CN108976617A - Low sporadic EPDM rubber of a kind of soft and preparation method thereof - Google Patents
Low sporadic EPDM rubber of a kind of soft and preparation method thereof Download PDFInfo
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- CN108976617A CN108976617A CN201810828261.0A CN201810828261A CN108976617A CN 108976617 A CN108976617 A CN 108976617A CN 201810828261 A CN201810828261 A CN 201810828261A CN 108976617 A CN108976617 A CN 108976617A
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
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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
- C08L2312/00—Crosslinking
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Abstract
The invention discloses low sporadic EPDM rubbers of a kind of soft and preparation method thereof, belong to rubber materials.Aiming at the problem that existing rubber product needs additional addition adsorbent to be just able to achieve low smell, the present invention provides a kind of low sporadic EPDM rubbers of soft, the low sporadic EPDM rubber of the soft is prepared using EPDM raw rubber, the Third monomer of the EPDM raw rubber is DCPD, and the content of DCPD is lower than 5% in the EPDM raw rubber.The present invention is DCPD by the Third monomer of control EPDM raw rubber, and the content of DCPD is lower than 5% in the EPDM raw rubber, so that allowing realizes low smell.The present invention also provides a kind of preparation methods of the low sporadic EPDM rubber of soft simultaneously.
Description
Technical field
The invention belongs to rubber materials, specifically, being related to a kind of low sporadic EPDM rubber of soft and its preparation side
Method.
Background technique
Rubber be it is based on high-molecular compound, have good elastomeric material.It adds by raw material of raw rubber
The macromolecular elastomer for entering appropriate compounding agent and being formed.
With economic growth and social progress, the environmental protection of people, awareness of safety are stepped up, and household, travel requirement also exist
It steps up, the smell problem in indoor furniture, the vehicles also becomes focal point.Rubber material is indoor furniture, hands over
The logical essential accessory of tool, pass of the volatility of rubber material as air quality in influence indoor furniture, the vehicles
One of key factor has all formulated corresponding standard to air quality both at home and abroad, such as national standard GB/T 27630-2011 clear stipulaties
Benzene class and aldehydes organic concentration limitation requirement, Germany's VDA270 " test of automotive interior material " propose gas in in-vehicle air
Taste testing standard etc..
Chinese patent, publication number CN106883520A, publication date 20170623 disclose a kind of sealing of the low smell of environmental protection
Strip material, the raw material of the sealing strip material include: ethylene propylene diene rubber EPDM raw rubber 22-35%, carbon black 18-25%, stone
Wax oil 14-25%, white filler 15-26%, adsorbent 0.15-0.85%, zinc oxide 1.8-2.5%, other component 7-15%.
It first realizes low smell by the way that adsorbent is added.
In conclusion existing rubber product needs the additional adsorbent that is added just to be able to achieve low smell.
Summary of the invention
1, it to solve the problems, such as
Aiming at the problem that existing rubber product needs additional addition adsorbent to be just able to achieve low smell, the present invention provides
A kind of low sporadic EPDM rubber of soft, the low sporadic EPDM rubber of the soft are prepared into using EPDM raw rubber
It arrives, the Third monomer of the EPDM raw rubber is DCPD, and the content of DCPD is lower than 5% in the EPDM raw rubber.This hair
The bright Third monomer by controlling EPDM raw rubber is DCPD, and the content of DCPD is lower than 5% in the EPDM raw rubber,
Low smell is realized to allow.The present invention also provides a kind of preparation methods of the low sporadic EPDM rubber of soft simultaneously.
2, technical solution
To solve the above problems, the present invention adopts the following technical scheme that.
A kind of low sporadic EPDM rubber of soft, the Third monomer of the EPDM raw rubber are DCPD, the ternary
The content of DCPD is lower than 5% in the third raw rubber of second.
A kind of low sporadic EPDM rubber of soft, the raw material including following weight ratio are prepared:
Preferably, the Third monomer of the EPDM raw rubber is DCPD, the content of DCPD in the EPDM raw rubber
Lower than 5%.
Preferably, the plasticizer is paraffin oil.
Preferably, the crosslinking agent is dual-tert-butyl peroxy isopropyl base benzene.
Preferably, the anti-aging agent is made of anti-aging agent 445 and anti-aging agent ZMMBI, and the anti-aging agent is by 445 He of anti-aging agent
The weight ratio of anti-aging agent ZMMBI composition, the anti-aging agent 445 and the anti-aging agent ZMMBI are 1:(1~2) or 2:1.
A kind of preparation method of the low sporadic EPDM rubber of soft, includes the following steps:
(1) EPDM raw rubber is placed in mixer and is plasticated, anti-aging agent, zinc oxide and inner pattern releasing agent applicable is then added, the
It is primary to be kneaded, carbon black and plasticizer is then added, second of mixing mentions bolt, and dumping obtains being kneaded rubber master batch, and it is kneaded rubber master batch and parks,
It is subsequently placed on mill mixer roller, after rubber master batch packet roller surface is smooth, crosslinking agent and assistant crosslinking agent is added, it is complete to above-mentioned compounding agent
It after portion is mixed into mixing rubber master batch, operates on and turns refining, by the thin logical rear slice of sizing material, obtain film, film is parked, and progress is preforming, is obtained
Preforming sizing material；
(2) primary vulcanization: inserting mold for preforming sizing material in step (1), vulcanization, half tentatively vulcanized at
Product；
(3) vulcanize for second: the semi-finished product after tentatively vulcanizing in step (2) being put into heated-air circulation oven, secondary sulphur
Change, the rubber product after obtaining post-cure；
(4) it freezes deburring: the rubber product after post-cure in step (3) being subjected to deburring in freezing trimmer, is obtained
To the low sporadic EPDM rubber of the soft.
Preferably, the time of plasticating is 90-120s, and the first time mixing time is 70-80s, and described second mixed
The refining time is 100-110s, and it is 90-95s that the bolt time is mentioned after second of mixing, and second of melting temperature reaches 150-
At 160 DEG C, dumping.
Preferably, the temperature of the primary vulcanization is 160-170 DEG C.
Preferably, the temperature of second of vulcanization is 150-155 DEG C, and second of vulcanization time is 3-4h.
A kind of low sporadic EPDM rubber of soft, is prepared using above-mentioned any one preparation method.
Wherein, EPDM refers to that the abbreviation of English Ethylene Propylene Diene Monomer, DCPD refer to
Dicyclopentadiene, namely the abbreviation of English dicyclopentadiene.
3, beneficial effect
Compared with the prior art, the invention has the benefit that
(1) present invention is DCPD by the Third monomer of control EPDM raw rubber, and in the EPDM raw rubber
The content of DCPD is lower than 5%, the smell of EPDM raw rubber itself generation is avoided, so that allowing realizes low smell；
(2) in sulfidation, vulcanization can generate a large amount of odorous by-product, and the EPDM that the present invention uses is raw
Glue is that Third monomer is DCPD, and the content of DCPD is lower than 5% in the EPDM raw rubber, makes to contain inside EPDM raw rubber
Molecule double bond amount is few, while crosslinking agent is dual-tert-butyl peroxy isopropyl base benzene, and the two combines, and further reduces double bond to sulphur
The influence of change, is greatly reduced the generation of vulcanization by-product, thus reduce the generation of smell, the plasticizer energy that the present invention is added
Enough EPDM raw rubber and compounding agent is helped to dissolve each other and disperse, further decreases smell；
(3) using the low sporadic EPDM rubber of soft of the invention formula, can be achieved at the same time soft and it is low dissipate
Hair property (smell is low), the low sporadic EPDM rubber mooney viscosity of obtained soft of the invention is between 29-36, hardness (Shao
Family name A is between 32-40, oder levels 2；
(4) in preparation method of the invention, using the dual-tert-butyl peroxy isopropyl base benzene EPDM low with double bond content
Raw rubber vulcanization, is greatly reduced by-product in sulfidation, reduces smell, by post-cure, further make not hand over completely
The vulcanizing system of connection sufficiently reacts, and vapors away small molecule generating in sulfidation, easily causing smell.
Specific embodiment
The present invention is further described below combined with specific embodiments below.
Embodiment 1
A kind of low sporadic EPDM rubber material of soft, the raw material including following weight ratio:
The EPDM raw rubber of the present embodiment is the EPDM raw rubber that Third monomer is DCPD, such as EPDM raw rubber
The preferably 6160D EPDM raw rubber of A Lang Shinco production；
The carbon black of the present embodiment can be commercially available carbon black, such as can be preferably Cabot production N550 extrude charcoal fastly
It is black；
The plasticizer of the present embodiment is paraffin oil, and the present embodiment can be more preferably Shanghai Jinhai Special Lubricating Oil Factory
The environment-friendly plasticizer PW380 type of production；
The anti-aging agent of the present embodiment is the combination of amine and ZMMBI, for example the present embodiment can be further preferably conventional
High temperature resistant anti-aging agent 445 and ZMMBI (the two weight ratio is 1:1)；
Activated zinc oxide can be commercially available common activated zinc oxide, for example can be preferably by the bright work for containing chemical production
Property zinc oxide；
The crosslinking agent of the present embodiment is peroxide, and the present embodiment is more preferably dual-tert-butyl peroxy isopropyl base benzene；
The assistant crosslinking agent of the present embodiment is methacrylate (salt) monomer, is more preferably Sartomer in the present embodiment
The SR517 of production；
The inner pattern releasing agent applicable of the present embodiment is metallic soap based mixtures, and the present embodiment is more preferably that mould is got profit 935P.
A kind of soft low volatility EPDM rubber material produced using each raw material of said ratio, preparation method is such as
Under:
(1) rubber compounding: being placed in mixer the 120s that plasticates for EPDM raw rubber, and anti-aging agent, zinc oxide is then added
It is kneaded 75s with inner pattern releasing agent applicable, mentions bolt 95s after being eventually adding carbon black and environment-friendly plasticizer mixing 110s, melting temperature reaches 160 DEG C
Dumping is kneaded rubber master batch and parks not less than after for 24 hours, is placed on mill mixer roller, crosslinking agent is added after rubber master batch packet roller surface is smooth
And assistant crosslinking agent, it operates on and turns refining after above-mentioned compounding agent is all mixed into rubber master batch, logical beat sizing material is thin 2-3 and roll up and 3 triangle bags
Slice afterwards, film, which is parked, to be carried out after 12h preforming vulcanizing for molding.Compounding agent includes carbon black, plasticizer, anti-aging agent, activity
Zinc oxide, crosslinking agent, assistant crosslinking agent and inner pattern releasing agent applicable.
(2) primary vulcanization: sizing material preforming in step (1) is inserted into mold, is vulcanized at 170 DEG C on vulcanizer
The semi-finished product that 9min is tentatively vulcanized；
(3) vulcanize for second: the semi-finished product after tentatively vulcanizing in step (2) being sent into heated-air circulation oven, at 155 DEG C
Lower post-cure 3h, reacts not fully crosslinked vulcanizing system sufficiently, and vapor away it is being generated in sulfidation, easily cause gas
The small molecule of taste；
(4) freeze deburring: by the rubber product after post-cure in step (3) in freezing trimmer at subzero 65 DEG C into
Row deburring is examined after deburring, tests to obtain satisfactory soft low volatility EPDM rubber material.
It is as follows that resulting soft low volatility EPDM rubber material performance test data is prepared in the present embodiment:
Wherein, mooney viscosity (ML1+4 100), hardness (shore A), tensile strength, elongation are carried out by existing national standard
Test, oder levels are tested by national standard GB/T 27630-2011.It is worth noting that, primary vulcanization time and final
The thickness of obtained rubber material has relationship, and thickness is bigger, and the primary vulcanization time is longer, to prevent deficient sulphur and shapeless
The defects of.Such as according to thickness difference, the primary vulcanization time can be 1h, 2h etc..
Embodiment 2
A kind of low sporadic EPDM rubber material of soft, the raw material including following weight ratio:
The EPDM raw rubber of the present embodiment is the EPDM raw rubber that Third monomer is DCPD, such as EPDM raw rubber
The preferably 6160D EPDM raw rubber of A Lang Shinco production；
The carbon black of the present embodiment can be commercially available carbon black, such as can be preferably Cabot production N550 extrude charcoal fastly
It is black；
The plasticizer of the present embodiment is paraffin oil, and the present embodiment can be more preferably Shanghai Jinhai Special Lubricating Oil Factory
The environment-friendly plasticizer PW380 type of production；
The anti-aging agent of the present embodiment is the combination of amine and ZMMBI, for example the present embodiment can be further preferably conventional
High temperature resistant anti-aging agent 445 and ZMMBI (the two weight ratio is 1:2)；
Activated zinc oxide can be commercially available common activated zinc oxide, for example can be preferably by the bright work for containing chemical production
Property zinc oxide；
The crosslinking agent of the present embodiment is peroxide, and the present embodiment is more preferably dual-tert-butyl peroxy isopropyl base benzene；
The assistant crosslinking agent of the present embodiment is methacrylate (salt) monomer, is more preferably Sartomer in the present embodiment
The SR517 of production；
The inner pattern releasing agent applicable of the present embodiment is metallic soap based mixtures, and the present embodiment is more preferably that mould is got profit 935P.
The low sporadic EPDM rubber material of a kind of soft produced using each raw material of said ratio, preparation method is such as
Under:
(1) rubber compounding: being placed in mixer the 100s that plasticates for EPDM raw rubber 6160D, and anti-aging agent, oxygen is then added
Change zinc and inner pattern releasing agent applicable is kneaded 80s, mentions bolt 90s after being eventually adding carbon black and environment-friendly plasticizer mixing 100s, melting temperature reaches
155 DEG C of dumpings are kneaded rubber master batch and park not less than after for 24 hours, be placed on mill mixer roller, are added and hand over after rubber master batch packet roller surface is smooth
Join agent, assistant crosslinking agent, operate on and turn refining after above-mentioned compounding agent is all mixed into rubber master batch, logical beat sizing material is thin 2-3 and roll up and 3 triangles
Slice after packet, film, which is parked, to be carried out after 12h preforming vulcanizing for molding.Compounding agent includes carbon black, plasticizer, anti-aging agent, work
Property zinc oxide, crosslinking agent, assistant crosslinking agent and inner pattern releasing agent applicable.
(2) primary vulcanization: sizing material preforming in step (1) is inserted into mold, is vulcanized at 170 DEG C on vulcanizer
The semi-finished product that 10min is tentatively vulcanized；
(3) vulcanize for second: the semi-finished product after tentatively vulcanizing in step (2) being sent into heated-air circulation oven, at 150 DEG C
Lower post-cure 4h, reacts not fully crosslinked vulcanizing system sufficiently, and vapor away it is being generated in sulfidation, easily cause gas
The small molecule of taste；
(4) freeze deburring: by the rubber product after post-cure in step (3) in freezing trimmer at subzero 70 DEG C into
Row deburring is examined after deburring, tests to obtain satisfactory soft low volatility EPDM rubber material.
It is as follows that the low sporadic EPDM rubber material properties test data of resulting soft are prepared in the present embodiment:
| Mooney viscosity (ML1+4 100) | 25 |
| Hardness (shore A) | 32 |
| Tensile strength (Mpa) | 9 |
| Elongation (%) | 900 |
| Oder levels | 2 |
Wherein, mooney viscosity (ML1+4 100), hardness (shore A), tensile strength, elongation are carried out by existing national standard
Test, oder levels are tested by national standard GB/T 27630-2011.
Embodiment 3
A kind of low sporadic EPDM rubber material of soft, the raw material including following weight ratio:
The EPDM raw rubber of the present embodiment is the EPDM raw rubber that Third monomer is DCPD, such as EPDM raw rubber
The preferably 6160D EPDM raw rubber of A Lang Shinco production；
The carbon black of the present embodiment can be commercially available carbon black, such as can be preferably Cabot production N550 extrude charcoal fastly
It is black；
The plasticizer of the present embodiment is paraffin oil, and the present embodiment can be more preferably Shanghai Jinhai Special Lubricating Oil Factory
The environment-friendly plasticizer PW380 type of production；
The anti-aging agent of the present embodiment is the combination of amine and ZMMBI, for example the present embodiment can be further preferably conventional
High temperature resistant anti-aging agent 445 and ZMMBI (the two weight ratio is 2:1)；
Activated zinc oxide can be commercially available common activated zinc oxide, for example can be preferably by the bright work for containing chemical production
Property zinc oxide；
The crosslinking agent of the present embodiment is peroxide, and the present embodiment is more preferably dual-tert-butyl peroxy isopropyl base benzene；
The assistant crosslinking agent of the present embodiment is methacrylate (salt) monomer, is more preferably Sartomer in the present embodiment
The SR517 of production；
The inner pattern releasing agent applicable of the present embodiment is metallic soap based mixtures, and the present embodiment is more preferably that mould is got profit 935P.
A kind of soft low volatility EPDM rubber material produced using each raw material of said ratio, preparation method is such as
Under:
(1) rubber compounding: being placed in mixer the 100s that plasticates for EPDM raw rubber 6160D, and anti-aging agent, oxygen is then added
Change zinc and inner pattern releasing agent applicable is kneaded 70s, mentions bolt 90s after being eventually adding carbon black and environment-friendly plasticizer mixing 100s, melting temperature reaches
150 DEG C of dumpings are kneaded rubber master batch and park not less than after for 24 hours, be placed on mill mixer roller, are added and hand over after rubber master batch packet roller surface is smooth
Join agent, assistant crosslinking agent, operate on and turn refining after above-mentioned compounding agent is all mixed into rubber master batch, logical beat sizing material is thin 2-3 and roll up and 3 triangles
Slice after packet, film, which is parked, to be carried out after 12h preforming vulcanizing for molding.Compounding agent includes carbon black, plasticizer, anti-aging agent, work
Property zinc oxide, crosslinking agent, assistant crosslinking agent and inner pattern releasing agent applicable.
(2) primary vulcanization: sizing material preforming in step (1) is inserted into mold, is vulcanized at 170 DEG C on vulcanizer
The semi-finished product that 9min is tentatively vulcanized；
(3) vulcanize for second: the semi-finished product after tentatively vulcanizing in step (2) being sent into heated-air circulation oven, at 155 DEG C
Lower post-cure 3h, reacts not fully crosslinked vulcanizing system sufficiently, and vapor away it is being generated in sulfidation, easily cause gas
The small molecule of taste；
(4) freeze deburring: by the rubber product after post-cure in step (3) in freezing trimmer at subzero 60 DEG C into
Row deburring is examined after deburring, tests to obtain the low sporadic EPDM rubber material of satisfactory soft.
It is as follows that the low sporadic EPDM rubber material properties test data of resulting soft are prepared in the present embodiment:
Wherein, mooney viscosity (ML1+4 100), hardness (shore A), tensile strength, elongation are carried out by existing national standard
Test, oder levels are tested by national standard GB/T 27630-2011.
Embodiment 4
A kind of low sporadic EPDM rubber material of soft, the raw material including following weight ratio:
The EPDM raw rubber of the present embodiment is the EPDM raw rubber that Third monomer is DCPD, and the EPDM is raw
The content of DCPD is 5% in glue；
The carbon black of the present embodiment can be commercially available carbon black, such as can be preferably Cabot production N550 extrude charcoal fastly
It is black；
The plasticizer of the present embodiment is paraffin oil, and the present embodiment can be more preferably Shanghai Jinhai Special Lubricating Oil Factory
The environment-friendly plasticizer PW380 type of production；
The anti-aging agent of the present embodiment is the combination of amine and ZMMBI, for example the present embodiment can be further preferably conventional
High temperature resistant anti-aging agent 445 and ZMMBI (the two weight ratio is 1:1)；
Activated zinc oxide can be commercially available common activated zinc oxide, for example can be preferably by the bright work for containing chemical production
Property zinc oxide；
The crosslinking agent of the present embodiment is peroxide, and the present embodiment is more preferably dual-tert-butyl peroxy isopropyl base benzene；
The assistant crosslinking agent of the present embodiment is methacrylate (salt) monomer, is more preferably Sartomer in the present embodiment
The SR517 of production；
The inner pattern releasing agent applicable of the present embodiment is metallic soap based mixtures, and the present embodiment is more preferably that mould is got profit 935P.
The low sporadic EPDM rubber material of a kind of soft produced using each raw material of said ratio, preparation method is such as
Under:
(1) rubber compounding: being placed in mixer the 90s that plasticates for EPDM raw rubber 6160D, and anti-aging agent, oxygen is then added
Change zinc and inner pattern releasing agent applicable is kneaded 75s, mentions bolt 95s after being eventually adding carbon black and environment-friendly plasticizer mixing 110s, melting temperature reaches
155 DEG C of dumpings are kneaded rubber master batch and park not less than after for 24 hours, be placed on mill mixer roller, are added and hand over after rubber master batch packet roller surface is smooth
Join agent, assistant crosslinking agent, operate on and turn refining after above-mentioned compounding agent is all mixed into rubber master batch, logical beat sizing material is thin 2-3 and roll up and 3 triangles
Slice after packet, film, which is parked, to be carried out after 12h preforming vulcanizing for molding.Compounding agent includes carbon black, plasticizer, anti-aging agent, work
Property zinc oxide, crosslinking agent, assistant crosslinking agent and inner pattern releasing agent applicable.
(2) primary vulcanization: sizing material preforming in step (1) is inserted into mold, is vulcanized at 170 DEG C on vulcanizer
The semi-finished product that 10min is tentatively vulcanized；
(3) post-cure: the semi-finished product after tentatively vulcanizing in step (2) are sent into the good baking oven of hot air circulation,
Post-cure 4h at 150 DEG C, reacts not fully crosslinked vulcanizing system sufficiently, and vapors away generating in sulfidation, easy
Cause the small molecule of smell；
(4) freeze deburring: by the rubber product after post-cure in step (3) in freezing trimmer at subzero 60 DEG C into
Row deburring is examined after deburring, tests to obtain the low sporadic EPDM rubber material of satisfactory soft.
It is as follows that the low sporadic EPDM rubber material properties test data of resulting soft are prepared in the present embodiment:
| Mooney viscosity (ML1+4 100) | 29 |
| Hardness (shore A) | 36 |
| Tensile strength (Mpa) | 10 |
| Elongation (%) | 850 |
| Oder levels | 2 |
Wherein, mooney viscosity (ML1+4 100), hardness (shore A), tensile strength, elongation are carried out by existing national standard
Test, oder levels are tested by national standard GB/T 27630-2011.
Embodiment 5
The present embodiment and embodiment 4 are essentially the same, the difference is that, the content of DCPD is 3% in EPDM raw rubber.
It is as follows that the low sporadic EPDM rubber material performance test data of resulting soft is prepared in the present embodiment:
| Mooney viscosity (ML1+4 100) | 30 |
| Hardness (shore A) | 33 |
| Tensile strength (Mpa) | 9 |
| Elongation (%) | 830 |
| Oder levels | 2 |
Wherein, mooney viscosity (ML1+4 100), hardness (shore A), tensile strength, elongation are carried out by existing national standard
Test, oder levels are tested by national standard GB/T 27630-2011.
Claims (11)
1. a kind of low sporadic EPDM rubber of soft, which is characterized in that the Third monomer of the EPDM raw rubber is DCPD,
The content of DCPD is lower than 5% in the EPDM raw rubber.
2. a kind of low sporadic EPDM rubber of soft, which is characterized in that the raw material including following weight ratio is prepared:
3. the low sporadic EPDM rubber of soft according to claim 2, which is characterized in that the EPDM raw rubber
Third monomer is DCPD, and the content of DCPD is lower than 5% in the EPDM raw rubber.
4. the low sporadic EPDM rubber of soft according to claim 2 or 3, which is characterized in that the plasticizer is stone
Wax oil.
5. the low sporadic EPDM rubber of soft according to claim 2, which is characterized in that the crosslinking agent is double tertiary fourths
Base peroxy isopropyl base benzene.
6. the low sporadic EPDM rubber of soft according to claim 2 or 5, which is characterized in that the anti-aging agent is by preventing
The weight ratio of old agent 445 and anti-aging agent ZMMBI composition, the anti-aging agent 445 and the anti-aging agent ZMMBI are 1:(1~2) or 2:
1。
7. a kind of preparation method of the low sporadic EPDM rubber of soft, includes the following steps:
(1) EPDM raw rubber is placed in mixer and is plasticated, anti-aging agent, zinc oxide and inner pattern releasing agent applicable is then added, for the first time
It is kneaded, carbon black and plasticizer is then added, second of mixing mentions bolt, and dumping obtains being kneaded rubber master batch, is kneaded rubber master batch and parks, then
It is placed on mill mixer roller, after rubber master batch packet roller surface is smooth, crosslinking agent and assistant crosslinking agent is added, it is all mixed to above-mentioned compounding agent
Enter after being kneaded rubber master batch, operate on and turn refining, by sizing material it is thin it is logical after slice, obtain film, film is parked, carry out it is preforming, obtain it is pre- at
The sizing material of type；
(2) sizing material preforming in step (1) primary vulcanization: is inserted into mold, vulcanization, the semi-finished product tentatively vulcanized；
(3) vulcanize for second: the semi-finished product after tentatively vulcanizing in step (2) being put into heated-air circulation oven, post-cure obtains
Rubber product after to post-cure；
(4) it freezes deburring: the rubber product after post-cure in step (3) being subjected to deburring in freezing trimmer, obtains institute
State the low sporadic EPDM rubber of soft.
8. the preparation method of the low sporadic EPDM rubber of soft according to claim 7, which is characterized in that described when plasticating
Between be 90-120s, the first time mixing time be 70-80s, second of mixing time be 100-110s, described second
It is 90-95s that the bolt time is mentioned after secondary mixing, when second of melting temperature reaches 150-160 DEG C, dumping.
9. according to the preparation method of the low sporadic EPDM rubber of the soft of claim 7 or 8, which is characterized in that described
The temperature once vulcanized is 160-170 DEG C.
10. the preparation method of the low sporadic EPDM rubber of soft according to claim 7, which is characterized in that described second
The temperature of secondary vulcanization is 150-155 DEG C, and second of vulcanization time is 3-4h.
11. a kind of low sporadic EPDM rubber of soft, is prepared according to claim 7-10 any one preparation method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810828261.0A CN108976617A (en) | 2018-07-25 | 2018-07-25 | Low sporadic EPDM rubber of a kind of soft and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810828261.0A CN108976617A (en) | 2018-07-25 | 2018-07-25 | Low sporadic EPDM rubber of a kind of soft and preparation method thereof |
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| CN111040317A (en) * | 2019-12-27 | 2020-04-21 | 深圳市华永锋科技有限公司 | Material of anti-pollution mold, preparation method of material and sealing ring prepared from material |
| CN115028927A (en) * | 2022-05-30 | 2022-09-09 | 安徽中鼎密封件股份有限公司 | Ultralow-hardness high-resilience low-deformation ethylene propylene diene monomer material and preparation method thereof |
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| CN111040317A (en) * | 2019-12-27 | 2020-04-21 | 深圳市华永锋科技有限公司 | Material of anti-pollution mold, preparation method of material and sealing ring prepared from material |
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