Polyolefin insulator material with long-lasting hydrophobic properties

Abstract

The invention provides a polyolefin insulator material with long-lasting hydrophobic properties. The polyolefin insulator material comprises, by weight, 40-55 parts of polyethylene, 30-50 parts of polypropylene, 8-20 parts of decabromodiphenylethane, 3-7 parts of antimonous oxide, 0.2-0.5 part of an antioxidant, 0.5-1.5 parts of silicone, 0.2-0.5 part of a light stabilizer and 1-10 parts of a modified silicone oil composition. The modified silicone oil composition is prepared by reacting fatty acid with side-chain amino silicone oil under the protection of nitrogen at a temperature of 80-150 DEG C for a plurality of hours, and is used as a hydrophobic migration agent for the polyolefin insulator material. The polyolefin insulator material of the invention is used for polyolefin insulator sheds / sheaths, satisfies the requirements of insulators for electrical insulation performance, flame retardancy and mechanical properties, and further imparts the insulators with long-acting hydrophobicity, hydrophobic migration performance, antifouling properties and the like.

Description

technical field [0001] The invention relates to a polyolefin insulator material with long-term water-repellent properties, which belongs to the field of insulator material manufacture. Background technique [0002] The insulator is an important component of the mechanical connection between the conductor and the tower on the overhead transmission line, and plays the role of insulating the conductor and the tower and increasing the creepage distance. At present, silicone rubber composite insulators have become the fastest-growing and most widely used third-generation insulators in transmission lines. They have comprehensive properties such as light weight, convenient transportation and installation, corona resistance, and ozone resistance, especially their excellent hydrophobicity. And the hydrophobic migration characteristics, which can make the hydrophobicity of the insulator surface penetrate the dirt layer attached to the umbrella cover, so that the surface of the dirt la...

AI Technical Summary

Problems solved by technology

[0003] However, due to the low body strength and insufficient rigidity of the silicone rubber insulating material, the umbrella cover made of it is easy to be trampled, damaged by birds, damaged by aging and cracked during line installation or maintenance, which brings great harm to its long-term application reliability. Negative Effects

In order to solve the problem of low strength of silicone rubber insulators, domestic and foreign are currently devoting themselves to the research and development of polymer insulators: for example, the invention patent application CN109135002A discloses a polymer insulator material and its preparation method, the material is made of polyethylene, polypropylene, methyl The composition of silicone rubber and inorganic filler, according to the mass percentage, polyethylene accounts for 40-55%, polypropylene accounts for 5-15%, methyl silicone rubber accounts for 10-15% (average molecular weight is 500,000-600,000) and filler accounts for 15%. -45%, the purpose of the invention is to solve the problem of poor electrical corrosion resistance of polymer insulator materials

[0004] Although polyolefin insulator materials have begun to be developed and tested, the main concerns are in terms of mechanical properties, insulation properties, and flame retardant properties. The design of hydrophobicity and hydrophobicity migration is insufficient. The reason may be that the general-purpose small molecule silicone oil Water migration agent has poor compatibility with polyolefin materials and cannot be added on demand; even if a small amount of silicone oil migration agent is barely added to polyolefin materials, it will migrate out of the surface of the insulator quickly, which is not good for the long-term use of polyolefin insulators, especially In severely polluted areas, pollution flashover of insulators will occur and seriously affect the safety of power transmission