JPS59173120A - Dissolving method of tamarind seed powder - Google Patents

Abstract

PURPOSE:To dissolve and to make tamarind seed powder pasty in water even at ordinary temp. by stirring the tamarind seed powder in water in the presence of ureas. CONSTITUTION:Tamarind seed powder is stirred in water at ordinary temp. in the presence of urea and/or thiourea. The quantity of ureas is 6pts.wt. fasing on 100pts.wt. water and >=10pts.wt. is especially preferable. As for the blending quantity of said powder, there is no limitation, and it can be selected adequately according to the desired viscosity of the pasty liquid and the uses. The pasty liquid of 5% said powder obtd. by this method, is a light brown, opaque liquid having excellent fluidity and has more superior water-holding property and viscosity than that of the pasty liquid obtd. by heating and dissolving said powder in water and very useful as thickening and water holding agents of textile printing agents and sizing liquids and binders of granular fertilizers, urea type fertilizers for foliage-scattering and seeds for vegetation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for dissolving tamarind seed powder. More specifically, the present invention relates to a method for dissolving tamarind seed powder, which is characterized by stirring in the presence of urea and/or thiourea (hereinafter referred to as ureas).

Tamarind seed powder is a legume plant called Tamarind cicada.
iaa L - Obtained by removing the outer skin from the seeds in the fruit and powdering. The pulp of the tamarind fruit is mainly used as a food ingredient for curries, sauces, etc., and tamarind seeds are obtained as a by-product.
It can be obtained at a low price.

Tamarind seed powder has a crude protein of 16.95 to 20.
12% (weight%, same below), crude fat 6.06-7.3
9%, carbohydrates (polysaccharides) 65.14-72.17%1
Crude fiber 0.76-4.62%, ash 2.45-6.28
%, it is a gray-white to cream-colored powder that is dispersed in water at room temperature, but its viscosity is low. However, when the aqueous dispersion is heated, its viscosity increases significantly and gelatinizes. Such gelatinized products have been used as sizing agents in India and Pakistan since ancient times, and recently they have been used as raw materials for dispersion stabilizers, thickening water retention agents, adhesives, binders, etc. in various industrial fields. It is planned.

However, as mentioned above, tamarind seed powder is dispersed in water at room temperature, but does not dissolve and gelatinize, and it takes 80% to gelatinize.
It is necessary to heat to 0-950C. Such heating for gelatinization is industrially disadvantageous, and in order to produce tamarind seed powder that can be dissolved in water and gelatinized even at room temperature, chemical processes such as esterification and etherification of tamarind seed powder are required for industrialization. Derivatives are obtained through chemical treatment, and polysaccharides are extracted and purified from tamarind seeds.

However, regardless of whether the polysaccharide is converted into a derivative through chemical treatment or the polysaccharide is separated and extracted, an increase in processing cost is inevitable.

The present inventors have conducted intensive research to develop a method for dissolving tamarind seed powder that can be dissolved and gelatinized in water even at room temperature without subjecting the tamarind seed powder itself to water solubilization treatment. The present invention was completed based on the discovery that tamarind seed powder dissolves in water and gelatinizes even at room temperature when stirred in water in the presence of ureas.

In the present invention, ureas may be added to an aqueous dispersion of tamarind seed powder, dissolved in pre-warming water, or mixed with tamarind seed powder in advance.

The amount of urea is preferably 6 parts or more, particularly 10 parts or more, based on 100 parts (by weight, the same applies hereinafter) of water.

Tamarind seed powder is obtained by removing the outer skin from tamarind seeds and pulverizing them, but defatted tamarind seeds can also be used. There are no particular restrictions on the blend of tamarind seed powder, and it is appropriately selected depending on the viscosity of the intended paste and the intended use.

The excellent effect of the present invention is that tamarind seed powder can be sufficiently dissolved and gelatinized at room temperature simply by stirring the tamarind seed powder in water in the presence of urea, but if desired, it can be dissolved and gelatinized by heating or heating. may be promoted.

The time required for stirring varies depending on the amount of tamarind seed powder, processing temperature, stirring conditions, etc., but is usually 60 minutes to 1 hour at room temperature.

For example, a sizing solution containing 5% tamarind seed powder obtained by the method of the present invention is light brown, opaque, and extremely fluid, and is superior to a sizing solution obtained by heating and dissolving tamarind seed powder in water. It exhibits comparable water retention and viscosity, and can be used as a thickening water-retaining agent such as printing dyes and cyjinda liquid, as a binder for granular fertilizers, as a binder for urea-based foliar sprays, as a binder for seeds for vegetation, etc. It is extremely useful as an adhesive.

Note that the paste obtained by the method of the present invention does not precipitate tamarind seed powder even if it is diluted with water and the concentration of ureas is lowered.

The thickening liquid obtained by the method of the present invention contains starch, (1
Part M (! SHP; C!, MO, sodium alginate, guar gum, locust bean gum, gum arabic, etc., has good compatibility with other glues, and may be used in combination with other glues if necessary.Others When used together with glue,
It may be mixed with the tamarind seed paste liquid, or other paste materials may be present when the tamarind seed powder is dissolved. In either case, as long as urea is present, the presence of other thickeners does not impede the dissolution of the seed powder.

When using the method of the present invention, tamarind seed powder can be dissolved and gelatinized at room temperature by simply dispersing tamarind seed powder in water in the presence of inexpensive and easily available ureas, and industrial tamarind seed powder can be It can dramatically increase the value.

Next, the method of the present invention will be explained based on examples, but the present invention is not limited only to these examples.

Example 1 Indian tamarind seed powder (200 mesh baths 9
20° containing 5 parts (5% or more), 6.0 parts, 6.0 parts, 9.0 parts, 12.0 parts, 15.0 parts of urea and 1aJO parts
A dispersion of tamarind seed powder was prepared in addition to 95 parts of cJ's urea aqueous solution.

This dispersion was stirred for 1 hour using a propeller stirrer (rotation speed: 1500 rpm) to obtain a tamarind seed paste. The viscosity (BH type viscometer, 20 rpm N or less) was investigated at each of these urea concentrations. The results are shown in Figure 1.

The obtained tamarind seed paste liquid was pale brown, opaque, and viscous when the amount of urea was low, but it became translucent as the amount of urea increased.

Example 2 A tamarind seed paste solution was obtained in the same manner as in Example 1 except that the stirring time was changed to 24 hours. Their viscosities are shown in FIG.

Example 6 A tamarind seed paste solution was obtained in the same manner as in Example 1, except that thiourea was added in place of urea at concentrations of 6.0% and 6.0%. Their viscosities are shown in FIG.

Example 4 A tamarind seed paste solution was obtained in the same manner as in Example 6 except that the stirring time was changed to 6 hours. Their viscosities are shown in FIG.

Comparative Examples 1-2 Comparative tamarind seed paste liquids were obtained by stirring for 1 hour (Comparative Example 1) and stirring for 24 hours (Comparative Example 2) in the same manner as in Example 1, except that urea was not added.

When the viscosity was measured in the same manner as in Example 1, Comparative Example 1
The viscosity of the size liquid of Comparative Example 2 was 67QP, and 65 cp of the size liquid of Comparative Example 2, which was extremely low.

Example 5 The tamarind seed dispersions containing urea at various concentrations prepared in Example 1 were maintained at 85° C. for 60 minutes with slow stirring to obtain tamarind seed paste solutions. Their viscosities are shown in FIG.

As is clear from FIG. 1, as the amount of urea added increases, more tamarind seed powder is dissolved and gelatinized. In particular, when the concentration of urea and thiourea is 6% or more, the viscosity is comparable to that obtained by dissolving and gelatinizing with 2oOc and that obtained by heating.

Comparative Example 6 The same tamarind seed powder used in Example 1 was mixed with 20% of the tamarind seed powder at concentrations of 2%, 6%, 8% and 10%.
The mixture was dispersed in water at 0°C and stirred for 60 minutes using a propeller stirrer (rotation speed: 11,000 rpm). The viscosity of the comparative tamarind seed paste obtained is shown in FIG.

Comparative Example 4 The dispersion of tamarind seed powder prepared in Comparative Example 2 was
A comparative tamarind seed paste solution was obtained by keeping at °C for 2 hours. Their viscosities are shown in FIG.

As is clear from FIG. 2, dissolution of the tamarind seed powder does not proceed in 2000 ml of water, and dissolution and gelatinization occur only upon heating.

Example 6 A mixture of the same tamarind seed powder and urea as used in Example 1 in a weight ratio of 1:1 was mixed with a urea concentration of 2%, 4%, 6%, 8%, 5%, and 5%. 2 with a weight of 9%
A dispersion of five types of tamarind seed powder was prepared by dispersing it in water at 0°0. Each dispersion was mixed with a propeller stirrer for 60 minutes.
Stir for 1 minute (rotation speed: 11,000 rpm) to obtain a tamarind seed paste solution.

Their viscosities are shown in Table 1.

Example 7 Each dispersion of the five types of tamarind seed powder prepared in Example 6 was maintained at 80oO for 1 hour to obtain a tamarind seed paste solution. Their viscosities are shown in Table 1.

Table 1 As shown in Table 1, when urea is present at 8% or more,
It can be seen that the viscosities of those dissolved in water at 20°C and those dissolved by heating are about the same.

Example 8 Indian tamarind seed powder (200 methus pass 95
% or more) and 100 parts of urea in 800 parts of water at 20°C.
Stir for 60 minutes with a propeller stirrer until viscous &
A tamarind seed paste solution of 150,000 cP was obtained.

For comparison, 100 parts of tamarind seed powder was dispersed in 900 parts of 200 (!) water and stirred for 60 minutes in the same manner as above. The viscosity of the comparative tamarind seed paste liquid obtained was as low as Lloocp. .

When this paste solution was left at room temperature for a day and night, the viscosity only increased to 1+250 cP.

Printing was carried out using the tamarind seed sap containing urea by the method shown below.

(Printing of polyester fabric with dispersible dye) Kayalon Polyester Blue TS <Dispersible dye from Nippon Kajimi Department]
A dye solution was prepared by dissolving 2 parts of citric acid, 0.2 parts of citric acid, and 0.1 part of a reduction inhibitor (sodium metanitrobenzene sulfonate) in 67.7 parts of water. This dye liquid and 60 parts of the tamarind seed paste liquid were uniformly mixed to form a colored paste.

Using the obtained color paste, screen printing was performed on Gilliester satin fabric, and after drying, steaming treatment (13000, 60
minutes) and then washed with water in a conventional manner.

For comparison, polyester satin fabric was printed in the same manner as described above using a color paste prepared using a 12% paste of Maypro Gum NP (a guar gum processed product manufactured by Mayhall Co., Ltd.) as a paste.

The color pariny of each of the obtained prints using the tamarind seed paste liquid was higher than that using the guar gum processed product, and the texture was also better.

(White discharge printing of ground-dyed polyester fabric using stannous chloride)
A dispersion paste was prepared by uniformly mixing 50 parts of the tamarind seed paste solution with 20 parts of stannous chloride (Sn0% 2H20) and 1 part of dicyandiamide dispersed in 29 parts of water.

For comparison, a discharge printing paste for comparison was prepared in the same manner as described above, except that a 12% $211 solution of Hasbindi TG-10 (hydroxypropyl etherified cold water soluble tamarind seed powder manufactured by Shikishima Boseki) was used. Prepared.

Using each of the selected discharge printing pastes, printing was carried out on a polyester plain weave fabric that had been ground-dyed with a 5% dye solution of Miketon Polyester Discharge Plue R. After drying, it was steam-treated at 170°C for 8 minutes in a continuous high-temperature steamer. Afterwards, when washed with water and dried in a conventional manner, the whiteness of the discharge-printed area using tamarind seed paste liquid was extremely satisfactory, and the texture was also good. On the other hand, in the case of the comparative discharge printing paste using processed tamarind seeds, the discharged areas were slightly yellowish brown.

(Alkali discharge printing) 6 parts of potassium carbonate, 6 parts of sodium carbonate, 8 parts of polyethylene glycol, and 8 parts of glycerin were mixed with 50 parts of the tamarind seed paste solution, and water was further added to prepare 100 parts of an alkaline discharge paste. The compatibility was good, no separation or gelation of the paste solution was observed, and the discharge printing paste was highly fluid.

Using this alkaline discharge dyeing paste, 5% Diax Red A2B-FS paste (manufactured by Mitsubishi Chemical Industries, Ltd.) and 0.
Padded with a dye solution containing 2% Keltex P (sodium alginate manufactured by Kelco), printed on 1 m of dried polyester jikozetsu, heat treated in a continuous high temperature steamer for 6 minutes at 180°O in a drying building, It was washed with water using a conventional method. The whiteness of the discharge printed area and the sharpness of the pattern were good.

Example 9 870 parts of 80 parts of Indian defatted tamarind seed powder (200 mesh pass 95% or more) and 50 parts of thiourea
Disperse in 0°C water and stir for 60 minutes with a propeller stirrer.
A tamarind seed paste solution of 120*000cP was obtained. The viscosity of an 8% dispersion of defatted tamarind seed powder containing no thiourea was 450 cP.

Polyacrylic fabric was printed using the defatted tamarind seed paste containing thiourea ◇Kachishin Orange R
Knead 5 parts of H (trade name, cationic dye manufactured by Hodogaya Chemical Industry Co., Ltd.) with 2 parts of thiodiethylene glycol and 10 parts of water to form a paste, and then add 1 part of malic acid and a reduction inhibitor (metanitrobenzenesulfonic acid). 0.1 part of sodium) was added and water was further added to prepare a total of 40 parts of a dye solution. This dye solution and a defatted tamarind seed paste solution containing 60 parts of thiourea were uniformly mixed to obtain a colored paste. The viscosity of this colored paste was 9,800 cP.

This colored paste was printed and dried on an acrylic muslin fabric, and then steamed at 100°O for 60 minutes.

Thereafter, it was finished by washing with water using a conventional method. The texture of the fabric was good, and the level dyeing property was also good.

Example 10 10 parts of the same tamarind seed powder used in Example 8 was dispersed in 80 parts of water at room temperature, and 6 parts of urea and 4 parts of thiourea were added and stirred for 60 minutes. The tamarind seed powder swelled and dissolved to form a paste.

The viscosity of this glue was 160*000 aP.

This paste was used to print a four-dimensional knitted fabric.

That is, 2 parts of Suminol Fast Orange po (trade name, acid dye manufactured by Sumitomo Chemical Co., Ltd.), 1 part of thiodiethylene glycol, and 5 parts of hot water were added to dissolve the dye powder well, and then 0.5 part of citric acid was added. , more water was added to make 40 parts of the dye solution. This was mixed with 40 parts of the above size liquid and 20 parts of 12% size liquid of Sorbitose O-S (trade name, manufactured by Abebe, Netherlands) to form a colored paste. No separation or separation occurred.

When screen printing was performed on a jersey fabric using this color paste, the permeability and permeability through the screen were good. After drying, it was steamed at 100°O and washed with water. Fabric texture, color value, level dyeing,
Everything was good including permeability.

[Brief explanation of the drawing]

Figure 1 is a graph showing the relationship between the viscosity and urea concentration of tamarind seed paste liquids obtained in Examples 1 to 6 and Comparative Example 1γ2, and Figure 2 is a graph showing the relationship between tamarind seeds obtained in Comparative Examples 3 to 4, respectively. It is a graph showing the relationship between the viscosity of paste liquid and the concentration of tamarind seed powder.

Claims (1)

[Claims] 1. A method for dissolving tamarind seed powder, which comprises stirring tamarind seed powder in water in the presence of urea and/or thiourea. 2. The method according to claim 1, which is carried out at room temperature.