The restorer "roncola" for vat dyes

 

(57) Abstract:

The inventive restorer "Roncola" contains Oxymetazoline sodium - 27-30%, hydroxy - or hydroxyethylidenediphosphonic acid - 1,0-1,2%, unlikely sodium - 6,0-7,0%, carboxymethylcellulose - 2,0-2,5% and water up to 100%. The restorer "Roncola" has a high heat resistance and stability of the redox potential. table 2.

The invention relates to the field of chemical technology of fibrous materials and can be used for recovery of VAT dyes in the process of coloring textile materials.

For recovery of VAT dyes in dyeing and printing use of inorganic and organic derivatives of sulfoxide acid. Representative first is dithionite sodium. Inorganic derivatives sulfoxylates acid used in dyeing and manufactured under the trademarks: hydrosulfite (USSR, Germany), hydrosulfite F (FRG). Dithionite and its analogs are characterized by low resistance to oxidation in the solid state and especially in aqueous solutions. Therefore, in actual dyeing consumption hydrosulfite 2-3 times higher than theoretically nanowires.

Organic derivatives sulfoxylates acids are divided into two large subgroups of hydroxyalkyl and hydroxyarylalkyl and products of their condensation with ammonia or amines. They are available with trademarks Rongalit, Rontex, DTM (thiourea dioxide) (USSR), Regal PS, Regal NT, Rongalit With, Rongalit DS, Rongalit KD, Rongalit DP, Rongalit RN, Rongalit Hfluidly.. All of them except Rongalite N and Ranexa solid powder products containing a basic substance in an amount of not less than 68% and by-products, resulting in the synthesis of the reducing agent and its decomposition during evaporation and drying. Such byproducts are bisulfite formaldehyde sodium or calcium, or zinc and the corresponding sulfates and sulfites. Depending on temperature, pH and other conditions of the recovery process of industrially produced organic derivatives sulfoxylates acid used in the process or dyeing (FCN, Regal PS, Regal NT), or for direct printing (rongalite-potash, two-phase methods), or mordant and back print (Rongalit, Rongalit With, Rongalit FD, Rongalit DS, Rongalit DP, Rongalit RN, Rongalit Hfluidly.[1]

The main disadvantage of this group in the definition of the processes leads to the decomposition of the reducing agent when drying fabric, their deactivation and lower reduction potential in the treatment of printed fabrics in the recovery silnika. As a result, reduced the quality of the coloring.

Known restorer "ROTEX" [2] represents a composition containing (wt.):

rongalit 100% 22-25

caustic soda 100% 7-9

gidroksietilirovanny acid 0,8-0,9

sodium silicate 4,1-4,7 water

100

Using "Ranexa" as a reducing agent can significantly reduce the consumption of rongalite, to exclude the operation of its cooking on hinstance print shops. This contributes to the improvement of sanitary and hygienic conditions in krasovkah print shops, as when cooking Rongalite was release into the atmosphere of carcinogenic formaldehyde.

However, the drug Rontex has insufficient stability of the redox potential when heated, resulting in reduced output of the dye on the fiber and deterioration of color indices colors.

Thus, none of the known reducing agents used in the printing kovovymi dyes, does not possess at the same time sufficient thermal stability and tagamou VAT dyes.

Inventive task consisted in finding the composition of the reducing agent, provides both the stability of redox potentila and high thermal stability ensures high-quality printing kovovymi dyes of any structure.

The problem is solved by the composition of the reductant "Roncola" on the basis of Oxymetazoline sodium, including derivative etilgeksanovoj acid, alkaline agent and water, which further comprises carboxymethylcellulose, as derived ethylidenediphosphonic acid it contains hydroxy or hydroxy, and as the alkaline agent is sodium carbonate with the following content of components (wt.):

Oxymetazoline sodium 27-30

hydroxy - or hydroxyethylidenediphosphonic acid 1,0-1,2

sodium carbonate 6,0-7,0

carboxymethylcellulose 2.0 to 2.5

water to 100

The restorer "Roncola" has the following advantages. The extract solution of the drug at 100oC for 1 h results in the decrease of redox potential with up to 980 990 mV, while in the same conditions for the preparation Rontex" this fall is from 1500 to 960 mV. Restore aziklicescimi, containing and halogen-free.

The drug Roncola" receive, for example, as follows. In enameled steel apparatus, equipped with a stirrer, load the solution of Oxymetazoline and add the remaining ingredients and stirred for 90-120 minutes at the heating system 20 to 50-55oC. the mixture is Then directed to the process of evaporation to the desired concentration of Oxymetazoline. Evaporation is carried out at a temperature of 55-60oC and a vacuum of 0.8 to 0.9 kgf/cm2with constant stirring. Control of evaporation lead quantity in the receiver distilled water, which are determined by calculation depending on the initial concentration of Oxymetazoline.

In table.1 shows examples of compositions Roncola" with different quantitative content components and properties of these compounds. The redox potential was determined at a temperature of 100oWith time on the universal ionomer EV-74 with silver chloride and platinum electrodes. Thermal stability was determined by the change in the content of the basic substance by dissolving the sample and determine the solution of formaldehydeinduced method iodometric titration. Use "Roncola" in peerzada as reductants "Rontex and Roncola", and indicators of the quality of printing. The intensity and saturation of the colors was determined through the function Kubelka-Munch. TTT

The reducing agent for VAT dyes containing Oxymetazoline sodium, derived ethylidenediphosphonic acid, alkaline agent and water, wherein as derived ethylidenediphosphonic acid it contains its hydroxy or hydroxy, as the alkaline agent is sodium carbonate and further comprises carboxymethylcellulose at the following content, wt.

Oxymetazoline sodium 27-30

Hydroxy - or hydroxyethylidenediphosphonic acid 1,0-1,2

Sodium carbonate 6,0-7,0

Carboxymethylcellulose 2.0 to 2.5

Water The Rest

 

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< / BR>
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