Insulating coating composition

Abstract

The present invention relates to an insulating coating composition, a substrate coated with such an insulating coating composition, and a method for protecting a substrate using the insulating coatingcomposition. The present invention relates to an insulating coating composition comprising at least the following components: a) a chemically toughened epoxy resin component wherein the toughening segments are elastomeric segments bonded to the epoxy resin by chemical reaction and the proportion of toughening segments is 20-49% by weight, based on the total weight of the chemically toughened epoxy resin component; b) a curing agent; c) reinforcing fibers; and d) a low density filler having a density in the range of 0.05-0.7 g / cm3, preferably 0.08-0.5 g / cm3, more preferably 0.1-0.4 g / cm3.

Description

technical field [0001] The present invention relates to an insulating coating composition, a substrate coated with the insulating coating composition and a method for protecting a substrate using the insulating coating composition. Background technique [0002] During the extraction, storage and transportation of liquefied natural gas, there may be a risk of leakage of liquefied natural gas (Liquid4Natural Gas-LNG, usually as low as -162°C) due to impact, severe vibration or long-term corrosion. The leaked ultra-low temperature liquid will cause the surrounding steel structure to cool down sharply in a short period of time, thereby causing the cold and brittle phenomenon of the steel, causing the steel to crack and break, leading to the collapse of the structure, and causing further disasters. [0003] In order to delay the sharp cooling of the steel structure when encountering ultra-cold liquid, the relevant steel structure will be protected from heat, such as polyurethane ...

AI Technical Summary

Problems solved by technology

The composition is coated on substrates such as steel to provide corrosion and chipping resistance, but there is no mention of providing thermal protection at very low temperatures

[0005] However, these epoxy resin-based coatings of the prior art usually crack or fall off when encountering ultra-low temperatures due to the internal stress generated by the shrinkage of the coating that is greater than the cohesion of the coating or the adhesion of the coating to the substrate / primer , thereby reducing the thermal insulation performance and failing to achieve the expected protective effect

In severe cases, it may drive the fireproof coating on the substrate to crack or even fall off, which will further affect the fireproof performance

In addition, these ordinary epoxy resin-based low-temperature thermal insulation coatings usually have high thermal conductivity and low thermal insulation efficiency.

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