Sulfur Dye Or Vat Dye Patents (Class 8/642)
  • Patent number: 11840788
    Abstract: Indigo-dyed garments are treated with an anti-ozone agent to prevent ozone-related degradation of the garments before laser finishing. Without treatment, the garments can exhibit color loss (e.g., color change or fading) from exposure to ozone in the atmosphere. The indigo-dyed garments with anti-ozone treatment can serve as base templates in a laser finishing process flow. The anti-ozone treatment of the base templates can include a rinse including an ascorbic acid or vitamin C constituent during a base preparation process. Then quantities of these base templates can manufactured and stored for periods of time without exhibiting ozone-related degradation effects.
    Type: Grant
    Filed: July 12, 2022
    Date of Patent: December 12, 2023
    Assignee: Levi Strauss & Co.
    Inventors: Chatura Atukorala, James Barton Sights, David Love, Elizabeth O'Neill, Jeff Zens, Benjamin Bell, Jennifer Schultz, Christopher Schultz, Debdulal Mahanty, Sachith Devendra Samarasinghe
  • Patent number: 11723426
    Abstract: Laser finishing of apparel products allows an operating model that reduces finishing cost, lowers carrying costs, increases productivity, shortens time to market, be more reactive to trends, reduce product constraints, reduces lost sales and dilution, and more. Improved aspects include design, development, planning, merchandising, selling, making, and delivering. The model uses fabric templates, each of which can be used to produce a multitude of laser finishes. Operational efficiency is improved.
    Type: Grant
    Filed: February 8, 2022
    Date of Patent: August 15, 2023
    Assignee: Levi Strauss & Co.
    Inventors: Elizabeth O'Neill, James Barton Sights, Jeff Zens, David Love
  • Patent number: 8932965
    Abstract: Fabrics containing camouflage patterns are produced from dyes wherein at least certain of the colors contained in the pattern contain a low reflectance dye. The low reflectance dye is added to one or more colors in the pattern in order to preserve the camouflage pattern when viewed through night vision goggles as relatively long wavelengths, such at wavelengths greater than 900 nm. In one embodiment, the low reflectance dye comprises a thiazine. The low reflectance dye is blended with other dyes to produce colors in the pattern. By altering the concentration of the low reflectance dye in each of the colors, the colors contained in the camouflage pattern remain separate and distinct even at relatively long wavelengths.
    Type: Grant
    Filed: July 30, 2009
    Date of Patent: January 13, 2015
    Assignee: International Textile Group, Inc.
    Inventor: Dale R. Wendel
  • Publication number: 20140335751
    Abstract: Slasher machines and rope dyeing machines are the main dyeing machine that is used to continuously dye yarn fabrics for denim using indigo dyes. In denim dyeing, indigo (blue color VAT) and some sulfur dyes are mixed together to achieve blue/black/brown color denim fabrics. This invention is the achievement of dyeing reactive/direct/pigment/acid/disperse and other non VAT/sulfur OR its combinations of non VAT/sulfur dyes OR combinations between VAT/sulfur dyes and VAT/sulfur dyes on continuous yarn dyeing machines and relevant apparatus. Its products are also very distinguishable, especially its combinations, hence is a part of the invention.
    Type: Application
    Filed: May 8, 2014
    Publication date: November 13, 2014
    Inventor: Shan James LEE
  • Publication number: 20140082860
    Abstract: An object of the present invention is provide a disperse dye composition that has the light fastness required of synthetic fiber materials for automotive interiors that are exposed to sunlight at high temperature and high humidity, and that has good blue, red, and yellow dyeability. This object is achieved by a mixed disperse dye composition comprising a blue disperse dye composition having a specific composition ratio of five specific types of disperse dyes, and other specific yellow and/or red disperse dyes. The invention makes it possible to provide a disperse dye composition having not only high fastness of each color but light fastness with a favorable balance of the three primary colors, with the dye properties of each color equal during dyeing, and good dye color reproducibility, as well as by a dyeing method using this dye.
    Type: Application
    Filed: June 7, 2012
    Publication date: March 27, 2014
    Applicant: NIPPON KAYAKU KABUSHIKI KAISHA
    Inventors: Yoshiyuki Sato, Toru Yamaguchi
  • Patent number: 8636814
    Abstract: There is a coloring composition containing a compound represented by Formula (1): wherein D, M, N, R1, R2, m and n are defined in the specification and in the claims.
    Type: Grant
    Filed: May 21, 2013
    Date of Patent: January 28, 2014
    Assignee: FUJIFILM Corporation
    Inventors: Yoshihiko Fujie, Keiichi Tateishi, Clive Edwin Foster
  • Patent number: 8628588
    Abstract: There is provided a coloring composition containing: a compound represented by Formula (1) or Formula (4): and a copper compound that is soluble in water: Formula (1) DSO3M)4 or Formula (4) (L)m-(D?)n wherein D, M, L, D?, m and n are defined in the claims and in the specification.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: January 14, 2014
    Assignee: FUJIFILM Corporation
    Inventors: Yoshihiko Fujie, Keiichi Tateishi, Clive Edwin Foster
  • Patent number: 8409300
    Abstract: Novel disperse azo dyes of formula (I), and processes for preparation thereof. These dyes possess superior washing fastness, sublimation fastness and light fastness.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: April 2, 2013
    Assignee: Colourtex Industries Limited
    Inventors: Pankaj Desai, Kiyoshi Himeno, Nikhil Desai
  • Patent number: 8323358
    Abstract: The present invention refers to a red-dyeing acid dye mixture comprising a dye of the formula (I) and at least one dye of the formula (II) a process for its manufacturing and a process for dyeing and printing of natural or synthetic polyamide fiber material in which it used.
    Type: Grant
    Filed: February 6, 2006
    Date of Patent: December 4, 2012
    Assignee: DyStar Colours Deutschland GmbH
    Inventors: Thomas Ruchser, Andreas Giehl
  • Patent number: 8075638
    Abstract: The invention relates to the dyeing of keratin materials using dichromophore dyes with a carbonyl or heterocyclic linker. The invention relates to a dye composition comprising a dye with a carbonyl or heterocyclic linker, and to a dyeing process with a lightening effect on keratin materials, in particular keratin fibers, especially human keratin fibers such as the hair, using said composition, optionally in the presence of a cosmetically acceptable acid or base. It similarly relates to novel dyes and to the uses thereof in lightening keratin materials. This composition makes it possible to obtain a coloring with a lightening effect which is particularly resistant and visible on dark keratin fibers.
    Type: Grant
    Filed: September 23, 2008
    Date of Patent: December 13, 2011
    Assignee: L'Oreal S.A.
    Inventor: Andrew Greaves
  • Publication number: 20110289697
    Abstract: The present invention relates to a process for dyeing sheetlike textile materials with a dye, which comprises a concentrated dye system being applied in a total amount of 1% to 25% by weight, based on the textile material, to the textile material in two or more sub-steps and the dye being fixed on the textile material after each and every sub-step.
    Type: Application
    Filed: August 14, 2009
    Publication date: December 1, 2011
    Applicant: Dystar Colours Deutschland GmbH
    Inventors: Christian Meyer, Wolfgang Schrott, Franz Sütsch
  • Patent number: 8034125
    Abstract: The present invention relates to the dyeing of keratin materials using two colorless dye precursors, at least one of which contains a disulfide/thiol unit, said precursors reacting together chemically to form the color in situ. The process according to the invention makes it possible in the context of certain variants to solve the problems caused by the color generated during the process, while at the same time not degrading the efficacy of the coloration, and especially of the lightening effect. The colorations obtained are moreover powerful, chromatic, sparingly selective, and fast with respect to external agents such as sunlight, perspiration and especially shampoo.
    Type: Grant
    Filed: September 23, 2008
    Date of Patent: October 11, 2011
    Assignee: L'Oreal S.A.
    Inventors: Andrew Greaves, Nicolas Daubresse
  • 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
  • Patent number: 7666232
    Abstract: A reactive trichromatic set comprising (a) at least one of the following reactive red dye of formula (I), wherein R1, R2, R3, X, D, Z, and n are defined the same as in the specification; (b) at least one reactive yellow dye selected from the following Color Index; C.I. Reactive Yellow 145 and C.I. Reactive Yellow 176; and (c) at least one reactive blue dye selected from the following Color Index; C.I. Reactive Blue 194, C.I. Reactive Blue 221 and C.I. Reactive Blue 222.
    Type: Grant
    Filed: June 22, 2006
    Date of Patent: February 23, 2010
    Assignee: Everlight USA, Inc.
    Inventors: Wen-Jang Chen, Bao-Kun Lai, Te-Chin Sung, Cheng-Hsiang Hsu
  • 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
  • Publication number: 20090100610
    Abstract: Disclosed are mixtures of sulfide dyes and dyeing compositions comprising mixtures of sulfide dyes. The dye mixtures are useful for the dyeing of organic materials, such as keratin fibers, preferably human hair.
    Type: Application
    Filed: September 13, 2006
    Publication date: April 23, 2009
    Inventors: Christian Cremer, Victor Paul Eliu, Beate Frohling, Olof Wallquist
  • Publication number: 20090100611
    Abstract: An acid dye composition comprising a dyestuff according to the formula (I) and a dyestuff according to the formula (II) and a dyestuff according to the formula (III)
    Type: Application
    Filed: July 17, 2006
    Publication date: April 23, 2009
    Inventors: Helmut Sieber, Rino Marazzi
  • Patent number: 7282070
    Abstract: A reactive dye composition having satisfactory reproducibility, leveling, washing off and toughness under balanced affinity and reactivity, and improving Right First Time success ratio, for dyeing a cellulose fiber or fiber materials containing the cellulose fiber. The reactive dye composition comprising: (a) at least one reactive red dyestuff selected from the group consisting of the following formulas, the component (a) is present in an amount ranging from 1% to 99% by weight, and (b) at least one yellow reactive dyestuff selected from the group consisting of the following Color Index: C.I. Reactive Yellow 145 and C.I. Reactive Yellow 176, and at least one blue reactive dyestuff selected from the group consisting of the following Color Index: C.I. Reactive Blue 194, C.I. Reactive Blue 221 and C.I. Reactive Blue 222, the component (b) is present in an amount ranging from 99% to 1% by weight.
    Type: Grant
    Filed: October 19, 2005
    Date of Patent: October 16, 2007
    Assignee: Everlight USA, Inc.
    Inventors: Wen-Jang Chen, Chien-Yu Chen, Bao-Kun Lai, Ya-Chi Tseng
  • Patent number: 6398822
    Abstract: Packaged hair coloring composition comprising a stable aqueous hair coloring composition comprising a compound of formula (I): wherein the variables are each as defined in the claims. The packaged hair coloring compositions of the present invention provide improved wash fastness of dye on hair, less color fade over time, improved consumer acceptance in terms of providing a single packaged hair dye composition and improved product stability.
    Type: Grant
    Filed: December 18, 2000
    Date of Patent: June 4, 2002
    Assignee: The Proctor & Gamble Company
    Inventors: Earl David Brock, Heather Holden Harper, Taher Iqbal Yousaf
  • 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
  • Publication number: 20010009045
    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: Application
    Filed: November 22, 1999
    Publication date: July 26, 2001
    Inventors: J. MICHAEL HIPP, MARK S. CARLOUGH, WILLIAM T. SHERRILL, PETER STAHALA
  • Publication number: 20010004780
    Abstract: The present invention relates to textile spun-dyed fiber material comprising synthetic fibers or mixtures of cellulosic and synthetic fibers for producing military camouflage articles, wherein the synthetic fiber fraction is spun-dyed with a dye having a chlorophyll-like reflectance in the IR region, and to its use for producing military camouflage print articles.
    Type: Application
    Filed: December 20, 2000
    Publication date: June 28, 2001
    Inventors: Horst Roland Mach, Guido Krabbe
  • 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: 5972050
    Abstract: Mixtures comprise the dye of the formula I ##STR1## the dye C.I. Sulphur Black 1 (53 185), at least one disazo dye of the formula II ##STR2## where the ring A, X.sup.1, R.sup.1, R.sup.2 and R.sup.
    Type: Grant
    Filed: October 26, 1998
    Date of Patent: October 26, 1999
    Assignee: BASF Aktiengesellschaft
    Inventors: Matthias Wiesenfeldt, Johannes Peter Dix, Rolf Streicher, Manfred Herrmann, Gunther Lamm
  • Patent number: 5951717
    Abstract: A dyeing process comprises continuous dyeing of cellulosic circular knit, which comprises impregnating a rope of said circular knit with an aqueous liquor comprising one or more dissolved and/or dispersed dyes, any necessary fixing alkali and optionally further assistants at a temperature between 20 and 95.degree. C., squeezing off said impregnated rope and subsequently feeding said squeezed-off rope without intermediary drying into an apparatus in which said rope is opened out into a crease-free state and said dye is fixed in an unsaturated steam/air mixture which is at 100 to 160.degree. C. at an autogenous wet temperature of the moist rope of between 50 and 95.degree. C. and a fixing time of at least 20 seconds.
    Type: Grant
    Filed: March 10, 1998
    Date of Patent: September 14, 1999
    Assignee: DyStar Textilfarben GmbH & Co.
    Inventors: Uwe Mrotzeck, Andreas Schrell, Thomas Nauroschat, Erol Ozcan, Alfred Tressel
  • Patent number: 5882359
    Abstract: Vat dye mixtures comprising at least two structurally different dyes which have the formula ##STR1## in which X is phenyl which is unsubstituted or substituted by C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy or halogen; morpholino; or the radical --SR.sub.3 ; R.sub.1 and R.sub.2 independently of one another are each hydrogen or the radical --NHCO--C.sub.6 H.sub.5, and R.sub.3 is C.sub.1 -C.sub.4 alkyl, or phenyl which is unsubstituted or substituted by C.sub.1 -C.sub.4 alkyl or halogen, which are suitable for dyeing cellulosic fiber materials and give dyeings with good allround properties, are described.
    Type: Grant
    Filed: July 31, 1997
    Date of Patent: March 16, 1999
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Peter Leupin, Roland Zoelper
  • Patent number: 5647875
    Abstract: A desired color shade is produced on a textile substrate by treating a dyed textile substrate, which has an initial color shade which is partly due to color caused by the presence thereon of a vat dye and partly due to color caused by the presence thereon of a sulfur dye, with a chlorine-free decolorizing agent, such as hydrogen peroxide in an aqueous alkaline medium, whereby the color shade of the substrate is changed from said initial color shade to said desired color shade by removal therefrom of a proportion of the color attributable to the sulfur dye without removing as large a proportion of the color attributable to the vat dye.
    Type: Grant
    Filed: December 2, 1994
    Date of Patent: July 15, 1997
    Assignee: Clariant Finance (BVI) Limited
    Inventor: Michael W. Dixon
  • Patent number: 5364415
    Abstract: Leuco vat dyes are employed to produce brighter shades from oxidative dyes in oxidative haircoloring systems and processes.
    Type: Grant
    Filed: May 27, 1993
    Date of Patent: November 15, 1994
    Assignee: Clairol Inc
    Inventor: David M. Lewis
  • Patent number: 5358536
    Abstract: According to the present invention, there can be provided a black dyestuff for heat-sensitive transfer record comprising at least one orange dyestuff represented by the formulaAr.sub.1 --N=N--Ar.sub.2 --N=N--Ar.sub.3 ( 1)[wherein each of Ar.sub.1, Ar.sub.2 and Ar.sub.3 is independently an aryl group which may have a substituent] and at least one blue dyestuff represented by the formula ##STR1## [wherein each of R.sub.1, R.sub.2 and R.sub.3 is independently a hydrogen atom, halogen atom, nitro group, hydroxyl group, alkyl group which may have a substituent, alkoxy group, alkylsulfonylamino group or alkylcarbonylamino group, and each of R.sub.4 and R.sub.5 is independently an alkyl group which may have a substituent, and a black heat-sensitive transfer sheet in which the above-mentioned dyestuff is used.
    Type: Grant
    Filed: July 31, 1992
    Date of Patent: October 25, 1994
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Hitoshi Koshida, Isamu Ghoda, Tsukasa Ohyama, Keisuke Takuma
  • 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: 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: 5034016
    Abstract: Dyed denim cotton yarns capable of meeting the market demand for color jeans can be provided by immersing denim cotton yarns in a dye bath containing a dye or dye composition comprising a specific indirubin derivative(s), a specific quinophthalone derivative(s) and/or an indigo dye, squeezing and air-oxidizing the dyed yarns, and repeating a series of these steps.
    Type: Grant
    Filed: May 24, 1989
    Date of Patent: July 23, 1991
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Hitoshi Koshida, Tetsuo Sakagawa, Takayuki Nakayama, Hiroshi Suwa, Masao Imai, Akio Karasawa
  • Patent number: 4941887
    Abstract: Disclsoed herein is dye suitable for use in dyeing denim cotton yarns. The dye comprises at least one quinophthalone derivative represented by the following general formula (I) or (II): ##STR1## wherein X means H, Br or Cl and Y denotes H, COOR or --COOC.sub.2 H.sub.4 OR (R: alkyl), or a combination of said at least one quinophthalone derivative and an idigo dye. A dyeing process making use of the above dye and denim cotton yarns thus dyed are also disclosed.
    Type: Grant
    Filed: January 22, 1988
    Date of Patent: July 17, 1990
    Inventors: Tetsuo Sakagawa, Takayuki Nakayama, Hisanobu Kunihiro, deceased, by Masako Kunihiro, legal representative
  • Patent number: 4902300
    Abstract: Synthetic/cellulosic blend textile fabrics are simultaneously dyed and the synthetic component simultaneously treated to impart flame resistance in a single step with good color yield. Additional fabric finishing may be used to impart flame resistance to the cellulosic component of the fabric.
    Type: Grant
    Filed: May 19, 1988
    Date of Patent: February 20, 1990
    Assignee: Burlington Industries, Inc.
    Inventors: James R. Johnson, Randolph L. Finley
  • Patent number: 4801303
    Abstract: Polyester-cotton blend textile substrates are dyed with a disperse dye and then with a sulfur dye from the same dyebath which is maintained at a temperature no higher than 105.degree. C. when the sulfur dye is present therein and which preferably contains glucose as the reducing agent for the sulfur dye.
    Type: Grant
    Filed: June 1, 1987
    Date of Patent: January 31, 1989
    Assignee: Sandoz Ltd.
    Inventors: Mark S. Carlough, Laszlo A. Meszaros
  • Patent number: 4723961
    Abstract: The alkaline reoxidation of vat and sulfur vat dyes by means of hydrogen peroxide is difficult to control and to keep constant. By using agents which split off hypochlorite in the heat, for example sodium N-chloro-p-toluenesulfonamide, at pH values above 8 it is possible according to the invention even to reoxidize reliably combinations of these dyes having different oxidation behaviors. At the same time it became possible to combine the necessary soaping process with reoxidation.
    Type: Grant
    Filed: September 9, 1986
    Date of Patent: February 9, 1988
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Heinrich O. Bernhardt
  • Patent number: 4654046
    Abstract: The invention relates to a thermosol pad-steam process for the continuous dyeing of cellulose/polyamide blends, which comprises impregnating said blends with a pad liquor which contains a non-ionic surfactant or a mixture of non-ionic surfactants, in addition to at least one vat dye and at least one metal complex dye and optionally further auxiliaries.This process is particularly suitable for dyeing large yardages.
    Type: Grant
    Filed: December 20, 1985
    Date of Patent: March 31, 1987
    Assignee: Ciba-Geigy Corporation
    Inventor: Hellmut Felle
  • Patent number: 4588409
    Abstract: Textile products comprising a cellulosic substrate are colored with two or more dyes which differ in their respective resistance to chlorine bleaches. The initial color of the textile is determined by the combined effect of the dyes. Thereafter, textile products which may be in the form of garments, bed linens, draperies, or yard goods, are treated with an aqueous solution of bleach to decolorize, to a pre-determined degree, one or more of the dyes, to thereby change the color of the textiles.
    Type: Grant
    Filed: December 22, 1983
    Date of Patent: May 13, 1986
    Inventor: Owen H. Sercus
  • Patent number: 4443226
    Abstract: Work clothing, having an optical warning effect, which has been dyed in specific, prescribed color shades and is not coated with plastics is desired by the authorities. Thioindigo and/or derivatives of the red and pink series of thioindigo, as the base dyestuff, in combination with specific yellow disperse dyestuffs have proved usable, for dyeings on polyester fibers or polyester/cotton fiber mixtures, which are in the required shade of fluorescent orange-red and meet the requirements regarding color point, luminance and fastness to light. Both the exhaustion process and the thermosol process can be used to produce these dyeings.
    Type: Grant
    Filed: February 7, 1983
    Date of Patent: April 17, 1984
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Helmut Rohser
  • Patent number: 4314812
    Abstract: According to two-phase processes multi-color effects are obtained on cellulosic materials, namely conversion effects with reactive and vat dyestuffs on the one hand and discharge resist prints with reactive dyestuffs and, optionally, vat dyestuffs on the other hand, by printing or padding the reactive dyestuff or a mixture of reactive and vat dyestuffs in a weakly acidic medium onto the material, overprinting this material with a neutral paste containing a stable discharging agent of the sulfinic acid series and, if desired, a vat dyestuff, drying the print, contacting the material with an aqueous strongly alkaline liquor, steaming it and finishing the article in known manner, depending on the choice of dyestuffs.
    Type: Grant
    Filed: July 1, 1980
    Date of Patent: February 9, 1982
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Erich Feess
  • Patent number: 4314811
    Abstract: According to two-phase processes multi-color effects are obtained on cellulosic materials, namely conversion effects with reactive and vat dyestuffs on the one hand and discharge resists prints with reactive dyestuffs and, optionally, vat dyestuffs on the other hand, by printing or padding the reactive dyestuff or a mixture of reactive and vat dyestuffs in a weakly acidic medium onto the material, overprinting this material with a neutral paste containing formamidine sulfinic acid as discharging agent and, if desired, a vat dyestuff, drying the print, contacting the material with an aqueous strongly alkaline liquor, steaming it and finishing the article in known manner, depending on the choice of dyestuffs.
    Type: Grant
    Filed: July 1, 1980
    Date of Patent: February 9, 1982
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Erich Feess, Friedrich Reinhardt
  • Patent number: 4285692
    Abstract: Process for the production of granular mixtures of vat dyestuffs and/or disperse dyestuffs, characterized in that liquid or pasty, finished formulations of two or more vat dyestuffs and/or disperse dyestuffs are spray-dried together to form granules.
    Type: Grant
    Filed: October 4, 1979
    Date of Patent: August 25, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Willy Schiwy, Jurgen Schulze, Ferdinand Hummes, Peter Schulze, Reinhold Hornle, Hans-Heinz Molls, Harry Orttmann
  • Patent number: 4213900
    Abstract: Easily water-dispersible pulverulent formulations of disperse dyes are prepared by spray-drying a dye solution which comprises(a) one or more disperse dyes,(b) one or more water-soluble anionic dispersants,(c) from 0 to 20% by weight, based on (a+b+c+d), of other surfactants and(d) from 0 to 20% by weight, based on (a+b+c+d) of agents which serve as protective colloids (the proportion of (c+d) being at most 20% by weight).Suitable solvents (e) are formic acid, formamide, N-methylformamide, butyrolactone, ethylene glycol and propylene glycol, which may in addition contain up to 100% by weight, based on (e), of N,N-dimethylformamide or acetic acid or mixtures of these. The formulations obtained by the above process contain the dye in very fine dispersion.
    Type: Grant
    Filed: July 17, 1978
    Date of Patent: July 22, 1980
    Assignee: BASF Aktiengesellschaft
    Inventors: Ewald Daubach, Dieter Horn, Erwin Hahn, Herbert Uhrig