and the tear resistance of the coating rubber and reduce the heat generation; the dynamic modulus and the fatigue resistance of the coating rubber can be improved by the synergistic effect of the eucommia ulmoides rubber and the carbon black modifier, and the damage resistance of the coating rubber is further improved; the carbon nano tube, the eucommia rubber and the carbon black modifier are used together, so that a certain synergistic enhancement effect is achieved, and the comprehensive performance of the coating rubber can be further improved; meanwhile, a new application direction is explored for the application of the carbon nano tube and the eucommia rubber in the tire.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. The nylon bead wrapping rubber for the all-steel truck tire is characterized by comprising the following components in parts by weight: 70-93 parts of natural rubber, 2-20 parts of eucommia rubber, 5-20 parts of butadiene rubber, 40-55 parts of carbon black, 0.1-2 parts of carbon black modifier, 0.1-3 parts of carbon nano tube, 5-15 parts of white carbon black, 3-6 parts of zinc oxide, 1-3 parts of stearic acid, 0.5-3 parts of tackifying resin, 0.5-2 parts of resorcinol formaldehyde resin, 651-3 parts of adhesive, 1-3 parts of anti-aging agent, 5-10 parts of rubber filling oil, 0.5-2 parts of promoter CZ, 2-5 parts of insoluble sulfur powder and 0.1-0.5 part of anti-scorching agent CTP.
2. The nylon bead wrapping rubber for all-steel truck tires according to claim 1, characterized in that, the eucommia rubber is natural eucommia rubber or synthetic eucommia rubber; the cis-butadiene rubber is low cis-butadiene rubber or high cis-butadiene rubber.
3. All-steel truck tire nylon of claim 1The coated adhesive is characterized in that the carbon nano tube is a gas-phase precipitation multi-wall agglomerated carbon nano tube, the tube diameter of the carbon nano tube is 10-15 nm, the length of the carbon nano tube is 3-10 mu m, and the specific surface area of the carbon nano tube is 250-290 m2/g。
4. The nylon bead wrapping rubber for all-steel heavy-duty tires according to claim 1, characterized in that the white carbon black is HD165MP and/or HD175 MP; the carbon black is N330 or N326.
5. The nylon bead wrapping rubber for all-steel heavy-duty tires according to claim 1, characterized in that, the carbon black modifier specifically comprises at least one compound represented by the following formula (I):
wherein R1 and R2 respectively represent aromatic hydrocarbon groups with 6-30 carbon atoms, alkane groups with 6-30 carbon atoms, or alkyl aromatic hydrocarbon groups with 6-30 carbon atoms, or R1 is hydrogen, or R2 is hydrogen.
6. The nylon bead wrapping rubber for all-steel heavy-duty tires according to claim 1, characterized in that, the tackifying resin is one or two of C5 tackifying resin, 203 tackifying resin and 204 tackifying resin; the rubber filling oil is aromatic oil, environment-friendly aromatic oil or naphthenic oil.
7. The nylon bead wrapping rubber for the all-steel truck tires according to claim 1, wherein the anti-aging agent is two or three of anti-aging agent 4020, anti-aging agent RD and anti-aging agent 3100.
8. The nylon bead wrapping rubber for all-steel truck tires according to claim 1, characterized in that, the insoluble sulfur IS insoluble sulfur OT-20 or insoluble sulfur IS 6033.
9. The preparation method of the nylon bead cloth coating adhesive for the all-steel truck tire of claim 1 is characterized in that a one-step continuous low-temperature mixing process is adopted, and the preparation method comprises the following steps:
(1) mixing master batch by an internal mixer: putting 70-93 parts of natural rubber, 2-20 parts of eucommia rubber, 5-20 parts of butadiene rubber, 40-55 parts of carbon black, 0.1-2 parts of carbon black modifier, 0.1-3 parts of carbon nano tube, 5-15 parts of white carbon black, 3-6 parts of zinc oxide, 1-3 parts of stearic acid, 0.5-3 parts of tackifying resin, 0.5-2 parts of resorcinol formaldehyde resin, 1-3 parts of anti-aging agent and 5-10 parts of rubber filling oil into an internal mixer for mixing, wherein the top plug pressure is 6-18 MPa, the rotor speed is 40-50 r/min, the rubber discharge temperature is 140-155 ℃, and the time is 135-160 s, so as to obtain a master batch;
(2) mixing the final rubber mixing with an open mill: directly conveying the masterbatch obtained in the step (1) to an open mill for supplementary mixing and cooling, when the temperature of the masterbatch is less than or equal to 75 ℃, putting 1-3 parts of binder RA65, 0.5-2 parts of promoter CZ, 2-5 parts of insoluble sulfur powder and 0.1-0.5 part of antiscorching agent CTP into the open mill for mixing, controlling the roll distance of the open mill to be 2.5-4 mm, controlling the rotating speed of the open mill to be 20-40 r/min, controlling the rubber discharge temperature to be 85-100 ℃, controlling the mixing time of the open mill to be 600-800 s, and obtaining the nylon bead wrapping cloth rubber of the all-steel truck tire after mixing.
10. The preparation method of the nylon bead filler rubber for the all-steel truck tires according to claim 9, characterized in that the internal mixer in step (1) is a GK320E internal mixer, and the open mill in step (2) is a phi 660 x 2130mm open mill.
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Application publication date: 20210924 |