公开(公告)号：US12054619B2

公开(公告)日：2024-08-06

申请号：US18036341

申请日：2021-11-09

Applicant: SICPA HOLDING SA

Inventor： Hervé Pittet ,  Marlyse Demartin Maeder ,  Patrick Veya ,  Nikolay Grigorenko ,  Andre Oswald

IPC: C09D11/037 ,  B41M1/04 ,  B41M1/10 ,  B41M1/12 ,  B41M3/14 ,  B41M7/00 ,  B42D25/378 ,  C09D11/101 ,  C09D11/102

CPC classification number: C09D11/037 ,  B41M1/04 ,  B41M1/10 ,  B41M1/12 ,  B41M3/144 ,  B41M7/009 ,  B42D25/378 ,  C09D11/101 ,  C09D11/102

Abstract: The present invention provides a UV-Vis radiation curable security ink for producing a security feature for securing value documents, wherein said security feature exhibits a blue color upon viewing in transmitted light and a metallic yellow color upon viewing in incident light. The UV-Vis radiation curable security ink comprises a cationically curable or a hybrid curable ink vehicle, and silver nanoplatelets bearing a surface stabilizing agent of general formula (I)




wherein
the residue RA is a C2-C4alkyl group substituted with a hydroxy group; the residue RB is selected from a C1-C4 alkyl group, and a C2-C4alkyl group substituted with a hydroxy group; and Cat+ is a cation selected from the group consisting of Na+, K+, Cs+ and Rb+.

公开(公告)号：US12215242B2

公开(公告)日：2025-02-04

申请号：US18252452

申请日：2021-11-09

Applicant: SICPA HOLDING SA

Inventor： Hervé Pittet ,  Marlyse Demartin Maeder ,  Patrick Veya ,  Nikolay Grigorenko ,  Andre Oswald

IPC: C09D11/50 ,  B41M3/14 ,  B42D25/378 ,  C08K3/08 ,  C08K7/00 ,  C08K9/04 ,  C09D11/03 ,  C09D11/037 ,  C09D11/101 ,  C09D11/102 ,  C09D11/106

Abstract: The present invention provides a UV-Vis radiation curable security ink for producing a security feature for securing value documents, wherein said security feature exhibits a blue color upon viewing in transmitted light and a metallic yellow color upon viewing in incident light. The UV-Vis radiation curable security ink comprises a cationically curable or a hybrid curable ink vehicle, and silver nanoplatelets bearing a surface stabilizing agent of general formula (I) wherein the residue RA is a C2-C4alkyl group substituted with a hydroxy group; the residue RB is selected from a C1-C4alkyl group, and a C2-C4alkyl group substituted with a hydroxy group; and Cat+ is an ammonium cation of general formula +NH2RCRD, wherein the residue RC is a C2-C4alkyl group substituted with a hydroxy group; and the residue RD is selected from a C1-C4alkyl group, and a C2-C4alkyl group substituted with a hydroxy group.

公开(公告)号：US12043047B2

公开(公告)日：2024-07-23

申请号：US17921038

申请日：2021-04-22

Applicant: SICPA HOLDING SA

Inventor： Hervé Pittet ,  Marlyse Demartin Maeder ,  Patrick Veya ,  Nikolay Grigorenko ,  Andre Oswald ,  Michelle Richert

IPC: B41M3/14 ,  B41M7/00 ,  C09D11/03 ,  C09D11/101 ,  C09D11/106 ,  C09D11/50

CPC classification number: B41M3/142 ,  B41M7/0081 ,  B41M7/009 ,  C09D11/03 ,  C09D11/101 ,  C09D11/106 ,  C09D11/50

Abstract: The present invention provides a process for manufacturing a security feature for securing a value document, wherein said security feature exhibits a blue color upon viewing in transmitted light and a metallic yellow color upon viewing in Incident light. The manufacturing process comprises the following steps: a) printing a specific UV-Vis radiation curable ink on a transparent or partially transparent region of a substrate of a value document; b) heating the ink layer obtained at step a) at a temperature of about 55° C. to about 100° C. for at least one second so that the ink layer exhibits a metallic yellow color upon viewing in incident light; and c) UV-Vis curing the ink layer obtained at step b) to form the security feature. The manufacturing process according to the present invention enables the expedient production of security features exhibiting a blue color upon viewing in transmitted light and a metallic yellow color upon viewing in incident light and is particularly useful for industrial printing of value documents.

公开(公告)号：US11891527B2

公开(公告)日：2024-02-06

申请号：US17055851

申请日：2019-02-19

Applicant: SICPA HOLDING SA

Inventor： Marlyse Demartin Maeder ,  Claude-Alain Despland

IPC: C09D11/10 ,  C09D11/101 ,  B41M3/14 ,  C09D11/033 ,  C09D11/037 ,  C09D11/322

CPC classification number: C09D11/101 ,  B41M3/14 ,  B41M3/144 ,  C09D11/033 ,  C09D11/037 ,  C09D11/322

Abstract: The present invention relates to the field of security inks suitable for printing machine readable security features on substrate, security documents or articles as well as machine readable security feature made from said security inks, and security documents comprising a machine readable security feature made from said security inks. In particular, the invention provides security inks comprising one or more IR absorbing materials selected from the group consisting of crystal water-free iron(II) orthophosphates of the general formula Fe3(PO4)2 and having a graftonite crystal structure, crystal water-free iron(II) metal orthophosphates, crystal water-free iron(II) metal phosphonates, crystal water-free iron(II) metal pyrophosphates, crystal water-free iron(II) metal metaphosphates of the general formula FeaMetb(POc)d, wherein said security ink is an oxidative drying security ink, a UV-Vis curable security ink, a UV-Vis curable security ink or a combination thereof.