[EN] HYDROCHROMIC COATINGS AND RELATED METHODS<br/>[FR] REVÊTEMENTS HYDROCHROMIQUES ET PROCÉDÉS APPARENTÉS
申请人:CHROMATIC TECH INC
公开号:WO2019161190A1
公开(公告)日:2019-08-22
Solvent-based coatings comprising at least one bydrochromic compound that changes color upon contact with an aqueous or polar liquid are disclosed. The hydrochromic coatings can be printed on a variety of substrates, in the form of complex graphic designs if desired, and are substantially resistant to leaching. The coatings are suitable for use as wetness indicators, for example, in absorbent personal care products that have the coating applied to at least part of the product to alert the user that the article has been exposed to water, urine or other aqueous or polar fluids. The solvent-based coatings may also be used as authenticity indicators, for example, in currency instruments, asset titles and legal instruments, such as money, checks, stock certificates, property titles, contracts, notary seals and the like.