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Preparation method of modified polyvinyl chloride jacket used for cable production

A polyvinyl chloride sheath, polyvinyl chloride technology, applied in the direction of plastic/resin/wax insulators, organic insulators, electrical components, etc., to achieve improved anti-cracking functions, improved thermo-oxidative stability and service life, and improved smoke production. low effect

Inactive Publication Date: 2018-04-06
铜陵市远维线缆有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a cable sheath material, once it cracks, it will cause serious consequences

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A preparation method for a modified polyvinyl chloride sheath used in cable production, which is prepared from the following components in parts by weight: 110 parts of polyvinyl chloride, 25 parts of dioctyl terephthalate, and triisooctyl phosphite 15 parts of ester, 18 parts of aluminum hydroxide, 15 parts of magnesium hydroxide, 6 parts of flame retardant, 4 parts of epoxy soybean oil, 2.0 parts of butanone, 1.0 parts of N,N-dimethylformamide, γ-methyl 0.4 part of acryloyloxypropyltrimethoxysilane, 0.2 part of stearic acid, 0.3 part of polyethylene wax, 0.05 part of nano cerium oxide, and 0.03 part of nano zirconia. The preparation method comprises the following steps:

[0017] (1) Dry nano-cerium oxide and nano-zirconia in a vacuum oven at 90°C for 3 hours, and then dissolve them with a mixture of deionized water and absolute ethanol at a mass ratio of 1:4. The ratio of solid to liquid is 1:3, then ultrasonically dispersed for 30 minutes, stirred at a constant speed...

Embodiment 2

[0024] A preparation method for a modified polyvinyl chloride sheath used in cable production, which is prepared from the following components in parts by weight: 115 parts of polyvinyl chloride, 28 parts of dioctyl terephthalate, triisooctyl phosphite 18 parts of ester, 19 parts of aluminum hydroxide, 17 parts of magnesium hydroxide, 7 parts of flame retardant, 5 parts of epoxy soybean oil, 2.5 parts of butanone, 1.1 parts of N,N-dimethylformamide, γ-methyl 0.5 part of acryloyloxypropyltrimethoxysilane, 0.25 part of stearic acid, 0.4 part of polyethylene wax, 0.06 part of nano cerium oxide, and 0.04 part of nano zirconia. The preparation method comprises the following steps:

[0025] (1) Dry nano-cerium oxide and nano-zirconia in a vacuum oven at 95°C for 3.5 hours, and then dissolve them with a mixture of deionized water and absolute ethanol at a mass ratio of 1:4.5. The ratio of solid to liquid is 1:3.5, and then ultrasonically dispersed for 35 minutes, stirred at a constan...

Embodiment 3

[0032] A method for preparing a modified polyvinyl chloride sheath used in cable production, which is prepared from the following components in parts by weight: 120 parts of polyvinyl chloride, 30 parts of dioctyl terephthalate, and triisooctyl phosphite 20 parts of ester, 20 parts of aluminum hydroxide, 20 parts of magnesium hydroxide, 8 parts of flame retardant, 6 parts of epoxy soybean oil, 3.0 parts of butanone, 1.2 parts of N,N-dimethylformamide, γ-methyl 0.6 part of acryloyloxypropyl trimethoxysilane, 0.3 part of stearic acid, 0.5 part of polyethylene wax, 0.08 part of nano cerium oxide, and 0.05 part of nano zirconia. The preparation method comprises the following steps:

[0033] (1) Dry nano-cerium oxide and nano-zirconia in a vacuum drying oven at 100°C for 4 hours, and then dissolve them with a mixture of deionized water and absolute ethanol at a mass ratio of 1:5. The ratio of solid to liquid is 1:4, and then ultrasonically dispersed for 40 minutes, stirred at a con...

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Abstract

The invention relates to the technical field of cable processing and production, and discloses a method for preparing a modified polyvinyl chloride sheath used in cable production. Nanomaterials are used to modify polyvinyl chloride, and the addition of metal nanoparticles increases the The distance between the polyvinyl chloride copolymer molecules reduces the cohesive energy of the molecular chain, thereby reducing the environmental stress cracking performance. The proportion of fractures in the test of low-temperature impact embrittlement performance at minus 40°C is within 0-0.01%, which can meet the requirements. The requirement of working at minus 40°C improves the comprehensive usability of polyvinyl chloride. It can pass the combustion test of UL910 or NFPA 262 when used as a cable sheath. The oxygen index reaches 50, and the amount of smoke is low. Oxygen stability and service life are significantly improved, and the resistance to cracking in stressful environments is improved.

Description

technical field [0001] The invention belongs to the technical field of cable production and processing, and in particular relates to a preparation method of a modified polyvinyl chloride sheath used for cable production. Background technique [0002] Polyvinyl chloride, referred to as PVC, is a thermoplastic resin polymerized by vinyl chloride under the action of an initiator. It is a homopolymer of vinyl chloride. Vinyl chloride homopolymers and vinyl chloride copolymers are collectively referred to as vinyl chloride resins. PVC is a white powder with an amorphous structure and a small degree of branching. The molecular weight of industrially produced PVC is generally in the range of 50,000 to 120,000, with a large polydispersity, and the molecular weight increases with the decrease of the polymerization temperature; there is no fixed melting point, it starts to soften at 80-85°C, and becomes viscoelastic at 130°C , 160 ~ 180 ℃ began to change into a viscous flow state; ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L91/00C08L23/06C08K13/02C08K3/22C08K3/38C08K3/24C08K3/34H01B3/44
CPCC08L27/06C08K2003/2213C08K2003/2224C08K2003/2227C08K2003/2244C08K2003/387C08K2201/003C08K2201/011C08L2201/08C08L2203/202C08L2205/03H01B3/443C08L91/00C08L23/06C08K13/02C08K3/22C08K3/2279C08K3/38C08K3/24C08K3/346
Inventor 汪兆根
Owner 铜陵市远维线缆有限公司
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