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:
Oct. 11, 2005
Filed:
Feb. 28, 2002
Athanassios Tzikas, Pratteln, CH;
Urs Lauk, Zürich, CH;
Romeo Dreier, Fehren, CH;
Antoine Clément, Basel, CH;
Athanassios Tzikas, Pratteln, CH;
Urs Lauk, Zürich, CH;
Romeo Dreier, Fehren, CH;
Antoine Clément, Basel, CH;
Ciba Specialty Chemicals Corporation, Tarrytown, NY (US);
Abstract
The present invention relates to pyrifone azo dyes of formula (1), wherein A is the radical of a diazo component of the benzene, naphthalene, diphenyl, azobenzene, thiophene, benzothiazole, benzoisothiazole, thiadiazole, indazole, benzotriazole, pyrazole, anthraquinone, naphttholic acid imide, chromone, phthalimide or diphenylene oxide series, Ris hydrogen, unsubstituted or hydroxyl- or phenyl-substituted C-Calkyl, it being possible for the alkyl chain to be interrupted from Cupwards by one or more oxygen atoms, or has the meanings of R, Ris a radical of formulae (2), (3), (4), (5), (6), or (7), wherein B is a bridging member, Ris alkyl or aryl, Rand Rare each independently of the other alkyl, aryl or heteroaryl and A is as defined for formula (1), or Rand Rtoghether with the nitrogen atom in NRRform a heterocyclic ring, Y is cyano, —CONHor CHSOH, and n is an integer from 2 to 6, to a process for their preparation and to their use in the production coloured plastics or polymeric color particles.