Explanation

It is a special coatings composed of macromolecule resin, inorganic filler (calcium carbonate, silicon dioxide, glass fiber, glass microsphere or ceramics beads, graphite, etc.) and additive (dispersing agent, curing agent, plasticizer, defoamer), which has vibration damping, heat insulation and certain sealing performance. In the early stage, it was mainly made of coal tar pitch, polyurethime and other materials added with specific fillers, which contained a large amount of VOC, seriously polluted the environment and seriously damaged the body of construction workers. It has been phased out and replaced by water-based materials. The water-based damping paint is composed of acrylic acid 1PN lotion with core-shell structure, damping pigments and fillers, flame retardant or fire retardant, additive, etc. It mainly uses water as the dispersion medium, with low volatile organic compound content, safety and environmental protection. It can be divided into free damping structure and constrained damping structure. The free damping structure is to stick a layer of viscoelastic damping material with a certain thickness on the surface of the substrate. When the substrate produces bending vibration, the damping layer vibrates with the basic layer, which generates tension and compression deformation in the damping layer and dissipates energy, thus playing a role in vibration reduction and noise reduction. More representative free such as 3101 multifunctional water-based damping paint. The constrained damping structure is further bonded with a high modulus elastic layer on the outer surface of the damping layer. When the damping layer produces bending vibration along with the basic structural layer and causes tension and compression deformation of the damping layer, the elasticity layer will act as a constraint and produce shear deformation, thus losing more energy. The more representative constrained damping paint is 3109 constrained damping paint. It can be widely used for vibration reduction on the surface of metal plate structures in aircraft, ships, vehicles, and various machinery.

Classification