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.