CN115232378B - Flame-retardant high-temperature-resistant synchronous belt sizing material and preparation method and application thereof - Google Patents
Flame-retardant high-temperature-resistant synchronous belt sizing material and preparation method and application thereof Download PDFInfo
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- CN115232378B CN115232378B CN202210868394.7A CN202210868394A CN115232378B CN 115232378 B CN115232378 B CN 115232378B CN 202210868394 A CN202210868394 A CN 202210868394A CN 115232378 B CN115232378 B CN 115232378B
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 134
- 239000000463 material Substances 0.000 title claims abstract description 80
- 238000004513 sizing Methods 0.000 title claims abstract description 72
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 239000003063 flame retardant Substances 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims abstract description 32
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- 239000003431 cross linking reagent Substances 0.000 claims abstract description 57
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000006229 carbon black Substances 0.000 claims abstract description 34
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 30
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 25
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 21
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 21
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 21
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 21
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 21
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 21
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 21
- 239000008117 stearic acid Substances 0.000 claims abstract description 21
- 239000011787 zinc oxide Substances 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 20
- BMFMTNROJASFBW-UHFFFAOYSA-N 2-(furan-2-ylmethylsulfinyl)acetic acid Chemical compound OC(=O)CS(=O)CC1=CC=CO1 BMFMTNROJASFBW-UHFFFAOYSA-N 0.000 claims abstract description 19
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 15
- 239000001301 oxygen Substances 0.000 claims abstract description 15
- 150000001875 compounds Chemical class 0.000 claims description 28
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 17
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 16
- 239000003963 antioxidant agent Substances 0.000 claims description 13
- 230000003078 antioxidant effect Effects 0.000 claims description 13
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 12
- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 11
- 150000002978 peroxides Chemical group 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 7
- 238000002791 soaking Methods 0.000 claims description 7
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 6
- ZRMMVODKVLXCBB-UHFFFAOYSA-N 1-n-cyclohexyl-4-n-phenylbenzene-1,4-diamine Chemical compound C1CCCCC1NC(C=C1)=CC=C1NC1=CC=CC=C1 ZRMMVODKVLXCBB-UHFFFAOYSA-N 0.000 claims description 3
- ZZMVLMVFYMGSMY-UHFFFAOYSA-N 4-n-(4-methylpentan-2-yl)-1-n-phenylbenzene-1,4-diamine Chemical compound C1=CC(NC(C)CC(C)C)=CC=C1NC1=CC=CC=C1 ZZMVLMVFYMGSMY-UHFFFAOYSA-N 0.000 claims description 3
- 238000005984 hydrogenation reaction Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 230000000052 comparative effect Effects 0.000 description 31
- 229920001971 elastomer Polymers 0.000 description 21
- 239000002994 raw material Substances 0.000 description 12
- 230000005540 biological transmission Effects 0.000 description 10
- 239000000779 smoke Substances 0.000 description 10
- 230000032683 aging Effects 0.000 description 8
- 238000005299 abrasion Methods 0.000 description 6
- 238000004132 cross linking Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 238000005303 weighing Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 229920003225 polyurethane elastomer Polymers 0.000 description 5
- BJELTSYBAHKXRW-UHFFFAOYSA-N 2,4,6-triallyloxy-1,3,5-triazine Chemical compound C=CCOC1=NC(OCC=C)=NC(OCC=C)=N1 BJELTSYBAHKXRW-UHFFFAOYSA-N 0.000 description 4
- 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 description 4
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 4
- 235000019400 benzoyl peroxide Nutrition 0.000 description 4
- 238000011010 flushing procedure Methods 0.000 description 4
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- 238000002604 ultrasonography Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 108010039224 Amidophosphoribosyltransferase Proteins 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
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- 230000000694 effects Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229920001084 poly(chloroprene) Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000000391 smoking effect Effects 0.000 description 2
- GOKFBDXJQGPRML-UHFFFAOYSA-N 2-ethylperoxy-2-methylpropane Chemical compound CCOOC(C)(C)C GOKFBDXJQGPRML-UHFFFAOYSA-N 0.000 description 1
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 1
- 238000009775 high-speed stirring Methods 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- C08L15/00—Compositions of rubber derivatives
- C08L15/005—Hydrogenated nitrile rubber
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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)
Abstract
The invention discloses a flame-retardant high-temperature-resistant synchronous belt sizing material, and a preparation method and application thereof. The invention comprises the following components: 50-80 parts of hydrogenated nitrile rubber, 20-50 parts of ethylene-vinyl acetate rubber, 3-6 parts of polytetrafluoroethylene, 40-60 parts of sepiolite, 3-7 parts of zinc methacrylate, 20-50 parts of carbon black, 2-4 parts of zinc oxide, 1-3 parts of stearic acid, 1-3 parts of an anti-aging agent, 3-8 parts of a cross-linking agent and 2-4 parts of a co-cross-linking agent. The invention greatly improves the high temperature resistance of the obtained synchronous belt sizing material, and the temperature resistance reaches 170 ℃; the synchronous belt sizing material also greatly improves the flame retardant property, reduces the fuming amount of the synchronous belt sizing material, and has an oxygen index of more than 45; meanwhile, the synchronous belt sizing material also improves the wear resistance and greatly reduces the friction coefficient.
Description
Technical Field
The invention belongs to the technical field of synchronous belts, and particularly relates to a flame-retardant high-temperature-resistant synchronous belt sizing material, and a preparation method and application thereof.
Background
Synchronous belts, also known as toothed belts, timing belts, slip-free belts, etc. The synchronous belt is a flexible transmission mode similar to the common belt transmission modes such as a common V belt, a flat belt and the like. The synchronous belt can be used for transmitting motion and power and is also commonly used for positioning a mechanism in a servo mechanism. The synchronous belt transmission consists of an annular belt with equidistant tooth shape on the inner peripheral surface and corresponding matched wheels, integrates the respective advantages of belt transmission, chain transmission and gear transmission, and has the advantages of high transmission efficiency, accurate transmission ratio, large transmission ratio range, stable transmission, small acting force on a shaft, low noise, energy saving and the like.
The prior synchronous belt main body is mostly made of polyurethane rubber, the polyurethane rubber has the advantages of common liquid rubber, good wear resistance, simple process and convenient molding, but the polyurethane rubber has poor heat resistance and water resistance, is easy to be sticky at about 80 ℃, is easy to hydrolyze in a moist environment, and leads to obvious reduction of the strength of the synchronous belt, and the synchronous belt can only be used in a smaller temperature range. However, in some synchronous belt applications, the synchronous belt is required to withstand extremely high and low temperatures under long-term dynamic loads, such as automobile synchronous belts, and the synchronous belt is required to work for a long period of time at-40 to 150 ℃ (instantaneously reaching 175 ℃), and is excellent in heat resistance. Therefore, the existing polyurethane rubber compound cannot produce the synchronous belt meeting the requirements.
Disclosure of Invention
The invention aims to provide a flame-retardant high-temperature-resistant synchronous belt sizing material, a preparation method and application thereof, and aims to solve the problem that the synchronous belt prepared from polyurethane rubber sizing material in the prior art is poor in high-temperature resistance and cannot meet the requirement of application of an automobile synchronous belt under extreme conditions.
In order to solve the technical problems, the invention is mainly realized by the following technical scheme:
In one aspect, the flame-retardant high-temperature-resistant synchronous belt sizing material comprises the following components in parts by weight: 50-80 parts of hydrogenated nitrile rubber, 20-50 parts of ethylene-vinyl acetate rubber, 3-6 parts of polytetrafluoroethylene, 40-60 parts of sepiolite, 3-7 parts of zinc methacrylate, 20-50 parts of carbon black, 2-4 parts of zinc oxide, 1-3 parts of stearic acid, 1-3 parts of an anti-aging agent, 3-8 parts of a cross-linking agent and 2-4 parts of a co-cross-linking agent.
In the invention, the hydrogenated nitrile rubber (HNBR) has excellent oil resistance, chemical stability and higher mechanical properties, and the common heat-resistant temperature is 150 ℃ at most, but does not have flame retardant property; the ethylene-vinyl acetate rubber has flame retardant property with the heat-resistant temperature reaching 175 ℃, the oxygen index reaching 50 and smaller smoke during combustion; the polytetrafluoroethylene also has flame retardance, and the addition of the polytetrafluoroethylene also reduces the friction coefficient of the synchronous belt sizing material, so that the synchronous belt is more wear-resistant; the sepiolite has a porous structure, has the function of filler and flame retardant property, can adsorb smoke generated during combustion of the synchronous belt, and has the function of suppressing smoke; according to the invention, hydrogenated nitrile rubber and ethylene-vinyl acetate rubber are scientifically matched, polytetrafluoroethylene and sepiolite are added, and under the action of carbon black, zinc methacrylate, zinc oxide, stearic acid, an anti-aging agent, a cross-linking agent and a crosslinking aid, the high temperature resistance of the obtained synchronous belt rubber material is greatly improved, and the temperature resistance reaches 170 ℃; the synchronous belt sizing material also greatly improves the flame retardant property, reduces the fuming amount of the synchronous belt sizing material, and has an oxygen index of more than 45; meanwhile, the synchronous belt sizing material also improves the wear resistance and greatly reduces the friction coefficient.
As a preferred embodiment, the sepiolite is a modified sepiolite, and the preparation method of the modified sepiolite comprises the following steps: a) Adding sepiolite into 30% hydrogen peroxide, soaking for 0.5-1.5h under ultrasonic condition, filtering, and washing to obtain treated sepiolite; b) Adding hexadecyl trimethyl ammonium bromide into the treated sepiolite obtained in the step a), wherein the mass ratio of the treated sepiolite to the hexadecyl trimethyl ammonium bromide is 100:0.5-1, and modifying for 2-4min at 50-60 ℃ at the stirring speed of 200-400r/min to obtain the modified sepiolite.
The modified sepiolite is adopted, the compatibility of the modified sepiolite and the synchronous belt sizing material matrix material, namely the hydrogenated nitrile rubber and the ethylene-vinyl acetate rubber is better, after the sepiolite is modified, the porous structure of the sepiolite is opened, the void ratio is increased, the specific surface area is increased, and the specific surface area is increased from 100m 2/g to about 200m 2/g; therefore, the smoking flame retardant property of the modified sepiolite is greatly improved. According to the invention, after the cetyl trimethyl ammonium bromide is added, the treated sepiolite is modified in a high-speed stirring mode, and the Cetyl Trimethyl Ammonium Bromide (CTAB) is used for carrying out surface modification on the treated sepiolite, so that the compatibility of the modified sepiolite and a synchronous belt sizing material matrix material is increased; meanwhile, after the sepiolite disclosed by the invention is treated by hydrogen peroxide, the holes on the surface of the sepiolite are exposed, so that the porous structure of the sepiolite is increased, the specific surface area of the sepiolite is increased, and the smoking and flame-retardant properties of the sepiolite are improved.
As a preferred embodiment, the hydrogenated nitrile rubber has a degree of hydrogenation of 95 to 98% and the acrylonitrile content of the hydrogenated nitrile rubber is 34 to 40%. The acrylonitrile content affects the high temperature resistance and oil resistance of the hydrogenated nitrile, and the acrylonitrile content is high, so that the high temperature resistance and oil resistance are good; the hydrogenated nitrile rubber has the advantages of wide source, low cost and easy obtainment, and has low acrylonitrile content and poor oil resistance and Gao Wenbian resistance.
As a preferred embodiment, the ethylene-vinyl acetate rubber has an ethyl acetate content of greater than 60%. The ethylene-vinyl acetate rubber has high ethyl acetate content, and has better high-temperature resistance and flame retardance.
As a preferred embodiment, the carbon black is carbon black 330 or carbon black 550. The carbon black is a filler, and the use of the carbon black increases the high temperature resistance and the wear resistance of the synchronous belt sizing material.
As a preferred embodiment, the antioxidant is any one of an antioxidant 445, an antioxidant RD, an antioxidant 4020, an antioxidant 4010, and an antioxidant 2020 NA. The anti-aging agent is added, so that the anti-aging performance of the synchronous belt sizing material is further improved, and the anti-aging agent is wide in variety, wide in source and convenient to use.
As a preferred embodiment, the crosslinking agent is a peroxide crosslinking agent, and the peroxide crosslinking agent is any one of DCP, BIBP, double 25 and BPO. The crosslinking agent is peroxide crosslinking agent, and the crosslinking agent DCP (dicumyl peroxide), BIBP (di- (2-tert-butyl peroxy isopropyl) benzene), bis 25 (known as 101, DBPH-99,2,5-dimethyl-2, 5-bis (tert-butyl peroxy) ethane) and BPO (dibenzoyl peroxide) have excellent performance and good use effect.
As a preferred embodiment, the auxiliary crosslinking agent is any one of TAIC, TAC, TMP. The auxiliary crosslinking agent mainly promotes peroxide to generate crosslinking reaction, so that the crosslinking reaction is faster; the auxiliary crosslinking agents TAIC (triallyl isocyanurate), TAC (triallyl cyanurate) and TMP (trimethylolpropane) can be well matched with the peroxide crosslinking agent, and the crosslinking effect is good.
In another aspect, the preparation method of the flame-retardant high-temperature-resistant synchronous belt sizing material comprises the following steps: mixing hydrogenated nitrile rubber and ethylene-vinyl acetate rubber, and banburying at 70-100deg.C for 1-2min; adding zinc methacrylate, carbon black, zinc oxide, stearic acid and an anti-aging agent, and continuously banburying for 1-3min; adding polytetrafluoroethylene and sepiolite, and banburying for 3-6min; finally, adding a crosslinking agent and an auxiliary crosslinking agent, and continuously banburying for 1-3min; vulcanizing for 20-30min at 160-180 ℃ to obtain the synchronous belt sizing material.
Firstly, mixing and banburying hydrogenated nitrile rubber and ethylene-vinyl acetate rubber, then adding assistants such as zinc methacrylate, carbon black, zinc oxide, stearic acid, an anti-aging agent and the like, continuously banburying, then adding polytetrafluoroethylene and sepiolite, banburying, finally, adding a cross-linking agent and an auxiliary cross-linking agent, continuously banburying, and vulcanizing to obtain the synchronous belt rubber; the preparation method has the advantages of short process flow, simple operation, no special requirement on equipment, mild reaction conditions and easy realization of industrialization.
In a further aspect, the invention relates to the application of the flame-retardant high-temperature-resistant synchronous belt sizing material, which is used for preparing the automobile synchronous belt. The synchronous belt sizing material has good high temperature resistance, and the temperature resistance can reach 170 ℃; in addition, the flame retardant has good flame retardant property, low smoke quantity and oxygen index reaching more than 45; meanwhile, the wear-resistant rubber has good wear resistance, and the friction coefficient is greatly reduced. The automobile synchronous belt prepared from the synchronous belt sizing material has good flame retardant, high temperature resistance and wear resistance, and can work for a long time at 170 ℃.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, hydrogenated nitrile rubber and ethylene-vinyl acetate rubber are scientifically matched, polytetrafluoroethylene and sepiolite are added, and under the action of carbon black, a crosslinking agent and a crosslinking aid, the high temperature resistance of the obtained synchronous belt rubber material is greatly improved, and the temperature resistance reaches 170 ℃; the synchronous belt sizing material also greatly improves the flame retardant property, reduces the fuming amount of the synchronous belt sizing material, and has an oxygen index of more than 45; meanwhile, the synchronous belt sizing material also improves the wear resistance and greatly reduces the friction coefficient; the preparation method of the synchronous belt sizing material is simple, convenient to operate, has no special requirement on equipment, has mild reaction conditions, and is easy to realize industrialization; the automobile synchronous belt prepared from the synchronous belt sizing material has good flame retardant, high temperature resistance and wear resistance, and can work for a long time at 170 ℃.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in conjunction with specific embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention relates to a flame-retardant high-temperature-resistant synchronous belt sizing material, which comprises the following components in parts by weight: 50-80 parts of hydrogenated nitrile rubber, 20-50 parts of ethylene-vinyl acetate rubber, 3-6 parts of polytetrafluoroethylene, 40-60 parts of sepiolite, 3-7 parts of zinc methacrylate, 20-50 parts of carbon black, 2-4 parts of zinc oxide, 1-3 parts of stearic acid, 1-3 parts of an anti-aging agent, 3-8 parts of a cross-linking agent and 2-4 parts of a co-cross-linking agent.
Preferably, the sepiolite is modified sepiolite, and the preparation method of the modified sepiolite comprises the following steps: a) Adding sepiolite into 30% hydrogen peroxide, soaking for 0.5-1.5h under ultrasonic condition, filtering, and washing to obtain treated sepiolite; b) Adding hexadecyl trimethyl ammonium bromide into the treated sepiolite obtained in the step a), wherein the mass ratio of the treated sepiolite to the hexadecyl trimethyl ammonium bromide is 100:0.5-1, and modifying for 2-4min at 50-60 ℃ at the stirring speed of 200-400r/min to obtain the modified sepiolite.
Preferably, the hydrogenation degree of the hydrogenated nitrile rubber is 95-98%, and the content of acrylonitrile in the hydrogenated nitrile rubber is 34-40%.
Preferably, the ethyl acetate content of the ethylene-vinyl acetate rubber is greater than 60%.
Preferably, the carbon black is carbon black 330 or carbon black 550.
Preferably, the antioxidant is any one of an antioxidant 445, an antioxidant RD, an antioxidant 4020, an antioxidant 4010, and an antioxidant 2020 NA.
Preferably, the cross-linking agent is a peroxide cross-linking agent, and the peroxide cross-linking agent is any one of DCP, BIBP, double 25 and BPO.
Preferably, the auxiliary crosslinking agent is any one of TAIC, TAC, TMP.
The invention discloses a preparation method of a flame-retardant high-temperature-resistant synchronous belt sizing material, which comprises the following steps: mixing hydrogenated nitrile rubber and ethylene-vinyl acetate rubber, and banburying at 70-100deg.C for 1-2min; adding zinc methacrylate, carbon black, zinc oxide, stearic acid and an anti-aging agent, and continuously banburying for 1-3min; adding polytetrafluoroethylene and sepiolite, and banburying for 3-6min; finally, adding a crosslinking agent and an auxiliary crosslinking agent, and continuously banburying for 1-3min; vulcanizing for 20-30min at 160-180 ℃ to obtain the synchronous belt sizing material.
The invention relates to an application of a flame-retardant high-temperature-resistant synchronous belt sizing material, which is used for preparing an automobile synchronous belt.
Example 1
The invention discloses a preparation method of a flame-retardant high-temperature-resistant synchronous belt sizing material, which comprises the following steps:
1) Modification of sepiolite
A) Adding 100g of sepiolite into 150g of 30% hydrogen peroxide, soaking for 1h under the condition of ultrasound, filtering, and flushing to obtain treated sepiolite;
b) Adding hexadecyl trimethyl ammonium bromide into the treated sepiolite obtained in the step a), wherein the mass ratio of the treated sepiolite to the hexadecyl trimethyl ammonium bromide is 100:0.5, and modifying for 2min under the stirring condition that the stirring speed is 200r/min at 50 ℃ to obtain modified sepiolite;
2) Preparation of raw materials
Sequentially weighing the following raw materials in parts by weight: 80 parts of hydrogenated nitrile rubber, 20 parts of ethylene-vinyl acetate rubber, 3 parts of polytetrafluoroethylene, 40 parts of modified sepiolite obtained in the step 1), 5 parts of zinc methacrylate, 330 parts of carbon black N, 3 parts of zinc oxide, 2 parts of stearic acid, 445 parts of an anti-aging agent, 40 parts of a cross-linking agent BIBP-40 and 2 parts of a auxiliary cross-linking agent TAIC;
3) Preparation of synchronous belt sizing material
Mixing hydrogenated nitrile rubber and ethylene-vinyl acetate rubber, and banburying for 2min at 70 ℃; adding zinc methacrylate, carbon black, zinc oxide, stearic acid and an anti-aging agent, and carrying out banburying for 1min; adding polytetrafluoroethylene and sepiolite, and continuing banburying for 6min; finally, adding a crosslinking agent and an auxiliary crosslinking agent, and continuously banburying for 1min; and vulcanizing for 30min at 160 ℃ to obtain the synchronous belt sizing material.
Example two
The invention discloses a preparation method of a flame-retardant high-temperature-resistant synchronous belt sizing material, which comprises the following steps:
1) Modification of sepiolite
A) Adding 100g of sepiolite into 150g of 30% hydrogen peroxide, soaking for 0.5h under the condition of ultrasound, filtering, and flushing to obtain treated sepiolite;
b) Adding hexadecyl trimethyl ammonium bromide into the treated sepiolite obtained in the step a), wherein the mass ratio of the treated sepiolite to the hexadecyl trimethyl ammonium bromide is 100:1, and modifying for 4min under the stirring condition that the stirring speed is 400r/min at 60 ℃ to obtain modified sepiolite;
2) Preparation of raw materials
Sequentially weighing the following raw materials in parts by weight: 50 parts of hydrogenated nitrile rubber, 50 parts of ethylene-vinyl acetate rubber, 3 parts of polytetrafluoroethylene, 40 parts of modified sepiolite obtained in the step 1), 5 parts of zinc methacrylate, 330 parts of carbon black N, 3 parts of zinc oxide, 2 parts of stearic acid, 445 parts of an anti-aging agent, 40 parts of a cross-linking agent BIBP-40 and 2 parts of a auxiliary cross-linking agent TAIC;
3) Preparation of synchronous belt sizing material
Mixing hydrogenated nitrile rubber and ethylene-vinyl acetate rubber, and banburying for 1min at 100deg.C; adding zinc methacrylate, carbon black, zinc oxide, stearic acid and an anti-aging agent, and carrying out banburying for 3min; adding polytetrafluoroethylene and sepiolite, and continuing banburying for 3min; finally, adding a crosslinking agent and an auxiliary crosslinking agent, and continuously banburying for 3min; and vulcanizing for 20min at 180 ℃ to obtain the synchronous belt sizing material.
Example III
The invention discloses a preparation method of a flame-retardant high-temperature-resistant synchronous belt sizing material, which comprises the following steps:
1) Modification of sepiolite
A) Adding 100g of sepiolite into 150g of 30% hydrogen peroxide, soaking for 1h under the condition of ultrasound, filtering, and flushing to obtain treated sepiolite;
b) Adding hexadecyl trimethyl ammonium bromide into the treated sepiolite obtained in the step a), wherein the mass ratio of the treated sepiolite to the hexadecyl trimethyl ammonium bromide is 100:0.8, and modifying for 3min under the stirring condition that the stirring speed is 300r/min at 55 ℃ to obtain modified sepiolite;
2) Preparation of raw materials
Sequentially weighing the following raw materials in parts by weight: 50 parts of hydrogenated nitrile rubber, 50 parts of ethylene-vinyl acetate rubber, 3 parts of polytetrafluoroethylene, 60 parts of modified sepiolite obtained in the step 1), 5 parts of zinc methacrylate, 330 parts of carbon black N, 3 parts of zinc oxide, 2 parts of stearic acid, 445 parts of an anti-aging agent, 40 parts of a cross-linking agent BIBP-40 and 2 parts of a auxiliary cross-linking agent TAIC;
3) Preparation of synchronous belt sizing material
Mixing hydrogenated nitrile rubber and ethylene-vinyl acetate rubber, and banburying at 85deg.C for 1.5min; adding zinc methacrylate, carbon black, zinc oxide, stearic acid and an anti-aging agent, and carrying out banburying for 2min; adding polytetrafluoroethylene and sepiolite, and continuing banburying for 5min; finally, adding a crosslinking agent and an auxiliary crosslinking agent, and carrying out banburying for 2min; and vulcanizing at 170 ℃ for 25min to obtain the synchronous belt sizing material.
Example IV
The invention discloses a preparation method of a flame-retardant high-temperature-resistant synchronous belt sizing material, which comprises the following steps:
1) Modification of sepiolite
A) Adding 100g of sepiolite into 150g of 30% hydrogen peroxide, soaking for 1.5h under the condition of ultrasound, filtering, and flushing to obtain treated sepiolite;
b) Adding hexadecyl trimethyl ammonium bromide into the treated sepiolite obtained in the step a), wherein the mass ratio of the treated sepiolite to the hexadecyl trimethyl ammonium bromide is 100:0.5, and modifying for 3min under the stirring condition that the stirring speed is 300r/min at 55 ℃ to obtain modified sepiolite;
2) Preparation of raw materials
Sequentially weighing the following raw materials in parts by weight: 50 parts of hydrogenated nitrile rubber, 50 parts of ethylene-vinyl acetate rubber, 6 parts of polytetrafluoroethylene, 60 parts of modified sepiolite obtained in the step 1), 5 parts of zinc methacrylate, 330 parts of carbon black N, 3 parts of zinc oxide, 2 parts of stearic acid, 445 parts of an anti-aging agent, 7 parts of a cross-linking agent BIBP-40 and 2 parts of a auxiliary cross-linking agent TAIC;
3) Preparation of synchronous belt sizing material
Mixing hydrogenated nitrile rubber and ethylene-vinyl acetate rubber, and banburying for 2min at 80 ℃; adding zinc methacrylate, carbon black, zinc oxide, stearic acid and an anti-aging agent, and carrying out banburying for 2min; adding polytetrafluoroethylene and sepiolite, and banburying for 4min; finally, adding a crosslinking agent and an auxiliary crosslinking agent, and carrying out banburying for 2min; and vulcanizing at 170 ℃ for 25min to obtain the synchronous belt sizing material.
Comparative example 1
The preparation method of the synchronous belt sizing material comprises the following steps:
1) Preparation of raw materials
Sequentially weighing the following raw materials in parts by weight: 100 parts of neoprene, 550 parts of carbon black N, 2 parts of dispersing agent AT-C, 1 part of antioxidant 6PPD, 1 part of stearic acid, 6 parts of magnesium oxide and 8 parts of zinc oxide;
2) Preparation of synchronous belt sizing material
Taking chloroprene rubber, and banburying for 2min at 80 ℃; adding carbon black N550, a dispersing agent AT-C, an anti-aging agent 6PPD and stearic acid, and carrying out banburying for 6min; adding magnesium oxide and zinc oxide, and banburying for 4min; and vulcanizing at 170 ℃ for 25min to obtain the synchronous belt sizing material.
Comparative example 2
The preparation method of the synchronous belt sizing material comprises the following steps:
1) Preparation of raw materials
Sequentially weighing the following raw materials in parts by weight: 100 parts of hydrogenated nitrile rubber, 5 parts of zinc methacrylate, 330 parts of carbon black N, 3 parts of zinc oxide, 2 parts of stearic acid, 7 parts of a cross-linking agent BIBP-40 and 2 parts of a auxiliary cross-linking agent TAIC;
2) Preparation of synchronous belt sizing material
Taking hydrogenated nitrile rubber, and banburying for 2min at 80 ℃; adding zinc methacrylate, carbon black N330, zinc oxide and stearic acid, and carrying out banburying for 2min; finally, adding a cross-linking agent BIBP-40 and a auxiliary cross-linking agent TAIC, and carrying out banburying for 2min; and vulcanizing at 170 ℃ for 25min to obtain the synchronous belt sizing material.
The synchronous belt compounds obtained in examples one to four, comparative examples 1 and 2 were subjected to mechanical property, flame retardant property and aging resistance test respectively, including tensile strength, elongation at break, oxygen index and smoke generation rate, wherein the tensile strength was tested on an electronic tensile machine according to national standard GB/T528-2009, the elongation at break was tested on an electronic tensile machine according to GB/T529-2008, the oxygen index was tested according to oxygen index test standard prescribed by oxygen index method for measuring combustion properties of rubber, the smoke generation rate was tested by cone calorimeter, the abrasion volume was tested according to abrasion test prescribed by GB/T25262-2010 "vulcanized rubber or thermoplastic rubber", the aging resistance was taken out after the test sample was put in an oven at 170℃for 48 hours, the tensile strength was measured again according to the above method, and the test results are shown in Table 1.
TABLE 1 results of Performance test of different synchronous belt sizes
As can be seen from Table 1, the tensile strength of the synchronous belt compound obtained by the invention is 17.2-19.5MPa, the tensile strength of the synchronous belt compound of comparative example 1 is 17.2MPa, and the tensile strength of the synchronous belt compound of comparative example 2 is 19.8MPa; accordingly, the tensile strength of the synchronous belt compound obtained in the present invention was substantially identical to that of the synchronous belt compounds of comparative example 1 and comparative example 2. The elongation at break of the synchronous belt rubber material obtained by the invention is 342-368%, the elongation at break of the synchronous belt rubber material of comparative example 1 is 364%, and the elongation at break of the synchronous belt rubber material of comparative example 2 is 372%; therefore, the elongation at break of the synchronous belt compound obtained by the invention is also substantially identical to that of the synchronous belt compounds of comparative example 1 and comparative example 2. Therefore, the synchronous belt rubber compound obtained by the invention has similar mechanical properties to those of the synchronous belt rubber compounds of the comparative example 1 and the comparative example 2.
As can be seen from Table 1, the oxygen index of the synchronous belt compound obtained by the invention is 45-48, the oxygen index of the synchronous belt compound of comparative example 1 is 31, and the oxygen index of the synchronous belt compound of comparative example 2 is 27; therefore, the oxygen index of the synchronous belt compound obtained by the invention is obviously improved compared with that of the synchronous belt compounds of comparative examples 1 and 2. The smoke generating rate of the synchronous belt sizing material obtained by the invention is 0.019-0.032m 2/s, the smoke generating rate of the synchronous belt sizing material of comparative example 1 is 0.063m 2/s, and the smoke generating rate of the synchronous belt sizing material of comparative example 2 is 0.041m 2/s; therefore, the smoke generation rate of the synchronous belt compound obtained by the invention is obviously reduced compared with that of the synchronous belt compounds of comparative examples 1 and 2. Therefore, compared with the synchronous belt rubber materials of comparative example 1 and comparative example 2, the synchronous belt rubber material obtained by the invention has obviously improved flame retardant property.
As can be seen from Table 1, the abrasion volume of the synchronous belt rubber obtained by the invention is 36-39mm 3, the abrasion volume of the synchronous belt rubber of comparative example 1 reaches 81mm 3, and the abrasion volume of the synchronous belt rubber of comparative example 2 reaches 76mm 3; therefore, the abrasion volume of the synchronous belt sizing material obtained by the invention is obviously reduced compared with that of the synchronous belt sizing materials of comparative examples 1 and 2. Therefore, the synchronous belt rubber compound obtained by the invention has better wear resistance than the synchronous belt rubber compounds of comparative example 1 and comparative example 2.
As can be seen from Table 1, the tensile strength of the synchronous belt sizing material obtained by the invention after aging is 15.2-16.5MPa, the tensile strength of the synchronous belt sizing material of comparative example 1 after aging is only 2.3MPa, and the tensile strength of the synchronous belt sizing material of comparative example 2 after aging is 13.6MPa; therefore, the tensile strength of the synchronous belt sizing material obtained by the invention after aging is obviously improved compared with that of the synchronous belt sizing materials of comparative examples 1 and 2 after aging. Therefore, the synchronous belt rubber compound obtained by the invention has better ageing resistance than the synchronous belt rubber compounds of the comparative example 1 and the comparative example 2.
Therefore, compared with the prior art, the invention has the beneficial effects that: according to the invention, hydrogenated nitrile rubber and ethylene-vinyl acetate rubber are scientifically matched, polytetrafluoroethylene and sepiolite are added, and under the action of carbon black, a crosslinking agent and a crosslinking aid, the high temperature resistance of the obtained synchronous belt rubber material is greatly improved, and the temperature resistance reaches 170 ℃; the synchronous belt sizing material also greatly improves the flame retardant property, reduces the fuming amount of the synchronous belt sizing material, and has an oxygen index of more than 45; meanwhile, the synchronous belt sizing material also improves the wear resistance and greatly reduces the friction coefficient; the preparation method of the synchronous belt sizing material is simple, convenient to operate, has no special requirement on equipment, has mild reaction conditions, and is easy to realize industrialization; the automobile synchronous belt prepared from the synchronous belt sizing material has good flame retardant, high temperature resistance and wear resistance, and can work for a long time at 170 ℃.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (7)
1. A flame-retardant high-temperature-resistant synchronous belt sizing material is characterized in that:
The synchronous belt sizing material is prepared from the following components in parts by weight: 50-80 parts of hydrogenated nitrile rubber, 20-50 parts of ethylene-vinyl acetate rubber, 3-6 parts of polytetrafluoroethylene, 40-60 parts of sepiolite, 3-7 parts of zinc methacrylate, 20-50 parts of carbon black, 2-4 parts of zinc oxide, 1-3 parts of stearic acid, 1-3 parts of an anti-aging agent, 3-8 parts of a cross-linking agent and 2-4 parts of a co-cross-linking agent;
The sepiolite is modified sepiolite, and the preparation method of the modified sepiolite comprises the following steps: a) Adding sepiolite into 30% hydrogen peroxide, soaking for 0.5-1.5h under ultrasonic condition, filtering, and washing to obtain treated sepiolite; b) Adding hexadecyl trimethyl ammonium bromide into the treated sepiolite obtained in the step a), wherein the mass ratio of the treated sepiolite to the hexadecyl trimethyl ammonium bromide is 100:0.5-1, and modifying for 2-4min at 50-60 ℃ at the stirring speed of 200-400r/min to obtain modified sepiolite;
The preparation method of the synchronous belt sizing material comprises the following steps: mixing hydrogenated nitrile rubber and ethylene-vinyl acetate rubber, and banburying at 70-100deg.C for 1-2min; adding zinc methacrylate, carbon black, zinc oxide, stearic acid and an anti-aging agent, and continuously banburying for 1-3min; adding polytetrafluoroethylene and sepiolite, and banburying for 3-6min; finally, adding a crosslinking agent and an auxiliary crosslinking agent, and continuously banburying for 1-3min; vulcanizing for 20-30min at 160-180 ℃ to obtain synchronous belt sizing material;
the temperature resistance of the synchronous belt sizing material is 170 ℃, and the oxygen index is more than 45, so that the synchronous belt sizing material is used for preparing an automobile synchronous belt.
2. The flame retardant, high temperature resistant synchronous belt compound of claim 1, wherein:
The hydrogenation degree of the hydrogenated nitrile rubber is 95-98%, and the content of acrylonitrile in the hydrogenated nitrile rubber is 34-40%.
3. The flame retardant, high temperature resistant synchronous belt compound of claim 1, wherein:
the content of ethyl acetate in the ethylene-vinyl acetate rubber is more than 60%.
4. The flame retardant, high temperature resistant synchronous belt compound of claim 1, wherein:
the carbon black is carbon black 330 or carbon black 550.
5. The flame retardant, high temperature resistant synchronous belt compound of claim 1, wherein:
the antioxidant is any one of an antioxidant 445, an antioxidant RD, an antioxidant 4020, an antioxidant 4010 and an antioxidant 2020 NA.
6. The flame retardant, high temperature resistant synchronous belt compound of claim 1, wherein:
The cross-linking agent is a peroxide cross-linking agent, and the peroxide cross-linking agent is any one of DCP, BIBP, double 25 and BPO.
7. The flame retardant, high temperature resistant synchronous belt compound of claim 1, wherein:
the auxiliary cross-linking agent is any one of TAIC, TAC, TMP.
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| CN101555335A (en) * | 2008-04-11 | 2009-10-14 | 北京化工大学 | Micron-nano short-fiber rubber composite material for automobile driving belt and method for preparing same |
Non-Patent Citations (2)
| Title |
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| HNBR与EVM的并用研究;申迎军 等;特种橡胶制品;第30卷(第5期);19-22 * |
| 申迎军 等.HNBR与EVM的并用研究.特种橡胶制品.2009,第30卷(第5期),19-22. * |
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