摘要:
Glycol ether benzoates, glycol benzoates and methyl benzoate facilitate the dyeing of the meta-aramid article, e.g., fibers, at or near neutral pH. The addition of an anionic surfactant, such as sodium lauryl sulfate, enhances the performance of the benzoates.
摘要:
Glycol ether benzoates, glycol benzoates and methyl benzoate facilitate the dyeing of the meta-aramid article, e.g., fibers, at or near neutral pH. The addition of an anionic surfactant, such as sodium lauryl sulfate, enhances the performance of the benzoates.
摘要:
There is described a process for the preparation of highly concentrated aqueous solutions of specific cationic azo dyes. The solutions are prepared by diazotising a diazo component in a solution which contains sulfuric acid, coupling the diazotised component to a coupling component, treating the resultant azo dye with a bicarbonate, and converting the dye bicarbonate with an organic acid into the dye salt of said acid.
摘要:
Stable solutions of azo dyes obtained by diazotizing and coupling m-phenylenediamine or derivatives thereof are prepared after the reaction has ended by treating the resulting reaction mixture with from 0.1 to 1.2 moles of formic acid, based on 1 mole of m-phenylenediamine, at from 60.degree. C. to the boiling point of the reaction mixture.
摘要:
There is provided hereby a coloring composition having an excellent water resistance and solution stability, which comprises a reaction mixture of(a) a vinyl compound soluble in water or in a water soluble organic solvent, with(b) a compound which contains more than two groups having a active hydrogen, at least one group of which is an amino group or imino group,in the presence of a water soluble dye and optionally a solvent.
摘要:
Bleed-fast, dyes cellulosics particularly absorbent papers have been obtained with a particular class of water-soluble, cationic dyes reacted with a water-soluble aldehyde, preferably formaldehyde, glyoxal or glutaraldehyde. An aqueous printing fluid containing the water-soluble cationic dye and the aldehyde, upon drying, produces a water-resistant dyestuff having improved bleed fastness upon cellulosic fibers.
摘要:
The present invention provides concentrated aqueous acid solutions of the colorant having the formula: ##STR1## in which A.sup..crclbar. represents the formate, acetate or propionate anion. The solutions are prepared starting with the corresponding chloride or sulfomethylate by forming the m- or p-nitrobenzoate, dissolving said salt in formic, acetic or propionic acid and eliminating the nitrobenzoic acid which is precipitated. The solutions of the invention can be used for coloring and printing fibers containing acid groups, and particularly acrylic fibers.
摘要:
Solution of ethylauramine hydrochloride in thiodiglycol; process for the preparation of such a solution in which dry ethylauramine hydrochloride, without water of crystallisation, is dissolved in thiodiglycol and process of colouration in which the colouring agent is such a solution.
摘要:
Trinuclear dyes derived from the rhodanine nucleus are made soluble in low-molecular weight alcohols by the addition of a substituent to the nitrogen atom of the rhodanine central nucleus.
摘要:
THE DYE SOLUTION COMPRISES (1) AT LEAST ONE CATIONIC DYE, (2) PHOSPHORIC ACID OR AN ACIDIC PHOSPHORIC ACID ESTER AND (3) AT LEAST ONE WATER-SOLUBLE ORGANIC SOLVENT. THE SOLVENT IS A POLYOL OF THE FORMULA:
HO.R(G.R'')N.OH
WHEREIN R AND R'' DENOTE AN ALKYLENE GROUP HAVING 2 TO 3 CARBON ATOMS OR A 2-OXY-PROPYL GROUP, N DENOTES AN INTERGER WHICH IS ZERO TO 2 AND G DENOTES AN OXYGEN ATOM. WHEN N IS 1, G MAY ALSO BE A SULPHUR ATOM, A SULPHONYL GROUP OR A >N$COH GROUP; A LOWER ALKYL ETHER OF SAID POLYOL; DIMETHYL SULPHOXIDE; OR DIMETHYL FORMAMIDE.