High-temperature-aging-resistant crosslinked ethylene-tetrafluoroethylene copolymer material

Abstract

The invention relates to a high-temperature-aging-resistant crosslinked ethylene-tetrafluoroethylene copolymer material which is composed of the following components in parts by mass: an ethylene-tetrafluoroethylene copolymer, a prepolymer crosslinking agent, N,N'-bis[beta- (3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hydrazine, 1,3,5-tri(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanuric acid, antimony trioxide, antimony pentoxide, N,N'-ethylene bis stearamide, pentaerythritol stearate and white oil. The weight average molecular weight of the prepolymer crosslinking agent is 600-3000; the weight ratio of the 1,3,5-tri(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanuric acid to the N,N'-bis[beta- (3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hydrazine is 3:(0.9-1.2), and the weight ratio of the 1,3,5-tri(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanuric acid to the N,N'-bis[beta- (3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hydrazine is 3:1. The copolymer material has excellent stability, and the processed finished product is very white in color and can not discolor even under irradiation.

Description

technical field [0001] The invention relates to special wire and cable materials, in particular to radiation crosslinked ethylene-tetrafluoroethylene copolymer insulating material. Background technique [0002] Ethylene-tetrafluoroethylene copolymer (ETFE), also known as F40, is a transparent crystalline material with a melting point of 265-280°C. It is the strongest and lightest fluoroplastic. ETFE has excellent dielectric, insulating and mechanical properties, radiation resistance, crack resistance, aging resistance, various chemical solvent resistance, high and low temperature resistance, long-term working temperature between -65°C and 150°C. After ETFE resin is irradiated and cross-linked, its radiation resistance, tensile strength and aging resistance are greatly improved, and its long-term working temperature is increased to 200°C. It is widely used in special cable insulation materials, such as transportation, aviation, chemical and nuclear plants, Insulation of vari...

AI Technical Summary

Problems solved by technology

At present, the technology of X-ETFE insulating material is mastered by a few well-known foreign wire and cable manufacturers. It is expensive and has a long delivery cycle. In special times, sales control is implemented in my country.

The current XETFE insulation material produces a large amount of smoke during the production process and pollutes the environment; the crosslinking agent is easy to self-polymerize, and has strict requirements on processing temperature, poor thermal stability during processing, easy to turn yellow, and the color deepens after irradiation

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