CN106589618A - Halogen-free flame retardant dynamically vulcanized EPDM/PP thermoplastic elastomer and preparation method thereof - Google Patents
Halogen-free flame retardant dynamically vulcanized EPDM/PP thermoplastic elastomer and preparation method thereof Download PDFInfo
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- 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
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Abstract
The invention discloses a halogen-free flame retardant dynamically vulcanized EPDM/PP thermoplastic elastomer and a preparation method thereof. The EPDM/PP thermoplastic elastomer is prepared from, by mass, 100 parts of EPDM, 40-80 parts of polypropylene, 1-3 parts of crosslinking agent, 1-3 parts of auxiliary crosslinking agent, 44-78 parts of composite halogen-free flame retardant agent, 0.5-1 part of silane coupling agent, 1-2 parts of lubricant, and 1-2 parts of anti-oxidant. The preparation method comprises the steps of firstly mixing uniformly the composite halogen-free flame retardant agent and the silane coupling agent, adding EPDM, PP and lubricant, alloying, plasticizing the mixture, extruding, granulating, and finally adding the crosslinking agent, auxiliary crosslinking agent and the anti-oxidant, alloying, plasticizing, extruding the mixture and granulating. The EPDM/PP thermoplastic elastomer not only has a good flame retardant property which can attain the flame retardant level of UL94-V0, but also has an excellent mechanical property, anti-aging property and hydrolysis resistance. The halogen-free flame retardant dynamically vulcanized EPDM/PP thermoplastic elastomer has the advantages of being simple in preparation process, low in production cost, and easy for industrialized production.
Description
Technical field
The present invention relates to a kind of halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s and preparation method thereof, belong to multiple
Condensation material technical field.
Background technology
Dynamic vulcanization EPT rubber (EPDM/PP) thermoplastic elastomer (TPE) is a kind of elasticity for having EPDM concurrently
With the fluidity of molten of PP, and can reusable material.EPDM and PP can occur in melt blending it is in-situ cross-linked, while
Under the high speed shear stress of mixing machinery, the EPDM of crosslinking is cut into molecule (also referred to as microcell), in being dispersed in PP,
The rubber domain of this crosslinking mainly gives blending body elasticity, and PP then provides the thermoplastic flowing under melt temperature.Dynamic vulcanization
EPDM/PP thermoplastic elastomers have excellent physical and mechanical properties, electrical insulation properties and processing characteristics, are widely used in
The various fields such as automobile, electric, electric wire, machined medical, building packaging material.
However, because the fire resistance of dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s is poor, security performance is inadequate, very
Multi-field application is all restricted.People have begun to carry out the resistance of dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s very early
Combustion performance study, but not yet obtain preferable effect.The Chinese patent of Application No. 200310106228.0 discloses a kind of dynamic
State vulcanizes fire-retardant EPDM/PP elastomers, with the addition of brominated flame-retardant in the thermoplastic elastomer (TPE), although oxygen index (OI) is reached as high as
32, but it is unfriendly to environment, it is impossible to meet the requirement of RoHS and WEEK；The Chinese patent of Application No. 200310112701.6 is public
Opened a kind of halogen-free flameproof dynamic vulcanization EPDM/PP method for producing elastomers, the amount of flame-retardant agent for being adopted is big, it is hygroscopic and
Separate out, seriously reduce the mechanical property and ageing properties of material；The Chinese patent of Application No. 201110138957.9 is disclosed
A kind of nitrogen phosphorus system halogen-free flameproof dynamic vulcanization EPDM/PP method for producing elastomers, it is first that EPDM, PP, phenolic resin is multiple
Close vulcanizing agent, filling oil and kneaded into semi-finished product particle, being subsequently adding SEBS, nitrogen phosphorus fire retardant and auxiliary agent carries out mixing modeling
Change, the elastomer of preparation is undesirable because introducing SEBS, fire resistance and compression performance.
The content of the invention
The purpose of the present invention is for problems of the prior art, there is provided a kind of halogen-free flameproof dynamic vulcanization EPDM/
PP thermoplastic elastomer (TPE)s and preparation method thereof.
The technical solution used in the present invention is：
A kind of halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s, it is prepared from by the raw material of following mass parts：
Ethylene propylene diene rubber：100 parts；
Polypropylene：40～80 parts；
Crosslinking agent：1～3 part；
Assistant crosslinking agent：1～3 part；
Composite halogen-free fire retardant：44～78 parts；
Silane coupler：0.5～1 part；
Lubricant：1～2 part；
Antioxidant：1～2 part.
In described ethylene propylene diene rubber ethylene contents be 55wt%～75wt%, propylene content be 25wt%～
35wt%, ENB content is 0～10wt%.
Described polypropylene be block copolymerization polypropylene, HOPP at least one, melt flow rate (MFR) be 1～
20g/min, test condition is 230 DEG C/2.16kg.
Described crosslinking agent be cumyl peroxide, dual-tert-butyl peroxy isopropyl base benzene, 2,5- dimethyl -2,5- bis-
At least one in (tert-butyl hydroperoxide) hexane.
Described assistant crosslinking agent be N, a N '-penylene BMI, Triallyl isocyanurate, trihydroxy methyl third
At least one in alkane triacrylate.
Described composite halogen-free fire retardant by APP, poly- triazine and organic nano silica in mass ratio (20～
60)：(10～30)：(1～5) constitute.
The crystal II-type ammonium polyphosphate that described APP is more than 1000 for the degree of polymerization of epoxy resin modification.
The structural formula of described poly- triazine is：Wherein 10≤n≤12.
Described silane coupler is gamma-aminopropyl-triethoxy-silane, VTES, octyl group trimethoxy
At least one in base silane.
Described lubricant be Tissuemat E, silicone, ethylenebis fatty acid amide, stearic acid pentaerythritol ester in extremely
Few one kind.
Described antioxidant is Hinered phenols antioxidant, thio-2 acid dibasic acid esters kind antioxidant, phosphite ester kind antioxidant
In at least one.
Above-mentioned halogen-free flameproof dynamic vulcanization EPDM/PP process for preparation of thermoplastic elastomer is comprised the following steps：
1) composite halogen-free fire retardant is added into high mixer, is well mixed, add silane coupler, be well mixed, obtained
Premix compound I；
2) ethylene propylene diene rubber, polypropylene, premix compound I and lubricant are added into high mixer, is well mixed, then by material
Corotating twin-screw machine is proceeded to, plasticizing, extruding pelletization obtain premix compound II；
3) premix compound II, crosslinking agent, assistant crosslinking agent and antioxidant are added into high mixer, is well mixed, then turn material
Enter corotating twin-screw machine, plasticizing, extruding pelletization obtain halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s.
The invention has the beneficial effects as follows：The halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s of the present invention not only hinder
Combustion performance is good, reaches UL94-V0 fire-retardant ranks, and its mechanical property, ageing-resistant performance and hydrolytic Resistance are good, preparation technology letter
It is single, low production cost, it is easy to accomplish industrialized production.
1) present invention is with poly- triazine, APP and organic nano silica as composite flame-retardant agent, not only flame retarding efficiency
It is high, it is only necessary to which that relatively low addition can just reach UL94-V0 fire-retardant ranks, and disperse compatibility good in matrix resin；
2) present invention is with peroxide as vulcanizing system, and the combination property after crosslinking is outstanding, it is not easy to which excessively crosslinking occurs
" burning " phenomenon；
3) present invention prepares halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomehcs using two step double-screw extruding pelletizing techniques
Gonosome, solve the elastomeric material melt existed after crosslinking causes fire retardant homodisperse cannot ask because viscosity is too big
Topic.
Specific embodiment
A kind of halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s, it is prepared from by the raw material of following mass parts：
Ethylene propylene diene rubber：100 parts；
Polypropylene：40～80 parts；
Crosslinking agent：1～3 part；
Assistant crosslinking agent：1～3 part；
Composite halogen-free fire retardant：44～78 parts；
Silane coupler：0.5～1 part；
Lubricant：1～2 part；
Antioxidant：1～2 part.
Preferably, ethylene contents are 55wt%～75wt% in described ethylene propylene diene rubber, and propylene content is 25wt%
～35wt%, ENB (ENB) content is 0～10wt%.
Preferably, described polypropylene is at least one in block copolymerization polypropylene, HOPP, and melt flows are fast
Rate is 1～20g/min, and test condition is 230 DEG C/2.16kg.
Preferably, described crosslinking agent is cumyl peroxide, dual-tert-butyl peroxy isopropyl base benzene (BIPB), 2,5- bis-
Methyl -2, at least one in 5- bis- (tert-butyl hydroperoxide) hexane (DHBP).
Preferably, described assistant crosslinking agent be N, a N '-penylene BMI, Triallyl isocyanurate, three
At least one in hydroxymethyl-propane triacrylate.
Preferably, described composite halogen-free fire retardant presses quality by APP, poly- triazine and organic nano silica
Than (20～60)：(10～30)：(1～5) constitute.
It is further preferred that described composite halogen-free fire retardant is by APP, poly- triazine and organic nano silica
In mass ratio (28～50)：(14～25)：(2～3) constitute.
Preferably, the crystallization II-type polyphosphoric acid that described APP is more than 1000 for the degree of polymerization of epoxy resin modification
Ammonium.
Preferably, the structural formula of described poly- triazine is：Wherein 10≤n≤
12。
Preferably, described organic nano silica is vapor phase method organic nano silica or precipitation method organic nano
Silica.
Preferably, described silane coupler is gamma-aminopropyl-triethoxy-silane, VTES, pungent
At least one in base trimethoxy silane.
Preferably, described lubricant is Tissuemat E, silicone, ethylenebis fatty acid amide (EBS), stearic acid season penta
At least one in four alcohol esters (PETS).
Preferably, described antioxidant is Hinered phenols antioxidant, thio-2 acid dibasic acid esters kind antioxidant, phosphorous acid esters
At least one in antioxidant.
It is further preferred that the antioxidant is in antioxidant 1010, antioxidant 1076, irgasfos 168, anti-oxidant DLTP
At least one.
Above-mentioned halogen-free flameproof dynamic vulcanization EPDM/PP process for preparation of thermoplastic elastomer is comprised the following steps：
1) composite halogen-free fire retardant is added into high mixer, is well mixed, add silane coupler, be well mixed, obtained
Premix compound I；
2) ethylene propylene diene rubber, polypropylene, premix compound I and lubricant are added into high mixer, is well mixed, then by material
Corotating twin-screw machine is proceeded to, plasticizing, extruding pelletization obtain premix compound II；
3) premix compound II, crosslinking agent, assistant crosslinking agent and antioxidant are added into high mixer, is well mixed, then turn material
Enter corotating twin-screw machine, plasticizing, extruding pelletization obtain halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s.
Preferably, step 2) described in extruding pelletization temperature be 170～200 DEG C.
Preferably, step 3) described in extruding pelletization temperature be 160～190 DEG C.
The present invention is made further explanation and description with reference to specific embodiment.
Embodiment 1：
A kind of halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s, its raw material composition is as shown in table 1：
A kind of raw material composition table of the halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s of table 1
| Raw material | Mass parts |
| Ethylene propylene diene rubber 2470P | 100 |
| Polypropylene 1100NK | 67 |
| Dual-tert-butyl peroxy isopropyl base benzene (BIBP) | 1 |
| Triallyl isocyanurate (TAIC) | 2 |
| Epoxy resin modification crystal II-type ammonium polyphosphate | 28 |
| Poly- triazine (HCFA) | 14 |
| Organic nano silica | 2 |
| VTES | 0.5 |
| Ethylenebis fatty acid amide (EBS) | 1 |
| Antioxidant 1076 | 1 |
Above-mentioned halogen-free flameproof dynamic vulcanization EPDM/PP process for preparation of thermoplastic elastomer is as follows：
1) epoxide modified APP, poly- triazine and organic nano silica are added into high mixer, is stirred 10 minutes, plus
Enter VTES, stir 10 minutes, obtain premix compound I；
2) ethylene propylene diene rubber 2470P, polypropylene 1100NK, premix compound I and ethylenebis fatty acid amide (EBS) are added
Enter high mixer, stir 10 minutes, then material is proceeded to into corotating twin-screw machine, plastify, 180～200 DEG C of extruding pelletizations are obtained
To premix compound II；
3) by premix compound II, dual-tert-butyl peroxy isopropyl base benzene (BIBP), Triallyl isocyanurate (TAIC) and anti-
Oxygen agent 1076 adds high mixer, stirs 5 minutes, then material is proceeded to into corotating twin-screw machine, plastifies, and 170～190 DEG C are squeezed
Go out granulation, obtain halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s.
Embodiment 2：
A kind of halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s, its raw material composition is as shown in table 2：
A kind of raw material composition table of the halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s of table 2
Above-mentioned halogen-free flameproof dynamic vulcanization EPDM/PP process for preparation of thermoplastic elastomer is as follows：
1) epoxide modified APP, poly- triazine and organic nano silica are added into high mixer, is stirred 15 minutes, plus
Enter VTES, stir 10 minutes, obtain premix compound I；
2) ethylene propylene diene rubber 2760P, polypropylene 1100NK, premix compound I and ethylenebis fatty acid amide (EBS) are added
Enter high mixer, stir 15 minutes, then material is proceeded to into corotating twin-screw machine, plastify, 180～200 DEG C of extruding pelletizations are obtained
To premix compound II；
3) by premix compound II, 2,5- dimethyl -2,5- double (tert-butyl peroxide) hexane, Triallyl isocyanurates
(TAIC) and antioxidant 1010 add high mixer, stir 10 minutes, then material is proceeded to into corotating twin-screw machine, plastify,
170～190 DEG C of extruding pelletizations, obtain halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s.
Embodiment 3：
A kind of halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s, its raw material composition is as shown in table 3：
A kind of raw material composition table of the halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s of table 3
Above-mentioned halogen-free flameproof dynamic vulcanization EPDM/PP process for preparation of thermoplastic elastomer is as follows：
1) epoxide modified APP, poly- triazine and organic nano silica are added into high mixer, is stirred 10 minutes, plus
Enter octyl group trimethoxy silane, stir 15 minutes, obtain premix compound I；
2) ethylene propylene diene rubber 2760P, polypropylene 5090T, premix compound I and stearic acid pentaerythritol ester (PETS) are added
High mixer, stirs 10 minutes, then material is proceeded to into corotating twin-screw machine, plastifies, and 170～190 DEG C of extruding pelletizations are obtained
Premix compound II；
3) by premix compound II, 2,5- dimethyl -2,5- double (tert-butyl peroxide) hexane, N, a N '-penylene span carrys out acyl
Imines (PDM) and antioxidant 1076 add high mixer, stir 10 minutes, then material are proceeded to into corotating twin-screw machine, mould
Change, 170～190 DEG C of extruding pelletizations obtain halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s.
Embodiment 4：
A kind of halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s, its raw material composition is as shown in table 4：
A kind of raw material composition table of the halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s of table 4
Above-mentioned halogen-free flameproof dynamic vulcanization EPDM/PP process for preparation of thermoplastic elastomer is as follows：
1) epoxide modified APP, poly- triazine and organic nano silica are added into high mixer, is stirred 20 minutes, plus
Enter VTES, stir 10 minutes, obtain premix compound I；
2) ethylene propylene diene rubber 2470P, polypropylene 5090T, premix compound I and silicone are added into high mixer, are stirred 10 minutes,
Then material is proceeded to into corotating twin-screw machine, is plastified, 180～200 DEG C of extruding pelletizations obtain premix compound II；
3) by premix compound II, dual-tert-butyl peroxy isopropyl base benzene (BIBP), trimethylolpropane trimethacrylate (TMPTA)
High mixer is added with antioxidant 1010, is stirred 10 minutes, then material is proceeded to into corotating twin-screw machine, plastified, 160～
180 DEG C of extruding pelletizations, obtain halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s.
Embodiment 5：
A kind of halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s, its raw material composition is as shown in table 5：
A kind of raw material composition table of the halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s of table 5
| Raw material | Mass parts |
| Ethylene propylene diene rubber 3090PM | 100 |
| Polypropylene 1100NK | 80 |
| Cumyl peroxide (DCP) | 3 |
| Trimethylolpropane trimethacrylate (TMPTA) | 2 |
| Epoxy resin modification crystal II-type ammonium polyphosphate | 44 |
| Poly- triazine (HCFA) | 22 |
| Organic nano silica | 3 |
| Gamma-aminopropyl-triethoxy-silane | 0.7 |
| Tissuemat E | 1 |
| Irgasfos 168 | 2 |
Above-mentioned halogen-free flameproof dynamic vulcanization EPDM/PP process for preparation of thermoplastic elastomer is as follows：
1) epoxide modified APP, poly- triazine and organic nano silica are added into high mixer, is stirred 15 minutes, plus
Enter gamma-aminopropyl-triethoxy-silane, stir 10 minutes, obtain premix compound I；
2) ethylene propylene diene rubber 3090PM, polypropylene 1100NK, premix compound I and Tissuemat E are added into high mixer, stirring
20 minutes, then material is proceeded to into corotating twin-screw machine, plastified, 170～190 DEG C of extruding pelletizations obtain premix compound II；
3) by premix compound II, cumyl peroxide (DCP), trimethylolpropane trimethacrylate (TMPTA) and antioxygen
Agent 168 adds high mixer, stirs 5 minutes, then material is proceeded to into corotating twin-screw machine, plastifies, 160～180 DEG C of extrusions
Granulation, obtains halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s.
Comparative example 1：
A kind of dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s, its raw material composition is as shown in table 6：
A kind of raw material composition table of the dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s of table 6
| Raw material | Mass parts |
| Ethylene propylene diene rubber 2470P | 100 |
| Polypropylene 1100NK | 67 |
| Dual-tert-butyl peroxy isopropyl base benzene (BIBP) | 1 |
| Triallyl isocyanurate (TAIC) | 2 |
| Epoxy resin modification crystal II-type ammonium polyphosphate | 28 |
| Pentaerythrite | 14 |
| Organic nano silica | 2 |
| VTES | 0.5 |
| Ethylenebis fatty acid amide (EBS) | 1 |
| Antioxidant 1076 | 1 |
Above-mentioned dynamic vulcanization EPDM/PP process for preparation of thermoplastic elastomer is as follows：
1) epoxide modified APP, pentaerythrite and organic nano silica are added into high mixer, are stirred 10 minutes,
VTES is added, is stirred 10 minutes, obtain premix compound I；
2) ethylene propylene diene rubber 2470P, polypropylene 1100NK, premix compound I and ethylenebis fatty acid amide (EBS) are added
Enter high mixer, stir 10 minutes, then material is proceeded to into corotating twin-screw machine, plastify, 180～200 DEG C of extruding pelletizations are obtained
To premix compound II；
3) by premix compound II, dual-tert-butyl peroxy isopropyl base benzene (BIBP), Triallyl isocyanurate (TAIC) and anti-
Oxygen agent 1076 adds high mixer, stirs 5 minutes, then material is proceeded to into corotating twin-screw machine, plastifies, and 170～190 DEG C are squeezed
Go out granulation, obtain dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s.
Comparative example 2：
A kind of dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s, its raw material composition is as shown in table 7：
A kind of raw material composition table of the dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s of table 7
Above-mentioned dynamic vulcanization EPDM/PP process for preparation of thermoplastic elastomer is as follows：
1) epoxide modified APP and poly- triazine are added into high mixer, is stirred 10 minutes, add octyl group trimethoxy silicon
Alkane, stirs 15 minutes, obtains premix compound I；
2) ethylene propylene diene rubber 2760P, polypropylene 5090T, premix compound I and stearic acid pentaerythritol ester (PETS) are added
High mixer, stirs 10 minutes, then material is proceeded to into corotating twin-screw machine, plastifies, and 170～190 DEG C of extruding pelletizations are obtained
Premix compound II；
3) by premix compound II, 2,5- dimethyl -2,5- double (tert-butyl peroxide) hexane, N, a N '-penylene span carrys out acyl
Imines (PDM) and antioxidant 1076 add high mixer, stir 10 minutes, then material are proceeded to into corotating twin-screw machine, mould
Change, 170～190 DEG C of extruding pelletizations obtain dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s.
Test case：
Performance survey is carried out to dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s prepared by embodiment 1～5 and comparative example 1～2
Examination, test result is as shown in table 8：
The performance test data of the dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s of the embodiment 1～5 of table 8 and comparative example 1～2
Testing standard and method：
Flame retardant rating：Tested by UL94 standards, batten thickness is 1.6mm；
Tensile strength and elongation at break：Tested by ASTM-D412 standards, rate of extension is 500mm/min；
Stretching strength retentivity (burn-in test)：By GB/T 3512-2014/ISO 188:2011 standards are tested, and are surveyed
Examination temperature T=125 DEG C, testing time t=72h；
Elongation at break conservation rate (burn-in test)：By GB/T 3512-2014/ISO 188:2011 standards are tested,
Test temperature T=125 DEG C, testing time t=72h；
Permanent compression set：By GB/T 7759.1-2015/ISO 815-1:2008 standards are tested, test temperature T
=23 DEG C, testing time t=48h；
Elongation at break conservation rate (water-resistance test)：Test bars are placed in 70 DEG C of distilled water, every 24h water is changed
Once, the testing time is 168h.
Comparative analysis：
1) from table 1, table 6 and table 8：The poly- triazine of fire retardant (HCFA) is with the addition of in embodiment 1, comparative example 1 with the addition of
Fire retardant pentaerythrite, the fire resistance of EPDM/PP thermoplastic elastomer (TPE)s prepared by embodiment 1 is bright for other conditions
It is aobvious to be better than comparative example 1, and tensile strength, elongation at break, stretching strength retentivity (aging) and elongation at break conservation rate are (anti-
Water) comparative example 1 is superior to, the organic macromolecule compound that poly- triazine is stable chemical nature is primarily due to, heat endurance is good,
Surface polarity is little, good with EPDM, PP compatibility, and poly- triazine is uniformly dispersed in matrix material, to the mechanical performance of material and
Processing characteristics affects little；
2) from table 3, table 7 and table 8：Organic nano silica is with the addition of in embodiment 3, is not added with comparative example 2
Organic nano silica, the fire resistance of EPDM/PP thermoplastic elastomer (TPE)s prepared by embodiment 3 will for other conditions
It is substantially better than comparative example 2, and tensile strength, elongation at break, stretching strength retentivity (aging), elongation at break conservation rate
(aging) and elongation at break conservation rate (water resistant) are superior to comparative example 2, are primarily due to organic nano silica and not only may be used
To improve fire resistance, and mechanical property can be improved.
Above-described embodiment is the present invention preferably embodiment, but embodiments of the present invention not by above-described embodiment
Limit, other any Spirit Essences without departing from the present invention and the change, modification, replacement made under principle, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (10)
1. a kind of halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s, it is characterised in that：Its by following mass parts raw material
It is prepared from：
Ethylene propylene diene rubber：100 parts；
Polypropylene：40～80 parts；
Crosslinking agent：1～3 part；
Assistant crosslinking agent：1～3 part；
Composite halogen-free fire retardant：44～78 parts；
Silane coupler：0.5～1 part；
Lubricant：1～2 part；
Antioxidant：1～2 part.
2. halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s according to claim 1, it is characterised in that：It is described
Ethylene propylene diene rubber in ethylene contents be 55wt%～75wt%, propylene content be 25wt%～35wt%, ethylidene norborneol
Alkene content is 0～10wt%.
3. halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s according to claim 1, it is characterised in that：It is described
Polypropylene be block copolymerization polypropylene, HOPP at least one, melt flow rate (MFR) be 1～20g/min, test
Condition is 230 DEG C/2.16kg.
4. halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s according to claim 1, it is characterised in that：It is described
Crosslinking agent be cumyl peroxide, dual-tert-butyl peroxy isopropyl base benzene, 2,5- dimethyl -2,5- bis- (tert-butyl hydroperoxide)
At least one in hexane.
5. halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s according to claim 1, it is characterised in that：It is described
Assistant crosslinking agent be N, N '-penylene BMI, Triallyl isocyanurate, trimethylolpropane trimethacrylate
In at least one.
6. halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s according to claim 1, it is characterised in that：It is described
Composite halogen-free fire retardant by APP, poly- triazine and organic nano silica (20～60) in mass ratio：(10～30)：
(1～5) constitute.
7. halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s according to claim 6, it is characterised in that：It is described
APP for epoxy resin modification the degree of polymerization more than 1000 crystal II-type ammonium polyphosphate；The structure of described poly- triazine
Formula is：Wherein 10≤n≤12.
8. halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s according to claim 1, it is characterised in that：It is described
Silane coupler be gamma-aminopropyl-triethoxy-silane, VTES, octyl group trimethoxy silane in extremely
Few one kind.
9. halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s according to claim 1, it is characterised in that：It is described
Lubricant be Tissuemat E, silicone, ethylenebis fatty acid amide, stearic acid pentaerythritol ester at least one；It is described
Antioxidant be Hinered phenols antioxidant, thio-2 acid dibasic acid esters kind antioxidant, phosphite ester kind antioxidant at least one.
10. the preparation of the halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s in claim 1～9 described in any one
Method, it is characterised in that：Comprise the following steps：
1) composite halogen-free fire retardant is added into high mixer, is well mixed, add silane coupler, be well mixed, premixed
Material I；
2) ethylene propylene diene rubber, polypropylene, premix compound I and lubricant are added into high mixer, is well mixed, then proceed to material
Corotating twin-screw machine, plasticizing, extruding pelletization, obtains premix compound II；
3) premix compound II, crosslinking agent, assistant crosslinking agent and antioxidant are added into high mixer, is well mixed, then proceed to material together
To parallel double-screw machine, plasticizing, extruding pelletization, halogen-free flameproof dynamic vulcanization EPDM/PP thermoplastic elastomer (TPE)s are obtained.
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