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US 7,485,397 B2Granted
Reusable printing plate, printing press and printing unit having the printing plate, process for imaging the printing plate and process for preparation of a fluorinated organic phosphonic acid
AssigneeHeidelberger Druckmaschinen AG
InventorsWolfgang Eck, Martin Gutfleisch, Gerhard Daniel Peiter, Matthias Schlörholz
Life of this patent
Estimating the term…
Abstract
A reusable printing plate, in particular for use both in wet offset printing and in dry offset printing, includes a printing area and a metal oxide surface treated with at least one fluorinated phosphonic acid. A printing press and a printing unit having the printing plate, a process for imaging the printing plate and a process for preparation of a fluorinated organic phosphonic acid are also provided.
Claims9
A reusable dry offset printing plate, comprising:
- a dry offset printing area;
- and
- a metal oxide surface made hydrophobic with at least one fluorinated phosphonic acid on said printing area;
- said fluorinated phosphonic acid being selected from the group consisting of:
- a fluorinated alkylphosphonic acid,
- a semiperfluorinated alkylphosphonic acid,
- a partly aromatic acid, and
- a fluorinated phosphonic acid having single or multiple branches in the alkyl chain and a number of carbon atoms being greater than or equal to 8 and less than or equal to 30.
5 more elements
A reusable wet offset printing plate, comprising:
- a wet offset printing area;
- and
- a metal oxide surface made hydrophobic with at least one fluorinated phosphonic acid on said printing area;
- said fluorinated phosphonic acid being a partly aromatic acid.
1 more element
Dependencies are inferred from the claim text.