High-low temperature anti-corrosion viscoelastic filler and preparation method thereof

Abstract

The invention discloses a high and low temperature type anti-corrosion viscoelastic body filler. The high and low temperature type anti-corrosion viscoelastic body filler is characterized by comprising a protective film, a viscoelastic body paste layer and an isolation film. The protective film is a polyethylene film; the isolation film is a polyester isolation film; and the viscoelastic body paste layer is composed of the following raw materials by mass: 33-36% of middle molecular weight polyisobutylene, 10.5-12.5% of low molecular weight polyisobutylene, 50-55% of precipitated barium sulphate, 1-1.5% of an antioxidant and 0.5-0.6% of phthalocyanine green. A preparation method of the high and low temperature type anti-corrosion viscoelastic body filler comprises the steps of kneading the raw materials to obtain daub; sending the daub into a reaction kettle for mixing; extruding by an extruder; coating on the isolation film; plying up the protective film; and rolling by a double-roller machine to obtain a product. The high and low temperature type anti-corrosion viscoelastic body filler is not restricted by the high and low temperatures, has self-repairing functions, is used as a sealing and filling anti-corrosion material for special-shaped pipes such as special-shaped steel elbows, bends, three-way gate valves and flanges, is environment-friendly and convenient for use, and has a good filling and sealing effect.

Description

technical field [0001] The invention belongs to special-shaped pipeline anticorrosion materials, and relates to a high-low temperature anticorrosion viscoelastic filling material and a preparation method thereof. The high and low temperature anti-corrosion viscoelastic filling material provided by the invention is especially suitable for sealing and filling anti-corrosion and repairing of oil and gas buried steel pipeline joints, as special-shaped steel elbows, elbows, three-way gate valves and insulation methods Sealing and filling anti-corrosion materials for special-shaped pipes such as blue plates. Background technique [0002] In the prior art, the anticorrosion and repair of buried steel pipe joints such as thermal insulation pipelines for transportation of oil and natural gas, refined oil, and crude oil, etc. generally use radiation cross-linked polyethylene heat shrinkable tape (sleeve), wherein the elbow tee method The anticorrosion of special-shaped pipe fittings ...

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Problems solved by technology

[0002] In the prior art, the anticorrosion and repair of buried steel pipe joints such as oil and gas, refined oil, and crude oil, etc., generally use radiation cross-linked polyethylene heat shrinkable tape (sleeve), wherein the elbow tee method The anticorrosion of special-shaped pipe fittings such as blue pans generally adopts cold wrapping tape and viscoelastic tape; the existing viscoelastic tape can only be used on the main pipeline, and it is difficult to use on special-shaped pipe fittings. Anti-corrosion of special-shaped pipe fittings such as insulating flanges; before construction and use of cold-wound tapes and viscoelastic tapes, tees and flanges must be polished and painted, and uneven special-shaped parts cannot be polished and filled, resulting in insulation pipes for transportation Such defects as buried steel pipes with poor anti-corrosion and sealing effects are likely to cause hidden dangers such as safety and serious consequences

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