CN1415657A - Radiation crosslinking polyvinyl chloride material and its prepn. method - Google Patents
Radiation crosslinking polyvinyl chloride material and its prepn. method Download PDFInfo
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- CN1415657A CN1415657A CN 02145262 CN02145262A CN1415657A CN 1415657 A CN1415657 A CN 1415657A CN 02145262 CN02145262 CN 02145262 CN 02145262 A CN02145262 A CN 02145262A CN 1415657 A CN1415657 A CN 1415657A
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Abstract
A radiation cross-linked polyvinyl chloride material is prepared from polyvinyl chloride, nitrile rubber, cross-linking agent, plasticizer, stabilizer, lubricant, antioxidizing agent and filler through mixing and radiating by electronic accelerator. Its advantages are high gel content up to 84-95%, and better mechanical performance, and antiwear and refractory nature.
Description
Technical field
The present invention relates to the radiotreatment of polymer substance, especially about a kind of radiation crosslinking pvc material and preparation method thereof.
Background technology
The radiotechnology of pvc material has just begun research in nineteen fifty-nine, and pvc material is carried out radiation, and degraded to a certain degree also takes place in the time of crosslinked in the material generation.In order to improve cross-linking efficiency, reduce palliating degradation degree, the control of radiation process condition is quite harsh.Early eighties has carried out systematic research to the Radiation Crosslinking of PVC reaction mechanism, and tentatively proves and improve cross-linking efficiency by the cross-linking process that some polyfunctional group unsaturated monomers can the sensitization polyvinyl chloride.People such as T.N.Bowmer had studied the PVC/TMPTMA cross-linking system in 1981, control certain process conditions can obtain the high performance radiation cross-linking pvc material (Journal of Applied Polymer Science, 1981, Vol.26:3669-3688).This kind method weak point is that the weight fraction of expensive TMPTMA is up to 37%; the radiation crosslinking technological process will be carried out in nitrogen protection; will obtain the polyvinyl chloride cross-linked material of high gel content in addition, it is high that radiation temperature is wanted, and makes troubles to actually operating.Nineteen ninety H.P.Schreiber adopts the Co-60 source of radiation to study the PVC/TMPTMA system of interpolation chlorinatedpolyethylene (CPE), 100 parts of component PVC, 15 parts of CPE, 20 parts of DIDP (or TOTM35 part), 10 parts of TMPTMA, 7 parts of lead sulfate tribasics, 0.2 part in 1010 oxidation inhibitor are because the adding of CPE has improved cross-linking efficiency (Polymer Engineering and Science, June, 1990, Vol.30, No.16:981-987).Though this method has reduced the consumption of high price linking agent TMPTMA, but the raising of its cross-linking efficiency is to have absorbed a large amount of softening agent with saturated CPE, the softening agent that reduces effective plasticized PVC improves the cross-linking efficiency of PVC, the Co-60 source of radiation cycle is long in addition, efficient is low, cost is also high, is unfavorable for suitability for industrialized production.
Summary of the invention
The invention provides a kind of radiation crosslinking pvc material and preparation method thereof, in polyvinyl chloride, add paracril (perbutan), add linking agent again, softening agent, stablizer, lubricant, oxidation inhibitor and filler co-blended form polyvinyl chloride blend, adopt then rumbatron to blend in air, under the room temperature, carry out radiation with 1-12 megarad (Mrad) radiation dose, promptly get the radiation crosslinking pvc material.
The radiation crosslinking pvc material is made up of following component, and its content is weight part:
Polyvinyl chloride 20-100 part
Paracril 10-80 part
Linking agent 4-15 part
Softening agent 30-80 part
Stablizer 4-15 part
Lubricant 0.2-2.5 part
Oxidation inhibitor 0.1-1.5 part
Filler 6-50 part
The polyvinyl chloride (PVC) RESINS molecular weight is 3 * 10
4-2 * 10
5
In polyvinyl chloride, add the macromolecule modifier paracril, because paracril and polyvinyl chloride have good consistency, the performances such as tensile strength, wear resistance and temperature tolerance of pvc material have not only been improved, improve the degree of unsaturation of system simultaneously, helped improving the cross-linking efficiency of polyvinyl chloride.Acrylonitrile content in the paracril is 16-50%, and the molecular weight of paracril is 5 * 10
3-2 * 10
5
Linking agent is to be selected from trimethylolpropane trimethacrylate (molecular formula
The English TMPTMA that is called for short), the mixture of one or more in Viscoat 295 (TMPTA), triallyl isonitrile urea acid esters (TAIC), triallyl nitrile urea acid esters (TAC) or the tri (propylene glycol) diacrylate (TPGDA) etc.
Softening agent is trioctyl trimellitate (TOTM), Di Iso Decyl Phthalate (DIDP) or dimixo-octyl phthalate (DIOP) etc.
Stablizer is the two a mixture of lead sulfate tribasic or dibasic lead phosphite or they, or the one package stabilizer of calcium stearate/Zinic stearas etc.
Lubricant is oxidic polyethylene (OPE), stearic acid or sodium stearate etc.
Oxidation inhibitor is phosphorous acid esters such as phosphorous acid hexichol one monooctyl ester (ODP), diisooctyl phenyl phosphite (POOP) or sulfide-based as thiodipropionate dilauryl (DLTP), two octadecyl ester (DSTP) or four [3-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol esters (antioxidant 1010) of thio-2 acid etc.
Filler is a light active calcium carbonate, potter's clay or aluminium hydroxide etc.
The preparation method of radiation crosslinking pvc material of the present invention comprises the following steps:
1, mixing joins polyvinyl chloride, paracril, linking agent, stablizer, lubricant, softening agent, oxidation inhibitor and the filler proportioning by above-mentioned prescription in the mixing machine according to a conventional method, blend and about 10 minutes, when temperature reaches 60-80 ℃, reach the mixing terminal point, promptly get the polyvinyl chloride blend powder;
2, extrusion plasticizing and granulation plastify the blend powder and granulation in the extruding pelletization unit according to a conventional method, get the polyvinyl chloride blend pellet;
3, the product of material or definite shape is processed into the blend pellet earlier in processing and radiation on request, adopt rumbatron then under air at room temperature, carry out radiation with the 1-12Mrad radiation dose, get final product a kind of high performance radiation crosslinking pvc material or its product.
For the cross-linking efficiency to the radiation crosslinking pvc material detects, adopt the mensuration of gel content.
Gel content be after the blend radiation in the material polymkeric substance (polyvinyl chloride and paracril) participate in the percentage ratio that crosslinked part accounts for the polymkeric substance total amount.It is to measure like this: the material after 200～300 milligrams of blend radiation of clip, wrap with copper mesh.Successively carried device 48 hours in Soxhlet extractor with anhydrous diethyl ether and tetrahydrofuran (THF), vacuum-drying is to constant weight.Organic additive such as softening agent and have neither part nor lot in crosslinked superpolymer and extracted, and inorganic assistant agent such as filler is insoluble to tetrahydrofuran (THF) with crosslinked polymer gel and can not be by extracting.In insolubles, deduct inorganic assistant agent, calculate and participate in crosslinked superpolymer content Gc (gel content):
Gc＝(W
1-W
2)/W
0
In the formula: W
0Polymer weight in the sample before the-extracting; W
1Insolubles weight after the-extracting; W
2Inorganic assistant agent weight in the insolubles after the-extracting.
To carry out gel content determining referring to the radiation crosslinking pvc material test piece that embodiment 8 makes, research polyvinyl chloride and paracril different mixture than the time polyvinyl chloride blend radiation after the gel content of material with the variation of radiation dose, the results are shown in Table 1.
Table 1
Experimental result shows: the radiation crosslinking of polyvinyl chloride/nitrile-butadiene rubber blend has such rule, and gel content increases with radiation dose.Gel content increases comparatively fast during beginning, and the gel content increase is slowed down when irradiation dose surpasses 2Mrad.Gel content can only reach 85% when independent polyvinyl chloride was irradiated to 8Mrad, but with the paracril blend after, gel content can illustrate that the adding of paracril has improved the gel content of system near 100%.
The polyvinyl chloride of pure material or paracril are zero at the gel content of pre-irradiation, illustrate that they all do not take place crosslinked at pre-irradiation.But after their blend, gel formation is promptly arranged without irradiation.This initial gel may be chlorine atom in the polyvinyl chloride and the itrile group in the paracril or two key plasticate or the hot-pressed material process in, under the effect of trimethylolpropane trimethacrylate, crosslinking reaction having taken place, thereby has formed crosslinking structure.The polyvinyl chloride/nitrile-butadiene rubber blending ratio is 50/50 o'clock sample crosslinking degree maximum, and also explanation this moment is because chlorine atom in the polyvinyl chloride and the itrile group in the paracril or double bond content mate therefore initial crosslinking degree maximum.
To carry out gel content determining referring to the radiation crosslinking pvc material test piece that embodiment 9 makes, the gel content of material the results are shown in Table 2 with the variation of radiation dose after the polyvinyl chloride blend radiation that research forms with the change of different nitrile group content paracrils.
Table 2
Table 2 are polyvinyl chloride with 50/50 blend radiation of different nitrile group content paracrils after the gel content of material under different irradiation doses.Wherein, paracril 1 is that a kind of Russia produces paracril, and acrylonitrile content is 28～33%; Paracril 2 is the paracril 230S of Japan SYnthetic Rubber Co. Ltd, and acrylonitrile content is 31～35%; Paracril 3 is the paracril 220S of Japan SYnthetic Rubber Co. Ltd, and acrylonitrile content is 36～41%; Along paracril is Beijing Yanshan Petrochemical Company, can be considered as acrylonitrile content and be 0 paracril.
By table 2 as seen, the gel content of each test piece increases with the increase of irradiation dose.Gel content increases comparatively fast during beginning, and the gel content increase is slowed down when surpassing 2Mrad.Various polyvinyl chloride/nitrile-butadiene rubber blends all have initial gel formation at pre-irradiation.But along with nitrile group content in the paracril increases, initial gel content but reduces gradually.Polyvinyl chloride/nitrile-butadiene rubber 3 initial gel contents only are 10%, and the initial gel content of polyvinyl chloride/cis-1,4-polybutadiene rubber has reached 50%.This explanation may be that the unsaturated double-bond in the paracril has also participated in reaction in initial gel formation process.Simultaneously, polyvinyl chloride roughly is identical with the gel content of paracril 1, paracril 2, paracril 3 blends with the curve that irradiation dose increases, and finally can both reach 100% gel content.Although but the initial gel content of polyvinyl chloride/cis-1,4-polybutadiene rubber blend is higher, its gel content is little with the variation of irradiation dose, finally can only reach 83% gel content, and this is relatively poor relevant with the consistency of polyvinyl chloride with cis-1,4-polybutadiene rubber.
By the GB8815-88 method radiation crosslinking pvc material of the present invention is carried out the test of mechanical property below.To carry out tensile strength and elongation at break mensuration referring to the radiation crosslinking pvc material test piece that embodiment 10 makes, the tensile strength of material and elongation at break be with the variation of radiation dose after the polyvinyl chloride blend radiation of the paracril formation of research polyvinyl chloride and different nitrile group contents, the results are shown in Table 3 and table 4.
Table 3
Table 4
By table 3, table 4 as can be seen: polyvinyl chloride/nitrile-butadiene rubber blend radiation crosslinking back draft intensity improves, elongation at break descends, and generally speaking mechanical property improves.The mechanical property of radiation crosslinking pvc material of the present invention is more excellent more than the polyvinyl chloride radiation cross-linked material that does not add paracril.
Also radiation crosslinking pvc material of the present invention is carried out hardness in addition and reach the mensuration of carrying out thermal distortion by the GB8815-88 method by the GB2411-80 method.Measured value display material hardness can reach shore hardness 85-96A, and the high expression of material hardness value material has good abrasion resistance; 120 ℃ of thermal distortions only is 7.2-22.1%, and thermal distortion is low to show that material also has good heat resistance.
Radiation crosslinking pvc material of the present invention can be made into various flexible cord cables, rigid line cable and sheet material, for example in the application of aspects such as electric wire for building, automobile electrical line, light-duty special cord cable, deep-well diving cable.As mentioned above, the polyvinyl chloride blend pellet is processed into the product with definite shape on request earlier, for example electric wire, cable, sheet material etc., adopt the rumbatron source of radiation under air at room temperature, to carry out radiation then, get final product to such an extent that have electric wire, cable, sheet material of high performance radiation crosslinking pvc material etc. with the 1-12Mrad radiation dose.
Advantage of the present invention: added the macromolecule modifier paracril in the radiation crosslinking pvc material of the present invention, because paracril and polyvinyl chloride have good consistency, therefore not only the performance of this material has greatly improved, improve the degree of unsaturation of system simultaneously, helped improving the cross-linking efficiency of polyvinyl chloride.Embodiment shows, gel content can reach 84-95%, and tensile strength of material is 24.3-34.5Mpa, and the material shore hardness is 85-96A, thermal distortion is 7.2-22.1%, shows that radiation crosslinking pvc material of the present invention has good mechanical performance, wear resistance and thermotolerance.The adding of macromolecule modifier paracril has significantly reduced expensive dosage of crosslinking agent, has reduced cost.The present invention adopts rumbatron at room temperature, in the air atmosphere, carry out the radiation crosslinking pvc material that radiation just can obtain high gel content under the low radiation dose, the efficient height, and cost is low, and actually operating is also convenient, helps suitability for industrialized production.
Embodiment
Component among following each embodiment is a weight part.
Embodiment 1
With polyvinyl chloride (PVC) RESINS (molecular weight 8.1 * 10
4) 75 parts, 8 parts of linking agent TMPTMA, (acrylonitrile content is 32% to paracril, molecular weight 1 * 10
4) 25 parts, 40 parts of softening agent TOTM, each 4 parts of stablizer lead sulfate tribasic and dibasic lead phosphites, 0.8 part of lubricant OPE, 8 parts of filler light active calcium carbonates, 0.2 part of oxidation inhibitor diisooctyl phenyl phosphite mixed about 10 minutes in mixing machine, when temperature reaches 60-80 ℃, reach the mixing terminal point, promptly get the blend powder.In two steps type double-screw extruding pelletizing unit, plastify granulation again, get the blend pellet.Pellet is made into electric wire for building again, at room temperature carries out radiation in the air, the radiation dose of rumbatron is controlled 5Mrad, promptly gets the electric wire for building of radiation crosslinking pvc material.The performance test results: gel content 92%, tensile strength 34.0Mpa, elongation at break 125%, material shore hardness 95A is 120 ℃ of thermal distortions 8.8%.
Embodiment 2
With polyvinyl chloride (PVC) RESINS (molecular weight 1.56 * 10
5) 50 parts, 15 parts of linking agent TPGDA, (acrylonitrile content is 41% to paracril, molecular weight 5 * 10
3) 50 parts, 40 parts of plasticizer DIDPs, 6 parts of 6 parts of stablizer lead sulfate tribasics and dibasic lead phosphites, 0.4 part of lubricant OPE, 8 parts in potter's clay, 0.1 part of oxidation inhibitor diisooctyl phenyl phosphite.Method with embodiment 1 makes the blend pellet.Again that pellet is first through melt extruding equipment, it is coated on the core insulation layer as restrictive coating through the cable mould again, at room temperature, carry out radiation in the air, the radiation dose control 6Mrad of rumbatron promptly gets the cable with radiation crosslinking pvc material restrictive coating.The performance test results: gel content 94%, tensile strength 31.2Mpa, elongation at break 110%, material shore hardness 92A.120 ℃ of thermal distortions 12.1%.
Embodiment 3
With polyvinyl chloride (PVC) RESINS (molecular weight 5 * 10
4) 100 parts, 10 parts of linking agent TMPTMA, (acrylonitrile content is 32% to paracril, molecular weight 2 * 10
5) 80 parts, 30 parts of softening agent TOTM, 6 parts of 6 parts of stablizer lead sulfate tribasics and dibasic lead phosphites, 0.4 part of lubricant OPE, 8 parts of filler light active calcium carbonates, 0.1 part of antioxidant 1010.Method with embodiment 1 makes the blend pellet.Again that pellet is first through melt extruding equipment, through the cable mould it is coated on the core as insulation layer again, coat again as restrictive coating on the online again core insulation layer, at room temperature, carry out radiation in the air, the radiation dose control 5Mrad of rumbatron promptly gets the cable with radiation crosslinking pvc material insulation layer and restrictive coating.The performance test results: gel content 84%, tensile strength 24.3Mpa, elongation at break 175%, material shore hardness 85A.120 ℃ of thermal distortions 22.1%.
Embodiment 4
Polyvinyl chloride (PVC) RESINS (molecular weight 8.1 * 10
4) 75 parts, 10 parts of linking agent TMPTA, (acrylonitrile content is 32% to paracril, molecular weight 1 * 10
4) 25 parts, 40 parts of softening agent TOTM, 8 parts of stablizer lead sulfate tribasics, 2.0 parts of lubricant sodium stearates, 20 parts of filler light active calcium carbonates, 1.3 parts of oxidation inhibitor phosphorous acid hexichol one monooctyl esters.Method with embodiment 1 makes the blend pellet.Again pellet is made into sheet material, at room temperature, carry out radiation in the air, the radiation dose control 8Mrad of rumbatron promptly gets the sheet material of radiation crosslinking pvc material.The performance test results: gel content 94%, tensile strength 34.5Mpa, elongation at break 128%, material shore hardness 96A.120 ℃ of thermal distortions 7.2%.
Embodiment 5
Polyvinyl chloride (PVC) RESINS (molecular weight 1.56 * 10
5) 100 parts, 10 parts of linking agent TMPTMA, (acrylonitrile content is 28% to paracril, molecular weight 1 * 10
5) 10 parts, 80 parts of softening agent TOTM, 15 parts of the one package stabilizers of calcium stearate/Zinic stearas, 0.4 part of lubricant OPE, 40 parts in hydroxide filler aluminum oxide, 0.4 part of oxidation inhibitor diisooctyl phenyl phosphite.Method with embodiment 1 makes electric wire for building.At room temperature, carry out radiation in the air, the radiation dose control 12Mrad of rumbatron promptly gets the electric wire for building of radiation crosslinking pvc material.The performance test results: gel content 90%, tensile strength 34.5Mpa, elongation at break 121%, material shore hardness 95A.120 ℃ of thermal distortions 14.5%.
Embodiment 6
Polyvinyl chloride (PVC) RESINS (molecular weight 8.1 * 10
4) 75 parts, 4 parts of linking agent TAIC, (acrylonitrile content is 32%, 1 * 10 to paracril
4) 25 parts, 40 parts of softening agent DIOP, 12 parts of the one package stabilizers of calcium stearate/Zinic stearas, 0.4 part of lubricant OPE, 8 parts of filler light active calcium carbonates, 1.5 parts of oxidation inhibitor thiodipropionate dilauryls.Method with embodiment 1 makes the blend pellet.Pellet is made into the automobile electrical line, at room temperature, carry out radiation in the air, the radiation dose control 3Mrad of rumbatron promptly gets the automobile electrical line of radiation crosslinking pvc material again.The performance test results: gel content 84%, tensile strength 28.5Mpa, elongation at break 163%, material shore hardness 92A.120 ℃ of thermal distortions 15.1%.
Embodiment 7
Polyvinyl chloride (PVC) RESINS (molecular weight 8.1 * 10
4) 75 parts, 5 parts of linking agent TMPTMA and TAIC5 part, (acrylonitrile content is 32%, 1.5 * 10 to paracril
5) 25 parts, 40 parts of softening agent TOTM, 12 parts of the one package stabilizers of calcium stearate/Zinic stearas, 0.4 part of lubricant OPE, 8 parts in filler potter's clay, 1.0 parts of oxidation inhibitor thiodipropionate dilauryls.Method with embodiment 1 makes the blend pellet.Method with embodiment 2 is made into the restrictive coating that is coated on the core insulation layer with pellet again, and at room temperature, carry out radiation in the air, the radiation dose control 5Mrad of rumbatron promptly gets the cable with radiation crosslinking pvc material restrictive coating.The performance test results: gel content 95%, tensile strength 34.5Mpa, elongation at break 110%, material shore hardness 90A.120 ℃ of thermal distortions 11.3%.
Embodiment 8
With polyvinyl chloride (PVC) RESINS (molecular weight 8.1 * 10
4) and paracril 230S carry out blend in the ratio of table 1, respectively add simultaneously 10 parts of trimethylolpropane trimethacrylate linking agents, 40 parts of trioctyl trimellitates (TOTM) softening agent, the stablizer of 6 parts of lead sulfate tribasics and 6 parts of disalt family estate lead phosphates, 0.4 part oxidic polyethylene (OPE) lubricant, 0.1 part diisooctyl phenyl phosphite oxidation inhibitor, 8 parts of light active calcium carbonate fillers mixed in mixing machine about 10 minutes, when temperature reaches 60-80 ℃, reach the mixing terminal point, promptly get the blend powder.In two steps type double-screw extruding pelletizing unit, plastify granulation again, get the blend pellet.In mill, pellet was plastified 5 minutes again, 160 ℃ of test pieces that get thickness 2mm of roller temperature, with test piece mold pressing 5 minutes, 165 ℃ of molding temperatures, the strong 30Mpa of mold pressing.With the blend test piece at room temperature, carry out radiation in the air, the radiation dose control 0～8Mrad of rumbatron.Then gel content determining is carried out in the irradiation cross-linked polyvinyl chloride material test piece that makes, research polyvinyl chloride and paracril different mixture than the time polyvinyl chloride blend radiation after the gel content of material with the variation of radiation dose, the results are shown in Table 1.
Embodiment 9
With polyvinyl chloride (PVC) RESINS (molecular weight 8.1 * 10
4) 50 parts, the paracril of different nitrile group contents carries out blend for 50 parts in 10 parts of trimethylolpropane trimethacrylate linking agents and the table 2, add 40 parts of trioctyl trimellitates (TOTM) softening agent simultaneously, 6 parts of lead sulfate tribasics and 6 parts of dibasic lead phosphite stablizers, 0.4 part oxidic polyethylene (OPE) lubricant, 0.2 part phosphorous acid hexichol one monooctyl ester (ODP) oxidation inhibitor, 8 parts of light active calcium carbonate fillers, method with embodiment 8 makes the test piece of irradiation cross-linked polyvinyl chloride material, gel content determining is carried out in test piece, the gel content of material the results are shown in Table 2 with the variation of radiation dose after the polyvinyl chloride blend radiation that research forms with the change of different nitrile group content paracrils.
Embodiment 10
With polyvinyl chloride (PVC) RESINS (molecular weight 8.1 * 10
4) 50 parts, the paracril of different nitrile group contents carries out blend for 50 parts in 10 parts of trimethylolpropane trimethacrylate linking agents and the table 2, add 40 parts of trioctyl trimellitates (TOTM) softening agent simultaneously, 6 parts of lead sulfate tribasics and 6 parts of dibasic lead phosphite stablizers, 0.4 part oxidic polyethylene (OPE) lubricant, 0.2 part phosphorous acid hexichol one monooctyl ester (ODP) oxidation inhibitor, 8 parts of light active calcium carbonate fillers, method with embodiment 8 makes the test piece of irradiation cross-linked polyvinyl chloride material, tensile strength and elongation at break mensuration are carried out in test piece, the tensile strength of material and extension at break be with the variation of radiation dose after the polyvinyl chloride blend radiation of research polyvinyl chloride and the formation of different nitrile group content paracrils, the results are shown in Table 3 and table 4.
Claims (11)
1, a kind of radiation crosslinking pvc material is characterized in that it is made up of following component, and its content is weight part
Polyvinyl chloride 20-100 part
Paracril 10-80 part
Linking agent 4-15 part
Softening agent 30-80 part
Stablizer 4-15 part
Lubricant 0.2-2.5 part
Oxidation inhibitor 0.1-1.5 part
Filler 6-50 part
2, radiation crosslinking pvc material as claimed in claim 1, the molecular weight that it is characterized in that described polyvinyl chloride is 3 * 10
4-2 * 10
5
3, radiation crosslinking pvc material as claimed in claim 1 is characterized in that the acrylonitrile content in the described paracril is 16-50%, and the molecular weight of paracril is 5 * 10
3-2 * 10
5
4, radiation crosslinking pvc material as claimed in claim 1 is characterized in that described linking agent is one or more the mixture that is selected from trimethylolpropane trimethacrylate, Viscoat 295, triallyl isonitrile urea acid esters, triallyl nitrile urea acid esters or the tri (propylene glycol) diacrylate.
5, radiation crosslinking pvc material as claimed in claim 1 is characterized in that described softening agent is trioctyl trimellitate, Di Iso Decyl Phthalate or dimixo-octyl phthalate.
6, radiation crosslinking pvc material as claimed in claim 1 is characterized in that described stablizer is the two a mixture of lead sulfate tribasic, dibasic lead phosphite or they, or the one package stabilizer of calcium stearate/Zinic stearas.
7, radiation crosslinking pvc material as claimed in claim 1 is characterized in that described lubricant is oxidic polyethylene, stearic acid or sodium stearate.
8, radiation crosslinking pvc material as claimed in claim 1, it is characterized in that described oxidation inhibitor is phosphorous acid hexichol one monooctyl ester, diisooctyl phenyl phosphite, thiodipropionate dilauryl, two octadecyl ester or four [3-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol esters of thio-2 acid.
9, radiation crosslinking pvc material as claimed in claim 1 is characterized in that described filler is light active calcium carbonate, potter's clay or aluminium hydroxide.
10, the preparation method of the described radiation crosslinking pvc material of claim 1, it is characterized in that adopting rumbatron is source of radiation.
11, as the preparation method of radiation crosslinking pvc material as described in the claim 10, it is characterized in that rumbatron carries out radiation in air, under the room temperature, radiation dose is 1～12Mrad.
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2002
- 2002-11-12 CN CN 02145262 patent/CN1220728C/en not_active Expired - Lifetime
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