Liquid silicone rubber for middle-high voltage cold-shrinkable cable accessory dry terminal and preparation method of liquid silicone rubber

Abstract

The invention discloses a liquid silicone rubber for a middle-high voltage cold-shrinkable cable accessory dry terminal and a preparation method of the liquid silicone rubber. The liquid silicone rubber is mainly prepared from the following components in parts by weight: 60-85 parts of vinyl terminated hexamethyldisilazane, 20-40 parts of gaseous-phase white carbon black, 5-15 parts of hexamethyldisilazane, 10-20 parts of nanometer aluminum hydroxide, 0.1-0.3 part of carbon black, 1-2 parts of platinum-1,3-divinyl-1,1,3,3-tetramethyldisiloxane, 1-2 parts of low hydrogen containing silicone oiland 5-10 parts of a silane coupling agent. The preparation method mainly comprises the following steps of base glue preparation, grinding, filtering, A component and B component preparation and the like. According to the preparation method provided by the invention, after actual testing, a liquid silicone rubber product has good insulating performance and has enough mechanical performance at thesame time, is difficult in tensile deformation and can thoroughly meet the use requirement for middle-high voltage cold-shrinkable accessories in production. The liquid silicone rubber provided by theinvention has the advantages of strong insulating performance, better fluidity, good tensile rebound resilience and the like.

Description

technical field [0001] The invention belongs to the technical field of liquid silicone rubber materials and preparation methods thereof, and in particular relates to a liquid silicone rubber for medium and high pressure cold-shrinkable cable accessories and a preparation method thereof. Background technique [0002] High-voltage cables are currently the main channel for urban power supply. With the development of economy in recent years, cities have become more and more dependent on electricity, and have higher and higher requirements for power supply reliability. However, due to the limitation of production and transportation of high-voltage cables, the length of a single cable is generally only a few hundred meters, and the lead-out and extension of the cable depend on special cable terminals and cable intermediate joints. The heat-shrinkable cable termination technology currently used in the prior art has a service life of only 4 to 5 years due to the limitation of materi...

AI Technical Summary

Problems solved by technology

Although silicone rubber itself has good electrical properties, if the existing silicone rubber in the prior art is to be used in medium and high voltage electrical fields, it needs to be modified for its comprehensive performance indicators.

Images