CN106832609A - A kind of resistance to braking fluid, low compression set EPT rubber composition and preparation method thereof - Google Patents
A kind of resistance to braking fluid, low compression set EPT rubber composition and preparation method thereof Download PDFInfo
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- CN106832609A CN106832609A CN201710022372.8A CN201710022372A CN106832609A CN 106832609 A CN106832609 A CN 106832609A CN 201710022372 A CN201710022372 A CN 201710022372A CN 106832609 A CN106832609 A CN 106832609A
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM 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
- 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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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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
- C08L2312/00—Crosslinking
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Abstract
The invention discloses a kind of resistance to braking fluid, low compression set EPT rubber composition, it is made up of following content of component：Ethylene propylene diene rubber, 70~95 mass parts；Oil extended EPDM, 10~60 mass parts；Zinc oxide, 3~6 mass parts；Stearic acid, 0.3~1.2 mass parts；Fast extrude in carbon black N550,40~100 mass parts；Semi-reinforcing hydrocarbon black N774,0~70 mass parts；Polyethylene glycol, 2~4 mass parts；Flow promortor, 1~3 mass parts；Age resistor, 0.8~2 mass parts；Crosslinking agent：2~4 mass parts；Auxiliary curing agent TAIC：1~3 mass parts；Auxiliary curing agent 154D：0.8~2.5 mass parts；Sulphur S 80：0.1~0.4 mass parts.EPT rubber composition of the present invention improves compression set performance on the premise of resistance to braking fluid, extends service life of the rubber hose on automobile, it is ensured that its security.
Description
Technical field
The invention belongs to field of rubber technology, it is related to a kind of EPT rubber composition and preparation method thereof, specifically relates to
And a kind of resistance to braking fluid, low compression set EPT rubber composition formula and preparation method thereof.
Background technology
Ethylene propylene diene rubber (EPDM) is the copolymer of ethene, propylene and a small amount of non-conjugated diene hydrocarbon, because its main chain is
It is made up of chemically stable saturated hydrocarbons, only contains unsaturated double-bond in side chain, therefore its resistance to ozone, heat-resisting, weather-proof etc. are ageing-resistant
Excellent performance, can be widely used for the fields such as automobile component, electric wire and cable jacket, heat-resistant rubber hose, automotive sealant.With garage
The fast development of industry, automobile rubber flexible pipe is received more and more attention as the important safety part of automobile, wherein, because of automobile
Brake percentage is more frequent in running at high speed, and the operating ambient temperature range of brake fluid is relatively widened before, in brake system of car
The requirement of the hydraulic-brake hose for using also more and more higher.Ethylene propylene diene rubber has developed into hydraulic braking because of its excellent performance
The first-selected raw material of flexible pipe.Double bond is less in ethylene propylene diene rubber molecular structure, often due to vulcanization journey in vulcanization process
Degree etc. causes its compressive deformation big, is unsatisfactory for the requirement that sealing, anti-leakage require hydraulic-brake hose high.Using P-VW
3307 methods, sizing material carry out 24h compression set performance tests at compressing 50%, 120 DEG C, and generally, ethylene propylene diene rubber exists
Compression set under the conditions of this is more than 70%.Therefore, a kind of resistance to braking fluid, low compression set ethylene-propylene-diene monomer are developed
Glue composition has wide market application foreground.
The content of the invention
The main object of the present invention is to provide the ethylene propylene diene rubber combination of a kind of resistance to braking fluid, low compression set
Thing.
The purpose of the present invention is achieved through the following technical solutions：
A kind of resistance to braking fluid, low compression set EPT rubber composition, it is by the component of following mass parts
It is prepared from：Ethylene propylene diene rubber, 70~95 mass parts；Oil extended EPDM, 10~60 mass parts；Zinc oxide, 3~6
Mass parts；Stearic acid, 0.3~1.2 mass parts；Fast extrude in carbon black N550,40~100 mass parts；Semi-reinforcing hydrocarbon black N774,0~
70 mass parts；Polyethylene glycol, 2~4 mass parts；Flow promortor, 1~3 mass parts；Age resistor, 0.8~2 mass parts；Crosslinking agent, 2
~4 mass parts；Auxiliary curing agent TAIC (iso-cyanuric acid triallyl ester), 1~3 mass parts；Auxiliary curing agent 154D, 0.8~2.5
Mass parts；Sulphur S-80,0.1~0.4 mass parts；Wherein, institute in described ethylene propylene diene rubber and oil extended EPDM
Total amount containing ethylene propylene diene rubber is 100 mass parts.
Preferably, described EPT rubber composition is prepared from by the component of following mass parts：EPDM
Rubber, 75~90 mass parts；Oil extended EPDM, 20~50 mass parts；Zinc oxide, 3~5 mass parts；Stearic acid, 0.5
~1 mass parts；Fast extrude in carbon black N550,50~90 mass parts；Semi-reinforcing hydrocarbon black N774,15~60 mass parts；Polyethylene glycol,
2.5~3.5 mass parts；Flow promortor, 1.5~2.5 mass parts；Age resistor, 1~2 mass parts；Crosslinking agent, 2.5~3.5 mass
Part；Auxiliary curing agent TAIC, 1~2 mass parts；Auxiliary curing agent 154D, 1~2 mass parts；Sulphur S-80,0.1~0.4 mass parts.
Described ethylene propylene diene rubber is the ethylene propylene diene rubber of ethylene contents 48~54%.
Ethylene propylene diene rubber and oil-filled mass ratio are 1 in described oil extended EPDM：1；Ethylene-propylene-diene monomer
The ethylene contents of glue are 62%.Present invention uses two kinds of rubbers of ethylene propylene diene rubber and oil extended EPDM, it is to avoid
The exclusive use of plasticizer, the plasticizer in obtained vulcanizate is also more resistant to the extraction of brake fluid.The present invention uses ethylene contents
48~54% ethylene propylene diene rubber, is random rubber, and preferably, but its molecular weight is relatively low and Third monomer for mobility and elasticity
Content is relatively low, and exclusive use can cause the crosslinking degree of vulcanizate relatively low without possessing excellent compression set performance.Make
Oil extended EPDM is semicrystalline rubber, and molecular weight is higher, under high temperature elasticity preferably and Third monomer content compared with
Height, both and use can improve the crosslinking degree of vulcanizate, improve resistance to braking fluid performance and the compression set of vulcanizate
Energy.The present invention passes through and uses both ethylene propylene diene rubbers, so as to get EPT rubber composition not only meet basic thing
Rationality can also have excellent compression set performance.
Described polyethylene glycol is PEG 4000；The preferably PEG 4000 of sheet.Relative to the poly- second of other molecular weight
Glycol, the good additions of sheet PEG 4000 have good compatibility, are difficult to separate out with organic constituentses, play neutralization filler it is acid,
Accelerate curingprocess rate and improve the effect of crosslink density.
Described flow promortor is flow promortor LD-53.
Described age resistor is antioxidant MB (2-mercaptobenzimidazole).
Described crosslinking agent is DCP (cumyl peroxide).
It is a further object to provide the preparation method of EPT rubber composition, step is as follows：
Ethylene propylene diene rubber, oil extended EPDM, zinc oxide, stearic acid, fast extrude in carbon black are weighed according to formula
N550, semi-reinforcing hydrocarbon black N774, polyethylene glycol, flow promortor, age resistor, crosslinking agent, auxiliary curing agent TAIC, auxiliary curing agent 154D
With sulphur S-80；While adding ethylene propylene diene rubber and oil extended EPDM in banbury, 30~40s of agitating heating,
Treat that temperature reaches 60 DEG C, add zinc oxide, stearic acid, N550, N774, polyethylene glycol, flow promortor, age resistor, crosslinking agent, help
Vulcanizing agent TAIC and auxiliary curing agent 154D, continues 100~120s of agitating heating, treats that temperature reaches 90 DEG C, adds sulphur S-80, after
Continuous stirring, when banbury temperature reaches 130 DEG C, stops stirring and heats, dumping；The elastomeric compound for obtaining is thin logical on a mill
2~3 times, go out adhesive tape, after adhesive tape is through anti-mucus, by air cooler, be cooled to 20~35 DEG C.Wherein, described anti-mucus is
2% aqueous solution of zinc stearate.
The beneficial effects of the invention are as follows：
The present invention is used in combination as vulcanization aid using zinc oxide and stearic acid, can improve the crosslinking degree of vulcanizate,
The process safety and resistance to ag(e)ing of sizing material can be improved again.Due to the resistance to braking fluid to vulcanizate, compression set performance will
Ask higher, so selection and proportioning to vulcanizing system, reinforcement system and protection system are more crucial.The crosslinking that the present invention is used
Agent DCP, auxiliary curing agent TAIC, the vulcanizing system of auxiliary curing agent 154D and S-80 composition, fast extrude in carbon black N550 and half reinforcement charcoal
The reinforcement system of black N774 compositions, antioxidant MB can either ensure that vulcanized rubber meets Fundamental Physical Properties as protection system
With resistance to braking fluid performance, the low compression set performance of technical requirements can be reached again.During elastomeric compound is prepared, point
Addition vulcanizing agent is opened, crosslinking agent, auxiliary curing agent TAIC and auxiliary curing agent 154D, later stage temperature to be mixed are first added in lower temperature
Degree adds sulphur S-80 when higher, it is to avoid sulphur S-80 reacts in mixing process because of overlong time.
EPT rubber composition of the invention on the premise of resistance to braking fluid, using the methods of P-VW 3307, sizing material pressure
24h compression set performance tests are carried out at 50%, 120 DEG C of contracting, compression set is respectively less than 40%, significantly improves glue
The compression set performance of material, extends service life of the rubber hose on automobile, it is ensured that its security.
Specific embodiment
Technical scheme is further described below by specific embodiment.
The component and consumption of the EPT rubber composition of embodiment 1-3 are as shown in table 1, by following methods preparation
Into：Each component is weighed according to formula；Add ethylene propylene diene rubber and oil extended EPDM 4869C simultaneously in banbury,
30~40s of agitating heating, treat that temperature reaches 60 DEG C, add zinc oxide, stearic acid, N550, N774, polyethylene glycol PEG4000, stream
Dynamic auxiliary agent LD-53, antioxidant MB, crosslink agent DCP, auxiliary curing agent TAIC and auxiliary curing agent 154D, continuation agitating heating 100~
120s, treats that temperature reaches 90 DEG C, adds sulphur S-80, continues to stir, when banbury temperature reaches 130 DEG C, stop stirring and
Heating, dumping；The elastomeric compound for obtaining is thin on a mill to be led to 2~3 times, goes out adhesive tape, after adhesive tape is through anti-mucus, is set by air-cooled
It is standby, it is cooled to 20~35 DEG C.Wherein, described anti-mucus is 2% aqueous solution of zinc stearate.
The component and consumption (mass unit of the embodiment 1-3 EPT rubber compositions of table 1：Gram)
Note：Ethylene propylene diene rubber ethylene contents 48~54%；Oil extended EPDM is the new high-performance elastic of Alang
The product of body Co., Ltd production, trade mark 4869C；Polyethylene glycol PEG 4000 is the PEG 4000 of sheet.
Comparative example 1：The mass parts of ethylene propylene diene rubber 75；The mass parts of oil extended EPDM 50；The mass of stearic acid 0.5
Part；The mass parts of fast extrude in carbon black N550 50；The mass parts of semi-reinforcing hydrocarbon black N774 60；The mass parts of PEG 4,000 3；Flow promortor
The mass parts of LD-53 2.5；The mass parts of antioxidant MB 1；The mass parts of crosslink agent DCP 2.5；The mass parts of auxiliary curing agent TAIC 1.5；
The mass parts of auxiliary curing agent 154D 1；The mass parts of sulphur S-80 0.15.
Comparative example 2：Using the mass parts of oil extended EPDM 200, only add the mass parts of fast extrude in carbon black N550 50 and
, used as reinforcement system, rubber hardness is too low, therefore is adjusted to formula as below for the mass parts of semi-reinforcing hydrocarbon black N774 60：Oil-filled ternary
The mass parts of EP rubbers 200；The mass parts of zinc oxide 3；The mass parts of stearic acid 0.5；The mass parts of fast extrude in carbon black N550 130；Half mends
The strong mass parts of carbon black N774 130；The mass parts of PEG 4,000 3；The mass parts of flow promortor LD-53 2.5；The mass of antioxidant MB 1
Part；The mass parts of crosslink agent DCP 2.5；The mass parts of auxiliary curing agent TAIC 1.5；The mass parts of auxiliary curing agent 154D 1；Sulphur S-80
0.15 mass parts.
Comparative example 3：The mass parts of ethylene propylene diene rubber 75；The mass parts of oil extended EPDM 50；The mass parts of zinc oxide 3；
The mass parts of stearic acid 0.5；The mass parts of fast extrude in carbon black N550 50；The mass parts of semi-reinforcing hydrocarbon black N774 60；The matter of PEG 4,000 3
Amount part；The mass parts of flow promortor LD-53 2.5；The mass parts of antioxidant MB 1；The mass parts of crosslink agent DCP 1.5；Auxiliary curing agent
The mass parts of TAIC 1.5；The mass parts of auxiliary curing agent 154D 1；The mass parts of sulphur S-80 0.15.
The performance parameter of EPT rubber composition is as shown in table 2 obtained in above-described embodiment 1-3：
The performance parameter of EPT rubber composition obtained in the embodiment 1-3 of table 2
EPT rubber composition hardness 71 obtained in comparative example 1 (Shao Er A), tensile strength 14.5MPa, extension at break
Rate 239.6%, compares embodiment 1, and its crosslink density declines, while heat aging property reduction.The 72h under 120 DEG C of environment, breaks
It is -8.7% to split elongation change rate.24h is carried out at compressing 50%, 120 DEG C using the methods of P-VW 3307, sizing material and compresses permanent
Deformation performance is tested, and compression set is more than 40%, is 42%.
EPT rubber composition hardness 68 obtained in comparative example 2 (Shao Er A), tensile strength 12.7MPa, extension at break
Rate 267.2%.24h compression set performance tests are carried out at compressing 50%, 120 DEG C using the methods of P-VW 3307, sizing material,
Compression set is more than 40%, is 78%.
EPT rubber composition hardness 67 obtained in comparative example 3 (Shao Er A), tensile strength 13.1MPa, extension at break
Rate 254.3%.24h compression set performance tests are carried out at compressing 50%, 120 DEG C using the methods of P-VW 3307, sizing material,
Compression set is more than 40%, is 72%.
A few group of formula acquired results are analyzed more than, and EPT rubber composition of the invention meets resistance to braking fluid
It is required that, carry out 24h compression set performance tests, ternary second at compressing 50%, 120 DEG C using the methods of P-VW 3307, sizing material
The compression set of the third rubber composition is respectively less than 40%.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to structure of the invention
Think and scope is defined, under the premise of design concept of the present invention is not departed from, ordinary skill technical staff is to this hair in this area
The all variations and modifications that bright technical scheme is made, all should fall into protection scope of the present invention, claimed skill of the invention
Art content has all been recorded in detail in the claims.
Claims (10)
1. a kind of resistance to braking fluid, low compression set EPT rubber composition, it is characterised in that it is by following quality
The component of part is prepared from：Ethylene propylene diene rubber, 70~95 mass parts；Oil extended EPDM, 10~60 mass parts；Oxidation
Zinc, 3~6 mass parts；Stearic acid, 0.3~1.2 mass parts；Fast extrude in carbon black N550,40~100 mass parts；Semi-reinforcing hydrocarbon black
N774,0~70 mass parts；Polyethylene glycol, 2~4 mass parts；Flow promortor, 1~3 mass parts；Age resistor, 0.8~2 mass parts；
Crosslinking agent, 2~4 mass parts；Auxiliary curing agent TAIC, 1~3 mass parts；Auxiliary curing agent 154D, 0.8~2.5 mass parts；Sulphur S-
80,0.1~0.4 mass parts；Wherein, contained ethylene propylene diene rubber in described ethylene propylene diene rubber and oil extended EPDM
Total amount is 100 mass parts.
2. EPT rubber composition according to claim 1, it is characterised in that described ethylene propylene diene rubber combination
Thing is prepared from by the component of following mass parts：Ethylene propylene diene rubber, 75~90 mass parts；Oil extended EPDM, 20
~50 mass parts；Zinc oxide, 3~5 mass parts；Stearic acid, 0.5~1 mass parts；Fast extrude in carbon black N550,50~90 mass parts；
Semi-reinforcing hydrocarbon black N774,15~60 mass parts；Polyethylene glycol, 2.5~3.5 mass parts；Flow promortor, 1.5~2.5 mass parts；
Age resistor, 1~2 mass parts；Crosslinking agent, 2.5~3.5 mass parts；Auxiliary curing agent TAIC, 1~2 mass parts；Auxiliary curing agent 154D,
1~2 mass parts；Sulphur S-80,0.1~0.4 mass parts.
3. EPT rubber composition according to claim 1, it is characterised in that described ethylene propylene diene rubber is second
The ethylene propylene diene rubber of alkene content 48~54%.
4. EPT rubber composition according to claim 1, it is characterised in that described oil extended EPDM
Middle ethylene propylene diene rubber is 1 with oil-filled mass ratio：1；The ethylene contents of ethylene propylene diene rubber are 62%.
5. EPT rubber composition according to claim 1, it is characterised in that described polyethylene glycol is
PEG4000。
6. EPT rubber composition according to claim 1, it is characterised in that described flow promortor is helped for flowing
Agent LD-53.
7. EPT rubber composition according to claim 1, it is characterised in that described age resistor is antioxidant MB.
8. EPT rubber composition according to claim 1, it is characterised in that described crosslinking agent is DCP.
9. the preparation method of the EPT rubber composition described in claim 1, it is characterised in that step is as follows：According to formula
Weigh ethylene propylene diene rubber, oil extended EPDM, zinc oxide, stearic acid, fast extrude in carbon black N550, semi-reinforcing hydrocarbon black
N774, polyethylene glycol, flow promortor, age resistor, crosslinking agent, auxiliary curing agent TAIC, auxiliary curing agent 154D and sulphur S-80；Close
Ethylene propylene diene rubber and oil extended EPDM are added in mill simultaneously, 30~40s of agitating heating, treat that temperature reaches 60 DEG C,
Add zinc oxide, stearic acid, N550, N774, polyethylene glycol, flow promortor, age resistor, crosslinking agent, auxiliary curing agent TAIC and help
Vulcanizing agent 154D, continues 100~120s of agitating heating, treats that temperature reaches 90 DEG C, adds sulphur S-80, continues to stir, and works as banburying
When machine temperature reaches 130 DEG C, stop stirring and heat, dumping；The elastomeric compound for obtaining is thin on a mill to lead to 2~3 times, plastic emitting
Bar, after adhesive tape is through anti-mucus, by air cooler, is cooled to 20~35 DEG C.
10. the preparation method of EPT rubber composition according to claim 9, it is characterised in that described anti-mucus
It is 2% aqueous solution of zinc stearate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710022372.8A CN106832609B (en) | 2017-01-12 | 2017-01-12 | Brake fluid-resistant low-compression-set ethylene propylene diene monomer composition and preparation method thereof |
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| CN201710022372.8A CN106832609B (en) | 2017-01-12 | 2017-01-12 | Brake fluid-resistant low-compression-set ethylene propylene diene monomer composition and preparation method thereof |
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| CN110204838A (en) * | 2019-06-20 | 2019-09-06 | 宁国市正道橡塑零部件有限公司 | A kind of high rigidity low compression set ethylene propylene diene rubber and preparation method thereof |
| CN110903562A (en) * | 2019-12-16 | 2020-03-24 | 江苏冠联新材料科技股份有限公司 | EPDM rubber material for high-strength high-temperature-resistant low-compression-set automobile lifting lug |
| CN110938262A (en) * | 2019-12-23 | 2020-03-31 | 安徽环球星新能源科技有限公司 | Preparation method of rubber air path pipe for air source trans-critical carbon dioxide heat pump |
| CN111607163A (en) * | 2019-02-26 | 2020-09-01 | 江苏骆氏减震件有限公司 | Ethylene propylene rubber, raw material composition thereof, lifting lug, preparation method and application thereof |
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