CN116265521A - Rubber composition and vulcanized rubber for aerator diaphragm, and preparation method and application thereof - Google Patents
Rubber composition and vulcanized rubber for aerator diaphragm, and preparation method and application thereof Download PDFInfo
- Publication number
- CN116265521A CN116265521A CN202111545525.XA CN202111545525A CN116265521A CN 116265521 A CN116265521 A CN 116265521A CN 202111545525 A CN202111545525 A CN 202111545525A CN 116265521 A CN116265521 A CN 116265521A
- Authority
- CN
- China
- Prior art keywords
- weight
- parts
- content
- rubber
- diene monomer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229920001971 elastomer Polymers 0.000 title claims abstract description 56
- 239000005060 rubber Substances 0.000 title claims abstract description 56
- 239000004636 vulcanized rubber Substances 0.000 title claims abstract description 47
- 239000000203 mixture Substances 0.000 title claims abstract description 39
- 238000005276 aerator Methods 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 229920002943 EPDM rubber Polymers 0.000 claims abstract description 42
- 239000006229 carbon black Substances 0.000 claims abstract description 35
- 239000005662 Paraffin oil Substances 0.000 claims abstract description 31
- 239000000945 filler Substances 0.000 claims abstract description 29
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 23
- -1 softener Substances 0.000 claims abstract description 21
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000005977 Ethylene Substances 0.000 claims abstract description 19
- 239000002270 dispersing agent Substances 0.000 claims abstract description 19
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 18
- 239000003381 stabilizer Substances 0.000 claims abstract description 18
- OJOWICOBYCXEKR-KRXBUXKQSA-N (5e)-5-ethylidenebicyclo[2.2.1]hept-2-ene Chemical group C1C2C(=C/C)/CC1C=C2 OJOWICOBYCXEKR-KRXBUXKQSA-N 0.000 claims abstract description 16
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 16
- 150000001993 dienes Chemical class 0.000 claims abstract description 14
- 230000003213 activating effect Effects 0.000 claims abstract description 6
- 229920001577 copolymer Polymers 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims description 41
- 238000000034 method Methods 0.000 claims description 26
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 15
- 239000012528 membrane Substances 0.000 claims description 15
- 239000012190 activator Substances 0.000 claims description 12
- 229920005989 resin Polymers 0.000 claims description 10
- 239000011347 resin Substances 0.000 claims description 10
- 238000004073 vulcanization Methods 0.000 claims description 9
- 239000011159 matrix material Substances 0.000 claims description 8
- 235000007586 terpenes Nutrition 0.000 claims description 8
- 239000004902 Softening Agent Substances 0.000 claims description 7
- 238000004898 kneading Methods 0.000 claims description 7
- 239000000178 monomer Substances 0.000 claims description 7
- 150000003505 terpenes Chemical class 0.000 claims description 7
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 6
- 239000000194 fatty acid Substances 0.000 claims description 6
- 229930195729 fatty acid Natural products 0.000 claims description 6
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 5
- 239000004698 Polyethylene Substances 0.000 claims description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 239000011630 iodine Substances 0.000 claims description 5
- 229910052740 iodine Inorganic materials 0.000 claims description 5
- 229920000573 polyethylene Polymers 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 229910052717 sulfur Inorganic materials 0.000 claims description 5
- 239000011593 sulfur Substances 0.000 claims description 5
- 239000001993 wax Substances 0.000 claims description 5
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 claims description 4
- 150000004665 fatty acids Chemical class 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 239000000344 soap Substances 0.000 claims description 4
- 239000005909 Kieselgur Substances 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical group [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 3
- 239000000395 magnesium oxide Substances 0.000 claims description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 3
- KUAZQDVKQLNFPE-UHFFFAOYSA-N thiram Chemical compound CN(C)C(=S)SSC(=S)N(C)C KUAZQDVKQLNFPE-UHFFFAOYSA-N 0.000 claims description 3
- 229960002447 thiram Drugs 0.000 claims description 3
- 239000005995 Aluminium silicate Substances 0.000 claims description 2
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 claims description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 2
- FZWLAAWBMGSTSO-UHFFFAOYSA-N Thiazole Chemical compound C1=CSC=N1 FZWLAAWBMGSTSO-UHFFFAOYSA-N 0.000 claims description 2
- 235000012211 aluminium silicate Nutrition 0.000 claims description 2
- 229920006272 aromatic hydrocarbon resin Polymers 0.000 claims description 2
- 229910001919 chlorite Inorganic materials 0.000 claims description 2
- 229910052619 chlorite group Inorganic materials 0.000 claims description 2
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 claims description 2
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 2
- 229910001649 dickite Inorganic materials 0.000 claims description 2
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 claims description 2
- 239000012990 dithiocarbamate Substances 0.000 claims description 2
- 125000005313 fatty acid group Chemical group 0.000 claims description 2
- 229910052900 illite Inorganic materials 0.000 claims description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 239000010445 mica Substances 0.000 claims description 2
- 229910052618 mica group Inorganic materials 0.000 claims description 2
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 2
- VGIBGUSAECPPNB-UHFFFAOYSA-L nonaaluminum;magnesium;tripotassium;1,3-dioxido-2,4,5-trioxa-1,3-disilabicyclo[1.1.1]pentane;iron(2+);oxygen(2-);fluoride;hydroxide Chemical compound [OH-].[O-2].[O-2].[O-2].[O-2].[O-2].[F-].[Mg+2].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[K+].[K+].[K+].[Fe+2].O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2 VGIBGUSAECPPNB-UHFFFAOYSA-L 0.000 claims description 2
- 229910052903 pyrophyllite Inorganic materials 0.000 claims description 2
- QAZLUNIWYYOJPC-UHFFFAOYSA-M sulfenamide Chemical compound [Cl-].COC1=C(C)C=[N+]2C3=NC4=CC=C(OC)C=C4N3SCC2=C1C QAZLUNIWYYOJPC-UHFFFAOYSA-M 0.000 claims description 2
- 239000000454 talc Substances 0.000 claims description 2
- 229910052623 talc Inorganic materials 0.000 claims description 2
- 239000010456 wollastonite Substances 0.000 claims description 2
- 229910052882 wollastonite Inorganic materials 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims 1
- 125000000217 alkyl group Chemical group 0.000 claims 1
- 150000004659 dithiocarbamates Chemical class 0.000 claims 1
- 239000005011 phenolic resin Substances 0.000 claims 1
- 229910052710 silicon Inorganic materials 0.000 claims 1
- 239000010703 silicon Substances 0.000 claims 1
- 238000004513 sizing Methods 0.000 claims 1
- 230000032683 aging Effects 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 16
- 239000000306 component Substances 0.000 description 11
- 238000012360 testing method Methods 0.000 description 11
- 239000010865 sewage Substances 0.000 description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- 238000011056 performance test Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 5
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 description 4
- 239000012752 auxiliary agent Substances 0.000 description 4
- 238000009472 formulation Methods 0.000 description 4
- DEQZTKGFXNUBJL-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)cyclohexanamine Chemical compound C1CCCCC1NSC1=NC2=CC=CC=C2S1 DEQZTKGFXNUBJL-UHFFFAOYSA-N 0.000 description 4
- 238000010074 rubber mixing Methods 0.000 description 4
- RKQOSDAEEGPRER-UHFFFAOYSA-L zinc diethyldithiocarbamate Chemical compound [Zn+2].CCN(CC)C([S-])=S.CCN(CC)C([S-])=S RKQOSDAEEGPRER-UHFFFAOYSA-L 0.000 description 4
- 235000021355 Stearic acid Nutrition 0.000 description 3
- 241000276425 Xiphophorus maculatus Species 0.000 description 3
- 238000005273 aeration Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 3
- 230000004224 protection Effects 0.000 description 3
- 239000008117 stearic acid Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- UAUDZVJPLUQNMU-UHFFFAOYSA-N Erucasaeureamid Natural products CCCCCCCCC=CCCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-UHFFFAOYSA-N 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- WITDFSFZHZYQHB-UHFFFAOYSA-N dibenzylcarbamothioylsulfanyl n,n-dibenzylcarbamodithioate Chemical compound C=1C=CC=CC=1CN(CC=1C=CC=CC=1)C(=S)SSC(=S)N(CC=1C=CC=CC=1)CC1=CC=CC=C1 WITDFSFZHZYQHB-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical group CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 description 2
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 description 2
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 description 2
- 239000010690 paraffinic oil Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- YKZUNWLMLRCVCW-UHFFFAOYSA-N 4-[2-(4-bicyclo[2.2.1]hept-2-enyl)ethyl]bicyclo[2.2.1]hept-2-ene Chemical compound C1CC(C2)C=CC21CCC1(C=C2)CC2CC1 YKZUNWLMLRCVCW-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000006750 UV protection Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
- DKVNPHBNOWQYFE-UHFFFAOYSA-N carbamodithioic acid Chemical compound NC(S)=S DKVNPHBNOWQYFE-UHFFFAOYSA-N 0.000 description 1
- CSNJTIWCTNEOSW-UHFFFAOYSA-N carbamothioylsulfanyl carbamodithioate Chemical compound NC(=S)SSC(N)=S CSNJTIWCTNEOSW-UHFFFAOYSA-N 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 125000002298 terpene group Chemical group 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the field of rubber, and discloses a rubber composition for an aerator diaphragm, vulcanized rubber, a preparation method and application thereof. The composition contains one or more of ethylene propylene diene monomer rubber, carbon black, natural lamellar siliceous filler, paraffin oil, dispersing agent, activating agent, antioxidant, softener, stabilizer, vulcanizing agent and accelerator; wherein the ethylene propylene diene monomer is a copolymer of ethylene, propylene and non-conjugated diene, and the non-conjugated diene is ethylidene-norbornene; and the content of the unconjugated diene is 2.3-10wt% and the content of the ethylene is 44-67wt% based on the total weight of the ethylene propylene diene monomer. The mechanical property of the vulcanized rubber is excellent, and the requirement of the aerator diaphragm on ageing resistance, hydrophilicity and durability and the excellent processing formability are met.
Description
Technical Field
The invention relates to the field of rubber, in particular to a rubber composition for an aerator diaphragm, vulcanized rubber, and a preparation method and application thereof.
Background
Aeration is an important link in the municipal sewage and industrial sewage treatment process, and not only generates oxygen required by biochemical reaction, but also achieves the purpose of fully mixing and contacting mud and water. The aerator is used as a core component, and the membrane of the aerator can be subjected to micropore forming by adopting a special process, so that the stability and the comprehensiveness of the contact of air flow and sewage are ensured. The problems occurring in the use process of the aerator are mostly caused by the defects of the membrane, so that the membrane can be said to directly influence the performance and the service life of the aerator. The material of the membrane material is Ethylene Propylene Diene Monomer (EPDM) material, and the EPDM membrane has the characteristics of aging resistance, high temperature resistance, corrosion resistance, acid and alkali resistance, ozone resistance, water vapor resistance, ultraviolet resistance and tearing resistance.
With the continuous new national regulations of the environmental protection industry, the investment of enterprises in environmental protection is gradually increased, and specific problems in the aeration process are also more concerned. The rubber material membrane in the membrane aerator has the problems of insufficient mechanical strength, particularly the problems of tearing, insufficient elongation and stretch-breaking after the membrane is perforated, and the phenomenon of blockage caused by dirt adhesion at the perforated position is easy to occur.
Therefore, the EPDM rubber membrane with excellent comprehensive performance and reasonable price is an important direction.
Disclosure of Invention
The invention aims to solve the problems of insufficient mechanical strength of rubber material diaphragms in diaphragm type aerators in the prior art, particularly the problems of easy tearing, insufficient elongation and stretch-breaking after diaphragm opening and easy blocking caused by adhering stains at the opening, and provides a rubber composition for the aerator diaphragm, vulcanized rubber, a preparation method and application thereof.
In order to achieve the above object, the first aspect of the present invention provides a rubber composition for an aerator membrane, wherein the composition contains one or more of ethylene propylene diene monomer rubber, carbon black, natural lamellar siliceous filler, paraffin oil, dispersant, activator, antioxidant, softener, stabilizer, vulcanizing agent and accelerator; wherein the ethylene propylene diene monomer is a copolymer of ethylene, propylene and non-conjugated diene, and the non-conjugated diene is ethylidene-norbornene; and the content of the unconjugated diene is 2.3-10wt% and the content of the ethylene is 44-67wt% based on the total weight of the ethylene propylene diene monomer.
In a second aspect, the present invention provides a process for producing a vulcanized rubber using the rubber composition described above, wherein the process comprises:
(1) Carrying out first mixing on an ethylene propylene diene monomer matrix, an activator, 1/2 carbon black, 1/2 paraffin oil, a stabilizer and a component A of a natural lamellar siliceous filler to obtain a primary masterbatch;
(2) The primary master batch is subjected to secondary mixing with a component B containing 1/2 carbon black, 1/2 paraffin oil, a dispersing agent, an antioxidant and a softening agent to obtain secondary master batch;
(3) Thirdly, mixing the two-stage masterbatch with a component C containing a vulcanizing agent and an accelerator to obtain final rubber;
(4) And vulcanizing the final rubber mixture to obtain vulcanized rubber.
In a third aspect, the present invention provides a vulcanized rubber prepared by the method described above.
In a fourth aspect, the present invention provides the use of the aforesaid vulcanizate as an aerator membrane material.
Through the technical scheme, the technical scheme provided by the invention has the following advantages:
(1) The ethylene propylene diene monomer with specific ethylene content and ethylidene-norbornene content can improve the comprehensive mechanical properties of vulcanized rubber on one hand; on the other hand, by adding a proper amount of auxiliary agents such as paraffin oil, softener and the like, the phenomenon of blockage caused by excessive stains attached to micropores of the material in the sewage is prevented;
(2) According to the vulcanized rubber provided by the invention, the characteristics of the EPDM rubber can be well exerted by each compounding system, and the prepared material has excellent mechanical properties, usability and appearance quality;
(3) The vulcanized rubber is obtained by a novel mixing method, the filler can be well dispersed uniformly, the mechanical property and the service performance of the prepared vulcanized rubber are excellent, and stains are less attached to the outer surface of the rubber material.
Detailed Description
The endpoints and any values of the ranges disclosed herein are not limited to the precise range or value, and are understood to encompass values approaching those ranges or values. For numerical ranges, one or more new numerical ranges may be found between the endpoints of each range, between the endpoint of each range and the individual point value, and between the individual point value, in combination with each other, and are to be considered as specifically disclosed herein.
As described above, the first aspect of the present invention provides a rubber composition for an aerator membrane, wherein the composition contains one or more of ethylene propylene diene monomer, carbon black, natural lamellar siliceous filler, paraffin oil, dispersant, activator, antioxidant, softener, stabilizer, vulcanizing agent and accelerator; wherein the ethylene propylene diene monomer is a copolymer of ethylene, propylene and non-conjugated diene, and the non-conjugated diene is ethylidene-norbornene; and the content of the unconjugated diene is 2.3-10wt% and the content of the ethylene is 44-67wt% based on the total weight of the ethylene propylene diene monomer.
The inventors of the present invention unexpectedly found that: the ethylene propylene diene monomer with specific ethylene structural unit content and ethylidene-norbornene content can improve the comprehensive mechanical properties of vulcanized rubber on one hand; on the other hand, by adding a proper amount of auxiliary agents such as paraffin oil, softener and the like, the phenomenon of blockage caused by excessive stains attached to micropores of the material in the sewage is prevented; in addition, the vulcanized rubber provided by the invention can well exert the characteristics of the EPDM rubber by each compounding system, and the prepared material has excellent mechanical properties, usability and appearance quality; in addition, the vulcanized rubber is obtained by a novel mixing method, wherein half of carbon black and paraffin oil are firstly mixed with a rubber matrix, natural flaky siliceous filler, a stabilizer and an activator to prepare the vulcanized rubber; then adding the other half of carbon black and paraffin oil, and dispersing agent, antioxidant, softener and the like; finally, adding a vulcanization system to prepare final rubber and vulcanizing. In the process, the filler can be well dispersed uniformly, and the prepared vulcanized rubber is smooth and glossy in appearance and excellent in mechanical property and use performance.
According to the invention, the content of the unconjugated diene is 4-9wt% and the content of the ethylene is 52-66wt% based on the total weight of the ethylene propylene diene monomer. In the invention, the ethylene content of ethylene propylene diene monomer and the ethylene-norbornene content are not too high, otherwise, the crosslinking degree of the material is too high, which is not beneficial to the improvement of comprehensive mechanical properties. In addition, in the invention, the specific ethylene propylene diene monomer is selected, and a proper amount of auxiliary agents such as paraffin oil, softener and the like are mixed to prevent the phenomenon of blockage caused by excessive stains in sewage adhering to micropores of the material.
According to the invention, the Mooney viscosity ML of the ethylene propylene diene monomer (1+4) The temperature of 125 ℃ is 30-65 ℃.
According to the present invention, preferably, the ethylene propylene diene monomer is selected from at least one of the following:
ethylene propylene diene monomer
4465, ethylene content 56wt%, ethylidene-norbornene content 4.1wt%, mooney viscosity ML (1+4) 48 at 125 ℃;
ethylene propylene diene monomer
4450, ethylene content 52wt%, ethylidene-norbornene content 4.3wt%, mooney viscosity ML (1+4) 125 ℃ is 46;
ethylene propylene diene monomer
3973, ethylene content 66% by weight, ethylidene-norbornene content 9% by weight, mooney viscosity ML (1+4) 125℃is 34.
According to the invention, the natural lamellar siliceous filler belongs to clay minerals which are rich in nature, has low price, can be directly used without modification, and can obtain vulcanized rubber with good properties by matching with other characteristics in the scheme of the invention. The natural lamellar siliceous filler is at least one selected from diatomite, sericite, wollastonite, mica powder, silica, rectorite, pyrophyllite powder, illite, chlorite, dickite, kaolin, montmorillonite and talcum powder; preferably, the natural layered siliceous filler is selected from diatomaceous earth and/or silica; more preferably, the natural layered siliceous filler is selected from diatomaceous earth SILLITIN N and/or silica GW-9. In the present invention, the fineness d of the natural lamellar siliceous filler 50 1-5 μm, BET specific surface area of 5-50m 2 /g; preferably, the fineness d of the natural lamellar siliceous filler 50 2-3 μm, BET specific surface area 9.6-11m 2 /g。
According to the invention, the content of carbon black is 20-90 parts by weight, the content of natural lamellar siliceous filler is 1-30 parts by weight, the content of paraffin oil is 5-80 parts by weight, the content of dispersing agent is 0-5 parts by weight, the content of activating agent is 0.5-10 parts by weight, the content of antioxidant is 0.1-5 parts by weight, the content of softening agent is 1-20 parts by weight, the content of stabilizing agent is 0.1-6 parts by weight, the content of vulcanizing agent is 0.1-5 parts by weight, and the content of accelerator is 0.1-6 parts by weight, relative to 100 parts by weight of the ethylene propylene diene monomer rubber matrix.
According to the present invention, it is preferable that the content of the carbon black is 40 to 90 parts by weight, the content of the natural lamellar siliceous filler is 1 to 20 parts by weight, the content of the paraffin oil is 20 to 50 parts by weight, the content of the dispersant is 1 to 5 parts by weight, the content of the activator is 1 to 10 parts by weight, the content of the antioxidant is 0.5 to 5 parts by weight, the content of the softener is 2 to 20 parts by weight, the content of the stabilizer is 0.5 to 5 parts by weight, the content of the vulcanizing agent is 0.3 to 5 parts by weight, and the content of the accelerator is 0.5 to 6 parts by weight, relative to 100 parts by weight of the ethylene propylene diene monomer rubber substrate.
According to the invention, the carbon black has an iodine absorption value of 10-100mg/kg, preferably 29-43mg/kg; the iodine absorption value of the carbon black is the mass of 1kg of carbon black absorbing iodine, and the unit is mg/kg, and is used for representing the specific surface area of the carbon black. In the present invention, the carbon black is furnace carbon black, for example, the carbon black is preferably N550 and/or N774.
According to the invention, the paraffinic oil has a kinematic viscosity of 10-100mm at 40 DEG C 2 S, preferably 32-94mm 2 S; the kinematic viscosity, i.e. the ratio of the dynamic viscosity of a fluid to the density of the fluid at the same temperature. Too high kinematic viscosity of paraffin oil can cause uneven dispersion of components in the system, and proper kinematic viscosity can also improve the smoothness and mechanical properties of the material surface. In the present invention, the paraffinic oil is preferably Sunpar150 and/or Sunpar 115.
According to the invention, the dispersant fatty acid amide and/or metal soap salt; the dispersion of the filler in the rubber matrix can be improved in general, which plays a lubricating role on the surface of the rubber compound. In the present invention, the dispersant is preferably erucamide TR 131 and/or oleamide TR 121.
According to the invention, the activator is a mixture of a metal oxide and a fatty acid or is a fatty acid metal soap salt; preferably, the activator may be zinc oxide and stearic acid; more preferably, the weight ratio of zinc oxide to stearic acid is (1-6): 1.
according to the invention, the antioxidant is at least one of hindered phenol antioxidants, preferably Irganox1076.
According to the present invention, the softener is selected from at least one of terpene resins, polyethylene waxes, aromatic hydrocarbon resins, and alkylphenol resins; preferably the softening agent is a terpene resin and/or a polyethylene wax; more preferably, the content weight ratio of terpene resin and polyethylene wax in the mixture is (0.2-1): 1. the softening point of the terpene resin is 20-150 ℃ and the average molecular weight is 650-1250; it is further preferred that the terpene resin has a softening point of 25 to 115 ℃.
According to the invention, the stabilizer is calcium oxide and/or magnesium oxide.
According to the invention, the vulcanizing agent is a sulfur donor; preferably, the vulcanizing agent IS ordinary sulfur S and/or oil-filled insoluble sulfur IS.
According to the present invention, the accelerator is at least one of a sulfenamide accelerator, a dithiocarbamate, a thiuram accelerator, a thiazole accelerator and a guanidine accelerator; preferably, the EPDM accelerator is compounded with a plurality of rubber accelerators in order to achieve a balance of properties and processes; more preferably, the accelerator is one or more of N-cyclohexyl-2-benzothiazole sulfenamide (CBS), 2-mercaptobenzothiazole (M-promoter), thiuram disulfide (TBzTD) and Zinc Diethyldithiocarbamate (ZDC).
In the rubber composition provided by the invention, the inventor finds that the natural lamellar siliceous filler with a specific dosage can be combined with the ethylene propylene diene monomer rubber matrix at a better interface under the actions of a stabilizer, a dispersant, a softener and the like, and can also adjust the processing and forming properties of the rubber material.
In the present invention, it is noted that each component may be stored independently or in a mixture.
In order to make the components of the obtained rubber compound more uniform and to have better performance after vulcanization, the invention provides a method for preparing vulcanized rubber by using the rubber composition, wherein the method comprises the following steps:
(1) Carrying out first mixing on an ethylene propylene diene monomer matrix, an activator, 1/2 carbon black, 1/2 paraffin oil, a stabilizer and a component A of a natural lamellar siliceous filler to obtain a primary masterbatch;
(2) The primary master batch is subjected to secondary mixing with a component B containing 1/2 carbon black, 1/2 paraffin oil, a dispersing agent, an antioxidant and a softening agent to obtain secondary master batch;
(3) Thirdly, mixing the two-stage masterbatch with a component C containing a vulcanizing agent and an accelerator to obtain final rubber;
(4) And vulcanizing the final rubber mixture to obtain vulcanized rubber.
According to the invention, carbon black and paraffin oil are added into rubber step by step, mixed with natural lamellar siliceous filler and other auxiliary agents, and vulcanized by adopting various combined accelerators, so that the obtained vulcanized rubber has more excellent appearance, mechanical properties and service performance.
According to the present invention, the conditions of the first kneading include: the temperature is 80-130 ℃ and the time is 3-12min; preferably, the conditions of the first mixing include: the temperature is 90-120 ℃ and the time is 4-12min; more preferably, the conditions of the first kneading include: the temperature is 105-110deg.C, and the time is 5-8min.
According to the present invention, the conditions for the second kneading include: the temperature is 90-130 ℃ and the time is 3-12min; preferably, the conditions of the second kneading include: the temperature is 100-130 ℃ and the time is 3-7min; more preferably, the conditions of the second kneading include: the temperature is 115-125 ℃ and the time is 4.5-6min.
According to the present invention, the conditions for the third kneading include: the temperature is not more than 130 ℃ and the time is 4-7min; preferably, the conditions of the third mixing include: the temperature is 100-105 ℃ and the time is 5-6min.
According to the invention, the vulcanization conditions include: the temperature is 150-170 ℃, the pressure is 10-20MPa, and the time is 25-50min; preferably, the vulcanization conditions include: the temperature is 155-160 ℃, the pressure is 15-16MPa, and the time is 28-30min.
According to the invention, the initial mixing temperature in the first mixing is 70-100 ℃, and the raw rubber plasticating time is 0.3-2min.
According to the present invention, it is preferable that the first mixing and the second mixing are performed in an internal mixer, and it is preferable that the rotational speeds of the internal mixer for the first mixing and the second mixing are each independently 30 to 90rpm.
According to the invention, preferably, the mixed rubber material obtained after the second mixing is firstly thinned and discharged into a sheet in a two-roll open mill, and is placed at the temperature of 0-50 ℃ for 3-12 hours to obtain the two-stage master batch.
The preparation method for preparing the vulcanized rubber is simple and reliable and is easy to popularize and apply.
Unless otherwise indicated, the pressures used in the present invention are gauge pressures.
As previously mentioned, a third aspect of the present invention provides a vulcanizate prepared by the process of the second aspect described above.
As previously mentioned, a fourth aspect of the present invention provides the use of a vulcanized rubber as described in the third aspect as an aerator membrane material.
The invention will be described in detail below by way of examples.
In the examples below, various commodities used below are commercially available without particular explanation.
The equipment conditions for preparing vulcanized rubber in the following examples and comparative examples are shown in Table 1.
The test instruments and test conditions of the vulcanized rubbers obtained in examples and comparative examples are shown in Table 2 and Table 3.
The chemical reagents used in the examples and comparative examples are commercially available, and are specifically as follows:
ethylene propylene diene monomer rubber:
4465, alkanin, ethylene content 56wt%, ethylidene-norbornene content 4.1wt%; />
4450, alkanginaceae, ethylene content 52wt%, ethylidene-norbornene content 4.3wt%; />
3973, alkanin, ethylene content 66% by weight, ethylidene-norbornene content 9.0% by weight;
carbon black: n550, kabot, USA, has an iodine absorption of 43mg/kg; n774, kabot, USA, has an iodine absorption of 29mg/kg;
natural platy siliceous fillers: diatomite SILLITIN N, huffman mining Co, germany, fineness d 50 3 μm and BET specific surface area of 11m 2 /g; silica GW-9, fujian Changtaiwantai mineral products Co., ltd, fineness d 50 2 μm and a BET specific surface area of 9.6m 2 /g；
Paraffin oil: sunpar150, sun Petroleum Co., USA, has a kinematic viscosity of 94mm 2 S@40 ℃; sunpar 115, sun Petroleum America, mount, has a kinematic viscosity of 32mm 2 /s@40℃；
Dispersing agent: erucamide TR 131, company stroktol, usa, melting point 79-85 ℃; oleamide TR 121, company stroktol, usa, melting point 70-76 ℃;
an activating agent: zinc oxide, stearic acid, weifang Hengfeng chemical Co., ltd;
an antioxidant: irganox1076, basff, germany, melting point 50-55 ℃;
terpene resin: TR-90S, softening point 90 ℃, content not less than 99% by weight, arizona chemical in America; t-60, softening point 60 ℃, content more than or equal to 99 weight percent, available from sea water industry Co., ltd;
polyethylene wax:
617A, honiswell, 180 viscosity at 140 ℃; />
629, honiswell, viscosity 200 at 140 ℃;
stabilizing agent: calcium oxide, analytical grade 98% of Shanghai Ala Biochemical technologies Co., ltd; magnesium oxide, analytical grade 98% of Shanghai Ala Biochemical technologies Co., ltd;
vulcanizing agent: sulfur, a constant chemical company in Weifang;
and (3) an accelerator: n-cyclohexyl-2-benzothiazole sulfenamide (CBS), shandong Yangguhua Talcum chemical Co., ltd; 2-mercaptobenzothiazole (M-promoting), shandong Yangguhua Tay chemical Co., ltd; dithiotetrabenzyl thiuram (TBzTD), a company of chemical industry, inc. Zinc Diethyldithiocarbamate (ZDC), a science and technology company of belkyo carboline.
The equipment conditions for preparing vulcanized rubber in the following examples and comparative examples are shown in Table 1.
The test instruments for the vulcanized rubbers obtained in the following examples and comparative examples are shown in Table 2.
The test conditions of the vulcanized rubbers obtained in the following examples and comparative examples are shown in Table 3.
The amounts of the components used in the following examples and comparative examples were all parts by weight (or parts), and the total amounts of the rubber compositions involved were the same and were 1200g.
Unless otherwise specified, room temperature described below represents 25.+ -. 3 ℃.
TABLE 1
TABLE 2
| Sequence number | Test instrument | Model of test instrument | Manufacturing factories |
| 1 | Universal testing machine | GT-AT-3000 | Taiwan high-speed rail Co Ltd |
| 2 | Hardness tester | GT-GS-MB | Taiwan high-speed rail Co Ltd |
TABLE 3 Table 3
Example 1
The rubber composition formulation is shown in Table 4.
The preparation process of the vulcanized rubber comprises the following steps:
(1) Firstly mixing an ethylene propylene diene monomer matrix, an activator, 1/2 carbon black, 1/2 paraffin oil, a stabilizer and a natural lamellar siliceous filler to obtain a primary masterbatch; specifically, ethylene propylene diene monomer is added into an internal mixer, the rotating speed is set to be 75rpm, the initial mixing temperature is 90 ℃, and the raw rubber plasticating time is 1min; adding an activating agent, 1/2 carbon black, 1/2 paraffin oil, a stabilizing agent and natural lamellar siliceous filler into the internal mixer for mixing at 105 ℃ for 7min to obtain a section of master batch;
(2) Carrying out second mixing on the primary master batch, the primary master batch containing 1/2 carbon black, 1/2 paraffin oil, a dispersing agent, an antioxidant and a softening agent to obtain a secondary master batch; specifically, adding the ingredients into an internal mixer, carrying out second mixing with the first-stage master batch for 5min at the mixing temperature of 120 ℃, discharging and standing for 5 hours to obtain a second-stage master batch;
(3) Thirdly, mixing the second-stage masterbatch with a vulcanizing agent and an accelerator to obtain final rubber; specifically, setting the rotation speed of an internal mixer at 60rpm, carrying out plasticating on the two-stage master batch for 0.5min at the initial mixing temperature of 45 ℃, adding a vulcanizing agent and an accelerator for carrying out third mixing, carrying out mixing at 105 ℃ for 5min, and discharging to obtain final rubber;
(4) And tabletting the final rubber mixing mill, putting the cut pieces into a flat vulcanizing machine for vulcanization, wherein the vulcanization temperature is 160 ℃, the vulcanization pressure is 15MPa, and the vulcanization time is 30min, so as to obtain a vulcanized rubber sample S1.
The vulcanized rubber sample S1 was subjected to a performance test, and the results are shown in Table 5.
Examples 2 to 6
A vulcanized rubber was prepared in the same manner as in example 1 except that: the rubber compositions employed were of different formulations and process parameters, see in particular Table 4.
The prepared vulcanized rubber samples S2-S6 were subjected to performance test, and the results are shown in Table 5.
Example 7
The rubber composition formulation of this example was the same as in example 1, and a vulcanized rubber was prepared by a method similar to that of example 1, except that:
in the process of preparing the primary master batch, the temperature of the first mixing is 125 ℃ and the time is 3.5min;
in the process of preparing the two-stage master batch, the temperature of the second mixing is 97 ℃ and the time is 10min;
in the process of preparing final rubber, the third rubber mixing time is 5min, the rubber discharging temperature is 130 ℃, the third rubber mixing temperature is 105 ℃, and the rubber discharging temperature refers to the preparation of rubber discharging after the temperature in the rubber mixing process is increased to more than 130 ℃.
A vulcanized rubber sample S7 was obtained.
The vulcanized rubber sample S7 was subjected to a performance test, and the results are shown in Table 5.
Comparative examples 1 to 2
A vulcanized rubber was prepared in the same manner as in example 1 except that: the rubber compositions employed were of different formulations and process parameters, see in particular Table 4.
The prepared vulcanized rubber samples CS1-CS2 were subjected to performance test, and the results are shown in Table 5.
Comparative example 3
A vulcanized rubber was prepared in the same manner as in example 1 except that: ethylene propylene diene monomer rubber is adopted
3973, ethylene content 66% by weight, ethylidene-norbornene content 9% by weight, see in particular Table 4.
The prepared vulcanized rubber sample CS3 was subjected to performance test, and the results are shown in Table 5.
Comparative example 4
A vulcanized rubber was prepared in the same manner as in example 1 except that: the carbon black and the paraffin oil are not mixed step by step, but are added at one time for mixing in the step (1); that is, "1/2 carbon black and 1/2 paraffin oil in step (1) and 1/2 carbon black and 1/2 paraffin oil in step (2)" in example 1 was modified to "carbon black and paraffin oil were added at once in step (1), the amount of addition was unchanged, only the order of addition was changed, and no stepwise addition was made.
The prepared vulcanized rubber sample CS4 was subjected to performance test, and the results are shown in Table 5.
TABLE 4 Table 4
Test case
The rubber compositions corresponding to the examples and the comparative examples are rolled on an open mill to prepare a 3-5mm rubber sheet, and then the rubber sheet is prepared on a flat vulcanizing machine to prepare a vulcanized rubber sheet with the thickness of 2.0mm, and the rubber sheet with the thickness of 2.0mm is subjected to cutting test on mechanical properties.
Attached stain test: the ethylene propylene diene monomer rubber materials obtained in the examples and the comparative examples are prepared into a 2mm diaphragm for an aeration device according to a manner well known to a person skilled in the art, and dense 1mm pores are formed on the diaphragm; when in operation, the product is inflated and diffused into sewage through the small holes. After 45 days of use, the membrane was observed for the presence of adhering stains. If no stain adhering phenomenon occurs, the mark is A; if the stains are slightly attached, but no small hole blocking phenomenon occurs, the stain is marked as B; if the attached stains appear, the phenomenon of blocking the small holes is marked as C.
The vulcanized rubber samples were subjected to performance testing, and the results are shown in Table 5.
TABLE 5
From the results, the components of the rubber composition can be better matched, so that the mechanical property and the service performance of the prepared vulcanized rubber are excellent, the requirements of the aerator diaphragm on ageing resistance, hydrophilicity and durability are met, the processing formability is excellent, and the rubber composition has a very wide industrial application prospect.
Comparative example 1, without the addition of the softener terpene resin, has poor overall performance relative to examples 1-7 due to the lack of dispersant, which is detrimental to the dispersion of the filler in the resin-containing system.
Comparative example 2, without the addition of natural platy siliceous filler, results in a combination of poor performance relative to examples 1-7 due to the lack of platy clay barrier to liquids or gases.
Comparative example 3 ethylene propylene diene monomer
3973, the overall properties are poor compared with examples 1 to 7, since the crosslinking degree of the prepared rubber is too high, which is unfavorable for the improvement of the overall mechanical properties.
In comparative example 4, the carbon black and paraffin oil were not added stepwise for mixing, the temperature rise of the rubber material was generally high, and the dispersibility after the carbon black was kneaded was to be improved, and the overall properties were poor as compared with examples 1 to 7.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, a number of simple variants of the technical solution of the invention are possible, including combinations of the individual technical features in any other suitable way, which simple variants and combinations should likewise be regarded as being disclosed by the invention, all falling within the scope of protection of the invention.
Claims (11)
1. The rubber composition for the aerator diaphragm is characterized by comprising one or more of ethylene propylene diene monomer rubber, carbon black, natural lamellar siliceous filler, paraffin oil, dispersing agent, activating agent, antioxidant, softener, stabilizer, vulcanizing agent and accelerator; wherein the ethylene propylene diene monomer is a copolymer of ethylene, propylene and non-conjugated diene, and the non-conjugated diene is ethylidene-norbornene; and the content of the unconjugated diene is 2.3-10wt% and the content of the ethylene is 44-67wt% based on the total weight of the ethylene propylene diene monomer.
2. The composition of claim 1, wherein the non-conjugated diene is present in an amount of 4 to 9wt% and the ethylene is present in an amount of 52 to 66wt%, based on the total weight of the ethylene propylene diene monomer;
and/or, the Mooney viscosity ML of the ethylene propylene diene monomer (1+4) The temperature of 125 ℃ is 30-65 ℃.
3. Composition according to claim 1 or 2, wherein the ethylene propylene diene monomer is selected from at least one of the following:
ethylene propylene diene monomer
4465, ethylene content 56wt%, ethylidene-norbornene content 4.1wt%, mooney viscosity ML (1+4) 48 at 125 ℃;
ethylene propylene diene monomer
4450 ethylene content 52wt%, ethylidene-norbornene contentIn an amount of 4.3% by weight, mooney viscosity ML (1+4) 125 ℃ is 46;
ethylene propylene diene monomer
3973, ethylene content 66% by weight, ethylidene-norbornene content 9% by weight, mooney viscosity ML (1+4) 125℃is 34.
4. The composition of claim 1, wherein the natural layered siliceous filler is selected from at least one of diatomaceous earth, sericite, wollastonite, mica powder, silica, rectorite, pyrophyllite powder, illite, chlorite, dickite, kaolin, montmorillonite, and talc;
and/or, relative to 100 parts by weight of the ethylene propylene diene monomer, the content of the carbon black is 20-90 parts by weight, the content of the natural lamellar silicon-containing filler is 1-30 parts by weight, the content of the paraffin oil is 5-80 parts by weight, the content of the dispersing agent is 0-5 parts by weight, the content of the activating agent is 0.5-10 parts by weight, the content of the antioxidant is 0.1-5 parts by weight, the content of the softening agent is 1-20 parts by weight, the content of the stabilizing agent is 0.1-6 parts by weight, the content of the vulcanizing agent is 0.1-5 parts by weight, and the content of the accelerator is 0.1-6 parts by weight.
5. The composition according to any one of claims 1 to 4, wherein the carbon black is contained in an amount of 40 to 90 parts by weight, the natural lamellar siliceous filler is contained in an amount of 1 to 20 parts by weight, the paraffin oil is contained in an amount of 20 to 50 parts by weight, the dispersant is contained in an amount of 1 to 5 parts by weight, the activator is contained in an amount of 1 to 10 parts by weight, the antioxidant is contained in an amount of 0.5 to 5 parts by weight, the softener is contained in an amount of 2 to 20 parts by weight, the stabilizer is contained in an amount of 0.5 to 5 parts by weight, the vulcanizing agent is contained in an amount of 0.3 to 5 parts by weight, and the accelerator is contained in an amount of 0.5 to 6 parts by weight, relative to 100 parts by weight of the ethylene propylene diene monomer.
6. A composition according to claim 1 or 5, wherein the carbon black has an iodine absorption value of from 10 to 100mg/kg;
and/or the kinematic viscosity of the paraffin oil at 40 ℃ is 10-100mm 2 /s；
And/or, the dispersant fatty acid amide and/or metal soap salt;
and/or the activator is a mixture of metal oxide and fatty acid or is fatty acid metal soap salt;
and/or the antioxidant is at least one of hindered phenol antioxidants;
and/or the softener is selected from at least one of terpene resin, polyethylene wax, aromatic hydrocarbon resin and alkyl phenol resin;
and/or the stabilizer is calcium oxide and/or magnesium oxide;
and/or, the vulcanizing agent is a sulfur donor;
and/or the accelerator is at least one of sulfenamide accelerators, dithiocarbamates, thiuram accelerators, thiazole accelerators and guanidine accelerators.
7. A process for preparing a vulcanized rubber using the rubber composition as defined in any one of claims 1 to 6, said process comprising:
(1) Carrying out first mixing on an ethylene propylene diene monomer matrix, an activator, 1/2 carbon black, 1/2 paraffin oil, a stabilizer and a component A of a natural lamellar siliceous filler to obtain a primary masterbatch;
(2) The primary master batch is subjected to secondary mixing with a component B containing 1/2 carbon black, 1/2 paraffin oil, a dispersing agent, an antioxidant and a softening agent to obtain secondary master batch;
(3) Thirdly, mixing the two-stage masterbatch with a component C containing a vulcanizing agent and an accelerator to obtain final rubber;
(4) And vulcanizing the final rubber mixture to obtain vulcanized rubber.
8. The method of claim 7, wherein the conditions of the first mixing and the second mixing are the same or different, each independently comprising: the mixing temperature is 50-130 ℃, and the mixing time is 3-20min;
preferably, the conditions of the second kneading include: the temperature is 90-130 ℃ and the time is 3-12min;
preferably, the conditions of the third mixing include: the temperature is not higher than 130 ℃ and the time is 4-7min;
and/or, the vulcanization conditions include: the temperature is 150-170 ℃, the pressure is 10-20MPa, and the time is 25-50min.
9. The method of claim 7, wherein the method further comprises: and (3) firstly carrying out thin pass and sheet discharge on the mixed sizing material obtained after the second mixing in a double-roll open mill, and standing at the temperature of 0-50 ℃ for 3-12 hours to obtain the two-stage master batch.
10. A vulcanized rubber prepared by the process of any one of claims 7-9.
11. Use of the vulcanized rubber of claim 10 as an aerator membrane material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111545525.XA CN116265521A (en) | 2021-12-16 | 2021-12-16 | Rubber composition and vulcanized rubber for aerator diaphragm, and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111545525.XA CN116265521A (en) | 2021-12-16 | 2021-12-16 | Rubber composition and vulcanized rubber for aerator diaphragm, and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116265521A true CN116265521A (en) | 2023-06-20 |
Family
ID=86743339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111545525.XA Pending CN116265521A (en) | 2021-12-16 | 2021-12-16 | Rubber composition and vulcanized rubber for aerator diaphragm, and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116265521A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004285088A (en) * | 2003-03-19 | 2004-10-14 | Sumitomo Chem Co Ltd | Rubber composition and its vulcanizate |
| CN107189238A (en) * | 2017-06-30 | 2017-09-22 | 南京利德东方橡塑科技有限公司 | A kind of new rubber composition, preparation method and its product for automobile water pipe |
| CN111234388A (en) * | 2018-11-28 | 2020-06-05 | 宁海建新胶管有限公司 | High-temperature-resistant low-pressure-change radiator water pipe material vulcanized by sulfur system and preparation method thereof |
| CN111423666A (en) * | 2020-05-27 | 2020-07-17 | 厦门麦丰密封件有限公司 | Ethylene propylene diene monomer rubber flushing valve diaphragm and preparation method thereof |
| CN111763360A (en) * | 2019-04-02 | 2020-10-13 | 中国石油化工股份有限公司 | Rubber composition, vulcanized rubber, and preparation method and application thereof |
| CN111849081A (en) * | 2020-08-04 | 2020-10-30 | 江苏环川环境工程有限公司 | Ethylene propylene diene monomer material and preparation method and application thereof |
-
2021
- 2021-12-16 CN CN202111545525.XA patent/CN116265521A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004285088A (en) * | 2003-03-19 | 2004-10-14 | Sumitomo Chem Co Ltd | Rubber composition and its vulcanizate |
| CN107189238A (en) * | 2017-06-30 | 2017-09-22 | 南京利德东方橡塑科技有限公司 | A kind of new rubber composition, preparation method and its product for automobile water pipe |
| CN111234388A (en) * | 2018-11-28 | 2020-06-05 | 宁海建新胶管有限公司 | High-temperature-resistant low-pressure-change radiator water pipe material vulcanized by sulfur system and preparation method thereof |
| CN111763360A (en) * | 2019-04-02 | 2020-10-13 | 中国石油化工股份有限公司 | Rubber composition, vulcanized rubber, and preparation method and application thereof |
| CN111423666A (en) * | 2020-05-27 | 2020-07-17 | 厦门麦丰密封件有限公司 | Ethylene propylene diene monomer rubber flushing valve diaphragm and preparation method thereof |
| CN111849081A (en) * | 2020-08-04 | 2020-10-30 | 江苏环川环境工程有限公司 | Ethylene propylene diene monomer material and preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 沈丽媛等: "《硫化剂含量及填料类型对三元乙丙橡胶性能的影响》", 《工程科技Ⅰ辑》, vol. 32, no. 5, 31 December 2016 (2016-12-31) * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6435013B2 (en) | tire | |
| CN1325546C (en) | Polymer composites comprising low molecular weight nitrile rubber | |
| EP3225657B1 (en) | Rubber composition, process for producing same, and tire | |
| WO2013047348A1 (en) | Rubber composition and tire | |
| CN112300440B (en) | Antioxidant composition, antioxidant masterbatch and rubber composition | |
| JP2009029961A (en) | Masterbatch for rubber composition and its manufacturing method | |
| US20140329963A1 (en) | Modified conjugated diene-based polymer, polymer composition, and process for producing modified conjugated diene-based polymer | |
| EP3943316A1 (en) | Studless tire rubber composition and studless tire using same | |
| KR20020084412A (en) | Terpolymers and Rubber Mixtures Containing Special Mineral Oils | |
| CN116265521A (en) | Rubber composition and vulcanized rubber for aerator diaphragm, and preparation method and application thereof | |
| JP2007039503A (en) | Rubber composition for tire | |
| US6433066B2 (en) | Rubber composition | |
| WO2007077787A1 (en) | Rubber composition for sidewall | |
| JPS6317097B2 (en) | ||
| US20040054060A1 (en) | Rubber composition | |
| CN116265520A (en) | Acetic acid resistant rubber composition, vulcanized rubber, preparation method and application thereof | |
| WO2012041804A2 (en) | Polymer compositions | |
| CN109233115B (en) | Rubber composition with high wear resistance, preparation method and application thereof | |
| JP3240770B2 (en) | Method for producing rubber composition | |
| JP2006037046A (en) | Rubber composition for tire containing scaly silica | |
| JP2008179718A (en) | Pneumatic tire | |
| EP3517569A1 (en) | Rubber composition, and tire | |
| JPS6160738A (en) | Rubber composition having excellent abrasion resistance and processability | |
| JP2005247969A (en) | Rubber composition for inner liner | |
| JP2023157850A (en) | Rubber composition for tires |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |