DE212017000349U1 - Modified tamarind gum printing paste - Google Patents

Abstract

Modified tamarind gum printing paste with the following raw materials according to the specified parts by weight: Tamarind gum 100 parts; Depolymerization agents 0.1-0.5 parts; Etherifying agents 5-50 parts; catalyst 3-10 parts; water 60-150 parts.

Description

TECHNICAL AREA

The present invention belongs to the technical field of textile printing paste and relates to a modified tamarind gum printing paste.

BACKGROUND

Printing pastes have high molecular weight compounds that have a thickening effect when they are placed in a printing rubber. At present, the naturally modified paste mainly used in the market mainly includes sodium alginate, modified starch, modified cellulose, a modified guar gum, a modified tamarind gum and the like.

The tamarind, also called tamarind pulp or tamarind fruit, is a tall, evergreen arbor native to Africa and widespread in tropical and subtropical regions, with large yields in India and Thailand. There are large deposits of tamarind in the Yunnan region of China.

Tamarind gum, also known as tamarind kernel powder (TKP), is an off-white powder made from tamarind seeds. The main component of tamarind gum is tamarind seed polysaccharide (TSP) with a proportion of more than 65%. The TSP is a xyloglucan that belongs to hemicellulose. The main chain of its molecular structure is β-D-1,4-linked glucose, and the side chains are α-D-1,6-linked xylose and β-D-1,2-linked galactose.

Tamarind gum has a wide range of inventions in medicine and the food industry. In India the tamarind gum was already used as medicine. The tamarind gum is easy to disperse in cold water and dissolve by heating and has a high viscosity. It can be used as a thickening and stabilizing agent for food and also as an adhesive for paper (Anon, 1976). The tamarind gum can also be used as a thickening agent for printing and coloring in the textile industry (Khoja and Holbe, 2001).

CN102978971A discloses a printing paste for a disperse dye. This printing paste is formed by combining a hydroxyethyl modified tamarind gum, sodium carboxymethyl cellulose, a konjak gum, sodium hexametaphosphate, anhydrous sodium sulfate and sodium dihydrogen phosphate. Specifically, the printing paste is produced by compounding 60-70 parts of a hydroxyethyl-modified tamarind gum, 3-8 parts of sodium carboxymethyl cellulose, 2-10 parts of a konjak gum, 5-10 parts of sodium hexametaphosphate, 15-20 parts of anhydrous sodium sulfate and 1-2 parts of sodium dihydrogen phosphate. The raw materials are pulverized to 30 mesh in accordance with their consumption amount and stirred and mixed at room temperature while adding a preservative to prepare the printing paste. This invention shows a process for making a hydroxyethyl modified tamarind gum in a solvent process, but does not disclose any degree or range of substitution. The printing and coloring effect must be further improved so that this printing paste can be used for printing and coloring.

CN107142750A discloses a manufacturing method for a composite printing paste for a disperse dye comprises the following steps: (1) pumping mixed solvents into a reaction kettle, sequentially adding starch and tamarind gum to the reaction kettle under protection of nitrogen, stirring and dispersing uniformly, and preparing a 40 % suspension; (2) continuously adding a 48% alkali solution dropwise to the reaction kettle, adding ethyl alcohol to the bulk of the alkali solution at a mass percentage of 95% at a temperature of 25 ° C-30 ° C, and stirring for 0.5-1 hour; (3) uniform addition of solid sodium chloroacetate to the reaction kettle, slowly heating the temperature to 55 ° C-60 ° C and holding the reaction at this temperature for 2-3 hours; (4) Weigh out sodium carboxymethyl cellulose (CMC) having a degree of substitution of 1.0-1.2 and a viscosity of 1000-2000 mPas, and add the CMC to the reaction kettle with stirring to disperse evenly; Cooling to 40 ° C-45 ° C, adding a crosslinking agent, performing a crosslinking reaction for 1-2 h; (5) after completion of the reaction, adjusting the pH to neutral by means of hydrochloric acid or acetic acid, centrifuging, washing using ethyl alcohol having a mass percentage of 88%, drying and pulverizing to obtain the base material; and (6) compounding 0.5% -2% bentonite in the base material to form a composite paste for printing with a disperse dye to obtain. The composite printing paste of the invention is a composite printing paste for printing with a disperse dye, which has a high paste-forming rate and good storage stability. The starch and the tamarind gum of the composite printing paste described are subjected to a carboxymethylation modification in order to improve the rheological properties of the composite printing paste, to adjust the printing viscosity index (PVI) of the composite printing paste and to adjust the thermal stability of the composite printing paste so that the composite printing paste is suitable for the high-temperature fixing process (170 ° C-190 ° C) in dispersion printing. However, the cost of the materials used in this invention and the control requirement for the experimental condition are high, and the preparation process is complex. In order for the composite printing paste to be used in the printing process, its printing and coloring effect must be further improved.

SHORT SUMMARY

On the one hand, the present invention is based on the object of providing a modified tamarind gum printing paste with regard to the deficiencies indicated in the prior art, which has a molar degree of substitution of hydroxyethyl of 0.1-0.3 and enables a high color yield during printing.

The following technical solutions are used to achieve the object of the present application.

A modified tamarind gum printing paste is provided, which comprises the following raw materials in the stated parts by weight: Tamarind gum 100 parts; Depolymerization agents 0.1-0.5 parts; Etherifying agents 5-50 parts; catalyst 3-10 parts; water 60-150 parts.

In the present invention, a hydroxyethyl modified tamarind gum printing paste having a molar degree of substitution of hydroxyethyl of 0.1-0.3 is prepared. It is produced by etherification with an etherification agent under the action of a depolymerization agent and a catalyst, a tamarind gum being used as the raw material and water as the solvent.

• 100 Teile eines Tamarindengummis;
• 0,1-0,5 Teile eines Depolymerisationsmittels, wobei z.B. die Gewichtsteile des Depolymerisationsmittels 0,1 Teile, 0,2 Teile, 0,3 Teile, 0,4 Teile, 0,5 Teile betragen;
• 5-50 Teile eines Veretherungsmittels, wobei z.B. die Gewichtsteile des Veretherungsmittels 5 Teile, 10 Teile, 15 Teile, 20 Teile, 25 Teile, 30 Teile, 35 Teile, 40 Teile, 45 Teile, 50 Teile betragen;
• 3-10 Teile eines Katalysators, wobei z.B. die Gewichtsteile des Katalysators 3 Teile, 4 Teile, 5 Teile, 6 Teile, 7 Teile, 8 Teile, 9 Teile, 10 Teile betragen;
• 60-150 Teile Wasser, wobei z.B. die Gewichtsanteile des Wassers 60 Teile, 70 Teile, 80 Teile, 90 Teile, 100 Teile, 110 Teile, 120 Teile, 130 Teile, 140 Teile, 150 Teile betragen.

The modified tamarind gum printing paste on which the invention is based comprises the following raw materials in the parts by weight mentioned:

• 100 parts of a tamarind gum;
• 0.1-0.5 parts of a depolymerizing agent, for example the parts by weight of the depolymerizing agent being 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part;
• 5-50 parts of an etherifying agent, for example the parts by weight of the etherifying agent being 5 parts, 10 parts, 15 parts, 20 parts, 25 parts, 30 parts, 35 parts, 40 parts, 45 parts, 50 parts;
• 3-10 parts of a catalyst, for example, parts by weight of the catalyst being 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts;
• 60-150 parts of water, for example the weight fractions of the water being 60 parts, 70 parts, 80 parts, 90 parts, 100 parts, 110 parts, 120 parts, 130 parts, 140 parts, 150 parts.

Further, the modified tamarind gum printing paste of the present invention comprises the following raw materials according to the listed parts by weight: Tamarind gum 100 parts; Depol ymerizing agent 0.2-0.4 parts; Etherifying agents 10-30 parts; catalyst 5-8 parts; water 60-150 parts.

In addition, the depolymerization agent is one or a mixture of at least two of the agents: hydrogen peroxide, sodium persulfate and ammonium persulfate. Typical and non-limiting combinations of the mixture are a mixture of hydrogen peroxide and sodium persulfate, a mixture of hydrogen peroxide and ammonium persulfate, a mixture of sodium persulfate and ammonium persulfate, a mixture of hydrogen peroxide, sodium persulfate and ammonium persulfate.

Furthermore, the etherifying agent is ethylene oxide.

In addition, the catalyst is sodium hydroxide or potassium hydroxide.

• Die modifizierte Tamarindengummi-Druckpaste der vorliegenden Erfindung verwendet Wasser als Lösungsmittel, wodurch die Produktionskosten und die Umweltbelastung stark reduziert wird; und die Menge des verwendeten Veretherungsmittels ist gering, wodurch gleichzeitig die Anforderungen an die Reaktionsbedingungen verringert werden.

Compared to the existing prior art, the present invention has the following advantages:

• The modified tamarind gum printing paste of the present invention uses water as a solvent, which greatly reduces the production cost and the environmental impact; and the amount of the etherifying agent used is small, which at the same time reduces the requirements for the reaction conditions.

The modified tamarind gum printing paste has a low molar degree of substitution of hydroxyethyl at 0.1-0.3 and a high viscosity, the viscosity of the modified tamarind gum printing paste solution being over 13,000 cp at a mass concentration of 9% at 25 ° C. The modified tamarind gum printing paste is beneficial for textile printing as well as textile dyeing. This enables a high color yield for end products in the invention in the printing process and, moreover, this can be largely used in the dyeing process of disperse dyes.

Figure list

• 1 den Graphen einer H-NMR eines aus dem Stand der Technik bekannten Tamarindengummis;
• 2 den Graphen einer H-NMR einer modifizierten Tamarindengummi-Druckpaste gemäß Beispiel 1 der vorliegenden Erfindung.

Show it:

• 1 the graph of an H-NMR of a tamarind gum known from the prior art;
• 2 is a graph of H-NMR of a modified tamarind gum printing paste according to Example 1 of the present invention.

DETAILED DESCRIPTION

The solutions of the present invention are illustrated below by specific embodiments in connection with the 1 and 2 described in more detail.

A modified tamarind gum printing paste of the invention comprises the following raw materials in the stated parts by weight: Tamarind gum 100 parts; Depolymerization agents 0.1-0.5 parts; Etherifying agents 5-50 parts; catalyst 3-10 parts; water 60-150 parts.

The manufacturing process for the modified tamarind gum printing paste of the present invention comprises (indicating parts by weight): mixing 100 parts of a tamarind gum with 60-150 parts of water, adding 0.1-0.5 parts of a depolymerizing agent, 5-50 Parts of an etherifying agent and 3-10 parts of a catalyst for carrying out a reaction to produce a modified tamarind gum printing paste.

• 75D-Chiffondruckverfahren: Zubereitung der Rohpaste → Zubereitung der Farbpaste → Drucken (Magnetstab-Kleinmuster-Druckmaschine) → Trocknen → Dämpfen und Farbfixieren (6 min bei 176°C) → Reduzieren und Reinigen (85°C, 2 g/L flüssiges Natriumhydroxid, 2 g/L Natriumhyposulfit) → Trocknen und Veredeln des Drucks.

When the modified tamarind gum printing paste of the present invention is used in the printing process, the flow of the printing process is as follows:

• 75D chiffon printing process: preparation of the raw paste → preparation of the color paste → printing (magnetic bar small sample printing machine) → drying → steaming and color fixing (6 min at 176 ° C) → reducing and cleaning (85 ° C, 2 g / L liquid sodium hydroxide, 2 g / L sodium hyposulfite) → drying and finishing of the print.

example 1

The manufacturing method of the modified tamarind gum printing paste in this example is shown below.

100 grams of tamarind gum was weighed and mixed with 90 grams of water. 0.2 g hydrogen peroxide and 8 g sodium hydroxide were added. The mixture was stirred for 15 minutes and then heated to 70 ° C. Then 30 g of ethylene oxide was added dropwise over one hour. After the mixture was kept at 70 ° C. for 1 hour, it was cooled to room temperature and neutralized to pH 7 by adding glacial acetic acid. The neutralized mixture was vacuum dried and pulverized to obtain a hydroxyethyl tamarind gum paste having a viscosity of 14,000 cp at 25 ° C. in a 9% solution (Brookfield viscometer, 30 rpm).

According to the method of the printing process described above, the modified tamarind gum printing paste prepared in this example was used in the printing process and its printing performance was examined. The results are shown in Table 1.

The H-NMR of the raw material used, the tamarind gum, is in 1 and the H-NMR of the modified tamarind gum printing paste prepared in the present invention is shown in FIG 2 shown. Compared to 1 available in 2 a clear characteristic peak at about 9.8 ppm, indicating that hydroxyethyl has been substituted in the molecular chain of the tamarind gum.

Examples 2-5

According to the production process of Example 1, hydroxyethyl tamarind gum pastes with different viscosities were obtained by changing the raw material proportions. The raw materials and test conditions are shown in Table 2.

According to the method of the printing process described above, the modified tamarind gum printing pastes prepared in Examples 2-5 were used in the printing process and their printing performance was examined. The results are shown in Table 1.

Comparative example

The commercially available CMT-8 printing paste was used as a comparative example. The CMT-8 printing paste is a carboxymethyl tamarind gum paste. The printing process is the same as the printing process in Example 1. The printing performance was also examined and the results are shown in Table 1. Table 1 Test task example 1 Example 2 Example 3 Example 4 Example 5 Compare the example Viscosity (30 rpm / cp) 14000 13000 17000 15000 14500 14000 Color yield High High High High High normal accuracy Well Well Well Well Well normal Permeability Well Well Well Well Well Well Capillary effect test - warpage (cm) 5.9 5.6 5.9 6.0 5.9 5.9 Capillary effect test - shot (cm) 5.9 5.6 5.9 6.0 5.7 5.9 HD black Stable Stable Stable Stable Stable Stable HGL navy blue Stable Stable Stable Stable Stable Stable S-5BL ruby red Stable Stable Stable Stable Stable Stable Table 2 Raw material Example 2 Example 3 Example 4 Example 5 Tamarind chewing gum (g) 100 100 100 100 Hydrogen peroxide (g) 0.2 0.1 0.3 0.2 Sodium hydroxide (g) 8th 7th 9 7th Ethylene oxide (g) 28 26th 32 30th The modified tamarind gum printing paste of the present invention uses water as a solvent, which greatly reduces the production cost and the environmental impact. The amount of the etherifying agent used is small, which at the same time reduces the requirements on the reaction conditions. The modified tamarind gum printing paste of the present invention has a low molar degree of substitution of hydroxyethyl at 0.1-0.3, and a high viscosity, with the viscosity of the modified tamarind gum printing paste solution having a mass concentration of 9% at 25 ° C being above 13,000 cp lies. The modified tamarind gum printing paste is beneficial for printing and dyeing textiles and has a high color yield for finished products when used in the printing process. The final products obtained after printing have good accuracy and high permeability, the color is stably retained after printing. The modified tamarind gum printing paste performs well in the capillary effect test and can be used in the dyeing process of disperse dyes under various conditions.

The aforementioned embodiments are only intended to illustrate the detailed methods of the present invention. The present invention is not limited to the methods illustrated; the implementation of the present invention need not be based on the methods mentioned above. It is obvious to those skilled in the art that all improvements made to the present invention, equivalent substitution of raw materials of the product of the present invention, additions of excipients in the product of the present invention and the selection of specific methods, etc., within the scope and the disclosed scope of the present invention fall.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• CN 102978971 A [0006]
• CN 107142750 A [0007]

Claims (5)

Modified tamarind gum printing paste with the following raw materials according to the specified parts by weight: Tamarind gum 100 parts; Depolymerization agents 0.1-0.5 parts; Etherifying agents 5-50 parts; catalyst 3-10 parts; water 60-150 parts. Tamarind gum printing paste Claim 1 with the following raw materials according to the specified parts by weight: Tamarind gum 100 parts; Depolymerization agents 0.2-0.4 parts; Etherifying agents 10-30 parts; catalyst 5-8 parts; water 60-150 parts. Tamarind gum printing paste Claim 1 or 2 wherein the depolymerization agent comprises one or a mixture of at least two of the following agents: hydrogen peroxide, sodium persulfate and ammonium persulfate. A tamarind gum printing paste according to any preceding claim, wherein the etherifying agent is ethylene oxide. Tamarind gum printing paste according to any one of the preceding claims, wherein the catalyst is sodium hydroxide or potassium hydroxide.

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