CN108976614A - EPT rubber composition and preparation method thereof - Google Patents
EPT rubber composition and preparation method thereof Download PDFInfo
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- CN108976614A CN108976614A CN201810707420.1A CN201810707420A CN108976614A CN 108976614 A CN108976614 A CN 108976614A CN 201810707420 A CN201810707420 A CN 201810707420A CN 108976614 A CN108976614 A CN 108976614A
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The present invention relates to a kind of EPT rubber composition and preparation method thereof, the raw material components including following mass fraction: 50~150 parts of ethylene propylene diene rubber, 4~6 parts of zinc oxide, 0.5~1 part of stearic acid, 1~3 part of polyethylene glycol, 100~110 parts of modified pyrophyllite, 120~130 parts of carbon black, 70~75 parts of paraffin oil, 0.5~1 part of sulphur and 2.5~7 parts of promotor.The EPT rubber composition that the present invention obtains, the selection asepsis environment-protecting of raw material components, and effectively by each component compatibility, make EPT rubber composition significant decrease compression set and heat resistance is excellent, still especially there is preferable heat resistance at 150 DEG C, the performance of the rubber composition of far superior to existing sulfur cross-linking system preparation, and close but cost is far below the rubber composition of peroxide vulcanizing system preparation, post vulcanization technique is not needed, simplifies sulfuration process and reduced production cost yet.
Description
Technical field
The invention belongs to technical field of rubber material more particularly to a kind of EPT rubber composition and its preparation sides
Method.
Background technique
Ethylene propylene diene rubber is the copolymer of ethylene, propylene and a small amount of non-conjugated diene hydrocarbon, is one kind of EP rubbers,
It is indicated with EPDM (Ethylene Propylene Diene Monomer), because its main chain is by chemically stable saturated hydrocarbons group
At only containing unsaturated double-bond in the side chain, therefore the ageing-resistant performances such as its resistance to ozone, heat-resisting, weather-proof are excellent, can be widely used for vapour
The fields such as vehicle component, building water-proof material, electric wire and cable jacket, heat-resistant rubber hose, adhesive tape, automotive sealant.
Sulphur, sulphur/peroxide, mistake are generallyd use when the formula design of ethylene propylene diene rubber (EPDM) in the prior art
Oxide curative systems.Sulfur often uses promotor, such as TMTD, DTDM, there are toxicity, carcinogenicity nitrosamine, also, sulphur
The temperature classification of class is lower (≤125 DEG C), and compression set is big；Peroxide often uses crosslinking agent, such as DCP, DBP, BIBP
Deng, need to be required in special rubber performance and special processing conditions under limitedly apply, also, there are peculiar smell, spray are brilliant, at high cost
The problems such as, post vulcanization technique is often used when being vulcanized, step is complicated；Simultaneously by high filling proportion, low gum content because
, there are the cross-linking aids such as TAIC in the influence of element, and the dosage of peroxide crosslinking agent can not still effectively reduce, and cause immediately
Rubber composition higher cost.
Summary of the invention
The present invention for the above technical issues, proposes a kind of EPT rubber composition and preparation method thereof.
In order to achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of EPT rubber composition, the raw material components including following mass fraction: 50~150 parts of EPDM
Rubber, 4~6 parts of zinc oxide, 0.5~1 part of stearic acid, 1~3 part of polyethylene glycol, 100~110 parts of modified pyrophyllite,
120~130 parts of carbon black, 70~75 parts of paraffin oil, 0.5~1 part of sulphur and 2.5~7 parts of promotor.
Preferably, the ethylene propylene diene rubber includes 125 DEG C of Mooney viscosity ML (1+4) for 55~65 and ethylene contents are
60%~70% ethylene propylene diene rubber and/or 125 DEG C of Mooney viscosity ML (1+4) for 75~85 and ethylene contents be 45%~
55% ethylene propylene diene rubber.
Preferably, the ethylene propylene diene rubber includes 125 DEG C of Mooney viscosity ML (1+4) for 55~65 and ethylene contents are
60%~70% ethylene propylene diene rubber and 125 DEG C of Mooney viscosity ML (1+4) is 75~85 and ethylene contents are 45%~55%
Ethylene propylene diene rubber.
Preferably, the ternary that 125 DEG C of the Mooney viscosity ML (1+4) are 55~65 and ethylene contents are 60%~70%
EP rubbers and the ethylene-propylene-diene monomer that 125 DEG C of the Mooney viscosity ML (1+4) are 75~85 and ethylene contents are 45%~55%
The mass ratio of glue is 1~5:1.
Preferably, the carbon black is N550 carbon black.
Preferably, the sulphur is sulphur IS-60.
Preferably, the promotor includes promotor IS-60, promotor TBzTD-70, accelerant MBT -80 and promotes
One or more of agent DM combination.
Preferably, the promotor includes the raw material components of following parts by weight: 0.5~1 part of promotor IS-60,
0.5~1 part of promotor TBzTD-70,1~3 part of accelerant MBT -80 and 1~3 part of altax.
A kind of preparation method of above-mentioned EPT rubber composition, comprising the following steps: take ethylene propylene diene rubber, oxidation
Zinc and polyethylene glycol are added mixer and carry out pressurization mixing；When temperature reaches 30~35 DEG C, be added modified pyrophyllite, carbon black and
The pressurization of paraffin oil row is kneaded；When temperature reaches 80~85 DEG C, sulphur is added and promotor carries out pressurization mixing；When temperature reaches
At 90 DEG C~95 DEG C, the sizing material mixed is discharged on open mill and returns glue mixing, obtains EPDM through vulcanizing treatment after bottom sheet
Rubber composition.
Preferably, the following steps are included: the vulcanizing treatment condition is 150~180 DEG C of 20~40min of vulcanization.
Compared with prior art, the advantages and positive effects of the present invention are:
1, a kind of EPT rubber composition provided by the invention and preparation method thereof selects polyethylene glycol as processing
Auxiliary agent, price is low, has excellent dispersibility, and the balance of reinforcement and processability can be obtained in rubber composition, improves system
The ageing resistance of product improves the infiltration erosion that product resists soda acid class I liquid I；Select modified pyrophyllite as rubber and plastic reinforcing agent
And with making to have the function of when EPT rubber composition to significantly reduce compression set, and filler reinforcement is commonly used with other
Agent, such as kaolin, light calcium and used time are substantially to no effect；Select different Mooney viscosities, ethylene contents ethylene propylene diene rubber simultaneously
With, make the EPT rubber composition obtained that there is the raw rubber ratio of low compression set, combine it is good it is resistance to it is high,
Cryogenic property, heat resistance is excellent, especially still has preferable heat resistance, far superior to existing sulfur cross-linking system preparation at 150 DEG C
Rubber composition performance, and close but cost is far below the ethylene propylene diene rubber combination of peroxide vulcanizing system preparation
Object.
2, a kind of EPT rubber composition provided by the invention and preparation method thereof, without using it is toxic, have it is carcinogenic
Property nitrosamine promotor, meet VOC environmental requirement, meanwhile, avoid generating the adverse effects such as aminolysis to polyester line product；This hair
It is bright not use peroxide crosslinking agent, post vulcanization technique is not needed in carrying out vulcanisation step, simplifies rubber composition
Vulcanisation step, greatly reduce the preparation cost of EPT rubber composition, and improve EPT rubber composition
Curing efficiency.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
A kind of EPT rubber composition, the raw material components including following mass fraction: 50~150 parts of EPDM
Rubber, 4~6 parts of zinc oxide, 0.5~1 part of stearic acid, 1~3 part of polyethylene glycol, 100~110 parts of modified pyrophyllite,
120~130 parts of carbon black, 70~75 parts of paraffin oil, 0.5~1 part of sulphur and 2.5~7 parts of promotor.
The present invention is by modified pyrophyllite Create E2 and polyethylene glycol PEG-6000 and with can bring significant heat resistance
And compression set is effectively reduced, the elasticity of rubber can be damaged for non-black-reinforced filler, increase the permanent change of compression
Shape, under stress, rubber molecular chain slides on inactive filler surface for this, after removing destressing, and hinders rubber
The recovery of strand is related.In the ingredient of modified leaf wax containing 80% or more silica, and PEG-6000 pairs of polyethylene glycol
Silica has special activation, peptizaiton, and rubber and non-black-reinforced filler in rubber composition can be improved
Binding performance reduces the displacement of rubber molecular chain under stress, reduces the inhibition restored to rubber molecular chain, to drop
Low compression set.
In an alternative embodiment, it is 55~65 and second that the ethylene propylene diene rubber, which includes 125 DEG C of Mooney viscosity ML (1+4),
Ethylene propylene diene rubber that alkene content is 60%~70% and/or 125 DEG C of Mooney viscosity ML (1+4) are 75~85 and ethylene contents are
45%~55% ethylene propylene diene rubber.
In an alternative embodiment, it is 55~65 and second that the ethylene propylene diene rubber, which includes 125 DEG C of Mooney viscosity ML (1+4),
Ethylene propylene diene rubber that alkene content is 60%~70% and 125 DEG C of Mooney viscosity ML (1+4) are 75~85 and ethylene contents are
45%~55% ethylene propylene diene rubber.
EPT rubber composition provided by the invention, by compatibility add different Mooney viscosities, ethylene contents three
First EP rubbers makes the EPT rubber composition obtained have more preferably raw rubber ratio, significantly reduces compression set.
Specifically, the ternary second that 125 DEG C of the Mooney viscosity ML (1+4) are 55~65 and ethylene contents are 60%~70%
In third rubber, 125 DEG C of Mooney viscosity ML (1+4) can be 55,58,60 or 65；Ethylene contents can for 60%, 62%, 64%,
66%, 68% or 70%；
The ethylene propylene diene rubber that 125 DEG C of the Mooney viscosity ML (1+4) are 75~85 and ethylene contents are 45%~55%
In, 125 DEG C of Mooney viscosity ML (1+4) can be 75,78,80,82 or 85；Ethylene contents can for 45%, 48%, 50%,
52% or 55%.
For the ethylene propylene diene rubber of the above-mentioned different Mooney viscosities and differing ethylene contents enumerated, those skilled in the art
It can be selected according to the actual application, to realize with other components compatibility, the permanent change of compression is effectively reduced
The effect of shape, Mooney viscosity and the ethylene contents ethylene propylene diene rubber obtained of random compatibility are in protection scope of the present invention
It is interior.
In an alternative embodiment, 125 DEG C of the Mooney viscosity ML (1+4) for 55~65 and ethylene contents be 60%~
70% ethylene propylene diene rubber with 125 DEG C of the Mooney viscosity ML (1+4) for 75~85 and ethylene contents be 45%~55%
The mass ratio of ethylene propylene diene rubber is 1~5:1.125 DEG C of the specific Mooney viscosity ML (1+4) is 55~65 and ethylene contents
125 DEG C of ethylene propylene diene rubber and the Mooney viscosity ML (1+4) for 60%~70% are 75~85 and ethylene contents are 45%
The mass ratio of~55% ethylene propylene diene rubber be 1:1,
In an alternative embodiment, the carbon black is preferably N550 carbon black.
In an alternative embodiment, the sulphur is preferably sulphur IS-60.
In an alternative embodiment, the promotor includes promotor IS-60, promotor TBzTD-70, accelerant MBT-
The combination of one or more of 80 and altax.Specific compatibility mode, those skilled in the art can according to actual needs into
Row selection.
In an alternative embodiment, the promotor includes the raw material components of following parts by weight: 0.5~1 part of promotion
Agent IS-60,0.5~1 part of promotor TBzTD-70,1~3 part of accelerant MBT -80 and 1~3 part of altax.
The present invention is in the ethylene-propylene-diene monomer using polyethylene glycol, modified pyrophyllite and Bu Tong same Mooney viscosity, ethylene contents
On the basis of the mutual compatibility of glue, the promotor of preferably above-mentioned compatibility, and above-mentioned promotor meets VOC environmental protection and wants without toxicity
It asks, avoids generating polyester line product the adverse effects such as aminolysis, while the present invention does not use peroxide crosslinking agent, is carrying out
Post vulcanization technique is not needed in vulcanisation step, is simplified the vulcanisation step of rubber composition, is greatly reduced ethylene-propylene-diene monomer
The preparation cost of glue composition, and the curing efficiency of EPT rubber composition is improved, while the ternary obtained can be made
EP rubbers composition has high-fire resistance (150 DEG C) and low compression set, obtains the ring that can satisfy product standard
Protect EPT rubber composition.
A kind of preparation method of above-mentioned EPT rubber composition, comprising the following steps: take ethylene propylene diene rubber, oxidation
Zinc and polyethylene glycol are added mixer and carry out pressurization mixing；When temperature reaches 30~35 DEG C, be added modified pyrophyllite, carbon black and
The pressurization of paraffin oil row is kneaded；When temperature reaches 80~85 DEG C, sulphur is added and promotor carries out pressurization mixing；When temperature reaches
At 90 DEG C~95 DEG C, the sizing material mixed is discharged on open mill and returns glue mixing, obtains EPDM through vulcanizing treatment after bottom sheet
Rubber composition.
In an alternative embodiment, comprising the following steps: the vulcanizing treatment condition be 150~180 DEG C vulcanization 20~
40min.Specifically, the vulcanizing treatment condition is 150~180 DEG C of 20~40min of vulcanization.
A kind of EPT rubber composition and its system provided by the embodiment of the present invention are introduced in detail in order to become apparent from
Preparation Method is described below in conjunction with specific embodiment.
Embodiment 1
A kind of EPT rubber composition, the raw material components including following mass fraction: 50 parts of ethylene propylene diene rubber,
6 parts of zinc oxide, 0.5 part of stearic acid, 3 parts of polyethylene glycol, 100 parts of modified pyrophyllite, 130 parts of N550 carbon black, 70
Paraffin oil, 1 part of the sulphur IS-60,0.5 part of promotor TBzTD-70,3 parts of accelerant MBT -80,1 part of promotor of part
DM.The ethylene propylene diene rubber includes that 125 DEG C of the Mooney viscosity ML (1+4) that mass fraction is 25 parts is 55~65 and ethylene contents
125 DEG C of the Mooney viscosity ML (1+4) that ethylene propylene diene rubber and mass fraction for 60%~70% are 25 parts is 75~85 and second
The ethylene propylene diene rubber that alkene content is 45%~55%.
A kind of preparation method of EPT rubber composition, comprising the following steps: take ethylene propylene diene rubber, zinc oxide and
Polyethylene glycol is added mixer and carries out pressurization mixing；When temperature reaches 30~35 DEG C, modified pyrophyllite, carbon black and paraffin is added
Oily row pressurization is kneaded；When temperature reaches 80~85 DEG C, be added sulphur IS-60, promotor TBzTD-70, accelerant MBT -80 and
Altax carries out pressurization mixing；When temperature reaches 90 DEG C~95 DEG C, the sizing material mixed is discharged on open mill and is returned
Glue is kneaded 1~2min, obtains EPT rubber composition through 150 DEG C of vulcanizing treatment 40min after bottom sheet.
Embodiment 2
A kind of EPT rubber composition, the raw material components including following mass fraction: 100 parts of ethylene-propylene-diene monomer
Glue, 5 parts of zinc oxide, 1 part of stearic acid, 3 parts of polyethylene glycol, 100 parts of modified pyrophyllite, 125 parts of N550 carbon black, 75
Paraffin oil, 0.5 part of the sulphur IS-60,1 part of promotor TBzTD-70,1.5 parts of accelerant MBT -80,3 parts of promotion of part
Agent DM.It is 55~65 and ethylene contains that the ethylene propylene diene rubber, which includes 125 DEG C of the Mooney viscosity ML (1+4) that mass fraction is 60 parts,
Ethylene propylene diene rubber that amount is 60%~70% and mass fraction be 40 parts 125 DEG C of Mooney viscosity ML (1+4) be 75~85 and
The ethylene propylene diene rubber that ethylene contents are 45%~55%.
A kind of preparation method of EPT rubber composition, comprising the following steps: take ethylene propylene diene rubber, zinc oxide and
Polyethylene glycol is added mixer and carries out pressurization mixing；When temperature reaches 30~35 DEG C, modified pyrophyllite, carbon black and paraffin is added
Oily row pressurization is kneaded；When temperature reaches 80~85 DEG C, be added sulphur IS-60, promotor TBzTD-70, accelerant MBT -80 and
Altax carries out pressurization mixing；When temperature reaches 90 DEG C~95 DEG C, the sizing material mixed is discharged on open mill and is returned
Glue is kneaded 1~2min, obtains EPT rubber composition through 165 DEG C of vulcanizing treatment 30min after bottom sheet.
Embodiment 3
A kind of EPT rubber composition, the raw material components including following mass fraction: 100 parts of ethylene-propylene-diene monomer
Glue, 5 parts of zinc oxide, 1 part of stearic acid, 3 parts of polyethylene glycol, 110 parts of modified pyrophyllite, 125 parts of N550 carbon black, 70
Paraffin oil, 0.8 part of the sulphur IS-60,0.5 part of promotor TBzTD-70,1.5 parts of accelerant MBT -80,3 parts of rush of part
Into agent DM.The ethylene propylene diene rubber includes that 125 DEG C of the Mooney viscosity ML (1+4) that mass fraction is 70 parts is 55~65 and ethylene
125 DEG C of the Mooney viscosity ML (1+4) that the ethylene propylene diene rubber and mass fraction that content is 60%~70% are 30 parts are 75~85
And the ethylene propylene diene rubber that ethylene contents are 45%~55%.
A kind of preparation method of EPT rubber composition, comprising the following steps: take ethylene propylene diene rubber, zinc oxide and
Polyethylene glycol is added mixer and carries out pressurization mixing；When temperature reaches 30~35 DEG C, modified pyrophyllite, carbon black and paraffin is added
Oily row pressurization is kneaded；When temperature reaches 80~85 DEG C, be added sulphur IS-60, promotor TBzTD-70, accelerant MBT -80 and
Altax carries out pressurization mixing；When temperature reaches 90 DEG C~95 DEG C, the sizing material mixed is discharged on open mill and is returned
Glue is kneaded 1~2min, obtains EPT rubber composition through 165 DEG C of vulcanizing treatment 35min after bottom sheet.
Embodiment 4
A kind of EPT rubber composition, the raw material components including following mass fraction: 150 parts of ethylene-propylene-diene monomer
Glue, 4 parts of zinc oxide, 1 part of stearic acid, 1 part of polyethylene glycol, 110 parts of modified pyrophyllite, 120 parts of N550 carbon black, 75
Paraffin oil, 0.5 part of the sulphur IS-60,1 part of promotor TBzTD-70,1 part of accelerant MBT -80,3 parts of promotor of part
DM.It is 55~65 and ethylene contains that the ethylene propylene diene rubber, which includes 125 DEG C of the Mooney viscosity ML (1+4) that mass fraction is 125 parts,
Ethylene propylene diene rubber that amount is 60%~70% and mass fraction be 25 parts 125 DEG C of Mooney viscosity ML (1+4) be 75~85 and
The ethylene propylene diene rubber that ethylene contents are 45%~55%.
A kind of preparation method of EPT rubber composition, comprising the following steps: take ethylene propylene diene rubber, zinc oxide and
Polyethylene glycol is added mixer and carries out pressurization mixing；When temperature reaches 30~35 DEG C, modified pyrophyllite, carbon black and paraffin is added
Oily row pressurization is kneaded；When temperature reaches 80~85 DEG C, be added sulphur IS-60, promotor TBzTD-70, accelerant MBT -80 and
Altax carries out pressurization mixing；When temperature reaches 90 DEG C~95 DEG C, the sizing material mixed is discharged on open mill and returns glue and mixes
1~2min is refined, obtains EPT rubber composition through 180 DEG C of vulcanizing treatment 20min after bottom sheet.
One, EPT rubber composition performance detection is tested:
With embodiment 2 and embodiment 3 for two groups of experimental examples, and two groups of comparative examples are set, wherein comparative example 1 and embodiment 2
EPT rubber composition compared to difference be to be not added with polyethylene glycol；The ethylene propylene diene rubber of comparative example 2 and embodiment 3
Composition is to be not added with modified pyrophyllite compared to difference, while adding 110 parts of kaolin/light calcium；Comparative example 3 and embodiment
3 EPT rubber composition is to be not added with polyethylene glycol compared to difference.To ternary prepared by experimental example and comparative example
EP rubbers composition carries out performance detection, and detection method is carried out according to GB/T 7759.1, and testing result is as shown in table 1.
1 EPT rubber composition performance detection experimental result of table
By 1 data result of table it is found that the present invention uses processing aid PEG-6000, with functional rubber and plastic reinforcing agent Create
E2 and used time have the function of significantly reducing compression set, and commonly use packing strengthening agent, such as kaolin, light calcium with other
And the used time is substantially to no effect；The present invention and with different Mooney viscosities, the EPDM of ethylene contents, is suitble to low pressure of the present invention to contract to explore
The raw rubber ratio of the rubber composition of permanent deformation, and take into account good high- and low-temperature resistance performance.
Two, EPT rubber composition embodiment of the present invention and existing sulfur cross-linking system, peroxide vulcanizing system
Performance comparison test experience, detection method carries out according to GB/T 7759.1, and concrete outcome is as shown in table 2.
2 EPT rubber composition of table and sulfur cross-linking system, the performance comparison result of peroxide vulcanizing system
The Cost comparisons of EPT rubber composition of the present invention and existing sulfur cross-linking system, peroxide vulcanizing system
It is as shown in table 3:
The Cost comparisons of 3 EPT rubber composition of table and existing sulfur cross-linking system, peroxide vulcanizing system tie
Fruit
By that can be known with table 2 and 3 data result of table, the heat resistance (especially 150 of EPT rubber composition of the present invention
DEG C), compression set be better than existing sulfur cross-linking system, close to peroxide vulcanizing system, other performances be can satisfy
The requirement of automobile cooling hose, comprehensive its cost, environment-friendly advantage, rubber composition of the invention have good reality
Application prospect.
Three, the contrasting detection of the rubber composition of other fillers of EPT rubber composition of the present invention and addition is real
It tests:
Choose the common processing aid benzoic acid for manufacturing the rubber composition of automobile cooling hose, common reinforcement is filled out
Fill agent kaolin, precipitated calcium carbonate makees variable as a comparison case, be formulated referring in particular to table 4 shown in；And the embodiment of the present invention 2 and reality
The ethylene-propylene-diene monomer composition of example 3 is applied as experimental example, testing result is as shown in table 5.
The component and content of 4 comparative example of table
The ethylene-propylene-diene monomer composition contrasting detection experimental result of 5 embodiment 2 of table and embodiment 3
Compression set is tested using the method A in GB/T 7759.1 in the present invention, can by 5 data result of table
Know, modified pyrophyllite Create E2 and processing aid polyethylene glycol PEG-6000 are significantly reduced in simultaneously used time tool and compress forever
One of which is used alone in long metamorphosis, or simultaneously used time, nothing are obvious with other similar packing strengthening agent, similar processing aid
Effect.
Claims (10)
1. a kind of EPT rubber composition, it is characterised in that: the raw material components including following mass fraction: 50~150 parts
Ethylene propylene diene rubber, 4~6 parts of zinc oxide, 0.5~1 part of stearic acid, 1~3 part of polyethylene glycol, 100~110 parts
Modified pyrophyllite, 120~130 parts of carbon black, 70~75 parts of paraffin oil, 0.5~1 part of sulphur and 2.5~7 parts of promotion
Agent.
2. EPT rubber composition according to claim 1, it is characterised in that: the ethylene propylene diene rubber includes door
The ethylene propylene diene rubber and/or Mooney viscosity ML that 125 DEG C of Buddhist nun's viscosity ML (1+4) are 55~65 and ethylene contents are 60%~70%
125 DEG C of (1+4) is for 75~85 and ethylene propylene diene rubber that ethylene contents are 45%~55%.
3. EPT rubber composition according to claim 2, it is characterised in that: the ethylene propylene diene rubber includes door
The ethylene propylene diene rubber and Mooney viscosity ML (1+ that 125 DEG C of Buddhist nun's viscosity ML (1+4) are 55~65 and ethylene contents are 60%~70%
4) ethylene propylene diene rubber that 125 DEG C are 75~85 and ethylene contents are 45%~55%.
4. EPT rubber composition according to claim 3, it is characterised in that: the Mooney viscosity ML (1+4) 125
It DEG C is 55~65 and 125 DEG C of ethylene propylene diene rubber that ethylene contents are 60%~70% and the Mooney viscosity ML (1+4) are 75
~85 and ethylene contents be 45%~55% the mass ratio of ethylene propylene diene rubber be 1~5:1.
5. EPT rubber composition according to claim 1, it is characterised in that: the carbon black is N550 carbon black.
6. EPT rubber composition according to claim 1, it is characterised in that: the sulphur is sulphur IS-60.
7. EPT rubber composition according to claim 1, it is characterised in that: the promotor includes promotor
The combination of one or more of IS-60, promotor TBzTD-70, accelerant MBT -80 and altax.
8. EPT rubber composition according to claim 7, it is characterised in that: the promotor includes following weight
The raw material components of number: 0.5~1 part of promotor IS-60,0.5~1 part of promotor TBzTD-70,1~3 part of promotor
MBT-80 and 1~3 part of altax.
9. a kind of preparation method of EPT rubber composition according to any one of claims 1 to 8, it is characterised in that: packet
It includes following steps: taking ethylene propylene diene rubber, zinc oxide and polyethylene glycol that mixer is added and carry out pressurization mixing；When temperature reaches 30
At~35 DEG C, modified pyrophyllite, carbon black and the pressurization of paraffin oil row is added and is kneaded；When temperature reaches 80~85 DEG C, sulphur is added
Pressurization mixing is carried out with promotor；When temperature reaches 90 DEG C~95 DEG C, the sizing material mixed is discharged on open mill and returns glue and mixes
It refines, obtains EPT rubber composition through vulcanizing treatment after bottom sheet.
10. the preparation method of EPT rubber composition according to claim 9, it is characterised in that: including following step
Rapid: the vulcanizing treatment condition is 150~180 DEG C of 20~40min of vulcanization.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114891305A (en) * | 2022-06-24 | 2022-08-12 | 青岛三祥科技股份有限公司 | Rubber composition and automobile air conditioner hose |
| CN115386172A (en) * | 2022-09-23 | 2022-11-25 | 江西奋发科技有限公司 | High-performance low-compression-set ethylene propylene diene monomer sealing rubber strip |
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Application publication date: 20181211 |