Clear Matt Coating Silane Treatment Matting Efficiency

The patent changes the surface parameters of spherical organic particles by applying a silane treatment that creates nanoscale roughness on the particle surface. This surface modification transforms the particles from smooth spherical shapes with poor matting efficiency to particles with enhanced light-scattering capability, achieving matting efficiency comparable to irregular inorganic particles while maintaining the advantages of organic particles.

The patent creates a composite structure by combining spherical organic particles with silane surface treatment. The core particle remains organic and spherical, while the surface layer provides the necessary roughness for effective matting. This composite approach allows the coating to benefit from both the formulation ease of organic particles and the matting efficiency typically associated with irregular inorganic particles.

The patent changes the surface parameters of the particles through silane treatment, creating nanoscale roughness that enhances light scattering. This allows the use of smaller, more monodisperse particles (0.5-30 microns) to achieve high matting efficiency without the need for large particle sizes or broad size distributions, thereby maintaining film smoothness.

The patent transitions the matting mechanism from relying on macroscopic particle size and shape variations to utilizing nanoscale surface features. By creating surface roughness at the nanometer scale through silane treatment, the particles achieve enhanced light-scattering capability without increasing their overall size or creating macroscopic film roughness.