CN112679810A - Rubber compound for diamond wire saw, preparation method and diamond wire saw - Google Patents
Rubber compound for diamond wire saw, preparation method and diamond wire saw Download PDFInfo
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- CN112679810A CN112679810A CN202011479144.1A CN202011479144A CN112679810A CN 112679810 A CN112679810 A CN 112679810A CN 202011479144 A CN202011479144 A CN 202011479144A CN 112679810 A CN112679810 A CN 112679810A
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- rubber
- carbon black
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 124
- 239000005060 rubber Substances 0.000 title claims abstract description 124
- 150000001875 compounds Chemical class 0.000 title claims abstract description 52
- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 51
- 239000010432 diamond Substances 0.000 title claims abstract description 51
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000006229 carbon black Substances 0.000 claims abstract description 43
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 239000002318 adhesion promoter Substances 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 10
- 239000013543 active substance Substances 0.000 claims abstract description 10
- 239000010959 steel Substances 0.000 claims abstract description 10
- 238000012545 processing Methods 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 48
- 238000002156 mixing Methods 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 19
- 238000007599 discharging Methods 0.000 claims description 18
- 239000011324 bead Substances 0.000 claims description 16
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 14
- 229920005989 resin Polymers 0.000 claims description 14
- 239000011347 resin Substances 0.000 claims description 14
- 238000007664 blowing Methods 0.000 claims description 9
- 239000003921 oil Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000011787 zinc oxide Substances 0.000 claims description 7
- 235000021355 Stearic acid Nutrition 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 6
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 6
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 6
- 239000008117 stearic acid Substances 0.000 claims description 6
- DGXAGETVRDOQFP-UHFFFAOYSA-N 2,6-dihydroxybenzaldehyde Chemical compound OC1=CC=CC(O)=C1C=O DGXAGETVRDOQFP-UHFFFAOYSA-N 0.000 claims description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 5
- FMRLDPWIRHBCCC-UHFFFAOYSA-L Zinc carbonate Chemical compound [Zn+2].[O-]C([O-])=O FMRLDPWIRHBCCC-UHFFFAOYSA-L 0.000 claims description 5
- SCABKEBYDRTODC-UHFFFAOYSA-N bis[2-(2-butoxyethoxy)ethyl] hexanedioate Chemical compound CCCCOCCOCCOC(=O)CCCCC(=O)OCCOCCOCCCC SCABKEBYDRTODC-UHFFFAOYSA-N 0.000 claims description 5
- 229910017052 cobalt Inorganic materials 0.000 claims description 5
- 239000010941 cobalt Substances 0.000 claims description 5
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 5
- 239000000395 magnesium oxide Substances 0.000 claims description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 5
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 5
- STSDHUBQQWBRBH-UHFFFAOYSA-N n-cyclohexyl-1,3-benzothiazole-2-sulfonamide Chemical compound N=1C2=CC=CC=C2SC=1S(=O)(=O)NC1CCCCC1 STSDHUBQQWBRBH-UHFFFAOYSA-N 0.000 claims description 5
- 238000004513 sizing Methods 0.000 claims description 5
- 239000011667 zinc carbonate Substances 0.000 claims description 5
- 229910000010 zinc carbonate Inorganic materials 0.000 claims description 5
- 235000004416 zinc carbonate Nutrition 0.000 claims description 5
- ZNRLMGFXSPUZNR-UHFFFAOYSA-N 2,2,4-trimethyl-1h-quinoline Chemical compound C1=CC=C2C(C)=CC(C)(C)NC2=C1 ZNRLMGFXSPUZNR-UHFFFAOYSA-N 0.000 claims description 4
- 230000003712 anti-aging effect Effects 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 239000003963 antioxidant agent Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 150000001868 cobalt Chemical class 0.000 claims description 3
- JYXJUIJEYIELLT-UHFFFAOYSA-N 2-(2,6-dihydroxyphenyl)acetaldehyde Chemical compound OC1=CC=CC(O)=C1CC=O JYXJUIJEYIELLT-UHFFFAOYSA-N 0.000 claims description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical group [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 2
- ZZMVLMVFYMGSMY-UHFFFAOYSA-N 4-n-(4-methylpentan-2-yl)-1-n-phenylbenzene-1,4-diamine Chemical group C1=CC(NC(C)CC(C)C)=CC=C1NC1=CC=CC=C1 ZZMVLMVFYMGSMY-UHFFFAOYSA-N 0.000 claims description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 2
- 229920000877 Melamine resin Polymers 0.000 claims description 2
- 239000004640 Melamine resin Substances 0.000 claims description 2
- YGCOKJWKWLYHTG-UHFFFAOYSA-N [[4,6-bis[bis(hydroxymethyl)amino]-1,3,5-triazin-2-yl]-(hydroxymethyl)amino]methanol Chemical class OCN(CO)C1=NC(N(CO)CO)=NC(N(CO)CO)=N1 YGCOKJWKWLYHTG-UHFFFAOYSA-N 0.000 claims description 2
- 230000003078 antioxidant effect Effects 0.000 claims description 2
- GEMHFKXPOCTAIP-UHFFFAOYSA-N n,n-dimethyl-n'-phenylcarbamimidoyl chloride Chemical compound CN(C)C(Cl)=NC1=CC=CC=C1 GEMHFKXPOCTAIP-UHFFFAOYSA-N 0.000 claims description 2
- HNWAHFPYJHAAJE-UHFFFAOYSA-N n-tert-butyl-1,3-benzothiazole-2-sulfonamide Chemical compound C1=CC=C2SC(S(=O)(=O)NC(C)(C)C)=NC2=C1 HNWAHFPYJHAAJE-UHFFFAOYSA-N 0.000 claims description 2
- 150000002978 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
- 229920000642 polymer Polymers 0.000 claims description 2
- BNCADMBVWNPPIZ-UHFFFAOYSA-N 2-n,2-n,4-n,4-n,6-n,6-n-hexakis(methoxymethyl)-1,3,5-triazine-2,4,6-triamine Chemical compound COCN(COC)C1=NC(N(COC)COC)=NC(N(COC)COC)=N1 BNCADMBVWNPPIZ-UHFFFAOYSA-N 0.000 claims 2
- 239000005864 Sulphur Substances 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 claims 2
- 239000010734 process oil Substances 0.000 claims 1
- 238000005336 cracking Methods 0.000 abstract description 5
- 238000004132 cross linking Methods 0.000 abstract description 5
- 238000004073 vulcanization Methods 0.000 abstract description 4
- 239000000853 adhesive Substances 0.000 description 6
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- 230000000052 comparative effect Effects 0.000 description 4
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- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
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- 238000012360 testing method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 101100478969 Oryza sativa subsp. japonica SUS2 gene Proteins 0.000 description 1
- 101100004663 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) BRR2 gene Proteins 0.000 description 1
- 101100504519 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) GLE1 gene Proteins 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- 239000004579 marble Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
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- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention provides a rubber compound for a diamond wire saw, a preparation method and the diamond wire saw, wherein the rubber compound comprises the following components: 100 parts of nitrile butadiene rubber, 30-60 parts of white carbon black, 15-40 parts of carbon black, 5-38 parts of processing oil, 8-12 parts of an active agent, 1.8-6 parts of an adhesion promoter, 1.0-2 parts of a vulcanizing agent, 0.8-1.6 parts of a tackifier and 0.8-2 parts of an accelerator. The rubber formed after vulcanization and crosslinking of the rubber compound disclosed by the invention is good in heat resistance, high in elongation, strong in adhesion with a steel wire rope and high in flex cracking resistance.
Description
Technical Field
The invention belongs to the technical field of rubber, and particularly relates to a rubber compound for a diamond wire saw, a preparation method of the rubber compound and the diamond wire saw.
Background
The diamond rope saw is one kind of diamond tool, can be widely used for cutting buildings such as houses, bridges, large-scale piers, cement pipelines and the like, can also be used for mining and cutting stones such as marble, granite, sandstone and the like, and has the advantages of flexible construction operation, simple structure, low noise, easy assembly and disassembly and the like.
Diamond wire saws typically include a wire rope, diamond beads, and rubber. The diamond wire saw generates large heat when cutting reinforced concrete, and the wire saw has large bending curvature, so the used rubber has higher requirements on heat resistance, elongation, adhesive force with steel wires and flex crack resistance. At present, natural rubber is used for a diamond wire saw for cutting reinforced concrete, the heat resistance of the diamond wire saw is relatively poor, the hardness of a sizing material is improved by adjusting a formula, the adhesive force between diamond beads and a steel wire rope is further improved, the elongation of the sizing material is small, the flex crack resistance is poor, the diamond wire saw is easy to age too early in the using process of the diamond wire saw, the beads are prone to water entering and rotating or the steel wire rope is prone to break due to rubber cracking, potential safety hazards exist in the diamond wire saw, and the service life of the diamond wire saw is short.
Disclosure of Invention
Therefore, the invention aims to provide the rubber compound for the diamond wire saw, the preparation method and the diamond wire saw aiming at the defects in the prior art.
The purpose of the invention is realized by the following technical scheme.
2. In one aspect, the present invention provides a mix for a diamond wire saw, wherein the mix comprises: 100 parts of nitrile butadiene rubber, 30-60 parts of white carbon black, 15-40 parts of carbon black, 5-38 parts of processing oil, 8-12 parts of an active agent, 1.8-6 parts of an adhesion promoter, 1.0-2 parts of a vulcanizing agent, 0.8-1.6 parts of a tackifier and 0.8-2 parts of an accelerator.
The nitrile rubber with better heat resistance is adopted in the rubber compound, and the nitrile rubber-based rubber for the diamond wire saw formed after vulcanization and crosslinking has improved water resistance and adhesive force with a steel wire rope. According to the invention, a specific amount of white carbon black and carbon black are added into the rubber compound as a filler, so that the elongation and the flex crack resistance of the nitrile rubber-based rubber for the diamond wire saw are obviously improved. In addition, by adding other components such as processing oil and adhesion promoter into the rubber compound, the heat resistance and the adhesive force of the nitrile rubber-based rubber for the diamond wire saw can be further improved, the performance of the nitrile rubber-based rubber for the diamond wire saw is optimized, and the service life of the diamond wire saw is further prolonged.
According to the rubber compound provided by the invention, the acrylonitrile content in the nitrile rubber suitable for the invention is 30-40 wt%. Nitrile rubbers are commercially available, for example, from the company nipponica under the trade names DN3335, DN3350 and DN 3380.
According to the rubber compound provided by the invention, the weight ratio of the white carbon black to the carbon black is 1-2: 1, and preferably 1.5-2: 1. Within the range of the proportion of the white carbon black and the carbon black, under the condition that the total amount of the white carbon black and the carbon black is constant, the mixed rubber (the rubber for the diamond wire saw based on the nitrile rubber) has higher elongation and flexural cracking resistance.
According to the rubber compound provided by the invention, the particle size of the white carbon black is 40-50 mu m, and the particle size of the carbon black is 20-25 nm. According to the invention, the white carbon black is used as a main filler, the carbon black is used as an auxiliary filler, the elongation and the flex crack resistance of the nitrile rubber-based rubber for the diamond wire saw are improved by combining the white carbon black and the auxiliary filler, and the nitrile rubber-based rubber is easy to mix with a sizing material.
In some embodiments, the white carbon black is precipitated white carbon black and the carbon black is medium ultra-wear carbon black. For example, precipitated silica (45 microns) available from degussa materials ltd under the trade name 255; medium ultra abrasion carbon black available from Kabot carbon Black, Inc. under the trade name N234 (average primary particle size 23. + -.2 nm).
According to the invention, a rubber compound is provided, wherein the processing oil is DOP, DOA or bis (butoxyethoxyethyl) adipate (TP-95). In some preferred embodiments, the processing oil is bis (butoxyethoxyethyl) adipate, which can improve the heat resistance of the compound (nitrile rubber-based rubber for diamond wire saws).
According to the invention, the mixed rubber is provided, wherein the active agent comprises stearic acid and one or more selected from zinc oxide, zinc carbonate and magnesium oxide. In some embodiments, the active agents are indirect zinc oxide and stearic acid.
In the present invention, the ratio of the sum of the total amount of zinc oxide, zinc carbonate and/or magnesium oxide contained in the activator to the amount of stearic acid may be 6 to 15: 1. Within this range, zinc oxide, zinc carbonate and/or magnesium oxide also have a filling effect, and the high-temperature resistance of the rubber compound can be improved.
According to the invention, the mixed rubber is provided, wherein the adhesion promoter is one or both of a resin adhesive and a cobalt salt adhesive. Examples of resin binders suitable for use in the present invention include, but are not limited to: resorcinol-acetaldehyde resins and resorcinol-formaldehyde resins. Examples of cobalt salt binders suitable for use in the present invention include, but are not limited to: cobalt naphthenate and cobalt boroacylate.
In some embodiments, the adhesion promoter comprises cobalt boroacylate and resorcinol-formaldehyde resin in a weight ratio of 1 to 3: 6.
According to the invention, the vulcanizing agent is sulfur, insoluble sulfur or peroxide. In some embodiments, the vulcanizing agent is insoluble sulfur, for example, HDOT 20.
According to the rubber compound provided by the invention, the tackifier is phenolic resin, such as SP1068 tackifying resin.
According to the invention, the rubber compound is provided, wherein the accelerator is one or more of 2-N-cyclohexyl-2-benzothiazole sulfonamide (CZ), N-tert-butyl-benzothiazole sulfonamide, N-cyclohexyl-2-benzothiazole sulfonamide and methylated hexamethylol melamine resin (HMMM). In some embodiments, the promoter is CZ and HMMM, preferably in a weight ratio of 1-2: 3.
The rubber compound provided by the invention further comprises 1.8-4 parts by weight of an anti-aging agent. Examples of antioxidants suitable for use in the present invention include, but are not limited to: n- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine (6PPD) and 2,2, 4-trimethyl-1, 2-dihydroquinoline polymer (RD).
In another aspect, the present invention also provides a method for preparing a rubber compound for a diamond wire saw, wherein the method comprises the following steps:
(1) placing nitrile rubber, an active agent, an adhesion promoter, a tackifier and optionally an anti-aging agent into an internal mixer for mixing for 20-60 seconds, adding white carbon black and carbon black for further mixing for 45-90 seconds, adding processing oil, mixing to 110 +/-5 ℃, cleaning, mixing to 140-150 ℃, and discharging;
(2) turning over the rubber material obtained in the step (1) on an open mill to obtain a primary rubber compound;
(3) evenly dividing the primary rubber compound, sequentially mixing in an internal mixer and turning over on an open mill to obtain remixed rubber compound;
(4) and averagely equally dividing the remixed rubber compound, putting the remixed rubber compound into an internal mixer, adding a vulcanizing agent and an accelerator for mixing, and then turning over the remixed rubber compound on an open mill to obtain a target product.
The preparation method provided by the invention is characterized in that the ram pressure of the internal mixer in the step (1) is 5.0 +/-0.5 kgf/c square meter, and the rotating speed is 30-40 r/min.
According to the preparation method provided by the invention, the step (2) comprises the following steps:
(201) turning the sizing material obtained in the step (1) on an open mill for 2-5 minutes, wherein the roll spacing of the open mill is 10-12 mm, and the roll temperature is 60-80 ℃;
(202) and (3) moving the rubber material obtained in the step (201) to an open mill with a roll distance of 8-10 mm and a roll temperature of 60-80 ℃ for sheet discharging, allowing the rubber material to pass through a separant groove, adhering a separant on the surface, then blowing air to cool the rubber material to room temperature, and folding and standing for 8-24 hours.
According to the preparation method provided by the invention, the step (3) comprises the following steps:
(301) evenly dividing the primary rubber compound, putting the primary rubber compound into an internal mixer, mixing to 135-140 ℃, and discharging rubber; wherein the top bolt pressure of the internal mixer is 5.0 +/-0.5 kgf/c square meter, and the rotating speed is 30-40 r/min;
(302) turning the rubber material obtained in the step (301) on an open mill for 2-5 minutes, wherein the roll spacing of the open mill is 10-12 mm, and the roll temperature is 60-80 ℃;
(303) and (3) moving the rubber material obtained in the step (302) to an open mill with a roll distance of 8-10 mm and a roll temperature of 60-80 ℃ for sheet discharging, allowing the rubber material to pass through a separant groove, adhering a separant on the surface, then blowing air to cool the rubber material to room temperature, and folding and standing for 8-24 hours.
According to the preparation method provided by the invention, the step (4) comprises the following steps:
(401) evenly dividing the remixed rubber compound equally, putting the remixed rubber compound into an internal mixer, adding a vulcanizing agent and an accelerator, mixing to 105-110 ℃, and discharging rubber; wherein the top bolt pressure of the internal mixer is 5.0 +/-0.5 kgf/c square meter, and the rotating speed is 30-40 r/min;
(402) turning over the rubber material obtained in the step (401) on an open mill for 5-8 times, wherein the roll spacing of the open mill is 10-12 mm, and the roll temperature is 40-60 ℃;
(403) and (3) moving the rubber material obtained in the step (402) to an open mill with the roll distance of 5-6 mm and the roll temperature of 40-60 ℃ for sheet discharging, passing the rubber material through a cooling water tank, blowing air to cool the rubber material to room temperature after no release agent is adhered to the surface of the rubber material, and reeling the PE cushion film to obtain the target product.
In still another aspect, the present invention also provides a diamond wire saw, wherein the diamond wire saw includes a wire rope, a plurality of diamond beads, a plurality of springs, and a mix, the plurality of diamond beads are arranged on the wire rope, the plurality of spring strings are arranged between adjacent diamond beads, and the mix is injected between the adjacent diamond beads and wraps the wire rope and the springs.
The present invention has no special requirements for the wire rope, the diamond bead and the spring, and the wire rope, the diamond bead and the spring known in the art can be used.
The invention has the following advantages:
(1) the rubber formed by vulcanizing and crosslinking the rubber compound has good heat resistance, high elongation, strong adhesion with a steel wire rope and high flex cracking resistance.
(2) The invention adopts the preparation processes of mixing, average division and remilling, and average division and promotion, thereby ensuring that each batch of rubber material is mixed uniformly and stably.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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 protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The following raw materials used in the following examples and comparative examples are as follows:
examples 1 to 8
According to the formulation shown in Table 1, a rubber compound was prepared in the following manner.
1. Preliminary mixing
Introducing cooling water into a 1.175L internal mixer, controlling the pressure of an upper plug of the internal mixer to be 5.0 +/-0.5 kgf/c square meter at the rotating speed of 40 r/min, putting the nitrile rubber, the active agent, the adhesion promoter, the tackifier and the optional antioxidant into the internal mixer, mixing for 30 seconds, adding the white carbon black and the carbon black, mixing for 50 seconds, lifting the upper plug, injecting the processing oil, mixing to 110 ℃, cleaning, continuously mixing to 140 ℃ and discharging.
1.2, turning the rubber material obtained in the step 1.1 on a 22-inch open mill, wherein the roller distance is 10-12 mm, the roller temperature is 60-80 ℃, after 3 minutes of turning, moving the rubber material to an 18-inch open mill with the roller distance of 8-10 mm and the roller temperature of 60-80 ℃ for sheet discharging, allowing the rubber material to pass through a separant groove, adhering a separant on the surface of the rubber material, then blowing air to cool the rubber material to the room temperature, and then folding and standing for 8-24 hours to obtain a primary rubber compound.
2. Re-refining of rubber
Introducing cooling water into a 2.175L internal mixer, controlling the pressure of an upper ram of the internal mixer to be 5.0kgf/c square meter at the rotating speed of 40 revolutions per minute, evenly dividing the primary rubber compound, putting the rubber compound into the internal mixer, mixing to 135 ℃, and discharging rubber;
2.2 turning over the rubber material obtained in the step 2.1 on a 22-inch open mill for 5 minutes, wherein the roller distance is 10-12 mm, and the roller temperature is 60-80 ℃; and (3) moving the rubber material to an 18-inch open mill with the roller spacing of 8-10 mm and the roller temperature of 60-80 ℃ for sheet discharging, allowing the rubber material to pass through a separant groove, adhering a separant on the surface of the rubber material, then blowing air for cooling to room temperature, and folding and standing for 8-24 hours to obtain the remixed rubber compound.
3. Compounding rubber accelerator
Introducing cooling water into a 3.175L internal mixer, controlling the top plug pressure of the internal mixer to be 5.0kgf/c square meter and the rotating speed to be 40 r/min, evenly dividing the remixed rubber compound, adding the remixed rubber compound into the internal mixer, adding a vulcanizing agent and an accelerator, mixing to 105 ℃, and discharging;
3.2 turning over the rubber material obtained in the step 3.1 on a 22-inch open mill for 6 times, wherein the roller distance is 10-12 mm, and the roller temperature is 40-60 ℃; and then moving the rubber material to an 18-inch open mill with the roller spacing of 5-6 mm and the roller temperature of 40-60 ℃ for sheet discharging, passing the rubber material through a cooling water tank, blowing air to cool the rubber material to room temperature after no separant is adhered to the surface of the rubber material, and then coiling the rubber material by using a white PE pad film to obtain a target product for adhering the steel wire rope of the diamond rope saw.
Rubber mixes were prepared according to the above method, the formulation of which is shown in table 1.
TABLE 1 rubber mixtures of examples 1 to 8
Comparative examples 1 to 4
The rubber compound was prepared according to the methods of examples 1 to 4 using the formulations in Table 2.
TABLE 2 rubber mixtures of comparative examples 1 to 4
| Comparative example no | 1 | 2 | 3 | 4 |
| DN3350 | 0 | 0 | 100 | 100 |
| RSS1# smoked sheet glue | 100 | 100 | 0 | 0 |
| White carbon black 1 | 30 | 40 | 30 | 40 |
| White carbon black 2 | 0 | 0 | 0 | 0 |
| White carbon black 3 | 0 | 0 | 0 | 0 |
| Medium and super wear-resistant carbon black | 20 | 25 | 20 | 25 |
| KN4006 | 5 | 13 | ||
| TP-95 | 5 | 13 | ||
| Indirect zinc oxide | 10 | 10 | 10 | 10 |
| Stearic acid | 1 | 1 | 1 | 1 |
| 6PPD | 2 | 2 | 2 | 2 |
| RD | 1 | 1 | 1 | 1 |
| Cobalt boracylate | 3 | 3 | 3 | 3 |
| Resorcinol formaldehyde resin | 1 | 1 | 1 | 1 |
| SP1068 | 1.2 | 1.2 | 1.2 | 1.2 |
| HDOT2O | 1.5 | 1.5 | 1.5 | 1.5 |
| CZ | 0.6 | 0.6 | 0.6 | 0.6 |
| HMMM | 0.8 | 0.8 | 0.8 | 0.8 |
Performance testing
The Shore A hardness of the rubber after vulcanization crosslinking was measured according to GB/T531.1-2008. The tensile strength at break and the elongation at break of the rubber after vulcanization crosslinking were measured according to GB/T528-2009, where the tensile speed was 500. + -. 5 mm/min. Flex cracking was measured according to GB/T13934-2006. The bond strength (shear strength) was measured according to GB/T13936-2014. The measurement results are shown in Table 3.
TABLE 3 elastomeric compositions property testing
In addition, a trial diamond wire saw of 8m was prepared using the rubber compound of example 1, in which the diameter of the diamond string beads was 11.5mm, and cutting reinforced concrete with the diamond string beads was 3.8 square/m, and the problems of string bead breakage and wire breakage did not occur.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A mix for a diamond wire saw, wherein the mix comprises: 100 parts of nitrile butadiene rubber, 30-60 parts of white carbon black, 15-40 parts of carbon black, 5-38 parts of processing oil, 8-12 parts of an active agent, 1.8-6 parts of an adhesion promoter, 1.0-2 parts of a vulcanizing agent, 0.8-1.6 parts of a tackifier and 0.8-2 parts of an accelerator.
2. The rubber composition according to claim 1, wherein the acrylonitrile-butadiene rubber contains 30 to 40 wt.% of acrylonitrile;
preferably, the weight ratio of the white carbon black to the carbon black is 1-2: 1, preferably 1.5-2: 1;
preferably, the particle size of the white carbon black is 40-50 μm, and the particle size of the carbon black is 20-25 nm; more preferably, the white carbon black is precipitated white carbon black, and the carbon black is medium and super wear-resistant carbon black.
3. A mix as claimed in claim 1 or 2, wherein the process oil is DOP, DOA or bis (butoxyethoxyethyl) adipate;
preferably, the active agent comprises stearic acid and one or more selected from zinc oxide, zinc carbonate and magnesium oxide; more preferably, the ratio of the total amount of zinc oxide, zinc carbonate and/or magnesium oxide contained in the active agent to the amount of stearic acid is 6-15: 1.
4. A rubber mix as claimed in any one of claims 1 to 3, wherein the adhesion promoter is one or both of a resin binder, preferably a resorcinol acetaldehyde resin and/or a resorcinol formaldehyde resin, and a cobalt salt binder, preferably cobalt naphthenate and/or cobalt boroacylate;
preferably, the adhesion promoter comprises cobalt boroacylate and resorcinol-formaldehyde resin in a weight ratio of 1-3: 6.
5. A mix as claimed in any one of claims 1 to 4, wherein said vulcanizing agent is sulphur, insoluble sulphur or a peroxide, preferably HDOT 20;
preferably, the tackifier is a phenolic resin, for example, SP1068 tackifying resin;
preferably, the accelerator is one or more of 2-N-cyclohexyl-2-benzothiazole sulfonamide, N-tert-butyl-benzothiazole sulfonamide, N-cyclohexyl-2-benzothiazole sulfonamide and methylated hexamethylol melamine resin; more preferably, the accelerator is 2-N-cyclohexyl-2-benzothiazole sulfonamide and hexamethoxymethylmelamine resin, and the weight ratio of the accelerator to the hexamethoxymethylmelamine resin is preferably 1-2: 3;
preferably, the rubber compound further comprises 1.8-4 parts by weight of an anti-aging agent; more preferably, the antioxidant is N- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine (6PPD) and/or 2,2, 4-trimethyl-1, 2-dihydroquinoline polymer.
6. A method of preparing a mix as claimed in any one of claims 1 to 5, wherein said method comprises the steps of:
(1) placing nitrile rubber, an active agent, an adhesion promoter, a tackifier and optionally an anti-aging agent into an internal mixer for mixing for 20-60 seconds, adding white carbon black and carbon black for further mixing for 45-90 seconds, adding processing oil, mixing to 110 +/-5 ℃, cleaning, mixing to 140-150 ℃, and discharging;
(2) turning over the rubber material obtained in the step (1) on an open mill to obtain a primary rubber compound;
(3) evenly dividing the primary rubber compound, sequentially mixing in an internal mixer and turning over on an open mill to obtain remixed rubber compound;
(4) and averagely equally dividing the remixed rubber compound, putting the remixed rubber compound into an internal mixer, adding a vulcanizing agent and an accelerator for mixing, and then turning over the remixed rubber compound on an open mill to obtain a target product.
7. The preparation method according to claim 6, wherein the internal mixer in the step (1) has a ram pressure of 5.0 +/-0.5 kgf/c square meter and a rotation speed of 30-40 r/min;
preferably, the step (2) includes:
(201) turning the sizing material obtained in the step (1) on an open mill for 2-5 minutes, wherein the roll spacing of the open mill is 10-12 mm, and the roll temperature is 60-80 ℃;
(202) and (3) moving the rubber material obtained in the step (201) to an open mill with a roll distance of 8-10 mm and a roll temperature of 60-80 ℃ for sheet discharging, allowing the rubber material to pass through a separant groove, adhering a separant on the surface, then blowing air to cool the rubber material to room temperature, and folding and standing for 8-24 hours.
8. The production method according to claim 6 or 7, wherein the step (3) includes:
(301) evenly dividing the primary rubber compound, putting the primary rubber compound into an internal mixer, mixing to 135-140 ℃, and discharging rubber; wherein the top bolt pressure of the internal mixer is 5.0 +/-0.5 kgf/c square meter, and the rotating speed is 30-40 r/min;
(302) turning the rubber material obtained in the step (301) on an open mill for 2-5 minutes, wherein the roll spacing of the open mill is 10-12 mm, and the roll temperature is 60-80 ℃;
(303) and (3) moving the rubber material obtained in the step (302) to an open mill with a roll distance of 8-10 mm and a roll temperature of 60-80 ℃ for sheet discharging, allowing the rubber material to pass through a separant groove, adhering a separant on the surface, then blowing air to cool the rubber material to room temperature, and folding and standing for 8-24 hours.
9. The production method according to any one of claims 6 to 8, wherein the step (4) includes:
(401) evenly dividing the remixed rubber compound equally, putting the remixed rubber compound into an internal mixer, adding a vulcanizing agent and an accelerator, mixing to 105-110 ℃, and discharging rubber; wherein the top bolt pressure of the internal mixer is 5.0 +/-0.5 kgf/c square meter, and the rotating speed is 30-40 r/min;
(402) turning over the rubber material obtained in the step (401) on an open mill for 5-8 times, wherein the roll spacing of the open mill is 10-12 mm, and the roll temperature is 40-60 ℃;
(403) and (3) moving the rubber material obtained in the step (402) to an open mill with the roll distance of 5-6 mm and the roll temperature of 40-60 ℃ for sheet discharging, passing the rubber material through a cooling water tank, blowing air to cool the rubber material to room temperature after no release agent is adhered to the surface of the rubber material, and reeling the PE cushion film to obtain the target product.
10. A diamond wire saw, wherein the diamond wire saw comprises a steel wire rope, a plurality of diamond beads, a plurality of springs, and the mix of any one of claims 1 to 5, a plurality of the diamond bead strings are provided on the steel wire rope, a plurality of the spring strings are provided between adjacent diamond beads, and the mix is injected between the adjacent diamond beads and wraps the steel wire rope and the springs.
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| CN202011479144.1A CN112679810A (en) | 2020-12-15 | 2020-12-15 | Rubber compound for diamond wire saw, preparation method and diamond wire saw |
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| CN202011479144.1A CN112679810A (en) | 2020-12-15 | 2020-12-15 | Rubber compound for diamond wire saw, preparation method and diamond wire saw |
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