The invention provides a
coating film for synthetic aromatic beads as well as a preparation method and application of the
coating film, and belongs to the technical field of macromolecules. The
coating is divided into an inner-layer coating solution layer and an outer-layer coating solution layer, wherein the inner-layer coating solution contains temperature-sensitive grafted
cyclodextrin,
cellulose acetate, a
plasticizer and hydrophobic nano inorganic molecules; and the outer coating solution contains waterborne
polyurethane, a hardening agent, a
fluorocarbon surface additive and a cross-linking agent. Through the
composite structure of the intelligent controlled-release inner layer and the firm protective outer layer, collaborative optimization of performance is realized. The inner layer realizes stable release of fragrance at normal temperature and intelligent slow release of fragrance triggered by body temperature. And the outer layer constructs a durable barrier with high
hardness,
wear resistance,
ultraviolet resistance, hydrophobicity and antifouling property. By means of the design, the product integrates intelligent fragrance saving and lasting protection, the defect that a traditional coating material is single in function is effectively overcome, the user experience of the
solid fragrance product is remarkably improved, and the service life of the
solid fragrance product is remarkably prolonged.