Super-hydrophobic building waterproof coating with refrigeration performance and preparation method thereof

Abstract

The present application relates to the technical field of building coating, and more particularly to a super-hydrophobic building waterproof coating with refrigeration performance and a preparation method thereof; the coating comprises: 100 parts of polyurethane, 30-50 parts of flaky particles with visible light refractive index greater than or equal to 1.5, 10-20 parts of hollow spherical particles with visible light refractive index greater than or equal to 1.4, 10-20 parts of hydrophobic nanoparticles and 30-40 parts of rod-shaped particles with a ratio AR of long axis to short axis greater than or equal to 5. The present application breaks the contradiction that it is difficult to achieve both high reflection and high hydrophobicity by introducing flaky particles, hollow spherical particles, hydrophobic nanoparticles and rod-shaped particles with synergistic effect; by using a small amount of hydrophobic particles (less than or equal to 20 parts) in cooperation with high-refraction particles, both >92% reflectivity and >145° contact angle are achieved, thereby solving the bottleneck of traditional solutions that the light performance decreases with the increase of hydrophobic agent, the difficulty in construction of multi-layer structure, and the problem that it is difficult to achieve both high reflectivity and hydrophobicity.

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