Patent ID: 9505254
Filing Date: 2016-11-29
CPC Classification: B41M,B65B,C09D

Claim Text:
1. A method of obtaining a substrate with an ink formulation, comprising the steps of: providing a substrate; coating said substrate with an ink formulation, said ink formulation comprising a thermo activated acid generator (TAG) and a halochromic leuco dye, said thermo activated acid generator being selected form the group consisting of: an amine salt of an organic metal compound comprising boron or silicone according to formula I: wherein X is silicon or boron; n is an integer greater than or equal to 1 and less than or equal to 5; o is an integer being 0 (zero) or 1; p is an integer being 0 (zero) or 1; E and F are each selected from the group consisting of: wherein each R6 and R7 are individually selected from the group consisting of hydrogen, C1-4-alkyl, C1-4-alkoxy, halogen, amino and carboxy; whenever X=silicon, then o=1, p=0, and RI is aryl, aralkyl or C1-4-alkyl, or o=1, p=1, and R1 and R2 together form a residue selected from the group consisting of a, b, c, d, e, f, g and h; whenever X=boron, then o=0 and p=0; and R3, R4 and R5 are individually selected from the group consisting of hydrogen, C1-12-alkyl, C1-6-hydroxyalkyl, allyl, aralkyl and arylsulfonyl, in which aralkyl or arylsulfonyl may be substituted with C1-4-alkyl; or R3 and R4 together with the nitrogen to which they are attached form a morpholino or piperidine ring, and R5 is selected from the group consisting of hydrogen, C1-12-alkyl, C1-6-hydroxyalkyl, allyl, aralkyl and arylsulfonyl, in which aralkyl or arylsulfonyl can be substituted with C1-4-alkyl; and amine neutralized polyalkylnaphthalene polysulphonic acid derivatives; covering said coated substrate with a thermoplastic polymer layer, such that the ink formulation is situated between the substrate and the thermoplastic polymer layer and/or in the thermoplastic polymer layer, wherein said step of covering said ink formulation with said thermoplastic polymer layer is performed by melt extrusion: wherein said polymer is a polyolefin, and the temperature of the polymer melt in said melt extrusion ranges from 200 to 340° C.