Hot-melt adhesive for preventing corrosion of repaired mouth of pipeline

Abstract

The invention relates to the technical field of corrosion of repaired mouths of engineering and petroleum pipelines, in particular to a hot-melt adhesive for preventing the corrosion of a repaired mouth of a pipeline. The hot-melt adhesive comprises the following components in percentage by weight: 30 to 70 percent of epoxidized SBS (styrene-butadiene-styrene) resin, 5 to 40 percent of vinyl copolymer, 5 to 40 percent of rubber elastomer, 5 to 40 percent of tackifying resin, 5 to 20 percent of inorganic filler and 1 to 8 percent of aid; and the hot-melt adhesive is prepared by performing melt blending on the components by using an intensive shear banbury, and performing extrusion granulation by using a twin-screw extruder. The hot-melt adhesive for preventing the corrosion of the repaired mouth of the pipeline, which is prepared from the epoxidized SBS resin serving as a base material, solves the problem that the conventional hot-melt adhesive has insufficient toughness and brittle failure at low temperature and low peel strength at high temperature. The hot-melt adhesive has high toughness at low temperature and high peel strength at high temperature, hardly falls off or allows water to enter the pipeline in the long-term running process, is convenient to construct in field, has excellent bonding property and ensures reliable bonding.

Description

technical field [0001] The invention relates to the technical field of engineering and petroleum pipeline joint anticorrosion, in particular to a hot melt adhesive for pipeline joint anticorrosion. Background technique [0002] Long-distance oil and gas pipeline transportation is the fifth largest transportation mode after road, railway, waterway, and air transportation. It plays an increasingly prominent role in the oil and gas industry and even the world economy. For flammable, explosive, and volatile oil and gas , the best way of transportation is airtight pipeline transportation. [0003] The construction of anti-corrosion joints is an important process in the on-site construction of long-distance pipelines, and it is also a link that is prone to problems in the construction. Existing methods of jointing include petroleum asphalt jointing, epoxy coal tar jointing, adhesive tape jointing, epoxy primer jointing and PE heat shrinkable material jointing and other methods. ...

AI Technical Summary

Problems solved by technology

Among them, hot-melt adhesives are mainly prepared with EVA as the main material, which has poor low-temperature toughness and low high-temperature peel strength. When peeling off, the interface is usually damaged, and the bonding performance to high-density polyethylene and surface-dry epoxy primer is poor. It is easy to fall off in the middle, and the water ingress leads to corrosion of the pipeline, which makes the overall anti-corrosion of the pipeline fall short, not only economic losses, but also major hidden dangers of accidents

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