JP5277162B2 - Plant bleaching agent and plant bleaching method - Google Patents

Description

  The present invention relates to a treatment agent and a treatment method for completely bleaching a natural plant.

Artificial flowers using natural plants have become popular as preserved flowers in recent years, but plants have unique pigments, and there is no established method for making artificial flowers without changing their color. In order to create an artificial flower-like appreciation that is lively and vibrant, it is necessary to remove the pigments unique to plants and to artificially color them. However, the conventional pigment extraction method and the method using a hydrogen peroxide bleaching method take time to decolor flowers, stems and leaves, which are particularly rich in lignin, and how to use them depending on the plant or plant part. In some cases, it was impossible to remove the color, and reliable and complete decolorization and bleaching were very difficult.
JP-A-5-308924

There exists patent document 1 as a thing regarding the method of bleaching a plant. The invention described in Patent Document 1 utilizes the strong bleaching effect of hydrogen peroxide, but hydrogen peroxide is allowed to act under alkaline conditions in order to ensure the stability of hydrogen peroxide. However, the treatment under alkaline conditions causes great damage to the plant tissue and the tissue becomes melted, and is not suitable for the plant bleaching treatment for producing ornamental objects such as preserved flowers.
In addition, as a conventional technique, there is a method of extracting a plant pigment under heating in water, but this also damages the plant tissue and is not suitable for an ornamental plant.

  An object of the present invention is to provide a treatment agent and a treatment method capable of decolorizing and bleaching almost completely without leaving plants such as fresh flowers.

The treatment agent for plant bleaching of the present invention is
(I) peracetic acid, and / or
(Ii) a) a combination of at least one compound selected from the group consisting of tetraacetylethylenediamine, nonanoyloxybenzenesulfonic acid, decanoyloxybenzoic acid and pentaacetylglucose and b) hydrogen peroxide in a solvent The pH is adjusted to 2 to 4.5, and the water content is 15% by weight or less.

The treatment agent for plant bleaching of the present invention also has
(Iii) a ′) at least one acid selected from the group consisting of lactic acid, succinic acid, formic acid, acetic acid, citric acid, malic acid, tartaric acid, phosphoric acid, hydrochloric acid and sulfuric acid, and b ′) chlorite. A combination of at least one oxidizing agent selected from the group consisting of chlorate, bleaching powder, advanced bleaching powder and chlorinated isocyanuric acid is contained in the solvent, adjusted to pH 2 to 4.5, and moisture content Is 15% by weight or less.

  Surprisingly, the treatment agent of the present invention contains a combination of the peracetic acid of (i) and / or the compound of (ii) in a solvent under non-alkali and low water content conditions. In addition, by including a combination of the compounds of (iii) in a solvent, an extremely strong plant decoloring effect is obtained, and any plant can be completely bleached without damaging the plant tissue. It is an excellent treatment agent for plant bleaching.

  The peracetic acid of (i) alone has a very strong plant bleaching effect under acidic and low water content conditions, alone in a solvent, and is contained in the treatment agent of the present invention at, for example, 0.5 to 15% by weight. Used, preferably 0.5 to 10% by weight, more preferably 0.5 to 7% by weight.

  The combination of component a) and component b) in (ii) is presumably the action of hydrogen peroxide on each of tetraacetylethylenediamine, nonanoyloxybenzenesulfonic acid, decanoyloxybenzoic acid and pentaacetylglucose. This produces peracetic acid and produces a strong plant decolorization effect under acidic and low water content conditions. In such a combination, the component a) is used in the treatment agent of the present invention at, for example, 0.2 to 6% by weight, and particularly preferably 0.5 to 4.5% by weight. ) Component is used in the treating agent of the present invention at, for example, 0.35 to 7% by weight, particularly 1.4 to 4% by weight. In such a combination, the weight ratio of the component a) to the hydrogen peroxide is preferably 1: 0.5 to 7, more preferably 1: 0.5 to 4, and 1: 0. More preferably, it is 5-3. Among the components a), tetraacetylethylenediamine or pentaacetylglucose can be particularly preferably used.

  The combination of the component a ′) and the component b ′) of (iii) is strong under acidic and low water content conditions by the action of the oxidizing agent of the component b ′) on the acid of the component a ′). A plant decolorization effect. In such a combination, the component a ′) is used in the treatment agent of the present invention at, for example, 0.2 to 10% by weight, particularly preferably 1 to 5% by weight, and the component b ′). Is used in the treating agent of the present invention at, for example, 0.01 to 10% by weight, particularly preferably 0.05 to 5% by weight. In such a combination, the weight ratio of the a ′) component to the b ′) component is preferably 2 to 200: 1, more preferably 4 to 50: 1, and more preferably 8 to 35: 1. Is more preferable. As the chlorite of the component b ′), for example, sodium chlorite can be used, and as the chlorate, for example, sodium chlorate, potassium chlorate, and calcium chlorate can be used.

As the solvent constituting the treatment agent of the present invention, various solvents having a high polarity can be used. Preferably, a lower alcohol having 1 to 4 carbon atoms, such as methanol, ethanol, n- or iso-propanol, is used. Methanol or ethanol can be suitably used, and methanol is the most effective.
The treatment agent for plant bleaching according to the present invention is obtained by adding the peracetic acid of (i) and / or the combination of the compound of (ii) into the solvent and mixing them, and also by the method of (iii). It can be easily prepared just by adding and mixing a combination of compounds in the above-mentioned solvent, and in general, it becomes pH 2 to 4.5 without using a pH adjuster, and exhibits an excellent bleaching effect. In this case, it may be adjusted to such an acidic range using a pH adjuster as appropriate.
The moisture content of the plant bleaching treatment agent of the present invention is preferably 10% by weight or less, more preferably 0 to 8% by weight, even more preferably 0 to 4% by weight. Furthermore, in the treatment agent of the present invention, a very high plant bleaching effect is obtained, and the plant damage is small.

The treatment agent of the present invention can be obtained by simply immersing a plant directly in it, and bleaching not only the petals of fresh flowers but also thick parts such as stems and sepals in a short time efficiently and completely without any whitening. can do. Such immersion treatment is preferably performed by adjusting the temperature of the treatment agent to 10 to 50 ° C., and generally, immersion treatment is performed for 30 minutes to 6 days. It is preferable to perform a moisturizing treatment after the immersion treatment, and it is even more preferable to perform the moisturizing treatment after the immersion treatment and before the drying has yet progressed.
In addition, the treatment agent of the present invention includes a further additive such as N-methyl-2-pyrrolidone, ethylene glycol dimethyl ether, benzyl alcohol, or the like, depending on the type and part of the plant to be treated, to enhance the bleaching effect. be able to.

  According to the plant bleaching agent and the bleaching method of the present invention, a plant can be obtained without damaging the petals of fresh flowers, for example, in the case of a thick plant such as a Stefanothis leaf and a pine branch / leaf, and also a stem, a stem, etc. Even in a thick and hard part containing a large amount of lignin, it can be bleached almost completely white in a very fresh state, without loss of shape and efficiently in a short time. Plants bleached in this way can be dyed in various colors using the methods used for the production of ordinary preserved flowers, or can be further enhanced in quality using finishing agents such as humectants. Is possible.

[Example 1-16 and Comparative Example 1-4]
The treatment agents of the present invention of Examples 1 to 16 (each pH 2 to 4.5) and the treatment agents of Comparative Examples 1 to 4 having the compositions shown in Table 1-1 and Table 1-2 were prepared, and these treatment agents ( 30 ° C), each of the fresh flowers of yellow rose (including some stems and leaves under the flowers) is immersed in the time shown in Table 1-1 and Table 1-2 and then pulled up from the treatment solution. The appearance of was evaluated. The results are shown in Table 2. In addition, the moisture content of the process liquid of the Example in Table 1-1 and Table 1-2 is 10 weight% or less, More specifically, it is 0.5 to 8 weight%.
Not only the petals of roses but also the stems and stems that have been difficult to completely bleach in the past are completely bleached in a short time with the treatment agent according to the present invention, or at least various colors are artificially produced. Bleached to an acceptable white for dyeing. Along with the appearance evaluation, the state of the plant after the treatment was also evaluated, but all the fresh flowers treated with the treatment agent according to the present invention were not damaged in shape and structure, and each part maintained the supple state of the fresh flowers.

[Example 17]
In each of 13 treatment agents having the same composition as in Example 1, Example 2, Examples 5-12, and Examples 14-16, Stefanotic leaves and pine leaves were immersed at room temperature, and treated 24 hours later. The plant was pulled up from the agent, and the appearance and state of each plant after treatment were evaluated.
Conventionally, these plants that could not be completely decolored were completely bleached perfectly with the treatment agent according to the present invention, and none of the plants were damaged in shape or structure, and the suppleness immediately after harvesting the plants was improved. Was maintained.

Claims (6)

(I) peracetic acid, and / or
(Ii) a) a combination of at least one compound selected from the group consisting of tetraacetylethylenediamine, nonanoyloxybenzenesulfonic acid, decanoyloxybenzoic acid and pentaacetylglucose and b) hydrogen peroxide in a solvent Characterized in that it is adjusted to a pH of 2 to 4.5, the water content is 15% by weight or less , and the solvent comprises at least one lower alcohol having 1 to 4 carbon atoms. A processing agent for bleaching fresh flowers and / or leaves of trees containing petals, stems, leaves and / or leaves . a ′) at least one acid selected from the group consisting of lactic acid, oxalic acid, formic acid, acetic acid, citric acid, malic acid, tartaric acid, phosphoric acid, hydrochloric acid, and sulfuric acid, and b ′) chlorite, chloric acid A combination of at least one oxidizing agent selected from the group consisting of salt, bleached powder, highly bleached powder and chlorinated isocyanuric acid is contained in the solvent, adjusted to pH 2 to 4.5, and has a water content of 15 A fresh flower comprising petals, stems, leaves, and / or leaves, characterized in that it is not more than% by weight and the solvent comprises at least one lower alcohol having 1 to 4 carbon atoms , and / or Treatment agent for bleaching leaves of trees . Wherein a) the weight ratio of the component b) of the component 1: according to claim 1, characterized in that 0.5 to 7, fresh flowers including petal, stems, calyx, and / or leaves, and / or Treatment agent for bleaching tree leaves . A fresh flower comprising petals, stems, postcards and / or leaves according to claim 2, wherein the weight ratio of the a ') component to the b') component is 2 to 200: 1 , and / or Treatment agent for bleaching tree leaves . To prepare a treatment agent according to any one of claims 1 to 4 just prior to bleaching plants, characterized by immersing the plant directly to the treatment agent, petal, stem, sepal and / or leaves A method for bleaching fresh flowers and / or leaves of trees . The said flower is immersed in the said processing agent of 10 to 50 degreeC for 30 minutes-6 days, The fresh flower and / or tree containing a petal, a stem, a postcard, and / or a leaf of Claim 5 characterized by the above-mentioned. A method for bleaching leaves of trees .