Sicpa Holding Sa

Tristan Jauzein

Andrea Callegari

Brahim Kerkar

Eric Decoux

Thomas Tiller

Olivier Rozumek

Frédéric Gremaud

Sabine Mayade

Cécile Pasquier

Stéphanie Rascagneres

Disclosed is a substrate which has thereon a marking or layer comprising a salt-free cured chiral liquid crystal precursor composition which comprises one or more nematic compounds A and one or more chiral dopant compounds B which are capable of giving rise to a cholesteric state of the chiral liquid crystal precursor composition and are of formula (I) as set forth herein. A modifying resin made from one or more polymerizable monomers comprising an average of at least one ether functionality per polymerizable group is disposed between the substrate and the marking or layer and in contact with the marking or layer in one or more areas thereof. The modifying resin changes the position of a selective reflection band exhibited by the cured chiral liquid crystal precursor composition on the substrate in the one or more areas.

Salt-free composite marking based on chiral liquid crystal precursors comprising chiral acrylate dopants

Disclosed is a substrate which has thereon a marking or layer comprising a cured chiral liquid crystal precursor composition which does not contain any salt that would change the position of a selective reflection band exhibited by the cured composition. A modifying resin made from one or more polymerizable monomers comprising an average of at least one ether functionali typer polymerizable group is disposed between the substrate and the marking or layer and in contact with the marking or layer in one or more areas thereof. The modifying resin changes the position of a selective reflection band exhibited by the cured chiral liquid crystal precursor composition on the substrate in the one or more areas.

Composite marking based on chiral liquid crystal precursors and modifying resins

Described is a marking for a substrate. The marking comprises at least one luminescent substance (a) and at least one chiral liquid crystal polymer (CLCP) material (b) having a reflection wavelength range that overlaps at least a part of the luminescence wavelength range of (a), provided that at least a part of (b) is not located underneath (a).

Marking comprising a chiral liquid crystal polymer and a luminescent substance

Described is a chiral liquid crystal polymer (CLCP) layer or pattern which comprises randomly distributed craters of controlled mean diameter and/or density. The density and/or mean diameter of the craters can be controlled, for example, by adjusting the wetting of a substrate by a CLCP precursor composition, the development time of the precursor composition, and the thickness of the applied precursor composition.

Chiral liquid crystal polymer layer or pattern comprising randomly distributed craters therein

A substrate having thereon a marking or layer comprising a cured chiral liquid crystal precursor composition which comprises at least one salt that changes the position of a selective reflection band exhibited by the cured composition compared to the position of a selective reflection band exhibited by a cured composition that does not contain the at least one salt. A modifying resin made from one or more polymerizable monomers is disposed between the substrate and the marking or layer and changes the position of the selective reflection band exhibited by the cured precursor composition comprising the at least one salt on the substrate in the one or more areas. This abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.

Composite marking based on chiral liquid crystal precursors

Disclosed is a marking for an article, item or substrate. The marking comprises a printable code, at least a part of which is covered by a chiral liquid crystal polymer (CLCP) layer, and further preferably including an intermediate layer including a distribution of flakes, to provide readable information of at least two different types on the article.

Marking comprising a printable code and a chiral liquid crystal polymer layer

A chiral liquid crystal precursor composition which comprises at least one salt that changes a position of the selective reflection band exhibited by the composition in a cured state compared to the position of a selective reflection band exhibited by a composition in the cured state that does not contain the at least one salt. This abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.

Simplified control of color shifting properties of a chiral liquid crystal polymer

Coding flake or film including at least two chiral liquid crystal polymer (CLCP) layers with a first CLCP layer that has a first detectable parameter and a second CLCP layer including a second detectable parameter; at least one additional layer including a third detectable parameter, the at least one additional layer comprising a material that is not a chiral liquid crystal polymer; and wherein at least the third detectable parameter is different from each of the first detectable parameter and the second detectable parameter.

Multilayer flake with high level of coding

The present invention relates to a marking on an item or substrate, which marking is based on a chiral nematic (also called cholesteric) liquid crystal precursor composition. Prior to curing the chiral liquid crystal precursor composition in the chiral liquid crystal state at least one optical property exhibited by the composition is modified by two modifying agents of different types in at least one area of the item or substrate.

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Lausanne, Switzerland

Tristan Jauzein