Oil-resistant EVA cable material and preparation technology thereof

A cable material and oil-resistant technology, applied in the field of cable materials, can solve the problem that the demand for oil resistance of cable materials has not been well resolved, and achieve the effect of improving oil resistance

Active Publication Date: 2019-04-16
STATE GRID SHANDONG ENERGY SAVING SERVICE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for modification of an elastomeric polymers called EPDMs by adding small amounts of certain chemical substances like vinyltriethoxysilanes or polystyrenesulfonamides into them instead of just making up everything from scratching off any layers on their surface. These modifications improve its ability to resist damage caused during use without losing strength over time. Additionally, this new type of plastic has improved electrical insulation compared to traditional materials made entirely of petrochemistry products due to less expensive raw components being added.

Problems solved by technology

This patents discusses how important factors affect the performance of oily resistive cables when exposed to different environments such as water or air due to their ability to absorb moisture during use without losing effectiveness over time. Current methods involve adding plasticizers like epoxy resins containing vinyl chloride (VCM) into these types of cords but they have limitations in terms of reducing VA levels below 10%. Therefore, it would be necessary to develop new ways to improve the oil barrier property of catheters made up of EVOH resin instead of traditional PEB resin.

Method used

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  • Oil-resistant EVA cable material and preparation technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of vinyl silane / styrene grafted ethylene-vinyl acetate copolymer: EVA with a VA content of 20% is used as raw material, and the mass ratio of vinyl to ethylene-vinyl acetate copolymer is 1:100 and 5:100. Silane and styrene, as well as a certain amount of initiator DCP, are fully dissolved with an appropriate amount of acetone, and then mixed evenly with a proportional amount of EVA. After the acetone was completely volatilized, it was melt-extruded and granulated at 200° C. on a twin-screw extruder, wherein the rotational speed of the twin-screw extruder was 50 rpm.

[0028] Preparation of oil-resistant EVA cable material: Weigh 60 parts of vinylsilane / styrene grafted ethylene-vinyl acetate copolymer, 15 parts of polyphenylene ether resin, 25 parts of aluminum hydroxide and 4 parts of silane coupling agent KH550. Mix aluminum hydroxide and silane coupling agent KH550 uniformly in a high-speed mixer, then add vinylsilane / styrene grafted ethylene-vinyl acet

Embodiment 2

[0030] Preparation of vinyl silane / styrene grafted ethylene-vinyl acetate copolymer: EVA with a VA content of 20% is used as raw material, and the mass ratio of vinyl to ethylene-vinyl acetate copolymer is 3:100 and 7:100. Silane and styrene, as well as a certain amount of initiator BPO, are fully dissolved with an appropriate amount of acetone, and then mixed evenly with a proportional amount of EVA. After the acetone was completely volatilized, it was melt-extruded and granulated at 200° C. on a twin-screw extruder, wherein the rotational speed of the twin-screw extruder was 50 rpm.

[0031] Preparation of oil-resistant EVA cable material: Weigh 60 parts of vinylsilane / styrene grafted ethylene-vinyl acetate copolymer, 15 parts of polyphenylene ether resin, 25 parts of zinc borate and 4 parts of borate coupling agent. Mix zinc borate and silane coupling agent KH550 uniformly in a high-speed mixer, then add vinyl silane / styrene grafted ethylene-vinyl acetate copolymer and p

Embodiment 3

[0033] Preparation of vinyl silane / styrene grafted ethylene-vinyl acetate copolymer: take EVA with VA content of 20% as raw material, weigh the vinyl with ethylene-vinyl acetate copolymer mass ratio of 2:100 and 8.5:100 Silane and styrene, as well as a certain amount of initiator BPO, are fully dissolved with an appropriate amount of acetone, and then mixed evenly with a proportional amount of EVA. After the acetone was completely volatilized, it was melt-extruded and granulated at 200° C. on a twin-screw extruder, wherein the rotational speed of the twin-screw extruder was 50 rpm.

[0034] Preparation of oil-resistant EVA cable material: Weigh 60 parts of vinylsilane / styrene grafted ethylene-vinyl acetate copolymer, 15 parts of polyphenylene ether resin, 12 parts of magnesium hydroxide, 13 parts of antimony oxide and 4 parts of silane coupling agent KH550. Mix zinc borate and silane coupling agent KH550 uniformly in a high-speed mixer, then add vinyl silane / styrene grafte

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Abstract

The invention provides an oil-resistant EVA cable material and a preparation technology thereof. The cable material comprises, by weight, 50-70 parts of a vinylsilane/styrene grafted ethylene-vinyl acetate copolymer (EVA-g-VS/ST), 5-20 parts of polyphenyl ether resin, 15-30 parts of a fire retardant and 1-5 parts of a coupling agent; the VA content of the ethylene-vinyl acetate copolymer is 10-28%, and the vinylsilane/styrene grafted ethylene-vinyl acetate copolymer is prepared through a melt extrusion method under the effect of an initiator. According to the material, the technical problem issolved that the oil resistance of the ethylene-vinyl acetate copolymer with low VA content is low, and meanwhile the obtained cable material has excellent flame retardance and mechanical performance.

Description

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Claims

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Application Information

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Owner STATE GRID SHANDONG ENERGY SAVING SERVICE
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