CN111825923A - EPDM rubber particle and preparation method thereof - Google Patents
EPDM rubber particle and preparation method thereof Download PDFInfo
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- CN111825923A CN111825923A CN202010770294.1A CN202010770294A CN111825923A CN 111825923 A CN111825923 A CN 111825923A CN 202010770294 A CN202010770294 A CN 202010770294A CN 111825923 A CN111825923 A CN 111825923A
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- 229920002943 EPDM rubber Polymers 0.000 title claims abstract description 70
- 239000002245 particle Substances 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title abstract description 15
- -1 polypropylene Polymers 0.000 claims abstract description 29
- 238000002156 mixing Methods 0.000 claims abstract description 27
- 239000004743 Polypropylene Substances 0.000 claims abstract description 22
- 239000012745 toughening agent Substances 0.000 claims abstract description 18
- 229920001155 polypropylene Polymers 0.000 claims abstract description 17
- 238000004073 vulcanization Methods 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 14
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 14
- 239000000945 filler Substances 0.000 claims abstract description 13
- 238000004132 cross linking Methods 0.000 claims abstract description 12
- 229920001707 polybutylene terephthalate Polymers 0.000 claims abstract description 12
- XTJCJAPNPGGFED-UHFFFAOYSA-N 2-hydroxyethylazanium;2-sulfanylacetate Chemical compound [NH3+]CCO.[O-]C(=O)CS XTJCJAPNPGGFED-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 229920001971 elastomer Polymers 0.000 claims description 59
- 239000005060 rubber Substances 0.000 claims description 59
- 239000004636 vulcanized rubber Substances 0.000 claims description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 17
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 14
- 239000003086 colorant Substances 0.000 claims description 12
- YYGNTYWPHWGJRM-UHFFFAOYSA-N (6E,10E,14E,18E)-2,6,10,15,19,23-hexamethyltetracosa-2,6,10,14,18,22-hexaene Chemical compound CC(C)=CCCC(C)=CCCC(C)=CCCC=C(C)CCC=C(C)CCC=C(C)C YYGNTYWPHWGJRM-UHFFFAOYSA-N 0.000 claims description 11
- BHEOSNUKNHRBNM-UHFFFAOYSA-N Tetramethylsqualene Natural products CC(=C)C(C)CCC(=C)C(C)CCC(C)=CCCC=C(C)CCC(C)C(=C)CCC(C)C(C)=C BHEOSNUKNHRBNM-UHFFFAOYSA-N 0.000 claims description 11
- PRAKJMSDJKAYCZ-UHFFFAOYSA-N dodecahydrosqualene Natural products CC(C)CCCC(C)CCCC(C)CCCCC(C)CCCC(C)CCCC(C)C PRAKJMSDJKAYCZ-UHFFFAOYSA-N 0.000 claims description 11
- 229940031439 squalene Drugs 0.000 claims description 11
- TUHBEKDERLKLEC-UHFFFAOYSA-N squalene Natural products CC(=CCCC(=CCCC(=CCCC=C(/C)CCC=C(/C)CC=C(C)C)C)C)C TUHBEKDERLKLEC-UHFFFAOYSA-N 0.000 claims description 11
- 238000005520 cutting process Methods 0.000 claims description 10
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 9
- 238000005469 granulation Methods 0.000 claims description 9
- 230000003179 granulation Effects 0.000 claims description 9
- 238000005096 rolling process Methods 0.000 claims description 9
- 229910052717 sulfur Inorganic materials 0.000 claims description 9
- 239000011593 sulfur Substances 0.000 claims description 9
- 239000000377 silicon dioxide Substances 0.000 claims description 7
- 239000011787 zinc oxide Substances 0.000 claims description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- 239000006229 carbon black Substances 0.000 claims description 6
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- QFFVPLLCYGOFPU-UHFFFAOYSA-N barium chromate Chemical compound [Ba+2].[O-][Cr]([O-])(=O)=O QFFVPLLCYGOFPU-UHFFFAOYSA-N 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 11
- 230000032683 aging Effects 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 7
- 239000004033 plastic Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 235000012239 silicon dioxide Nutrition 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000009863 impact test Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 150000003254 radicals Chemical class 0.000 description 2
- CWERGRDVMFNCDR-UHFFFAOYSA-N thioglycolic acid Chemical compound OC(=O)CS CWERGRDVMFNCDR-UHFFFAOYSA-N 0.000 description 2
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 1
- 229920001730 Moisture cure polyurethane Polymers 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 230000006750 UV protection Effects 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000010920 waste tyre Substances 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
- 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
-
- 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
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention provides EPDM rubber particles which are prepared from the following raw materials in parts by weight: 100 parts of ethylene propylene diene monomer, 10-20 parts of polypropylene, 5-15 parts of toughening agent, 40-60 parts of filler, 1-5 parts of vulcanizing agent and 5-10 parts of reinforcing agent, wherein the toughening agent comprises the following components in parts by weight: 1-5 parts of mercaptoacetic acid monoethanolamine and 2-5 parts of polybutylene terephthalate, and the invention also provides a preparation method of EPDM rubber particles, which comprises the following steps: step S1: mixing the materials; step S2: vulcanization crosslinking; step S3: and (6) granulating. The invention provides EPDM rubber particles with high tensile strength, high wear resistance and good elasticity and a preparation method thereof.
Description
Technical Field
The invention relates to the technical field of plastic track filling particles, in particular to EPDM rubber particles and a preparation method thereof.
Background
The plastic track is also named as all-weather track for track and field sports and consists of polyurethane prepolymer, mixed polyether, waste tyre rubber, EPDM rubber grain or PU grain, pigment, assistant and stuffing. The plastic track is made of materials such as polyurethane, EPDM rubber and the like, has certain elasticity and color, has certain ultraviolet resistance and aging resistance, and is an internationally recognized best all-weather outdoor playground floor material.
The existing EPDM (ethylene propylene diene monomer) particles are generally prepared from ethylene propylene diene monomer, the tensile strength, the wear resistance and the elasticity of the EPDM particles are not excellent enough, the ageing resistance of the existing ethylene propylene diene monomer particles is not high enough, the service life of the existing ethylene propylene diene monomer particles is short, a plastic track needs to be shoveled and re-paved after being used for 2-3 years, the paving cost is high, and a large amount of manpower and material resources are consumed.
Therefore, it is necessary to research an EPDM rubber particle having high tensile strength, high wear resistance, good elasticity, high aging resistance, and long life, and a method for preparing the same.
Disclosure of Invention
The invention aims to provide EPDM rubber particles with high tensile strength, high wear resistance, good elasticity, high ageing resistance and long service life and a preparation method thereof.
The technical purpose of the invention is realized by the following technical scheme:
the EPDM rubber particle is prepared from the following raw materials in parts by weight: 100 parts of ethylene propylene diene monomer, 10-20 parts of polypropylene, 5-15 parts of toughening agent, 40-60 parts of filler, 1-5 parts of vulcanizing agent and 5-10 parts of reinforcing agent, wherein the toughening agent comprises the following components in parts by weight: 1-5 parts of mercaptoacetic acid monoethanolamine and 2-5 parts of polybutylene terephthalate.
As a further arrangement of the invention, the toughening agent also comprises 2-5 parts of polysqualene.
As a further setting of the invention, the filling material is one or more of calcium carbonate, white carbon black and zinc oxide.
As a further setting of the invention, the vulcanizing agent is sulfur.
As a further configuration of the invention, the reinforcing agent is one or more of carbon black, graphene and silica.
As a further setting of the invention, the rubber paint also comprises 1-5 parts of a colorant, wherein the colorant is one of rubberscarlet, permanent yellow, phthalocyanine green and phthalocyanine blue.
The invention also provides a preparation method of the EPDM rubber particles, which comprises the following steps:
step S1: mixing materials: uniformly mixing 100 parts of ethylene propylene diene monomer, 10-20 parts of polypropylene, 1-5 parts of mercaptoacetic acid monoethanolamine serving as a toughening agent, 2-5 parts of polybutylene terephthalate, 40-60 parts of a filler, 1-5 parts of a vulcanizing agent, 5-10 parts of a reinforcing agent and 1-5 parts of a coloring agent, and putting into an internal mixer for internal mixing to obtain raw internal mixing rubber;
step S2: and (3) vulcanization crosslinking: putting the banburying raw rubber into an open mill again, rolling the banburying raw rubber into sheet raw rubber, and then placing the sheet raw rubber into a vulcanizing machine to be heated and vulcanized for 1-2 hours;
step S3: and (3) granulation: and cutting the vulcanized rubber into dumbbell-shaped flaky vulcanized rubber, and granulating to obtain the EPDM rubber particles.
As a further configuration of the invention, the temperature of the vulcanization in step S2 is 140 ℃ to 150 ℃.
The invention has the beneficial effects that:
1. according to the invention, the ethylene propylene diene monomer and the polypropylene are used as raw materials, in the preparation process of rubber particles, the polypropylene plastic particles are dispersed as a dispersion phase and are dispersed in a continuous phase of the ethylene propylene diene monomer to form a sea-island structure, so that the wear resistance and toughness of the EPDM rubber particles can be effectively improved, when the EPDM rubber particles are stressed and compressed, the polypropylene dispersion property and the continuous phase of the ethylene propylene diene monomer slide, the harder polypropylene induces the ethylene propylene diene monomer to generate elastic deformation to provide stronger resilience, the resilience of the rubber particles is effectively improved, the thioglycolic acid monoethanolamine in the toughening agent is in chain-breaking crosslinking with the EPDM and PP in vulcanization, the compactness of chain-segment crosslinking in the generated ethylene propylene diene monomer is improved, the motion capability of a molecular chain is reduced, the material is integrally tightened, and the tensile strength and elasticity of the ethylene propylene diene monomer particles are effectively improved.
2. The toughening agent is also added with the polybutylene terephthalate, and the polybutylene terephthalate can improve the dispersion uniformity of PP in EPDM during the vulcanization reaction of PP and EPDM, improve the uniformity of polypropylene in the dispersed island structure of ethylene propylene diene monomer, and effectively improve the impact force absorption capacity of uniform tiny cracks formed by the impact of rubber particles, thereby effectively improving the toughness of the rubber particles.
3. The squalene is added, the squalene can improve the movement capacity of an EPDM molecular chain, the collision probability of free radicals is improved, the vulcanization efficiency is effectively improved, the rubber particles are refined and dispersed more uniformly, the contact area of PP and EPDM rubber is increased, more micro cracks can be induced to generate absorption energy in the stress deformation process, the toughness of the rubber particles is further improved, the rheology and the processing performance of the EPDM rubber can be improved during vulcanization of the squalene, the wear resistance is improved, meanwhile, the squalene can react with the rest free radicals in the EPDM and the PP, the reaction degree of the reaction is improved, the saturation degree in the rubber particles is improved, the anti-aging performance is effectively improved, the squalene can absorb ultraviolet rays, the anti-ultraviolet ray oxidation capacity of the rubber particles is improved, and the service life of a rubber runway made of the rubber particles is prolonged.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
First, an embodiment
Example 1
The invention provides a preparation method of EPDM rubber particles, which comprises the following steps:
step S1: mixing materials: uniformly mixing 100 parts of ethylene propylene diene monomer, 10 parts of polypropylene, 1 part of mercaptoacetic acid monoethanolamine serving as a toughening agent, 2 parts of polybutylene terephthalate, 2 parts of squalene, 40 parts of calcium carbonate serving as a filler, 1 part of sulfur serving as a vulcanizing agent, 5 parts of carbon black serving as a reinforcing agent and 1 part of scarlet rubber serving as a coloring agent, and banburying the mixture in a banbury mixer to obtain banburying raw rubber;
step S2: and (3) vulcanization crosslinking: putting the banburying raw rubber into an open mill again, rolling the banburying raw rubber into sheet raw rubber, and then putting the sheet raw rubber into a vulcanizing machine, heating the sheet raw rubber to 140 ℃ and vulcanizing the sheet raw rubber for 1 hour;
step S3: and (3) granulation: and cutting the vulcanized rubber into dumbbell-shaped flaky vulcanized rubber, and granulating to obtain the EPDM rubber particles.
Example 2
The invention provides a preparation method of EPDM rubber particles, which comprises the following steps:
step S1: mixing materials: uniformly mixing 100 parts of ethylene propylene diene monomer, 20 parts of polypropylene, 5 parts of mercaptoacetic acid monoethanolamine serving as a toughening agent, 5 parts of polybutylene terephthalate, 5 parts of squalene, 60 parts of white carbon black serving as a filler, 5 parts of sulfur serving as a vulcanizing agent, 10 parts of graphene serving as a reinforcing agent and 5 parts of permanent yellow serving as a coloring agent, and putting the mixture into an internal mixer for internal mixing to obtain internal mixing raw rubber;
step S2: and (3) vulcanization crosslinking: putting the banburying raw rubber into an open mill again, rolling the banburying raw rubber into sheet raw rubber, and then putting the sheet raw rubber into a vulcanizing machine, heating to 150 ℃ and vulcanizing for 2 hours;
step S3: and (3) granulation: and cutting the vulcanized rubber into dumbbell-shaped flaky vulcanized rubber, and granulating to obtain the EPDM rubber particles.
Example 3
The invention provides a preparation method of EPDM rubber particles, which comprises the following steps:
step S1: mixing materials: uniformly mixing 100 parts of ethylene propylene diene monomer, 25 parts of polypropylene, 3 parts of mercaptoacetic acid monoethanolamine serving as a toughening agent, 4 parts of polybutylene terephthalate, 4 parts of squalene, 50 parts of zinc oxide serving as a filler, 3 parts of sulfur serving as a vulcanizing agent, 8 parts of silicon dioxide serving as a reinforcing agent and 4 parts of phthalocyanine green serving as a coloring agent, and banburying in a banbury mixer to obtain banburying raw rubber;
step S2: and (3) vulcanization crosslinking: putting the banburying raw rubber into an open mill again, rolling to form sheet raw rubber, and then putting the sheet raw rubber into a vulcanizing machine, heating to 145 ℃ and vulcanizing for 1.5 hours;
step S3: and (3) granulation: and cutting the vulcanized rubber into dumbbell-shaped flaky vulcanized rubber, and granulating to obtain the EPDM rubber particles.
Example 4
The invention provides a preparation method of EPDM rubber particles, which comprises the following steps:
step S1: mixing materials: uniformly mixing 100 parts of ethylene propylene diene monomer, 25 parts of polypropylene, 4 parts of toughening agent polybutylene terephthalate, 4 parts of squalene, 50 parts of filler zinc oxide, 3 parts of vulcanizing agent sulfur, 8 parts of reinforcing agent silicon dioxide and 4 parts of colorant phthalocyanine blue, and banburying in a banbury mixer to obtain banbury raw rubber;
step S2: and (3) vulcanization crosslinking: putting the banburying raw rubber into an open mill again, rolling to form sheet raw rubber, and then putting the sheet raw rubber into a vulcanizing machine, heating to 145 ℃ and vulcanizing for 1.5 hours;
step S3: and (3) granulation: and cutting the vulcanized rubber into dumbbell-shaped flaky vulcanized rubber, and granulating to obtain the EPDM rubber particles.
Example 5
The invention provides a preparation method of EPDM rubber particles, which comprises the following steps:
step S1: mixing materials: uniformly mixing 100 parts of ethylene propylene diene monomer, 25 parts of polypropylene, 3 parts of mercaptoacetic acid monoethanolamine serving as a toughening agent, 4 parts of squalene, 50 parts of zinc oxide serving as a filler, 3 parts of sulfur serving as a vulcanizing agent, 8 parts of silicon dioxide serving as a reinforcing agent and 4 parts of phthalocyanine green serving as a coloring agent, and banburying in a banbury mixer to obtain banbury raw rubber;
step S2: and (3) vulcanization crosslinking: putting the banburying raw rubber into an open mill again, rolling to form sheet raw rubber, and then putting the sheet raw rubber into a vulcanizing machine, heating to 145 ℃ and vulcanizing for 1.5 hours;
step S3: and (3) granulation: and cutting the vulcanized rubber into dumbbell-shaped flaky vulcanized rubber, and granulating to obtain the EPDM rubber particles.
Example 6
The invention provides a preparation method of EPDM rubber particles, which comprises the following steps:
step S1: mixing materials: uniformly mixing 100 parts of ethylene propylene diene monomer, 25 parts of polypropylene, 3 parts of toughener mercaptoacetic acid monoethanolamine, 4 parts of polybutylene terephthalate, 50 parts of filler zinc oxide, 3 parts of vulcanizing agent sulfur, 8 parts of reinforcing agent silicon dioxide and 4 parts of colorant phthalocyanine green, and putting the mixture into an internal mixer for internal mixing to obtain internal mixing raw rubber;
step S2: and (3) vulcanization crosslinking: putting the banburying raw rubber into an open mill again, rolling to form sheet raw rubber, and then putting the sheet raw rubber into a vulcanizing machine, heating to 145 ℃ and vulcanizing for 1.5 hours;
step S3: and (3) granulation: and cutting the vulcanized rubber into dumbbell-shaped flaky vulcanized rubber, and granulating to obtain the EPDM rubber particles.
Example 7
The invention provides a preparation method of EPDM rubber particles, which comprises the following steps:
step S1: mixing materials: uniformly mixing 100 parts of ethylene propylene diene monomer, 25 parts of polypropylene, 50 parts of filler zinc oxide, 3 parts of vulcanizing agent sulfur, 8 parts of reinforcing agent silicon dioxide and 4 parts of colorant phthalocyanine green, and banburying in a banbury mixer to obtain banburying raw rubber;
step S2: and (3) vulcanization crosslinking: putting the banburying raw rubber into an open mill again, rolling to form sheet raw rubber, and then putting the sheet raw rubber into a vulcanizing machine, heating to 145 ℃ and vulcanizing for 1.5 hours;
step S3: and (3) granulation: and cutting the vulcanized rubber into dumbbell-shaped flaky vulcanized rubber, and granulating to obtain the EPDM rubber particles.
The dumbbell-shaped sheet-like vulcanized rubbers prepared in examples 1 to 7 were subjected to tests for tensile strength, breaking strength, toughness and elasticity, among which matteThe bell-shaped flaky cooked rubber is prepared by cutting flaky raw rubber into 1-shaped dumbbell-shaped sample strips by using an air-driven punching machine and a cutter, testing the dumbbell-shaped sample strips at normal temperature according to the national standard (GB/T528-2009), testing the tensile strength and the breaking tensile rate of the composite material dumbbell-shaped sample strips by using an electronic universal testing machine, wherein the rising rate of a clamp is 200mm min-1(ii) a Impact test Using a CEAST pendulum impactor, a Z20d energy knife was first used to cut A-shaped notches in a dumbbell-shaped sheet-like rubber according to GB/T1843-1996, and an impact test was carried out using a 2J cantilever beam at an impact velocity of 3.46m/s, and the test results are shown in Table 1 below:
TABLE 1 Performance testing of the examples
| DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION | Tensile strength (Mpa) | Elongation at Break (%) | Modulus of elasticity (Mpa) | Impact Strength (kJ/m)2) |
| Example 1 | 9.2 | 735 | 16.7 | 134 |
| Example 2 | 12.7 | 797 | 19.4 | 146 |
| Example 3 | 11.4 | 776 | 18.4 | 142 |
| Example 4 | 8.4 | 617 | 14.2 | 104 |
| Example 5 | 8.9 | 639 | 13.7 | 93 |
| Example 6 | 8.6 | 621 | 13.6 | 91 |
| Example 7 | 6.7 | 489 | 10.6 | 76 |
The testing method of thermal oxidation aging comprises the following steps: selecting 1-type dumbbell-shaped sample strips used in mechanical property test, putting the sample strips into a thermo-oxidative aging oven for thermo-oxidative aging test, wherein the test time is 72 hours, the temperature of the thermo-oxidative aging oven is set to be 100 ℃, and the tensile strength of the sample strips is tested,
The elongation at break, elastic modulus and impact strength results are given in table 2 below:
TABLE 2100 ℃ Performance testing of the examples after 72h thermo-oxidative aging
| DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION | Tensile strength (Mpa) | Elongation at Break (%) | Modulus of elasticity (Mpa) | Impact Strength (kJ/m)2) |
| Example 1 | 8.9 | 721 | 15.9 | 121 |
| Example 2 | 12.3 | 773 | 18.7 | 141 |
| Example 3 | 11.2 | 764 | 17.8 | 136 |
| Example 4 | 7.9 | 592 | 12.8 | 96 |
| Example 5 | 8.3 | 617 | 11.1 | 89 |
| Example 6 | 7.2 | 554 | 10.8 | 80 |
| Example 7 | 5.1 | 410 | 8.4 | 69 |
The principles and embodiments of the present invention are explained herein using specific examples, which are set forth only to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (8)
1. The EPDM rubber particle is characterized by being prepared from the following raw materials in parts by weight: 100 parts of ethylene propylene diene monomer, 10-20 parts of polypropylene, 5-15 parts of toughening agent, 40-60 parts of filler, 1-5 parts of vulcanizing agent and 5-10 parts of reinforcing agent, wherein the toughening agent comprises the following components in parts by weight: 1-5 parts of mercaptoacetic acid monoethanolamine and 2-5 parts of polybutylene terephthalate.
2. The EPDM rubber particles of claim 1 wherein the toughening agent further includes 2-5 parts squalene.
3. The EPDM rubber particles of claim 1 wherein the filler is one or more of calcium carbonate, white carbon black, and zinc oxide.
4. The EPDM rubber particles of claim 1 wherein the vulcanizing agent is sulfur.
5. The EPDM rubber particles of claim 1 wherein the reinforcing agent is one or more of carbon black, graphene and silica.
6. The EPDM rubber particles of claim 1 further including 1-5 parts of a colorant that is one of rubberscarlet, permanent yellow, phthalocyanine green, and phthalocyanine blue.
7. A method of making EPDM rubber particles as in any of claims 1-6 comprising the steps of:
step S1: mixing materials: uniformly mixing 100 parts of ethylene propylene diene monomer, 10-20 parts of polypropylene, 1-5 parts of mercaptoacetic acid monoethanolamine serving as a toughening agent, 2-5 parts of polybutylene terephthalate, 40-60 parts of a filler, 1-5 parts of a vulcanizing agent, 5-10 parts of a reinforcing agent and 1-5 parts of a coloring agent, and putting into an internal mixer for internal mixing to obtain raw internal mixing rubber;
step S2: and (3) vulcanization crosslinking: putting the banburying raw rubber into an open mill again, rolling the banburying raw rubber into sheet raw rubber, and then placing the sheet raw rubber into a vulcanizing machine to be heated and vulcanized for 1-2 hours;
step S3: and (3) granulation: and cutting the vulcanized rubber into dumbbell-shaped flaky vulcanized rubber, and granulating to obtain the EPDM rubber particles.
8. The method of producing EPDM rubber particles as recited in claim 7, wherein the vulcanization temperature in the step S2 is 140 ℃ to 150 ℃.
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