North Carolina State University

Burroughs Wellcome Co.

Hbi Branded Apparel Enterprises, LLC Corporation

Cotton, Inc.

Harold S Freeman

David Hinks

Abraham Reife

Jolanta Sokolowska-Gajda

John D McDermed

Matthew J Farrell

Anjaneyulu S Tadepalli

Vincent H Chang

Kevin P Hurley

Guan Wang

Keith Zimmerman

Malgorzata Szymczyk

Xiuzhu Fei

Jolanta Sokolawska-Gajda

Functionalizing a fibrous material having a plurality of hydroxyl groups includes reacting the fibrous material with a compound of Formula I: where X is a monovalent counteranion for the quaternary ammonium cation of Formula I and Hal is a halogen atom, to obtain the functionalized fibrous material. Also provided is a functionalized fibrous material prepared by any one of the methods described herein (e.g., a functionalized fiber including a moiety of Formula II: having an odor of free amine below the threshold of detection, or having an odor of free amine with degree of offensiveness of about 3 or less. The functionalized fibrous material may be dyed, and articles of clothing may be made from the dyed functionalized fibrous material.

Functionalized fibrous material

The disclosure relates to a method for decolorization of a dye-colored synthetic polymer, which includes the steps of treating a dye-colored synthetic polymer, such as polyester, with a treatment composition at pH 6 or less, the treatment composition comprising sodium formaldehyde sulfoxylate, water, and a ketone. The resulting decolorized synthetic polymer is then separated from the treatment composition.

Method for decolorizing textile materials

Nonmutagenic, highly twisted derivatives of benzidine of the following formula ##STR1## useful as intermediates for the preparation of various organic pigments were obtained. The benzidine derivatives are significantly rotated about the biphenyl linkage due to bulky substituents at the R.sub.2 and/or R.sub.4 positions. Bisazomethine, disaoacetoacetanilide, disazopyrazolone, disazobenzimidazolone and disazonaphthol pigments prepared from these highly twisted benzidines exhibit hypsochromic spectral shifts relative to pigments prepared from other benzidine compounds with less twist about the biphenyl linkage, for instance, other benzidine compounds in which all four R.sub.2 and R.sub.4 represent H. Greenish-yellow, yellow, orange, red and brown pigments obtained from the twisted benzidines are nonmutagenic in the standard Ames test and Prival modification.

Organic pigments from twisted benzidines

A family of 1:2 Fe-complexed formazan dyes is described. The dyes unexpectedly afford reddish-violet, violet, blue and black shades on natural and synthetic substrates. Methods for synthesizing the dyes and for dyeing a substrate are described. The dyes represent environmentally friendly alternatives to conventional Cr- and Co-based azo and formazan dyes.

Iron-complexed formazan dyes for polyamide and protein substrates

Disclosed is an original approach to solving the environmental problem associated with the use of Cr-based metallized azo dyes to deliver black shades on natural and synthetic substrates. This invention affords methods for both the synthesis of metallized dyes and the generation of black dyeings using those dyes without employing metals designated as priority pollutants at any stage in either method. The key element of the disclosure is the use of black 1:2 Fe complexes of azo dyes in lieu of currently used Cr-based complexes which are based on environmentally unfriendly priority pollutant metals without compromising the desirable high fastness properties of the latter complexes, an accomplishment heretofore assumed unachievable.

Environmentally friendly method for producing lightfast black shades on

The present invention is concerned with compounds of formula (I) ##STR1## wherein R.sup.1 is hydrogen or C.sub.1-4 alkoxy;

Anti-hypertensive sulfonanilides

A method of producing a UV lightfast disperse dyestuff comprising selecting a disperse dyestuff having predetermined chromophoric groups, selecting a photostabilizer compound, designing a hybrid disperse dye molecular structure which contains the chromophoric groups of the selected disperse dyestuff and also contains the molecular structural features of the selected photostabilizer compound, and synthesizing the thus designed hybrid disperse dyestuff molecule. Such a method produces a hybrid dye molecule which is a UV lightfast analog of a disperse dyestuff having predetermined chromophoric groups, said hybrid dye molecule containing in its molecular structure the chromophoric groups of the selected disperse dyestuff and also containing the molecular structural features of a photostabilizer compound.

Growing community of inventors

Raleigh, NC, United States of America

Harold S Freeman