CN1546561A - Halogen-free flame-retardant dynamic vulcanized ternary ethylene-propylene rubber/ polypropylene thermoplastic elastomer - Google Patents
Halogen-free flame-retardant dynamic vulcanized ternary ethylene-propylene rubber/ polypropylene thermoplastic elastomer Download PDFInfo
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Abstract
The invention relates to the process for preparing polyethylene/ethylene-propylene rubber/carbon black macromolecule conductive composite material by using polythene / binary ethylen-propylene rubber or polythene / EPT rubber as macromolecular base, and using polyurethane or epoxy resin surface modifier with reactive group to perform surface coating modification to the carbon black particles, and through melting processing method.
Description
Technical field
The present invention relates to a kind of thermoplastic elastic material, particularly a kind of halogen-free flameproof dynamic vulcanization EPT rubber/thermoplastic elastomer.
Background technology
The dynamic vulcanization thermoplastic ethylene-propylene rubber/polyolefine elastomer is in the seventies appearance in last century.Its notable feature be exactly ethylene-propylene rubber(EPR) in the screw mixes extrusion crosslinked and with tiny particles dispersed in polyolefine, the polyolefinic working method of this analog thermoplastic elastomer available heat plasticity is processed, and has the elasticity of rubber in very wide temperature range.Therefore, this material has extensive use in fields such as automobile, building, medicine equipment, cable, packing and household electrical appliance.
In the prior art, U.S. Mengshan all (Monsanto) company is the company that obtains dynamic vulcanization thermoplastic ethylene-propylene rubber/polyolefine elastomer patent the earliest, and its U.S. Pat 4130535 and US4311628 are that linking agent prepares thermoplastic elastomer with sulphur and resol respectively.Application number be the Chinese patent of 91109976.X to have proposed a kind of be linking agent with resol, oils, the mixture of phthalic ester and superoxide is a properties-correcting agent, prepares the method for thermoplastic ethylene-propylene rubber/polyolefine elastomer.Application number be 90109067.0 Chinese patent propose be a kind of be the method that linking agent prepares thermoplastic ethylene-propylene rubber/polyolefine elastomer with the superoxide.Although more than various thermoplastic elastomers form and technology is distinguished to some extent, performance has their own characteristics each, yet, all these thermoplastic elastomers all are non-flame retardant resistances, oxygen index is generally less than 18, and the goods flame retardant properties of producing thus is generally lower, and security is relatively poor.Therefore, when giving full play to traditional hot thermoplastic elastic characteristic, flame retardant properties how fundamentally to improve this material is technical issues that need to address.
Summary of the invention
The objective of the invention is to propose a kind of halogen-free flameproof dynamic vulcanization EPT rubber/thermoplastic elastomer, promptly in the preparation of the dynamic vulcanization thermoplastic ethylene-propylene rubber/polyolefine elastomer of routine, introduce halogen-free flame retardants, and introduce antioxygen or fire-retardant compound and prepare oxygen index as softening agent and can reach 30 halogen-free flame-retardant thermoplastic elastomer.
For achieving the above object, the technical solution used in the present invention is: a kind of halogen-free flameproof dynamic vulcanization EPT rubber/thermoplastic elastomer, and the component of described thermoplastic elastomer and the content of parts by weight are as follows:
20～80 parts of terpolymer EP rubbers;
80～20 parts of polypropylene;
0.1～10 part of linking agent;
40～150 parts of halogen-free flame-retardant systems;
0～150 part in softening agent;
1～10 part of auxiliary agent;
Wherein, above-mentioned halogen-free flame-retardant system is magnesium hydroxide/red phosphorus system, and component in this system and weight ratio are:
Magnesium hydroxide 100;
Red phosphorus 5～20.
Related content and change interpretation in the technique scheme are as follows:
1, in the such scheme, described " parts by weight " are meant that being 1 part with any weight represents." weight ratio " in the described halogen-free flame-retardant system only represented the part by weight relation between magnesium hydroxide and the red phosphorus.
2, in the such scheme, the rubber of employing is terpolymer EP rubber (EPDM).In the terpolymer EP rubber, the content of ethene is 55%～75% of weight, and the content of propylene is 25%～35% of weight, and diene ENB content (weight) is with 0%～10% for well, and its Mooney viscosity (ML1+4,125 ℃) is preferably between 40 to 100.
3, in the such scheme, the polypropylene of employing (PP) can be homopolymerization, also can be ethene and copolymerization of propylene, and melting index MI is 0.5 to 20.0.
4, in the such scheme, described linking agent is an organo-peroxide, and this organo-peroxide is selected from a kind of in the following compounds: dicumyl peroxide, two (tertiary butyl peroxidation sec.-propyl) benzene, peroxide tertiary butyl isopropyl benzene, 2, two (the tertiary butyl peroxidation)-2 of 5-, 5-dimethyl-3-hexin, 2, two (the tertiary butyl peroxidation)-2 of 5-, the 5-dimethylhexane, dibenzoyl peroxide, the special butyl ester of peroxidation phenylformic acid, di-tert-butyl peroxide.
5, in the such scheme, the halogen-free flame-retardant system that is adopted is magnesium hydroxide/red phosphorus system, and the median size of magnesium hydroxide is less than 10 microns, preferably less than 2 microns.
6, in the preparation of general thermoplastic elastomer, in order to prepare the softish elastomerics, must add softening agent and reduce hardness, these softening agent all are easy incendiary higher aromatics oil, naphthenic oil or whiterusss.When the preparation flame-retardant thermoplastic elastomer, obviously can not use the easy incendiary oil of this class as softening agent.The present invention adopts compound antioxygen or flame retardant resistance to prepare Halogen Free Flame Retardant EPDM/polypropylene thermoplastic elastomer as softening agent, and the hardness of prepared Halogen Free Flame Retardant EPDM/polypropylene thermoplastic elastomer can be hanged down and be reached 70A.Described antioxygen or fire-retardant compound are one or more mixing in the following compounds: triphenyl (TPP), three (tolyl) phosphoric acid ester (TCP), trioctylphosphine phosphoric acid ester (TOP), three-(nonyl phenyl) phosphorous acid ester (TNPP), the tolyl diphenyl phosphoester, di(2-ethylhexyl)phosphate phenyl 2-ethylhexyl, the different certain herbaceous plants with big flowers ester of di(2-ethylhexyl)phosphate phenyl, tributyl phosphate, tricresyl phosphate methyl ester and triguaiacyl phosphate etc.
7, also use some plastic workings auxiliary agent commonly used among the present invention, as oxidation inhibitor, lubricant.
8, the thermoplastic elastomer of the present invention's proposition can or prepare on parallel dual-screw extruding machine at reciprocating type single screw extrusion machine.
The main physical properties of the halogen-free flameproof dynamic vulcanization EPT rubber/thermoplastic elastomer that the present invention proposes is as follows:
Hardness (Shao Shi) is (ISO48): 70A～50D
Tensile strength (ISO37): 5.0～15.0Mpa
Elongation (ISO37): 100%～300%
Compression set, 70 ℃ of 22h
(ASTM?D395)：????????????25％～55％
Oxygen index (ASTM D2863-87): 23%～30%
Because the technique scheme utilization, the present invention compared with prior art has following characteristics:
1, when keeping thermoplastics processibility and caoutchouc elasticity, in the durometer level of Shao Shi 70A～50D, can prepare the bittern-free flame-proof material of the self-extinguishing type of different oxygen indexs as required to nonflammable.
2, (as the Chinese patent publication number is 1341669, " preparation of halogenless fire-retardant polyolefine granules material " with general halogen-free anti-flaming polypropylene material; The Chinese patent publication number is 1335334, " a kind of preparation method of fireproofing cable material without halide ") to compare, thermoplastic elastomer of the present invention has tangible advantage: excellent low-temperature performance still has the elasticity of rubber in the time of-55 ℃.And the quite embrittlement in the time of-20 ℃ of general polypropylene material, the mechanical property extreme difference.
Embodiment
Below by embodiment the present invention is further described:
Embodiment 1～6:
The preparation method: with polypropylene, terpolymer EP rubber, part halogen-free flame retardants and auxiliary agent mixed in kneading pot 5 minutes, and the main spout of this mixture from twin screw extruder added; Remaining halogen-free flame retardants and linking agent mixed in kneading pot the 3rd district from twin screw forces feeding after 5 minutes; The intermediate zone of softening agent from twin screw is metered into.The temperature controlling range of twin screw extruder and mouthful mould is 140 ℃～220 ℃, and screw speed is controlled at 200rpm～350rpm.
The prescription of each embodiment sees Table 1, and the product performance data that obtain see Table 2.
Table 1.
| The terpolymer EP rubber consumption | The magnesium hydroxide consumption | The red phosphorus consumption | Plasticizer consumption | |
| Embodiment 1 | ????70 | ????70 | ????7 | ????30 |
| Embodiment 2 | ????70 | ????70 | ????10 | ????30 |
| Embodiment 3 | ????70 | ????70 | ????12 | ????30 |
| Embodiment 4 | ????60 | ????100 | ????10 | ????10 |
| Embodiment 5 | ????60 | ????80 | ????8 | ????10 |
| Embodiment 6 | ????60 | ????50 | ????5 | ????10 |
Annotate: 1, in all prescriptions, the numeral parts by weight of content.
2, in all prescriptions, polypropylene (PP)+terpolymer EP rubber (EPDM)=100.
3, in all prescriptions, the consumption of linking agent and auxiliary agent is identical to be 5, and wherein linking agent is selected from a kind of in the following compounds: dicumyl peroxide, two (tertiary butyl peroxidation sec.-propyl) benzene, peroxide tertiary butyl isopropyl benzene, 2, two (the tertiary butyl peroxidation)-2 of 5-, 5-dimethyl-3-hexin, 2, two (the tertiary butyl peroxidation)-2 of 5-, the 5-dimethylhexane, dibenzoyl peroxide, the special butyl ester of peroxidation phenylformic acid, di-tert-butyl peroxide.
4, in above-mentioned each prescription, softening agent is selected one or more mixing in following antioxygen or the fire-retardant compound: triphenyl, three (tolyl) phosphoric acid ester, the trioctylphosphine phosphoric acid ester, three-(nonyl phenyl) phosphorous acid esters, tolyl diphenyl phosphoester, di(2-ethylhexyl)phosphate phenyl 2-ethylhexyl, the different certain herbaceous plants with big flowers ester of di(2-ethylhexyl)phosphate phenyl, tributyl phosphate, tricresyl phosphate methyl ester and triguaiacyl phosphate.
Table 2.
| Tensile strength MPa | Elongation % | Compression set, 70 ℃ of 22h, % | Oxygen index % | |
| Detection method | ????ISO37 | ????ISO37 | ??ASTM?D395A | ??ASTM?D2863-87 |
| Embodiment 1 | ????7.5 | ????210 | ????41 | ????26 |
| Embodiment 2 | ????8.0 | ????230 | ????43 | ????28 |
| Embodiment 3 | ????7.4 | ????230 | ????44 | ????29 |
| Embodiment 4 | ????9.0 | ????180 | ????47 | ????30 |
| Embodiment 5 | ????10.3 | ????200 | ????50 | ????27 |
| Embodiment 6 | ????12.8 | ????290 | ????48 | ????23 |
The foregoing description only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.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, a kind of halogen-free flameproof dynamic vulcanization EPT rubber/thermoplastic elastomer, it is characterized in that: the component of described thermoplastic elastomer and the content of parts by weight are as follows:
20～80 parts of terpolymer EP rubbers;
80～20 parts of polypropylene;
0.1～10 part of linking agent;
40～150 parts of halogen-free flame-retardant systems;
0～150 part in softening agent;
1～10 part of auxiliary agent;
Wherein, above-mentioned halogen-free flame-retardant system is magnesium hydroxide/red phosphorus system, and component in this system and weight ratio are:
Magnesium hydroxide 100;
Red phosphorus 5～20.
2, thermoplastic elastic according to claim 1, it is characterized in that: described once to mould agent be one or more mixing in following antioxygen or the fire-retardant compound: triphenyl, three (tolyl) phosphoric acid ester, the trioctylphosphine phosphoric acid ester, three-(nonyl phenyl) phosphorous acid esters, tolyl diphenyl phosphoester, di(2-ethylhexyl)phosphate phenyl 2-ethylhexyl, the different certain herbaceous plants with big flowers ester of di(2-ethylhexyl)phosphate phenyl, tributyl phosphate, tricresyl phosphate methyl ester and triguaiacyl phosphate.
3, thermoplastic elastic according to claim 1 is characterized in that: described linking agent is an organo-peroxide, and this organo-peroxide is selected from a kind of in the following compounds: dicumyl peroxide, two (tertiary butyl peroxidation sec.-propyl) benzene, peroxide tertiary butyl isopropyl benzene, 2, two (the tertiary butyl peroxidation)-2 of 5-, 5-dimethyl-3-hexin, 2, two (the tertiary butyl peroxidation)-2 of 5-, the 5-dimethylhexane, dibenzoyl peroxide, the special butyl ester of peroxidation phenylformic acid, di-tert-butyl peroxide.
4, thermoplastic elastic according to claim 1, it is characterized in that: in the described terpolymer EP rubber, the content of ethene is 55%～75% of weight, and the content of propylene is 25%～35% of weight, the content of diene ENB is 0%～10% of weight, and its Mooney viscosity is between 40 to 100.
5, thermoplastic elastic according to claim 1 is characterized in that: described polypropylene is homopolymerization, or ethene and copolymerization of propylene, melting index MI is 0.5 to 20.0.
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Address after: Golden Bridge Development Zone 215101 Jiangsu city of Suzhou province Wuzhong District Mudu Patentee after: China Guangdong delta group (Suzhou) TWEI Plastic Co Ltd Address before: Golden Bridge Development Zone 215101 Jiangsu city of Suzhou province Wuzhong District Mudu Patentee before: Total Polymer Vision (Suzhou) Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060215 Termination date: 20191217 |