JP2008208169A - Composition for removing pressure-sensitive adhesive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a composition for removing a pressure-sensitive adhesive with little irritation to skin capable of effectively removing the pressure-sensitive adhesive remaining on the skin surface while protecting the skin. <P>SOLUTION: The composition for removing the pressure-sensitive adhesive is obtained by including a fatty acid ester and a vegetable oil in a mixture using a liquid paraffin having 10-50 viscosity (mPa s, 25°C) and a liquid paraffin having 0-5 viscosity (mPa s, 25°C) in combination thereof. The mixture of the liquid paraffin having 10-50 viscosity (mPa s, 25°C) and the liquid paraffin having 0-5 viscosity (mPa s, 25°C) accounts for 70-95 mass% of the total amount in the composition for removing the pressure-sensitive adhesive. The mixing ratio of the liquid paraffin having 10-50 viscosity (mPa s, 25°C) and the liquid paraffin having 0-5 viscosity (mPa s, 25°C) is (15:85) to (85:15). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pressure-sensitive adhesive removing composition, and particularly relates to a composition suitable for removing a pressure-sensitive adhesive from a medical tape remaining on the skin surface.

To remove the adhesive remaining on the adherend when the industrial or stationery adhesive tape affixed to the adherend is removed, it can be dissolved using an organic solvent such as toluene, benzene, or formalin. The removal method using an organic solvent is generally commercially available.
On the other hand, when a medical adhesive tape affixed to the skin surface is peeled off, there are few suitable items for removing the adhesive remaining on the skin surface, and benzine is used in many medical sites. Is the actual situation. However, this benzine is irritating to the skin, and there are great concerns about safety.

For this reason, an aqueous remover in which polyoxyethylene isostearyl ether and butoxyethanol are mixed with water has also been proposed in order to remove the adhesive having fixed wigs from the scalp. (Patent Document 1)
JP 2002-167568 A

  The present invention seeks to obtain an adhesive that can effectively remove the adhesive remaining on the skin surface while protecting the skin with little irritation to the skin.

In the present invention, a fatty acid ester and vegetable oil are contained in a mixture of liquid paraffin having a viscosity of 10 to 50 (mPa · s, 25 ° C.) and liquid paraffin having a viscosity of 0 to 5 (mPa · s, 25 ° C.). Thus, a pressure-sensitive adhesive removing composition can be obtained.
The mixture of liquid paraffin having a viscosity of 10 to 50 (mPa · s, 25 ° C.) and liquid paraffin having a viscosity of 0 to 5 (mPa · s, 25 ° C.) is 70 in the total amount of the pressure-sensitive adhesive removing composition. The mixing ratio of the liquid paraffin having a viscosity of 10 to 50 (mPa · s, 25 ° C.) and the liquid paraffin having a viscosity of 0 to 5 (mPa · s, 25 ° C.) is 15:85. ˜85: 15.

  According to the present invention, the adhesive remaining in the adhesive can be sufficiently removed. In particular, the adhesive remaining on the skin surface after peeling off the medical tape can be easily removed, there is less irritation to the skin, less odor, and no excessive removal of lipids on the skin surface. The state of the skin surface can be maintained healthy.

In the present invention, liquid paraffin is used. This liquid paraffin has a viscosity of 10 to 50 (mPa · s, 25 ° C.) and a viscosity of 0 to 5 (mPa · s, 25). ° C) liquid paraffin.
The liquid paraffin having a low viscosity mainly improves the penetration into the pressure-sensitive adhesive, and the liquid paraffin having a high viscosity is considered to contribute mainly to softening the pressure-sensitive adhesive to remove the paste.
As the liquid paraffin having a low viscosity, it is preferable to use light liquid isoparaffin.
The mixing ratio of the liquid paraffin with a high viscosity and the liquid paraffin with a low viscosity varies depending on the properties of the pressure-sensitive adhesive, but is usually about 15:85 to 85:15, and preferably about 20:80 to 80:20. is there.

  The liquid paraffin mixture is used in an amount of about 70 to 95% by mass, preferably in an amount of about 75 to 90% by mass, based on the total amount of the pressure-sensitive adhesive removing composition.

Fatty acid ester and vegetable oil are added to the liquid paraffin mixture. The fatty acid ester and the vegetable oil are those that can be used without limitation in terms of formulation in all categories of cosmetics according to the permission standards for cosmetic varieties.
As these fatty acid esters, monobasic acid esters, dibasic acid esters, tribasic acid esters, and the like can be used. For example, isopropyl palmitate, isopropyl myristate, isostearyl palmitate, myristyl myristate, Cetyl palmitate, octyldodecyl myristate, ethylhexyl stearate, triethylhexyl citrate, ethyl linoleate, isopropyl linoleate, cholesteryl stearate, butyl myristate, butyl stearate, cetyl isooctanoate, diethyl sebacate, diisopropyl adipate, Diisopropyl sebacate, diisostearyl malate, ethyl olive oleate, hexyldecyl isostearate, hexyldecyl myristate, hexyl stearate Decyl can be mentioned ethylhexyl palmitate, isopropyl isostearate, and the like.
These fatty acid esters may be used alone or in admixture of two or more kinds. The total amount of the pressure-sensitive adhesive removing composition is about 5 to 20% by mass, preferably 7 to 12% by mass. It should be used in a certain amount.
This fatty acid ester also contributes to improving the wiping property when the liquid remaining on the skin is wiped off with tissue paper after using the present composition.

Examples of the vegetable oil include palm oil, hydrogenated palm oil, avocado oil, olive squalane, olive oil, apricot oil, kukui nut oil, grape seed oil, safflower oil, sweet almond oil, corn germ oil, pistachio seed oil, sunflower Oil, hazelnut oil, jojoba oil, macadamia nut oil, meadow foam oil, rosehip oil, and the like.
These vegetable oils may be used alone or in admixture of two or more kinds. The total amount of the pressure-sensitive adhesive removing composition is about 0.5 to 10% by mass, preferably 0.7 to It may be used in an amount of about 3% by mass.
The fatty acid ester and vegetable oil are mainly effective in protecting the skin, maintaining its moisturizing state, and maintaining flexibility.

  Tocopherol is preferably further added to the liquid paraffin mixture. This tocopherol is said to be vitamin E and is used in a small amount of about 0.01 to 0.1% by mass in the total amount of the pressure-sensitive adhesive removing composition, and mainly preserves by preventing oxidation of the composition. It is effective in enhancing the nature and sustaining the effect.

  Any of the compositions contained in the above-mentioned pressure-sensitive adhesive removing composition can be used without any restrictions on formulation in all categories of cosmetics according to the permissible varieties of cosmetic varieties. Even if there is, there is no harm and it can be used safely.

A liquid adhesive removing composition can be obtained by blending each of the above-described compositions and mixing them well. This pressure-sensitive adhesive removing composition is usually easy to use when packed in a container such as a bottle, packed in a spray container without a propellant, or packed in a spray container using a propellant.
When using this pressure-sensitive adhesive removing composition, it may be removed by directly sprinkling and rubbing the remaining part of the pressure-sensitive adhesive, but usually the tissue paper, gauze, absorbent cotton, etc. are soaked with this pressure-sensitive adhesive removing composition. First of all, the adhesive removal composition is soaked by lightly tapping on the adhesive that has been left unattached, and then repeatedly lightly rubbed to remove the adhesive cleanly from the skin surface. Can do.

In preparing Examples and Comparative Examples, the following composition materials were prepared.
1. High-viscosity liquid paraffin (viscosity: 20 mPa · s, 25 ° C)
2. Light liquid isoparaffin (viscosity: 0 mPa · s, 25 ° C)
3. Fatty acid ester: ethylhexyl palmitate4. 4. Vegetable oil (1): Macadamia nut oil Vegetable oil (2): safflower oil Tocopherol (Vitamin E)
7). Tocopherol acetate 8. Benzene (normal hexane)

(Examples 1-3, Comparative Examples 1-4)
Using the above-described composition materials, Examples 1 to 3 were prepared according to the composition shown in Table 1, and adhesive removal compositions of Comparative Examples 1 to 4 were prepared according to the composition shown in Table 2.

(test)
About the adhesive removal composition of Examples 1-3 and Comparative Examples 1-4, in order to see the property and performance, the following tests were done.
Moreover, the following were prepared as an adhesive.
(1) Rubber adhesive: natural rubber / tackifying resin = 100/70 (parts by weight)
(2) Acrylic pressure-sensitive adhesive: toluene solution polymerization of isononyl acrylate / acrylic acid = 96/4 (part by weight) + epoxy-based cross-linking agent (single molecule, tetrafunctional) 0.03 (part by weight)

(Viscosity of adhesive removing composition)
Based on JIS Z 8803, the viscosity was measured at a speed of 60 rpm at 25 ° C. using rotor # 1 with a BM viscometer.

(Paste removal force 1) (vs. bakelite plate)
Prepare a sheet of 9 mm x 100 mm with the above rubber adhesive applied to a thickness of 50 µm on a release paper, place it on a 37 mm x 125 mm bakelite plate from the rubber adhesive side, and apply pressure. Affixed, peeled off the release paper 20 minutes later, and left the pressure-sensitive adhesive on the bakelite plate as an evaluation sample.
Moreover, what prepared the thing which apply | coated the said acrylic adhesive to the thickness of 50 micrometers in the magnitude | size of 9 mm x 100 mm on release paper is prepared, and let others be an evaluation sample similarly to the case of the said rubber adhesive.
Next, after the commercially available tissue paper (Daiou Paper Co., Ltd.) was sufficiently impregnated with each of the pressure-sensitive adhesive removal compositions of Examples and Comparative Examples, the surface of the pressure-sensitive adhesive on the bakelite plate was rubbed lightly. The number of reciprocating rubbing until the adhesive can be removed is defined as the debonding force.
When the pressure-sensitive adhesive removing composition soaked in the tissue paper soaks into the pressure-sensitive adhesive and becomes difficult to rub, the pressure-sensitive adhesive removing composition is again soaked in the tissue paper and the rubbing operation is repeated.

(Paste removal force 2) (to the skin surface)
Prepare a rubber-coated adhesive coated on the release paper in the same manner as above, and apply it by pressing it onto the skin surface of the upper arm from the rubber-coated adhesive side. What left the adhesive on the surface is used as an evaluation sample.
Otherwise, the degreasing force is measured in the same manner as in the case of the degreasing force 1 described above.

(Slip test)
The strength of the slip resistance was measured when the adhesive was rubbed with a tissue paper soaked with the adhesive removing composition.
Evaluation was performed based on the following criteria.
No slip resistance ... ◎
Less slip resistance ...
There is a little slip resistance ... △
Strong sliding resistance

(Odor test)
The sensory test was done about the smell of the adhesive removal composition.
Evaluation was performed based on the following criteria.
Good smell or no smell ... ◎
Slightly good odor ...
Slightly unpleasant odor ... △
There is an unpleasant odor ... ×

(Skin irritation test)
The presence or absence of irritation to the skin was examined when the test of “adhesive strength · 2 (to the skin surface)” was conducted.
Evaluation was performed based on the following criteria.
No irritation ...
Almost no irritation ... ○
Irritation ...
Strong irritation ...

(Test results)
The results of each test are shown in Tables 1 and 2.

(Discussion)
In Examples 1 to 3 of Table 1, both the degreasing force 1 and the degreasing force 2 are good, the slipperiness is good, the odor is small, the skin irritation is small, and good results are obtained. It has been. In particular, those of Examples 1 and 2 are easy to use.
On the other hand, in the case of using the high viscosity liquid paraffin of Comparative Example 1 shown in Table 2, the slipperiness, odor, and skin irritation are good, but it is preferable because the degreasing force 1 and the degreasing force 2 are low. Absent. In the case of using the light liquid isoparaffin of Comparative Example 2, the degreasing force 1 and the degreasing force 2 are high, but the skin irritation is not good. The thing of the comparative example 3 has low paste removal power 1 and paste removal power 2 and is inferior in slipperiness. It can be seen that the benzine of Comparative Example 4 has good slipperiness and high paste removal power 1 and paste removal power 2 but has an unpleasant odor and strong skin irritation.

Claims (6)

  A pressure-sensitive adhesive removing composition comprising a mixture of liquid paraffin having a viscosity of 10 to 50 (mPa · s, 25 ° C.) and liquid paraffin having a viscosity of 0 to 5 (mPa · s, 25 ° C.) containing a fatty acid ester and vegetable oil. .   A mixture of liquid paraffin having a viscosity of 10 to 50 (mPa · s, 25 ° C.) and liquid paraffin having a viscosity of 0 to 5 (mPa · s, 25 ° C.) is 70 to 95% by mass in the total amount of the pressure-sensitive adhesive removing composition. The mixing ratio of the liquid paraffin having a viscosity of 10 to 50 (mPa · s, 25 ° C.) and the liquid paraffin having a viscosity of 0 to 5 (mPa · s, 25 ° C.) is 15:85 to 85:15. Item 2. The pressure-sensitive adhesive removing composition according to Item 1.   The pressure-sensitive adhesive removing composition according to claim 1 or 2, wherein the liquid paraffin having a viscosity of 0 to 5 (mPa · s, 25 ° C) is light liquid isoparaffin.   The fatty acid ester is isopropyl palmitate, isopropyl myristate, isostearyl palmitate, myristyl myristate, cetyl palmitate, octyldodecyl myristate, ethylhexyl stearate, triethylhexyl citrate, ethyl linoleate, isopropyl linoleate, stearic acid Cholesteryl, butyl myristate, butyl stearate, cetyl isooctanoate, diethyl sebacate, diisopropyl adipate, diisopropyl sebacate, diisostearyl malate, ethyl olive oleate, hexyl decyl isostearate, hexyl decyl myristate, hexyl stearate At least one selected from the group of decyl, ethylhexyl palmitate, and isopropyl isostearate PSA removal composition according to any one of Motomeko 1-3.   The above vegetable oils are palm oil, hydrogenated palm oil, avocado oil, olive squalane, olive oil, apricot kernel oil, kukui nut oil, grape seed oil, safflower oil, sweet almond oil, corn germ oil, pistachio seed oil, sunflower oil, hazelnut It is at least 1 chosen from the group of oil, jojoba oil, macadamia nut oil, meadow foam oil, and rosehip oil, The adhesive removal composition in any one of Claims 1-4.   The said adhesive removal composition removes the adhesive of the medical tape which remains on the skin surface, The adhesive removal composition in any one of Claims 1-5.