Method for forming self-cleaning coating comprising hydrophobically-modified particles
AssigneeIndustrial Technology Research Institute
InventorsYuan-Chang Huang, Yuung-Ching Sheen, Yih-Her Chang, Kuo-Feng Lo
Life of this patent
Estimating the term…
Abstract
A method for forming self-cleaning coating comprising hydrophobically-modified particles. Micro- or nano-particles are treated with a hydrophobic agent and an additive to form larger particles with the hydrophobic agent and the additive bonded thereto. A binder or crosslinker is attached to the larger particles by forming chemical bonds with at least one of the additive, the hydrophobic agent, and the particles, thus forming a coating material capable of forming self-cleaning coating.
Claims22
A method for forming a self-cleaning coating on a substrate, comprising the steps of:
- forming a coating material by providing micro or nano-particles;
- treating the micro or nano-particles with a hydrophobic agent and an additive to form larger particles with the hydrophobic agent and the additive bonded thereto, wherein the step of treating the micro or nano-particles with the additive and the hydrophobic agent is effected at a pH of about 6.5-14, and wherein the additive promotes hydrolysis and condensation reactions of the micro or nano-particles such that the micro or nano-particles grow into the larger particles;
- and attaching a binder or crosslinker to the larger particles by reacting the binder or crosslinker with at least one of the additive, the hydrophobic agent, and the particles;
- applying the coating material to the substrate;
- and
- drying or curing the coating material to form a solid coating having a microstructured, hydrophobic surface,
- wherein the hydrophobic surface of the coating is such that water forms a contact angle of at least 130°.
Dependencies are inferred from the claim text.