Abstract: A method is described for delivering a species to a liquid, whereby porous particles are exposed to a condition such that the species is rapidly released into the liquid. Each of the porous particles comprises an agglomeration of primary particles so that outer surfaces of said primary particles define pores of said porous particles. The primary particles comprise silica and the species is disposed in the pores of the porous particles.

Abstract: Solubility changeable dye compositions include a dye component linked via a linker moiety to a stimulus responsive hydrophobic moiety which modulates the solubility of the dye, wherein the hydrophobic moiety is configured to be de-linked from the dye component on exposure to a stimulus and render the dye component more hydrophilic. A method of dying a substrate with such dye compositions includes contacting the dye with the substrate.

Abstract: The present invention provides acidic compositions and methods that are adapted to impart color to cementitious or mineral substrate surfaces. Specifically, the present invention relates to acidic compositions and methods adapted to treat cementitious or mineral substrate surfaces that have the advantage of using a less corrosive acid-based solution. The acidic composition incorporates species including a weak base in equilibrium with a conjugate acid. The presence of such species moderates the corrosive behavior of the acid while still allowing excellent coloring action to occur.

Abstract: Disclosed herein are solubility changeable dye compositions, methods of preparing such compositions and methods of using them. The composition includes a dye component linked via a linker moiety to a stimulus responsive hydrophobic moiety which modulates the solubility of the dye, wherein the hydrophobic moiety is configured to be de-linked from the dye component on exposure to a stimulus and render the dye component more hydrophilic.

Abstract: According to a first aspect of the invention, a process is provided for the preparation of amorphous particles comprising a homogeneous distribution of one or more dyes encapsulated by an amorphous, siliceous encapsulating agent, the process comprising: (a) providing a precursor of the encapsulating agent in liquid form; (b) providing the one or more dyes in liquid form; (c) mixing the liquid forms; (d) aerosolizing the mixture to form droplets comprising the one or more dyes and encapsulating agent; and (e) heating the droplets to form the particles comprising the one or more dyes encapsulated by the siliceous encapsulating agent; wherein at least one of the liquid forms provided is aqueous and the or each aqueous liquid form is acidic. According to a second aspect of the invention, encapsulated dyes made by the process of the first aspect of the invention are provided.

Abstract: The present invention relates to a method of protecting organic material, especially from the pharmaceutical, food and nutrition sectors, from light, which method comprises applying to or incorporating in a carrier material a combination of the dye of formula (1) the dye of formula (2) and a UV absorber and, optionally, further dyes, and positioning the so-treated carrier material between the light source and the organic material to be protected

Abstract: The present invention relates to a composition for the oxidation dyeing of keratin fibers, in particular of human keratin fibers such as the hair, comprising at least one oxidation base chosen from 4,5- or 3,4-diaminopyrazoles and triaminopyrazoles, in combination with at least one selected mineral compound, and also to the dyeing process using this composition with an oxidizing agent.

Abstract: The invention concerns compounds derived from diaminopyrazole of formula (I), wherein: R1 is a linear or branched radical selected among C2, C3, C4 aminoalkyl radicals or C2, C3, C4 aminoalkenyl radicals, or one of the physiologically acceptable salts thereof. The invention also concerns compositions containing said compound for dyeing keratinous fibers and the method using said compositions.

Abstract: A composition for colouring the surface of a porous substrate is disclosed comprising a colorant, a binding agent, and a water-repelling agent is disclosed wherein upon application of the composition to the surface of the porous substrate, the composition penetrates the surface through the pores of the substrate, and adds colour to the surface of the porous substrate. Also disclosed is the method for coloring a substrate, a colored surface of a porous substrate and a process for producing such a composition.

Abstract: Provided is a novel method of dyeing a corespun yarn which comprises an inorganic fiber core and at least a first sheath. The method comprises: (a) contacting the corespun yarn with a dye liquor; (b) heating the dye liquor to a dyeing temperature for a time effective to dye the yarn; (c) cooling the dye liquor at a controlled rate; and (d) rinsing the yarn with water or with a mixture comprising the dye liquor and water. The dyed corespun yarn has a strength retention of about 80% or more based on the undyed yarn. The methods in accordance with the invention allow for the formation of uniformly dyed, high strength corespun yarns. Also provided is a dyed, corespun yarn which can be made by the inventive method, a fabric formed from the corespun yarn, as well as a product upholstered with the fabric. The dyed yarns exhibit substantially no “grin through” and little to no yarn strength loss after dyeing.

Abstract: A coding scheme to identify the connections an optical fiber is to form in an optical assembly is provided. The coding scheme consists of a series of colors, typically four, provided along the fiber length. The combination of colors identifies the connection the fiber is to form. Colors are transferred to the optical fiber by sublimation of the dye at a relatively low temperature. The sublimed dye then diffuses into the outer coating of the optical fiber.

Abstract: A decorative dye colorant for use on various types of natural stone, such as granite, marble, limestone, and soapstone. The colorant is formed by mixing a solvent soluble dye with a suitable solvent, such as a ketone or an alcohol to form a dye solution. The solvent enables the dye to penetrate easily into the pores or openings located in the surface of the stone to color the stone so as not to mar the appearance of the surface of the stone. The dye is resistant to removal or discoloration, but may be removed by extended contact of certain chemicals with the dye. To permanently prevent the removal of the dye, a sealer is applied over the dye to prevent any such materials from contacting the dye. The sealer is comprised of an aliphatic urethane mixed with the alcohol xylol that also includes ultraviolet light resistant properties to prevent the dye from fading over time.

Abstract: The present invention features compositions and methods for improving the quality of images printed on a substrate. The novel image-enhancing compositions contain an image-enhancing agent comprising a mixture of a polyacid and a polybase. When applied to a substrate, the compositions provide for high quality printed images when the treated substrate is printed on with an ink containing a reactive dye having ionizable and/or nucleophilic groups capable of reacting with the image-enhancing agent. Images printed on a substrate treated with the image-enhancing compositions of the invention are bleed-resistant, water-resistant (e.g., water-fast), and/or are characterized by enhanced chroma and hue.

Abstract: There is provided a method of adhering dye to a silica. The method comprises providing a silica slurry which includes a plurality of silica particles, depositing alum in the pores of the silica particles, reacting a base with the alum to convert the alum into aluminum hydroxide resulting in treated silica particles. The treated silica particles are then filtered and washed. Thereafter, a dye is mixed with the treated silica particles. The resultant dyed silica product is resistant to dye migration.

Abstract: The invention provides a process for preparing a solid state dye laser in a composite glass matrix, without the use of polymerization initiators, comprising preparing a porous silica gel, effecting thermal treatment thereof at a temperature of at least 500.degree. C. to produce a glass with improved mechanical properties, impregnating a solid state laser dye dissolved in methylmethacrylate into the silicon gel glass in a closed container and effecting heat polymerization of the methylmethacrylate at a temperature of at least 60.degree. C., whereby there is formed a glass having pores impregnated with a solid state laser dye and polymethylmethacrylate.

Abstract: The present invention relates to a process for dyeing or printing organic material, which comprises applying at last one dye selected from those containing a chromophore radical from the monoazo, polyazo, metal complex azo, anthraquinone, phthalocyanine, formazan, azomethine, nitroaryl, dioxazine, phenazine, stilbene, triphenylmethane, xanthene, thioxanthone, naphthoquinone, pyrenequinone or perylenetetracarbamide series which contains an acrylamide, methacrylamide, bromoacrylamide or chloroacrylamide reactive group, at least one colourless cationic compound containing at least one polymerizable double bond, and at least one polymerization initiator and then subjecting it to thermofixation. Further auxiliaries to the organic material may optionally may optionally be included.

Abstract: Particulate adsorbents composed of inorganic oxides impregnated with an indicator dye selected from the group consisting of phenolphthalein, cresol red and thymol blue; a method for the production thereof, and a method for adsorptive drying of neutral gases using the aforementioned particulate adsorbents, whereby the degree of water absorption by the adsorbent particles is indicated by a reversible color change.

Abstract: The invention relates to a process for fixing dyes on organic material, which comprises fixing dyes containing at least one polymerizable double bond or at least one polymerizable ring system, excluding water-soluble dyes which carry acrylamido or methacrylamido groups, together with at least one substantially colorless compound which contains at least one polymerizable double bond, by subjecting said organic material, which has a residual moisture content of less than 20%, based on the treated material, to ionizing radiation.

Abstract: The invention relates to a process for fixing dyes which contain at least one polymerisable double bond and/or at least one polymerisable ring system on moist fibre material using ionising radiation together with at least one colorless compound which contains at least one polymerisable double bond, but not N-C.sub.1 -C.sub.4 alkylolacrylamide or N,N-di(C.sub.1 -C.sub.4 alkylol)acrylamide.

Abstract: Process for dyeing or printing glass fibers, in particular textile glass fibers in various forms, by dyeing or printing the fiber materials with anionic dyes in the presence of cationic compounds following an acid pretreatment. The cationic compounds may be applied to the fiber material before the actual dyeing or printing process or else be applied together with the dye from the same dyeing liquor or printing paste. Suitable cationic compounds are in particular polyquaternized ammonium compounds. Level dyeings are obtained on the glass fiber materials with good light fastness properties.

Abstract: A non-metallic, inorganic surface, such as glass or ceramic is decorated by heat transfer printing a pattern of disperse dyes thereon. A silane primer is applied to the glass or ceramic surface to receive and bond thereto an organic polymeric resin. The disperse dyes are then heat transferred onto and retained by the polymeric resinous layer. Oxidation of the disperse dyes is prevented by applying a seal coat of a protective material such as lacquer, varnish, or clear resin. The sealant and/or polymeric resinous layer are further provided with an ultraviolet absorber. Frosting of the pattern of disperse dyes is achieved by mixing a flatting agent such as silica in the sealant.

Abstract: An ornamental article comprising a natural ornamental material such as pearl and a cured coating membrane of a composition based on organic materials which is coated on the surface of said natural ornamental material in a thickness from 0.01 .mu.m to 30 .mu.m, with improved properties such as surface luster and resistivity to scratch, light, chemicals, etc.

Abstract: A method of manufacturing a homogeneous, water-insoluble dye layer on a substrate is provided in which a solution of a cationic or anionic dye in an organic solvent is provided on the substrate, the solvent is removed and the resulting dye layer is treated with an aqueous solution of a salt in which the cation of the anionic dye is exchanged for the cation of the salt or is treated with a salt or acid in which the anion of the cationic dye is exchanged for the anion of the salt or acid. The invention also provides a substrate provided with water insoluble homogeneous dye layer.

Abstract: Metal-free compounds of the formula, ##STR1## and 1:1 copper complexes of metallizable metal-free compounds of said formula and internal and external salts of metal-free compounds of said formula and of 1:1 copper complexes of metallizable metal-free compounds of said formula, whereineach Q is independently linear or branched C.sub.2-6 alkylene; linear or branched C.sub.2-6 alkylene interrupted by --O--, --S-- or --NR.sub.4 --; linear or branched C.sub.3-6 alkylene monosubstituted or disubstituted by hydroxy or --*NHCO--CH.sub.2 --, wherein the * denotes the atom attached to the --NR.sub.4 -- radical,each R.sub.1 is independently hydrogen, halo, nitro, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, (C.sub.1-4 alkyl)carbonylamino, --SO.sub.2 NR.sub.3 R.sub.4, --CONR.sub.4 --C.sub.6 H.sub.5 or benzamido,R.sub.2 is hydrogen, hydroxy, halo, nitro, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, (C.sub.1-4 alkyl)carbonylamino or --NHCONR.sub.3 R.sub.4,X is --NR.sub.5 R.sub.6 or --N.sup..sym. R.sub.7 R.sub.8 R.sub.9 An.sup..crclbar.

Abstract: A liquid dye composition comprising an organic solvent-soluble premetallized azo dyestuff in a volatile organic solvent medium, said composition further containing a finely divided silica thickening agent and/or xylol, toluol, perchlorethylene or mineral spirits or any mixture thereof. A process for coloring a porous substrate, preferably stone, comprising applying thereto a liquid dye composition comprising an organic solvent-soluble premetallized azo dyestuff in a volatile organic solvent medium, said composition being preferably as described above, and allowing the composition to penetrate the substrate, preferably followed by treating the penetrated substrate with an aqueous solution of a copper salt or a polymerizable organic siliconate, and then removing any excess unpenetrated composition from the substrate.

Abstract: A method of forming a predetermined pattern on a substrate or support. In one embodiment, the method comprises the steps of:(a) providing a laser beam having sufficient power to vaporize a specified pattern-forming material;(b) providing an assembly comprising (i) a substrate which is transparent to the laser and which forms an intimate contact interface with (ii) a smooth layer of the selected pattern-forming material;(c) focusing the laser beam through the substrate at or near the interface of the pattern-forming material; and(d) moving the substrate and the laser beam relative to each other according to the predetermined pattern to selectively deposit the pattern-forming material on the substrate according to the predetermined pattern.

Abstract: The preparation of dye-silane compositions are disclosed. A dye-silane compound is formed in which the dye is covalently bonded to a cyano silane compound. These dye-silane polymer compositions have particular utility as dye adduct reactants in the preparation of dye containing polysiloxanes.

Abstract: A preparation of dye-containing gas permeable silicon polymer and resin compositions are disclosed. Homopolymers and/or co-polymers of polysiloxane are formed in which a photoactive center substituent containing a dye is covalently bonded to the matrix structure thereby rendering the dye non-diffusible. These dye-silicone polymer compositions have particular utility in gas sensing fiber optics devices.

Abstract: Method and apparatus for producing textile yarns so that one surface of the yarn exhibits a visually perceptive darker color hue when compared to another surface of the yarn. The yarn surfaces are coated with a colorant-containing liquid (e.g. a dye- or pigment-containing liquid) and are subsequently dried to effect a drying rate differential between the one and another surfaces to cause the colorants to migrate towards the faster-drying surface to a degree sufficient to achieve the darker color hue thereon. Twisting of the produced yarns during packaging and/or weaving will thus create a woven textile fabric having randomly distributed color variations to achieve a visually pleasing striated, tone-on-tone or heather fabric appearance.

Abstract: A glass substrate is dyed or printed with a water-soluble polycationic dyestuff in the absence of a size or binding agent. The resulting dyeings have good rubbing fastnesses.

Abstract: Immiscible components are controllably released into aqueous systems by impregnating silica-silicate open cell foams with the immiscible components. As the silica-silicate foams are gradually dissolved, the immiscible components are released. Fragrance oils and dyes are particularly adaptable for use in the invention. In fact, silica-silicate foams impregnated with fragrance oils having polar functional groups, exhibit an unexpectedly slower rate of dissolution into aqueous environments and consequently, fragrance oils and dyes admixed therewith are released in aqueous systems over extended time periods.

Abstract: A dye solution for coloring a substrate, especially porous stone, comprising an oxidation base, acetic acid, and about 0.02 to about 0.3 mole, per mole of said oxidation base, of a C.sub.8-16 alkyl benzene sulfonic acid, especially dodecyl benzene sulfonic acid, in a volatile organic solvent medium, and a method of coloring a porous substrate therewith involving post-treatment with an oxidizing agent, especially aqueous hydrogen peroxide of about 1 to about 9 wt. % concentration.

Abstract: A red dye composition comprising the dye compound ##STR1## wherein R.sup.1.spsp..sym. and R.sup.2.spsp..sym. are alkali metal cations or ammonium ions of a lower alkylol amine, and R.sub.3 is hydrogen or lower alkyl, and at least one rhodamine dye.