JP2000119633A - Gel composition containing methoxymethylated polyamide and 2-hydroxyethyl methacrylate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a gel composition which is not dissolved and does not lose its shape in a short time even in water, especially even in running water, by incorporating a methoxymethylated polyamide and 2-hydroxyethyl methacrylate, as gelling agents, into the same. SOLUTION: If necessary, a functional substance, preferably supported by fine porous particules, is also incorporated. Since the composition, which contains a methoxymethylated polyamide and 2-hydroxyethyl methacrylate, is hardly soluble in water, the composition also containing a functional substance does not lose its shape even when immersed in water, warm water, or running water and slowly releases the effective component of the functional substance, thus exhibiting the effects of the substance for a long term. The composition can be prepared by adding a required functional substance to a mixed solution of a methoxymethylated polyamide and 2-hydroxyethyl methacrylate and then adding a lower alcohol.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a gel composition comprising a methoxymethylated polyamide and 2-hydroxyethyl methacrylate as a gelling agent.

[0002]

BACKGROUND OF THE INVENTION Conventional gel compositions and processes for their preparation comprise one or more solid inorganic carrier materials selected from the group consisting of magnesium powder, activated carbon, zeolites and silica-based absorbents. A method for producing a perfume-containing aqueous air-refreshing gel, characterized in that the perfume is homogeneously mixed, and then the homogenous mixture thus obtained is combined with an aqueous gel, each gel-forming component. No. 59-55255), dipropylene glycol alkyl ether and / or propylene glycol alkyl ether 0.1 to 40% by weight, gelling agent 0.1 to 15% by weight, fragrance 0.1 to 30% by weight, and water 5
0 to 90% by weight of a water gel fragrance composition (JP-A-63
-43666), a gel-type fragrance composition (Japanese Patent Laid-Open No. 6-37086), wherein a polymer particle impregnated with a fragrance is mixed into a gelling agent, and a gel-like part containing a volatile active ingredient. In addition, the gel region having a different content of the volatile active ingredient coexists, and the gel region having the higher content of the volatile active ingredient is formed into a gel by solubilizing the volatile active ingredient by the surfactant, and the gel is formed. When the part has been volatilized and the weight has decreased, the concentration gradient due to the difference in the volatile active ingredient content between the gel-like areas causes the gel-like area with the higher volatile active ingredient content to come into contact with the lower one. The volatile active ingredient is supplied to the gel-like area, and the supplied volatile active ingredient is also volatilized from the lower gel-like area having a lower content of the volatile active ingredient. Composition (Japanese Unexamined Patent Publication No. 27743 No.), and the like.

[0003]

As described above, the purpose of the conventional gel composition is to contain a fragrance and the like and sublimate them in the air. It dissolves in a short time, and the shape usually collapses. That is, use in hot or cold water or running water was not considered. Therefore, development of a gel composition that can be gradually dissolved for a long time even in hot or cold water or running water has been a problem.

[0004]

Means for Solving the Problems The present inventors have conducted intensive studies in order to solve the above-mentioned problems, and as a result, have come to provide a gel composition which is gradually dissolved over a long period of time. That is, a gel composition comprising a methoxymethylated polyamide and 2-hydroxyethyl methacrylate as a gelling agent, and a methoxymethylated polyamide, 2-hydroxyethyl methacrylate and a functional substance as a gelling agent Which is a gel-like composition characterized in that a functional substance can be supported on porous fine particles.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The methoxymethylated polyamide referred to in the present invention is also called type 8-nylon, and hydrogen of an amide bond (—NH—CO—) of polyamide (nylon) is converted to a methoxymethyl group (—CH ₂ —). O—CH ₃ —)
The compound substituted by 8 to 33 mol /% is a compound represented by the chemical formula of the formula (1). Insoluble in water, but soluble in lower alcohols such as methyl alcohol and ethyl alcohol.

[0006]

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[0007] The 2-hydroxyethyl methacrylate referred to in the present invention is also called 2-hydroxyethyl methacrylate, is a colorless and transparent liquid, and is soluble in water. Its chemical formula is a compound represented by the formula (2).

[0008]

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The functional substance referred to in the present invention is a substance having a function represented by a fragrance, a deodorant, a repellent, an attractant, an antibacterial agent, a bactericide, a freshness preserving agent, a photocatalyst and the like. ,
The solubility in water does not matter whether it is soluble or hardly soluble.

The porous fine particles referred to in the present invention include cyclodextrin as the organic porous fine particles. Further, as the inorganic compound used for the inorganic porous fine particles, alkaline earth metal carbonate,
Silicates, phosphates, sulfates, metal oxides, metal hydroxides,
Other metal silicates or other metal carbonates can be used. Further, the shape of the inorganic porous fine particles used in the present invention can be any shape,
For example, those having a substantially spherical shape, a substantially elliptical shape, a substantially polygonal shape, an irregular shape, or the like can be used. Especially
Inorganic porous fine particles described in JP-A-55454 can be suitably used.

Specifically, calcium carbonate, barium carbonate, magnesium carbonate and the like as alkaline earth metal carbonates, calcium silicate, barium silicate, magnesium silicate and the like as alkaline earth metal silicates, and alkaline earth metal silicates Metal phosphates such as calcium phosphate, barium phosphate, magnesium phosphate, and the like, and alkaline earth metal sulfates such as calcium sulfate, barium sulfate,
Examples thereof include magnesium sulfate.

Further, silica, titanium oxide, iron oxide, cobalt oxide, zinc oxide, nickel oxide, manganese oxide, aluminum oxide and the like are used as metal oxides, and iron hydroxide, nickel hydroxide and hydroxide are used as metal hydroxides. Aluminum, calcium hydroxide, chromium hydroxide and the like can be exemplified. Examples of other metal silicates include zinc silicate, aluminum silicate, and magnesium silicate, and examples of other metal carbonates include zinc carbonate, aluminum carbonate, copper carbonate, and magnesium carbonate.

[0013] Such inorganic porous fine particles can be produced, for example, by a known interface reaction method. In this interfacial reaction method, a water-in-oil type emulsion (emulsion) is formed from an inorganic compound aqueous solution using an organic solvent and a surfactant, and this is mixed with another aqueous solution to cause a precipitation reaction at a water droplet interface. After the inorganic shell is formed, by-products and surfactants are removed to obtain inorganic porous fine particles having no hollow or hollow portion, that is, non-hollow. Specifically, inorganic porous fine particles (trade name: Godball) manufactured by Suzuki Yushi Kogyo Co., Ltd., which has been commercialized, can be used.

The inorganic porous fine particles have the following characteristics, including hollow and solid. That is, the particle diameter is 0.5 to 25 μm, and the surface pore diameter is 20 to 150.
Å, the specific surface area is 300 to 700 m ² / g, and the bulk density is 0.
18 to 0.40 g / cm ³ . In the hollow inorganic porous fine particles, a functional substance dissolved or dispersed in a solvent can be included in an amount of 160 to 180 ml / 100 g,
The non-hollow inorganic porous fine particles can be impregnated with a functional substance dissolved or dispersed in a solvent at 80 to 175 ml / 100 g. FIG. 1 shows a schematic cross-sectional structure of the inorganic porous fine particles carrying the functional substance. In the figure, the functional substance 2 is encapsulated in a hollow inorganic porous fine particle 1 whose wall substance is made of silicic anhydride, that is, encapsulated. 2 gradually seeps out and the effect of the functional substance
It can last for a long time. Note that FIG.
The functional material 2 can be impregnated in the voids 5 of non-hollow inorganic porous fine particles as shown in FIG.

The lower alcohol referred to in the present invention means a monovalent saturated alcohol having 1 to 8 carbon atoms, and specifically, methyl alcohol, ethyl alcohol, propyl alcohol, isopropyl alcohol, butyl alcohol, isobutyl alcohol, n -Amyl alcohol, isoamyl alcohol, hexyl alcohol, heptyl alcohol, octyl alcohol and the like.

The gel composition referred to in the present invention is a mixture of a methoxymethylated polyamide and a compound having an acryloyl group, for example, 2-hydroxyethyl methacrylate, to which a required functional substance is added, and then a lower alcohol is added. And gelled. The ratio of methoxymethylated polyamide to the whole gel was 10
-30% by weight, especially 15-25% by weight, and the amount of 2-hydroxyethyl methacrylate to be mixed is 10%.
-50% by weight, especially 30-40% by weight is desirable. Further, the lower alcohol as a volatile component is desirably 30 to 90% by weight, particularly preferably 40 to 70% by weight.

The gel composition of the present invention also breaks down in water or running water when the ratio of the lower alcohol as a volatile component is high, and flows out. However, by changing the ratio of the lower alcohol to 2-hydroxyethyl methacrylate, A gel that is hardly soluble in water can be formed. For the whole gel,
The mixing ratio of 2-hydroxyethyl methacrylate is 20
% By weight or more is necessary, and the higher the ratio, the higher the sparing solubility in water. The lower alcohol used in the present invention does not necessarily need to be a single compound, and may be a mixture of lower alcohols.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The outline of the present invention will be described. As a gelling agent, a gel composition is prepared from a mixed solution of methoxymethylated polyamide and 2-hydroxyethyl methacrylate, or the functional substance is added to a mixed solution of methoxymethylated polyamide and 2-hydroxyethyl methacrylate. And a lower alcohol is added to prepare a gel composition.

The details of the present invention will be described based on examples, but the gist of the present invention is not limited thereto. (Example 1) 20 g of methoxymethylated polyamide (fine resin FR, manufactured by Lead City Co., Ltd.) as a gelling agent and 2
-Hydroxyethyl methacrylate (Kyoeisha Co., Ltd., Light Ester HO) 25 g is mixed well, and the wasabi extract (Nippon Terpene Co., Ltd.) 1
After adding 0 g and mixing well, methyl alcohol 45 was added.
g was added to prepare a gel composition.

Example 2 A methoxymethylated polyamide (Fine Resin F, manufactured by Lead City Co., Ltd.) was used as a gelling agent.
R) 20 g and 35 g of 2-hydroxyethyl methacrylate (manufactured by Kyoeisha Co., Ltd., light ester HO) were mixed well, and 10 g of wasabi extract (manufactured by Nippon Terpene Co., Ltd.) was added to the mixed solution. 35 g of alcohol was added to prepare a gel composition.

Example 3 A methoxymethylated polyamide (Fine Resin F, manufactured by Lead City Co., Ltd.) was used as a gelling agent.
R) 20 g and 2-hydroxyethyl methacrylate (Kyoeisha Co., Ltd., Light Ester HO) 40 g are mixed well, and 5 g of wasabi extract (manufactured by Nippon Terpene Co., Ltd.) is mixed with Godball E-6C (Suzuki Yushi Kogyo Co., Ltd.) in the mixed solution. What is supported on 5 g of inorganic porous fine particles manufactured by Co., Ltd. 1
After adding 0 g and mixing well, methyl alcohol 30
g was added to prepare a gel composition.

Comparative Example 1 A gel composition of Comparative Example 1 was prepared by using 130 g of an aromatic / deodorant containing carrageenan as a gelling agent (available from Kobayashi Pharmaceutical Co., Ltd., Sawasdee Lime). This product is for toilets and contains fragrances, plant extracts, amphoteric surfactant type deodorants, nonionic surfactants, pigments and carrageenan as components.

Comparative Example 2 As a gelling agent, 150 g of a deodorant (available from Kobayashi Pharmaceutical Co., Ltd., unscented space) whose main component was a water-absorbing resin was used as the gel composition of Comparative Example 2. This product is intended for indoors, toilets, and pets, and contains, as components, an amphoteric surfactant type deodorant, a plant extract, a water absorbent resin, and a nonionic surfactant.

(Test Example 1) The gel compositions of Examples 1 to 3 and Comparative Examples 1 and 2 were placed in a mesh bag,
The gel composition was attached to a tap, and the tap water was continuously allowed to flow to measure the time during which the shape of the gel composition collapsed. Water flow is 1
The goal was about 10 liters per minute. The results are shown in Table 1.
As shown in the above, the comparative example collapsed after 1 hour, but the product of the present invention did not collapse for 80 hours or more.

[0025]

[Table 1]

Example 4 A methoxymethylated polyamide (Fine Resin F, manufactured by Lead City Co., Ltd.) was used as a gelling agent.
R) 20 g and 2-hydroxyethyl methacrylate (Kyoeisha Co., Ltd., Light Ester HO) 25 g were mixed well, and to this mixed solution, wasabi extract (manufactured by Nippon Terpene Co., Ltd.) 5 g was added and mixed well. 50 g of alcohol was added to prepare a gel composition.

Example 5 A methoxymethylated polyamide (Fine Resin F, manufactured by Lead City Co., Ltd.) was used as a gelling agent.
R) 20 g and 2-hydroxyethyl methacrylate (Kyoeisha Co., Ltd., Light Ester HO) 40 g are mixed well, and 5 g of wasabi extract (manufactured by Nippon Terpene Co., Ltd.) is mixed with Godball E-6C (Suzuki Yushi Kogyo Co., Ltd.) in the mixed solution. What is supported on 5 g of inorganic porous fine particles manufactured by Co., Ltd. 1
After adding 0 g and mixing well, methyl alcohol 30
g was added to prepare a gel composition.

Example 6 As a gelling agent, methoxymethylated polyamide (Fine Resin F, manufactured by Lead Co., Ltd.)
R) 20 g and 2-hydroxyethyl methacrylate (Kyoeisha Co., Ltd., Light Ester HO) 40 g are mixed well, and 8 g of wasabi extract (manufactured by Nippon Terpene Co., Ltd.) is mixed with Godball E-6C (Suzuki Yushi Kogyo Co., Ltd.) in the mixed solution. What is supported on 8 g of inorganic porous fine particles manufactured by Co., Ltd. 1
After adding 6 g and mixing well, methyl alcohol 24
g was added to prepare a gel composition.

Test Example 2 30 g of each of the gel compositions of Examples 4 to 6 and Comparative Examples 1 and 2 was mixed with 10 k of rice.
g were placed in a rice chest containing 50 g, and 50 mosquitoes (obtained from the storage and insect pest laboratory of the Distribution Conservation Department, Food Research Institute, Ministry of Agriculture, Forestry and Fisheries) were released, and their repellent effect was observed. It was determined to be effective when repelling 90% of insects. The period during which the gel composition was present was also observed. As shown in Table 2, as shown in Table 2, in Comparative Example, the duration of the gel composition and the duration of the repellent effect of the black elephant worm were also about 1 month.
All were more than three months.

[0030]

[Table 2]

[0031]

The gel composition containing the methoxymethylated polyamide and 2-hydroxyethyl methacrylate of the present invention is sparingly soluble in water. Even if placed inside, the active ingredient of the functional substance gradually flows out without breaking its shape, so that its efficacy can be maintained for a long period of time. In addition, since it does not contain a chlorine-based compound, it does not generate odor and can be said to be a very excellent functional substance holding material.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an example of hollow anhydrous silicic acid porous fine particles containing a functional substance of the present invention.

FIG. 2 is a cross-sectional view illustrating an example of non-hollow anhydrous silicic acid porous microparticles containing the functional substance of the present invention.

[Explanation of symbols]

 1. 1. Silicic anhydride porous fine particles Functional substance 3. Vacancies 5. Void

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Ryuji Teraoka 1-19-1-2 Hanayashiki, Kawanishi-shi, Hyogo (72) Inventor Norio Arai 132 132 Makishima-cho, Uji-city, Kyoto Pref. 72) Inventor Katsuhiko Okuda 132, 11-11 Makijima-cho, Uji-city, Kyoto Prefecture (72) Inventor Hideaki Shimizu 1-5-10-401 Minami-Eguchi, Higashi-Yodogawa-ku, Osaka-shi, Osaka F-term (reference) 4C080 AA03 BB02 BB03 BB04 BB05 BB06 CC01 HH06 JJ03 KK08 LL03 LL06 MM31 NN01 NN04 NN05 NN06 NN23 NN26 NN28

Claims (3)

[Claims] 1. A gel composition comprising a methoxymethylated polyamide and 2-hydroxyethyl methacrylate as a gelling agent. 2. A methoxymethylated polyamide as a gelling agent,
A gel composition comprising 2-hydroxyethyl methacrylate and a functional substance. 3. A gel composition comprising the functional substance according to claim 2 supported on porous fine particles.