JP4823835B2 - Plant bleaching agent and bleaching method - Google Patents

Description

  The present invention relates to a decolorizing agent for plants, particularly a decolorizing agent suitable for use in the production of artificial flowers using fresh flowers and leaves, and a decoloring method using the same.

Artificial flower production methods using fresh flowers and the like are widely practiced as preserved flowers, and among them, a method of decoloring and dyeing fresh flowers and the like is also known. However, it is said that it is preferable to use a hydrogen peroxide-based bleach for the method of decoloring fresh flowers (Patent Document 1, [0023] Patent Document 2, [0007] Patent Document 3, etc.) However, such conventional decoloring methods have the following problems.
1) There are colors that are not decolored (flower yellow, stem green, etc.).
2) Use of a strong oxidizer may damage the plant itself.
3) Decolorization takes time (often takes 2 days or more).
4) Since the oxidizing agent is water-soluble (water enters the alcohol), the water and alcohol in the plant cannot be replaced successfully.

Separately, Patent Document 4 discloses a method in which a liquid composed of a lower alcohol and an organic acid is used as a decolorizing liquid, and a plant body is immersed in the decolorizing liquid. However, this decolorizing liquid does not brown a fresh flower or the like. Therefore, even if it was immersed for 24 hours, it could not be decolored until the fresh flowers and the like became white.
JP-T-4-505766 JP 2004-99605 A JP 2004-203815 A JP 2006-111598 A

  The present invention provides a decolorizing agent and decolorizing method that can eliminate such drawbacks and efficiently decolorize plants such as fresh flowers in a durable and fresh state without using a powerful drug such as hydrogen peroxide. The issue is to provide.

  The present inventor has found that the above problem can be solved by using a combination of a lower alcohol having 1 to 3 carbon atoms and another organic polar solvent under acidic conditions.

  That is, in the present invention, 0.5 to 10% by weight of an organic acid is added to an organic solvent containing a lower alcohol having 1 to 3 carbon atoms and another organic polar solvent in a weight ratio of 50:50 to 95: 5. What is added and mixed at a ratio is used as a decolorizing agent for plants such as fresh flowers.

  With such a decolorizing agent of the present invention, it is possible to efficiently decolorize fresh flowers and the like in a short time in a short time simply by immersing the fresh flowers and the like therein. A red flower can be completely decolored in 1 to 2 hours, and a yellow flower that has been impossible in the past can be decolored in about 2 to 5 hours.

  As the lower alcohol, methanol, ethanol, n- or iso-propanol can be used, but methanol and ethanol are preferable, and methanol can be used most efficiently.

  Other organic polar solvents used in combination with these lower alcohols may be those that are soluble in lower alcohols and can be used as dye solubilizers, such as N-methyl-2-pyrrolidone, NN-dimethyl. Acetamide, NN-dimethylformamide, dimethylsulfoxide, ethylene glycol dimethyl ether, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, propylene glycol monomethyl ether acetate, ethylene glycol monobutyl ether acetate, benzyl alcohol, acetone, methyl ethyl ketone, epsilon caprolactam, propylene glycol Monomethyl ether, ethylene glycol monoethyl ether, diethylene glycol monoethyl Ether, diethylene glycol monobutyl ether, ethylene glycol monomethyl ether acetate, 3-methoxy-1-butanol, methyl isopropyl ketone, methyl isobutyl carbinol, methyl isobutyl ketone, methyl lactate, ethyl lactate, butyl lactate, diacetone alcohol, thiodiglycol, It is preferable to use one selected from the group consisting of butyl acetate, allyl acetate, isopropyl acetate, amyl acetate, ethyl acetate, 1,3-butanediol and methoxybutanol, and these may be used in combination of two or more. Particularly preferred as other organic polar solvents are N-methyl-2-pyrrolidone, NN-dimethylacetamide, NN-dimethylformamide, dimethylsulfoxide, ethylene glycol dimethyl ether, diethylene glycol monoethyl ether, ε-caprolactam and the like. These may be used alone or in combination, and may contain additives. Moreover, what is generally marketed as a dye dissolving agent can also be used as this solvent. For example, LEVALIN EX-BNS manufactured by LANXESS, Lyocol BC and Lyocol KH manufactured by Clariant Japan, Solver 580 manufactured by Kotani Chemical Co., Ltd., Nichiron Solve N-507 manufactured by Nissei Kasei Co., Ltd., Nissinsol 2G manufactured by Nisshin Chemical Co., Ltd. Nissinsol CF, Morin TDG and Morinsol HIT from Morin Chemical, Glyecin A, Glyecin BC or Sesolvan L from BASF, Glycozol N1 and Glycozol N-150 from Osaka Chemical, Glysol AAC from Shichifuku Chemical Glysolve AOX, Glysolve BE or Glysolve ZO, manufactured by Meisei Chemical Co., Selenazole PDN manufactured by Senka, Dicent DH and Newsolv EG manufactured by Nikka Chemical Co., Ltd., Toho Salt A100 or CP60 manufactured by Toho Chemical Co., Ltd., manufactured by Nikko Giken Hydrozol EG, Hydrozol N or Hydrozol TN, Penezole CPX from Furukawa Chemical Co., Yunicazole D-2, Yunicazole LX-7 or Yunicazole from Yuni Kasei EB etc.

  In addition, the mixing ratio of the lower alcohol and the other organic polar solvent may be 50:50 to 95: 5 by weight ratio, but is preferably about 55:45 to 90:10. If the amount of the other organic polar solvent is too large, it becomes difficult to keep fresh flowers fresh, and the degree of decolorization also deteriorates.

  The organic acid may be added and mixed in order to keep the decoloring agent acidic. Usually, it may be added and mixed with the decoloring agent at a ratio of about 0.5 to 5% by weight, and is about 1 to 3% by weight. Is preferred.

  Examples of organic acids used include formic acid, acetic acid, propionic acid, butyric acid, valeric acid, itaconic acid, octylic acid, cyclohexanecarboxylic acid, tartaric acid, malic acid, sebacic acid, gluconic acid, butanetetracarboxylic acid, lactic acid, Examples include repric acid, oxalic acid, malonic acid, maleic acid, fumaric acid, succinic acid, glutaric acid, adipic acid and citric acid.

  Such a decolorizing agent of the present invention is capable of decoloring fresh flowers and the like by simply immersing plants such as fresh flowers therein, and the immersion treatment can be carried out at room temperature.

  In addition, the fresh flower etc. which were decolored in this way can be dye | stained to various colors by the method of a normal preserved flower after decoloring.

Next, examples of the present invention will be described.
Examples 1-6 and Comparative Example 1
Seven types of decoloring agents having the compositions shown in Table 1 were prepared, and yellow roses were immersed in these decoloring agents at room temperature to test the decolorization state. The results are shown in Table 1.
Conventionally, yellow flowers, which have been considered not to be decolorized, can be decolorized with a decolorizing agent containing a lower alcohol, another organic polar medium and an organic acid according to the present invention. It was possible to decolorize white. In Example 1-3 in which glacial acetic acid was used as the organic acid, a slight acetic acid odor remained in the product, but in Example 4-5 in which itaconic acid was used, an odorless and good quality product could be obtained. did it.

Example 7-10 and Comparative Example 2-4
Seven kinds of decoloring agents having the compositions shown in Table 2 were prepared, and yellow roses were immersed in these decoloring agents at room temperature to test the decolorization state. The results are shown in Table 2.
In Examples 7-10 according to the present invention, efficient decolorization was possible while keeping the flowers fresh, but in Comparative Example 2-4 where the amount of lower alcohol used was small, immersion in a decolorizing agent Thus, the state of the flowers deteriorated. In particular, in Comparative Example 3-4, decolorization also deteriorated.

Examples 11-13
As shown in Table 3, red roses, yellow chrysanthemums and yellow sunflowers were immersed in a decolorizing agent having the same composition as in Example 10, and the state of decolorization was tested. Red roses were completely decolorized in 1 hour, and yellow chrysanthemums were decolorized in about 2 hours, just like yellow roses. Sunflower took a little time because of its low moisture content, but it could be completely decolorized.

Examples 14-18
As shown in Table 4, five kinds of decoloring agents having different compositions were prepared, red roses were immersed, and the state of decolorization was tested. In Examples 17 and 18, the color was completely decolored in 1-2 hours, and decoloration took time in the order of Examples 16, 15, and 14. However, practical decolorization was possible in both cases.
Moreover, as a result of the immersion test on the yellow rose, in Examples 17 and 18, it was possible to completely remove the color in 4-5 hours.

Examples 19-20
By decoloring the ivy leaf and yellow rose with the decoloring agent shown in Table 5, and then immersing in a moisturizing agent containing dye ("Kikka Craft") We were able to obtain a product with a beautiful appearance,
Ivy leaf takes a little more time than flowers to bleach, but after dyeing for 24 hours, it can be dyed to obtain a product that is beautifully dyed in natural colors. It was completely decolorized by time decoloring treatment, and it was possible to transform it into a beautiful pink rose by immersion in a moisturizer containing dye.

  In addition, when the asparapella was treated in the same manner as the ivy leaf, it was possible to obtain a product with a natural appearance while keeping the leaves fresh.

  Thus, any of the fresh flowers and the like decolorized in the examples can be colored to a desired color by applying a finishing agent to which a dye is added by a conventional preserved flower method. It was possible to finish it as if it were a fresh flower.

Claims (5)

C1-C3 lower alcohol, N-methyl-2-pyrrolidone, NN-dimethylacetamide, NN-dimethylformamide, dimethylsulfoxide, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, propylene glycol monomethyl ether acetate, ethylene glycol monobutyl ether acetate, benzyl alcohol, acetone, methyl ethyl ketone, epsilon-caprolactam, ethylene glycol monomethyl ether acetate, methylation isopropyl ketone, methyl isobutyl carbinol, methyl isobutyl ketone, methyl lactate, ethyl lactate, butyl lactate, die A seton alcohol, acetic acid butyl, allyl acetate, isopropyl acetate, Amir, and ethyl acetate Other organic polar solvent selected from Ranaru group, in a weight ratio of 50: 50-95: an organic solvent in a proportion of 5, by comprising adding and mixing an organic acid in a proportion of 0.5 to 10 wt% A plant bleaching agent characterized by. The decoloring agent according to claim 1, wherein the other organic polar solvent is selected from the group consisting of N-methyl-2-pyrrolidone, NN-dimethylacetamide, NN-dimethylformamide, diethylene glycol monobutyl ether acetate, and methyl ethyl ketone. The organic acid is formic acid, acetic acid, propionic acid, butyric acid, valeric acid, itaconic acid, lactic acid, octylic acid, cyclohexanecarboxylic acid, tartaric acid, malic acid, sebacic acid, gluconic acid, butanetetracarboxylic acid, repric acid, oxalic acid 3. A decolorizing agent according to claim 1 or 2, which is selected from the group consisting of malonic acid, maleic acid, fumaric acid, succinic acid, glutaric acid, adipic acid and citric acid. The decoloring agent according to any one of claims 1 to 3, wherein the organic acid is selected from the group consisting of acetic acid, itaconic acid and lactic acid. A plant decolorization method comprising immersing a plant in the decolorizing agent according to claim 1 to decolorize the plant.