Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
  • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
  • D06P1/02—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using azo dyes
  • D06P1/12—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using azo dyes prepared in situ
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
  • D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
  • D06P3/58—Material containing hydroxyl groups
  • D06P3/60—Natural or regenerated cellulose
  • D06P3/68—Preparing azo dyes on the material

Definitions

• the invention is in the technical field of development dyes (ice dye technology).
• Liquid preparations of arylamines serving as diazo components have long been used in ice dyeing. They have great advantages over the previously used solid (powdery) preparations; they do not dust and can be diazotized very easily and without residue.
• solid (powdery) preparations there are certain disadvantages for these liquid preparations, since some of them contain large amounts of auxiliaries and the solvents used are ecologically questionable. Such preparations can also tend to crystallize at low temperatures. Preparations which have such disadvantages are, for example, from German Offenlegungsschriften Nrs. 25 52 711 and 26 40 138 and known from US-PS 4,368,054.
• the preparations according to the invention preferably contain the halogen-containing aniline compound in an amount of 30 to 70% by weight, preferably 35 to 65% by weight.
• the preparations can contain small amounts (usually up to a total of 5% by weight) of conventional additives and admixtures, such as preservatives (mold-preventing agents) and moisture.
• Propylene glycol contained in the dyeing preparations according to the invention is preferably 1,2-propylene glycol.
• Polyalkylene glycols are, for example, diethylene glycol, triethylene glycol and tetraethylene glycol, preferably diethylene glycol and triethylene glycol.
• Examples of such compounds are 2-chloroaniline, 3-chloro-aniline, 2,5-dichloro-aniline, 3-chloro-2-methyl-aniline, 5-chloro-2-methyl-aniline, 5-chloro-2-methoxy aniline, 4-chloro-2-methyl-aniline, 2-amino-4-chloro-diphenyl ether and 2-amino-4,4'-dichloro-diphenyl ether.
• the dyeing preparations according to the invention can usually be prepared by stirring the components, if appropriate with gentle heating.
• the preparations can preferably be used in ice-dyeing to produce water-insoluble azo dyes on the fiber, the diazo component (aniline compound) dissolved in these preparations being converted into the diazonium salt by diazotization.
• the invention accordingly also relates to the use of the preparations according to the invention in ice dyeing for dyeing fiber materials, preferably cellulose fiber materials. This can be done, for example, analogously per se and in practice in ice color technology, by stirring the preparation in dilute hydrochloric acid and then rapidly adding an aqueous sodium nitrite solution while stirring.
• the diazotization is completed in a very short time, usually within a few seconds.
• the dilute hydrochloric acid can have a temperature up to about 25 ° C.
• the preparations according to the invention can usually be prepared the existing tap water can be used without cooling or adding ice.
• the stirring in the preparation of the diazonium solution from the preparation is usually carried out by a stirring motor.
• the diazonium salt solutions obtained in the diazotization of the preparations according to the invention are residue-free and of a light and clear consistency.
• To convert the preparations according to the invention into the diazonium salt solutions only a little more than the theoretical amount of sodium nitrite is required, and clear, transparent solutions are obtained which are stable even after prolonged standing and show no cloudiness.
• the preparations according to the invention are viscous solutions which, despite their viscosity, are easy and safe to handle. They are significantly less viscous than the liquid preparations described in the above-mentioned German Offenlegungsschriften 25 52 711 and 26 40 138 and US Pat. No. 4,368,054.
• Both the preparations according to the invention and the diazonium salt solutions obtainable therefrom are lighter and clearer than the mentioned preparations and the diazonium salt solutions obtainable therefrom in the prior art and do not show any clouding or flocculation even after prolonged standing.
• the solvents and auxiliaries contained in the preparations according to the invention are readily or very readily biodegradable.
• a diazonium salt solution can be prepared in a corresponding manner, as outlined in Example 1b); a clear, residue-free diazonium salt solution is obtained.
• 560 parts of 5-chloro-2-methyl-aniline are at about 20 ° C in a mixture of 320 parts of 1,2-propylene glycol and 120 parts of a reaction product 1 mole of castor oil and 36 moles of ethylene oxide.
• a clear, colorless liquid is obtained.
• the preparation can be diazotized analogously to the information in Example 1b); the aqueous diazonium salt solution obtained is clear and residue-free and shows no flocculation even after prolonged standing.
• a pre-wetted package with 500 parts of cotton yarn is first treated in a dyeing machine with 5000 parts of a priming liquor of about 20 ° C. for 30 minutes, the 18 parts of 2-hydroxy-naphthalene-3-carboxylic acid 4'-chlorophenylamide, 50 parts of a 32% Contains aqueous sodium hydroxide solution, 10 parts of a 30% aqueous formaldehyde solution and 12.5 parts of a commercially available fatty acid protein degradation product condensate.
• a development liquor is prepared which contains, in 5000 parts of water, a diazonium salt solution prepared analogously to that of Example 1b) from 25 parts of the preparation of Example 4 and 55 parts of sodium acetate trihydrate. This development liquor is passed through the cheese for 30 minutes at a temperature between 10 and 20 ° C pumped.
• the dyeing obtained is then completed in the customary manner by rinsing with water and by treatment in an aqueous bath containing a nonionic detergent at a temperature between 60 and 100 ° C. and by rinsing again with water and drying.
• a deep scarlet color with the known very good fastness properties is obtained.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Coloring (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6473305

Family Applications (1)

Country Status (4)

Citations (2)

• 1993
  • 1993-11-12 EP EP93118384A patent/EP0600288A1/fr not_active Withdrawn
  • 1993-11-17 JP JP5288425A patent/JPH07300778A/ja not_active Withdrawn
  • 1993-11-19 BR BR9304772A patent/BR9304772A/pt not_active Application Discontinuation
  • 1993-11-19 KR KR1019930024770A patent/KR940011590A/ko not_active Application Discontinuation

Patent Citations (2)

Also Published As

Similar Documents

Legal Events