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US 2008/0166157 A1Published application
Covering Layer for Electrophotographic Printing Rollers
AssigneeSensient Imaging Technologies GmbH
InventorsChristoph Roth, Regina Lischewski, Roland Ackermann, Wolfgang Witt
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Abstract
The invention relates to a novel covering layer for electrophotographic printing rollers with improved scratch resistance. Said covering layer consists of between 50 and 75 wt. % of cycloaliphatic epoxides, between 20 and 60 wt. % of aminofunctional silica nanoparticles, and between 0 and 2 wt. % of perfluoroalkyltrialkoxysilanes. The aminofunctional nanoparticles are produced from aminoalkyltrialkoxysilanes preferably by means of sol/gel technology.
Claims9
A covering layer for electrophotographic printing rollers, the covering layer comprising
- a) 50 to 75 wt.-% cycloaliphatic polyfunctional epoxide;
- b) 20 to 60 wt.-% amino-functional silica nanoparticles;
- and
- c) 0 to 2 wt.-% perfluoroalkyltrialkoxysilane.
1 more element
Dependencies are inferred from the claim text.