Reversible thermosensitive color-changing transformer early-warning insulating sheath material and preparation method thereof

Abstract

The invention discloses a reversible thermosensitive color-changing transformer early-warning insulating sheath material and a preparation method thereof. The sheath material is prepared from the following raw material components in parts by weight: 50 to 80 parts of silicone rubber, 10 to 15 parts of polypropylene resin, 10 to 30 parts of a styrene thermoplastic elastomer, 10 to 15 parts of dioctyl maleate, 30 to 40 parts of fumed silica, 15-20 parts of nano wollastonite, 10-20 parts of a reversible thermochromic material, 3 to 5 parts of filling oil, 20 to 40 parts of a flame retardant, 3 to5 parts of a compatilizer, 1 to 5 parts of a vulcanizing agent and 1 to 5 parts of an antioxidant. The sheath material prepared by the invention is a transformer insulation sheath material capable ofinstantly and reversibly changing color in a relatively large temperature range, so that an early warning function is achieved, and the sheath material has excellent mechanical and physicochemical properties.

Description

technical field [0001] The invention relates to the technical field of sheath material preparation, in particular to an early warning insulating sheath material for a reversible thermochromic transformer and a preparation method thereof. Background technique [0002] The transformer insulating sheath is used for the shielding and insulating protection of the surface of the transformer busbar bridge tube, which can effectively prevent the exposed transformer busbar bridge from being accidentally touched by humans, birds and beasts and other small animals or foreign objects. Electrical accidents caused by dew flashover, pollution flashover, and icicle sticking to snow, and prevent power outage accidents caused by salt spray, acid rain and chemical gas corrosion damage to the transformer inlet and outlet lines. [0003] However, the existing transformer sheath materials have poor high and low temperature resistance, and are prone to decomposition or even ignite at high temperat...

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Problems solved by technology

[0003] However, the existing transformer sheath materials are poor in high and low temperature resistance. They are prone to decomposition at high temperatures, and even ignited. They are prone to embrittlement and peeling off at low temperatures, resulting in short circuits, electric leakage, power outages and other accidents, resulting in huge economic losses.

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