Waterborne fluorocarbon modified acrylic polyurethane coating

Abstract

The invention discloses a waterborne fluorocarbon modified acrylic polyurethane coating which comprises a component A and a component B. The ratio of the component A to the component B is (3: 1)-(10:1), wherein the component A is prepared from the following components in percentage by mass: 45-65% of waterborne fluorocarbon modified acrylic resin, 3%-5% of sericite powder, 15%-25% of titanium dioxide, 0.2%-1% of a defoaming agent, 0.3%-0.8% of a wetting dispersant, 0.1%-0.6% of a water-based rheological additive, 0.3%-0.6% of a bactericidal preservative, 0.4%-0.8% of a mildew preventive, 3%-15% of glass microspheres, 5%-15% of ceramic microspheres, 1%-15% of deionized water, 2%-5% of a coalescing agent and 0.3%-0.6% of a pH regulator; and the component B is prepared from a dimer / trimer ofHDI, alcohol ether and an alcohol ester solvent. The waterborne fluorocarbon modified acrylic polyurethane coating is a two-component waterborne polyurethane reflective heat-insulation anticorrosivecoating used on the surfaces of equipment such as steel vacuum pipelines and steel storage tanks of high-speed trains. The reflective heat-insulation anticorrosive coating has good reflective, heat-insulation and anticorrosive capabilities, achieves excellent effects in environmental protection, heat-insulation and anticorrosive properties, and is lighter in weight, convenient to coat and longer in service life.

Description

technical field [0001] The invention relates to a two-component water-based polyurethane reflective, heat-insulating, reflective and anti-corrosion coating for vacuum pipelines of high-speed trains, in particular to a water-based fluorocarbon-modified acrylic polyurethane coating. Background technique [0002] Speed ​​is the eternal goal pursued by rail transit. Compared with aviation and road transportation, rail transportation has obvious advantages in terms of energy saving and environmental protection, and it is a transportation mode respected by the sustainable development of society. As a modern mode of transportation, rail transit should further increase the operating speed, develop 500-600km / h high-speed maglev transportation and 1000km / h above ground ultra-high-speed rail transit, which is the key to social progress, modern development and sustainable development of rail transit in the future. the only way. However, due to the influence of the dense atmosphere on ...

AI Technical Summary

Problems solved by technology

Steel pipes have the advantages of convenient manufacture, low manufacturing cost, easy on-site installation and good pipe sealing, but steel pipes are easily affected by sunlight

Sunlight, on the one hand, the heat of the sun will cause a large temperature difference between the day and night of the pipeline body, and the thermal expansion and contraction of the steel pipeline, which requires the pipeline to have an adjustment device for thermal expansion and contraction of the pipeline, and at the same time, corresponding sealing measures are required to make the pipeline structure and Complicated composition

At the same time, thermal expansion and contraction lead to inconsistent thermal expansion and contraction of the track carrying the train in the pipeline and the linear motor of the traction train with the pipeline body, resulting in extrusion or cracking of the track and linear motor, affecting the normal operation of the train, otherwise It is necessary to have the track and linear motor also be equipped with a growth adjustment device that can expand and contract with the heat of the pipeline, making the structure of the track and linear motor more complicated

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