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:
Jun. 20, 2006
Filed:
Jun. 20, 2002
Hiroshi Yamamoto, Nishinomiya, JP;
Norihisa Dan, Yawata, JP;
Olof Wallquist, Therwil, CH;
Ciba Specialty Chemicals Corporation, Tarrytown, NY (US);
Abstract
The present invention relates to fluorescent diketopyrrolopyrroles ('DPPs') of the formula characterized in that that at least two adjacent substituents Rto Rform an aromatic or aliphatic fused ring system, or at least one substituent Rto Ris cycloalkyl, aralkyl, alkenyl, cycloalkenyl, alkynyl, a hydroxyl group, a mercapto group, alkylthio, an aryl thioether group, a heterocyclic group, halogen, haloalkyl, haloalkenyl, haloalkynyl, a cyano group, an aldehyde group, a carbonyl group, a carboxyl group, an ester group, a carbamoyl group, a nitro group, a silyl group, a siloxanyl group, a substituted or unsubstituted vinyl, arylamino or diarylamino group; a process for their preparation and their use for the preparation of inks, colorants, pigmented plastics for coatings, non-impact-printing material, color filters, cosmetics, or for the preparation of polymeric ink particles, toners, dye lasers and electroluminescent devices. The fluorescent diketopyrrolopyrroles ('DPPs') of the formula I exhibit a high lighffastness, a high heat stability, especially in plastics. A luminescent device comprising a DPP compound of formula I is high in the efficiency of electrical energy utilisation, high in luminance and high in colour purity.