초록 ▼

The invention relates to a substrate for packaging of or for attachment to products which are sensitive to aging and temperature, having a planar time-temperature integrator comprising a matrix and at least one reversible indicator embedded therein, which has photochromic properties on the basis of

The invention relates to a substrate for packaging of or for attachment to products which are sensitive to aging and temperature, having a planar time-temperature integrator comprising a matrix and at least one reversible indicator embedded therein, which has photochromic properties on the basis of transfix reactions, arranged in the region of the substrate.

대표청구항 ▼

What is claimed is: 1. Substrate for packaging of or for attachment to products which are sensitive to aging and temperature, having a time-temperature integrator arranged in the region of the substrate, wherein the time-temperature integrator contains a matrix and at least one reversible, crystall

What is claimed is: 1. Substrate for packaging of or for attachment to products which are sensitive to aging and temperature, having a time-temperature integrator arranged in the region of the substrate, wherein the time-temperature integrator contains a matrix and at least one reversible, crystalline indicator embedded therein, which has photochromic properties on the basis of transfer reactions in crystalline materials, and wherein further the reversible indicator is characterized by discoloration following photo-induced coloration thereof, the discoloration of the reversible indicator proceeding as a function of both time and temperature. 2. Substrate according to claim 1, wherein the substrate is a packaging material. 3. Substrate according to claim 1, wherein the transfer reactions are based on the transfer of charged or uncharged hydrogen atoms or hydrogen isotopes. 4. Substrate according to claim 1, wherein the reversible indicator has a skeletal structure according to the general formula I; wherein A1-A5=carbon atom and/or heteroatom R1-R4=hydrogen atom and/or isotope thereof, and/or Cl, F, Br , or a substituent selected from the group consisting of alkyl groups, methyl or aryl groups, and phenyl groups R5=hydrogen atom or isotope thereof, or a substituent selected from the group consisting of Cl, F, Br, an alkyl group, a methyl group, an aryl group, phenyl group, and pyridine R6=hydrogen atom or isotope thereof B1-B7=carbon atom and/or heteroatom R1-R10=hydrogen atom and/or an isotope thereof, and/or one or more Cl, F, Br, amino groups, nitro groups, or one or more substituents selected from the group consisting of alkyl groups, methyl or aryl groups, and phenyl groups, R11=nitro group or a cyano group or a carboxylic acid group or a variant selected from the group consisting of an ester, amide, ketone or aldehyde group. 5. Substrate according to claim 1, wherein the reversible indicator has a skeletal structure according to the general formula II: wherein A1-A12=carbon atom and/or a heteroatom R1-R7=hydrogen atom and/or isotope thereof, and/or Cl, F, B, or substituents selected form the group consisting of alkyl groups, methyl or aryl groups, and phenyl groups R8=hydrogen atom or isotope thereof, or a substituent selected from the group consisting of Cl, F, Br, an alkyl group, phenyl group, and pyridine R9=hydrogen atom or isotope thereof B1-B7=carbon atom and/or heteroatom R10-R13=hydrogen atom and/or isotope thereof, and/or one or more Cl, F, Br, amino groups, nitro groups, or one or more substituents selected from the group consisting of alkyl groups, methyl or aryl groups, and phenyl groups R14=a nitro group, a cyano group, a carboxylic acid group, an ester, an amide, a ketone, or an aldehyde group. 6. Substrate according to claim 5, wherein in the general formula II, R4=NO2 and 2-4 NO2 groups are present. 7. Substrate according to claim 4, wherein in the general formula I, R4=NO2 and 2-4 NO2 groups are present. 8. Substrate according to claim 1, wherein the transfer reactions are based on large, charged or uncharged groups. 9. Substrate according to claim 1, wherein the transfer reactions are based on a charged or uncharged halogen atom. 10. Substrate according to claim 1, wherein the reversible indicator has more than one characteristic time domain. 11. Substrate according to claim 1, wherein at least two reversible indicators having different characteristic time domains are embedded in the matrix. 12. Substrate according to claim 1, wherein at least one irreversible indicator having photochromic properties is arranged in the region of the reversible indicator. 13. Substrate according to claim 1, wherein the time-temperature integrator has a filter which is impermeable to light which effects photo-induced coloration of the reversible indicator. 14. Substrate according to claim 13, wherein the filter is impermeable to light in the wavelength range of below approximately 430 nm. 15. Substrate according to claim 1, wherein the substrate includes a reference scale arranged in the region of the time-temperature integrator. 16. Substrate according to claim 1, wherein the matrix is a polymer film. 17. Substrate according to claim 1, wherein the substrate is a polymer film. 18. Substrate according to claim 1, wherein a substrate region forms the matrix for the reversible indicator. 19. Process for determination of quality of products which are sensitive to aging and temperature comprising the steps of: a) providing a substrate for packaging of or for attachment to a product which is sensitive to aging and temperature, having a time-temperature integrator arranged in the region of the substrate, wherein the time-temperature integrator contains a matrix and at least one reversible, crystalline indicator embedded therein, which has photochromic properties on the basis of transfer reactions in crystalline materials, and wherein further the reversible indicator is characterized by discoloration following photo-induced coloration thereof, the discoloration of the reversible indicator proceeding as a function of both time and temperature; b) effecting photo-induced coloration of the, reversible indicator; and c) determining the degree of time-related and temperature-related discoloration and the quality of the product taking into account the degree of discoloration. 20. Process according to claim 19, wherein the determination of the quality of the product is effected by evaluating the degree of discoloration with the aid of a reference scale. 21. Process according to claim 19, further comprising the step of providing an irreversible indicator having photochromic properties, the irreversible indicator arranged in the region of the reversible indicator, and wherein further the irreversible indicator is applied after photo-induced coloration of the reversible indicator. 22. Process according; to claim 19, further comprising the step of providing the time-temperature integrator with a filter that is impermeable to light which effects photo-induced coloration of the reversible indicator, and wherein further the filter is applied after photo-induced coloration. 23. Process according to claim 19, wherein the photo-induced coloration of the reversible indicator is effected by UV or near UV light. 24. Process according; to claim 19, wherein the photo activation of the time-temperature integrator is effected by irradiation of the side of the time-temperature integrator opposite the filter.