Wire insulation sheath material with self-repairing function and preparation method thereof

Abstract

The invention relates to a wire insulation sheath material with a self-repairing function and a preparation method of the wire insulation sheath material, and the preparation method specifically comprises the following steps: adding polydimethylsiloxane into a solvent, conducting stirring and heating, adding polyisocyanate, conducting heating for reaction to obtain a polyurethane prepolymer, adding polyvinyl chloride and chlorinated rubber, and continuously conducting reacting for 3-5 hours; and sequentially adding a disulfide bond-containing chain extender, conducting heating to 100-120 DEG C, conducting reacting for 5-8 hours, finally adding activated calcium carbonate, talcum powder, aluminum oxide and a flame retardant, and conducting stirring for 3-5 hours at the temperature of 100-120 DEG C to obtain the wire insulation sheath material. The wire insulation sheath material prepared by the invention not only has excellent properties of polyurethane and organic silicon materials, but also can complete a high-efficiency self-repairing process under mild conditions to protect internal wires from being damaged.

Description

technical field [0001] The invention belongs to the technical field of wire insulation materials, and in particular relates to a wire insulation sheath material with self-repair function and a preparation method thereof. Background technique [0002] With the development of the economy, the popularity of electrical appliances is getting higher and higher, and the use of wires is also increasing. The current wire insulation layer is mainly made of polyvinyl chloride, and it is made by adding corresponding additives. However, due to the poor heat resistance, flame retardancy and aging resistance of polyvinyl chloride, the service life of the wire is short, and the safety and reliability are poor. Therefore, in the current production process, additives of lead, barium, and cadmium will be added to PVC, and these additives containing harmful heavy metal elements will also be damaged after long-term use of the wire, thereby dissolving in the natural environment. The environment ...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the technical defects of lack of repairing technology specifically for wire insulation sheath damage and the technical defect that the damaged surface of wire insulation sheath is easily enlarged after partial or slight damage in the prior art, the invention provides a wire insulation sheath material with self-repairing function According to the invention and its preparation method, the insulating sheath material can automatically repair minor damage, prevent further damage to the insulating sheath of the wire, and is safer and more reliable.