A polyolefin insulator material with long-lasting hydrophobic properties

Abstract

A polyolefin insulator material with long-term water-repellent properties, composed of 40-55 parts of polyethylene, 30-50 parts of polypropylene, 8-20 parts of decabromodiphenylethane, 3-7 parts of trioxide The composition consists of antimony, 0.2-0.5 parts of antioxidant, 0.5-1.5 parts of silicone, 0.2-0.5 parts of light stabilizer and 1-10 parts of modified silicone oil. The modified silicone oil composition is prepared by reacting fatty acid and side-chain amino silicone oil under nitrogen protection at 80-150°C for several hours, and is used as a hydrophobic migration agent for polyolefin insulating materials. The invention is used for the polyolefin insulator sheath / sheath, which meets the requirements of the insulator on electrical insulation, flame retardancy and mechanical performance, and also endows it with long-term and effective performances such as hydrophobicity, hydrophobicity migration and antifouling.

Description

Technical field [0001] The present invention is a polyolefin insulator material having long active hydrotrophone characteristics, belonging to the field of insulator material manufacturing. Background technique [0002] The insulator is an important composition of the wire and the tower machine on the overhead transmission line and the insulation of the wire and the tower and the increase of creepage distance. At present, silicone rubber composite insulators have become the fastest development of transmission lines, the most widely used third generation insulation, with a quality light, convenient transportation installation, high resistance, ozone resistant, especially it has excellent hydrophobicity. As well as the hydrophobic migration characteristics, the hydrophobicity of the surface of the insulator can make the surface of the stalastic layer have hydrophobic, thereby avoiding the insulator under dirty humidity under dirty humidity to cause stains to a certain extent Flashi...

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