Patents Examined by A. Lionel Clingman
  • Patent number: 5364417
    Abstract: A process for dyeing nylon with acid or premetallized acid dyes is provided wherein the dye bath is brought to a temperature of 160.degree.-230.degree. F. and a pH of 5.5-4.0, followed by the gradual addition of sulfamic acid to lower the pH to 3.75-2.25, thereby improving dye exhaustion.
    Type: Grant
    Filed: November 16, 1992
    Date of Patent: November 15, 1994
    Assignee: Milliken Research Corporation
    Inventors: David E. Wenstrup, Sammy L. Roe
  • Patent number: 5316553
    Abstract: Salts of ionic dyes with compounds which contain at least one ammonium, cycloammonium or immonium group and at least one aliphatic, cycloaliphatic or carbonyl radical-substituted aromatic group or containing a piperazine or piperidine group or a heteroaromatic group selected from those of the triazine, pyrimidine, quinazoline, quinoxaline, phthalazine or phthalimidine series or which contain at least two carboxylic acid groups, at least one amino group and at least one carboxylic acid group or at least one sulfonic acid group and one aliphatic, cycloaliphatic, monocyclic aromatic or heteroaromatic group are useful for dyeing synthetic materials, particularly synthetic polyamides in the mass. The obtained dyeings have exceptionally good wet fastness.
    Type: Grant
    Filed: July 26, 1991
    Date of Patent: May 31, 1994
    Assignee: Sandoz Ltd.
    Inventors: Bansi L. Kaul, Angelos-Elie Vougioukas
  • Patent number: 5298033
    Abstract: An ultraviolet radiation absorbing agent for bonding to an ocular lens. The agent has the formulaA--NH--Bwherein A is an ultraviolet absorbing compound and B is a specific reactive group or a moiety containing reactive group.
    Type: Grant
    Filed: January 12, 1993
    Date of Patent: March 29, 1994
    Assignee: Ciba-Geigy Corporation
    Inventors: William M. Hung, Kai C. Su
  • Patent number: 5288680
    Abstract: The present invention relates to a process for the preparation of finished dyeings of high fastness to thermomigration on fibre materials consisting completely or partly of polyester, characterized in that the material is dyed with one or more dyestuffs of the general formula I ##STR1## wherein R denotes linear (C.sub.1 -C.sub.3)-alkyl or (C.sub.3 -C.sub.6)-alkyl which is interrupted by an oxygen atom andR.sup.1 denotes (C.sub.1 -C.sub.4)-alkyl,and the dyeing thus obtained is then finished.
    Type: Grant
    Filed: May 22, 1992
    Date of Patent: February 22, 1994
    Assignee: Cassella Aktiengesellschaft
    Inventors: Rudolf Binder, Ulrich Buhler, Friedrich Schophoff, Margareta Boos, Reinhard Kuhn
  • Patent number: 5279621
    Abstract: The present invention relates to a process for the HT dyeing of polyester or polyester-containing textile materials at pH 8 to pH 11, characterized in that one or more monoazo dyes are used of the general formula I ##STR1## wherein X, Y, R.sup.1 and R.sup.2 are each as defined in Claim 1.
    Type: Grant
    Filed: February 18, 1992
    Date of Patent: January 18, 1994
    Assignee: Cassella AG
    Inventor: Ulrich Buhler
  • Patent number: 5273551
    Abstract: The invention relates to a process for fixing reactive dyes on cellulosic textile material and to apparatus for carrying out said process.The process comprises wetting the dried fibre material, which has been printed with reactive dyes, with water, covering the printed material with water-impermeable material and subjecting it to a heat treatment. The fixation can be carried out with advantage using minor amounts of urea, but preferably without urea, to give prints of good quality.
    Type: Grant
    Filed: July 24, 1992
    Date of Patent: December 28, 1993
    Assignee: Ciba-Geigy Corporation
    Inventors: Wolfgang Brehme, Rolf Hopf
  • Patent number: 5269815
    Abstract: A process for the fluorescent whitening of hydrophobic textile materials, especially polyesters, wherein the textile material is treated with disperse fluorescent whitening agents in supercritical CO.sub.2.
    Type: Grant
    Filed: November 13, 1992
    Date of Patent: December 14, 1993
    Assignee: Ciba-Geigy Corporation
    Inventors: Wolfgang Schlenker, Dieter Werthemann, Claude Eckhardt
  • Patent number: 5268005
    Abstract: A method for dyeing nylon filaments for use in wear-indicating toothbrushes includes immersing a batch of a first nylon filament for between 10 minutes and 80 minutes in an aqueous solution containing between 0.01% and 0.19% weight to volume of Indigotine dye, said solution having a pH between 1 and 7 and having a temperature between 50.degree. C. and 90.degree. C., the dye penetrating into the filament to color an outer cross-sectional region and not penetrating into an inner cross-sectional region of the filament; removing the batch of the first nylon filament from the solution, and repeating the steps for a batch of a second nylon filament, reusing the same solution.
    Type: Grant
    Filed: December 22, 1992
    Date of Patent: December 7, 1993
    Assignee: Gillette Canada Inc.
    Inventor: Christopher H. Suhonen
  • Patent number: 5266078
    Abstract: A method of enhancing the whiteness of a cellulosic material is described which comprises incorporating therein, or applying thereto, a fluorescent whitening agent, a water soluble phosphonate having 1 to 5 phosphonate groups and/or a water soluble carboxylate having 2 to 5 carboxylate groups at a neutral or alkaline pH.
    Type: Grant
    Filed: February 19, 1992
    Date of Patent: November 30, 1993
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Ulrich Welkener, Thord Hassler, Gunilla Hakansson
  • Patent number: 5259850
    Abstract: A granular type reactive dye composition containing a reactive dye, an inorganic salt and water, the water content being from 4.5 through 15% by weight and the inorganic salt content being 20% by weight or less, both based on the weight of the composition, which is excellent in storage stability, compatibility with water and hot water, and reproducibility, when used for dyeing or printing cellulose fibers.
    Type: Grant
    Filed: August 16, 1991
    Date of Patent: November 9, 1993
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Naoki Harada, Noriaki Yamauchi, Syuhei Hashizume, Yutaka Kayane, Kazumi Yoshigoe, Isao Nakamae
  • Patent number: 5256161
    Abstract: An improved aqueous dyestuff preparation which is suitable for the dyeing or printing of substrates contains a water-soluble lithium compound and an alkali, in particular sodium hydroxide.
    Type: Grant
    Filed: April 28, 1992
    Date of Patent: October 26, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Joachim Grutze, Friedhelm Buse, Johannes Haas, Manfred Hobohm
  • Patent number: 5254136
    Abstract: Provided is a fiber reactive dye composition which can dye or print cellulose based fiber materials or materials containing the fiber materials uniformly with good build-up property and reproducibility and give dyed or printed products excellent in various fastness properties.A fiber reactive dye composition which comprises at least five reactive dyes selected from the groups of reactive dyes represented by the following formulas (I) to (VII) respectively in the form of free acid: ##STR1## wherein R.sub.1 and R.sub.2 are each hydrogen, alkyl, ureido or the like, R.sub.5 and R.sub.6 are each hydrogen, sulfo or the like, R.sub.3, R.sub.4, R.sub.7 to R.sub.13 and R.sub.15 to R.sub.18 are each hydrogen, alkyl or the like, R.sub.14 is --O-- or ##STR2## A, B, D, E, G, J and L are each phenylene or the like, X.sub.1 to X.sub.6 are each halogen, Y.sub.1 to Y.sub.7 are each --SO.sub.2 CH.dbd.CH.sub.2 or --SO.sub.2 C.sub.2 H.sub.4 Z, Z being a group capable of being split off by the action of an alkali, m.sub.1 to m.
    Type: Grant
    Filed: July 30, 1992
    Date of Patent: October 19, 1993
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Miwako Fujii, Naoki Harada, Shuhei Hashizume
  • Patent number: 5252104
    Abstract: Products (E) obtainable by reaction of condensation products (K) of(a) formaldehyde or a formaldehyde-yielding compound,(b) at least one (C.sub.1-5 -alkyl)-phenol and(c) at least one amine that contains at least two NH-groups that are reactive with formaldehyde,with the proviso that there are employed 1 mole (c) .+-.5 mole % and 1.6 to 2.4 moles of formaldehyde (a) or the corresponding amount of a formaldehyde-yielding compound (a) per mole of (C.sub.1-5 -alkyl)-phenol (b), with(d) alkyleneoxide and optionally styreneoxideand optionally quaternization of the reaction product and/or modification thereof by introduction of at least one anionic group, or mixtures of such products are eminently suitable as dyeing assistants, in particular as levelling agents for the dyeing of hydrophilic cellulosic and/or polyamidic substrates with dyes of high affinity for the substrate.
    Type: Grant
    Filed: September 3, 1991
    Date of Patent: October 12, 1993
    Assignee: Sandoz Ltd.
    Inventor: Hans-Peter Baumann
  • Patent number: 5252103
    Abstract: An improved pigmented product is obtained by a pigmenting method comprising the steps of:treating a cellulose fiber textile product with a cationic compound; andtreating the thus-treated textile product by immersing it in a aqueous dispersion containing a pigment and an anionic compound.
    Type: Grant
    Filed: February 5, 1992
    Date of Patent: October 12, 1993
    Assignee: Matsui Shikiso Chemical Co, Ltd.
    Inventors: Masayasu Kamata, Osamu Sasaki, Shouzou Suefuku, Tatsuya Maeda
  • Patent number: 5250079
    Abstract: A process for the treatment of fibrous material from aqueous medium in the presence of an application assistant (P) comprising components (a) and (b), in particular for nitrogen-containing substrates; the compositions (P), (P.sub.1) and (P.sub.2) and compositions comprising (P) and anionic dye or optical brightener.
    Type: Grant
    Filed: August 7, 1992
    Date of Patent: October 5, 1993
    Assignee: Sandoz Ltd.
    Inventor: Hans-Peter Baumann
  • Patent number: 5250078
    Abstract: Dyeing polyester textile material with disperse dyes from supercritical CO.sub.2 gives stronger dyeings by carrying out the subsequent pressure reduction in a plurality of steps.
    Type: Grant
    Filed: May 12, 1992
    Date of Patent: October 5, 1993
    Assignee: Ciba-Geigy Corporation
    Inventors: Wolfgang Saus, Dierk Knittel, Eckhard Schollmeyer, Hans-Jurgen Buschmann
  • Patent number: 5248314
    Abstract: The present invention relates to a process for the HT dyeing of polyester or polyester-containing textile materials at pH 8 to pH 11, characterised in that one or more monoazo dyes are used of the general formula I ##STR1## where Hal is chlorine or bromine,R is alkyl of 3 to 7 carbon atoms, andR.sup.1 and R.sup.2 are each independently of the other linear alkyl of 2 to 5 carbon atoms or allyl.
    Type: Grant
    Filed: October 26, 1992
    Date of Patent: September 28, 1993
    Assignee: Hoechst Mitsubishi Kasei Co.
    Inventor: Ulrich Buhler
  • Patent number: 5246467
    Abstract: It is necessary to remove unbound reactive dyes from the surfaces of textile substrates treated with dyes of this class; this is to ensure the dyed substrate is fast. In the invention dye is removed from a wash medium by contracting the medium with an absorbent, preferably a hydrotalcite-like material, which removes suspended dye. This removal allows re-use of the wash medium or its disposal.
    Type: Grant
    Filed: March 18, 1992
    Date of Patent: September 21, 1993
    Assignee: Unilever Patent Holdings B.V.
    Inventors: Keith R. F. Cockett, Martin Concannon, Maurice Webb
  • Patent number: 5244476
    Abstract: The present invention relates to compounds of the general formula I ##STR1## in which R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, x and y are defined as in the description, processes for their preparation, their use for improving the light stability of polyester dyeings and a dyeing process and dye preparations.
    Type: Grant
    Filed: March 13, 1992
    Date of Patent: September 14, 1993
    Assignee: Cassella AG
    Inventors: Joachim Schulz, Gunter Bartels
  • Patent number: 5244471
    Abstract: The present invention relates to a process for the HT dyeing of polyester or polyester-containing textile materials at pH 8 to pH 11, characterized in that one or more monoazo dyes are used of the general formula I ##STR1## where X.sup.1 to X.sup.4, Y.sup.1 to R.sup.4 and R are each as defined in claim 1.
    Type: Grant
    Filed: January 29, 1992
    Date of Patent: September 14, 1993
    Assignee: Cassella AG
    Inventor: Ulrich Buhler