3550results about How to "High color fastness" patented technology

A method for preparing the tinted contact lens with the covalently bonded novel reactive tinting compound is disclosed. The reactive tinting compound with mono vinyl functionality is prepared by reacting the reactive dye with a hydrophilic monomer containing both pendent hydroxyl and vinyl groups under an alkaline condition. The water soluble reactive dyes containing either difluoro-chloropyrimidine or β-sulphatoethylsulphone reactive groups are used for synthesis of the reactive tinting dye. The lens forming materials are photo-polymerized in the presence of the reactive tinting compound to prepare a tinted contact lens. The reactive tinting compound is copolymerized with the lens forming monomers in a single photo-polymerization step that requires no subsequently alkaline soaking or developing step as used in the prior art. In addition, the covalently bonded dye is stable and durable in the lens and does not fade or leach out after multiple high-pressure thermal sterilizations.

The invention discloses environmentally-friendly acrylic ester coating printing adhesive emulsion and a preparation method. An emulsion polymerization process is adopted. The emulsion comprises the following raw materials in part by weight: 50 to 90 parts of soft monomer, 10 to 20 parts of hard monomer, 2 to 10 parts of functional monomer, 2 to 5 parts of emulsifying agent, 0.2 to 0.5 part of initiator, 0.2 to 0.5 part of pH buffer, 80 to 120 parts of deionized water and a proper amount of pH adjustor, wherein the total amount of the soft monomer, the hard monomer and the functional monomer is 100 parts by weight. The three monomers are cooperatively used as functional monomers for generating carboxyl crosslinking, hydroxy crosslinking, epoxy crosslinking and the like so that the obtained printing adhesive emulsion has excellent water tolerance and mechanical property. The crosslinking monomers and the emulsifying agent do not contain the components such as N-methylol acrylamide, APEO and the like, so the emulsion does not release formaldehyde during baking and using and is suitable for high-grade environmentally-friendly printing adhesive.

The invention discloses an alkali-resistant disperse dye complex, and relates to disperse blue BR-based alkali-resistant disperse dye complexes suitable for dyeing in a wide pH range. The complex comprises (1) alkali-resistant disperse dye blue complex, or (2) alkali-resistant disperse dye blue complex, or (3) alkali-resistant disperse dye black complex. The disperse dye complex of the invention has good dispersibility, dyeing stability and good reproducibility, and can effectively avoid the problems of stains, flaws, chromatic aberration and the like caused by dirt such as slurry, oil stain,wax and the like on fibers; and the pH value has wide range during use, dyeing can be performed in the pH range of 4.0 to 11.25, the dyed fabrics have full hue, and the dyed fabrics with predominant color fastness performance such as washing fatness, daylight fastness and the like can be obtained without reduction clearing.

The present invention relates to a kind of disazo dyestuffs composition, the described composite active blank dyestuff mainly contains four dyestuffs, said invention also provides their structure formulas. The described composite dyestuff is suitable for dyeing dark colour fabrics, such as cellulose fibre, cotton fibre and synthetic fibre, etc., and has good level-dyeing property, repeatability, high dyeing fastness, fastness to washing and wet rubbing fastness.

Tea polyphenol obtained by the extraction from tea has an antibacterial effect. In methods for producing an antibacterial fiber by fixing the tea polyphenol to fiber, the object of the present invention is to provide a process for manufacturing an antibacterial fiber capable of exerting an excellent antibacterial performance without the use of metal chelates potentially causing metal allergy and environmental problems. In order to achieve the above object, the present invention manufactures an antibacterial fiber by a process comprising the steps of contacting fiber with or immersing fiber in an aqueous solution in which a cationic surfactant with a quaternary ammonium salt group, a water-soluble protein, and an alkaline compound are dissolved; and separating said fiber from the aqueous solution, to immerse the fiber in another aqueous solution containing tea polyphenol.

The invention relates to a high temperature high pressure bulking dyeing method which comprises dyeing and after treatment. By adoption of the dyeing method of the invention, fibers or textile fabrics like aramid fibers, polysulfonamide fibers, polyphenylene sulfides, polybenzimidazole, poly-p-phenylene benzobisoxazole fibers, phenol formaldehyde resins, fibrilia and so on which have high crystallinity and high orientation degree or high glass transformation temperature can be dyed, and fibers after dyeing have the advantages of evenness, bright colors, high dyefastness, improvement of light fastness and little impact on physical properties.

The invention provides a method for preparing a natural dye mordanting dyeing or mordanting printing product. The preparation method comprises the steps of performing pretreatment on a fabric, using cation modified working solution to perform cation modification on the fabric, and obtaining cation-modified fabric; using natural dye to dye the cation-modified fabric and obtaining a natural dye dyeing fabric; using a mordant working solution or mordant working solution foam to perform mordanting dyeing or mordanting printing on the natural dye dyeing fabric at a predetermined area, performing steaming or baking at 80-180 DEG C for 10 s to 25 min, performing washing, softening and shaping, and obtaining the natural dye mordanting dyeing or mordanting printing product. The invention further provides the natural dye mordanting dyeing or mordanting printing product obtained according to the preparation method. The natural dye mordanting dyeing or mordanting printing product obtained according to the preparation method is good in color fastness and uniform in base color, the printing part is dark in color, the material loss is less, and a fabric is softer.

The invention discloses a dyeing and finishing method of superfine denier nylon fabric, belongs to the field of processing on the superfine denier nylon fabric, and aims at solving the problems that dyeing defect and uneven dyeing of the superfine denier nylon fabric are easily generated in the dyeing process. The method disclosed by the invention comprises the steps of: cold heaping, open-width desizing, pre-setting, dyeing, performing fixation, baking and molding a finished product. An anionic leveling agent disclosed by the invention has affinity on nylon, and can generate an unexpectedly dyeing effect on the fiber together with anionic dye. Thus, the initial dyeing speed of the dye is reduced, so as to achieve a uniform dyeing effect; and the fold resistance of the fabric is improved when the craping style of the fabric is kept by presetting the desized fabric. By using the dyeing and finishing method, the dyeing process is even, the color and the luster are good, the colour fastness is good, and the like; and the dyeing defect can not be generated, and the fabric processed by using the method accords with the requirements of superior products specified by the standard of GB / T17253-2008 'synthetic filament yarn fabric'.