CN104356447A - Environment-friendly modified natural rubber material applied to cable insulation layer - Google Patents
Environment-friendly modified natural rubber material applied to cable insulation layer Download PDFInfo
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- CN104356447A CN104356447A CN201410681334.XA CN201410681334A CN104356447A CN 104356447 A CN104356447 A CN 104356447A CN 201410681334 A CN201410681334 A CN 201410681334A CN 104356447 A CN104356447 A CN 104356447A
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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
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/28—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances natural or synthetic rubbers
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- 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
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- C08K2201/011—Nanostructured additives
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- 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
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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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
- 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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- 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
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
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Abstract
The invention discloses an environment-friendly modified natural rubber material applied to a cable insulation layer. The environment-friendly modified natural rubber material comprises the following raw materials in parts by weight: 60-80 parts of rare earth cis-polybutadiene rubber, 30-40 parts of modified natural rubber, 3-4 parts of a vulcanization system, 5-10 parts of mica powder, 20-30 parts of a lignin reinforcing agent, 30-40 parts of white carbon black, 20-30 parts of silane modified sepiolite, 2-3 parts of nano calcium carbonate, 1.5-1.8 parts of silicone oil, 1-2 parts of naphthenic oil, 40-50 parts of carbon black N330 and 5-6 parts of N-methylene carboxyl-2-benzothiazolyl sulfenamide, wherein the vulcanization system comprises the following components in parts by weight: 0.5-1 part of N-N'-meta-phenylene bismaleimide, 2-3 parts of sulphur, 0.5-1 part of a vulcanization accelerator DPTT, 0.5-1 part of a vulcanization accelerator TMTM and 1-2 parts of a vulcanization accelerator TMTD. The environment-friendly modified natural rubber material is environment-friendly, small in pollution, high in mechanical performance and high in ageing-resistant performance.
Description
Technical field
The present invention relates to cable sheath technical field, particularly relate to a kind of cable insulation environment protection modification natural rubber material.
Background technology
China's natural rubber resource is very abundant; its elasticity is large, and electrical insulation capability is excellent, wear resistance and drought tolerance good; china natural resources is relatively deficient, and the Appropriate application natural rubber situation of alleviating china natural resources scarcity is to develop the economy and protection of the environment has extremely important effect.The development that current natural rubber strengthens the performance of wire cable insulating layer is more and more rapider, there is huge economic potential, but natural rubber is easy to aging, mechanical property does not reach requirement, and the discarded wire cable insulating layer of preparation buries rear easy contaminate environment, the study on the modification of current natural rubber more and more receives the concern of people.
Summary of the invention
The present invention proposes a kind of cable insulation environment protection modification natural rubber material, environmental protection, environmental pollution is little, and mechanical property is good, and ageing-resistant performance is good.
A kind of cable insulation environment protection modification natural rubber material that the present invention proposes, its raw material comprises by weight: rare earth polybutadiene rubber 60-80 part, modified natural rubber 30-40 part, vulcanization system 3-4 part, mica powder 5-10 part, lignin reinforcing agent 20-30 part, white carbon black 30-40 part, silane-modified sepiolite 20-30 part, nano-calcium carbonate 2-3 part, silicone oil 1.5-1.8 part, naphthenic oil 1-2 part, carbon black N330 40-50 part, N-methylene radical carboxyl-2-[4-morpholinodithio sulphenamide 5-6 part;
Vulcanization system is composed of the following components by weight: N, N '-penylene bismaleimides 0.5-1 part, sulphur 2-3 part, accelerator D PTT 0.5-1 part, vulcanization accelerator TMTM 0.5-1 part, vulcanization accelerator TMTD 1-2 part;
Wherein modified natural rubber adopts following technique to prepare: by weight by 0.2-0.5 part Resorcinol, 0.2-0.8 part formaldehyde, 10-15 part water and 18-22 part carboxylic styrene-butadiene rubber mix, then to add massfraction be the pH value of the material that 8.5-9% sodium hydroxide solution makes to obtain is 8-8.1, 25-28 part nylon short fibre is added after leaving standstill 2-4h, 17-19 part carboxylic styrene-butadiene rubber, 1-3 part dispersion agent stirs, stirring velocity is 180-220r/min, then 1.5-1.8 part wollastonite powder is added, 1-1.5 part carbon black stirs 1-2min, stirring velocity is 130-150r/min, then ramp-up rate is to 2500-2700r/min, stir 3-4min, the material obtained is put into baking oven dry, oven temperature is 80-85 DEG C, drying time is 2-3h, then raised temperature is heat-treated to 180-185 DEG C, heat treatment time is 6-7min, the material obtained is sent in Banbury mixer, adding 4-6 part resol plasticates evenly, then 50-60 part methyl methacrylate natural rubber is added evenly mixing, and then it is evenly mixing to add 5-6.5 part layered silicate, twice melting temperature is 65-70 DEG C, obtain modified natural rubber, in nylon short fibre, length is that the nylon short fibre of 0.5-1mm accounts for 55-75wt%, and length is that the nylon short fibre of 1-1.5mm accounts for 25-45wt%.
Preferably, its raw material comprises by weight: rare earth polybutadiene rubber 70-75 part, modified natural rubber 35-38 part, vulcanization system 3.5-3.8 part, mica powder 6-8 part, lignin reinforcing agent 25-28 part, white carbon black 34-36 part, silane-modified sepiolite 23-25 part, nano-calcium carbonate 2.3-2.5 part, silicone oil 1.6-1.7 part, naphthenic oil 1.5-1.7 part, carbon black N330 42-45 part, N-methylene radical carboxyl-2-[4-morpholinodithio sulphenamide 5.5-5.8 part.
Preferably, its raw material comprises by weight: rare earth polybutadiene rubber 73 parts, modified natural rubber 37 parts, vulcanization system 3.7 parts, mica powder 6.4 parts, lignin reinforcing agent 27 parts, white carbon black 35 parts, silane-modified sepiolite 24 parts, nano-calcium carbonate 2.4 parts, silicone oil 1.62 parts, naphthenic oil 1.7 parts, carbon black N330 43 parts, N-methylene radical carboxyl-2-[4-morpholinodithio sulphenamide 5.6 parts.
Preferably, vulcanization system is composed of the following components by weight: N, N '-penylene bismaleimides 0.6-0.8 part, sulphur 2.5-2.8 part, accelerator D PTT 0.6-0.8 part, vulcanization accelerator TMTM 0.8-1 part, vulcanization accelerator TMTD 1.2-1.5 part.
Preferably, modified natural rubber adopts following technique to prepare: by weight by 0.3-0.4 part Resorcinol, 0.4-0.6 part formaldehyde, 12-13 part water and 20-21 part carboxylic styrene-butadiene rubber mix, then to add massfraction be the pH value of the material that 8.6-8.8% sodium hydroxide solution makes to obtain is 8-8.1, 26-27 part nylon short fibre is added after leaving standstill 3-4h, 18-19 part carboxylic styrene-butadiene rubber, 1-2 part dispersion agent stirs, stirring velocity is 200-210r/min, then 1.6-1.7 part wollastonite powder is added, 1.2-1.3 part carbon black stirs 1.5-2min, stirring velocity is 140-145r/min, then ramp-up rate is to 2600-2750r/min, stir 3-3.5min, the material obtained is put into baking oven dry, oven temperature is 80-82 DEG C, drying time is 2.5-3h, then raised temperature is heat-treated to 182-184 DEG C, heat treatment time is 6-7min, the material obtained is sent in Banbury mixer, adding 5-6 part resol plasticates evenly, then 55-58 part methyl methacrylate natural rubber is added evenly mixing, and then it is evenly mixing to add 6-6.3 part layered silicate, twice melting temperature is 67-69 DEG C, obtain modified natural rubber, in nylon short fibre, length is that the nylon short fibre of 0.5-1mm accounts for 60-70wt%, and length is that the nylon short fibre of 1-1.5mm accounts for 30-40wt%.
In the present invention, rare earth polybutadiene rubber has higher tensile strength, lower hysteresis loss and heat build-up, there is excellent anti-flexural property, better wet-sliding resistant performance, add appropriate lignin reinforcing agent, its can with rare earth polybutadiene rubber, modified natural rubber reaches the infiltration of molecular level and is cross-linked, its addition is high, significantly can reduce production cost, and environmental protection, free from environmental pollution, sepiolite is silicon oxide and magnesian hydrate, silane-modified sepiolite reinforcing property is excellent, and price is low, can significantly reduce costs, mica powder, lignin reinforcing agent, white carbon black, silane-modified sepiolite, inorganic mineral after nano-calcium carbonate burning can return the earth, free from environmental pollution, and bury rear easy degraded, in the preparation process of modified natural rubber, carboxylic styrene-butadiene rubber is wherein active large, when reacting with nylon short fibre, not only with can stick to staple fibre surface, covulcanization effect can be produced again with methyl methacrylate natural rubber, interfacial adhesion performance is good, good mechanical performance, nylon short fibre surface is after carboxylic styrene-butadiene rubber process, the surface of nylon short fibre is more coarse, can with methyl methacrylate natural rubber mechanical bond, mechanical property strengthens further.In the present invention, the environmental protection of above-mentioned modification compound cable sheath material, environmental pollution is little, and mechanical property is good, and ageing-resistant performance is good.
Embodiment
Embodiment 1
A kind of cable insulation environment protection modification natural rubber material, its raw material comprises by weight: rare earth polybutadiene rubber 60 parts, modified natural rubber 40 parts, vulcanization system 3 parts, mica powder 10 parts, lignin reinforcing agent 20 parts, white carbon black 40 parts, silane-modified sepiolite 20 parts, nano-calcium carbonate 3 parts, silicone oil 1.5 parts, naphthenic oil 2 parts, carbon black N330 40 parts, N-methylene radical carboxyl-2-[4-morpholinodithio sulphenamide 6 parts, vulcanization system is composed of the following components by weight: N, N '-penylene bismaleimides 0.5 part, 3 parts, sulphur, accelerator D PTT 0.5 part, vulcanization accelerator TMTM 1 part, vulcanization accelerator TMTD 1 part, wherein modified natural rubber adopts following technique to prepare: by weight by 0.5 part of Resorcinol, 0.2 part of formaldehyde, 15 parts of water and 18 parts of carboxylic styrene-butadiene rubbers mix, then to add massfraction be the pH value of the material that 8.5% sodium hydroxide solution makes to obtain is 8.1, 28 parts of nylon short fibres are added after leaving standstill 2h, 17 parts of carboxylic styrene-butadiene rubbers, 3 parts of dispersion agents stir, stirring velocity is 180r/min, then 1.8 parts of wollastonite powder are added, 1 part of carbon black stirs 2min, stirring velocity is 130r/min, then ramp-up rate is to 2700r/min, stir 3min, the material obtained is put into baking oven dry, oven temperature is 85 DEG C, drying time is 2h, then raised temperature to 185 DEG C is heat-treated, heat treatment time is 6min, the material obtained is sent in Banbury mixer, adding 6 parts of resol plasticates evenly, then 50 parts of methyl methacrylate natural rubbers are added evenly mixing, and then it is evenly mixing to add 6.5 parts of layered silicates, twice melting temperature is 65 DEG C, obtain modified natural rubber, in nylon short fibre, length is that the nylon short fibre of 0.5-1mm accounts for 75wt%, and length is that the nylon short fibre of 1-1.5mm accounts for 25wt%.
Embodiment 2
A kind of cable insulation environment protection modification natural rubber material, its raw material comprises by weight: rare earth polybutadiene rubber 80 parts, modified natural rubber 30 parts, vulcanization system 4 parts, mica powder 5 parts, lignin reinforcing agent 30 parts, white carbon black 30 parts, silane-modified sepiolite 30 parts, nano-calcium carbonate 2 parts, silicone oil 1.8 parts, naphthenic oil 1 part, carbon black N330 50 parts, N-methylene radical carboxyl-2-[4-morpholinodithio sulphenamide 5 parts, vulcanization system is composed of the following components by weight: N, N '-penylene bismaleimides 1 part, 2 parts, sulphur, accelerator D PTT 1 part, vulcanization accelerator TMTM 0.5 part, vulcanization accelerator TMTD 2 parts, wherein modified natural rubber adopts following technique to prepare: by weight by 0.2 part of Resorcinol, 0.8 part of formaldehyde, 10 parts of water and 22 parts of carboxylic styrene-butadiene rubbers mix, then to add massfraction be the pH value of the material that 9% sodium hydroxide solution makes to obtain is 8, 25 parts of nylon short fibres are added after leaving standstill 4h, 19 parts of carboxylic styrene-butadiene rubbers, 1 part of dispersion agent stirs, stirring velocity is 220r/min, then 1.5 parts of wollastonite powder are added, 1.5 parts of carbon blacks stir 1min, stirring velocity is 150r/min, then ramp-up rate is to 2500r/min, stir 4min, the material obtained is put into baking oven dry, oven temperature is 80 DEG C, drying time is 3h, then raised temperature to 180 DEG C is heat-treated, heat treatment time is 7min, the material obtained is sent in Banbury mixer, adding 4 parts of resol plasticates evenly, then 60 parts of methyl methacrylate natural rubbers are added evenly mixing, and then it is evenly mixing to add 5 parts of layered silicates, twice melting temperature is 70 DEG C, obtain modified natural rubber, in nylon short fibre, length is that the nylon short fibre of 0.5-1mm accounts for 55wt%, and length is that the nylon short fibre of 1-1.5mm accounts for 45wt%.
Embodiment 3
A kind of cable insulation environment protection modification natural rubber material, its raw material comprises by weight: rare earth polybutadiene rubber 73 parts, modified natural rubber 37 parts, vulcanization system 3.7 parts, mica powder 6.4 parts, lignin reinforcing agent 27 parts, white carbon black 35 parts, silane-modified sepiolite 24 parts, nano-calcium carbonate 2.4 parts, silicone oil 1.62 parts, naphthenic oil 1.7 parts, carbon black N330 43 parts, N-methylene radical carboxyl-2-[4-morpholinodithio sulphenamide 5.6 parts, vulcanization system is composed of the following components by weight: N, N '-penylene bismaleimides 0.74 part, 2.6 parts, sulphur, accelerator D PTT 0.75 part, vulcanization accelerator TMTM 0.9 part, vulcanization accelerator TMTD 1.4 parts, wherein modified natural rubber adopts following technique to prepare: by weight by 0.35 part of Resorcinol, 0.5 part of formaldehyde, 12.5 parts of water and 20.5 parts of carboxylic styrene-butadiene rubbers mix, then to add massfraction be the pH value of the material that 8.7% sodium hydroxide solution makes to obtain is 8.05, 26.2 parts of nylon short fibres are added after leaving standstill 3.5h, 18.4 part carboxylic styrene-butadiene rubber, 1.4 parts of dispersion agents stir, stirring velocity is 205r/min, then 1.64 parts of wollastonite powder are added, 1.25 parts of carbon blacks stir 1.8min, stirring velocity is 142r/min, then ramp-up rate is to 2650r/min, stir 3.5min, the material obtained is put into baking oven dry, oven temperature is 81 DEG C, drying time is 2.5h, then raised temperature to 183 DEG C is heat-treated, heat treatment time is 6min, the material obtained is sent in Banbury mixer, adding 6 parts of resol plasticates evenly, then 57 parts of methyl methacrylate natural rubbers are added evenly mixing, and then it is evenly mixing to add 6.2 parts of layered silicates, twice melting temperature is 68 DEG C, obtain modified natural rubber, in nylon short fibre, length is that the nylon short fibre of 0.5-1mm accounts for 65wt%, and length is that the nylon short fibre of 1-1.5mm accounts for 35wt%.
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (5)
1. a cable insulation environment protection modification natural rubber material, is characterized in that, its raw material comprises by weight: rare earth polybutadiene rubber 60-80 part, modified natural rubber 30-40 part, vulcanization system 3-4 part, mica powder 5-10 part, lignin reinforcing agent 20-30 part, white carbon black 30-40 part, silane-modified sepiolite 20-30 part, nano-calcium carbonate 2-3 part, silicone oil 1.5-1.8 part, naphthenic oil 1-2 part, carbon black N330 40-50 part, N-methylene radical carboxyl-2-[4-morpholinodithio sulphenamide 5-6 part;
Vulcanization system is composed of the following components by weight: N, N '-penylene bismaleimides 0.5-1 part, sulphur 2-3 part, accelerator D PTT 0.5-1 part, vulcanization accelerator TMTM 0.5-1 part, vulcanization accelerator TMTD 1-2 part;
Wherein modified natural rubber adopts following technique to prepare: by weight by 0.2-0.5 part Resorcinol, 0.2-0.8 part formaldehyde, 10-15 part water and 18-22 part carboxylic styrene-butadiene rubber mix, then to add massfraction be the pH value of the material that 8.5-9% sodium hydroxide solution makes to obtain is 8-8.1, 25-28 part nylon short fibre is added after leaving standstill 2-4h, 17-19 part carboxylic styrene-butadiene rubber, 1-3 part dispersion agent stirs, stirring velocity is 180-220r/min, then 1.5-1.8 part wollastonite powder is added, 1-1.5 part carbon black stirs 1-2min, stirring velocity is 130-150r/min, then ramp-up rate is to 2500-2700r/min, stir 3-4min, the material obtained is put into baking oven dry, oven temperature is 80-85 DEG C, drying time is 2-3h, then raised temperature is heat-treated to 180-185 DEG C, heat treatment time is 6-7min, the material obtained is sent in Banbury mixer, adding 4-6 part resol plasticates evenly, then 50-60 part methyl methacrylate natural rubber is added evenly mixing, and then it is evenly mixing to add 5-6.5 part layered silicate, twice melting temperature is 65-70 DEG C, obtain modified natural rubber, in nylon short fibre, length is that the nylon short fibre of 0.5-1mm accounts for 55-75wt%, and length is that the nylon short fibre of 1-1.5mm accounts for 25-45wt%.
2. cable insulation environment protection modification natural rubber material according to claim 1, it is characterized in that, its raw material comprises by weight: rare earth polybutadiene rubber 70-75 part, modified natural rubber 35-38 part, vulcanization system 3.5-3.8 part, mica powder 6-8 part, lignin reinforcing agent 25-28 part, white carbon black 34-36 part, silane-modified sepiolite 23-25 part, nano-calcium carbonate 2.3-2.5 part, silicone oil 1.6-1.7 part, naphthenic oil 1.5-1.7 part, carbon black N330 42-45 part, N-methylene radical carboxyl-2-[4-morpholinodithio sulphenamide 5.5-5.8 part.
3. cable insulation environment protection modification natural rubber material according to claim 2, it is characterized in that, its raw material comprises by weight: rare earth polybutadiene rubber 73 parts, modified natural rubber 37 parts, vulcanization system 3.7 parts, mica powder 6.4 parts, lignin reinforcing agent 27 parts, white carbon black 35 parts, silane-modified sepiolite 24 parts, nano-calcium carbonate 2.4 parts, silicone oil 1.62 parts, naphthenic oil 1.7 parts, carbon black N330 43 parts, N-methylene radical carboxyl-2-[4-morpholinodithio sulphenamide 5.6 parts.
4. cable insulation environment protection modification natural rubber material according to claim 1, it is characterized in that, vulcanization system is composed of the following components by weight: N, N '-penylene bismaleimides 0.6-0.8 part, sulphur 2.5-2.8 part, accelerator D PTT 0.6-0.8 part, vulcanization accelerator TMTM 0.8-1 part, vulcanization accelerator TMTD 1.2-1.5 part.
5. cable insulation environment protection modification natural rubber material according to claim 1, it is characterized in that, modified natural rubber adopts following technique to prepare: by weight by 0.3-0.4 part Resorcinol, 0.4-0.6 part formaldehyde, 12-13 part water and 20-21 part carboxylic styrene-butadiene rubber mix, then to add massfraction be the pH value of the material that 8.6-8.8% sodium hydroxide solution makes to obtain is 8-8.1, 26-27 part nylon short fibre is added after leaving standstill 3-4h, 18-19 part carboxylic styrene-butadiene rubber, 1-2 part dispersion agent stirs, stirring velocity is 200-210r/min, then 1.6-1.7 part wollastonite powder is added, 1.2-1.3 part carbon black stirs 1.5-2min, stirring velocity is 140-145r/min, then ramp-up rate is to 2600-2750r/min, stir 3-3.5min, the material obtained is put into baking oven dry, oven temperature is 80-82 DEG C, drying time is 2.5-3h, then raised temperature is heat-treated to 182-184 DEG C, heat treatment time is 6-7min, the material obtained is sent in Banbury mixer, adding 5-6 part resol plasticates evenly, then 55-58 part methyl methacrylate natural rubber is added evenly mixing, and then it is evenly mixing to add 6-6.3 part layered silicate, twice melting temperature is 67-69 DEG C, obtain modified natural rubber, in nylon short fibre, length is that the nylon short fibre of 0.5-1mm accounts for 60-70wt%, and length is that the nylon short fibre of 1-1.5mm accounts for 30-40wt%.
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| CN104774350A (en) * | 2015-04-21 | 2015-07-15 | 南京东亚橡塑制品有限公司 | High-slip-resistance anti-wear rubber sheet and preparation method thereof |
| CN105440364A (en) * | 2015-12-09 | 2016-03-30 | 白银有色集团股份有限公司 | Anti-oxidation natural butadiene styrene insulating material taking HVA-2 as vulcanizing agent |
| CN105418992A (en) * | 2015-12-15 | 2016-03-23 | 宁国天运橡塑制品有限公司 | Rubber sleeve for bushing of automobile steering device |
| CN105524304A (en) * | 2015-12-15 | 2016-04-27 | 宁国天运橡塑制品有限公司 | Wear-resistant ageing-resistant rubber sleeve for automotive steering gear bushing |
| CN105885128A (en) * | 2016-06-20 | 2016-08-24 | 李文军 | Cable insulating material for ocean vessel and preparation method of cable insulating material |
| CN111763360A (en) * | 2019-04-02 | 2020-10-13 | 中国石油化工股份有限公司 | Rubber composition, vulcanized rubber, and preparation method and application thereof |
| CN113345634A (en) * | 2021-01-26 | 2021-09-03 | 陈跃超 | Special cable for brick machine |
| CN113345634B (en) * | 2021-01-26 | 2023-03-31 | 陈跃超 | Special cable for brick machine |
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Application publication date: 20150218 |