JPH08283147A - Aqueous tacky agent composition - Google Patents

Abstract

PURPOSE: To obtain a composition capable of giving persistently proper refreshing feeling without causing pain and redness of skin when applied to skin as an external preparation. CONSTITUTION: This composition is obtained by blending an aqueous tacky base containing a crosslinked body between a polyacrylic acid and a polyacrylic acid salt with a refreshing agent such as 1-menthol and essential oils such as fennel oil, star-anise oil, cinnamon oil, clove oil, thyme oil, turpentine oil, chenopodium oil, oleum moslae, eucalyptus oil, lavender oil, lemon oil, orange oil, neroli oil, bergamot oil, rose oil, citronella oil, lemongrass oil, camphor oil and geranium oil.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aqueous pressure-sensitive adhesive composition having enhanced refreshing feeling persistence.

[0002]

2. Description of the Related Art Conventionally, an aqueous pressure-sensitive adhesive composition has been used as an external preparation such as a poultice sheet which gives a cooling sensation when applied to the skin. The cooling sensation is given to some extent by the water content contained in the water-based adhesive base, but in the case of a poultice sheet etc., the support (backing) is applied, so that it does not absorb the heat of vaporization due to the evaporation of water. That there is a limit,
In addition, since the base itself is warmed with time due to body temperature, its strength and durability are limited only by the cooling sensation caused by water.

In addition, a low boiling point solvent such as ethanol is also blended in an aqueous adhesive base, and in this case, the cold sensation upon application to the skin is given by volatilization of the low boiling point solvent. The cooling sensation due to is quite strong, so although a cooling satisfactorily satisfactory in terms of strength can be obtained, the cooling sensation is lost immediately after the low boiling point solvent has evaporated,
There was a problem in terms of its sustainability.

In order to solve such a problem, a cooling agent such as l-menthol has been added to the aqueous pressure-sensitive adhesive composition as a substance that imparts a cooling sensation. You can get a certain amount of coolness,
The refreshing feeling itself is not always sufficient. Here, it is possible to increase the blending amount of the cooling agent in order to increase the duration, but in this case, the duration of the refreshing feeling is improved, but the refreshing feeling in the initial stage at the time of skin application is too strong. However, "pain" may be felt rather than a refreshing feeling, and skin disorders such as redness and rash may occur. Therefore, the method of increasing the refreshing agent cannot be adopted.

Further, in order to efficiently absorb a small amount of a refreshing agent from the skin, a soothing absorption promoter such as a surfactant or a fatty acid ester is further added to the water-based pressure-sensitive adhesive composition to give a proper refreshing feeling. However, it is not sufficient in terms of sustaining the refreshing feeling.

The present invention has been made in view of the above circumstances, and has a proper refreshing sensation, and the refreshing sensation is not only sustained, but also does not cause redness or rash of the skin upon application to the skin and is safe. It is intended to provide an aqueous pressure-sensitive adhesive composition having excellent properties.

[0007]

Means and Actions for Solving the Problems As a result of intensive studies to achieve the above object, the present inventor has found that an aqueous adhesive base containing a crosslinked product of polyacrylic acid and polyacrylic acid salt By blending a refreshing agent such as menthol with an essential oil extracted from a plant, the refreshing feeling of the aqueous pressure-sensitive adhesive composition can be effectively maintained without causing skin pain or redness when applied to the skin. They have found the present invention and have completed the present invention.

That is, the present invention is a water-based pressure-sensitive adhesive composition comprising a water-based pressure-sensitive adhesive base containing a crosslinked product of polyacrylic acid and a polyacrylic acid salt, and a cooling agent and essential oils. Provide things. Here, the cooling agent is 1-menthol, and the essential oils are fennel oil, daisy oil, cinnamon oil, clove oil, thymian oil, turpentine oil, henoposite oil, yamazine oil, eucalyptus oil, lavender oil, lemon oil, orange oil. It is preferable to use one or two or more kinds selected from the group consisting of Toka oil, bergamot oil, rose oil, citronella oil, lemongrass oil, camphor oil and geranium oil.

The present invention will be described in more detail below. The aqueous pressure-sensitive adhesive composition of the present invention contains an aqueous pressure-sensitive adhesive base, a cooling agent and essential oils as essential components. here,
As the aqueous pressure-sensitive adhesive base of the present invention, an aqueous pressure-sensitive adhesive base containing a crosslinked product of polyacrylic acid and polyacrylic acid salt is used. This water-based adhesive base has a high water content, and
The adhesiveness to the skin is also excellent, and in particular, the combination of the cooling agent of the present invention and the essential oils provides a remarkable effect of maintaining a refreshing feeling.

The cross-linked product of polyacrylic acid and polyacrylic acid salt is not particularly limited and known ones can be used. For example, JP-A-59-110614 and 59-59.
-110616, 59-110617, 60-
No. 99180, No. 60-260512, No. 60-26.
An aqueous pressure-sensitive adhesive base containing a metal crosslinked body of polyacrylic acid and polyacrylic acid salt described in Japanese Patent No. 0513 is preferable.

Concretely, any one can be used as the polyacrylic acid of the aqueous pressure-sensitive adhesive base of the present invention, and its molecular weight and linear or branched shape are not particularly limited, It is preferable to use one having a molecular weight of 10,000 to 10,000,000. In addition to a polymer obtained by polymerizing ordinary acrylic acid, a partially cross-linked acrylic acid polymer such as Carbopol (trade name: manufactured by Goodrich Co., USA) can be preferably used.

As the polyacrylic acid salt, monovalent metal salts of polyacrylic acid such as sodium polyacrylate and potassium polyacrylate, monoethanolamine polyacrylate, diethanolamine polyacrylate, triethanolamine polyacrylate, etc. 1 or 2 such as amine salt of polyacrylic acid and ammonium salt of polyacrylic acid
More than one species may be preferably used.

The compounding ratio (weight ratio) of polyacrylic acid and polyacrylic acid salt is preferably 1: 0.1 to 1:10, and particularly preferably 1: 1 to 1: 9. An acid or salt partially neutralized so that the polyacrylic acid salt has the above ratio may be used. The total amount of polyacrylic acid and polyacrylic acid salt is 0.5 to 20% (% by weight, the same applies hereinafter) of the total composition, especially 1%.
It is preferable to be -15%, and if it is less than 0.5%, the adhesive force may be insufficient, and if it exceeds 20%, the viscosity becomes high, which may cause a problem in workability during manufacturing.

Here, the aqueous pressure-sensitive adhesive base of the present invention uses a product obtained by crosslinking polyacrylic acid and a polyacrylic acid salt by adding an appropriate crosslinking agent. As such a crosslinking agent, The type is not particularly limited as long as it can crosslink the polyacrylic acid and the polyacrylic acid salt, but a polyvalent metal compound is particularly preferably used. In this case, a magnesium compound, a calcium compound, a zinc compound, a cadmium compound, an aluminum compound, a titanium compound, a tin compound, an iron compound, a chromium compound, a manganese compound, a cobalt compound, a nickel compound or the like can be used as the polyvalent metal compound. The aqueous pressure-sensitive adhesive composition of the present invention is applied to the skin, and it is particularly preferable to use an aluminum compound, a magnesium compound, a calcium compound or the like in consideration of the safety to the skin.

In this case, any of aluminum compounds, magnesium compounds and calcium compounds can be preferably used. Examples thereof include alums such as potassium alum, ammonium alum, iron alum, aluminum hydroxide, aluminum sulfate, aluminum chloride and aluminum. Glycinate, aluminum acetate, aluminum oxide, aluminum metasilicate, calcium hydroxide, calcium carbonate, calcium sulfate, calcium nitrate, calcium chloride, calcium acetate, calcium oxide, calcium phosphate, magnesium hydroxide, magnesium carbonate,
One or more of water-soluble compounds such as magnesium sulfate, magnesium acetate, synthetic hydrotalcite, double salts containing these metals, and slightly water-soluble compounds may be used. Also,
An antacid containing aluminum or magnesium may be blended as the polyvalent metal compound.

The suitable amount of the above-mentioned cross-linking agent to be mixed varies depending on the kind thereof. For example, when the above-mentioned polyvalent metal compound is used, the amount is 0.001 of the total composition.
It is preferably set to 10%, particularly 0.01 to 5%.
If it is less than 0.001%, the cohesive force of the composition may decrease, and if it exceeds 10%, the adhesive force may decrease.

The water content of the aqueous pressure-sensitive adhesive base is preferably 30% or more, and more preferably 35 to 75%. If it is less than 30%, a sufficient cooling sensation due to the aqueous pressure-sensitive adhesive base may not be obtained.

A cellulose derivative and a polyhydric alcohol may be added to the aqueous pressure-sensitive adhesive base of the present invention within a range that does not impair the effects of the present invention. In this case, any cellulose derivative may be used. For example, one or more of alkali metal salts of carboxymethyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, methyl cellulose and the like can be used, but especially alkali metal salts of carboxymethyl cellulose such as sodium carboxymethyl cellulose and potassium carboxymethyl cellulose are used. It can be preferably used. When the cellulose derivative is added, its content is preferably 15% or less of the total composition.
If it exceeds 15%, the viscosity becomes high, which may cause a problem in workability during production. As the polyhydric alcohol, any of those usually used may be used, for example, glycerin, sorbitol, ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, polypropylene glycol, 1,3-propanediol, 1, 4-butanediol, maltitol, xylitol, etc. 1 or 2
More than one species may be used. When the polyhydric alcohol is added, its content is preferably 50% or less of the total composition. If it exceeds 50%, the cohesive force of the aqueous pressure-sensitive adhesive base decreases, and the aqueous pressure-sensitive adhesive base may remain on the adherend during peeling.

Next, the type of the cooling agent of the present invention is not limited as long as it is a substance that gives a refreshing feeling, and examples of such a cooling agent include l-menthol and N-substituted-p. -Mentane-3-carboxamide, 3-substituted-p
-Menthane, 2- or 3-substituted-p-menthane diol, trialkyl-substituted cyclohexanecarboxyamide and the like can be mentioned, and these can be used alone or in combination of two or more. Of these, 1-menthol is particularly preferable because it gives a strong refreshing feeling, and it is preferable to use 1-menthol alone or in combination with another cooling agent. When 1-menthol is used, 1-menthol itself may be blended, or may be blended as it is contained in the essential oil as a perfume ingredient, for example, as peppermint oil.
You may use these together.

The content of the above-mentioned cooling agent is preferably 0.001 to 5%, and more preferably 0.01 to 2% of the total composition. If it is less than 0.001%, the refreshing sensation is improved to some extent by blending the essential oils, but the refreshing sensation of the composition as a whole may be poor, and if it exceeds 5%, the irritation to the skin may be increased. .

As the essential oils of the present invention, any of those commonly used as an essential oil component extracted from plants can be used, but in particular, fennel oil, daisy oil,
Cayhi oil, clove oil, thymian oil, turpentine oil, henopoji oil, yamazine oil, eucalyptus oil, lavender oil, lemon oil, orange oil, toka oil, bergamot oil, rose oil, citronella oil, lemongrass oil, camphor oil, geranium oil. It is preferable to use one selected from the above or a mixture of two or more thereof.

In detail about the above essential oils, fennel oil is also called fennel oil, and is obtained from fennel fruits or whole grass by steam distillation or the like. It is also known as star anise oil, and it is an oil of the magnolia family Illici.
um verm Hook. fil. Obtained from the fruit of. Cayhi oil is a general term for essential oils obtained from the plant of Cinnamomum of the genus Camphora, but in the present invention, Cin is used.
nammum cassia (Nees) Nees
et Blume leaves and branches such as cassia oil or cinnamon oil, C.I. zeylanicum Nees
The cinnamon oil obtained from the bark and leaves of the above is suitable. Clove oil is also known as clove oil, and is an Eug of the peach family
nia caryophyllata Thunb.
Obtained from buds, floral patterns and leaves.

Chimian oil, also called Periwinkle oil, thyme oil or thyme oil, is obtained from the whole plant of Periwinkle plant of the Labiatae family. Turpentine oil is obtained from pine tar, pine branches, etc. Henopositi oil is obtained from the seeds or whole plants of the goldenrod of the family Chenopodiaceae. Yamajin oil is obtained from whole plants such as Yamazoi of the Labiatae family, Shilobana Yamajizo (Aoyamajizo), Himejiso, and Shiagemehimeso. Eucalyptus oil is an essential oil obtained from the leaves and branches of Eucalyptus plants of the family Fusarium. Lavender oil is Lavandu of Lamiaceae
la officinalis Chaix et V
Obtained from the spikes of illers (L. vera DC.). Lemon oil is obtained by squeezing lemon fruits of the Rutaceae family.

Orange oil is obtained by squeezing the peel of a citrus plant, and is a sweet orange oil and a Citr obtained from Citrus aurantium.
bitter o obtained from usbigaradia
There is a range oil etc. Toka oil is also called neroli oil, and is Citrus bigaradia of the citrus family.
Obtained from the fresh flowers of. Bergamot oil is obtained by squeezing the rind of the mature fruit of the Rutaceae Citrus bergamia. Rose oil is also called rose oil and belongs to Rosaceae Rosa damascena Mil
l. , Rosacentifolia L .; Obtained from the flowers of plants such as.

Citronella oil is Cymbopog of the grass family
on winterianus, Cymbopogon
Obtained from whole grass of Nardus. Lemongrass oil is Cymbopogon flexusus Sta, which is a plant of the genus Cymbogagon of the family Gramineae.
pf, Cymbopogon citralus St
It is obtained from apf or the like. Camphor oil is obtained from various parts of the camphor tree of the camphoraceae family. Geranium oil is a P of Furoaceae
elargonium graveolens L. , P
elargonium radula, Pelargo
nium peniculatum, Pelargo
It is obtained from leaves such as aluminum denticulatum.

The blending amount of the above essential oils is such that the weight ratio of the refreshing agent to the refreshing agent is as follows: refreshing agent: essential oils = 1: 0.1-10.
It is particularly preferable to set the amount to be 1: 0.5 to 5. If the ratio of essential oils is less than 0.1, it may be difficult to obtain the effect of adding essential oils, and if it exceeds 10, skin irritation due to the cooling agent may occur. Further, the total composition of 0.
It is preferably 001 to 5%, particularly preferably 0.03 to 2%. If it is less than 0.001%, it may be difficult to obtain the effect of adding essential oils, and if it exceeds 5%, the adhesive strength may be poor, which may cause a problem as a product.

The water-based pressure-sensitive adhesive composition of the present invention appropriately contains, in addition to the above-mentioned essential components, other components which are usually added to poultice sheets and the like, as long as the effects of the present invention are not impaired. You can also However, the aqueous pressure-sensitive adhesive composition of the present invention is used for the purpose of imparting a proper and long-lasting cooling sensation by applying it to the skin, and it is essential to incorporate a medicinal component. is not.

The water-based pressure-sensitive adhesive composition of the present invention is used as an external preparation. For example, when it is used as a poultice sheet, the above components and, if necessary, other components are mixed with water and kneaded well. To prepare a paste, which is applied to a backing of paper, woven cloth, non-woven cloth, plastic film or the like, and if necessary coated with facing such as polyethylene film to obtain a product.

[0029]

The water-based pressure-sensitive adhesive composition of the present invention comprises a water-based pressure-sensitive adhesive base containing a crosslinked product of polyacrylic acid and polyacrylate having a high water content, and a cooling agent and essential oils. As a result, when applied to the skin as an external preparation, it is possible to obtain a moderate and excellent refreshing sensation without causing skin pain or redness.

[0030]

EXAMPLES The present invention will be specifically described below by showing Examples and Comparative Examples, but the present invention is not limited to the following Examples.

[Examples 1 to 25] The components shown in Tables 1 and 2 were placed in a mixer and sufficiently stirred until a paste was formed to prepare an aqueous pressure-sensitive adhesive composition.
It was evenly applied so as to be g / m ² , and the polyethylene film was faced to produce a poultice sheet.
The following sensory test was conducted with 10 professional panelists as subjects for the strength and sustainability of the refreshing feeling when each compress sheet was attached to the skin. The results are also shown in Tables 1 and 2. In addition, when the pain and redness of the skin of the test subject was observed, no abnormality was observed. <Sensory test> Each panel was subjected to a sensory evaluation of the cool feeling every 0.5, 1, 2, 3, 4, 5 hours after the application of the compress to the skin, based on the following evaluation criteria. Evaluation criteria: 0: No cold sensation 1: Cold sensation but extremely weak 2: Weak cold sensation 3: Cool sensation 4: Clear cold sensation 5: Strong cold sensation 6: Strong There is too much cold sensation

The strength of the refreshing feeling was determined by averaging the highest scores of the panelists. In addition, the area under the refreshing feeling evaluation point-time curve up to 5 hours was calculated by the trapezoidal method and used as an index of the refreshing feeling strength. The sustainability of the refreshing sensation was determined by using the average value of the time when two or more points were continued in the above evaluation criteria as an index.

[0033]

[Table 1]

[0034]

[Table 2]

[Comparative Examples 1 to 20] By the same method as in the above Examples, poultice sheets were obtained from the aqueous pressure-sensitive adhesive compositions having the compositions shown in Tables 3 to 5. The same sensory test as described above was performed on each poultice sheet. In Comparative Examples 19 and 20, as the aqueous pressure-sensitive adhesive base, those not containing a cross-linked product of polyacrylic acid and polyacrylic acid salt were used. The results are also shown in Tables 3-5. In addition, when the subject's skin pain and redness were observed, in Comparative Example 2, 8 out of 10 complained of "pain" at the time of application.

[0036]

[Table 3]

[0037]

[Table 4]

[0038]

[Table 5]

From the results shown in Tables 1 to 5, the water-based pressure-sensitive adhesive composition of the present invention can provide a proper refreshing sensation when applied to the skin as a poultice sheet, and the refreshing sensation is It was confirmed that it lasted for a long time, and that neither skin pain nor redness occurred. On the other hand, when only the cooling agent is added to the water-based adhesive base (Comparative Examples 1 and 2), a satisfactory refreshing feeling cannot be obtained, or the skin causes pain, and only the essential oils are added to the water-based adhesive base. When it was done (Comparative Examples 3 to 18) and when an aqueous pressure-sensitive adhesive base containing no crosslinked product of polyacrylic acid and polyacrylic acid salt was used (Comparative Examples 19 and 20), a satisfactory refreshing feeling cannot be obtained. Was confirmed.

Claims (5)

[Claims] 1. A water-based pressure-sensitive adhesive composition comprising a water-based pressure-sensitive adhesive base containing a crosslinked product of polyacrylic acid and a polyacrylic acid salt, and a cooling agent and essential oils. 2. The aqueous pressure-sensitive adhesive composition according to claim 1, wherein the cooling agent is 1-menthol. 3. The aqueous pressure-sensitive adhesive composition according to claim 1, wherein the weight ratio of the cooling agent to the essential oils is 1: 0.1-10. 4. The essential oils are fennel oil, daisy oil, cinnamon oil, clove oil, thymian oil, turpentine oil,
Henoposit oil, Yamadine oil, Eucalyptus oil, Lavender oil,
The aqueous solution according to claim 1, 2 or 3, which is one or more selected from lemon oil, orange oil, toka oil, bergamot oil, rose oil, citronella oil, lemongrass oil, camphor oil and geranium oil. Adhesive composition. 5. The water-based pressure-sensitive adhesive composition according to any one of claims 1 to 4, wherein the amounts of the cooling agent and the essential oils are each 0.001 to 5% by weight of the total composition.