A low temperature processable radiation crosslinked ethylene-tetrafluoroethylene copolymer material

Abstract

The invention discloses an irradiation cross-linked ethylene-tetrafluoroethylene copolymer material capable of low temperature processing, which comprises the following materials in parts by weight: 100 parts of ethylene-tetrafluoroethylene copolymer, the cross-linked ethylene-tetrafluoroethylene The molar ratio of C-F group to C-H group of ethylene copolymer is 1: (2-9); 0.3-3 parts of crosslinking agent; 0.3-8 parts of heat-resistant agent; 0.3-3 parts of antioxidant ; 1-10 parts of antimony trioxide; 0.1-3 parts of pentaerythritol stearate; 0.1-2 parts of N′N-ethylene bisstearamide; 0.1-3 parts of white oil. The invention can be processed at a temperature of 200°C to 238°C, has low processing temperature, good crosslinking effect and stability, can effectively improve the heat resistance of the material, and has no obvious or small amount of smoke in the production process.

Description

technical field [0001] The invention relates to a radiation cross-linked ethylene-tetrafluoroethylene copolymer material which can be processed at low temperature. Background technique [0002] The ethylene-tetrafluoroethylene copolymer (ETFE) currently used in cables is also known as F40, a transparent crystalline material, which is the strongest and lightest fluoroplastic. ETFE has excellent dielectric, insulating and mechanical properties, radiation resistance, crack resistance, aging resistance, resistance to various chemical solvents, high and low temperature resistance, and the long-term working temperature is between -65 ° C and 150 ° C. After ETFE resin is cross-linked and irradiated, its radiation resistance, tensile strength and anti-aging performance are greatly improved. [0003] However, the current X-ETFE material is easy to self-polymerize in the production process, and has strict requirements on the processing temperature. The processing temperature needs to...

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Problems solved by technology

[0003] However, the current X-ETFE material is easy to self-polymerize in the production process, and has strict requirements on the processing temperature. The processing temperature needs to reach 280°C to 300°C. After the color is further deepened

Chinese Patent Publication No. 105061876A discloses a radiation-crosslinked ethylene-tetrafluoroethylene copolymer insulating material with adjustable performance. By introducing a composite crosslinking agent containing crosslinking agent prepolymer technology, the improvement and Solve the problems of high smoke generation, poor thermal stability and yellowing of the crosslinking agent in the above production process. The disadvantage is that the preparation of the crosslinking agent prepolymer is difficult and the stability needs to be improved, which is unfavorable for industrial use.

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