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:
Sep. 14, 1999
Filed:
Nov. 21, 1996
Allan Francis Cunningham, Marly, CH;
Martin Kunz, Efringen-Kirchen, DE;
Hisatoshi Kura, Takarazuka, JP;
Ciba Specialty Chemicals Corporation, Tarrytown, NY (US);
Abstract
Compounds of the formula I or I' ##STR1## in which R.sub.1 and R.sub.2 independently of one another, for example, are an aromatic hydrocarbon, with the proviso that the aromatic hydrocarbon radical is substituted in at least one o-position, or R.sub.1 and R.sub.2, for example, independently of one another are C.sub.1 -C.sub.20 alkyl, which is substituted by R.sub.9 R.sub.10 R.sub.11 Si; R.sub.2a is, for example, a divalent aromatic hydrocarbon radical; R.sub.3 is C.sub.1 -C.sub.20 alkyl which is substituted by R.sub.9 R.sub.10 R.sub.11 Si or is an aromatic hydrocarbon; R.sub.4 is, for example, C.sub.1 -C.sub.20 alkyl, C.sub.3 -C.sub.12 cycloalkyl or phenyl-C.sub.1 -C.sub.6 alkyl; E is R.sub.14 R.sub.15 R.sub.16 P or R.sub.8 R.sub.8a R.sub.7 N; R.sub.7, R.sub.8 and R.sub.8a and R.sub.9, R.sub.10 and R.sub.11 independently of one another are, for example, C.sub.1 -C.sub.12 alkyl; R.sub.14, R.sub.15 and R.sub.16 independently of one another are substituted phenyl and G is a radical which is able to form positive ions, with the proviso that, if R.sub.1, R.sub.2 and R.sub.3 are 2,4,6-trimethylphenyl, R.sub.4 is not C.sub.2 -C.sub.20 alkyl or C.sub.2 -C.sub.8 alkenyl, are suitable for use as particularly reactive photoinitiators.