Inner wall anti-drag environment-friendly coating for long-distance pipeline and preparation method thereof

Abstract

The invention provides an inner wall anti-drag environment-friendly coating for a long-distance pipeline. The coating comprises a component A and a component B, wherein the component A is prepared from the following raw materials in parts by weight, 40 to 45 parts of E51 epoxy resin, 5 to 10 parts of toughening resin, 0.3 to 1.0 part of a dispersant, 8 to 15 parts of a pigment, 15 to 20 parts of precipitated barium sulfate, 10 to 20 parts of silica powder, 0.5 to 1.5 parts of an anti-settling auxiliary agent, 0.1 to 1.0 part of an antifoaming agent, 0.3 to 1 part of a leveling agent, 3 to 5 parts of a silane coupling agent and 4 to 6 parts of polytetrafluoroethylene wax powder. The component B is prepared from 40 to 50 parts of alicyclic amine modified polyamide polymer and 50 to 60 partsof modified amine. The coating meets a preheating double-pipe feeding high-pressure airless spraying construction mode, can be thinly sprayed to form a film with the thickness of 60-150 microns at a time, is a low-viscosity thinly-coated environment-friendly coating and has excellent toughness and wear resistance and drag reduction performance.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to an inner wall drag-reducing and environment-friendly coating for long-distance pipelines, and at the same time, the invention also relates to a preparation method of the coating. Background technique [0002] In the field of long-distance or long-term fluid transportation, the research and application of drag reduction technology has a long history. Drag reduction technology is widely used in various large-scale projects all over the world due to its performance advantages of low input and high output. The drag-reducing inner coating can greatly reduce the friction coefficient, increase the gas transmission volume, and reduce the gas transmission power. At the same time, the drag-reducing inner coating can also reduce the number of pigging times, reduce corrosion, and reduce operating costs. The economic and social benefits have been recognized in the industry through more than...

AI Technical Summary

Problems solved by technology

[0005] At present, the common dry gas-type drag-reducing and wear-resistant coatings cannot meet the requirements of rich gas transportation in terms of the above performance indicators, and further research and testing must be carried out on this basis

[0006] On the other hand, the solvent-based internal drag-reducing coatings currently used at home and abroad all contain about 50% solvent (weight ratio). During use, a large amount of solvent volatilizes, which has a great impact on the health of front-line operators

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