Agfa Gevaert Nv

Agfa-gevaert

Vera Drieghe

Ingrid E Geuens

Johan August Loccufier

Bart Waumans

Walther Wouters

Peter Cantraine

A security laminate () including in order a transparent oriented polyester support (), a subbing layer () and an adhesive layer () which is coated on top of the subbing layer, wherein the binder of the adhesive layer is based on a mixture of a first and a second polymer in a weight ratio from 50/50 to 90/10, wherein the first polymer is a copolymer comprising vinyl acetate and at least 85 wt % of vinyl chloride based on the total weight of the first polymer; wherein the second polymer is a copolymer of styrene, butadiene and methylmethacrylate or a copolymer of vinyl butyral, vinyl acetate and vinyl alcohol; and wherein the binder of the subbing layer is based on a polyester-urethane copolymer.

PET-C based security laminates and documents

A method of preparing a security laminate including the steps of: a) providing a polyethylene terephthalate substrate (); b) stretching the polyethylene terephthalate substrate in either a longitudinal or a transversal direction; c) coating and drying a first coating composition () on the stretched polyethylene terephthalate substrate; d) stretching the coated polyethylene terephthalate substrate in the longitudinal or transversal direction not selected in step b) in order to obtain a coated biaxially stretched polyethylene terephthalate substrate having a layer of the first coating composition with a dry thickness between 50 nm and 400 nm; e) coating and drying a second coating composition () on top of the dry layer on the biaxially stretched substrate, wherein the first coating composition contains a copolymer selected from the group consisting of a hydroxyl&#x2014;functional, partially-hydrolyzed vinyl chloride/vinyl acetate copolymer and a polyester-urethane copolymer; and wherein the second coating composition contains a hydroxyl&#x2014;functional, partially-hydrolyzed vinyl chloride/vinyl acetate copolymer. Security laminates and security documents containing them are also disclosed.

A black and white monosheet substantially light-insensitive thermographic recording material comprising a support and a thermosensitive element, the thermosensitive element containing a substantially light-insensitive organic silver salt, an organic reducing agent therefor in thermal working relationship therewith, a binder and at least one toning agent, wherein the at least one toning agent is selected from compounds represented by formula (I):wherein Ris an alkyl group optionally substituted with a hydroxy, carboxy, carboxy ester, acyl or carbonato group; X is S, O or N&#x2014;R; Ris an optionally substituted alkyl group; R, R, Rand Rindependently represent a hydrogen atom, a halogen atom or an alkyl, an alkoxy, a thio-alkoxy, a nitro, a cyano, a carboxy, a carboxy ester, an acyl, an aldehyde, an acylamido, a sulphonamido, an acylamino, a carbonato, a hydroxy or an aryl group or at least one of Rand R, Rand Rand Rand Rindependently represent the atoms necessary to form a carbocyclic or heterocyclic group or at least one of Rand Rand Rand Rindependently represent the atoms necessary to form a heterocyclic ring; and compounds represented by formula (II):wherein Ris an optionally substituted alkyl group; Y is S, O or N&#x2014;R; Ris an optionally substituted alkyl group; Rand Rindependently represent a hydrogen atom, a halogen atom or an alkyl, an alkoxy, a thio-alkoxy, a nitro, a cyano, a carboxy, a carboxy ester, an acyl, an aldehyde, an acylamido, a sulphonamido, an acylamino, a carbonato, a hydroxy or an aryl group or Rand Rrepresent the atoms necessary to form a heterocyclic or a non-aromatic carbocyclic ring or at least one of Rand Rand Rand Rindependently represent the atoms necessary to form a heterocyclic ring; and both Rand Rcannot both be an alkyl group.

Toning agents for use in substantially light-insensitive recording materials

A black and white monosheet thermographic recording material comprising a support and a thermosensitive element, the thermosensitive element containing a substantially light-insensitive organic silver salt, an organic reducing agent therefor in thermal working relationship therewith, a binder and at least one toning agent, wherein the at least one toning agent is represented by formula (I):wherein Ris a hydrogen atom or an alkyl, an alkenyl, an alkynyl, a cycloalkyl, an alkaryl, an aryl, a heterocyclic or a heteroaryl group all of which may be optionally substituted; with the proviso that Rmay not be a hydrogen atom if both Rand Rare both hydrogen atoms; Rand Rare independently a hydrogen or a halogen atom or an amino, amide, ester, carboxy, carbonate, alkyl, alkenyl, alkynyl, cycloalkyl, alkaryl, aryl, heterocyclic or heteroaryl group all of which may be optionally substituted; Rand Rmay together represent the atoms necessary to complete a heteroaromatic ring with no more than one nitrogen atom, an alicyclic or a heterocyclic group which all may be optionally substituted; and X is a carbonyl group, or is &#x2014;N&#x2014;R, where Ris an alkyl group.

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Kontich, Belgium

Vera Drieghe