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:
May. 19, 1987
Filed:
Aug. 20, 1984
Ruediger Iden, Speyer, DE;
Guenther Seybold, Neuhofen, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
Light is concentrated in plastic sheets by a method in which the fluorescent centers used are perylenetetracarboxylic acid diimides of the formula ##STR1## The compounds (I) are prepared by chlorinating (I) in which n is 0 with sulfuryl chloride in an inert organic liquid in the presence of a catalyst. In the formula, n is 2, 3, 4 or 5 or 6, and R and R.sup.1 independently of one another are each (a) straight-chain or branched C.sub.1 -C.sub.18 -alkyl which is unsubstituted or substituted by cyano, hydroxyl, cycloalkyl, alkylcarbonyloxy, alkenylcarbonyl-oxy or cycloalkylcarbonyloxy and in which the alkyl chain may furthermore be interrupted by O or S, or (b) C.sub.5 -C.sub.18 -cycloalkyl which is unsubstituted or substituted by alkyl, carboalkoxy or trifluoromethyl. Novel perylenetetracarboxylic acid diimides of the formula I, where n is 4 and R and R.sup.1 are each 3-(2'-ethylhexyloxy)-propyl, 2-ethylhexyl, butyl, octyl, tridecyl, octadecyl, pinan-3-ylmethyl, 6-(2'-ethylhexanoyloxy)-6-methylhept-2-yl, 4-methylcyclohexyl, 3,5-dimethylcyclohexyl, 2,6-dimethylcyclohexyl, 2,6-diisopropylcyclohexyl or norbornyl, or R is C.sub.4 -C.sub.12 -alkyl, C.sub.1 -C.sub.4 -alkyl-substituted cyclohexyl or cyclohexyl-C.sub.1 - or C.sub.2 -alkyl, and R.sup.1 is 2-hydroxyethyl, C.sub.1 -C.sub.19 -alkylcarbonyloxy-C.sub.2 -C.sub.4 -alkyl, C.sub.6 -C.sub.12 -cycloalkylcarbonyloxy-C.sub.2 -C.sub.4 -alkyl or C.sub.2 -C.sub.4 -alkenylcarbonyloxy-C.sub.2 -C.sub.4 -alkyl. The dyes (I) give lightfast fluorescent colorations in plastics.