MULTILAYER SOLUBLE SOLID PRODUCT CONTAINING A COATING COMPOSITION AND ITS MANUFACTURING PROCESS Russian patent published in 2023 - IPC A61K8/02 B32B27/08 C11D17/04 C11D1/83 C11D11/00 

FIELD: personal hygiene.

SUBSTANCE: invention relates to multilayer soluble solid products for washing and personal hygiene products or for hair care containing a coating composition and the process of their manufacture. Soluble solid products contain multiple layers of flexible soluble porous sheets in which the coating composition is present on at least one inner surface of at least one sheet in these solid products. In the present invention, a method for manufacturing such solid products is also proposed. The invention provides a significantly improved dissolution profile compared to a soluble solid product without a coating composition, can function as a carrier for the active components contained in the coating composition, and can also ensure that two or more incompatible ingredients are present in the sheet and the coating composition, respectively.

EFFECT: soluble solid product has much greater flexibility compared to a soluble solid product without a coating composition and provides more compact products with the same amounts of surfactants, since the coating composition has a relatively high density.

32 cl, 15 dwg, 19 tbl, 6 ex