Multilayer, sheet-like, photosensitive recording material for the production of printing plates

US5593811A · kind A · utility

Assignee

• Basf Lacke & Farben Aktiengesellschaft · DE

Inventors

• Thomas Loerzer · Bischofswerda, DE
• Stefan Wegener · Saulheim, DE
• Friedrich Goffing · Schifferstadt, DE

Key dates

• Filing date: Dec 21, 1995
• Grant date: Jan 14, 1997
• Expiry date: Dec 21, 2015

Classification

• Technology area (CPC G): Physics
• CPC primary: G03F7/11
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

(A) being a photosensitive relief-forming layer in which imagewise exposure to actinic light results in different solubilities of the exposed and unexposed parts, and this layer consists of a mixture of: PA1 (a1)one or more polymeric binders, PA1 (a2)one or more photopolymerization initiators, PA1 (a3)one or more organic compounds which are compatible with the binder (a1) and contain photopolymerizable olefinically unsaturated groups and, if required, PA1 (a4)one or more assistants, (B) being a smooth or dull, nontacky release layer (B) which is transparent to light, soluble or swellable in the relevant liquid media and formed by a polymer forming strong films and additives contained therein, and (C) being a cover sheet which can be detached from the release layer (B), the release layer (B) containing a metal salt as an additive, is suitable for the production of printing plates.