Search

CN-122011627-A - Lead-arsenic-free polyvinyl chloride sheath cable material and preparation method thereof

CN122011627ACN 122011627 ACN122011627 ACN 122011627ACN-122011627-A

Abstract

The invention relates to the technical field of polyvinyl chloride materials, and discloses a lead-arsenic-free polyvinyl chloride sheath cable material and a preparation method thereof. The polyvinyl chloride sheath cable material comprises, by weight, 100 parts of polyvinyl chloride resin powder, 40-45 parts of a plasticizer, 5-7 parts of a stabilizer, 10-15 parts of calcium carbonate, 10-15 parts of aluminum hydroxide, 2-4 parts of magnesium hydroxide, 0.5-2 parts of an anti-dripping agent and 0.2-1 part of a synergist, wherein the stabilizer is folic acid modified Ca-Mg-Al-LDH. The plasticizer consists of dioctyl terephthalate and stearoyl chloride modified red phosphorus microcapsules. The prepared polyvinyl chloride sheath cable material has good flame retardance and thermal aging resistance.

Inventors

  • WANG BING
  • LI LIANXI
  • MA XIAORUI
  • ZHU LICHAO
  • CUI XINYU
  • ZHANG ZHAOBING

Assignees

  • 天津六0九电缆有限公司

Dates

Publication Date
20260512
Application Date
20260324

Claims (8)

  1. 1. The lead-arsenic-free polyvinyl chloride sheath cable material is characterized by comprising, by weight, 100 parts of polyvinyl chloride resin powder, 40-45 parts of a plasticizer, 5-7 parts of a stabilizer, 10-15 parts of calcium carbonate, 10-15 parts of aluminum hydroxide, 2-4 parts of magnesium hydroxide, 0.5-2 parts of an anti-dripping agent and 0.2-1 part of a synergist; the stabilizer is folic acid modified Ca-Mg-Al-LDH.
  2. 2. The lead-arsenic-free polyvinyl chloride sheath cable material as set forth in claim 1, wherein the folic acid modified Ca-Mg-Al-LDH preparation method comprises the following steps: (1) Adding calcium nitrate, magnesium nitrate and aluminum nitrate into water, stirring and dissolving to obtain a salt solution, adopting a double-drop coprecipitation method, simultaneously dropwise adding cyanuric acid aqueous solution and alkaline solution, controlling pH to be 9-10, stirring for 6-8 hours, performing hydrothermal reaction at 160-170 ℃ for 10-12 hours, washing and drying to obtain Ca-Mg-Al-LDH; (2) Respectively dispersing folic acid and Ca-Mg-Al-LDH in water, then mixing, ultrasonically dispersing for 30-60 minutes, centrifuging and drying to obtain the folic acid modified Ca-Mg-Al-LDH.
  3. 3. The lead-arsenic-free polyvinyl chloride sheath cable material as claimed in claim 2, wherein the raw materials of the Ca-Mg-Al-LDH comprise 0.6-0.7 part of calcium nitrate, 6-7 parts of magnesium nitrate, 2-3 parts of aluminum nitrate and 3-4 parts of cyanuric acid; in the folic acid modified Ca-Mg-Al-LDH raw material, the mass ratio of folic acid to Ca-Mg-Al-LDH is 1-2:5.
  4. 4. The lead-arsenic-free polyvinyl chloride sheath cable material as set forth in claim 1, wherein the plasticizer comprises dioctyl terephthalate and stearoyl chloride modified red phosphorus microcapsules in a mass ratio of 35-38:5-7.
  5. 5. The lead-arsenic-free polyvinyl chloride jacketed cable material as claimed in claim 4, wherein the preparation method of the stearoyl chloride modified red phosphorus microcapsule comprises the following steps: (1) Adding red phosphorus and melamine into water, adding boric acid and sodium hexametaphosphate, heating to 75-80 ℃, stirring for 4-5 h, cooling to 40-45 ℃, continuously stirring for 3-4 h, vacuum filtering, and drying to obtain red phosphorus nuclei; (2) Adding beta-cyclodextrin into pyridine, stirring for 1-2 hours at 70-80 ℃ to obtain beta-cyclodextrin solution, adding red phosphorus core and surfactant into pyridine, stirring uniformly, dripping beta-cyclodextrin solution at 70-80 ℃, stirring for 1-2 hours, adding diisocyanate, stirring continuously for 10-12 hours to form a shell layer, filtering, washing and drying to obtain red phosphorus microcapsule; (3) Dispersing the red phosphorus microcapsule in acetone, adding alkali liquor to control the pH to 8-8.5 under ice bath, slowly dripping stearoyl chloride, stirring for 0.5-1 hour, adjusting to be neutral, washing and drying to obtain the stearoyl chloride modified red phosphorus microcapsule.
  6. 6. The lead-arsenic-free polyvinyl chloride sheath cable material as set forth in claim 5, wherein the red phosphorus core comprises, by weight, 18-25 parts of red phosphorus, 3-4 parts of melamine, 1-3 parts of boric acid, 0.1-0.3 part of sodium hexametaphosphate and 150-180 parts of water; the red phosphorus microcapsule comprises the following raw materials in parts by weight, 5-6 parts of beta-cyclodextrin, 20-25 parts of red phosphorus core and 6-8 parts of diisocyanate; The raw materials of the stearoyl chloride modified red phosphorus microcapsule comprise red phosphorus microcapsule and stearoyl chloride, wherein the mass ratio of the red phosphorus microcapsule to the stearoyl chloride is 10:0.2-0.4.
  7. 7. The lead-arsenic-free polyvinyl chloride sheath cable material disclosed in claim 1 is characterized in that the polyvinyl chloride powder is one or two of SG3 and SG5, the anti-dripping agent is polytetrafluoroethylene, and the synergist is barium stearate.
  8. 8. The preparation method of the lead-arsenic-free polyvinyl chloride sheath cable material is characterized by uniformly mixing polyvinyl chloride resin powder, a plasticizer, a stabilizer, calcium carbonate, aluminum hydroxide, magnesium hydroxide, an anti-dripping agent and a synergist, and extruding and granulating at 130-160 ℃ to obtain the polyvinyl chloride sheath cable material.

Description

Lead-arsenic-free polyvinyl chloride sheath cable material and preparation method thereof Technical Field The invention relates to the technical field of polyvinyl chloride materials, and discloses a lead-arsenic-free polyvinyl chloride sheath cable material and a preparation method thereof Background The polyvinyl chloride material has the advantages of excellent insulativity, chemical stability, processing convenience and the like, is widely applied to cable sheath materials, and is particularly suitable for the working temperature requirement of underground mines, wherein the mining cable sheath material is generally in the class of 70 ℃. Lead and arsenic are generally introduced into the polyvinyl chloride sheath cable material under the working condition, so that the flame retardance is improved, and the lead salt can capture HCl, inhibit decomposition and improve the thermal stability. However, as GB/T43069-2023 starts to be executed in 4 months of 2025, the lead and arsenic contents of the cable material should be limited (the lead content should not be more than 1000mg/kg, and the arsenic content should not be more than 1000 mg/kg), and the common cable material cannot meet the national standard requirements. Thus, there is a need for a lead-arsenic free polyvinyl chloride jacketed cable material. In the prior art, however, the polyvinyl chloride sheath cable material without lead and arsenic has the following problems that firstly, the flame retardant performance needs to be improved, secondly, the temperature fluctuation of the environment under the mine is larger, and the 70 ℃ polyvinyl chloride sheath material is easy to age and degrade due to the influence of high temperature in the long-term use process, so that the material strength is reduced, the flame retardant performance is attenuated, and further safety accidents such as cable short circuit, electric leakage and the like are introduced, and the mine production safety is seriously threatened. In conclusion, research on the lead-and-arsenic-free polyvinyl chloride sheath cable material with excellent flame retardance and stable thermal aging resistance has important practical significance and industrial application value. Disclosure of Invention The invention aims to provide a lead-arsenic-free polyvinyl chloride sheath cable material and a preparation method thereof, so as to solve the problems in the background technology. In order to solve the technical problems, the invention provides the following technical scheme: The lead-arsenic-free polyvinyl chloride sheath cable material comprises, by weight, 100 parts of polyvinyl chloride resin powder, 40-45 parts of a plasticizer, 5-7 parts of a stabilizer, 10-15 parts of calcium carbonate, 10-15 parts of aluminum hydroxide, 2-4 parts of magnesium hydroxide, 0.5-2 parts of an anti-dripping agent and 0.2-1 part of a synergist; the stabilizer is folic acid modified Ca-Mg-Al-LDH. In a further scheme, the preparation method of the folic acid modified Ca-Mg-Al-LDH comprises the following steps: (1) Adding calcium nitrate, magnesium nitrate and aluminum nitrate into water, stirring and dissolving to obtain a salt solution, adopting a double-drop coprecipitation method, simultaneously dropwise adding cyanuric acid aqueous solution and alkaline solution, controlling pH to be 9-10, stirring for 6-8 hours, performing hydrothermal reaction at 160-170 ℃ for 10-12 hours, washing and drying to obtain Ca-Mg-Al-LDH; (2) Respectively dispersing folic acid and Ca-Mg-Al-LDH in water, then mixing, ultrasonically dispersing for 30-60 minutes, centrifuging and drying to obtain the folic acid modified Ca-Mg-Al-LDH. In a further scheme, the raw materials of the Ca-Mg-Al-LDH comprise the following components of 0.6-0.7 part of calcium nitrate, 6-7 parts of magnesium nitrate, 2-3 parts of aluminum nitrate and 3-4 parts of cyanuric acid; in the folic acid modified Ca-Mg-Al-LDH raw material, the mass ratio of folic acid to Ca-Mg-Al-LDH is 1-2:5. In a further scheme, the plasticizer consists of dioctyl terephthalate and stearoyl chloride modified red phosphorus microcapsules with the mass ratio of 35-38:5-7. In a further scheme, the preparation method of the stearoyl chloride modified red phosphorus microcapsule comprises the following steps of: (1) Adding red phosphorus and melamine into water, adding boric acid and sodium hexametaphosphate, heating to 75-80 ℃, stirring for 4-5 h, cooling to 40-45 ℃, continuously stirring for 3-4 h, vacuum filtering, and drying to obtain red phosphorus nuclei; (2) Adding beta-cyclodextrin into pyridine, stirring for 1-2 hours at 70-80 ℃ to obtain beta-cyclodextrin solution, adding red phosphorus core and surfactant into pyridine, stirring uniformly, dripping beta-cyclodextrin solution at 70-80 ℃, stirring for 1-2 hours, adding diisocyanate, stirring continuously for 10-12 hours to form a shell layer, filtering, washing and drying to obtain red phosphorus microcapsule; (3) Dispersing th