Ciba Specialty Chemicals Corporation

Basf Se Corporation

Ciba Corporation

Thomas Bolle

Michelle Richert

Roland Fleury

Pascal Hayoz

Jean-Pierre Wolf

Dario Lazzari

Hugh Stephen Laver

Hans Reichert

Mirko Rossi

Thomas Sch&auml;fer

Ramanathan Ravichandran

David G Leppard

Raymond R Seltzer

Andreas Valet

Kurt Dietliker

Stephen Mark Andrews

Dirk Simon

Marc Schnieper

André Fuchs

Markus Grob

Peter Simmendinger

Thomas Ulrich

Igor Zhurminsky

Disclosed herein is a method for forming a surface relief microstructure, including the steps of A) applying a curable composition to at least a portion of the frontside of the paper substrate, B) contacting at least a portion of the curable composition with surface relief microstructure, C) curing the composition by using at least one UV lamp which is arranged on the backside of the paper substrate, and D) depositing a metallic layer, and optionally a layer of a transparent high refractive index material, on at least a portion of the cured composition, wherein the UV lamp has an emission peak in a UV-A range of 320 nm to 400 nm and additionally in a near VIS range of 400 nm to 450 nm, the curable composition comprises a photoinitiator which absorbs in the UV-A range and also in the near VIS range.

Printing diffraction gratings on paper and board

The instant invention pertains to a method for the production of brilliant glossy metal coatings on paper substrates. Further aspects of the invention are a paper product obtainable using the method and the use of such a paper for decorative or packaging purposes.

High gloss metal effect papers

A method and an apparatus for forming a surface relief microstructure, especially an optically variable image on a paper substrate are provided, the method comprising the steps of: A) applying a curable composition to at least a portion of the frontside of the paper substrate; B) contacting at least a portion of the curable composition with surface relief microstructure, especially optically variable image forming means; C) curing the composition by using at least one UV lamp () which is arranged on the backside of the paper substrate; D) optionally depositing a layer of a transparent high refractive index material and/or a metallic layer on at least a portion of the cured composition, wherein the lamp () having emission peak(s) in the UV-A and near VIS range and the curable composition comprises at least a photoinitiator which absorbs in the UV-A region and preferably in the near VIS range. A paper product obtainable uses the method and an apparatus for forming a surface relief microstructure on a paper substrate. Surface relief microstructures, such as holograms may be replicated rapidly and with accuracy on a paper substrate by using the method and the apparatus.

The present invention is in the field of security documents, more particularly in the field of security elements aimed to protect security documents against copying (illegal reproduction) and counterfeiting. It discloses a security element having a security feature which changes its visual appearance after irradiation with light, especially with UV light and at rotation and/or tilting. Security documents comprising said security element, as well as a method for producing said security element, are also disclosed.

Security element

A time temperature indicator for indicating temperature change over time is provided, comprising an immobilized enzyme and a substrate of the enzyme, wherein the reaction of the substrate catalyzed by the enzyme produces a reaction product in a time and temperature dependent manner and wherein the formation of the reaction product can be detected by monitoring a physical characteristic of the substrate and/or the product which is linked to its concentration. Also provided is a method of time temperature indication comprising the step of an enzyme-catalyzed reaction, a method of printing the enzyme-based time temperature indicator on a packaging material or a label, a printing ink or printing ink concentrate comprising components of the enzyme-based time temperature indicator and a packaging material or a label comprising the enzyme-based time temperature indicator.

Enzyme-based time temperature indicator

Compounds of formula (I), wherein Ris hydrogen or alkyl; Ris C-Calkoxy or a morpholino radical; and Ris hydrogen or C-Calkoxy, are suitable for improving the solubility of specific photoinitiators in formulations and accordingly enhance the storage stability of formulations comprising a photoinitiator and compounds of formula (I) 

Storage stability of photoinitiators

Compounds of the general formula I' in which R, Rand Rindependently of one another, are H or &#x2014;Y&#x2014;T as defined in claimwhere T is a reactive group selected from OH, acryl- and methacryloxy and arylcarbonate groups, and further symbols are as defined in claimare effective as crosslinking agents for polymeric networks, especially as in flexographic printing plates, coatings, and plastic containers or films. Further provided is a method of protecting the content of a clear or lightly colored plastic container or film against the deleterious effects of ultraviolet radiation, which method comprises permanently and covalently bonding one or more UV absorbing moieties of a durable s-triazine UV absorber via condensation to a suitable polymer component.

2-hydroxyphenyl-s-triazine crosslinkers for polymer networks

Morpholinones as light stabilizers

Trisresorcinyltriazines

Triresorcinyl triazines

Stabilization of wood substrates

The invention relates to new compounds containing 1-8 active groups of the type 3,3,6,6-polysubstituted 2-morpholinone and having the formula F

Mixtures comprising a compound of the formula I and a compound of the formula II ##STR1## in which E.sub.1 and E.sub.2 ##STR2## q is 0 or 1, p and k are each 1 or 2, and the remaining symbols are as defined in claim 1, are outstandingly suitable for stabilizing organic material, especially coating materials.

Stabilizer combination

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Efringen-Kirchen, Germany

Thomas Bolle