CN101434728B - Ultraviolet light crosslinked EPT rubber cable insulation material and preparation thereof - Google Patents
Ultraviolet light crosslinked EPT rubber cable insulation material and preparation thereof Download PDFInfo
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Abstract
The invention discloses an ultraviolet cross-linking EPDM (ethylene propylene diene monomer) rubber cable insulation material and a preparation method thereof. The method is characterized in that: by weight, 100 portions of EPDM rubber, 100 portions to 120 portions of inorganic filling, 0.5 portion to 5.0 portions of ultrasonic initiator, 0.5 portion to 5.0 portions of polyfunctional cross-linking agent, 5.0 portions to 10.0 portions of softener, 0.8 portion to 1.2 portions of silane coupling agent and 0.01 portion to 1.0 portion of complex antioxidant are evenly mixed and extruded at the temperature of 100 DEG C to 150 DEG C, thereby obtaining the ultraviolet cross-linking EPDM rubber cable insulation material; then the wire core is fused and extruded coating to form an insulation layer or a protective coating; and ultraviolet cross linking is carried out under 200nm to 400nm of wave length and 400mW/cm<2> to 2000mW/cm<2> of light intensity. The cable insulation material has tensile strength of larger than 6.5MPa, elongation at break of higher than 300 percent and volume resistivity of higher 10<12>Omega question mark cm, and can pass a thermal aging test under the temperature of135 DEG C for 168h.
Description
Technical field:
The invention belongs to rubber cable material preparation method technical field, particularly insulating material of ultraviolet light crosslinked EPT rubber cable and preparation method thereof.
Background technology:
Terpolymer EP rubber (EPDM) extensively is used as the wire cable insulating material because of having characteristics such as electrical property excellence, heat-resisting ageing-resisting performance high and low temperature snappiness be good, particularly mine cable.The cross-linking method of traditional terpolymer EP rubber wire cable insulating layer mainly adopts the superoxide continuous sulfurizing.European patent EP 1453866 has been described the material system of forming with EPDM, calcined kaolin, new LDPE (film grade), silane coupling agent and paraffin and under the chemically crosslinked condition of Di Cumyl Peroxide 99 thermal initiation, has been prepared crosslinked terpolymer EP rubber flexible cable; The tensile strength of goods is greater than 8.2MPa, and elongation at break is higher than 250%.U.S. Pat 2004242781 has been described with employing chemical crosslink techniques such as EPDM, kaolin, organo-peroxide, zinc oxide, Yellow Protopet 2A and oxidation inhibitor and has been prepared EPT rubber cable, and the tensile strength of goods is greater than 9MPa, and elongation at break is higher than 200%.The composite system that Chinese patent CN1783356 has described with EPDM, calcinated argil, anti-aging agent, organo-peroxide, coupling agent and wax adopts pressure terpolymer EP rubber insulated cable in the chemical crosslink technique preparation; Product tensile strength is greater than 6MPa, and elongation at break is higher than 300%.China's " elastomerics " magazine (2006 the 5th phase the 51st page) has been described with employing chemical crosslink techniques such as EPDM, lime carbonate, kaolin, talcum powder, Di Cumyl Peroxide 99, tenderizer and anti-aging agent and has been prepared EPT rubber cable; The tensile strength of goods is greater than 5MPa, and elongation at break is higher than 350%.But adopt the superoxide chemical crosslink technique to prepare EPT rubber cable and exist that production efficiency is low, technical process is complicated; Need carry out the crosslinked of long period through tens meters long HP steam curing tube; Power consumption is big, the efficiency utilization ratio is very low, and the effective rate of utilization of its heat energy is merely about 10% and waits deficiency.
In recent years, ultraviolet light cross-linking polyolefin insulation electric wire and cable has been obtained breakthrough in cable industry production.Chinese patent CN1218963 has described a kind of working method and photo-crosslinking equipment thereof that utilizes the ultraviolet light cross-linking polyolefin insulated cable of high voltage mercury lamp; The cable insulation material that this method is produced has excellent mechanical property, electrical property and resistance to elevated temperatures; And the facility investment of this method is few, and technology is simple, convenient operating maintenance.Chinese patent CN1919571 has described a kind of ultraviolet light cross-linking polyolefin insulation medium-pressure power cable new technology that adopts the electrodeless lamp of high light intensity microwave-excitation.Compare with the high voltage mercury lamp irradiation crosslinking, the photo-crosslinking speed of the electrodeless lamp of high light intensity is faster, and production efficiency is higher, and is stronger to the penetration depth of cross-linked polyolefin insulation layer.Meanwhile; The photo-crosslinking research work of pure EPDM rubber also early has report; U.S.'s " rubber chemistry with technology " magazine (Rubber Chemistry and Technology for example; 592:62,1989) described with crack type photoinitiator benzoin dimethylether and multi-group crosslink agent's orthoformic acid triacrylate as the photo-crosslinking system of EPDM rubber, utilized high voltage mercury lamp can make the thick pure EPDM glue-line of 10mm reach photo-crosslinking.U.S.'s " Polym Eng Sci " magazine (Polymer Engineering and Science and for example; 1798:43; 2003) and " journal of applied " (Journal of Applied Polymer Science, 3371:92,2004) delivered the research that employing dynamic light crosslinking prepares Vestolen PP 7052 (PP)/EPDM thermoplastic elastomer; The result shows that photo-crosslinking can improve the consistency of EPDM rubber particles and PP matrix; Impel rubber particles to be uniformly dispersed and refinement, not only increased the tensile strength of PP/EPDM blend, and significantly improved the low-temperature impact resistance of material.Yet; The photo-crosslinking of EPDM fails on cable industry is used, to achieve success always; Its major cause is that the EPDM rubber as cable application all need add the reinforcement inorganic fillings that accounts for 50-60% weight usually, and the EPDM rubber that contains a large amount of mineral fillers is difficult to make UV-light to pass and takes place crosslinked.Therefore, the photo-crosslinking technology that contains the ethylene propylene diene monomer (EPDM) material of a large amount of reinforcing fillers is not appeared in the newspapers so far, let alone they are in the electric wire Industrial Application.
Summary of the invention:
The object of the invention provides a kind of Insulating Material and Preparation Method of ultraviolet light crosslinked EPT rubber cable; To overcome the above-mentioned deficiency of existing crosslinking technological, obtain to have concurrently the photo-crosslinking EPT rubber cable of excellent mechanical performances, electrical property and resistance to elevated temperatures.
Ultraviolet light crosslinked EPT rubber cable insulation material of the present invention is characterised in that its component weight content is:
100 parts of terpolymer EP rubbers;
Mineral filler 100-120 part;
Ultraviolet initiator 0.5-5.0 part;
Multi-group crosslink agent 0.5-5.0 part;
Tenderizer 5.0-10.0 part;
Silane coupling agent 0.8-1.2 part;
Composite antioxidant 0.01-1.0 part.
The preparation method of ultraviolet light crosslinked EPT rubber cable insulation layer of the present invention; It is characterized in that: by weight with 100 parts of terpolymer EP rubbers, the mineral filler of 100-120 part, 0.5-5.0 part ultraviolet initiator, 0.5-5.0 part multi-group crosslink agent, 5.0-10.0 part tenderizer, 0.8-1.2 part silane coupling agent and 0.01-1.0 part composite antioxidant; Mixingly extrude after evenly at 100-150 ℃, obtain the ultraviolet light crosslinked EPT rubber cable material; On the cable conduction core, melt extrude this CABLE MATERIALS of coating then and become insulation layer or restrictive coating; And immediately at wavelength 200-400nm, light intensity 400-2000mW/cm
2UV-light under carry out ultraviolet light irradiation cross-linking.
Said terpolymer EP rubber comprises that the 3rd monomer is that the E type terpolymer EP rubber of vinylidene norbornylene, D type terpolymer EP rubber or the 3rd monomer that the 3rd monomer is NSC 7352 are 1, the H type terpolymer EP rubber of 4-hexadiene.
Said mineral filler is selected from WHITE CARBON BLACK, potter's clay or calcinated argil, talcum powder, lime carbonate, magnesiumcarbonate and/or aluminum oxide.
Said ultraviolet initiator can select intramolecularly cracking type for use or/and intermolecular hydrogen-capture-type light initiator; Wherein crack type photoinitiator can be selected benzoin dimethylether Irgacure 651 (BDK) for use; 2-methyl isophthalic acid-(4-methylthio group phenyl)-2-morpholinyl-1-acetone Irgacure 907 (I-907); Alpha-hydroxy phenyl isopropyl ketone Darocur 1173 (D-1173); Acyl group phosphorous oxides photoinitiator Irgacure 1700 (I-1700); Dialkoxy methyl phenyl ketone Irgacure 2959 (I-2959), 1-hydroxyl-cyclohexyl-phenyl ketone Irgacure 184 (I-184) or 2-phenyl benzyl-2-dimethyl amine-1-(4-morpholine benzyl phenyl) butanone Irgacure 369 (I-369); Said hydrogen-capture-type light initiator can be selected UVNUL MS-40 (BP), 2-chlorobenzene ketone (2-CBP), 4-chlorobenzene ketone (4-CBP), 4 for use, 4-dichloro benzophenone (4,4 '-DCBP), dodecyl UVNUL MS-40, Oxoxanthone, anthraquinone or Fluorenone.Above-mentioned light trigger can use separately, also can two kinds of same kind light triggers or two kinds of compound use of dissimilar light triggers, and preferable with the effect that adopts composite photoinitiator.
Said multi-group crosslink agent is selected from TAC (TAC), cyamelide triallyl (TAIC), hydroxymethyl-propane three (methyl) propenoate (TMPTA), trimethylolpropane tris allyl ether (TMPAE), tetramethylolmethane three allyl ethers (PETAE), tetramethylolmethane tetraene propyl ether or/and triglycol methacrylic ester (TEGMA), or its mixture.
Said tenderizer is selected from low molecular weight polyethylene, aromatic hydrocarbon oil, NO, Yellow Protopet 2A and/or microcrystalline wax.
Said silane coupling agent is selected from γ-methacryloxypropyl trimethoxy silane (KH570), vinyltriethoxysilane (SG-Si-151), γ-An Bingjisanyiyangjiguiwan (KH550), γ-(2,3-epoxy third oxygen) propyl trimethoxy silicane (KH560), gamma-mercaptopropyltriethoxysilane (KH580) and/or two-(the silica-based propyl group of γ-triethoxy) tetrasulfide (RSi-E).
Said oxidation inhibitor is selected from phenols, phosphorous acid esters, phosphoric acid ester or contains the thioesters kind antioxidant; Wherein phenolic antioxidant comprises 2; The 6-di-tert-butylphenol, 2,4; 6-tri-tert-butylphenol (oxidation inhibitor 246); 4,4 '-thiobis (6-tertiary butyl-3-methylphenol) (antioxidant 300 #) or four [methylene radical-3-(3 ', 5 '-di-tert-butyl-4 '-hydroxy phenyl) propionic acid] pentaerythritol ester (antioxidant 1010); Said phosphorous acid esters or phosphoric acid ester oxidation inhibitor comprise triphenyl phosphite (TPP), tricresyl phosphite (2,4-di-tert-butyl phenyl) ester (oxidation inhibitor 168), the different monooctyl ester of tricresyl phosphite (TIOP) or tricresyl phosphate benzene methyl; The said thioesters kind antioxidant that contains comprises Tyox B (DLTP), thio-2 acid bay octadecyl ester (LSTP) or thio-2 acid two (13) ester (DTDTP); Preferably with phenolic antioxidant and phosphorous acid esters or contain the composite composite antioxidant of thioesters class; Or with four [methylene radical-3-(3 '; 5 '-di-tert-butyl-4 '-hydroxy phenyl) propionic acid] pentaerythritol ester (antioxidant 1010) and triphenyl phosphite (TPP) or tricresyl phosphite (2,4-di-tert-butyl phenyl) ester (oxidation inhibitor 168) or the composite composite antioxidant of Tyox B (DLTP).
The present invention prepares the terpolymer EP rubber insulated cable that contains reinforcing filler through the ultraviolet light irradiation cross-linking method.Because having filled a large amount of mineral fillers is unfavorable for that UV-light sees through rubber insulation; The present invention adopts each component raw material proportioning and the optimizing condition of ultraviolet light irradiation in the optimization of C, thereby makes ultraviolet luminous energy penetrate the rubber insulation coating systems and to cause terpolymer EP rubber full cross-linked.The tensile strength of resulting product is greater than 6.5MPa, and elongation at break is greater than 300%, and volume specific resistance is higher than 10
12Ω cm can be through the heat ageing test of 135 ± 2 ℃ * 168h.Compare advantage such as ultraviolet light crosslinked EPT rubber cable insulation material of the present invention and preparation method thereof has that crosslinking process is simple, facility investment is low, convenient operating maintenance, production efficiency height, energy-conservation environmental protection again, product cost are low with the terpolymer EP rubber insulated cable of existing superoxide chemically crosslinked.
Embodiment
With embodiment the present invention is further specified below.
Embodiment 1:
In Banbury mixer, drop into 100 parts of E type EPDM, 40 parts in lime carbonate, 60 parts of talcum powder by weight; BDK0.8 part, 1 part of TMPTA, 5 parts of Yellow Protopet 2As; 0.8 part of silane coupling agent KH570,0.2 part of antioxidant 1010,0.1 part of DLTP; 100-150 ℃ of mixing 8-10 minute evenly after, be extruded into the sheet material through twin screw extruder again, obtain photo-crosslinking EPT rubber cable material; On the cable conduction core, melt extrude this CABLE MATERIALS of coating then and become insulation layer, and immediately at wavelength 200-400nm, light intensity 400-2000mW/cm
2Ultraviolet source under carry out the ultraviolet light irradiation cross-linking of insulation layer.
The detection data of the ultraviolet light crosslinked EPT rubber cable material property of this examples preparation are following:
* thermal ageing condition: 135 ± 2 ℃ * 168 hours.
Embodiment 2:
In Banbury mixer, drop into 100 parts of E type EPDM, 30 parts of nano-calcium carbonates, 30 parts of talcum powder by weight; 60 parts in potter's clay, 1.5 parts of BP, 1.5 parts of TAIC; 5 parts of Yellow Protopet 2As, 0.8 part of silane coupling agent KH570,0.2 part of antioxidant 1010; 0.1 part of DLTP mixingly is extruded into the sheet material after evenly at 100-150 ℃, and is identical among other operation and the embodiment 1.
The detection data of the ultraviolet light crosslinked EPT rubber cable material property of this examples preparation are following:
* thermal ageing condition: 135 ± 2 ℃ * 168 hours.
Embodiment 3:
In Banbury mixer, drop into 100 parts of E type EPDM, 50 parts of talcum powder, 70 parts of calcinated argils by weight; BDK1.2 part, 0.8 part of BP, 3 parts of TAIC; 5 parts of Yellow Protopet 2As, 1 part of silane coupling agent KH550,168 0.6 parts in oxidation inhibitor; 0.3 part of DTDTP mixingly is extruded into the sheet material after evenly at 100-150 ℃, and is identical among other operation and the embodiment 1.The detection data of the ultraviolet light crosslinked EPT rubber cable material property of this examples preparation are following:
* thermal ageing condition: 135 ± 2 ℃ * 168 hours.
Embodiment 4:
In Banbury mixer, drop into 100 parts of E type EPDM, 60 parts in lime carbonate, 50 parts in magnesiumcarbonate by weight; BDK1.2 part, 0.8 part of I-184,2.5 parts of TAIC; 5 parts of Yellow Protopet 2As, 1 part of silane coupling agent KH580,0.6 part of antioxidant 1010; 0.3 part of TPP mixingly is extruded into the sheet material after evenly at 100-150 ℃, and is identical among other operation and the embodiment 1.It is following that the ultraviolet light crosslinked EPT rubber cable material property of this examples preparation detects data:
* thermal ageing condition: 135 ± 2 ℃ * 168 hours.
Embodiment 5:
In Banbury mixer, drop into 100 parts of E type EPDM, 50 parts in magnesiumcarbonate, 60 parts of calcinated argils by weight; 4-CBP1 part, 651 1 parts of light triggers, 4 parts of TAIC; 10 parts of Yellow Protopet 2As, 1 part of silane coupling agent KH570, antioxidant 300 #0.5 part; 0.5 part of tricresyl phosphate benzene methyl mixingly is extruded into the sheet material after evenly at 100-150 ℃, and is identical among other operation and the embodiment 1.It is following that the ultraviolet light crosslinked EPT rubber cable material property of this examples preparation detects data:
* thermal ageing condition: 135 ± 2 ℃ * 168 hours.
Embodiment 6:
In Banbury mixer, drop into 100 parts of D type EPDM, 60 parts in lime carbonate, 50 parts of calcinated argils by weight; 4 parts of dodecyl UVNUL MS-40,2 parts of TMPAE, 10 parts of low molecular weight polyethylenes; 0.8 part of silane coupling agent SG-Si-151,0.5 part of antioxidant 1010,0.25 part of DLTP; Mixingly be extruded into the sheet material after evenly at 100-150 ℃, identical among other operation and the embodiment 1.It is following that the ultraviolet light crosslinked EPT rubber cable material property of this examples preparation detects data:
* thermal ageing condition: 135 ± 2 ℃ * 168 hours.
Embodiment 7:
In Banbury mixer, drop into 100 parts of E type EPDM, 30 parts in aluminum oxide, 70 parts of calcinated argils by weight; BDK1.2 part, 0.8 part of I-184,2.5 parts of TAIC; 5 parts of Yellow Protopet 2As, 1 part of silane coupling agent KH580,0.6 part of antioxidant 1010; 0.3 part of TPP mixingly is extruded into the sheet material after evenly at 100-150 ℃, and is identical among other operation and the embodiment 1.It is following that the ultraviolet light crosslinked EPT rubber cable material property of this examples preparation detects data:
* thermal ageing condition: 135 ± 2 ℃ * 168 hours.
Embodiment 8:
In Banbury mixer, drop into 100 parts of H type EPDM, 10 parts of thermal silicas, 30 parts in aluminum oxide, 80 parts of talcum powder by weight; 1 part of 4-CBP, 651 0.5 parts of light triggers, 2.5 parts of TAC; 5 parts of Yellow Protopet 2As, 1.2 parts of silane coupling agent RSi-E, 0.5 part of antioxidant 1010; 0.25 part of DLTP mixingly is extruded into the sheet material after evenly at 100-150 ℃, and is identical among other operation and the embodiment 1.It is following that the ultraviolet light crosslinked EPT rubber cable material property of this examples preparation detects data:
* thermal ageing condition: 135 ± 2 ℃ * 168 hours.
Claims (4)
1. ultraviolet light crosslinked EPT rubber cable insulation material is characterised in that its component weight content is:
100 parts of terpolymer EP rubbers;
Mineral filler 100-120 part;
Ultraviolet initiator 0.5-5.0 part;
Multi-group crosslink agent 0.5-5.0 part;
Tenderizer 5.0-10.0 part;
Silane coupling agent 0.8-1.2 part;
Oxidation inhibitor 0.01-1.0 part;
Said terpolymer EP rubber comprises that the 3rd monomer is that the E type terpolymer EP rubber of vinylidene norbornylene, D type terpolymer EP rubber or the 3rd monomer that the 3rd monomer is NSC 7352 are 1, the H type terpolymer EP rubber of 4-hexadiene;
Said mineral filler is selected from WHITE CARBON BLACK, potter's clay or calcinated argil, talcum powder, lime carbonate, magnesiumcarbonate and/or aluminum oxide;
Said ultraviolet initiator is selected intramolecularly crack type photoinitiator benzoin dimethylether for use; 2-methyl isophthalic acid-(4-methylthio group phenyl)-2-morpholinyl-1-acetone; The Alpha-hydroxy phenyl isopropyl ketone; Acyl group phosphorous oxides photoinitiator, dialkoxy methyl phenyl ketone, 1-hydroxyl-cyclohexyl-phenyl ketone or 2-phenyl benzyl-2-dimethyl amine-1-(4-morpholine benzyl phenyl) butanone; Or/and intermolecular hydrogen-capture-type light initiator UVNUL MS-40,2-chlorobenzene ketone, 4-chlorobenzene ketone, 4,4-dichloro benzophenone, dodecyl UVNUL MS-40, Oxoxanthone, anthraquinone or Fluorenone;
Said multi-group crosslink agent is selected from TAC, cyamelide triallyl, hydroxymethyl-propane three (methyl) propenoate, trimethylolpropane tris allyl ether, tetramethylolmethane three allyl ethers, tetramethylolmethane tetraene propyl ether or/and the triglycol methacrylic ester, or its mixture;
Said tenderizer is selected from low molecular weight polyethylene, aromatic hydrocarbon oil, NO, Yellow Protopet 2A and/or microcrystalline wax;
Said silane coupling agent is selected from γ-methacryloxypropyl trimethoxy silane, vinyltriethoxysilane, γ-An Bingjisanyiyangjiguiwan, γ-(2,3-epoxy third oxygen) propyl trimethoxy silicane, gamma-mercaptopropyltriethoxysilane and/or two-(the silica-based propyl group of γ-triethoxy) tetrasulfide;
Said oxidation inhibitor is selected from 2,6-di-tert-butylphenol, 2,4,6-tri-tert-butylphenol, 4,4 '-thiobis (6-tertiary butyl-3-methylphenol) or four [methylene radical-3-(3 ', 5 '-di-tert-butyl-4 '-hydroxy phenyl) propionic acid] pentaerythritol ester; Or triphenyl phosphite, tricresyl phosphite (2,4-di-tert-butyl phenyl) ester, the different monooctyl ester of tricresyl phosphite or tricresyl phosphate benzene methyl; Or contain thioesters kind antioxidant Tyox B, thio-2 acid bay octadecyl ester or thio-2 acid two (13) ester; Or with phenolic antioxidant and phosphorous acid esters or contain the composite composite antioxidant of thioesters class.
2. ultraviolet light cross-linking terpolymer EP rubber insulated cable material as claimed in claim 1; Be characterised in that said with phenolic antioxidant and phosphorous acid esters or contain the composite composite antioxidant of thioesters class; For [methylene radical-3-(3 ' with four; 5 '-di-tert-butyl-4 '-hydroxy phenyl) propionic acid] pentaerythritol ester and triphenyl phosphite or tricresyl phosphite (2,4-di-tert-butyl phenyl) ester or the composite composite antioxidant of Tyox B.
3. method that adopts the said cable insulating material of claim 1 to prepare ultraviolet light crosslinked EPT rubber cable insulation layer or restrictive coating; It is characterized in that: by weight with 100 parts of terpolymer EP rubbers, the mineral filler of 100-120 part, 0.5-5.0 part ultraviolet initiator, 0.5-5.0 part multi-group crosslink agent, 5.0-10.0 part tenderizer, 0.8-1.2 part silane coupling agent and 0.01-1.0 part oxidation inhibitor; Mixingly extrude after evenly at 100-150 ℃, obtain the ultraviolet light crosslinked EPT rubber cable material; On the cable conduction core, melt extrude this CABLE MATERIALS of coating then and become insulation layer or restrictive coating; And immediately at wavelength 200-400nm, light intensity 400-2000mW/cm
2UV-light under carry out ultraviolet light irradiation cross-linking;
Said terpolymer EP rubber comprises that the 3rd monomer is that the E type terpolymer EP rubber of vinylidene norbornylene, D type terpolymer EP rubber or the 3rd monomer that the 3rd monomer is NSC 7352 are 1, the H type terpolymer EP rubber of 4-hexadiene;
Said mineral filler is selected from WHITE CARBON BLACK, potter's clay or calcinated argil, talcum powder, lime carbonate, magnesiumcarbonate and/or aluminum oxide;
Said ultraviolet initiator is selected intramolecularly crack type photoinitiator benzoin dimethylether for use; 2-methyl isophthalic acid-(4-methylthio group phenyl)-2-morpholinyl-1-acetone; The Alpha-hydroxy phenyl isopropyl ketone; Acyl group phosphorous oxides photoinitiator, dialkoxy methyl phenyl ketone, 1-hydroxyl-cyclohexyl-phenyl ketone or 2-phenyl benzyl-2-dimethyl amine-1-(4-morpholine benzyl phenyl) butanone; Or/and intermolecular hydrogen-capture-type light initiator UVNUL MS-40,2-chlorobenzene ketone, 4-chlorobenzene ketone, 4,4-dichloro benzophenone, dodecyl UVNUL MS-40, Oxoxanthone, anthraquinone or Fluorenone;
Said multi-group crosslink agent is selected from TAC, cyamelide triallyl, hydroxymethyl-propane three (methyl) propenoate, trimethylolpropane tris allyl ether, tetramethylolmethane three allyl ethers, tetramethylolmethane tetraene propyl ether or/and the triglycol methacrylic ester, or its mixture;
Said tenderizer is selected from low molecular weight polyethylene, aromatic hydrocarbon oil, NO, Yellow Protopet 2A and/or microcrystalline wax;
Said silane coupling agent is selected from γ-methacryloxypropyl trimethoxy silane, vinyltriethoxysilane, γ-An Bingjisanyiyangjiguiwan, γ-(2,3-epoxy third oxygen) propyl trimethoxy silicane, gamma-mercaptopropyltriethoxysilane and/or two-(the silica-based propyl group of γ-triethoxy) tetrasulfide;
Said oxidation inhibitor is selected from phenolic antioxidant 2,6-di-tert-butylphenol, 2,4,6-tri-tert-butylphenol, 4,4 '-thiobis (6-tertiary butyl-3-methylphenol) or four [methylene radical-3-(3 ', 5 '-di-tert-butyl-4 '-hydroxy phenyl) propionic acid] pentaerythritol ester; Or triphenyl phosphite, tricresyl phosphite (2,4-di-tert-butyl phenyl) ester, the different monooctyl ester of tricresyl phosphite or tricresyl phosphate benzene methyl; Or contain thioesters kind antioxidant Tyox B, thio-2 acid bay octadecyl ester or thio-2 acid two (13) ester; Or with phenolic antioxidant and phosphorous acid esters or contain the composite composite antioxidant of thioesters class.
4. the method for preparing ultraviolet light crosslinked EPT rubber cable insulation layer or restrictive coating like the said cable insulating material of the said employing of claim 3 claim 1; Be characterised in that said with phenolic antioxidant and phosphorous acid esters or contain the composite composite antioxidant of thioesters class; For [methylene radical-3-(3 ' with four; 5 '-di-tert-butyl-4 '-hydroxy phenyl) propionic acid] pentaerythritol ester and triphenyl phosphite or tricresyl phosphite (2,4-di-tert-butyl phenyl) ester or the composite composite antioxidant of Tyox B.
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2008
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