CN102977472A - Antistatic thermoplastic elastomer and preparation method thereof - Google Patents
Antistatic thermoplastic elastomer and preparation method thereof Download PDFInfo
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- CN102977472A CN102977472A CN2012105540543A CN201210554054A CN102977472A CN 102977472 A CN102977472 A CN 102977472A CN 2012105540543 A CN2012105540543 A CN 2012105540543A CN 201210554054 A CN201210554054 A CN 201210554054A CN 102977472 A CN102977472 A CN 102977472A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/625—Screws characterised by the ratio of the threaded length of the screw to its outside diameter [L/D ratio]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
- B29C2948/9259—Angular velocity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92885—Screw or gear
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Abstract
The invention discloses an antistatic thermoplastic elastomer and a preparation method of the antistatic thermoplastic elastomer. The antistatic thermoplastic elastomer comprises the following main raw materials in parts by weight: 30-50 parts of ethylene propylene diene monomer, 10-30 parts of polypropylene, 1-5 parts of nano metal powder, 10-50 parts of rubber oil, 1.0-3.0 parts of a compatilizer and certain parts of an additive. The raw materials are prepared according to respective weight parts, and are sent to a double-screw extruder for processing, wherein the double-screw extruder has process parameters as follows: the screw length-diameter ratio is 38-58, the screw rotating speed is 200 turns/min-500 turns/min, and the screw temperature is 140-200 DEG C. The antistatic thermoplastic elastomer prepared by adopting the preparation method has excellent anti-static property and good mechanical property, can be recycled, is shallow in color, and easy to dye, and ensures that products such as industrial products needing antistatic property can be displayed in multiple colors.
Description
Technical field
The present invention relates to a kind of thermoplastic elastomer and preparation method thereof, particularly a kind of anti-static thermoplastic elastomerics and preparation method thereof.
Background technology
PP/EPDM(is Pp/epdm) research of thermoplastic elastomer starts from the seventies in last century, develop into and should say now it has been a kind of relatively ripe thermoplastic sulfurized rubber, it combines EPDM with the advantage of PP, has excellent weather resisteant, ozone resistance, UV resistant performance and good high-temperature behavior, electrical property, shock resistance etc.PP/EPDM need not sulfuration and gets final product machine-shaping in addition, can adopt the thermoplastics processing equipment of standard to process, have processing easy, can produce continuously, the advantage such as tooling cost is low, tailing is recyclable.Therefore PP/EPDM is owing to the competitive edge at aspects such as raw material, performance and product prices, and its development is very fast, is the most successful a kind of Thermoplastic Vulcanizate of present industrialization (abbreviation is referred to as TPV).
PP/EPDM TPV(is Pp/epdm type thermoplastic dynamic perduren) development course experienced 3 main phase: the one, simple and mechanical blend, be the earliest the end of the sixties U.S. Uniroyal company realize suitability for industrialized production.The simple and mechanical blending method of main employing, wherein rubber content can not surpass 50% respectively, and this method is difficult for making the thermoplastic elastomer (abbreviation is referred to as TPE) of soft.The 2nd, the dynamic part sulfuration, 1962, Gessler at first proposed the concept of dynamic vulcanization; American scientist Fischer in 1973 has applied for that partial dynamic vulcanization EPDM and PP blend prepare the patent of TPV, and patent content is that the polyolefine such as PP (10% ~ 90%) and partial cross-linked binary or terpolymer EP rubber (90% ~ 10%) pass through the blend of blend system.Because it is crosslinked on a small quantity that EPDM only produces in blend, thereby the EPDM rubber phase is external phase in this blend, the PP resin-phase is disperse phase.Embody the performance of more external phase EPDM in the over-all properties of blend, and performance is relatively poor aspect processing rheological property, the intensity of material, compression set, heat-resisting, solvent resistance increase, shortcoming is that material hardness is higher, mobile on the low side, injecting products produces obvious current mark easily.The 3rd, dynamic complete cure, between 1975--1985, the people such as Coran have carried out going deep into systematic research to PP/EPDM TPV, made first preferably PP/EPDM TPV of over-all properties, rubber phase EPDM wherein is fully crosslinked and form particle diameter at the EPDM of 1 ~ 2 mu m range particle under violent shearing action.The EPDM transition is disperse phase, and PP changes external phase into, and the over-all properties of blend shows the strength of materials, elasticity, thermotolerance, incompressible tension set and improves a lot, and antifatigue, chemicals-resistant and processing stability have clear improvement.And EPDM and PP blending ratio can be regulated in a big way, make the PP/EPDM performance that larger adjusting leeway be arranged, processing rheological property also is further improved, the suitable various processing molding methods that adopt thermoplastics as inject, extrude, the technique such as blowing processes.U.S. Monsanto company realized suitability for industrialized production PP/EPDM TPV in 1981, commodity are called santoprene.The oil-filled EPDM of SUMITOMO CHEMICAL chemical company mixes with MODIFIED PP, crystallization PP respectively, or directly make master batch with PP kneading granulation, carry out Dynamic heat-treatment with superoxide again, it is good to make respectively low, the injection-molded property of hardness and extrude moulding property, the TPV material that physical strength is high.
Domestic research to PP/EPDM is started late.China carries out the research of dynamic vulcanization PP/EPDM TPV in early eighties, and has obtained larger progress.The Yin Jing of Changchun applied chemistry study institute China waits and has at first delivered at home PP/EPDM TPV patent in 1985.This patent has solved that free sulphur produces corrosion to copper conductor and the problem that can not be used for cable industry, and Application Areas is widened thus.The people such as the Zhu Yujun of Beijing University of Chemical Technology have delivered the PP/EPDM patent in 1992.PP/EPDM TPV is obtaining a wide range of applications aspect automobile, cable, industry and the articles for daily use.
At present, few about the report of Anti-static PP/EPDM TPV on the document, Chinese patent CN101440185A relates to a kind of antistatic dynamic vulcanization thermoplastic elastomer material, it is characterized in that, made by the raw material of following weight percent: polypropylene 15-30%, lubricant 0.1-0.5%, polypropylene 15-30%, terpolymer EP rubber 20-50%, softening agent 20-40%, POE 5-10%, compatilizer 3-10%, static inhibitor 2-8%, polyethylene wax 1-5%, vulcanizing agent 0.5-2%, promotor 0.5-2%, oxidation inhibitor 0.1-0.5%, lubricant 0.1-0.5%.Its preparation method is: weigh by weight percentage raw material; All raw materials were put into high-speed mixer and mixing 2-5 minute; Discharging; The raw material that mixes is put into the screw machine extruding pelletization, and the rotating speed of screw machine is 180-600 rev/min, and temperature is 160-200 ℃.Advantage of the present invention is to have excellent mechanical property, and antistatic property is superior, and its surface resistivity can reach 1011-1012 Ω.But this patent adopts be graphitized carbon black as static inhibitor, the antistatic material that makes can only be black.
Chinese patent CN101205337A discloses a kind of conductive dynamically vulcanized thermoplastic elastomer material, adopts high structural conductive carbon black as static inhibitor, and its surface resistivity can reach 200-800 Ω.The tensile strength of three samples, elongation at break, surface resistivity are respectively 6.1Mpa, 412%, 300 Ω; 8.5Mpa, 387%, 250 Ω and 11.2Mpa, 311%, 210 Ω.
One of main Application Areas of antistatic elastomerics is the handle of various power tools, and the button of electric equipment products, the parts such as handle, antistatic elastomerics are in the market all produced with graphitized carbon black, and color can only be black, has limited its application.Therefore, come the needs of satisfying the market in the urgent need to developing the various antistatic elastomer material of a kind of color.
Summary of the invention
The invention provides a kind of anti-static thermoplastic elastomerics and preparation method thereof, purpose is to solve existing antistatic or conductive elastomer color Single-issue.
For achieving the above object, the technical scheme that a kind of anti-static thermoplastic elastomerics of the present invention adopts is: composition of raw materials mainly is comprised of the material of following weight part:
Terpolymer EP rubber 30 ~ 50 weight parts;
Polypropylene 10 ~ 30 weight parts;
Nano metal powder 1 ~ 5 weight part;
Rubber oil 10 ~ 50 weight parts;
Compatilizer 1.0 ~ 3.0 weight parts;
Linking agent 0.2 ~ 2.0 weight part;
Crosslinking coagent 0.2 ~ 2.0 weight part;
Wherein:
(1) in the described terpolymer EP rubber, the content of ethene is 50% ~ 75% of terpolymer EP rubber gross weight, the content of propylene is 20% ~ 35% of terpolymer EP rubber gross weight, ethylidene norbornene (abbreviation is referred to as ENB) or vinyl norbornene (abbreviation is referred to as VNB) content are 2% ~ 10% of terpolymer EP rubber gross weight, the mooney viscosity of described terpolymer EP rubber is 20 ~ 100(ML 1+4,125 ℃) Mooney point;
(2) described polypropylene is the homopolymer of propylene, or is the multipolymer of ethene and propylene, and melting index is 0.2 to 30.0 gram/10 minutes;
(3) average particle size of described Nano metal powder is between 30 ~ 100 nanometers, and described metal powder is selected a kind of in aluminium, copper, the silver;
(4) described rubber oil is white oil, paraffin oil or naphthenic oil, under its 40 ℃ of conditions in kinematic viscosity between 40 square millimeters/second～200 square millimeters/second;
(5) described compatilizer is maleic anhydride inoculated polypropylene, and the percentage of grafting of maleic anhydride is about 1%;
(6) described linking agent is organo-peroxide, and this organo-peroxide is selected from a kind of in the following compounds:
Two (the tertiary butyl peroxidation)-2 of 2,5-, 5-dimethyl-3-hexin;
Two (the tertiary butyl peroxidation)-2 of 2,5-, the 5-dimethylhexane;
Dicumyl peroxide;
Tert-butyl hydroperoxide sec.-propyl carbonic ether;
The tert-butyl peroxide isopropyl benzene;
(7) described crosslinking coagent is selected from a kind of in the following compounds:
Diphenyl methane dimaleimide;
1,6-hexylene glycol double methacrylate;
N, N
,-penylene bismaleimides;
The trimethoxy propane trimethyl acrylic ester.
For achieving the above object, the technical scheme that a kind of anti-static thermoplastic method for producing elastomers of the present invention adopts is: after the material in the described composition of raw materials is prepared according to separately parts by weight, send in the twin screw extruder and process; Wherein, the processing parameter of described twin screw extruder is: screw slenderness ratio is 38～58, and screw speed is 200 rev/mins～500 rev/mins, and extruder temperature is 140 ℃～200 ℃.
Related content in the technique scheme is explained as follows:
1, in the such scheme, the elastomeric shore hardness of described anti-static thermoplastic is 30A～50D.Hardness is a kind of physics metric form of material compressive deformation degree or anti-puncture ability.Hardness is commonly used Shao Shi (also being Shore, Shao Er, English SHORE), Rockwell and three kinds of marker methods of Bu Shi.Shore hardness generally is used for rubber type of material.The testing method of shore hardness: insert measured material with Shore durometer, the pointer on the dial plate links to each other with a pricker by spring, and with being needled into the analyte surface, numerical value shown on the dial plate is hardness value.The described method of shore hardness divides two kinds of A, D, represents respectively different durometer levels, 90 degree following with the examination of Shore A hardness instrumentation, and draw data, 90 degree and abovely test and draw data with Shao Shi D sclerometer.
2, in the such scheme, also comprise the oxidation inhibitor of 0.1～1.5 weight part in the described composition of raw materials, described oxidation inhibitor is selected a kind of in the following material, perhaps at least two kinds of combinations in any proportion:
Four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester (trade(brand)name: antioxidant 1010);
3,3 '-propane thioic acid laurate (production firm: Double Bond Chemical(DBC)Ind. Co., Ltd., address: No. 99 new peaces of river for transporting grain to the capital informer times river rising in Ningxia and flowing into central Shaanxi, Shanghai City development area Tian Zhoulu building);
Tricresyl phosphite (2,4-di-tert-butyl-phenyl) ester (trade(brand)name: irgasfos 168);
β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid stearyl alcohol ester (trade(brand)name: antioxidant 1076);
2,6 ditertiary butyl p cresol (trade(brand)name: antioxidant 264);
1,1,3-three (2-methyl-4-hydroxyl-5-tert-butyl-phenyl) butane (trade(brand)name: antioxidant CA);
2,2-methylene-bis (4-methyl-6-tert-butylphenol) (trade(brand)name: antioxidant 2246).
3, in the such scheme, also comprise the anti UV agent of 0.1～1.5 weight part in the described composition of raw materials, described anti UV agent is selected a kind of in the following material, perhaps at least two kinds of combinations in any proportion:
2-(2 '-hydroxyl-3 ' 5 '-di-tert-butyl-phenyl)-5-chlorinated benzotriazole (trade(brand)name: UV light absorber UV-327);
2-(2 '-hydroxyl-the 3 '-tertiary butyl-5 '-aminomethyl phenyl)-5-chlorinated benzotriazole (trade(brand)name: ultraviolet absorbent uv-326);
Octabenzone (trade(brand)name: ultraviolet absorbent UV-531);
ESCALOL 567 (trade(brand)name: UV light absorber UV-9).
4, in the such scheme, also comprise the lubricant of 0.1～1.5 weight part in the described composition of raw materials, described lubricant is selected from a kind of in paraffin, stearic acid, Zinic stearas and the calcium stearate, perhaps at least two kinds of combinations in any proportion.
5, in the such scheme, mooney viscosity is to weigh rubber molecular-weight average and a plastic index, and mooney viscosity is measured with mooney's viscosimeter.Mooney's viscosimeter is the rotor of a standard, with constant rotating speed (general 2 rev/mins), rotates in sample.It is relevant with the viscosity variation of sample in sulfidation that rotor rotates suffered shearing resistance size, can be presented on the scale card take Mooney as unit by device for measuring force, and reading numerical values can be made the Mooney vulcanization curve in the same time interval.The unit of mooney viscosity is (Z 1+4,125 ℃), and according to GB 1232 standard codes, Mooney (rotation) viscosity represents with 125 ℃ of 1+4 of symbols Z.Wherein Z represents to rotate viscosity number; 1 represents that be 1min warm up time; 4 expression rotation times are 4min; 125 ℃ of expression test temperatures are 125 ℃, often represent mooney viscosity (GB/T 1233-2008 " mensuration of unvulcanized rubber incipient cure characteristic is sheared viscosmeter with disk and measured ") with ML125 ℃ of 1+4 traditionally.
6, in the such scheme, melting index (Melting Index, MI): thermoplastics is under certain temperature and pressure, and melt by the gravimetric value of standard capillary, represented with (g/10min) in ten minutes.
7, in the such scheme, in International System of Units, kinematic viscosity unit is this, i.e. per second square metre (m
2/ S), and centistoke (cst) commonly used in the practical measurement, the unit of expression centistoke is that the per second square millimeter (is 1cst=1mm
2/ S).Lubricating oil after kinematic viscosity is widely used in and measures jet fuel, diesel oil, lubricated wet goods liquid petroleum product deep color petroleum product, uses, the viscosity of former wet goods, the mensuration of kinematic viscosity adopts counter-current.
8, in the such scheme, the anti-static thermoplastic elastomerics that makes is albescent, adds colour batch in the material of gained in the past, thereby obtains the various antistatic elastomerics of color.Wherein, colour batch refers to the mixture of the high density color that is mixed with by resin and a large amount of pigment or the materials such as dyestuff, dispersion agent.
The elastomeric main physical properties of anti-static thermoplastic proposed by the invention is as follows after tested:
Hardness (Shao Shi) (ASTM D2240): 30A ~ 50D
Tensile strength (ASTM D412):＞=3.0MPa
Elongation (ASTM D412):＞=300%
Surface resistivity (ASTM D264):＜=10
10Ω
Because technique scheme is used, the present invention compared with prior art has following advantages and effect: the present invention adopts Nano metal powder as electro-conductive material, the antistatic property of the existing excellence of antistatic dynamic vulcanization thermoplastic elastomer material of preparation, sheet resistance Shuai＜=10
10Ω; There is again good mechanical property (elasticity, tensile property) La to stretch Qiang Du＞=3.0Mpa, Duan and splits the Chang Shuai of Shen＞=300%; Be convenient to recycling, color is superficial, is easy to dyeing so that household electrical appliance, Industrial products etc. need anlistatig product colourful color to occur.
Embodiment
The invention will be further described below in conjunction with embodiment:
Embodiment one～embodiment six: a kind of anti-static thermoplastic elastomerics and preparation method thereof
The preparation method: according to the composition of raw materials of table 1 with terpolymer EP rubber, polypropylene, Nano metal powder, maleic anhydride inoculated polypropylene compatilizers etc. mix 5 minutes in the plastics mixing kettle, the main spout of this miscellany from twin screw extruder added, rubber oil is distinguished to add from screw rod and is regulated product hardness, obtains the anti-static thermoplastic elastomerics through extruding pelletization.The diameter of twin screw extruder is 65 millimeters, and length-to-diameter ratio is 48, and temperature controlling range is 140 ℃ ~ 200 ℃, and screw speed is controlled at 290 rev/mins.The anti-static thermoplastic elastomerics that obtains is injection molded into print under 160 ℃ ~ 200 ℃ condition, then the performance of test material the results are shown in Table 2.
Composition of raw materials is comprised of the material of following weight part
Table 1: the composition of raw materials of embodiment one～embodiment six (unit: parts by weight)
| Project | Implement one | Implement two | Implement three | Implement four | Implement five | Implement six |
| Terpolymer EP rubber | 50 | 30 | 45 | 45 | 50 | 50 |
| Polypropylene | 25 | 25 | 30 | 30 | 25 | 20 |
| Nano metal powder | 1(silver) | 2(silver) | 3(silver) | 5(aluminium) | 4(aluminium) | 3(copper) |
| Rubber oil | 15 | 50 | 20 | 26 | 34 | 40 |
| Compatilizer | 1 | 1.5 | 2 | 3 | 2 | 2.5 |
| Linking agent | 0.8 | 0.5 | 1.8 | 1.3 | 2.0 | 1.0 |
| Crosslinking coagent | 1.0 | 0.5 | 1.6 | 2.0 | 1.0 | 1.2 |
| Antioxidant 1010 | 0.1 | 0.5 | 1.2 | 0.9 | 0.2 | 1.5 |
| Calcium stearate | 0.15 | 0.9 | 0.55 | 1.5 | 1.15 | 1.0 |
| Anti UV agent | 0.10 | 1.5 | 0.8 | 1.15 | 0.5 | 0.3 |
The description of contents of table 1 is as follows:
1, at the terpolymer EP rubber of above embodiment, adopt the EPT 3092PM of Mitsui company, the content of ethene is 50% ~ 75% of terpolymer EP rubber gross weight, the content of propylene is 20% ~ 35% of terpolymer EP rubber gross weight, ethylidene norbornene or vinyl norbornene content are 2% ~ 10% of terpolymer EP rubber gross weight, the mooney viscosity of described terpolymer EP rubber is 20 ~ 100(ML 1+4,125 ℃) Mooney point.
2, polyacrylic melting index is 0.2 to 30.0 gram/10 minutes.
3, rubber oil is selected white oil, paraffin oil or naphthenic oil, under its 40 ℃ of conditions in kinematic viscosity between 40 square millimeters/second～200 square millimeters/second.
4, compatilizer is maleic anhydride inoculated polypropylene, and the percentage of grafting of maleic anhydride is 1%.
5, linking agent adopts two (the tertiary butyl peroxidation)-2 of 2,5-, 5-dimethylhexane
6, crosslinking coagent adopts the trimethoxy propane trimethyl acrylic ester
7, anti UV agent adopts 2-(2 '-hydroxyl-3 ' 5 '-di-tert-butyl-phenyl)-5-chlorinated benzotriazole (trade(brand)name: UV light absorber UV-327)
Table 2: the performance index of embodiment one～embodiment six
| Performance | Implement one | Implement two | Implement three | Implement four | Implement five | Implement six |
| Hardness, Shao A | 65 | 67 | 85 | 83 | 65 | 58 |
| Tear strength, MPa | 4.4 | 4.5 | 7.4 | 7.0 | 4.0 | 3.6 |
| Tensile strength, % | 500 | 490 | 530 | 510 | 560 | 500 |
| Surface resistivity, Ω | 1.2×10 9 | 1.9×10 7 | 5.3×10 6 | 1.9×10 7 | 9.3×10 7 | 8.1×10 7 |
The elastomeric quality of the prepared a kind of anti-static thermoplastic of the present invention is weighed by surface measurements resistance, and a kind of surface resistivity of material is less than 10
10Have certain antistatic property during Ω, the less static resistance of numerical value is better.As can be seen from Table 1, because anti-static thermoplastic elastomer material of the present invention does not add the graphitized carbon black of black, so the material that makes is albescent, added colour batch in the material of gained in the past, thereby obtained the various antistatic elastomerics of color.As can be seen from Table 2, the elastomeric surface resistivity of anti-static thermoplastic can reach 10
6About Ω, antistatic property is good.
Above-described embodiment only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow the personage who is familiar with technique can understand content of the present invention and according to this enforcement.Those skilled in the art need only under the inspiration of above-described embodiment composition of raw materials is made to change the effect that can obtain to be equal to too in the framework of the present definition.Such as rubber oil being changed into white oil or paraffin oil; Change linking agent into two (the tertiary butyl peroxidation)-2 of 2,5-, 5-dimethyl-3-hexin; Dicumyl peroxide; Dicumyl peroxide; Tert-butyl hydroperoxide sec.-propyl carbonic ether; The tert-butyl peroxide isopropyl benzene; Change crosslinking coagent into diphenyl methane dimaleimide; 1,6-hexylene glycol double methacrylate; N, N
,-penylene bismaleimides; Change oxidation inhibitor into 3,3 '-propane thioic acid laurate; Tricresyl phosphite (2,4-di-tert-butyl-phenyl) ester (trade(brand)name: irgasfos 168); β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid stearyl alcohol ester; Change anti UV agent into 2-(2 '-hydroxyl-3 '-tertiary butyl-5 '-aminomethyl phenyl)-5-chlorinated benzotriazole (trade(brand)name: ultraviolet absorbent uv-326); Octabenzone (trade(brand)name: ultraviolet absorbent UV-531); ESCALOL 567 (trade(brand)name: UV light absorber UV-9); Change lubricant into paraffin, stearic acid or Zinic stearas.All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (5)
1. anti-static thermoplastic elastomerics, it is characterized in that: composition of raw materials mainly is comprised of the material of following weight part:
Terpolymer EP rubber 30 ~ 50 weight parts;
Polypropylene 10 ~ 30 weight parts;
Nano metal powder 1 ~ 5 weight part;
Rubber oil 10 ~ 50 weight parts;
Compatilizer 1.0 ~ 3.0 weight parts;
Linking agent 0.2 ~ 2.0 weight part;
Crosslinking coagent 0.2 ~ 2.0 weight part;
Wherein:
(1) in the described terpolymer EP rubber, the content of ethene is 50% ~ 75% of terpolymer EP rubber gross weight, the content of propylene is 20% ~ 35% of terpolymer EP rubber gross weight, and ethylidene norbornene or vinyl norbornene content are 2% ~ 10% of terpolymer EP rubber gross weight;
(2) described polypropylene is the homopolymer of propylene, or is the multipolymer of ethene and propylene, and melting index is 0.2 to 30.0 gram/10 minutes;
(3) average particle size of described Nano metal powder is between 30 ~ 100 nanometers, and described metal powder is selected a kind of in aluminium, copper, the silver;
(4) described rubber oil is white oil, paraffin oil or naphthenic oil, under its 40 ℃ of conditions in kinematic viscosity between 40 square millimeters/second～200 square millimeters/second;
(5) described compatilizer is maleic anhydride inoculated polypropylene;
(6) described linking agent is organo-peroxide, and this organo-peroxide is selected from a kind of in the following compounds:
Two (the tertiary butyl peroxidation)-2 of 2,5-, 5-dimethyl-3-hexin;
Two (the tertiary butyl peroxidation)-2 of 2,5-, the 5-dimethylhexane;
Dicumyl peroxide;
Tert-butyl hydroperoxide sec.-propyl carbonic ether;
The tert-butyl peroxide isopropyl benzene;
(7) described crosslinking coagent is selected from a kind of in the following compounds:
Diphenyl methane dimaleimide;
1,6-hexylene glycol double methacrylate;
N, N
,-penylene bismaleimides;
The trimethoxy propane trimethyl acrylic ester.
2. anti-static thermoplastic elastomerics according to claim 1 is characterized in that: also comprise the oxidation inhibitor of 0.1～1.5 weight part in the described composition of raw materials, described oxidation inhibitor is selected a kind of in the following material, perhaps at least two kinds of combinations in any proportion:
Four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester;
3,3 '-propane thioic acid laurate;
Tricresyl phosphite (2,4-di-tert-butyl-phenyl) ester;
β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid stearyl alcohol ester;
2,6 ditertiary butyl p cresol;
1,1,3-three (2-methyl-4-hydroxyl-5-tert-butyl-phenyl) butane;
2,2-methylene-bis (4-methyl-6-tert-butylphenol).
3. anti-static thermoplastic elastomerics according to claim 1, it is characterized in that: the anti UV agent that also comprises 0.1～1.5 weight part in the described composition of raw materials, described anti UV agent is selected a kind of in the following material, perhaps at least two kinds of combinations in any proportion:
2-(2 '-hydroxyl-3 ' 5 '-di-tert-butyl-phenyl)-the 5-chlorinated benzotriazole;
2-(2 '-hydroxyl-the 3 '-tertiary butyl-5 '-aminomethyl phenyl)-the 5-chlorinated benzotriazole;
Octabenzone;
ESCALOL 567.
4. anti-static thermoplastic elastomerics according to claim 1, it is characterized in that: the lubricant that also comprises 0.1～1.5 weight part in the described composition of raw materials, described lubricant is selected from a kind of in paraffin, stearic acid, Zinic stearas and the calcium stearate, perhaps at least two kinds of combinations in any proportion.
5. anti-static thermoplastic method for producing elastomers, it is characterized in that: described anti-static thermoplastic elastomerics one of according to claim 1～4, after material in the described composition of raw materials prepared according to separately parts by weight, send in the twin screw extruder and process; Wherein, the processing parameter of described twin screw extruder is: screw slenderness ratio is 38～58, and screw speed is 200 rev/mins～500 rev/mins, and extruder temperature is 140 ℃～200 ℃.
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