Abstract: The present invention is generally in the field of measuring and indicating techniques and relates to a time-temperature indicating device and methods of manufacturing and reading this device. More specifically, the time-temperature indicator (TTI) device comprises at least one active reactant being at least a part of a component that is configured to be either an electrical component or transformable into an electrical component, said at least one active reactant being selected to be affectable by a chemical and/or physical reaction effecting a change in at least an electrical property of said electrical component at a rate that is time-temperature dependent.

Abstract: The present invention relates to photochromic spiropyrans as active ingredients of Time-Temperature Indicators (TTIs), and to new spiropyrans per se. More particularly, the invention provides TTIs on the base of photochromic spiropyrans comprising alkylsulfanyl/arylsulfanyl substituents in the phenyl ring of the benzopyrane moiety.

Abstract: The present invention relates to a time temperature indicator for indicating a temperature change over time comprising one dimeric or trimeric spiropyran indicator of the formula I or II wherein R1-R4 independently of one another is hydrogen, —C1C6 alkoxy, halogen, CF3, —C1C6 alkyl or —NO2, R5 is hydrogen, halogen, —C1-C6 alkoxy, —COOH, —COO—C1-C6 alkyl, —CF3 or phenyl; R11 is hydrogen or R11 and R5 form together a phenyl ring; Ra is —C1-C6 alkyl Rb is —C1-C6 alkyl, or together with Ra form a 5-6 membered ring L is a divalent linker; L? is a trivalent linker.

Abstract: The present invention is generally in the field of measuring and indicating techniques and relates to a time-temperature indicator and methods of manufacturing and use thereof. More specifically, the time-temperature indicator comprises a time temperature indicator comprising at least one metal layer or metal containing layer and in direct contact to the metal layer or to the metal containing layer at least one doped polymer layer, wherein the dopant is an acid, a base or a salt or a photolatent acid or a photolatent base which dopant is added to the polymer, and/or at least one polymer layer wherein a polymer is functionalized with acidic or latent acidic or basic or latent basic groups; or a time temperature indicator comprising at least one polymer layer containing metal particles and a photolatent acid or a photolatent base, or at least one polymer layer containing metal particles wherein the polymer is functionalized with latent acidic or latent basic groups.

Abstract: The present invention relates to time-temperature indicator (TTI) systems comprising spiropyran indicator of formula (I) wherein R1 is hydrogen, —C1-C6 alkoxy, halogen, —C1-C6 alkyl or —NO2, R2 is hydrogen or —C1-C6 alkoxy; R3 is NO2 halogen; R4 is hydrogen, —C1-C6 alkoxy or halogen; R5 is hydrogen, halogen, —C1-C6 alkoxy, —COOH, —COO—C1-C6alkyl, —CF3 or phenyl; R11 hydrogen or R11 and R5 form together a phenyl ring; Y is phenyl, naphthyl, anthracen-9-yl, 9H-fluoren-9-yl or a residue Formula (A) wherein R6 is hydrogen, halogen, —C1-C6 alkoxy, —NO2, —CF3, —O—CF3, —CN, —COO—C1-C6alkyl, phenyl or biphenyl, 9H-fluoren-9-yl; R7 is hydrogen, halogen, —CN,—C1-C6 alkoxy or R7 and R6 form together a phenyl ring; R8 is hydrogen, halogen, —CN, or —C1-C6 alkoxy; R9 is hydrogen or halogen or CN. R10 is hydrogen or halogen or CN. Ra is —(CH2)n- with n=1-6 or —CH2—CH?CH—. With the proviso that Formula (B) and Formula (C) are excluded.