Spray-coating damping coating for ships and preparation method= thereof

Abstract

The invention provides a spray-coating damping coating for ships and a preparation method thereof, and belongs to the technical field of special functional materials. The spray-coating ship damping coating has a damping constraint structure, and a damping layer is a bi-component solvent-free polyurethane coating; the spray-coating ship damping coating comprises a component A and a component B, wherein the component A is a prepolymer synthesized by diisocyanate and polyol; the component B comprises a chain extender, polyol, a damping modifier, a damping pigment filler, a dispersing agent, a defoaming agent, a base material wetting agent, a catalyst, an adhesion promoter, a water removal agent and hollow microspheres; wherein the restraint layer is a double-component solvent-free epoxy resincoating and comprises a component A and a component B, the component A comprising liquid epoxy resin, an active diluent, a dispersing agent, a defoaming agent, a liquid flame retardant, a thixotropicagent, body filler and hollow microspheres, the component B comprising a modified amine curing agent, a defoaming agent, a thixotropic agent, benzyl alcohol and hollow microspheres. The coating disclosed by the invention can be sprayed for construction, is low in surface density and high in composite loss factor, has the loss factor of more than or equal to 0.15 at the temperature of -10 DEG C to50 DEG C, has excellent flame retardant property, and also has excellent sound insulation, heat insulation, corrosion prevention and other properties.

Description

technical field [0001] The invention relates to the technical field of special functional materials, more specifically, the invention relates to a sprayable damping coating for ships and a preparation method thereof. Background technique [0002] The vibration and noise of a ship are mainly composed of irregular combinations of sounds of different frequencies and intensities emitted by its own equipment when it is working and external wind and waves hitting the hull. Hull vibration and noise not only affect human health and work efficiency, but also adversely affect the life and structural safety of ships and the normal operation of electromechanical equipment. [0003] At present, it is the most feasible and economical method to apply damping material to ship vibration and noise reduction. Damping material is a new type of functional material prepared by utilizing the viscoelasticity of polymer. When the polymer material is in glass transition In the temperature range, it ...

AI Technical Summary

Problems solved by technology

[0006] However, the current damping coatings for constrained structures have the following disadvantages: (1) high viscosity, usually scraped coating construction, poor surface flatness, and the control of construction thickness and flatness mainly depends on the operator's proficiency and experience; (2) ) For narrow parts such as pipelines and equipment bases inside the hull, construction is very difficult, labor-intensive, and construction efficiency is low; (3) In order to meet the requirements of scraping construction, the materials used must have a suitable operating period, and The operating period of the material is closely related to the temperature, so that the formula system must be adjusted during summer and winter construction; (4) The density of current damping materials is generally too high, which cannot meet the lightweight requirements of modern ships; (5) The material The damping temperature range is narrow, and the composite loss factor is still low, which cannot meet the vibration and noise reduction requirements of large ships when sailing at high speed.

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