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1. (WO2018036652) SECURITY ELEMENT, METHOD FOR PRODUCING THE SAME AND DOCUMENT OF VALUE

Pub. No.:    WO/2018/036652    International Application No.:    PCT/EP2017/001003
Publication Date: Fri Mar 02 00:59:59 CET 2018 International Filing Date: Wed Aug 23 01:59:59 CEST 2017
IPC: B42D 25/36
Applicants: GIESECKE+DEVRIENT CURRENCY TECHNOLOGY GMBH
Inventors: KECHT, Johann
SCHLOSSBAUER, Axel
STEINLEIN, Stephan
Title: SECURITY ELEMENT, METHOD FOR PRODUCING THE SAME AND DOCUMENT OF VALUE
Abstract:
The invention relates to a security element for enhancing the security of documents of value, comprising a first polymer, which contains a feature substance and is at least partially surrounded by a second polymer, wherein the first polymer is a hydrophobic, water-insoluble polymer, which can be converted into a hydrophilic, water-soluble polymer if the pH is increased and the ambient temperature is increased for a treatment period of less than 60 minutes, preferably less than 30 minutes, and the second polymer is a hydrophilic, water-soluble polymer, wherein the increased pH is greater than 12, preferably greater than 10, and the increased ambient temperature is greater than 90°C, preferably greater than 60°C.