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US 2006/0040210 A1Published application
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 Peiter, Matthias Schlorholz
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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.
Claims30
A reusable printing plate, comprising:
- a printing area;
- and
- a metal oxide surface treated with at least one fluorinated phosphonic acid on said printing area.
A process for the preparation of a fluorinated organic phosphonic acid, which comprises the following steps:
- a) coupling of an alkenyl halide selected from the group consisting of alkenyl bromide, alkenyl chloride, and alkenyl iodode with a monoalkyl phosphite, a dialkyl phosphite, or a trialkyl phosphate to give an alkyl alkenylphosphonate, the monoalkyl phosphite or dialkyl phosphite being deprotonated and the trialkyl phosphite being dealkylated;
- b) coupling of the alkyl alkenylphosphonate with an iodinated fluorohydrocarbon by reaction with an organic silver compound and/or a tin halide to give a fluorinated alkyl phosphonate;
- c) deiodination of the fluorinated alkyl phosphonate with the aid of an organic tin compound;
- d) substitution of the fluorinated alkyl phosphonate by reaction with a halogenated organic silicon compound to give a fluorinated alkylsilyl phosphonate;
- and
- e) alcoholysis of the fluorinated alkylsilyl phosphonate to give a fluorinated organic phosphonic acid.
3 more elements
Dependencies are inferred from the claim text.