Sulfur Dye (sulfur-organic Reaction Product Dye) Patents (Class 8/652)
  • Patent number: 12000068
    Abstract: A woven textile fabric, the fabric including: a warp yarn with a yarn count of 20 s to 60 s including a blend of a cotton, a recycled cotton and a recycled polyester; and a weft yarn with a yarn count of 20 s to 60 s including a blend of a cotton, a recycled cotton and a recycled polyester, wherein the total content of the recycled cotton in the fabric is at least about 15%, further wherein the fabric exhibits rating of 3 or above when the fabric is tested for pilling after 1000 rubs. The advantageous fabric realized in accordance with embodiments of the present disclosure has excellent wrinkle resistance, high tensile strength, and low pilling.
    Type: Grant
    Filed: November 25, 2022
    Date of Patent: June 4, 2024
    Inventor: Sachin Jhunjhunwala
  • Publication number: 20140290746
    Abstract: A photoelectric conversion element, having: an electrically-conductive support; a photoconductor layer having a semiconductor fine-particle layer adsorbed a dye; a charge transfer layer containing an electrolyte; and a counter electrode; which are provided on one side of the support in this order, in which the dye has at least one terdentate ligand having at least one acidic group; at least one ligand coordinating to a metal atom M has an sp2 carbon atom; a cyclic group binds to the sp2 carbon atom; a specific substituent R is substituted at an atom of ?- or ?-position to the atom of the cyclic group directly binding to the sp2 carbon atom; and with the metal atom M, an atom G1 of the ?- or ?-position, and an atom G2 of the substituent R, an angle ? (?ZMG1G2) is 150° or less.
    Type: Application
    Filed: June 11, 2014
    Publication date: October 2, 2014
    Applicant: FUJIFILM Corporation
    Inventors: Yukio TANI, Katsumi KOBAYASHI, Kimiatsu NOMURA
  • Patent number: 8740997
    Abstract: Novel compounds based on diaminostilbene are provided. The compounds conform to the general structures The compounds are useful as optical brighteners. Compositions, such as laundry compositions, containing such compounds are also provided.
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: June 3, 2014
    Assignee: Milliken & Company
    Inventors: Robert L. Mahaffey, Eduardo Torres, Dominick J. Valenti, Patrick D. Moore, Leland G. Close, Jr.
  • Publication number: 20130330992
    Abstract: Denim fabric, suitable for use as apparel, and garments made therefrom, wherein the denim fabric is made from at least about 50 wt % fibers produced from post-consumer recycled polyester and recycled cotton. In particular, warp yarns are made of recycled cotton and the other cotton, and the filling yarns are made of the post-consumer recycled polyester and spandex material. The warp yarn may be plied with like reclaimed warp yarn, and/or with virgin fiber warp yarn. The warp and filling yarns are combined to make the denim fabric. The denim fabric produced has strength and related properties sufficient for consumer use. The fabric or garment may also be subjected to washing, handwork, and/or other finishing effects that would change the look and feel of the fabric or add special characteristics.
    Type: Application
    Filed: June 11, 2012
    Publication date: December 12, 2013
    Applicants: Pomerantz/Bernard, LLC, Mount Vernon Mills, Inc.
    Inventors: David Mitchell, Dale McColllum, Bruce Pomerantz, Dan Bernard
  • Patent number: 8523957
    Abstract: A process for using reduced vat dyes in a continuous dyeing process for production of dyed yarns and fabrics of different colors. In the process, dye composition is introduced to a treatment unit for reduction to desired dye composition. The dye concentration in the treatment unit is lower than feeding dye concentration so that dye precipitation does not occur, but significantly higher than the circulating dye concentration so that the dye is reduced efficiently. Although the preferred location for the treatment unit is before the circulation line, it may be at any location before the dip-dye tank.
    Type: Grant
    Filed: August 9, 2005
    Date of Patent: September 3, 2013
    Assignee: SANKO Tekstil Isletmeleri San. ve Tic. A.S.
    Inventors: Erol Arioglu, Agamirze Hamitbeyli, Kenan Loyan, Mustafa Esref Tuncer, Hamit Yenici
  • Publication number: 20130167308
    Abstract: The invention provides a method of printing a textile comprising polyester, or a full-chrome, semi-chrome or vegetable-tanned leather, with a vat or a sulfur dye, comprising inkjet printing a solubilised vat dye or a solubilised sulfur dye onto the textile or the leather.
    Type: Application
    Filed: June 20, 2011
    Publication date: July 4, 2013
    Applicant: Heriot-Watt University
    Inventors: Roger H. Wardman, Robert M. Christie, Shah Mohammed Reduwan Billah
  • Patent number: 8454711
    Abstract: Novel compounds based on diaminostilbene are provided. The compounds conform to the general structures The compounds are useful as optical brighteners. Compositions, such as laundry compositions, containing such compounds are also provided.
    Type: Grant
    Filed: September 4, 2012
    Date of Patent: June 4, 2013
    Assignee: Milliken & Company
    Inventors: Robert L. Mahaffey, Eduardo Torres, Dominick J. Valenti, Patrick D. Moore, Leland G. Close
  • Patent number: 8262744
    Abstract: Novel compounds based on diaminostilbene are provided. The compounds conform to the general structures The compounds are useful as optical brighteners. Compositions, such as laundry compositions, containing such compounds are also provided.
    Type: Grant
    Filed: May 18, 2011
    Date of Patent: September 11, 2012
    Assignee: Milliken & Company
    Inventors: Robert L. Mahaffey, Eduardo Torres, Dominick J. Valenti, Patrick D. Moore, Leland G. Close, Jr.
  • Patent number: 8262743
    Abstract: Novel compounds based on distyryl-biphenyl are provided. The compounds conform to the general structure The compounds are useful as optical brighteners. Compositions, such as laundry care compositions, containing such compounds are also provided.
    Type: Grant
    Filed: May 18, 2011
    Date of Patent: September 11, 2012
    Assignee: Milliken & Company
    Inventors: Eduardo Torres, Robert L. Mahaffey, Dominick J. Valenti, Patrick D. Moore, Leland G. Close, Jr.
  • Patent number: 8123850
    Abstract: A hybrid pigment composition is provided including a pigment or a dye and a fibrous clay. The pigment composition has higher reflectance in a near infrared region than a visible light region of the electromagnetic spectrum. The fibrous clay can be selected from palygorskite, sepiolite, and mixtures thereof. The hybrid pigment composition is tunable to provide high reflectance at a desired wavelength in the near infrared region.
    Type: Grant
    Filed: March 10, 2009
    Date of Patent: February 28, 2012
    Assignee: Mayan Pigments, Inc.
    Inventor: Lori Niewold
  • Patent number: 7780743
    Abstract: The invention relates to the dyeing of keratin materials using naphthylimide thiol/disulphide thiol fluorescent dyes, and to a dyeing process which has a lightening effect on keratin materials, in particular keratin fibres, especially human keratin fibres such as the hair, using said composition. It similarly relates to novel thiol/disulphide fluorescent dyes and to uses thereof in lightening keratin materials. This composition makes it possible to obtain a particularly resistant and visible lightening effect on dark keratin fibres.
    Type: Grant
    Filed: March 23, 2007
    Date of Patent: August 24, 2010
    Assignee: L'Oreal S.A.
    Inventors: Andrew Greaves, Nicolas Daubresse
  • Publication number: 20100151184
    Abstract: The present invention provides compositions for treating textiles, including carpet and other floor coverings. Compositions of the present invention, in some embodiments, can impart flame resistant and/or stain resistant properties to fibers, including synthetic fibers comprising polyolefins, polyamides, and polyesters such as polytrimethylene terephthalate.
    Type: Application
    Filed: November 16, 2009
    Publication date: June 17, 2010
    Inventors: Michael Grigat, Ralph R. Sargent, Michael S. Williams
  • Patent number: 7686850
    Abstract: Disclosed are nitro-sulfide dyes of formula (1), their salts, isomers, hydrates and other solvates, wherein R1, R2, R3, independently from each other are hydrogen; C1-C20alkyl or C1-C20alkoxy, which may be substituted by one or more C1-C5alkoxy, halogen, —NH2, mono-C1-C5alkylamino, di-C1-C5alkylamino, —NO2 or hydroxy; C3-C6cycloalkyl; —C(O)H; —C(O)—C1-C5alkyl; —C(O)OH; —C(O)O—C1-C5alkyl; halogen; NO2; OH; SH; phenyl, which may be substituted by one or more C1-C5alkyl, C1-C5alkoxy, halogen, —NH2, mono-C1-C5alkylamino, di-C1-C5alkylamino, —NO2 or hydroxy; or a radical of formula (1a) —NR4R5, wherein R4 and R5 independently from each other are hydrogen; C1-C12alkyl, which may be substituted by one or more C1-C5alkyl, C1-C5-alkoxy, hydroxy or —(CO)—H; —(CO)—C1-C5alkyl; phenyl or phenyl-C1-C4alkyl, wherein the phenyl moiety may be substituted by one or more C1-C5alkyl, C1-C5alkoxy, halogen, —NH2, mono-C1-C5alkylamino, di-C1-C5alkylamino, —NO2, carboxy or hydroxy; or a radical of formula (2); wherein at least one o
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: March 30, 2010
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Christian Cremer, Olof Wallquist
  • Publication number: 20090191325
    Abstract: The invention provides a surface active ingredient composition, which includes a base liquid including water which has dispersed therein in percentages by volume: Sodium Chloride 1 to 3% Magnesium 1 to 2% Calcium 1 to 2% Potassium 1 to 2% Sulphate 1 to 2% Carbon 0.5 to 1% Nitrate 1 to 2% and Phosphate 1 to 2% sodium chloride dissolved in the base liquid; and sodium alkyl ether sulphate dissolved in the base liquid, with the portion of the base liquid to sodium chloride and sodium alkyl ether sulphate being between 1:1:1.5 and 1:1:5. The invention further provides a process for producing same and uses thereof.
    Type: Application
    Filed: May 28, 2007
    Publication date: July 30, 2009
    Applicant: MARINE 3 TECHNOLOGIES H0LDINGS (PTY) LTD. SUITE8, PANAORAMA OFFICE ESTATE
    Inventor: Andries Du Plessis
  • Patent number: 7559959
    Abstract: Compounds of the general formula (I) a process for their preparation and their use for dyeing and/or printing organic substrates.
    Type: Grant
    Filed: May 12, 2005
    Date of Patent: July 14, 2009
    Assignee: Clariant Finance (BVI) Limited
    Inventors: Georg Schoefberger, Ulrich Geiger
  • Patent number: 7550016
    Abstract: Disclosed are compounds of formula.
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: June 23, 2009
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Christian Cremer, Olof Wallquist
  • Patent number: 7235110
    Abstract: A method for surface dyeing a range of textile materials, in the form of yarn, fabric, or garments, includes: a) preparing a dyebath including dye particles and an additive, such as an anionic acrylic copolymer, causing the particles to become charged; b) preparing the textile material by applying an additive, such as a cationic polyamide, forming a substrate with a charge attracting the particles, c) immersing the textile material in the dyebath; d) chemically reducing the dye particles retained on the textile material to a leuco form; and e) oxidizing the dye material.
    Type: Grant
    Filed: November 14, 2005
    Date of Patent: June 26, 2007
    Inventor: Melvin Alpert
  • Patent number: 7101407
    Abstract: The present invention relates to sulfur dye protection systems and compositions and methods employing same, as well as processes for making sulfur dyes, especially bleach stable sulfur dyes, processes for dying textiles with sulfur dyes and textiles dyed by such processes. More particularly, the present invention relates to modifying existing dyes and/or making newly formed sulfur dyes. Even more particularly, the present invention relates to materials that can chemically or physically interact with sulfur dyes to protect the sulfur dyes from oxidation by oxidizing agents, such as bleaching agents.
    Type: Grant
    Filed: February 13, 2003
    Date of Patent: September 5, 2006
    Assignee: The Board of Regents of the University of Nebraska
    Inventor: Jiping Wang
  • Patent number: 7018424
    Abstract: The present invention relates to sulfur dye protection systems and compositions and methods employing same, as well as processes for making sulfur dyes, especially bleach stable sulfur dyes, processes for dying textiles with sulfur dyes and textiles dyed by such processes. More particularly, the present invention relates to modifying existing dyes and/or making newly formed sulfur dyes. Even more particularly, the present invention relates to materials that can chemically or physically interact with sulfur dyes to protect the sulfur dyes from oxidation by oxidizing agents, such as bleaching agents.
    Type: Grant
    Filed: February 13, 2003
    Date of Patent: March 28, 2006
    Assignee: The Board of Regents of The University of Nebraska
    Inventor: Jiping Wang
  • Patent number: 6916348
    Abstract: Tanned leather is (a) pretreated in an aqueous and alkaline medium either with ammonia, primary amines or a mixture of ammonia and primary amines and then with a polyfunctional organic compound containing at least one aldehyde group as a functional group, or (b) in an aqueous and acidic medium with a polyfunctional organic compound and then ammonia, primary amines or a mixture of ammonia and primary amines, and (c) then dyed in an aqueous and alkaline medium with a water-soluble dye containing at least one functional group which is capable of reacting with one of the functional groups of the organic compound, forming a covalent bond. A tanned and dyed leather is obtainable with a high color intensity, outstanding wet fastness and excellent grain tightness, wherein the dye is permanently and covalently bonded to the leather via a bridging group, preferably in the region of the surface, and the bridging group is essentially bonded to the leather via —N?CH— groups.
    Type: Grant
    Filed: August 27, 2001
    Date of Patent: July 12, 2005
    Assignee: TFL Ledertechnik GmbH
    Inventors: Jens Fennen, Campbell Thomas Page, Jon Louis McHugh
  • Patent number: 6846334
    Abstract: The present invention relates to sulfur dye protection systems and compositions and methods employing same, as well as processes for making sulfur dyes, especially bleach stable sulfur dyes, processes for dying textiles with sulfur dyes and textiles dyed by such processes. More particularly, the present invention relates to modifying existing dyes and/or making newly formed sulfur dyes. Even more particularly, the present invention relates to materials that can chemically or physically interact with sulfur dyes to protect the sulfur dyes from oxidation by oxidizing agents, such as bleaching agents.
    Type: Grant
    Filed: February 13, 2003
    Date of Patent: January 25, 2005
    Assignee: The Board of Regents of the University of Nebraska
    Inventor: Jiping Wang
  • Patent number: 6814763
    Abstract: Mediator systems obtainable by mixing one or more salts of a metal capable of forming a plurality of valence states with at least one amino-containing complexing agent (K1) and at least one hydroxyl-containing but amino-devoid complexing agent (K2) in an alkaline aqueous medium, wherefor the complexing agents may be present as salts and the molar ratio of K1 to metal ion is from 0.1:1 to 10:1 and the molar ratio of K2 to metal ion is from 0.1:1 to 5:1 are useful for dyeing cellulosic textile material.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: November 9, 2004
    Assignee: DyStar Textilfarben GmbH & Co. Deutschland KG
    Inventors: Thomas Bechtold, Stefan Mohr, Wolfgang Schrott, Norbert Grund, Wolfgang Hiebsch
  • Patent number: 6790241
    Abstract: Mediator systems obtainable by mixing a salt of an electrochemically active complexing metal (M1) capable of forming a plurality of valence states with a hydroxyl-containing complexing agent, which may likewise be present as salt, and with a salt of an electrochemically inactive complexing metal (M2) in an alkaline aqueous medium, wherefor the molar ratio of metal ion M2 to metal ion M1 is from 0.8:1 to 2:1 are useful for reducing dyes and dyeing cellulosic textile material.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: September 14, 2004
    Assignee: DyStar Textilfarben GmbH & Co. Deutschland KG
    Inventors: Thomas Bechtold, Eduard Burtscher, Wolfgang Schrott, Norbert Grund, Peter Maier, Georg Schnitzer, Franz Sütsch
  • Patent number: 6302925
    Abstract: A process for dyeing fibrous substrates which comprises the steps of: providing a fibrous substrate; providing at least one sulfur dye; providing at least one reduction stable direct dye; and applying said reduction stable direct dye and sulfur dye to said fibrous substrate in the presence of a suitable reducing agent. Further, it has been surprising to find that these reduction stable direct dyes can be processed without a sulfur dye present. This results in a process for dyeing fibrous substrates which comprises the steps of: providing a fibrous substrate; providing a reduction stable direct dye; and applying said reduction stable direct dye to said fibrous substrate in the presence of a suitable reducing agent.
    Type: Grant
    Filed: November 22, 1999
    Date of Patent: October 16, 2001
    Assignee: Clariant Finance (BVI) Limited
    Inventors: J. Michael Hipp, Mark S. Carlough, William T. Sherrill, Peter Stahala
  • Patent number: 6287349
    Abstract: A process for dyeing fibrous substrates which comprises the steps of: providing a fibrous substrate; providing at least one sulfur dye; providing at least one reduction stable direct dye; and applying said reduction stable direct dye and sulfur dye to said fibrous substrate in the presence of a suitable reducing agent. Further, it has been surprising to find that these reduction stable direct dyes can be processed without a sulfur dye present. This results in a process for dyeing fibrous substrates which comprises the steps of: providing a fibrous substrate; providing a reduction stable direct dye; and applying said reduction stable direct dye to said fibrous substrate in the presence of a suitable reducing agent.
    Type: Grant
    Filed: November 22, 1999
    Date of Patent: September 11, 2001
    Assignee: Clariant Finance (BVI) Limited
    Inventors: J. Michael Hipp, Mark S. Carlough, William T. Sherrill, Peter Stahala
  • Patent number: 6129769
    Abstract: The present invention relates to methods for dyeing a material, comprising (a) treating the material with a dyeing system which comprises one or more reduced vat dyes and/or one or more reduced sulfur dyes; and (b) oxidizing the one or more reduced vat dyes or one or more reduced sulfur dyes adsorbed onto the treated material with an oxidation system comprising (i) an oxygen source and one or more enzymes exhibiting oxidase activity or (ii) a hydrogen peroxide source and one or more enzymes exhibiting peroxidase activity, to convert the one or more reduced dyes to their original oxidized insoluble colored forms; wherein the material is a fabric, yarn, fiber, garment or film made of cotton, diacetate, flax, fur, hide, leather, linen, lyocel, polyacrylic, polyamide, polyester, ramie, rayon, silk, tencel, triacetate, viscose or wool.
    Type: Grant
    Filed: August 24, 1999
    Date of Patent: October 10, 2000
    Assignee: Novo Nordisk Biotech, Inc.
    Inventors: Feng Xu, Sonja Salmon, Heinz-Josef Wilhelm Deussen, Henrik Lund
  • Patent number: 6093221
    Abstract: This invention concerns a process for reducing dyes of the group consisting of sulfur and vat dyes. The reduction is carried out in an aqueous alkali medium using isomaltulose or a mixture containing isomaltulose as the reducing agent.
    Type: Grant
    Filed: July 22, 1999
    Date of Patent: July 25, 2000
    Assignee: Sudzucker Aktiengesellschaft
    Inventors: Dietmar R. Grull, Alireza Haji Begli, Nikolai Kubadinow, Markwart Kunz, Mohammad Munir
  • Patent number: 6019800
    Abstract: A process for dyeing fibrous substrates which comprises the steps of: providing a fibrous substrate; providing at least one sulfur dye; providing at least one reduction stable direct dye; and applying said reduction stable direct dye and sulfur dye to said fibrous substrate in the presence of a suitable reducing agent. Further, it has been surprising to find that these reduction stable direct dyes can be processed without a sulfur dye present. This results in a process for dyeing fibrous substrates which comprises the steps of: providing a fibrous substrate; providing a reduction stable direct dye; and applying said reduction stable direct dye to said fibrous substrate in the presence of a suitable reducing agent.
    Type: Grant
    Filed: December 17, 1998
    Date of Patent: February 1, 2000
    Assignee: Clariant Finance (BVI) Limited
    Inventors: J. Michael Hipp, Mark S. Carlough, William T. Sherrill, Peter Stahala
  • Patent number: 5964899
    Abstract: Azo dyes containing sulphur dye entities as a constitutional component are dyes of valuable properties, in particular for the dyeing of leather.
    Type: Grant
    Filed: October 8, 1997
    Date of Patent: October 12, 1999
    Assignee: Clariant Finance (BVI) Limited
    Inventors: Jordi Berenguer, Manuel Jose Domingo, Jose Rocas
  • Patent number: 5961670
    Abstract: New sulfur dyes comprising in their preparation at least one sulfur dye intermediate of the formula I ##STR1## wherein R and R.sub.1 are independently nitro, nitroso or amino, are produced by including in their preparation at least one modifying agent selected from the group of: A) an aldehyde; B) urea; C) a benzoquinone or naphthoquinone; and D) monoethanolamine or by treating an already prepared sulfur dye involving such an intermediate in its preparation, with at least one aldehyde, benzoquinone or naphthoquinone or with monoethanolamine.
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: October 5, 1999
    Assignee: Clariant Finance (BVI) Limited
    Inventors: Philip N. Cote, Xiangfu Lan, Alex I. Shakhnovich, Manuel Jose Domingo
  • Patent number: 5948122
    Abstract: The present invention relates to methods for dyeing a material, comprising (a) treating the material with a dyeing system which comprises one or more reduced vat dyes and/or one or more reduced sulfur dyes; and (b) oxidizing the one or more reduced vat dyes or one or more reduced sulfur dyes adsorbed onto the treated material with an oxidation system comprising (i) an oxygen source and one or more enzymes exhibiting oxidase activity or (ii) a hydrogen peroxide source and one or more enzymes exhibiting peroxidase activity, to convert the one or more reduced dyes to their original oxidized insoluble colored forms; wherein the material is a fabric, yarn, fiber, garment or film made of cotton, diacetate, flax, fur, hide, leather, linen, lyocel, polyacrylic, polyamide, polyester, ramie, rayon, silk, tencel, triacetate, viscose or wool.
    Type: Grant
    Filed: November 24, 1998
    Date of Patent: September 7, 1999
    Assignees: Novo Nordisk Biotech, Inc., Novo Nordisk BioChem North America Inc., Novo Nordisk A/S
    Inventors: Feng Xu, Sonja Irene Salmon
  • Patent number: 5922087
    Abstract: Stable, pourable aqueous suspensions of solid particulate materials are provided, especially suspensions of sulfur dyes which are characterized a very low content of inorganic sulfides and inorganic polysulfides. The suspensions are produced using certain suspension stabilizing agents, particularly polysaccharides, such as xanthan gum, whose solutions in water are pseudoplastic. The suspensions may further comprise a non-sulfide reducing agent. An improved method is also provided for determining the the potential for such suspensions to release hydrogen sulfide upon being acidified at a given temperature, which method comprises acidifying a sample of the suspension to pH 2.9-3.7, capturing all of the hydrogen sulfide released during acidification in aqueous alkali and measuring the sulfide ion content of the aqueous alkali.
    Type: Grant
    Filed: September 9, 1996
    Date of Patent: July 13, 1999
    Assignee: Clariant Finance (BVI) Limited
    Inventors: Masato Nishioka, Michel M. Trawalter, Catherine S. Ho, Livius T. Percy, May N. Szeto, Yi Lai Wang, Guido J. Danhieux, Jon W. Merkert, Dwayne R. Myers
  • Patent number: 5922085
    Abstract: A process of preparing a dye composition and a resultant dye composition. The process includes preparing a mixture comprising a triphenylmethane dye and oxidation products by reacting methylenedianiline, aniline, an oxidation catalyst, and an oxidant; separating the oxidation products from the triphenylmethane dye to produce an aqueous solution of oxidation products; treating the solution of oxidation products with a basic compound; separating unreacted aniline from the solution of oxidation products and forming a mixture of oxidation products; and sulfonating the mixture of oxidation products to form a dye composition.
    Type: Grant
    Filed: September 30, 1997
    Date of Patent: July 13, 1999
    Assignee: BASF Corporation
    Inventors: Gray D. Ellis, Belinda J. DiMarcello, Debra J. Bradshaw
  • Patent number: 5876466
    Abstract: Suede-like artificial leather is described that is treated with at least one dye selected from the group consisting of sulfur dyes, vat dyes and sulfur vat dyes, and 2,2',4,4'-tetrahydroxy benzophenone. The suede-like artificial leather has excellent color resistance to light and color fastness to both washing and dry-cleaning.
    Type: Grant
    Filed: September 29, 1997
    Date of Patent: March 2, 1999
    Assignee: Kuraray Co., Ltd.
    Inventors: Hitoshi Nakashima, Hisao Yoneda
  • Patent number: 5873912
    Abstract: Improved processes for the exhaust dyeing of cellulosic fibers with sulphur dyes in the presence of non-sulphide reducing agents wherein the dyeing of the textile substrate is performed in a closed vessel in an atmosphere of reduced oxygen level and then oxidizing.
    Type: Grant
    Filed: January 28, 1997
    Date of Patent: February 23, 1999
    Assignee: Clariant Finance (BVI) Limited
    Inventor: Mark Stuart Carlough
  • Patent number: 5873911
    Abstract: Polymeric, water soluble, quaternary ammonium compounds (F) obtainable by quaternization of(a) at least one amino-group-containing urea compound that contains one or more groups of the formula--NH--CO--NH--G--L-- (.alpha.)in which G signifies a bridging groupand L signifies a tertiary, quaternizable amino groupwith(b) (b.sub.1) an epihalohydrin and optionally(b.sub.2) at least one further quaternizing agentto a quaternized product (q)and reaction of the quaternized product (q) with(c) a dialdehyde of formula (I) ##STR1## in which Z signifies methylene or the direct bond, or a urea derivative thereof, are suitable as fixing adjuvants in particular in continuous processes under nearly neutral to acidic conditions especially for the improvement of wet fastnesses of dyeings on hydrophilic fibrous material.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: February 23, 1999
    Assignee: Clariant Finance (BVI) Limited
    Inventors: Bernard Danner, Francis Palacin
  • Patent number: 5766269
    Abstract: A cationic dye (S.sub.K) comprising at least one quaternary ammonium group or protonated or protonizable tertiary amino group and at least one chromophoric radical, wherein the chromophoric radical is the radical of an optionally (pre)reduced sulphur dye, its precursor (S.sub.K1) containing a cationic group which is a secondary amino group of basic character, which is optionally protonated but does not contain an acid group in a substituent of this cationic group, or a mixture thereof and desolubilized derivatives thereof or of their non-quaternized and non-tertiary precursors, which in standardized form are usable as pigments.
    Type: Grant
    Filed: March 11, 1996
    Date of Patent: June 16, 1998
    Assignee: Clariant Finance (BVI) Limited
    Inventors: Jordi Berenguer, Manuel Jose Domingo, Jose Rocas
  • Patent number: 5632782
    Abstract: Improved processes for the exhaust dyeing of cellulosic fibers with sulphur dyes in the presence of non-sulphide reducing agents wherein the dyeing of the textile substrate is performed in a closed vessel in an atmosphere of reduced oxygen level and then oxidizing.
    Type: Grant
    Filed: August 23, 1995
    Date of Patent: May 27, 1997
    Assignee: Clariant Finance (BVI) Ltd.
    Inventor: Mark S. Carlough
  • Patent number: 5611818
    Abstract: By reducing a sulphur dye (S) in aqueous medium with a reducing carbonyl compound in the presence of alkali metal hydroxide and optionally alkali metal (bi)sulphite at temperatures above 60.degree. C. and drying the reaction mixture, there are obtained very stable leuco sulphur dyes (L), which are practically free of sulphides and polysulphides, are readily and completely soluble in water and are usable for the dyeing of substrates dyeable with sulphur dyes, by which a disturbing development of H.sub.2 S or a disturbing inorganic sulphide occurrance in the waste water can be efficiently avoided; by spray-drying in a drying time <4 minutes as described there are obtained sulphide-free, stable leuco sulphur dyes (L) readily soluble in water and particularly suitable for sulphide-free dyeing, in particular for the dyeing of polyamidic fibrous substrates, especially of wool.
    Type: Grant
    Filed: November 22, 1993
    Date of Patent: March 18, 1997
    Assignee: Sandoz Ltd.
    Inventor: Manuel J. Domingo
  • Patent number: 5558677
    Abstract: A process for dyeing and printing textile materials consisting of cellulose fibers or containing cellulose fibers in a blend with other fibers in an aqueous medium at above pH 12 with vattable dyes in the presence of cyclic compounds which contain at least one instance of the structural unit ##STR1## in the ring of the molecule as reducing agents and finishing the dyeing in a conventional manner.
    Type: Grant
    Filed: February 6, 1995
    Date of Patent: September 24, 1996
    Assignee: BASF Aktiengesellschaft
    Inventors: Henric Wagenmann, Ulf Baus, Eberhard Beckmann, Erich Kromm
  • Patent number: 5518508
    Abstract: A continuous process for dyeing yarns with vattable dyes comprises, in continuous yarn dyeing ranges, metering an aqueous dye dispersion into the circulating chemical liquor.
    Type: Grant
    Filed: July 13, 1994
    Date of Patent: May 21, 1996
    Assignee: BASF Aktiengesellschaft
    Inventors: Gert Kuehnel, Peter Richter, deceased, by Wolfgang Richter, legal representative, by Georg Richter, legal representative, Georg Schnitzer
  • Patent number: 5470356
    Abstract: A sulfur dye or sulfurized vat dye is treated in an aqueous reducing medium, preferably an aqueous mixture of alkali and reducing sugar, to form a solution which is then oxidized to form particles of the dye having improved characteristics.
    Type: Grant
    Filed: October 2, 1992
    Date of Patent: November 28, 1995
    Inventor: Laszlo A. Meszaros
  • Patent number: 5240463
    Abstract: The process for dyeing leather by the exhaust method comprises allowing a pigment dispersion and an aqueous solution of sulfur dye to act on the conventionally pretreated leather in one step or in succession. It affords a high depth of shade and a high brilliance which are not achieved by using the pigment or the sulfur dye on its own.
    Type: Grant
    Filed: January 29, 1992
    Date of Patent: August 31, 1993
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Peter Weinheimer, Norbert Ambrecht, Lothar Schlosser
  • Patent number: 5240466
    Abstract: The present invention relates to a process for dyeing leather by the exhaust method, characterized in that water-insoluble sulphur dyes in dispersed form are used.
    Type: Grant
    Filed: February 12, 1992
    Date of Patent: August 31, 1993
    Assignee: Casella Aktiengesellschaft
    Inventors: Wolfgang Bauer, Hubert Kruse, Gert Nagl, Jan-Hilbert Mast, Lothar Schlosser
  • Patent number: 5234465
    Abstract: Cellulose fibers are dyed ecologically soundly with sulfur black dyes by the pad-dyeing process by avoiding sulfides as reducing agent by replacing them by a dithionite-based mixture with at least one reducing sugar. A high color yield, a deep black shade and good reproducibility are ensured. The preferred reducing sugar is glucose.
    Type: Grant
    Filed: January 29, 1992
    Date of Patent: August 10, 1993
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Manfred Hahnke, Ullrich Saalfrank, Claus Schuster, Joachim Steinbach, Gerd Krauzpaul
  • Patent number: 5230711
    Abstract: Water-soluble sulphur dyes can be applied to cellulose without reducing agents, without added salt and without oxidising agents if the cellulose has been grafted with a polymer obtained by polymerisation of at least one N-containing basic monomer.
    Type: Grant
    Filed: April 1, 1992
    Date of Patent: July 27, 1993
    Assignee: Cassella AG
    Inventors: Karl-Heinz Keil, Thomas Martini
  • Patent number: 5131913
    Abstract: Process for producing pattern effects when dyeing or printing textile material in the absence of alkali or reducing agents, which comprises pretreating the textile material with a cationizing agent, drying, applying an oxidizing agent in the form of a pattern, drying and dyeing or printing with reactive, direct, acid, water-soluble sulfur dyes or pigment dyes in the absence of any alkali or reducing agent.
    Type: Grant
    Filed: June 14, 1990
    Date of Patent: July 21, 1992
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Thomas Martini
  • Patent number: 5030248
    Abstract: Cellulosic substrates are dyed by a continuous dyeing method with dispersed sulfur dyes using a reducing sugar, especially glucose, as the reducing agent for the dye.
    Type: Grant
    Filed: August 16, 1989
    Date of Patent: July 9, 1991
    Assignee: Sandoz Ltd.
    Inventor: Laszlo A. Meszaros
  • Patent number: 5019131
    Abstract: A process for redyeing partially bleached fabric or garments to yield sharply-etched multicolored designs comprises the steps of:(a) dyeing the fabric, or purchasing a commercial garment, with a background first color;(b) gathering selected areas of the dyed fabric with ligatures to restrict access of further reagents;(c) bleaching the gathered background dyed to remove the first color from the areas outside the gathered areas; and(d) redyeing the bleached areas with a second color,whereby sharply defined multicolored patterns are formed having from about 0.2 mm to about 2 mm of white gap between each color.
    Type: Grant
    Filed: July 9, 1990
    Date of Patent: May 28, 1991
    Assignee: MMOQ, Ltd.
    Inventor: James L. Nitsch, Jr.
  • Patent number: 4992078
    Abstract: Improved sulfur dye dispersions are obtained by subjecting an aqueous suspension of oxidized sulfur dye particles to membrane separation. The oxidized sulfur dye is obtained by controlled aeration whereby the content of sulfides, polysulfur and inorganic salts is significantly decreased.
    Type: Grant
    Filed: February 23, 1989
    Date of Patent: February 12, 1991
    Assignee: Sandoz Ltd.
    Inventor: Laszlo A. Meszaros