CN117777617A - Anti-aging PVC cable and preparation process thereof - Google Patents
Anti-aging PVC cable and preparation process thereof Download PDFInfo
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- CN117777617A CN117777617A CN202311806245.9A CN202311806245A CN117777617A CN 117777617 A CN117777617 A CN 117777617A CN 202311806245 A CN202311806245 A CN 202311806245A CN 117777617 A CN117777617 A CN 117777617A
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- 239000006096 absorbing agent Substances 0.000 claims 1
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 abstract description 30
- 125000002811 oleoyl group Chemical group O=C([*])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])/C([H])=C([H])\C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 abstract description 16
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- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to an anti-aging PVC cable and a preparation process thereof, and belongs to the technical field of cable preparation, wherein the PVC cable comprises the following raw materials: PVC resin, ultraviolet absorber, hindered amine stabilizer, antioxidant, plasticizer, methyl tin mercaptide, magnesium stearate, stearic acid and paraffin. According to the invention, three substances of UV-1164, chimassorb944 and ammonium hexametaphosphate are used for absorbing ultraviolet rays, capturing free radicals and decomposing hydroperoxide in a multi-dimensional combined way, so that the prepared PVC cable has excellent ageing resistance; in addition, the invention also adds adipic acid di (monoacetyl, monoepoxy oleoyl) glyceride, methyl tin mercaptide and magnesium stearate, which increases the flexibility of the PVC resin, and also effectively reduces the glass transition temperature of the PVC resin, thereby leading the PVC cable to have better flexibility.
Description
Technical Field
The invention belongs to the technical field of cable preparation, and particularly relates to an anti-aging PVC cable and a preparation process thereof.
Background
With the wide application of electrical equipment and the increasing demand for power, the performance requirements for cables are also increasing. PVC (polyvinyl chloride) cables have been one of the main choices of raw materials in the cable field due to their lower manufacturing cost. However, as the service time increases, PVC cables are subject to aging, hardening, embrittlement, etc., and the aging of PVC cables is mainly caused by external environmental factors such as ultraviolet rays, temperature changes, oxygen, etc., and ultraviolet rays are one of the main aging factors, and the irradiation thereof causes oxidation reaction of the surface of PVC cables, so that they are gradually aged. Whether the ageing or the reduced flexibility of the PVC cable is the reason for gradual hardening, the long-term stable operation of the PVC cable is easy to limit. Therefore, in order to solve these problems, it is necessary to provide a new PVC cable material having good aging resistance and flexibility, so as to be expected to provide a more reliable and durable material for use in the fields of power transmission, electrical connection, and the like.
Disclosure of Invention
The invention aims to provide an anti-aging PVC cable and a preparation process thereof, wherein three substances of UV-1164, chimassorb944 and ammonium hexametaphosphate are used for absorbing ultraviolet rays, capturing free radicals and decomposing hydroperoxide to form a multi-dimensional combined action, so that the prepared PVC cable has excellent anti-aging performance as a whole; in addition, the invention adds adipic acid di (monoacetyl, monoepoxy oleoyl) glyceride to increase the free volume of the system polymer, thereby increasing the flexibility of the PVC resin, on the basis, methyl tin mercaptide and magnesium stearate are matched with adipic acid di (monoacetyl, monoepoxy oleoyl) glyceride, thereby effectively reducing the glass transition temperature of the PVC resin, leading the PVC resin to be easier to plasticize, further strengthening the flexibility of the final PVC cable finished product, and solving the problem of poor ageing resistance and flexibility of the PVC cable in the prior art.
The aim of the invention can be achieved by the following technical scheme:
an anti-aging PVC cable comprises the following raw materials in parts by weight:
as a preferred technical solution of the present invention, the PVC cable further comprises stearic acid and paraffin wax.
As a preferable embodiment of the present invention, the stearic acid is 0.5 to 0.7 parts by weight.
As a preferable embodiment of the present invention, the paraffin wax is 1.5-2 parts by weight.
As a preferred embodiment of the present invention, the ultraviolet absorber is UV-1164. The ultraviolet absorbent is 2- (4, 6-bis (2, 4-dimethylphenyl) -1,3, 5-triazin-2-yl) -5-octyloxyphenol with a Chinese name of UV-1164; as a pale yellow powder. The added UV-1164 can effectively absorb most of ultraviolet energy so as to reduce the radiation intensity of ultraviolet rays on PVC materials and slow down the chain initiation reaction speed of material photo-aging.
As a preferred embodiment of the present invention, the hindered amine stabilizer is Chimassorb 944.Chimassorb 944 has the chemical name poly { [6- [ (1, 3-tetramethylbutyl) amino ] -1,3, 5-triazine-2, 4- [ (2, 6) -tetramethyl-piperidinyl) imino ] -1, 6-hexamethylenediyl [ (2, 6-tetramethyl-4-piperidinyl) imino ] }; the Chimassorb944 added in the invention can timely capture free radicals generated in the system to block the free radicals from attacking the PVC molecular chain, thereby reducing photodegradation reaction caused by ultraviolet rays to the greatest extent.
As a preferred technical scheme of the invention, the antioxidant is tris (2, 4-di-tert-butyl) phosphite. The added tri (2, 4-di-tert-butyl) phosphite ester can effectively decompose the hydroperoxide in the system and terminate the polymer free radical autoxidation reaction participated by the hydroperoxide.
Through repeated screening and sample selection by the inventor, three substances, namely UV-1164, hindered amine stabilizer Chimassorb944 and antioxidant tri (2, 4-di-tert-butyl) phosphite, are finally selected to react with PVC resin, so that the PVC cable has excellent ageing resistance.
As a preferred embodiment of the present invention, the plasticizer is adipic acid di (monoacetyl, monoepoxyoleoyl) glyceride.
The adipic acid di (monoacetyl, monoepoxy oleoyl) glyceride is a functional environment-friendly plasticizer synthesized by taking vegetable oil as a raw material and sequentially carrying out the steps of transesterification, high-temperature esterification, acetylation, epoxidation and the like, and has good compatibility with PVC resin, precipitation resistance, migration resistance, aging resistance, heat resistance, solvent extraction resistance and oil resistance.
A method for preparing an anti-aging PVC cable, the method comprising the steps of:
s1, mixing PVC resin and a plasticizer at a controlled temperature, and then sequentially adding an antioxidant, a hindered amine stabilizer, an ultraviolet absorber, methyl tin mercaptide, magnesium stearate, stearic acid and paraffin wax for banburying at a controlled temperature to obtain a mixture;
s2, putting the mixture into a double-screw extruder for extrusion granulation, and then melting, extruding and coating the obtained granules on the periphery of the conductive cable core, and cooling and solidifying to obtain the PVC cable.
As a preferable technical scheme of the invention, the temperature of the temperature-controlled mixing in the step S1 is 85-95 ℃ and the time is 10-15min; the temperature of the temperature-controlled banburying is 160-170 ℃ and the time is 5-6min.
The invention has the beneficial effects that:
(1) The ultraviolet absorber UV-1164 is added, most of ultraviolet energy can be effectively absorbed, so that the radiation intensity of ultraviolet to the PVC material is reduced, the photo-aging chain initiation reaction speed of the material is slowed down, meanwhile, the unabsorbed complete ultraviolet energy can induce PVC to generate free radicals, at the moment, the hindered amine stabilizer Chimassorb944 added in the system can timely capture the generated free radicals to block the generated free radicals from attacking the PVC molecular chain, and the photo-degradation reaction caused by the ultraviolet is furthest lightened; in addition, the invention also adds the hydroperoxide in the tri (2, 4-di-tert-butyl) phosphite decomposition system to stop the polymer free radical autoxidation reaction participated by the hydroperoxide. The three substances added in the invention can absorb ultraviolet rays, capture free radicals and decompose hydroperoxide through the multi-dimensional combined action, so that the prepared PVC cable has excellent ageing resistance.
(2) According to the invention, adipic acid di (monoacetyl, monoepoxy oleoyl) glyceride is selected from a plurality of plasticizers, and is innovatively added into the mixture preparation of raw materials such as PVC resin, and the polar groups in the added adipic acid di (monoacetyl, monoepoxy oleoyl) glyceride and the polar groups of the PVC resin are mutually attracted, so that the acting force between the original molecular chain segments is weakened, and simultaneously the adipic acid di (monoacetyl, monoepoxy oleoyl) glyceride is added into the PVC molecular chain and inserted into the PVC molecular chain, so that the free volume of a system polymer is increased, the PVC molecular chain is easier to move, and further, the PVC resin is increased in flexibility; on the basis, the methyl tin mercaptide and the magnesium stearate are used as auxiliary materials, so that the glass transition temperature of the PVC resin is effectively reduced, the PVC cable has better flexibility and is easier to plasticize, and the flexibility of a final finished product is further enhanced.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The adipic acid di (monoacetyl, monoepoxy oleoyl) glyceride used in the invention is purchased from Nantong sea-lug-Mars technologies Co., ltd; the hindered amine stabilizer Chimassorb944 used was purchased from Dinghai plastics chemical engineering Co., ltd; the details are not described in detail later.
Example 1
An anti-aging PVC cable comprises the following raw materials in parts by weight:
a method for preparing an anti-aging PVC cable, the method comprising the steps of:
s1, mixing PVC resin and adipic acid di (monoacetyl, monoepoxy oleoyl) glyceride at a temperature of 95 ℃ for 10min, and then sequentially adding tri (2, 4-di-tert-butyl) phosphite ester, chimassorb944, UV-1164, methyl tin mercaptide, magnesium stearate, stearic acid and paraffin wax, and banburying at a temperature of 160 ℃ for 5min to obtain a mixture;
s2, putting the mixture into a double-screw extruder for extrusion granulation, and then melting, extruding and coating the obtained granules on the periphery of the conductive cable core, and cooling and solidifying to obtain the PVC cable.
Example 2
An anti-aging PVC cable comprises the following raw materials in parts by weight:
a method for preparing an anti-aging PVC cable, the method comprising the steps of:
s1, mixing PVC resin and adipic acid di (monoacetyl, monoepoxy oleoyl) glyceride at a temperature of 90 ℃ for 15min, and then sequentially adding tri (2, 4-di-tert-butyl) phosphite ester, chimassorb944, UV-1164, methyl tin mercaptide, magnesium stearate, stearic acid and paraffin wax, and banburying at a temperature of 170 ℃ for 5.5min to obtain a mixture;
s2, putting the mixture into a double-screw extruder for extrusion granulation, and then melting, extruding and coating the obtained granules on the periphery of the conductive cable core, and cooling and solidifying to obtain the PVC cable.
Example 3
An anti-aging PVC cable comprises the following raw materials in parts by weight:
a method for preparing an anti-aging PVC cable, the method comprising the steps of:
s1, mixing PVC resin and adipic acid di (monoacetyl, monoepoxy oleoyl) glyceride at a temperature of 85 ℃ for 13min, and then sequentially adding tri (2, 4-di-tert-butyl) phosphite ester, chimassorb944, UV-1164, methyl tin mercaptide, magnesium stearate, stearic acid and paraffin wax, and banburying at a temperature of 165 ℃ for 6min to obtain a mixture;
s2, putting the mixture into a double-screw extruder for extrusion granulation, and then melting, extruding and coating the obtained granules on the periphery of the conductive cable core, and cooling and solidifying to obtain the PVC cable.
Comparative examples 1 to 3
The difference compared to example 2 is that the parts by weight of UV-1164, chimassorb944 and ammonium hexametaphosphate in comparative examples 1-3 are shown in Table 1, with the remaining operating steps and parameters unchanged.
TABLE 1
Test example 1
The PVC cables prepared in examples 1 to 3 and comparative examples 1 to 3 were used as samples for photo aging performance test. The method is characterized in that an artificial ultraviolet lamp accelerated aging test method is adopted, a PVC cable is placed in an optical aging box, ultraviolet carbon arc light with the same intensity is used for irradiation, sampling is carried out at fixed time, and the initial embrittlement of the PVC cable is used as an aging termination evaluation index. The test temperature was 50℃and the tensile strength of the sample was measured at 0h, and the sample was taken out at 2h intervals thereafter and then measured, and the results are shown in Table 2.
TABLE 2
As can be seen from Table 2, the PVC cable prepared by the method has excellent ageing resistance. The PVC cable prepared by the method has excellent ageing resistance by the combination of three substances of UV-1164, chimassorb944 and ammonium hexametaphosphate from the multi-dimension of absorbing ultraviolet rays, capturing free radicals and decomposing hydroperoxide.
Comparative example 4
In comparison with example 2, the difference is that no di (monoacetyl, monoepoxyoleoyl) glyceride of adipic acid was added in comparative example 4, as follows:
an anti-aging PVC cable comprises the following raw materials in parts by weight:
a method for preparing an anti-aging PVC cable, the method comprising the steps of:
s1, sequentially adding tris (2, 4-di-tert-butyl) phosphite ester, chimassorb944, UV-1164, methyl tin mercaptide, magnesium stearate, stearic acid and paraffin into PVC resin, and banburying at 170 ℃ for 5.5min to obtain a mixture;
s2, putting the mixture into a double-screw extruder for extrusion granulation, and then melting, extruding and coating the obtained granules on the periphery of the conductive cable core, and cooling and solidifying to obtain the PVC cable.
Comparative example 5
In comparison with example 2, the difference is that no methyl tin mercaptide is added in comparative example 5, specifically as follows:
an anti-aging PVC cable comprises the following raw materials in parts by weight:
a method for preparing an anti-aging PVC cable, the method comprising the steps of:
s1, mixing PVC resin and adipic acid di (monoacetyl, monoepoxy oleoyl) glyceride at a temperature of 90 ℃ for 15min, and then sequentially adding tri (2, 4-di-tert-butyl) phosphite ester, chimassorb944, UV-1164, magnesium stearate, stearic acid and paraffin wax, and banburying at a temperature of 170 ℃ for 5.5min to obtain a mixture;
s2, putting the mixture into a double-screw extruder for extrusion granulation, and then melting, extruding and coating the obtained granules on the periphery of the conductive cable core, and cooling and solidifying to obtain the PVC cable.
Comparative example 6
In comparison with example 2, the difference is that magnesium stearate is not added in comparative example 6, specifically as follows:
an anti-aging PVC cable comprises the following raw materials in parts by weight:
a method for preparing an anti-aging PVC cable, the method comprising the steps of:
s1, mixing PVC resin and adipic acid di (monoacetyl, monoepoxy oleoyl) glyceride at a temperature of 90 ℃ for 15min, and then sequentially adding tri (2, 4-di-tert-butyl) phosphite, chimassorb944, UV-1164, methyl tin mercaptide, stearic acid and paraffin wax, and banburying at a temperature of 170 ℃ for 5.5min to obtain a mixture;
s2, putting the mixture into a double-screw extruder for extrusion granulation, and then melting, extruding and coating the obtained granules on the periphery of the conductive cable core, and cooling and solidifying to obtain the PVC cable.
Test example 2
The mixtures obtained in step S1 of examples 1 to 3 and comparative examples 4 to 6 were plasticized into sheets in a two-roll mill, wherein the front roll temperature was 170℃and the rear roll temperature was 155℃and the roll speed ratio was 1:1.1, sheets having a thickness of 1mm were obtained, standard bars were cut into standard bars as test pieces by a standard bar cutter, and these test pieces were subjected to a Shore A hardness test according to standard GB/T2411-2008 to reflect the softness of the finished products, wherein the test time was 1min, each test piece was measured 3 times, the average value thereof was taken, and the test results are shown in Table 3.
TABLE 3 Table 3
| Hardness of Shore A | |
| Example 1 | 43 |
| Example 2 | 41 |
| Example 3 | 42 |
| Comparative example 4 | 59 |
| Comparative example 5 | 53 |
| Comparative example 6 | 50 |
As can be reflected from Table 3, the PVC cable prepared according to the invention has excellent flexibility. In detail, it can be seen from comparative examples 4 to 6 that the addition of di (monoacetyl, monoepoxy oleoyl) adipate has the greatest effect on the flexibility of the final product because the polar groups in the di (monoacetyl, monoepoxy oleoyl) adipate can be attracted to the polar groups of the PVC resin to weaken the forces between the original molecular segments, while the di (monoacetyl, monoepoxy oleoyl) adipate is added to and inserted into the PVC molecular chains to increase the free volume of the system polymer to make the PVC molecular chains more easily move, further, to make the PVC resin exhibit increased flexibility. And methyl tin mercaptide or magnesium stearate is not added, the glass transition temperature of the PVC resin is not well reduced, namely, the PVC resin is not easy to plasticize.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely illustrative and explanatory of the invention, as various modifications and additions may be made to the particular embodiments described, or in a similar manner, by those skilled in the art, without departing from the scope of the invention or exceeding the scope of the invention as defined in the claims.
Claims (10)
1. An anti-aging PVC cable is characterized by comprising the following raw materials in parts by weight:
2. the anti-aging PVC cable according to claim 1, wherein the PVC cable further comprises stearic acid and paraffin wax.
3. The anti-aging PVC cable according to claim 2, wherein the stearic acid is 0.5 to 0.7 parts by weight.
4. The anti-aging PVC cable according to claim 2, wherein the paraffin wax is 1.5-2 parts by weight.
5. The anti-aging PVC cable according to claim 1, wherein the UV absorber is UV-1164.
6. The anti-aging PVC cable according to claim 1, wherein the hindered amine stabilizer is Chimassorb 944.
7. The anti-aging PVC cable according to claim 1, wherein the antioxidant is tris (2, 4-di-t-butyl) phosphite.
8. The anti-aging PVC cable according to claim 1, wherein the plasticizer is di (monoacetyl, monoepoxyoleoyl) adipate.
9. A method of producing an anti-aging PVC cable according to any of the claims 2 to 4, comprising the steps of:
s1, mixing PVC resin and a plasticizer at a controlled temperature, and then sequentially adding an antioxidant, a hindered amine stabilizer, an ultraviolet absorber, methyl tin mercaptide, magnesium stearate, stearic acid and paraffin wax for banburying at a controlled temperature to obtain a mixture;
s2, putting the mixture into a double-screw extruder for extrusion granulation, and then melting, extruding and coating the obtained granules on the periphery of the conductive cable core, and cooling and solidifying to obtain the PVC cable.
10. The method for preparing an anti-aging PVC cable according to claim 9, wherein the temperature of the temperature-controlled mixing in the step S1 is 85-95 ℃ for 10-15min; the temperature of the temperature-controlled banburying is 160-170 ℃ and the time is 5-6min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311806245.9A CN117777617A (en) | 2023-12-26 | 2023-12-26 | Anti-aging PVC cable and preparation process thereof |
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| CN202311806245.9A CN117777617A (en) | 2023-12-26 | 2023-12-26 | Anti-aging PVC cable and preparation process thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112480573A (en) * | 2020-12-11 | 2021-03-12 | 深圳市帝源新材料科技股份有限公司 | Modified polyvinyl chloride cable material, preparation method thereof and cable |
| CN116199988A (en) * | 2023-03-27 | 2023-06-02 | 厦门恒美达科技有限公司 | Anti-aging modified plastic and preparation method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112480573A (en) * | 2020-12-11 | 2021-03-12 | 深圳市帝源新材料科技股份有限公司 | Modified polyvinyl chloride cable material, preparation method thereof and cable |
| CN116199988A (en) * | 2023-03-27 | 2023-06-02 | 厦门恒美达科技有限公司 | Anti-aging modified plastic and preparation method thereof |
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| Title |
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| 杨明山，王珏: "塑料改性实用技术与应用", 30 June 2014, 印刷工业出版社, pages: 233 * |
| 王兴为: "塑料助剂与配方设计技术", 31 December 2016, 化学工业出版社, pages: 231 * |
| 隋昭德，李杰，张玉杰: "光稳定剂及其应用技术", 31 January 2010, 中国轻工业出版社, pages: 214 * |
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