Recording material having a negative-working, radiation-sensitive layer which comprises additives for promoting developability
AssigneeAgfa-Gevaert
InventorsMichael Dörr, Andreas Elsässer
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Abstract
The invention relates to a recording material having a dimensionally stable, two-dimensional support, preferably an aluminium support, and a negative-working, radiation-sensitive layer which comprises a diazonium salt, a polymeric binder and a sulphobetaine. In addition, the layer may also comprise a polymerizable monomer or oligomer and a photopolymerization initiator. The front of the recording material may be matted or pigmented, and the back may be coated with an organic polymeric material. The sulphobetaine improves the solubility of the diazonium salts in aqueous-alkaline developers without reducing the resistance of the offset printing plates produced from the recording material.
Claims19
A recording material which comprises a support and a negative-working, radiation-sensitive layer which comprises a diazonium salt and a polymeric binder, the radiation-sensitive layer comprises a sulphobetaine, wherein the sulphobetaine is of the formula I:
- in which
- R1 to R3 are identical or different and are substituted or unsubstituted and/or mono- or polyunsaturated, acyclic or isocyclic hydrocarbon radicals having from 1 to 16 carbon atoms, in which one or more methylene groups is optionally replaced by
- —O—, —S—, —NH—, —CO—NH— and/or —O—CO—NH—groups, and, in the case of the acyclic radicals, each two thereof is optionally linked to one another to form a saturated or unsaturated ring, and
- R4 is a substituted or unsubstituted (C1-C6)alkanediyl group.
A recording material which comprises support and a negative-working, radiation-sensitive layer which comprises a diazonium salt and a polymeric binder, the radiation-sensitive layer comprises a sulphobetaine as surfactant.
Dependencies are inferred from the claim text.