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.
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.
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.
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.
May 22, 1992
Date of Patent:
February 22, 1994
Rudolf Binder, Ulrich Buhler, Friedrich Schophoff, Margareta Boos, Reinhard Kuhn
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.
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.
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.
November 13, 1992
Date of Patent:
December 14, 1993
Wolfgang Schlenker, Dieter Werthemann, Claude Eckhardt
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.
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.
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.
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.
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.
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.
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.
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.
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.
March 18, 1992
Date of Patent:
September 21, 1993
Unilever Patent Holdings B.V.
Keith R. F. Cockett, Martin Concannon, Maurice Webb
Abstract: A method for tinting a water-absorptive contact lens to have a mark tinted thereon, which comprises superimposing on a water-absorptive contact lens in the dry state a screen provided with a tinting pattern corresponding to the mark to be tinted on the contact lens, applying to the contact lens through the tinting pattern of the screen a dye solution containing a vat dye and an alkaline reducing agent, followed by insolubilizing the vat dye.
Abstract: A novel black coloring material is obtained by treating a chitosan with a dyestuff of the lithospermum root. If a water-insoluble chitosan is used as the chitosan, a finely divided black coloring material is obtained, and if a gelatinous chitosan salt is used as the chitosan, a gelatinous black coloring material is obtained. If a water-soluble chitosan, chitosan oligosaccharide or D-glucosamine, or a salt thereof is used as the chitosan, a liquid black coloring material is obtained. If a powdery polymeric substance is treated with such a black coloring material, a polymer-based black coloring material is obtained, and if a fiber is dyed with such a black coloring material, the fiber is dyed to a black color having a low lightness.