PROTECTIVE COATINGS FOR SECURITY DOCUMENTS

摘要

The present invention relates to the field of the protection of security documents, in particular banknotes, against premature detrimental influence of soil and/or moisture upon use and time. In particular, it relates radiation curable protective varnishes comprising one or more cationically curable compounds and one or more di-hydroxyl-terminated perfluoropolyether compounds of the general formula HO—(CH2CH2O)c—CH2—CF2O—(CF2—CF2O)a—(CF2O)b—CF2—CH2—(OCH2CH2)d—OH, wherein a and b independently are integers in a range between 0 and 50, wherein a+b≧1, and wherein c and d may be the same or different and are in the range of 1-20, and their uses for providing a protective coating or layer on a security document.

主权项

1. A radiation curable protective varnish comprising one or more cationically curable compounds and one or more di-hydroxyl-terminated perfluoropolyether compounds of the general formula HO—(CH2CH2O)c—CH2—CF2O—(CF2—CF2—O)a—(CF2O)b—CF2—CH2—(OCH2CH2)d—OH
wherein a and b independently are integers in a range between 0 and 50 and wherein a+b≧1, and wherein c and d may be the same or different and are in the range of 1-20.