Agfa-gevaert

Agfa-gevaert Ag

Agfa Graphics Nv

Thorsten Lifka

Thomas Leichsenring

Hans-Joachim Schlosser

Mario Boxhorn

Andreas Elsaesser

Rudolf Zertani

Klaus-Peter Konrad

Sabine Kosack

Armin Pink

Klaus Peter Konrad

This present invention discloses a photopolymerisable mixture comprising a polymer binder, a radically photopolymerisable component containing at least one photooxidisable group, a polyethylene glycol di(meth)acrylate containing 2 or more ethylene glycol units, a photoreducible dye and a metallocene. This mixture can be used for preparing high-speed light-sensitive recording materials showing a particularly high resolution, especially for small negative types.

Photopolymerizable mixture and recording material prepared therewith

The invention relates to a pigment dispersion which contains at least one polymer containing polyvinyl alcohol, polyvinyl ether an/or polyvinyl acetal units and at least one polymer based on acrylate, wherein the weight ratio is generally 1:10 to 10:1, preferably 4:1 to 1:4. This dispersion is used in positive- or negative-working and reversible photosensitive mixtures for the preparation of recording materials.

Stable pigment dispersion and photosensitive recording material prepared therewith

The present invention relates to a photosensitive recording material comprising a base, a photopolymerisable layer and a covering layer containing a mixture of at least one water-soluble or at least water-dispersible polymer and at least one additive, the additive being selected from the group consisting of alkoxylated alkylenediamines, alkoxylated (C -C ) alkanols, phosphoric acid (C -C ) alkyl esters and phosphoric acid (C -C ) alkyl esters and the amount of the additive being in the range of 0.001 to 10.0% by weight, relative to the total weight of the non-volatile components of the covering layer. The present invention also relates to a process for preparing an offset printing plate with this recording material.

Photosensitive recording material provided with a covering layer

The invention relates to a developer concentrate which comprises water, at least one agent which is alkaline in water and an amphoteric surfactant and additionally at least one anionic surfactant, at least one complexing agent, at least one aminoalcohol and at least one N-alkoxylated mono- or polyfunctional amine. A ready-to-use developer can be prepared from this concentrate by dilution with tap water advantageously in the ratio of from 1:0.5 to 1:10, preferably in the ratio of from 1:2 to 1:6. The developer or the replenisher is preferably used in the production of printing plates.

Concentrate and aqueous developer produced therefrom for imagewise exposed recording materials

Growing community of inventors

Aarbergen, Germany

Thorsten Lifka