JPH0232193A - Gel-like instant cold-storing and freshness-preserving agent - Google Patents

Abstract

PURPOSE:To provide the subject preserving agent exhibiting the lowering of temperature when a composition containing ammonium nitrate, etc., and sodium alginate, etc., is mixed with an aqueous solution containing chlorine dioxide, etc,, to produce a gelled product and having effects on the preservation of the freshness of fish meats, fruits and vegetables and on the deodorization of refrigerators. CONSTITUTION:The subject preserving agent exhibits the lowering of temperature when components (A) and (B) are mixed in an A/B ratio of 20-80%/100% wherein the component A is a composition comprising (i) 50-99.9% of one or more of ammonium nitrate, ammonium chloride, sodium nitrate, potassium nitrate, potassium permanganate, urea, sodium carbonate (10 hydrate), sodium sulfate (10 hydrate), disodium phosphate (12 hydrate), ammonium phosphate (3 hydrate), tetrasodium borate, etc., and (ii) 0.1-50% of one or more of alginate salts and esters, carrageenan, water-absorbing resins, hydrophilic carboxyvinyl polymers and PVA and the component B is chlorine dioxide and/or a hypochlorous acid salt.

Description

Detailed Description of the Invention [Object of the Invention] (A) Industrial Field of Application The present invention utilizes the refrigeration effect associated with instantaneous cooling and the oxidizing, sterilizing, and anti-mildew effects of chlorine dioxide gas gradually released. The present invention relates to a gel-like instant cooling freshness-preserving agent that is effective in preserving the freshness of fruits and vegetables and deodorizing refrigerators, etc.

(B) Prior art and problems Regarding portable coolants, as is known from Japanese Patent Publication No. 58-187482, negative latent heat is utilized when ammonium chloride, ammonium sulfate, sodium sulfate, sodium sulfite, etc. are dissolved in water. It is used for leisure activities such as fishing, swimming at the beach, sports, and as a cold drink for bruises, headaches, and toothaches.

However, as mentioned above, this application is limited to fields that utilize the short-term cold retention effect.

Furthermore, if the covering bag or container is damaged during use, the contents may flow out and wet or stain the object to be cooled.

Regarding gel-like cold storage agents that have been conventionally frozen in refrigerators, G4
Totoku galac 1-mannan, starch, known as 279
A gel-like material obtained by mixing propylene glycol, poval, etc. with water and sealed in a film of polyethylene or the like is used.

The use of this gel-like coolant is almost the same as that of the portable coolant described above.

Further, as for gel compositions containing chlorine dioxide, there are those comprising a water-absorbing polymer compound and a stabilized aqueous solution of chlorine dioxide, as disclosed in Japanese Patent Publication No. 61-40803.61-181532.

It is used as a deodorizer, sterilizer, etc. based on the strong oxidizing effect of the gradually generated chlorine dioxide gas, but it is not used as a freshness-preserving agent.

(C) Problems to be Solved by the Invention The present invention enables gel-like cold storage agents that are conventionally used to be frozen in refrigerators to be used without pre-cooling.

That is, when the container of a liquid portable cool storage agent is damaged, the drawback that the contents wet or stain the object to be cooled is improved.

In addition, commonly used cold storage agents have a freshness-preserving effect only for a short period of time when they exhibit their cooling effect, but the present invention can maintain freshness for a long time even at room temperature.

Furthermore, the present invention is unique in that it not only functions as a gel-like instant cool storage freshness preserving agent, but also has sterilization, anti-mold, and deodorizing effects for refrigerators, etc., which is not found in other products.

[Configuration of the Invention (A) Means for Solving the Problems The present invention uses ammonium nitrate, a coolant that has negative latent heat when dissolved in water,
Ammonium chloride, sodium nitrate, potassium nitrate, potassium permanganate, urea, sodium carbonate (decahydrate), sodium sulfate (decahydrate), disodium phosphate (decahydrate), trisodium phosphate (decahydrate) ) Sodium pyrophosphate (decahydrate), ammonium phosphate (
trihydrate), sodium tetraborate (decahydrate), monohelium metaborate (tetrahydrate), and one or more types of boric acid in 50 to 99.9% sodium alginate, potassium alginate, alginic acid. Ammonium, alginate propylene glycol ester, carrageenan, high molecular compound water absorbing resin, hydrophilic carboxyvinyl polymer.

Add 0.1 to 50% of a gelling agent consisting of one or more types of polyvinyl alcohol and mix until the whole is homogeneous, and add one or two types of chlorine dioxide or chlorites before use. The first feature is to obtain a cooled gel-like composition by mixing an aqueous solution containing 0.01 to 50% to a ratio of 20 to 80%.

The second feature of the present invention is that when the gel composition is sealed with a shielding material such as resin laminated paper or semipermeable nonwoven fabric that allows chlorine dioxide gas to pass through but not an aqueous solution, the The chlorine dioxide gradually passes through the shield to maintain freshness and sterilize and prevent mold.

It has a deodorizing effect.

Traditionally, there have been gel-like cold storage agents that are frozen in advance in a refrigerator and portable coolants that are made by adding water to a cooling composition with a negative latent heat of solution just before use. No gel-like cold storage agent that exhibits a cooling effect has been found.

Liquid or sol type cold storage agents have the disadvantage that if the bag or container is damaged during use, the contents may flow out and wet or stain the object to be cooled. It is excellent in terms of safety.

A coagulated composition containing chlorine dioxide or chlorites is used as a deodorizing agent for automobiles, refrigerators, cupboards, indoor spaces, toilets, shoe cabinets, etc., as known in Japanese Patent Publication No. 6]-40803. The present invention is characterized in that, in order to maintain the freshness of the gel-like instant cold storage agent by the refrigeration effect even at room temperature, a freshness-preserving effect is added due to the oxidizing action of chlorine dioxide gradually generated from the gel-like composition. shall be.

In addition to its freshness-preserving effect, chlorine dioxide also sterilizes.

It also has anti-mold and deodorizing properties, so it can be used to deodorize and sterilize refrigerators, and as an anti-mold agent.

In addition to being used as a cold storage agent that is frozen in a conventional refrigerator and used as an instant cold storage agent that melts immediately before use and utilizes negative latent heat, the present invention can also be used as a freshness-preserving agent for fish meat and fruits and vegetables.
Refrigerator, car 2 cupboards.

A feature not found in conventional products is that it also has uses unique to chlorine dioxide, such as deodorizing, sterilizing, and mold-proofing for rooms, toilets, shoe cabinets, etc.

The gel-like instant cold storage freshness-preserving agent obtained in the present invention may contain various other components such as colorants, fragrances, freezing point depressants, etc., if necessary.

(I3) Effects and Examples Hereinafter, the present invention will be explained in more detail with reference to Examples.

After adding 5.5 parts by weight of propylene glycol alginate to 40 parts by weight of ammonium nitrate and mixing uniformly,
Add 45 parts by weight of chlorine dioxide to 0.55 parts by weight and 99.9 parts of water.
A gel composition is obtained by dissolving and dispersing it in an aqueous solution containing 45 parts by weight.

Further, the cold storage effect of 11 og of the gel composition thus obtained at room temperature (22°C) is shown in Table 1.

For comparison, the cold storage effect of commercially available instant coolant (liquid) is also shown.

From Table 2 - Table 9, the gel-like instant cool storage agent of this example shows almost the same cold storage effect as the commercially available instant coolant (liquid), and is safer because it is gel-like. It can be said that it is superior to commercially available products in terms of performance.

Next, the gel compositions obtained in the two examples were placed in polyethylene laminated Japanese paper and heat-sealed, and a freshness retention test 1- was conducted on strawberries immediately after harvesting. The results are shown in Table 2. For comparison, a product without a freshness preserving agent is also listed as Control 1-Role.

X O: Little discoloration Δ: I! No color change occurs, but there is discoloration and swelling.
: It is clear from Table 2 that more than half of the strawberries have mold that mold is effective in maintaining the freshness of the strawberries.

[Effects of the Invention] (1) The first effect of the present invention is that, as shown in Table 1 of Examples, although it is in the form of a gel, it is almost the same as a commercially available liquid instant refrigerant. This point shows the cold storage effect.

(2) The second effect of the present invention is that, as shown in Table 2 of Examples, it exhibits an effective freshness-preserving effect on strawberries at room temperature.

Claims (2)

[Claims] (1) Ammonium nitrate, ammonium chloride, sodium nitrate, potassium nitrate, potassium permanganate, urea,
Sodium carbonate (decahydrate), sodium sulfate (decahydrate), disodium phosphate (decahydrate), trisodium phosphate (decahydrate), sodium pyrophosphate (decahydrate), ammonium phosphate (decahydrate), sodium alginate, potassium alginate, ammonium alginate, propylene alginate with 50 to 99.9% of one or more of sodium tetraborate (decahydrate), sodium metaborate (tetrahydrate), and boric acid. [A
]. Next, an aqueous solution containing 0.01 to 50% of one or two of chlorine dioxide or chlorites is designated as [B]. A gel-like instant cool storage agent composition that exhibits a temperature drop when the two are mixed and gelled so that the ratio of [A] to [B] is 20 to 80%. (2) A freshness-preserving agent composition characterized in that the gel-like instant cool storage agent composition is sealed with resin laminated paper or semi-permeable membrane-like nonwoven fabric to gradually generate chlorine dioxide gas from the gel-like composition.