JP6006030B2 - Method for removing silicone-based surface treatment agent from silicone-coated fiber, and release agent suitable for the method - Google Patents

Description

  The present invention relates to a method for removing a silicone-based surface treatment agent from a fiber (hereinafter also referred to as a silicone-coated fiber) obtained by applying a silicone-based surface treatment agent on the surface, and a release agent suitable for the method.

  Conventionally, for the purpose of improving the flexibility, water repellency, hand feeling, etc., a silicone-based surface treatment agent such as silicone oil or a crosslinking type silicone has been applied to the surface of a fiber such as polyester fiber. ing. The fibers subjected to such treatment are excellent in characteristics and functionality, and are used, for example, in products and bedding that resemble human hair. The development of this technology is remarkable, especially when it is applied to hair products such as hair wigs and hairbands as artificial hair, providing hair that expresses gloss, feel and functionality very close to human hair. Is possible. On the other hand, the development of an adhesive for manufacturing wigs is also progressing, for example, it has a hair fixing function for fixing the needle feet of hair that is implanted through the back of the wig base, and for the scalp An adhesive that can form an adhesive layer that can be removably bonded has been proposed (Patent Document 1).

  However, for example, when using a fiber having a silicone-based surface treatment agent applied to the surface as a wig material, it is necessary to bond the fiber to a film or a fiber net as described above. Due to the surface of the fiber used as artificial hair being coated with a silicone-based surface treatment agent, the following new problems arise. Specifically, when the silicone-coated fiber is bonded to a film or fiber net, the adhesive force is greatly impaired or substantially not bonded due to the influence of the applied silicone-based surface treatment agent. That happens. For this reason, there is a problem that it is difficult to reliably adhere the fiber to the base material using an adhesive. At present, the hair to be planted can be tied to the wire constituting the wig base. (Patent Document 2).

  Here, with regard to the technology for removing the silicone-based surface treatment agent applied to the surface, for example, silicone can be recycled for the purpose of enabling recycling of airbag scrap fabric in which an expensive polyamide base fabric is used. There is a proposal for easily and efficiently removing a silicon coating layer coated on an air bag base fabric by immersing an air bag base fabric made of polyamide fiber coated with an alkali-isopropyl alcohol solution ( Patent Document 3).

Japanese Patent No. 4560718 JP 2007-92202 A JP 2009-269475 A

  However, as described in Citation 3, when the method of immersing in alkali is applied to polyester fiber, the ester is hydrolyzed by alkali when immersed in alkaline water, and the quality is deteriorated and deteriorated. It has been known. Particularly in hair products that resemble human hair, polyester fibers are used, and in this case, they cannot be used. Polyamide fiber is also used for artificial hair, but unlike recycling airbag scrap cloth, it does not remove all of the silicon coating layer coated on the fiber surface, but the part where fiber bonding is required It is necessary to remove only the material, and the part to be removed is an important part to be bonded to the wig base. Therefore, the alteration and deterioration of the fiber must be avoided, and the above technique is applied also in this respect. It is not possible.

  Conventionally, in the manufacture of hair products, for the purpose of enhancing the adhesiveness of silicone-coated fibers, the fibers that need to be bonded (hereinafter also referred to as peeling target portions) are washed with an organic solvent or an alkaline aqueous solution. Has been done. However, the silicone oil used for the material of the surface treatment agent has strong adhesion to the applied part, and the cross-linked type silicone is chemically stable. No removal is made. Further, during washing, usually, strong wiping or mechanical stagnation operation may cause another problem that the fiber is likely to be damaged. Furthermore, this method has a problem that the loss of functionality such as flexibility, water repellency, texture, etc. is expanded to other than the adhesion target part because the cleaning part is spread in addition to the separation target part necessary for adhesion. Produce.

  For this reason, in addition to using an adhesive, the artificial hair is firmly joined to the wig base by attaching the hair to be implanted to the wire constituting the wig base as described above. It has been broken. This knotting operation is performed manually, is extremely complicated, and contributes to an increase in cost. For this reason, it is extremely useful if a technique capable of sufficiently peeling the surface treating agent only on a part of the silicone-coated fiber and thereby enabling the fiber to be bonded only with the adhesive is provided.

  Therefore, an object of the present invention is to form a silicone-based surface treatment agent applied to the part to be peeled off necessary for adhesion from the surface of the silicone-coated fiber surface in a simple manner without affecting other parts. It is to provide a technique capable of peeling and removing. Furthermore, in order to achieve this object, an object of the present invention is to find a release agent that can sufficiently remove the silicone-based surface treatment agent by a simple treatment.

  The above object is achieved by the present invention described below. That is, the present invention relates to a silicone-based surface treatment agent from a fiber that removes the applied surface treatment agent from a part of the silicone-coated fiber on which a silicone-based surface treatment agent is applied. A release agent comprising an acid having a resolution for silicone and / or a solvent having an affinity for silicone, and the surface treatment agent should be removed from the release agent. After contacting the at least part of the fiber and further allowing the release agent to contact at least a part of the fiber while leaving still or light vibration in that state, the release agent is made to conform to the fiber, A step of washing the release agent, and if necessary, a weakly alkaline solution is contacted to neutralize the remaining acid and remove the remaining silicone. It is allowed to provide a method of removing the surface treatment agent of a silicone-based, characterized in that it comprises a step for subsequently again washed.

The following method is mentioned as a preferable form of the said invention.
A method for removing a silicone-based surface treating agent, wherein the acid having a resolution with respect to silicone is alkylbenzenesulfonic acid.
The solvent having an affinity for silicone dissolves silicone, mineral terpene, naphtha, petroleum ether, toluene, benzene, xylene, cyclohexane, gasoline, kerosene, mineral spirit, methylene chloride, chloroform, carbon tetrachloride, 2- A method for removing a silicone-based surface treating agent that is at least one selected from the group consisting of ethylhexanol, diethyl ether, diisopropyl ether, methyl ethyl ketone, methyl isobutyl ketone, and amyl acetate.
The alkylbenzene sulfonic acid is at least one of dodecyl benzene sulfonic acid or paratoluene sulfonic acid, and the alkyl benzene sulfonic acid is a solvent that dissolves silicone, and is selected from the group consisting of mineral terpenes, naphtha, petroleum ether, and toluene. A method for removing a silicone-based surface treatment agent that uses, as a release agent, a material dissolved in at least one of the above-mentioned solvents.

The solvent having affinity for the silicone is selected from the group consisting of isopropanol, butanol, amyl alcohol, dioxane, glacial acetic acid, turpentine oil, machine oil, ethyl cellosolve, paraffin oil and fatty acid, which dissolves a part of the silicone. A method for removing a silicone-based surface treatment agent that is a mixed solvent with at least one solvent.
Cyclohexanol, methanol, ethanol, ethylene glycol, glycerin, acetone, water, dimethylphthalate, petrolactam, petrolactam, vegetable oil and animal oil, in which the release agent is a solvent that does not dissolve silicone in addition to a solvent having affinity for silicone A method for removing a silicone-based surface treatment agent containing at least one solvent selected from the group consisting of:
A method in which the weakly alkaline solution removes a silicone-based surface treatment agent that is a saturated aqueous solution of sodium hydrogencarbonate.

  As another embodiment, the present invention provides a release agent for use in the above-described method for removing a silicone-based surface treatment agent from a silicone-coated fiber, and an acid having a resolution with respect to silicone. There is provided a release agent which is dissolved in a solvent having affinity. Further, as a preferred form thereof, the acid having a resolution with respect to the silicone is an alkylbenzene sulfonic acid, and the solvent having an affinity for the silicone is a group consisting of mineral terpene, naphtha, petroleum ether and toluene. A release agent containing at least one selected from Moreover, the release agent whose ratio of the acid which has resolution | decomposability with respect to the said silicone and the solvent which has affinity with respect to the said silicone is a mass reference | standard, and the acid content rate in a solution is 10-70% is mentioned. .

  According to the present invention, a release agent that can sufficiently remove a silicone-based surface treatment agent by a simple treatment has been found, and by using the technique, application from the surface of a silicone-coated fiber to a part to be peeled that is necessary for adhesion is performed. It becomes possible to peel off the silicone-based surface treatment agent that has been used in a spot-like manner without reaching other portions. As a result, exfoliation can be achieved by the above method, for example, without the complicated work of tying the hair to be planted to the wire constituting the wig base, which is performed in the case of manufacturing a wig or the like. Only by adhering the adhesive to a sufficiently and spot-formed portion, the fiber having the surface coated with the silicone-based surface treatment agent can be firmly bonded.

  Hereinafter, the present invention will be described in more detail with reference to preferred embodiments. In order to solve the above-described problems of the prior art, the present inventors have a high peeling effect on a silicone-based surface treatment agent, and in addition, in a spot-like manner, the peeling does not expand other than the part to be peeled off necessary for adhesion. In order to find a drug that can be peeled off and a method of using the drug, intensive studies were conducted. As a result, silicone-based surface treatment containing silicone oil with strong adhesion to the applied part used in silicone-based surface treatment agents applied to the fiber surface and chemically stable cross-linked silicone At the same time as finding a simple method for removing silicone that can sufficiently peel off the agent in spot, a suitable release agent for the method was found and the present invention was achieved.

  First, as described above, in the method of washing with an organic solvent or an alkaline aqueous solution, which has been conventionally performed in order to improve the adhesiveness in the portion, the present inventors have used the silicone-based surface treatment agent. In view of the fact that the peeling was not sufficient, the improvement of the drug used and the method for using the drug were examined from the following viewpoints. In other words, the removal treatment significantly improves the adhesive strength of the treated portion of the fibers to the adhesive, and can achieve strong bonding with only the adhesive, and the removed portion is the target to be peeled off for adhesion. Examine from the standpoint that it does not extend to other than the part, that the removed part of the fiber is not damaged or deteriorated, and that the drug used is easy to handle and is general-purpose. It was.

  In the course of the study, the present inventors have obtained the following knowledge about a drug that can release the silicone-based surface treatment agent applied to the fiber surface. That is, from the above viewpoint, the agent useful as a release agent that can achieve the object of the present invention is, in particular, an acid having a resolution with respect to silicone or a solvent having an affinity for silicone, as listed below. I found. More specifically, examples of the acid having a resolution with respect to silicone include inorganic acids and organic acids. Particularly suitable acids for the present invention include alkylbenzenes such as dodecylbenzenesulfonic acid and paratoluenesulfonic acid. It was found to be a sulfonic acid.

  Examples of the solvent having affinity for silicone that can be used in the present invention include mineral terpenes, naphtha, petroleum ether, toluene, benzene, xylene, cyclohexane, gasoline, kerosene, mineral spirits, methylene chloride, chloroform, tetrachloride. Examples thereof include solvents capable of dissolving silicone, such as carbon, 2-ethylhexanol, diethyl ether, diisopropyl ether, methyl ethyl ketone, methyl isobutyl ketone and amyl acetate.

  According to the study by the present inventors, the release agent suitable for the present invention is an acid having a resolution with respect to the aforementioned silicone and / or a solvent having an affinity for the silicone. Among them, it is preferable to use alkylbenzenesulfonic acid such as dodecylbenzenesulfonic acid or paratoluenesulfonic acid or a solvent capable of dissolving the above-mentioned silicone.

  According to the study by the present inventors, particularly preferably, alkylbenzenesulfonic acid is used as at least one solvent selected from the group consisting of mineral terpenes, naphtha, petroleum ether and toluene, which is a solvent for dissolving silicone. The aspect which uses what melt | dissolves as a peeling agent is mentioned. As a use ratio in that case, it is preferable that the acid content in the release agent solution is 10 to 70%, more preferably 20 to 50% on a mass basis. Then, using these suitable release agents, the silicone-based surface treatment agent is removed from the silicone-coated fiber on which the silicone-based surface treatment agent is applied on the surface by the procedure described later, and then applied to the fiber surface. The present inventors have found that the silicone-based surface treatment agent can be sufficiently peeled off in a spot-like manner so as to enable adhesion with an adhesive.

  Further, the present invention is not limited to the above-described form, and a solvent capable of dissolving the above-mentioned silicone, isopropanol, butanol, amyl alcohol, dioxane, glacial acetic acid, turpentine oil, machine oil, ethyl cellosolve, paraffin oil and fatty acid It is also a preferred embodiment of the present invention to use a mixture with a solvent that dissolves a part of silicone selected from the group consisting of, and the like.

  Furthermore, it is not limited to said form, The group which consists of the solvent which can melt | dissolve the silicone mentioned above, and cyclohexanol, methanol, ethanol, ethylene glycol, glycerin, acetone, water, dimethyl phthalate, petrolactam, vegetable oil, and animal oil It is also a preferred form that at least one solvent selected from the above is mixed and used within a range that does not impair the affinity for silicone.

  Next, a procedure performed in the method for removing a silicone-based surface treatment agent from a part of the silicone-coated fiber of the present invention, which is performed using the above-described release agent, will be described. One of the features of the method of the present invention is that the above-described release agent is used. Further, the release agent is brought into contact with at least a part of the fiber from which the surface treatment agent is to be removed (a part to be peeled off necessary for adhesion), and the release agent is left standing or lightly vibrated in that state. It has the process of maintaining the state which contacted at least one part of the fiber, making a release agent adapt to a fiber, and washing | cleaning the said release agent after that. According to the study by the present inventors, a release agent comprising a solvent having an affinity for silicone in particular is used, and the release agent is held in contact with the release target portion as described above. The release agent penetrates into the inside of the coating layer, and this causes the silicone-based surface treatment agent applied to the part to be peeled to decompose from the inside. As a result, the silicone-based surface has been difficult until now. It is considered that the coating layer of the treatment agent can be removed in a spot shape.

  Furthermore, if necessary, in order to neutralize the remaining acid and remove the remaining silicone, a step of contacting a weakly alkaline solution and then washing again may be included. In this case, it is preferable to use a saturated aqueous solution of sodium hydrogen carbonate as the weakly alkaline solution. Sodium bicarbonate has been used as a silicone decomposing agent in the past, but as described above, with such a decomposing agent, the fibers to be peeled off that are necessary for adhesion are washed with silicone-coated fibers. The silicone-based surface treatment agent could not be sufficiently removed from the surface. On the other hand, in the method of removing the silicone-based surface treatment agent of the present invention, a specific release agent is used, and through the procedure of contact with the release agent, holding stationary or holding while vibrating, Since the contacting release agent penetrates into the inside of the coating layer and the coating layer is decomposed from the inside, the coating layer is sufficiently peeled from the fiber surface. Therefore, the silicone-based surface treatment agent constituting the coating layer is sufficiently removed from the fiber surface in the subsequent cleaning step. For this reason, even if the silicone-based surface treatment agent remains after these steps, the residue is one that has been decomposed or peeled off from the fiber surface. When a step of contacting with sodium bicarbonate for the purpose of neutralization and subsequent re-washing is provided, the remaining silicone surface treatment agent is easily decomposed by sodium bicarbonate during this step. For this reason, by providing the said process further, removal of the silicone type surface treating agent from the silicone application | coating fiber surface can be achieved more reliably enough.

  The cleaning in the above is preferably performed with running water in any case. In addition, as the time for maintaining the release agent in contact with at least a part of the silicone-coated fiber and allowing the release agent to conform to the fiber, for example, depending on the presence or absence of vibration, about 30 minutes to 2 hours, More preferably, it may be about 30 minutes to 1 hour. According to the method of the present invention, a general-purpose agent can be used as a release agent, and the treatment method is very simple, without extending the silicone-based surface treatment agent from the fiber to other parts, It can be removed in a spot-like state.

  A preferable procedure in the method for removing the silicone-based surface treatment agent from the fiber of the present invention is as follows, and the remarkable effect of the present invention described above can be obtained by such a procedure. In the following, a system using an acid-containing solvent as the release agent is shown as a representative example, but the present invention is not limited to this, and the various forms of release described above. Of course, an agent can be used.

First, as a release agent, a solution is prepared in which an acid having silicone resolving power is dissolved in a solvent having affinity for silicone.
-Then, the solution in which the acid is dissolved in the above solvent is brought into contact with the fiber portion from which the silicone is to be removed.
Further, in the contact state, the solution in which the acid is dissolved in the solvent described above is allowed to adapt to the fiber portion by standing or light vibration for a certain time.
As a result, the acid permeates from the surface of the silicone to the inside due to the affinity of the solvent, and decomposes the silicone over time.
-Next, after decomposition | disassembly of a silicone, the solution which dissolved the acid in the solvent with an appropriate solvent, water, etc. is wash | cleaned.
・ If necessary, contact the weak alkaline solution to neutralize the remaining acid.
-Thoroughly wash after neutralization to remove neutralized salts and weak alkalis.
-The fiber part of the silicone removal part obtained as mentioned above and the adherend are bonded using a required adhesive.
-By doing in this way, the silicone coating fiber by which the silicone type surface treating agent is apply | coated to the surface can be firmly adhere | attached only with an adhesive agent.

  Next, an Example and a comparative example are given and this invention is demonstrated concretely.

<Example 1>
(Removal treatment of silicone-based surface treatment agent)
First, (1) 30 g of dodecylbenzenesulfonic acid dissolved in 70 g of a mineral terpene (manufactured by Sanwa Chemical Industry Co., Ltd.) as a solvent was prepared. Next, (2) a polyester fiber coated with a silicone-based surface treatment agent was used as a test body, and a part thereof was immersed in the solution prepared above and held in that state for 1 hour. Then, the fiber taken out from the solution was washed with running water.
Further, (3) the washed fiber was immersed in a saturated aqueous solution of sodium bicarbonate for 1 hour. Then, the fiber was taken out from the saturated aqueous solution of sodium hydrogen carbonate and washed in running water.
Finally, (4) the washed fiber was dried and the moisture was evaporated from the fiber to remove the silicone-based surface treatment agent applied to the fiber surface.

(Evaluation test)
Evaluating that the removal treatment of the silicone-based surface treatment agent applied to the fiber surface was reliably performed by the steps (1) to (4) described above was equivalent to a polyether triol having a molecular weight of 2,000. The following procedures (5) to (7) were performed using an adhesive comprising the above isocyanate. Specifically, (5) the above-mentioned adhesive is applied to the portion of the polyester fiber that has been subjected to the surface treatment agent removal treatment performed earlier, and this fiber is immediately brought into close contact with the thermoplastic polyurethane film. Left for 24 hours. Thereafter, (6) the polyurethane film was attached to the chuck, and the non-bonded portion of the fiber was attached to the chuck at the other end. Then, (7) the chucks were pulled apart at a speed of 100 mm / min, and the peeled state of the polyester fibers adhered with an adhesive was observed from the film. As a result, the bonded fibers were cut without coming off from the polyurethane film. From the comparison between this and the reference example described below, in the case of this example, the above-described (1) to (4) It was confirmed that the removal treatment of the silicone-based surface treatment agent applied to the surface of the polyester fiber was reliably performed by the process.

<Reference Example 1>
For comparison, the same fibers as used in Example 1 were used without removing the silicone-based surface treatment agent applied to the surfaces of (1) to (4) in Example 1. The operations (5) to (7) performed in Example 1 were performed in the same manner. As a result, it was confirmed that the fibers bonded with the adhesive were removed from the film, and the strength of adhesion between the fibers and the film was insufficient.

<Example 2>
In this example, instead of (1) performed in Example 1, 20 g of paratoluenesulfonic acid was mixed with 80 g of toluene to prepare a mixed solution, which was then applied to the fiber surface with silicone. A release agent for removing the surface treatment agent of the system was used. The same operations as (2) to (4) performed in Example 1 were performed except that this mixed liquid was used as the release agent.

  When the same operation as (5) performed in Example 1 was performed, the following two-component adhesive was used. That is, in this example, an adhesive obtained as follows was used. 30 g of trimethylolpropane was dissolved in 35 g of methyl ethyl ketone and 35 g of dimethylformamide as solvents to obtain a trimethylolpropane solution. On the other hand, 30 g of a compound having a structure in which three molecules of hexamethylene diisocyanate were added to one molecule of trimethylolpropane was dissolved in 70 g of methyl ethyl ketone as a solvent to obtain a solution. Then, the trimethylolpropane solution obtained above and the solution of the hexamethylene diisocyanate adduct were mixed so that the hydroxyl group and the isocyanate group were equimolar to form a two-component adhesive. .

And the adhesive agent which consists of this liquid mixture is apply | coated to the fiber which processed the removal of the silicone type surface treating agent apply | coated to the surface by operation (1)-(4) performed above, and this is applied. It was made to adhere to a thermoplastic polyurethane film and heated at 80 to 100 ° C. for 1 hour.
Furthermore, using the fiber obtained through the above-described steps bonded to a thermoplastic polyurethane film, the same operation as in (6) and (7) of Example 1 was performed, and the fiber bonded with an adhesive was used. The peeled state from the film was observed. As a result, as in the case of Example 1, it was confirmed that the adhered fibers were cut without coming off from the polyurethane film.

<Example 3>
The same operation as in Example 1 was performed except that nylon fiber was used instead of the polyester fiber used in Example 1, and the silicone-based surface treatment agent applied to the surface of the nylon fiber was removed. The same operation as (5) to (7) in Example 1 was performed, and it was confirmed that the removal was performed in the same manner as in Example 1. As a result, as in the case of Example 1, the bonded nylon fiber was cut without coming off the polyurethane film, and from this, the silicone-based surface treatment agent applied to the surface of the nylon fiber could be removed. Was confirmed.

<Reference Example 2>
The same operation as in Reference Example 1 was carried out except that the same nylon fiber as used in Example 3 was used as it was without removing the silicone-based surface treatment agent applied to the surface of the nylon fiber. It was. As a result, it was confirmed that the nylon fiber comes off from the film, and the adhesive strength to the film of the portion bonded with the nylon fiber adhesive was insufficient.

The evaluation test results are summarized in Table 1.

Claims (9)

A method of removing a silicone-based surface treatment agent from a silicone-coated fiber, wherein the applied surface treatment agent is removed from a portion of the silicone-coated fiber having a silicone-based surface treatment agent applied to the surface, using a release agent. Because
Acid with a resolution of the silicone, and / or capable of dissolving silicone, mineral turpentine, naphtha, petroleum ether, toluene, benzene, xylene, cyclohexane, gasoline, kerosene, mineral spirits, methylene chloride, chloroform, carbon tetrachloride A release agent comprising a solvent having an affinity for silicone which is at least one selected from the group consisting of 2-ethylhexanol, diethyl ether, diisopropyl ether, methyl ethyl ketone, methyl isobutyl ketone and amyl acetate ,
The release agent is brought into contact with at least a part of the fiber from which the surface treatment agent is to be removed, and the state in which the release agent is brought into contact with at least a part of the fiber while being allowed to stand still or lightly vibrate is maintained. And then apply the release agent to the fiber,
Having a step of washing the release agent,
Further, if necessary, in order to neutralize the remaining acid and remove the remaining silicone, a silicone having a step of contacting with a weakly alkaline solution and then washing again is provided. A method of removing a surface treatment agent of a system.   The method for removing a silicone-based surface treatment agent according to claim 1, wherein the acid having a resolution with respect to silicone is alkylbenzenesulfonic acid.   The alkylbenzene sulfonic acid is at least one of dodecyl benzene sulfonic acid or paratoluene sulfonic acid, and the alkyl benzene sulfonic acid is a solvent that dissolves silicone, and is selected from the group consisting of mineral terpenes, naphtha, petroleum ether, and toluene. The method for removing a silicone-based surface treatment agent according to claim 2, wherein a release agent is used which is dissolved in at least one of the above solvents. The solvent having affinity for the silicone is selected from the group consisting of isopropanol, butanol, amyl alcohol, dioxane, glacial acetic acid, turpentine oil, machine oil, ethyl cellosolve, paraffin oil and fatty acid, which dissolves a part of the silicone. method of removing the surface treatment agent of silicone according to claim 1 or 3 which is a mixed solvent of at least one kind of solvent. The release agent, in addition to a solvent having affinity for the silicone, a solvent which does not dissolve the silicone, cyclohexanol, methanol, ethanol, ethylene glycol, glycerol, acetone, water, dimethyl phthalate, petrolatum, vegetable oils and The method for removing a silicone-based surface treatment agent according to claim 1, comprising at least one solvent selected from the group consisting of animal oils. The method for removing a silicone-based surface treatment agent according to any one of claims 1 to 5 , wherein the weakly alkaline solution is a saturated aqueous solution of sodium hydrogencarbonate. A release agent for use in the method for removing a silicone-based surface treatment agent from the silicone-coated fiber according to any one of claims 1 to 6 , wherein an acid having a resolution with respect to silicone is used as a mineral turpentine. , Naphtha, petroleum ether, toluene, benzene, xylene, cyclohexane, gasoline, kerosene, mineral spirit, methylene chloride, chloroform, carbon tetrachloride, 2-ethylhexanol, diethyl ether, diisopropyl ether, methyl ethyl ketone, methyl isobutyl ketone and amyl acetate A release agent, wherein the release agent is dissolved in a solvent having affinity for at least one silicone selected from the group consisting of: The acid having a resolution with respect to the silicone is an alkylbenzene sulfonic acid, and the solvent having an affinity for the silicone is at least one selected from the group consisting of mineral terpenes, naphtha, petroleum ether, and toluene. The release agent according to claim 7 , comprising: An acid having a resolution for the silicone, the ratio of the solvent having an affinity for the silicone, by weight, according to claim 7 or 8 content of the acid in the solution is 10% to 70% Release agent.