EP 1753915 B1 20071205 - SECURITY DEVICE WITH TEMPERATURE ACTIVABLE POLYMERIC LAYER
Title (en)
SECURITY DEVICE WITH TEMPERATURE ACTIVABLE POLYMERIC LAYER
Title (de)
SICHERHEITSVORRICHTUNG MIT TEMPERATURAKTIVIERBARER POLYMERSCHICHT
Title (fr)
DISPOSITIF DE SECURITE A COUCHE POLYMERE ACTIVABLE A UNE TEMPERATURE SPECIFIEE
Publication
Application
Priority
- GB 2005002283 W 20050609
- GB 0412981 A 20040610
Abstract (en)
[origin: WO2005121450A1] The present invention relates to improvements in security devices that can be used in varying shapes and sizes for authenticating or security applications. In particular, the invention refers to a durable security device (10) comprising a layer (12) that switches from opaque to transparent at a specified temperature. The security device (10) comprises an activatable layer (12) of polymeric material comprising a hard segment and crystallisable soft segment or at least one soft segment which is crosslinked and contains a crystallisable soft segment. The segments are selected to provide a predetermined activation temperature whereby the layer (12) is opaque at temperatures below the activation temperature and becomes transparent at temperatures above the activation temperature.
IPC 8 full level
D21H 21/42 (2006.01); B42D 15/00 (2006.01)
CPC (source: EP GB US)
B42D 25/29 (2014.10 - GB); B42D 25/355 (2014.10 - EP US); B42D 25/36 (2014.10 - US); D21H 21/42 (2013.01 - EP GB); D21H 21/48 (2013.01 - GB); G07D 7/003 (2017.05 - GB); B42D 2033/26 (2022.01 - EP)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2005121450 A1 20051222; AT E380268 T1 20071215; AU 2005252433 A1 20051222; DE 602005003666 D1 20080117; DE 602005003666 T2 20081113; EP 1753915 A1 20070221; EP 1753915 B1 20071205; ES 2297722 T3 20080501; GB 0412981 D0 20040714; GB 0511753 D0 20050720; GB 2414962 A 20051214; GB 2414962 B 20060517; PL 1753915 T3 20080530
DOCDB simple family (application)
GB 2005002283 W 20050609; AT 05750378 T 20050609; AU 2005252433 A 20050609; DE 602005003666 T 20050609; EP 05750378 A 20050609; ES 05750378 T 20050609; GB 0412981 A 20040610; GB 0511753 A 20050609; PL 05750378 T 20050609