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:
Jul. 14, 1998
Filed:
Apr. 21, 1997
Ciba Specialty Chemicals Corporation, Tarrytown, NY (US);
Abstract
The present invention provides a compound having the formula: ##STR1## in which M is hydrogen, sodium, potassium, calcium, magnesium, ammonium, mono-, di-, tri- or tetra-C.sub.1 -C.sub.4 alkylammonium, mono-, di- or tri-C.sub.1 -C.sub.4 hydroxyalkylammonium or ammonium that is di- or tri-substituted by a mixture of C.sub.1 -C.sub.4 alkyl and C.sub.1 -C.sub.4 hydroxyalkyl groups; R.sub.1 is a group having the formula: ##STR2## in which M has its previous significance and n is 1 or 2; and R.sub.2 is O--C.sub.1 -C.sub.12 alkyl or N(R.sub.3)(R.sub.4) in which R.sub.3 and R.sub.4, independently, are hydrogen, C.sub.1 -C.sub.2 alkyl or C.sub.1 -C.sub.4 hydroxyalkyl, or R.sub.3 and R.sub.4, together with the nitrogen atom, are the atoms required to form a pyrrolidine, piperidine or morpholine group. The compounds of formula (1) are particularly useful as fluorescent whitening agents for cotton in discontinuous processes, in the course of which an acidic treatment, especially a finishing treatment using a polymer resin, occurs.