CN102936369A - Silane self-crosslinked polyolefin flexible insulation cable material and preparation method thereof - Google Patents
Silane self-crosslinked polyolefin flexible insulation cable material and preparation method thereof Download PDFInfo
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- CN102936369A CN102936369A CN2012104888516A CN201210488851A CN102936369A CN 102936369 A CN102936369 A CN 102936369A CN 2012104888516 A CN2012104888516 A CN 2012104888516A CN 201210488851 A CN201210488851 A CN 201210488851A CN 102936369 A CN102936369 A CN 102936369A
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- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 229910000077 silane Inorganic materials 0.000 title claims abstract description 53
- 229920000098 polyolefin Polymers 0.000 title claims abstract description 43
- 239000000463 material Substances 0.000 title claims abstract description 39
- 238000009413 insulation Methods 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 28
- 238000004132 cross linking Methods 0.000 claims abstract description 50
- 229920001577 copolymer Polymers 0.000 claims abstract description 20
- 229920013716 polyethylene resin Polymers 0.000 claims abstract description 16
- 239000003999 initiator Substances 0.000 claims abstract description 14
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 13
- 239000003054 catalyst Substances 0.000 claims abstract description 12
- 239000000314 lubricant Substances 0.000 claims abstract description 12
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 11
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 9
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 9
- SJECZPVISLOESU-UHFFFAOYSA-N 3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCN SJECZPVISLOESU-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000003112 inhibitor Substances 0.000 claims description 29
- 230000003647 oxidation Effects 0.000 claims description 29
- 238000007254 oxidation reaction Methods 0.000 claims description 29
- 238000006555 catalytic reaction Methods 0.000 claims description 21
- 239000004971 Cross linker Substances 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 11
- 238000002844 melting Methods 0.000 claims description 9
- 230000008018 melting Effects 0.000 claims description 9
- 229920001897 terpolymer Polymers 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 5
- DMWVYCCGCQPJEA-UHFFFAOYSA-N 2,5-bis(tert-butylperoxy)-2,5-dimethylhexane Chemical compound CC(C)(C)OOC(C)(C)CCC(C)(C)OOC(C)(C)C DMWVYCCGCQPJEA-UHFFFAOYSA-N 0.000 claims description 4
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical group C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 4
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 4
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 claims description 4
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 claims description 4
- 238000005469 granulation Methods 0.000 claims description 4
- 230000003179 granulation Effects 0.000 claims description 4
- 229920001526 metallocene linear low density polyethylene Polymers 0.000 claims description 4
- -1 polyethylene Polymers 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 3
- 230000002902 bimodal effect Effects 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 2
- VWGKEVWFBOUAND-UHFFFAOYSA-N 4,4'-thiodiphenol Chemical compound C1=CC(O)=CC=C1SC1=CC=C(O)C=C1 VWGKEVWFBOUAND-UHFFFAOYSA-N 0.000 claims description 2
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 2
- 239000005639 Lauric acid Substances 0.000 claims description 2
- 150000001412 amines Chemical class 0.000 claims description 2
- 229910052731 fluorine Inorganic materials 0.000 claims description 2
- 239000011737 fluorine Substances 0.000 claims description 2
- 239000002530 phenolic antioxidant Substances 0.000 claims description 2
- 150000008301 phosphite esters Chemical class 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 2
- 230000003197 catalytic effect Effects 0.000 abstract 2
- 229920002943 EPDM rubber Polymers 0.000 abstract 1
- 239000003431 cross linking reagent Substances 0.000 abstract 1
- 239000002994 raw material Substances 0.000 description 13
- 239000012774 insulation material Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 4
- 239000000047 product Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- AGXUVMPSUKZYDT-UHFFFAOYSA-L barium(2+);octadecanoate Chemical compound [Ba+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O AGXUVMPSUKZYDT-UHFFFAOYSA-L 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 235000019359 magnesium stearate Nutrition 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 description 1
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- Insulated Conductors (AREA)
- Organic Insulating Materials (AREA)
Abstract
The invention relates to a silane self-crosslinked polyolefin flexible insulation cable material and a preparation method thereof. The cable material comprises a grafting component A and a catalytic component B in a weight ratio of 95:(4-6), wherein the grafting component A comprises the following components in parts by weight: 10-35 parts of high-strength polyethylene resin, 25-55 parts of ethylene-octylene copolymer, 20-65 parts of ethylene propylene diene monomer, 0.1-4 parts of 3-aminopropyltrimethoxysilane, 1-6 parts of silane crosslinking agent, 0.5-1.5 parts of grafting initiator, 0.2-2 parts of lubricant and 0.1-5 parts of first antioxidant; and the catalytic component B comprises the following components in parts by weight: 100 parts of ethylene-vinyl acetate copolymer and/or ethylene-octylene copolymer, 1-5 parts of second antioxidant, 1-10 parts of antioxidant and 1-8 parts of crosslinking catalyst. The cable material provided by the invention has the advantages of excellent temperature tolerance, high softness and high oil resistance, and is applicable to the field of electromechanical devices.
Description
Technical field
The present invention relates to a kind of polyolefin insulation material that can be applicable to the electromechanical equipment field, be specifically related to a kind of silane self crosslinking polyolefin flexible insulation material, its preparation method and by its prepared cable.
Background technology
At present along with national grid carrying forward vigorously of upgrade of rural power grids particularly, the quickening that urbanization is marched into the arena, and being gradually improved of urban rail transit construction, increasing with the demand of high temperature resistant soft polyolefin insulation material to electromechanical equipment, but this type of Insulation Material mainly all is the irradiation crosslinked polyolefin insulating material or needs poach could realize crosslinked silane cross-linked polyolefin Insulation Material at present, all has the higher problem of cost.
Chinese invention patent application 200810023270.9 discloses a kind of boiling-free silicane cross-linking polyolefin composition.Although the CABLE MATERIALS of this patent disclosure has realized the characteristics of self-crosslinking, this Insulation Material only can satisfy life-time service under the lesser temps (90 ℃), and does not possess flexible nature, thereby can't be used for electromechanical equipment.
Summary of the invention
Technical problem to be solved by this invention is to overcome the deficiencies in the prior art, and a kind of silane self crosslinking polyolefin flexible insulation CABLE MATERIALS that can be applicable to electromechanical equipment is provided.
The present invention also will provide a kind of preparation method of silane self crosslinking polyolefin flexible insulation CABLE MATERIALS simultaneously.
For solving the problems of the technologies described above, a kind of technical scheme that the present invention takes is as follows:
A kind of silane self crosslinking polyolefin flexible insulation CABLE MATERIALS, it comprises that weight proportion is grafting A component and the catalysis B component of 95:4 ~ 6, wherein:
Each component and each component proportion are in the grafting A component: high-strength polyethylene resin 10 ~ 35 weight parts, ethylene-octene copolymer 25 ~ 55 weight parts, terpolymer EP rubber 20 ~ 65 weight parts, 3-aminopropyl trimethoxysilane 0.1 ~ 4 weight part, silane crosslinker 1 ~ 6 weight part, grafting initiator 0.5 ~ 1.5 weight part, lubricant 0.2 ~ 2 weight part, the first oxidation inhibitor 0.1 ~ 5 weight part, wherein: the high-strength polyethylene resin, ethylene-octene copolymer and terpolymer EP rubber three's total amount is 100 parts, the melting index of described high-strength polyethylene resin is 0.1g/10min ~ 3.5g/10min, and tensile strength is more than or equal to 35MPa; Described the first oxidation inhibitor is to be selected from antioxidant 1010, irgasfos 168 and the antioxidant 300 one or more;
Each component and each component proportion are in the catalysis B component: ethylene-vinyl acetate copolymer or ethylene-octene copolymer or the mixture of the two 100 weight parts; The second oxidation inhibitor 1 ~ 5 weight part; The 3rd oxidation inhibitor 1 ~ 10 weight part; And 1 ~ 8 part of crosslinking catalyst, wherein, the second oxidation inhibitor is that oxidation inhibitor 1024, the three oxidation inhibitor are to be selected from one or more of phenolic antioxidant, amine antioxidants, thiobisphenol kind antioxidant and phosphite ester kind antioxidant.
According to further embodiment of the present invention:
Silane crosslinker in the described grafting A component can and be preferably and is selected from vinyltrimethoxy silane, vinyltriethoxysilane, γ-aminopropyl triethoxysilane and the diethylenetriamine base propyl trimethoxy silicane one or more.
Lubricant in the described grafting A component can and be preferably and is selected from fluorine-containing rheological agent (PPA), silicone master batch and the stearate one or more.Wherein, stearate can be for being selected from one or more the combination in Zinic stearas, Magnesium Stearate and the barium stearate.
Grafting initiator in the described grafting A component can and be preferably dicumyl peroxide (DCP) or 2,5-dimethyl-2,5-bis(t-butylperoxy) hexane (DBPH) or the mixture of the two.
Preferably, the high-strength polyethylene resin in the described grafting A component is metallocene PE and/or bimodal polyethylene.
Crosslinking catalyst in the described catalysis B component can be organic tin catalyzer or ester class catalyzer.For example, crosslinking catalyst can be for being selected from dibutyl tin laurate, two lauric acid, two fourth tin octylates and the cyanacrylate one or more.
Preferably, contain simultaneously ethylene-vinyl acetate copolymer and ethylene-octene copolymer in the catalysis B component, the weight ratio of the two is 1:0.4 ~ 3.
Preferably, the weight ratio of described grafting A component and catalysis B component is 95:5.
According to the present invention, the ethylene-octene copolymer that uses in the grafting A component preferably possesses following features: melting index is 1 ~ 2g/10min; Ethylene-octene copolymer in the catalysis B component preferably possesses following features: melting index is 5 ~ 10g/10min.
The another technical scheme that the present invention takes is: a kind of preparation method of above-mentioned silane self crosslinking polyolefin flexible insulation CABLE MATERIALS, it comprises the steps:
(1) preparation grafting A component: according to formula rate silane crosslinker, grafting initiator, the first oxidation inhibitor, 3-aminopropyl trimethoxysilane are mixed, get crosslinked mixed solution; By prescription that high-strength polyethylene resin, ethylene-octene copolymer, terpolymer EP rubber, mix lubricant is even, add in the BUSS mixing roll hopper, claim the crosslinked mixed solution of accurate weighing to enter in the BUSS mixing roll by lance injected with liquid simultaneously, through BUSS machine mixing granulator, the water extracter dehydration, the dry grafting A component that gets of drying machine;
(2), preparation catalysis B component: ethylene-vinyl acetate copolymer or ethylene-octene copolymer or the mixture of the two, the second oxidation inhibitor, the 3rd oxidation inhibitor and crosslinking catalyst are mixed by prescription, extrude through twin screw extruder, water stretching and granulation, drying make catalysis B component;
(3), step (1) gained grafting A component and step (2) gained catalysis B component are namely got described silane self crosslinking polyolefin flexible insulation CABLE MATERIALS by weight aluminum-plastic packaged.
Further, in rapid (1), the temperature setting of BUSS mixing roll is set to: 155 ℃ ~ 185 ℃ of compression sections, 195 ℃ ~ 215 ℃ of homogenizing zones, 130 ℃ ~ 145 ℃ of head temperatures.
In the step (2), the feeding section of twin screw extruder, compression section, homogenizing zone and head temperature are followed successively by 120 ℃ ~ 130 ℃, 135 ℃ ~ 155 ℃, 160 ℃ ~ 175 ℃ and 165 ℃ ~ 185 ℃.
Among the present invention, whole described raw materials all can prepare by being purchased and/or taking known means, and satisfy the requirement of stdn chemical product.
The present invention also relates to a kind of silane self crosslinking polyolefin flexible insulation cable, and it is to be after 95:4 ~ 6 mix, to extrude gained through the cable forcing machine by above-mentioned grafting A component and above-mentioned catalysis B component according to weight proportion.
The invention still further relates to above-mentioned silane self crosslinking polyolefin flexible insulation cable application in the purposes in electromechanical equipment field.
Because the enforcement of above technical scheme, the present invention compared with prior art has following advantage:
Silane self crosslinking polyolefin flexible insulation CABLE MATERIALS provided by the invention is a kind of novel silane self crosslinking polyolefin flexible insulation CABLE MATERIALS, it has superior heat resistance (125 ℃), aging resistance, softness, oil resistance, and processing characteristics is excellent, and cost is low, can be applicable to the electromechanical equipment field.
The preparation method of silane self crosslinking polyolefin flexible insulation CABLE MATERIALS provided by the invention compares with the preparation method of traditional silane cross-linked polyolefin Insulation Material, effectively guaranteed the graft(ing) degree and the generation that prevents precrosslink of material, the gained CABLE MATERIALS has more excellent heat resistance and softness.Compare with the existing cable product that is used for the electromechanical equipment field, preparation of the present invention is simpler, and cost is lower.
Embodiment
The raw material that adopts in following examples is commercially available standard industry product.
Embodiment 1
Present embodiment provides a kind of preparation method of 125 ℃ of silane self crosslinking polyolefin flexible insulation CABLE MATERIALS, and the raw material of employing and consumption are referring to table 1, wherein:
The high tensile polyvinyl resin is that Borealis produces bimodal polyethylene, the trade mark: FB2230, and melting index is 0.2g/10min; The mooney viscosity of terpolymer EP rubber is 25, and propylene content is 25wt%; With ethylene-octene copolymer, Shore A hardness is 75; The first oxidation inhibitor is antioxidant 300, and lubricant is PPA, and the grafting initiator is DCP.
The vinyl acetate content of ethylene-vinyl acetate copolymer is 28wt%; Silane crosslinker is vinyltrimethoxy silane; The 3rd oxidation inhibitor comprises antioxidant 1010 and the irgasfos 168 that weight ratio is 1:1;
Crosslinking catalyst is dibutyl tin laurate.
The preparation method of 125 ℃ of silane self crosslinking polyolefin flexible insulation CABLE MATERIALS comprises the steps:
(1) with silane crosslinker, grafting initiator, antioxidant 300,3-aminopropyl trimethoxysilane, be mixed into crosslinked mixed solution; Then high-strength polyethylene resin, ethylene-octene copolymer (melting index is 2.0g/10min), terpolymer EP rubber, mix lubricant are evenly added in the BUSS mixing roll hopper, claim the crosslinked mixed solution of accurate weighing to enter in the BUSS mixing roll by lance injected with liquid simultaneously, through BUSS machine mixing granulator, the water extracter dehydration, the dry grafting A component that gets of drying machine.
(2) ethylene-vinyl acetate copolymer and ethylene-octene copolymer (melting index is 8.0g/10min), oxidation inhibitor 1024, the 3rd oxidation inhibitor and crosslinking catalyst are mixed by proportioning, through twin-screw extrusion, water stretching and granulation, make catalysis B component, wherein: feeding section, compression section, homogenizing zone and the head temperature of twin screw extruder are followed successively by 120 ~ 130 ℃, 135 ~ 155 ℃, 160 ~ 175 ℃ and 165 ~ 185 ℃ in the step (2).
(3) with step (1) gained grafting A component and step (2) gained catalysis B component 95:5 proportioning packing by weight ratio, and get final product.
Embodiment 2
Present embodiment provides a kind of preparation method of 125 ℃ of silane self crosslinking polyolefin flexible insulation CABLE MATERIALS, and the raw material that it adopts and consumption be referring to table 1, and the high-strength polyethylene resin is all identical with embodiment 1 with raw material outside the grafting initiator.
In this example, selected high-strength polyethylene resin is that Exxon Corporation produces the metallocene PE trade mark: 3518CB, its melting index is 3.5g/10min.
In this example, the grafting initiator is 2,5-dimethyl-2,5-bis(t-butylperoxy) hexane (DBPH).
The preparation process of 125 ℃ of silane self crosslinking polyolefin flexible insulation CABLE MATERIALS is with embodiment 1.
Embodiment 3
Present embodiment provides a kind of preparation method of 125 ℃ of silane self crosslinking polyolefin flexible insulation CABLE MATERIALS, and the raw material that it adopts and consumption are referring to table 1, and the raw material outside silane crosslinker, lubricant and the 3rd oxidation inhibitor is all identical with embodiment 1.
In this example, silane crosslinker is vinyltriethoxysilane; Lubricant is silicone master batch; The 3rd oxidation inhibitor comprises antioxidant 1010 and the irgasfos 168 that weight ratio is 2:1.
The preparation process of 125 ℃ of silane self crosslinking polyolefin flexible insulation CABLE MATERIALS is with embodiment 1.
Embodiment 4
Present embodiment provides a kind of preparation method of 125 ℃ of silane self crosslinking polyolefin flexible insulation CABLE MATERIALS, and the raw material that it adopts and consumption be referring to table 1, and the high-strength polyethylene resin is all identical with embodiment 1 with raw material outside the silane crosslinker.
In this example, selected high-strength polyethylene resin is that Exxon Corporation produces the metallocene PE trade mark: 3518CB, and its melting index is 3.5g/10min; Silane crosslinker is vinyltriethoxysilane.
The preparation process of 125 ℃ of silane self crosslinking polyolefin flexible insulation CABLE MATERIALS is with embodiment 1.
Embodiment 5
Present embodiment provides a kind of preparation method of 125 ℃ of silane self crosslinking polyolefin flexible insulation CABLE MATERIALS, and the raw material that it adopts and consumption be referring to table 1, and the grafting initiator is all identical with embodiment 1 with raw material outside the crosslinking catalyst agent.
In this example, the grafting initiator is 2,5-dimethyl-2,5-bis(t-butylperoxy) hexane (DBPH); The crosslinking catalyst stannous octoate.
The preparation process of 125 ℃ of silane self crosslinking polyolefin flexible insulation CABLE MATERIALS is with embodiment 1.
Comparative Examples 1
This Comparative Examples provides a kind of preparation method of 125 ℃ of silane self crosslinking polyolefin flexible insulation CABLE MATERIALS, and the raw material that it adopts and consumption are fully with embodiment 1, and different is that it prepares as follows:
(1) terpolymer EP rubber, ethylene-octene copolymer, polyethylene, silane crosslinker, grafting initiator, oxidation inhibitor, lubricant and anti-precrosslinker are evenly mixed by proportioning, through the granulation of reciprocating type BUSS machine forcing machine fusion-grafting, drying gets grafting A component
(2) ethylene-vinyl acetate copolymer and ethylene-octene copolymer, oxidation inhibitor 1024, the second oxidation inhibitor and crosslinking catalyst are mixed by proportioning, through the twin screw extruder extruding pelletization, make catalysis B component.
(3) step (1) gained grafting A component and step (2) gained catalysis B component are packed by proportioning, be 125 ℃ of silane self crosslinking polyolefin flexible insulation CABLE MATERIALS.
The raw material of table 1 embodiment 1 ~ 5 forms
125 ℃ of silane self crosslinking polyolefin flexible insulation CABLE MATERIALS of embodiment 1 ~ 5 and Comparative Examples 1 preparation are made specimen (1mm thickness sample at 25 ℃, is placed 120h naturally under 65% ambient temperature conditions), and properties is tested.The result is referring to table 2.For ease of relatively, also in table 2, listed the desired value of this material company standard defined.
The performance of the silane self crosslinking polyolefin flexible insulation CABLE MATERIALS of table 2 embodiment 1 ~ 5 and Comparative Examples 1
More than the present invention has been done detailed description; its purpose is to allow the personage that is familiar with this art can understand content of the present invention and is implemented; can not limit protection scope of the present invention with this; and the invention is not restricted to the embodiments described; the equivalence that all spirit according to the present invention are done changes or modifies, and all should be encompassed in protection scope of the present invention.
Claims (10)
1. silane self crosslinking polyolefin flexible insulation CABLE MATERIALS, it is characterized in that: it comprises that weight proportion is grafting A component and the catalysis B component of 95:4 ~ 6, wherein:
Each component and each component proportion are in the grafting A component: high-strength polyethylene resin 10 ~ 35 weight parts, ethylene-octene copolymer 25 ~ 55 weight parts, terpolymer EP rubber 20 ~ 65 weight parts, 3-aminopropyl trimethoxysilane 0.1 ~ 4 weight part, silane crosslinker 1 ~ 6 weight part, grafting initiator 0.5 ~ 1.5 weight part, lubricant 0.2 ~ 2 weight part, the first oxidation inhibitor 0.1 ~ 5 weight part, wherein: the high-strength polyethylene resin, ethylene-octene copolymer and terpolymer EP rubber three's total amount is 100 parts, the melting index of described high-strength polyethylene resin is 0.1g/10min ~ 3.5g/10min, and tensile strength is more than or equal to 35MPa; Described the first oxidation inhibitor is to be selected from antioxidant 1010, irgasfos 168 and the antioxidant 300 one or more;
Each component and each component proportion are in the catalysis B component: ethylene-vinyl acetate copolymer or ethylene-octene copolymer or the mixture of the two 100 weight parts; The second oxidation inhibitor 1 ~ 5 weight part; The 3rd oxidation inhibitor 1 ~ 10 weight part; And 1 ~ 8 part of crosslinking catalyst, wherein, the second oxidation inhibitor is that oxidation inhibitor 1024, the three oxidation inhibitor are to be selected from one or more of phenolic antioxidant, amine antioxidants, thiobisphenol kind antioxidant and phosphite ester kind antioxidant.
2. silane self crosslinking polyolefin flexible insulation CABLE MATERIALS according to claim 1 is characterized in that: the silane crosslinker in the described grafting A component is to be selected from vinyltrimethoxy silane, vinyltriethoxysilane, γ-aminopropyl triethoxysilane and the diethylenetriamine base propyl trimethoxy silicane one or more.
3. silane self crosslinking polyolefin flexible insulation CABLE MATERIALS according to claim 1 is characterized in that: the lubricant in the described grafting A component is to be selected from fluorine-containing rheological agent, silicone master batch and the stearate one or more.
4. silane self crosslinking polyolefin flexible insulation CABLE MATERIALS according to claim 1, it is characterized in that: the grafting initiator in the described grafting A component is dicumyl peroxide or 2,5-dimethyl-2,5-bis(t-butylperoxy) hexane or the mixture of the two.
5. silane self crosslinking polyolefin flexible insulation CABLE MATERIALS according to claim 1, it is characterized in that: the high-strength polyethylene resin in the described grafting A component is metallocene PE and/or bimodal polyethylene.
6. silane self crosslinking polyolefin flexible insulation CABLE MATERIALS according to claim 1 or 5 is characterized in that: the crosslinking catalyst in the described catalysis B component is to be selected from dibutyl tin laurate, two lauric acid, two fourth tin octylates and the cyanacrylate one or more.
7. the preparation method such as the described silane self crosslinking polyolefin of each claim flexible insulation CABLE MATERIALS in the claim 1 to 6 is characterized in that: comprise the steps:
(1) preparation grafting A component: according to formula rate silane crosslinker, grafting initiator, the first oxidation inhibitor, 3-aminopropyl trimethoxysilane are mixed, get crosslinked mixed solution; By prescription that high-strength polyethylene resin, ethylene-octene copolymer, terpolymer EP rubber, mix lubricant is even, add in the BUSS mixing roll hopper, claim the crosslinked mixed solution of accurate weighing to enter in the BUSS mixing roll by lance injected with liquid simultaneously, through BUSS machine mixing granulator, the water extracter dehydration, the dry grafting A component that gets of drying machine;
(2), preparation catalysis B component: ethylene-vinyl acetate copolymer or ethylene-octene copolymer or the mixture of the two, the second oxidation inhibitor, the 3rd oxidation inhibitor and crosslinking catalyst are mixed by prescription, extrude through twin screw extruder, water stretching and granulation, drying make catalysis B component;
(3), step (1) gained grafting A component and step (2) gained catalysis B component are namely got described silane self crosslinking polyolefin flexible insulation CABLE MATERIALS by weight aluminum-plastic packaged.
8. preparation method according to claim 7 is characterized in that: in rapid (1), the temperature setting of BUSS mixing roll is set to: 155 ℃ ~ 185 ℃ of compression sections, 195 ℃ ~ 215 ℃ of homogenizing zones, 130 ℃ ~ 145 ℃ of head temperatures.
9. preparation method according to claim 7, it is characterized in that: in the step (2), the feeding section of twin screw extruder, compression section, homogenizing zone and head temperature are followed successively by 120 ℃ ~ 130 ℃, 135 ℃ ~ 155 ℃, 160 ℃ ~ 175 ℃ and 165 ℃ ~ 185 ℃.
10. silane self crosslinking polyolefin flexible insulation cable, it is characterized in that: it is to be after 95:4 ~ 6 mix, to extrude gained through the cable forcing machine by the described catalysis B of each claim component in each claim described grafting A component and the claim 1 to 6 in the claim 1 to 6 according to weight proportion.
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