CN106117850A - A kind of automotive hose rubber and preparation method, automotive hose - Google Patents
A kind of automotive hose rubber and preparation method, automotive hose Download PDFInfo
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- CN106117850A CN106117850A CN201610681208.3A CN201610681208A CN106117850A CN 106117850 A CN106117850 A CN 106117850A CN 201610681208 A CN201610681208 A CN 201610681208A CN 106117850 A CN106117850 A CN 106117850A
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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
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
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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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/12—Esters; Ether-esters of cyclic polycarboxylic acids
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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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/14—Peroxides
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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
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/45—Heterocyclic compounds having sulfur in the ring
- C08K5/46—Heterocyclic compounds having sulfur in the ring with oxygen or nitrogen in the ring
- C08K5/47—Thiazoles
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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
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
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Abstract
A kind of automotive hose rubber, it is characterized in that calculating by weight, including: chlorinated polyethylene rubber 100 120 parts, reinforcing agent 40 50 parts, plasticizer 10 15 parts, vulcanizing agent 0.5 0.7 parts, accelerator 2 2.5 parts, coupling agent 2 10 parts, crosslinking coagent 1 10 parts, 0.05 2 parts of age resistor, wherein, age resistor is Hinered phenols antioxidant.Also provide for the preparation method of this automotive hose rubber a kind of, according to above-mentioned formula, controlling banburying temperature is 110 110 DEG C, put into chlorinated polyethylene rubber and reinforcing agent, plasticizer etc., it is sequentially added into age resistor, plasticizer, vulcanizing agent and accelerator etc. after it is mixing uniformly, continue the mixing sizing material obtaining having plastified, this sizing material begun to pratise on a mill until so that it is bag roller and thin logical repeatedly.Then vulcanizing sizing material on vulcanizing press, the upper and lower mould temperature arranging vulcanizing press during sulfuration is 160 170 DEG C, i.e. obtains automotive hose rubber.This rubber has stretching, tearing strength height, and ageing-resistant performance is good and its preparation method technique simple, easy to control, is suitable to industrialized production.
Description
Technical field
The present invention relates to rubber compounding and preparation field, belong to polymeric material field.
Background technology
At present, automobile industry is the most flourish, brings unprecedented to the rubber industry that auto industry is supporting
Exhibition opportunity.With " assessment of 2015-2020 Chinese automobile car load manufacturing market and the investment landscape issued according to China's Industry Information Network
Prediction address " show in June, 2015, China's automobile pollution has breached 1.63 hundred million, is only second to 2.2 hundred million of the U.S.,
Become the whole world second.China has had become as automobile consumption big country, and corresponding is that engine manufacturing technology is the most backward,
This is one of principal element hindering domestic automobile industrial development.And wherein turbocharging technology is the main skill of automobile engine
An art difficult problem, because turbine all can be greatly improved through supercharging rear engine pressure and temperature operationally, therefore, applies and is increasing
The sebific duct of pressure turbine portion needs possess higher mechanical performance, ageing-resistant performance.
But at present, it is possible to meet that the silicone rubber of these needs, fluorubber but have poor mechanical property, price is high lacks
Point, market lacks a kind of mechanical property is good and the suitable rubber of cost can be suitable for the needs of automotive hose.
Summary of the invention
The present invention proposes for solving the problems referred to above, it is provided that a kind of automotive hose rubber and preparation method thereof and by
The automotive hose that this rubber is made, the present invention provide rubber have cheap, mechanical property good, ageing-resistant performance is excellent
Advantage, can be widely used for automotive hose and related application field.
A kind of automotive hose rubber, it is characterised in that calculate by weight, including following component:
Wherein, reinforcing agent is the mixture of any one or more in white carbon black, white carbon, calcium carbonate, potter's clay,
Plasticizer is the mixture of any one or more in vaseline, naphthenic oil, paraffin oil and ester,
Vulcanizing agent is the mixture of any one or more in sulfur, organic peroxide, metal-oxide,
Accelerator is thiazole accelerator, thuriam acceserator, dithiocarbamate accelerator, aldehyde amines rush
Enter the mixing of any one or more in agent, xanthate accelerator, Thiourea accelerator, sulfenamide type accelerators
Thing,
Coupling agent is by appointing in boric acid ester coupler, aluminate coupling agent, titanate coupling agent, aluminium titanium composite coupler
Anticipate one or more mixture；
Crosslinking coagent is any one or the mixing of two kinds that N, a N '-penylene span comes in phthalimide, trithiocyanuric acid
Thing；
Age resistor is Hinered phenols antioxidant.
The automotive hose rubber that the present invention provides, it is also possible to have a feature in that wherein, the type of chlorinated polyethylene rubber
Number it is CM135B.
The present invention provide automotive hose rubber, it is also possible to have a feature in that wherein, reinforcing agent be white carbon black N550 or
White carbon black N774.
The automotive hose rubber that the present invention provides, it is also possible to having a feature in that wherein, plasticizer is phthalic acid
Dioctyl ester or phthalic acid two (2-ethyl hexyl) ester.
The automotive hose rubber that the present invention provides, it is also possible to have a feature in that wherein, vulcanizing agent is sulfur, organic
The mixture of peroxide 1:1 in mass ratio composition.
The automotive hose rubber that the present invention provides, it is also possible to having a feature in that wherein, organic peroxide is peroxide
Change diisopropylbenzene (DIPB).
The automotive hose rubber that the present invention provides, it is also possible to having a feature in that wherein, accelerator is 2-sulfydryl benzo
Thiazole or dibenzothiazyl disulfide.
The automotive hose rubber that the present invention provides, it is also possible to have a feature in that wherein, age resistor is that Hinered phenols resists
Oxygen agent AO-80,2, tri-grades of butyl-4-methylphenols of 6-, double (3,5-tri-grades of butyl-4-hydroxy phenyls) thioether, four (β-(3,5-
Three grades of butyl-4-hydroxy phenyls) propanoic acid) any one in pentaerythritol ester.
The present invention also provides for the preparation method of a kind of above-mentioned automotive hose rubber, it is characterised in that comprise the following steps:
Step one, puts into the chlorinated polyethylene rubber of proportional quantity, reinforcing agent, plasticizer enter at a temperature of 100-110 DEG C
Row is the most mixing, mixing uniformly after enter next step；
Step 2, the continuation input plasticizer of proportional quantity, vulcanizing agent, accelerator, coupling agent, crosslinking coagent, age resistor enter
Sizing material after being plastified after row secondary is mixing；
Step 3, begins to pratise the sizing material in step 2 so that it is bag roller the thinnest leading to enter next step the most afterwards；
Step 4, the upper and lower mould temperature arranging vulcanizer is that the 150-170 DEG C of sizing material obtaining step 3 vulcanizes, i.e.
Obtain automotive hose rubber.
The present invention also provides for a kind of automotive hose, it is characterised in that be made up of above-mentioned automotive hose rubber.
Invention effect and effect
The automotive hose rubber provided according to the present invention, owing to have employed novel Hinered phenols antioxidant as ageing-resistant
Agent so that the elastomeric material of preparation has higher ageing-resistant performance.
" vulcanite or thermoplastic elastomer heat are empty according to GB/T3512-2001 for the automotive hose rubber present invention provided
Gas accelerated ageing and heat resistant test " carry out heat-resistant air aging property test, recording result is, through the degradation of 72 hours
After-drawing intensity still can reach 14.21～14.77MPa, and above Mechanics Performance Testing is superior to the ginseng of national standard relevant regulations
Number, has reached the requirement of actual application.
Detailed description of the invention
For the technological means making the present invention realize, creation characteristic, reach purpose and be easy to understand with effect, below tie
Close embodiment the automotive hose rubber of the present invention and preparation method, automotive hose are specifically addressed.
In raw material used by various embodiments of the present invention in addition to the producer and specification of specified otherwise, other raw materials are commercially available,
Specification is chemical pure.
The model of the various equipment used by the present invention and the information of manufacturer are as follows:
LD-001 type compression molding instrument, Shanghai Qi Cai hydraulic machinery company limited produces；
YX-5106 type mill, PVG Rong Feng scientific instrument company limited；
ZG-3L type banbury, trace to the source rubber and plastic Science and Technology Ltd. in Changzhou；
101-1 type ageing oven, Jiangdu absolute sincerity test instrunment factory；
CMT5104 electronic tension tester, company is newly thought carefully in Shenzhen.
Embodiment 1
A kind of automotive hose rubber, calculates by weight, and its raw material composition and content are as follows:
Chlorinated polyethylene rubber (sea, Qingdao crystallization work group company) 100 parts
Reinforcing agent white carbon black N550 40 parts
Plasticizer phthalic acid two (2-ethyl hexyl) ester 10 parts
Vulcanizing agent
After having weighed raw material and the reagent of said ratio amount, the step operation according to following:
Step one, the banburying temperature controlling banbury is 110 DEG C, puts into 100 parts of chlorinations of said ratio amount toward banbury
Polyethylene rubber and 40 parts of reinforcing agents, 10 parts of plasticizers, mixing 15 minutes, enter next step the most afterwards；
Step 2, continue successively toward banbury adds 0.05 part of age resistor of said ratio amount, 0.5 part of vulcanizing agent, 2 parts
Accelerator, 2 parts of coupling agents, that 1 part of crosslinking coagent carries out secondary is mixing, the sizing material after being plastified after 30 minutes；
Step 3, begins to pratise on a mill until by the sizing material in step 2, enters after making sizing material bag roller thin logical twice
Next step；
Step 4, the upper and lower mould temperature arranging vulcanizing press is 160 DEG C, and sizing material step 3 obtained is at compression molding
Vulcanize on machine, obtain automotive hose rubber.
At room temperature according to GB/T528-2009, " vulcanite or thermoplastic elastomer draw the automotive hose rubber of the present embodiment
Stretch the mensuration of ess-strain performance " carry out hot strength test, recording hot strength is 15.91MPa；At room temperature according to GB/
T529-2008 " vulcanite or the mensuration of thermoplastic elastomer tearing strength " carries out tear resistance test, measures tearing strength and is
50.37KN/m；Carry out according to GB/T3512-2001 " vulcanite or thermoplastic elastomer hot-air accelerated ageing and heat resistant test "
Heat-resistant air aging property is tested, and recording result is, the degradation after-drawing intensity through 72 hours still can reach
14.21MPa
Embodiment 2
A kind of automotive hose rubber, calculates by weight, and its raw material composition and content are as follows:
After having weighed raw material and the reagent of said ratio amount, the step operation according to following:
Step one, the banburying temperature controlling banbury is 100 DEG C, puts into 120 parts of chlorinations of said ratio amount toward banbury
Polyethylene rubber and 50 parts of reinforcing agents, 15 parts of plasticizers, mixing 25 minutes, enter next step the most afterwards；
Step 2, continue successively toward banbury adds 2 parts of age resistor of said ratio amount, 0.7 part of vulcanizing agent, 2.5 parts
Accelerator, 10 parts of coupling agents, that 10 parts of crosslinking coagents carry out secondary is mixing, the sizing material after being plastified after 40 minutes；
Step 3, begins to pratise on a mill until by the sizing material in step 2, enters after making sizing material bag roller thin logical twice
Next step；
Step 4, the upper and lower mould temperature arranging vulcanizing press is 170 DEG C, and sizing material step 3 obtained is at compression molding
Vulcanize on machine, obtain automotive hose rubber.
At room temperature according to GB/T528-2009, " vulcanite or thermoplastic elastomer draw the automotive hose rubber of the present embodiment
Stretch the mensuration of ess-strain performance " carry out hot strength test, recording hot strength is 16.40MPa；At room temperature according to GB/
T529-2008 " vulcanite or the mensuration of thermoplastic elastomer tearing strength " carries out tear resistance test, measures tearing strength and is
52.96KN/m；Carry out according to GB/T3512-2001 " vulcanite or thermoplastic elastomer hot-air accelerated ageing and heat resistant test "
Heat-resistant air aging property is tested, and recording result is, the degradation after-drawing intensity through 72 hours still can reach
14.77MPa
Above-described embodiment 1, mixing time and the banburying temperature of the step one in 2 are relevant, and banburying temperature is at 100-110
All it is possible in the range of DEG C, through experiment, when temperature is less than 100 DEG C or higher than 110 DEG C, carries out banburying, drawing of products obtained therefrom
Stretch intensity, tearing strength the most defective.The most corresponding minimizing of a mixing time that the height of banburying temperature simultaneously is corresponding, and temperature is low
Just corresponding extending a mixing time, controlling the most mixing time is 10-20 minute.The secondary of same step 2
Mixing is also such, controls temperature and time accordingly.
Age resistor in step 2, vulcanizing agent, accelerator, coupling agent, the addition sequence of crosslinking coagent are also permissible simultaneously
Adjusting, but the order of embodiment one, two is the optimum results through many experiments, such operating effect is good.
In step 3, in mill, bag roller and the thin logical number of occurrence of sizing material can be adjusted according to actual needs,
In embodiment sizing material bag roller and thin logical be for twice by optimization experiment after more excellent result, such operating effect is good and the used time with
Cost is relatively low.
In step 4, vulcanizing press is used to vulcanize, it is possible to use other vulcanizing equipments.The temperature simultaneously vulcanized
Being set to 150-170 DEG C is to need the thickness according to sizing material to be vulcanized to determine, the thickness of sizing material is different, temperature during sulfuration
Degree, pressure and persistent period are also different, and need control is that temperature during sulfuration is in the range of 150-170 DEG C.
The present embodiment gives automobile glue prepared by a kind of automotive hose rubber using above-described embodiment 1,2 simultaneously
Pipe, the rubber that this sebific duct uses is with above-mentioned automotive hose rubber, can add the fiber of reinforcement as required simultaneously, as
Tinsel, artificial cellosilk etc. strengthen the intensity of sebific duct.
The beneficial effect of embodiment and effect
The automotive hose rubber provided according to the present embodiment, due to have employed have more excellent cold-resistant, ageing-resistant, resistance to smelly
The chlorinated polyethylene rubber of oxygen, oil resistant and flame resistance, the elastomeric material of preparation has cheap, hot strength, tearing strength
The advantages such as height, ageing-resistant performance are good.
It addition, the automotive hose rubber that the present embodiment is provided, the raw material used in formula is all on the market can be big
The raw material of amount supply, easily obtains and price is the most proper, so the automotive hose robber materials ratio that the present invention provides
More moderate, facilitate enterprise to generate.
Further, the automotive hose rubber of the present embodiment is at room temperature according to GB/T528-2009 " vulcanite or thermoplastic
The mensuration of property rubber tensile ess-strain performance " carry out hot strength test, recording hot strength is 15.91～16.40MPa；
At room temperature carry out tear resistance survey according to GB/T529-2008 " vulcanite or the mensuration of thermoplastic elastomer tearing strength "
Examination, measuring tearing strength is 50.37～52.96KN/m；According to GB/T3512-2001, " vulcanite or thermoplastic elastomer heat are empty
Gas accelerated ageing and heat resistant test " carry out heat-resistant air aging property test, recording result is, through the degradation of 72 hours
After-drawing intensity still can reach 14.21～14.77MPa, and above Mechanics Performance Testing is superior to the ginseng of national standard relevant regulations
Number, has reached the requirement of actual application.
In a word, the present invention provide a kind of automotive hose rubber, have cheap, hot strength, tearing strength are high, resistance to
The features such as ageing properties is good.And its preparation method due to technique simple, easy to control, therefore there is technology maturation, quickly, efficiently etc.
Feature, and be suitable to industrialized production.
Claims (10)
1. an automotive hose rubber, it is characterised in that calculate by weight, including following component:
Wherein, described reinforcing agent is the mixture of any one or more in white carbon black, white carbon, calcium carbonate, potter's clay,
Described plasticizer is the mixture of any one or more in vaseline, naphthenic oil, paraffin oil and ester,
Described vulcanizing agent is the mixture of any one or more in sulfur, organic peroxide, metal-oxide,
Described accelerator is thiazole accelerator, thuriam acceserator, dithiocarbamate accelerator, aldehyde amines rush
Enter the mixing of any one or more in agent, xanthate accelerator, Thiourea accelerator, sulfenamide type accelerators
Thing,
Described coupling agent is by appointing in boric acid ester coupler, aluminate coupling agent, titanate coupling agent, aluminium titanium composite coupler
Anticipate one or more mixture；
Described crosslinking coagent is any one or the mixing of two kinds that N, a N '-penylene span comes in phthalimide, trithiocyanuric acid
Thing；
Described age resistor is Hinered phenols antioxidant.
Described automotive hose rubber the most according to claim 1, it is characterised in that:
Wherein, the model of described chlorinated polyethylene rubber is CM135B.
Described automotive hose rubber the most according to claim 1, it is characterised in that:
Wherein, described reinforcing agent is white carbon black N550 or white carbon black N774.
Described automotive hose rubber the most according to claim 1, it is characterised in that:
Wherein, described plasticizer is dioctyl phthalate or phthalic acid two (2-ethyl hexyl) ester.
Described automotive hose rubber the most according to claim 1, it is characterised in that:
Wherein, described vulcanizing agent is the mixture of sulfur, organic peroxide 1:1 in mass ratio composition.
Described automotive hose rubber the most according to claim 1, it is characterised in that:
Wherein, described organic peroxide is cumyl peroxide.
Described automotive hose rubber the most according to claim 1, it is characterised in that:
Wherein, described accelerator is 2-mercaptobenzothiazole or dibenzothiazyl disulfide.
Described automotive hose rubber the most according to claim 1, it is characterised in that:
Wherein, described age resistor be Hinered phenols antioxidant AO-80,2, tri-grades of butyl-4-methylphenols of 6-, double (3,5-tri-grades
Butyl-4-hydroxy phenyl) thioether, any one in four (β-(3,5-tri-grades of butyl-4-hydroxy phenyls) propanoic acid) pentaerythritol ester
Kind.
9. the preparation method of the described automotive hose rubber of any one in claim 1-8, it is characterised in that include with
Lower step:
Step one, puts into the described chlorinated polyethylene rubber of proportional quantity, described reinforcing agent, described at a temperature of 100-110 DEG C
Plasticizer carries out the most mixing, mixing uniformly after enter next step；
Step 2, continues to put into the described plasticizer of proportional quantity, described vulcanizing agent, described accelerator, described coupling agent, described friendship
Connection auxiliary agent, described age resistor carry out secondary mixing after plastified after sizing material；
Step 3, begins to pratise the described sizing material in step 2 so that it is bag roller the thinnest leading to enter next step the most afterwards；
Step 4, the upper and lower mould temperature arranging vulcanizer is that the 150-170 DEG C of sizing material obtaining step 3 vulcanizes, and obtains institute
State automotive hose rubber.
10. an automotive hose, it is characterised in that be made up of the described automotive hose rubber of any one in claim 1-8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610681208.3A CN106117850A (en) | 2016-08-17 | 2016-08-17 | A kind of automotive hose rubber and preparation method, automotive hose |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610681208.3A CN106117850A (en) | 2016-08-17 | 2016-08-17 | A kind of automotive hose rubber and preparation method, automotive hose |
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| CN106117850A true CN106117850A (en) | 2016-11-16 |
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| CN201610681208.3A Pending CN106117850A (en) | 2016-08-17 | 2016-08-17 | A kind of automotive hose rubber and preparation method, automotive hose |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112574374A (en) * | 2020-11-30 | 2021-03-30 | 北京宇航系统工程研究所 | Modified polyurethane high-temperature-resistant rubber and preparation method thereof |
| CN114773741A (en) * | 2022-06-01 | 2022-07-22 | 徐州市华为工程机械有限公司 | Thermoplastic rubber tube and preparation process thereof |
| CN115322461A (en) * | 2022-07-21 | 2022-11-11 | 青岛橡六胶管有限公司 | Rubber tube suitable for hydraulic transmission under mine and preparation method thereof |
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| CN104861320A (en) * | 2015-06-17 | 2015-08-26 | 安徽大学 | Rubber material for manufacturing hydraulic power-assisted rubber hose for automobile and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104861320A (en) * | 2015-06-17 | 2015-08-26 | 安徽大学 | Rubber material for manufacturing hydraulic power-assisted rubber hose for automobile and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112574374A (en) * | 2020-11-30 | 2021-03-30 | 北京宇航系统工程研究所 | Modified polyurethane high-temperature-resistant rubber and preparation method thereof |
| CN114773741A (en) * | 2022-06-01 | 2022-07-22 | 徐州市华为工程机械有限公司 | Thermoplastic rubber tube and preparation process thereof |
| CN115322461A (en) * | 2022-07-21 | 2022-11-11 | 青岛橡六胶管有限公司 | Rubber tube suitable for hydraulic transmission under mine and preparation method thereof |
| CN115322461B (en) * | 2022-07-21 | 2023-08-08 | 青岛橡六胶管有限公司 | Rubber tube suitable for hydraulic transmission under mine and preparation method thereof |
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Application publication date: 20161116 |