The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 30, 1993
Filed:
Jan. 12, 1990
Peter Wilharm, Wiesbaden, DE;
Hans-Joachim Merrem, Seeheim-Jugenheim, DE;
Georg Pawlowski, Wiesbaden, DE;
Ralph Dammel, Mainz-Bretzenheim, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
A positively operating radiation-sensitive mixture comprising a binder which is insoluble in water but soluble or at least swellable in aqueous alkaline solution, and as a photoactive component a polyfunctional .alpha.-diazo-.beta.-keto ester of the general formula I ##STR1## in which R.sup.1 denotes an aliphatic, cycloaliphatic or araliphatic or aromatic radical having 4 to 20 carbon atoms, in which individual CH.sub.2 groups can be replaced by oxygen or sulfur atoms or by ##STR2## or NH groups and/or contain keto groups, X denotes an aliphatic, cycloaliphatic, carbocyclic, heterocyclic or araliphatic radical having 2 to 22 carbon atoms, in which individual CH.sub.2 groups can be replaced by oxygen or sulfur atoms or by the groups --NR.sup.2 --, --C(O)--O--, --C(O)--NR.sup.2 --, --C(O)-- ##STR3## --NR.sup.2 --C(O)--NR.sup.3 --, --O--C(O)--NR.sup.2 --, --C(O)-- ##STR4## or --O--C(O)--O--, or CH groups can be replaced by ##STR5## in which R.sup.2 and R.sup.3 independently of one another represent hydrogen or an aliphatic, carbocyclic or araliphatic radical,