JP2014210827A - Method for producing oil rich solid soap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil rich solid soap containing a large amount of oil which has been thought to be impossible, and to provide a method for producing the same.SOLUTION: In a solid or pasty solid soap obtained by adding and blending additional raw materials to a soap base material containing an alkali salt of a higher fatty acid obtained by a reaction between a higher fatty acid and an alkali agent, an oil component which has not been subjected to the reaction is added and blended as one of the additional raw materials to obtain an oil rich solid soap.

Description

The present invention relates to an oil-rich solid soap and a method for producing the same. In the present invention, the solid soap excludes liquid liquid soap, and means soap having detergency including paste soap as well as solid soap.

In general, soap is an alkali salt of a higher fatty acid, and is produced, for example, by saponifying an oil and fat component with an alkali agent such as sodium hydroxide (Patent Document 1). The manufacturing method includes fat saponification method in which raw material fat is saponified with sodium hydroxide or the like, and fatty acid neutralization in which fatty acid obtained by high-temperature hydrolysis of raw material fat is separated from glycerin and neutralized alone. There are known a method and an ester saponification method in which saponification is carried out after pretreatment for converting raw material fats and oils into fatty acid esters.

In the solid soap, since the fat and oil component is saponified or neutralized and molded into a solid mold, the content of the fat and oil component is limited. Specifically, at the stage when the soap base of the solid soap is obtained, it is difficult to contain about 10% by mass or more in the soap of the mechanical kneading and the frame kneading, and 20% by mass or more in the soap of the cold process manufacturing method, Even if it tries to contain more than that, it will not solidify and cannot be commercialized.

More specifically, a cold process manufacturing method, which is a kind of fat saponification method, will be described as an example. In this manufacturing method, generally, fat components such as vegetable matter are introduced into a reaction kettle and dissolved, and sodium hydroxide or An alkali agent such as potassium hydroxide is added to cause a saponification reaction while stirring. Next, the mixture is transferred to a water-cooled frame, stirred as necessary, stopped at the stage approaching a paste, and allowed to react and mature for about 1 to 2 weeks while maintaining around 30 ° C. A soap base mainly composed of an alkali salt of a higher fatty acid obtained after the completion of the reaction is taken out of the water-cooled frame and aged and dried to obtain a soap base. The obtained soap base is cut, molded with a mold material, dried, and shipped as soap as a product. At the time of charging into the above reaction kettle, the blending ratio of the vegetable oil component and the alkaline agent is about 10 to 20 parts by mass of the alkaline agent with respect to 100 parts by mass of the vegetable oil component, but more than this If it increases, it will not substantially solidify.

On the other hand, as shown in Patent Documents 1 to 3, various soaps have been proposed which are molded by adding various additives to a soap base mainly composed of an alkali salt of a higher fatty acid. Additives were a fragrance | flavor, a coloring agent, and a medicinal component, and did not adjust the quantity of an oil-fat component.

JP 2006-290865 A JP 2003-119499 A Japanese Patent Publication No. 63-20880

An object of the present invention is to provide an oil-rich solid soap containing a large amount of oil and fat components, which has been conventionally considered impossible to produce in a solid soap, and to provide a method for producing the same.

The present invention relates to a soap base mainly composed of an alkali salt of a higher fatty acid obtained by the reaction of a higher fatty acid and an alkaline agent, and a solid soap obtained by adding and kneading an additional raw material, and at least the additional raw material Provided is an oil-rich solid soap in which one kind is an additional fat component that has not been reacted, and the additional fat component swells the main component to form a solid or a paste To do.

The additional fat component is blended in an amount of 10% by mass or more, more desirably 20% by mass or more. Thereby, sufficient oil can be given to the skin by the additional oil and fat component, and a smooth touch can be obtained even after washing.

In the solid soap of the present invention, the water content in the soap base is desirably 90% or less of the reference water content (that is, the water content in the soap base in a normal soap). Thereby, content of an additional fat component can be raised. More desirably, the reference moisture content varies depending on the manufacturing method of the soap base and the type of ingredients. In the case of cold process soap, the reference moisture content is 8 to 23% by mass, whereas the oil rich of the present invention is rich. In such a solid soap, the water content in the soap base is preferably about 3 to 20% by mass, and it is appropriate that the maximum width is reduced by about 13 to 87%. In the case of mechanically kneaded soap, the above-mentioned reference moisture content is 8 to 13% by mass, whereas in the oil-rich solid soap of the present invention, the moisture content in the soap base is preferably about 3 to 10% by mass. A substantial reduction of about 23-76% is appropriate. In the framed soap, the standard moisture content of the whole soap is 18 to 27% by mass, whereas in the oil-rich solid soap of the present invention, the moisture content in the soap base is preferably about 5 to 20% by mass, It is appropriate that the maximum width is reduced by about 18 to 74%. However, when the amount of the additional oil and fat component is small, the water content can be reduced without making it less than the reference water content.

Thus, in the oil-rich solid soap of the present invention, the soap base 30 to 80% by mass and the additional fat and oil component 20 to 70% by mass are blended, and the amount of water in the soap base is 3 to 3. It is desirable to be 20% by mass.

The method for producing a solid soap according to the present invention includes a moisture adjustment step of adjusting moisture on a soap base mainly composed of an alkali salt of a higher fatty acid obtained by a reaction between a higher fatty acid and an alkaline agent, and the moisture adjustment is performed. A kneading step in which an oil and fat component is added and kneaded to the soap base, and the moisture adjustment step is a step of drying the soap base until it becomes less than a reference moisture content of the soap, and is added in the kneading step. The above-mentioned main component is swollen by the added oil and fat component so as to obtain an oil-rich solid soap that is solid or pasty.
It is desirable to include a subdividing step for subdividing the soap base before or after the moisture adjustment step in order to obtain a work efficiency and a homogeneous oil-rich solid soap.

The present invention has been able to provide an oil-rich solid soap containing a large amount of oil and fat components that have been thought to be impossible to produce in the past. In addition, the present invention has been able to provide a method for producing an oil-rich solid soap.

Oil-rich solid soap can give sufficient oil to the skin, and a smooth feel can be obtained even after washing. In countries with good hygiene today, soap is often used to wash the face, hands, and body, and it is said that the essential oil tends to be removed too much by washing. By using an oil-rich solid soap, sufficient oil can be imparted to the skin surface.

Embodiments of the present invention will be described below.

(Summary) The oil-rich solid soap of the present invention includes a soap base mainly composed of an alkali salt of a higher fatty acid obtained by the reaction of a higher fatty acid and an alkali agent, and a saponification reaction added as an additional component to the soap base. And an oil and fat component which is not made.

(Higher Fatty Acid of Soap Base) As the higher fatty acid, any fatty acid that can be usually used in soap compositions can be used without particular limitation. Specifically, higher fatty acids having 8 to 24 carbon atoms can be used, and more specifically, single fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, and behenic acid are used. A mixture of these fatty acids can be used. Higher fatty acids can be formulated as animal and vegetable oils and fats (for example, palm oil, beef tallow, palm oil, palm kernel oil, castor oil, coconut oil, hydrogenated coconut oil, coconut oil, wheat germ oil, olive oil) , Triglycerides such as isostearic acid triglyceride and isooctanoic acid triglyceride.

The blending amount of the higher fatty acid is 0.5 to 10.0% by mass in the soap base, preferably 2.0 to 7.0% by mass, more preferably 3.0 to 6.0% by mass. is there. When the blending amount is less than 0.5% by mass, foaming of the solid soap is not good. On the other hand, when it exceeds 10.0% by mass, the soap becomes soft and difficult to mold, and there is a problem in productivity.

(Alkali Agent) The higher fatty acid is subjected to a saponification reaction or neutralization reaction with an alkali agent such as sodium hydroxide or potassium hydroxide to obtain a soap base mainly composed of an alkali salt of a higher fatty acid. The blending amount of the higher fatty acid and the alkali agent may be determined according to a conventional method, but as an example, 10 to 20 parts by mass of sodium hydroxide and 15 to 30 parts by mass of potassium hydroxide per 100 parts by mass of the higher fatty acid. Is appropriate.

(Optional component) The soap base may contain optional components that are usually used in solid soap. Examples of such optional components include hydrocarbons such as squalane, liquid paraffin, light liquid isoparaffin, heavy liquid isoparaffin, microcrystalline wax, and solid paraffin, dimethicone, femethicone, cyclomethicone, amodimethicone, polyether-modified silicone, and the like. Silicones, jojoba oil, carnauba wax, molasses, beeswax, geiwa, octyldodecyl oleate, isopropyl myristate, neopentyl glycol diisostearate, diisostearate malate, behenyl alcohol, cetanol, oleyl alcohol Higher alcohols such as octadecyl alcohol, sucrose, sorbitol, maltitol, 1,3-butanediol, glycerin, diglycerin, dipropiate Polyhydric alcohols such as polyglycol, polyethylene glycol, 1,2-pentanediol, 1,2-hexylene glycol, isoprene glycol, sorbitan sesquioleate, sorbitan monooleate, sorbitan trioleate, sorbitan sesquistearate, sorbitan monostearate , Polyoxyethylene sorbitan monooleate, polyoxyethylene sorbitan monostearate, polyoxyethylene stearate, polyoxyethylene oleate, polyoxyethylene glyceryl fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene hydrogenated castor oil, etc. Anionic surfactants such as surfactants, sodium lauryl stearate, polyoxyethylene alkyl sulfates, sulfosuccinate esters, Cationic surfactants such as quaternary alkyl ammonium salts, amphoteric surfactants such as alkylbetaines, organic powders such as crystalline cellulose, cross-linked methylpolysiloxane, polyethylene powder, acrylic resin powder, talc, mica, seric Site, Magnesium carbonate, Calcium carbonate, Titanium dioxide, Iron oxide, Bitumen, Ultramarine, Titanium mica, Titanium sericite, Silica and other powders that may be surface treated, Acrylic acid / alkyl methacrylate copolymer and / or its Salts, carboxyvinyl polymers and / or salts thereof, thickeners such as xanthan gum and hydroxypropyl cellulose, vitamins and glycyrrhizinate such as retinol, retinoic acid, tocopherol, riboflavin, pyridoxine, ascorbic acid, ascorbic acid phosphate ester salt, G Active ingredients such as terpenes such as lithylretin, ursolic acid and oleanolic acid, steroids such as estradiol, ethinylestradiol and estriol, preservatives such as phenoxyethanol, parabens, hibitengluconate and benzalkonium chloride, dimethylaminobenzoic acid Preferred examples include ultraviolet absorbers such as esters, cinnamic esters and benzophenones, and chelating agents such as edetates and ethanediphosphonates. It can also be made transparent by adding a polyhydric alcohol soap such as sucrose, sorbitol, or glycerin.

The blending amount of the optional component can be variously changed depending on the type and purpose of addition, but can be appropriately determined within a range that does not significantly impair the soap's detergency, foaming property, hardness and the like.

(Process for producing soap base) A soap base containing an alkali salt of a higher fatty acid is produced from the above raw materials. The production method involves aging by reacting the above fat and oil components with an alkali agent, and can be obtained by a general soap production method such as a fat saponification method, a fatty acid neutralization method, an ester saponification method, or the like. For example, the animal oils and fats represented by the above-mentioned beef tallow and sheep fats, or vegetable oils and fats represented by coconut oil, palm oil, palm kernel oil, soybean oil, olive oil, cottonseed oil, etc. Fatty acid esters obtained by the treatment are saponified with an alkali agent such as sodium hydroxide or potassium hydroxide, or fatty acids obtained by decomposing these fats or oils are used alone or as a mixture of sodium hydroxide and potassium hydroxide. A soap base is produced by completely neutralizing with an alkali agent such as alkanolamine. Alternatively, a soap base containing higher fatty acids may be produced without complete neutralization.
Moreover, this soap base can also be purchased and used as a soap base distributed as a semi-finished product.

(Moisture adjustment step) The amount of water is adjusted for the soap base. This moisture adjustment may be the same method as moisture adjustment (hereinafter, referred to as general moisture adjustment) performed in a general soap substrate manufacturing process, and may be natural drying or drying with a dryer. Further, the general moisture adjustment step and the moisture adjustment step of the present invention may be performed separately, but can also be performed without distinction.

When it is desired to add a large amount of the additional oil / fat component, it is preferable to reduce the water content more than the general water content adjustment, but it is not impossible to carry out only the general water content adjustment.

Appropriate amounts of water are shown in Table 1. The amount of water varies depending on the method for producing the soap base. In the following description, what is simply expressed as% means mass% in principle.

なお、上記の（ｂ）／（ａ）は、（ａ）と（ｂ）との各最大値同士又は最小値同士の比率を１００分率で示したものである。

In addition, said (b) / (a) shows the ratio of each maximum value of (a) and (b), or the minimum value in 100 fractions.

(Kneading step) Next, an oil-rich solid soap of the present invention can be produced by adding, mixing and kneading additional fat and oil components to the soap base. For kneading, a kneader may be used, kneading may be carried out by hand, and it may be performed according to a conventional method. Moreover, you may add all or one part of the said arbitrary components at this stage.

(Subdividing step) In kneading, it is desirable to subdivide the aforementioned soap base and add an additional fat and oil component to facilitate uniform mixing. This subdivision process can be performed before or after the moisture adjustment process. It is desirable that the degree of subdivision is performed to the extent that it becomes powdery or finely granular.

(Higher fatty acid of additional oil and fat component) In the present invention, it is the greatest feature that an additional oil and fat component is added to the soap base. As the additional oil and fat component, at least one of higher fatty acids listed in the above-described production of the soap base can be used. In addition, the higher fatty acid at the time of manufacture of the soap base and the higher fatty acid as an additional component may be of the same type or different types.

(Blending amount) The adding amount of the fat component of the additional component is desirably 20 to 70% by mass in the whole oil-rich solid soap obtained. When it is less than 20% by mass, the finely divided soap is not well-organized, and it is difficult to obtain a significant difference from general solid soap. When the amount is more than 70% by mass, the oil component is too much and the influence on the detergency becomes too large, and the fluidity of the final oil-rich solid soap obtained may be too low.

The oil and fat component used in the manufacture of the soap base is converted to an alkali salt of a higher fatty acid by reaction with an alkaline agent, but the higher fatty acid of the additional oil and fat component remains unreacted and the final oil-rich solid soap The point present therein is a feature of the oil-rich solid soap of the present invention. This additional oil / fat component exerts an action of swelling the main component of the soap base, and is useful for finishing the obtained oil-rich solid soap into a moist and smooth solid or paste.

(Unreacted alkali material) When a part of the alkali agent remains unreacted, it may react with an additional fat component. Alternatively, a soap base containing unreacted higher fatty acid may be produced without completely reacting. Also in these cases, the total amount of the unreacted additional oil and fat components may be within the range described in the above (blending amount).

(Oil-rich solid soap) In the resulting solid soap, the above-mentioned additional fat components are present in an unreacted state compared to ordinary solid soap, softer and more moist than ordinary soap. Give the user a skin feel. The shape of the product is free, and in the case of a solid form, it can be molded into various shapes by a conventional method, but as an example, it is molded into a column shape substantially the same as a lipstick and stored in a lipstick container. It can also be used to clean the skin. In the case of a paste, it is desirable that the paste is fluid enough to be fingered and can be supplied in a cylindrical or tube container.

Examples of the present invention will be described below, but the present invention should not be understood to be limited to these examples.
(Examples 1 to 5) A soap base was produced from the raw materials shown in Base 2 of Table 2 by a cold production method, and aged and dried according to a conventional method. Drying was performed by natural drying, and it was dried longer than normal drying as a moisture adjustment step, to obtain a soap base with an adjusted moisture content in the soap base of 14% by mass.

The obtained soap base was finely crushed until it became powdery, and the additional fat and oil components shown in Table 3 were added, and kneaded by mechanical kneading and hand kneading until uniform to obtain an oil-rich solid soap. The properties of the resulting soap differ depending on the blending ratio of fats and oils and the amount of water, and the state is shown in “State at normal temperature” in Table 3. The solid one was stable as a small lump, the gel one was a paste with no fluidity, and the cream one was stable with a fluid pasty.
In Table 3, “Fat and fat mixing ratio (%)” and “Moisture content (%)” indicate the mass% of the additional oil and fat component and the water content in the entire finished oil-rich solid soap. . The “water content (%) with respect to the substrate” indicates the mass% of adjusted moisture in the soap substrate.

(Examples 6 to 23) Commercially available machine-kneaded soap shown in the base 2 of Table 2 (Non-Sal TN-1 and Non-Sal LN-1 manufactured by NOF Corporation were used at a blending mass ratio of 8: 2) was subdivided. Then, it was naturally dried as a moisture adjustment step to obtain a soap substrate having an adjusted moisture content of 4% by mass in the soap substrate.

To the obtained soap base, the additional fat and oil components shown in Table 3 were added and kneaded by mechanical and hand kneading until uniform, to obtain an oil-rich solid soap. The properties of the resulting soap differ depending on the blending ratio of fats and oils and the amount of water, and the state is shown in “State at normal temperature” in Table 3. When the amount of fats and oils is small, it cannot be put together into a lump and is “powdered”. As the amount of fats and oils increases, it becomes a “gathered” state, and when further increased, it becomes “solid” and “creamy”. When the amount was too large, it became “liquid”. Therefore, it is appropriate to carry out the treatment in the range of “consistent” to “creamy”.

(Examples 24 to 26) A soap base was produced from the raw materials shown in the base 3 of Table 2 by a frame kneading method, and aged and dried according to a conventional method. Drying was performed by natural drying, and was dried for longer than normal drying as a moisture adjustment step, thereby obtaining a soap base having a water content after adjustment in the soap base of 15% by mass.

The obtained soap base is finely crushed until it becomes powdery, and the amount of olive oil added as an additional fat and oil component in Table 3 is increased, and kneaded with mechanical and hand kneading until uniform to obtain an oil-rich solid soap It was. The obtained soap was in a “gathered” state when the blended amount of fats and oils was 50 mass%.

（試験）得られた実施例の石鹸について、「まとまる」〜「クリーム状」のものについて、下記の試験を行いその結果を表３に示す。
（泡立ち）常温の水道水にて、手で泡立てた際の泡立ち感を確認し３段階で評価した。評価は次の通りである。
「×」…極端に泡立ちが悪く、市販が困難。
「○」…通常の泡立ちで、市販が可能。
「◎」…泡立ちがとても良い。

(Test) With respect to the soaps of the obtained examples, the following tests were conducted for "Marumaru" to "Cream", and the results are shown in Table 3.
(Bubbling) The feeling of bubbling when hand bubbling was confirmed with room-temperature tap water and evaluated in three stages. The evaluation is as follows.
“×”: Extremely poor foaming and difficult to market.
“○”: Normal foaming and can be marketed.
“◎”… Bubbling is very good.

(Skin feel) Ten panelists confirmed the skin feel when using freshly foamed hands with tap water at room temperature, and each person evaluated in three stages, and the total was displayed. The evaluation is as follows.
“1”: Same as ordinary commercially available framed soap.
“2”… It feels moist and soft.
“3”… It feels greasy.

As described above, in the examples of the present invention, it was confirmed that foaming had no particular problem and that any soap with a moist and soft feel could be obtained. The state of the obtained soap varies depending on the manufacturing method and ingredients of the soap base, and also varies depending on the type of the fat and oil component. In any case, if the amount of the fat and oil is small, the property is powdery. It cannot be put together into a lump, it becomes solid as the blending amount increases, and when it is further increased, it becomes a paste, but if it is increased too much, it becomes liquid, and it is confirmed that the additional oil component may not be fully blended. It was.

The present invention relates to an oil-rich solid soap and a method for producing the same. In the present invention, the solid soap excludes liquid liquid soap, and means soap having detergency including paste soap as well as solid soap.

In general, soap is an alkali salt of a higher fatty acid, and is produced, for example, by saponifying an oil and fat component with an alkali agent such as sodium hydroxide (Patent Document 1). The manufacturing method includes fat saponification method in which raw material fat is saponified with sodium hydroxide or the like, and fatty acid neutralization in which fatty acid obtained by high-temperature hydrolysis of raw material fat is separated from glycerin and neutralized alone. There are known a method and an ester saponification method in which saponification is carried out after pretreatment for converting raw material fats and oils into fatty acid esters.

In the solid soap, since the fat and oil component is saponified or neutralized and molded into a solid mold, the content of the fat and oil component is limited. Specifically, at the stage when the soap base of the solid soap is obtained, it is difficult to contain about 10% by mass or more in the soap of the mechanical kneading and the frame kneading, and 20% by mass or more in the soap of the cold process manufacturing method, Even if it tries to contain more than that, it will not solidify and cannot be commercialized.

More specifically, a cold process manufacturing method, which is a kind of fat saponification method, will be described as an example. In this manufacturing method, generally, fat components such as vegetable matter are introduced into a reaction kettle and dissolved, and sodium hydroxide or An alkali agent such as potassium hydroxide is added to cause a saponification reaction while stirring. Next, the mixture is transferred to a water-cooled frame, stirred as necessary, stopped at the stage approaching a paste, and allowed to react and mature for about 1 to 2 weeks while maintaining around 30 ° C. A soap base mainly composed of an alkali salt of a higher fatty acid obtained after the completion of the reaction is taken out of the water-cooled frame and aged and dried to obtain a soap base. The obtained soap base is cut, molded with a mold material, dried, and shipped as soap as a product. At the time of charging into the above reaction kettle, the blending ratio of the vegetable oil component and the alkaline agent is about 10 to 20 parts by mass of the alkaline agent with respect to 100 parts by mass of the vegetable oil component, but more than this If it increases, it will not substantially solidify.

On the other hand, as shown in Patent Documents 1 to 3, various soaps have been proposed which are molded by adding various additives to a soap base mainly composed of an alkali salt of a higher fatty acid. Additives were a fragrance | flavor, a coloring agent, and a medicinal component, and did not adjust the quantity of an oil-fat component.

JP 2006-290865 A JP 2003-119499 A Japanese Patent Publication No. 63-20880

An object of the present invention is to provide an oil-rich solid soap containing a large amount of oil and fat components, which has been conventionally considered impossible to produce in a solid soap, and to provide a method for producing the same.

The present invention provides at least one additional raw material in a solid soap obtained by adding an additional raw material and kneading the soap base mainly composed of an alkali salt of a fatty acid obtained by a reaction between a fatty acid and an alkaline agent. Is an additional oil / fat component that has not undergone the reaction, and the additional oil / fat component swells the main component to form a solid or a paste, thereby providing an oil-rich solid soap.

The additional fat component is blended in an amount of 10% by mass or more, more desirably 20% by mass or more. Thereby, sufficient oil can be given to the skin by the additional oil and fat component, and a smooth touch can be obtained even after washing.

In the solid soap of the present invention, the water content in the soap base is desirably 90% or less of the reference water content (that is, the water content in the soap base in a normal soap). Thereby, content of an additional fat component can be raised. More desirably, the reference moisture content varies depending on the manufacturing method of the soap base and the type of ingredients. In the case of cold process soap, the reference moisture content is 8 to 23% by mass, whereas the oil rich of the present invention is rich. In such a solid soap, the water content in the soap base is preferably about 3 to 20% by mass, and it is appropriate that the maximum width is reduced by about 13 to 87%. In the case of mechanically kneaded soap, the above-mentioned reference moisture content is 8 to 13% by mass, whereas in the oil-rich solid soap of the present invention, the moisture content in the soap base is preferably about 3 to 10% by mass. A substantial reduction of about 23-76% is appropriate. In the framed soap, the standard moisture content of the whole soap is 18 to 27% by mass, whereas in the oil-rich solid soap of the present invention, the moisture content in the soap base is preferably about 5 to 20% by mass, It is appropriate that the maximum width is reduced by about 18 to 74%. However, when the amount of the additional oil and fat component is small, the water content can be reduced without making it less than the reference water content.

Thus, in the oil-rich solid soap of the present invention, the soap base 30 to 80% by mass and the additional fat and oil component 20 to 70% by mass are blended, and the amount of water in the soap base is 3 to 3. It is desirable to be 20% by mass.

The method for producing a solid soap according to the present invention includes a moisture adjustment step of adjusting moisture on a soap base mainly composed of an alkali salt of a fatty acid obtained by a reaction between a fatty acid and an alkaline agent, and the moisture adjusted A kneading step in which an oil and fat component is added to the soap base and kneaded, and the moisture adjustment step is a step of drying the soap base until it becomes less than the reference moisture content of the soap, and was added in the kneading step. The main component is swollen by the additional oil and fat component to obtain an oil-rich solid soap that is solid or pasty.
It is desirable to include a subdividing step for subdividing the soap base before or after the moisture adjustment step in order to obtain a work efficiency and a homogeneous oil-rich solid soap.

The present invention has been able to provide a method for producing an oil-rich solid soap containing a large amount of oil and fat components, which has been considered impossible to produce in the past.

Oil-rich solid soap can give sufficient oil to the skin, and a smooth feel can be obtained even after washing. In countries with good hygiene today, soap is often used to wash the face, hands, and body, and it is said that the essential oil tends to be removed too much by washing. By using an oil-rich solid soap, sufficient oil can be imparted to the skin surface.

Embodiments of the present invention will be described below.

(Summary) The oil-rich solid soap of the present invention is subjected to a soap base mainly composed of an alkali salt of a fatty acid obtained by a reaction between a fatty acid and an alkali agent, and a saponification reaction added as an additional component to the soap base. Not containing oil and fat components.

( Fatty acid of soap base) Any fatty acid can be used without particular limitation as long as it can be usually used in a soap composition. Specifically, higher fatty acids having 8 to 24 carbon atoms can be used, and more specifically, single fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, and behenic acid are used. A mixture of these fatty acids can be used. Higher fatty acids can be formulated as animal and vegetable oils and fats (for example, palm oil, beef tallow, palm oil, palm kernel oil, castor oil, coconut oil, hydrogenated coconut oil, coconut oil, wheat germ oil, olive oil) , Triglycerides such as isostearic acid triglyceride and isooctanoic acid triglyceride.

The blending amount of the higher fatty acid is 0.5 to 10.0% by mass in the soap base, preferably 2.0 to 7.0% by mass, more preferably 3.0 to 6.0% by mass. is there. When the blending amount is less than 0.5% by mass, foaming of the solid soap is not good. On the other hand, when it exceeds 10.0% by mass, the soap becomes soft and difficult to mold, and there is a problem in productivity.

(Alkali Agent) The higher fatty acid is subjected to a saponification reaction or neutralization reaction with an alkali agent such as sodium hydroxide or potassium hydroxide to obtain a soap base mainly composed of an alkali salt of a higher fatty acid. The blending amount of the higher fatty acid and the alkali agent may be determined according to a conventional method, but as an example, 10 to 20 parts by mass of sodium hydroxide and 15 to 30 parts by mass of potassium hydroxide per 100 parts by mass of the higher fatty acid. Is appropriate.

(Optional component) The soap base may contain optional components that are usually used in solid soap. Examples of such optional components include hydrocarbons such as squalane, liquid paraffin, light liquid isoparaffin, heavy liquid isoparaffin, microcrystalline wax, and solid paraffin, dimethicone, femethicone, cyclomethicone, amodimethicone, polyether-modified silicone, and the like. Silicones, jojoba oil, carnauba wax, molasses, beeswax, geiwa, octyldodecyl oleate, isopropyl myristate, neopentyl glycol diisostearate, diisostearate malate, behenyl alcohol, cetanol, oleyl alcohol Higher alcohols such as octadecyl alcohol, sucrose, sorbitol, maltitol, 1,3-butanediol, glycerin, diglycerin, dipropiate Polyhydric alcohols such as polyglycol, polyethylene glycol, 1,2-pentanediol, 1,2-hexylene glycol, isoprene glycol, sorbitan sesquioleate, sorbitan monooleate, sorbitan trioleate, sorbitan sesquistearate, sorbitan monostearate , Polyoxyethylene sorbitan monooleate, polyoxyethylene sorbitan monostearate, polyoxyethylene stearate, polyoxyethylene oleate, polyoxyethylene glyceryl fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene hydrogenated castor oil, etc. Anionic surfactants such as surfactants, sodium lauryl stearate, polyoxyethylene alkyl sulfates, sulfosuccinate esters, Cationic surfactants such as quaternary alkyl ammonium salts, amphoteric surfactants such as alkylbetaines, organic powders such as crystalline cellulose, cross-linked methylpolysiloxane, polyethylene powder, acrylic resin powder, talc, mica, seric Site, Magnesium carbonate, Calcium carbonate, Titanium dioxide, Iron oxide, Bitumen, Ultramarine, Titanium mica, Titanium sericite, Silica and other powders that may be surface treated, Acrylic acid / alkyl methacrylate copolymer and / or its Salts, carboxyvinyl polymers and / or salts thereof, thickeners such as xanthan gum and hydroxypropyl cellulose, vitamins and glycyrrhizinate such as retinol, retinoic acid, tocopherol, riboflavin, pyridoxine, ascorbic acid, ascorbic acid phosphate ester salt, G Active ingredients such as terpenes such as lithylretin, ursolic acid and oleanolic acid, steroids such as estradiol, ethinylestradiol and estriol, preservatives such as phenoxyethanol, parabens, hibitengluconate and benzalkonium chloride, dimethylaminobenzoic acid Preferred examples include ultraviolet absorbers such as esters, cinnamic esters and benzophenones, and chelating agents such as edetates and ethanediphosphonates. It can also be made transparent by adding a polyhydric alcohol soap such as sucrose, sorbitol, or glycerin.

The blending amount of the optional component can be variously changed depending on the type and purpose of addition, but can be appropriately determined within a range that does not significantly impair the soap's detergency, foaming property, hardness and the like.

(Process for producing soap base) A soap base containing an alkali salt of a higher fatty acid is produced from the above raw materials. The production method involves aging by reacting the above fat and oil components with an alkali agent, and can be obtained by a general soap production method such as a fat saponification method, a fatty acid neutralization method, an ester saponification method, or the like. For example, animal oils and fats typified by the above-mentioned beef tallow and sheep fats or vegetable oils and fats typified by coconut oil, palm oil, palm kernel oil, soybean oil, olive oil, cottonseed oil, etc. Fatty acid esters obtained by the treatment are saponified with an alkali agent such as sodium hydroxide or potassium hydroxide, or fatty acids obtained by decomposing these fats or oils are used alone or as a mixture of sodium hydroxide and potassium hydroxide. A soap base is produced by completely neutralizing with an alkali agent such as alkanolamine. Alternatively, a soap base containing higher fatty acids may be produced without complete neutralization.
Moreover, this soap base can also be purchased and used as a soap base distributed as a semi-finished product.

(Moisture adjustment step) The amount of water is adjusted for the soap base. This moisture adjustment may be the same method as moisture adjustment (hereinafter, referred to as general moisture adjustment) performed in a general soap substrate manufacturing process, and may be natural drying or drying with a dryer. Further, the general moisture adjustment step and the moisture adjustment step of the present invention may be performed separately, but can also be performed without distinction.

When it is desired to add a large amount of the additional oil / fat component, it is preferable to reduce the water content more than the general water content adjustment, but it is not impossible to carry out only the general water content adjustment.

Appropriate amounts of water are shown in Table 1. The amount of water varies depending on the method for producing the soap base. In the following description, what is simply expressed as% means mass% in principle.

なお、上記の（ｂ）／（ａ）は、（ａ）と（ｂ）との各最大値同士又は最小値同士の比率を１００分率で示したものである。

In addition, said (b) / (a) shows the ratio of each maximum value of (a) and (b), or the minimum value in 100 fractions.

(Kneading step) Next, an oil-rich solid soap of the present invention can be produced by adding, mixing and kneading additional fat and oil components to the soap base. For kneading, a kneader may be used, kneading may be carried out by hand, and it may be performed according to a conventional method. Moreover, you may add all or one part of the said arbitrary components at this stage.

(Subdividing step) In kneading, it is desirable to subdivide the aforementioned soap base and add an additional fat and oil component to facilitate uniform mixing. This subdivision process can be performed before or after the moisture adjustment process. It is desirable that the degree of subdivision is performed to the extent that it becomes powdery or finely granular.

(Higher fatty acid of additional oil and fat component) In the present invention, it is the greatest feature that an additional oil and fat component is added to the soap base. As the additional oil and fat component, at least one of higher fatty acids listed in the above-described production of the soap base can be used. In addition, the higher fatty acid at the time of manufacture of the soap base and the higher fatty acid as an additional component may be of the same type or different types.

(Blending amount) The adding amount of the fat component of the additional component is desirably 20 to 70% by mass in the whole oil-rich solid soap obtained. When it is less than 20% by mass, the finely divided soap is not well-organized, and it is difficult to obtain a significant difference from general solid soap. When the amount is more than 70% by mass, the oil component is too much and the influence on the detergency becomes too large, and the fluidity of the final oil-rich solid soap obtained may be too low.

The oil and fat component used in the manufacture of the soap base is converted to an alkali salt of a higher fatty acid by reaction with an alkaline agent, but the higher fatty acid of the additional oil and fat component remains unreacted and the final oil-rich solid soap The point present therein is a feature of the oil-rich solid soap of the present invention. This additional oil / fat component exerts an action of swelling the main component of the soap base, and is useful for finishing the obtained oil-rich solid soap into a moist and smooth solid or paste.

(Unreacted alkali material) When a part of the alkali agent remains unreacted, it may react with an additional fat component. Alternatively, a soap base containing unreacted higher fatty acid may be produced without completely reacting. Also in these cases, the total amount of the unreacted additional oil and fat components may be within the range described in the above (blending amount).

(Oil-rich solid soap) In the resulting solid soap, the above-mentioned additional fat components are present in an unreacted state compared to ordinary solid soap, softer and more moist than ordinary soap. Give the user a skin feel. The shape of the product is free, and in the case of a solid form, it can be molded into various shapes by a conventional method, but as an example, it is molded into a column shape substantially the same as a lipstick and stored in a lipstick container. It can also be used to clean the skin. In the case of a paste, it is desirable that the paste is fluid enough to be fingered and can be supplied in a cylindrical or tube container.

Hereinafter, although the sample of the Example and comparative example of this invention is shown, this invention should not be limited to these samples and should be understood. Among the following samples, those corresponding to the examples of the present invention are Samples 1 to 10, 17 to 22, 25 and 26.
( Samples 1 to 5) A soap base was produced from the raw materials shown in Base 2 of Table 2 by a cold manufacturing method, and aged and dried according to a conventional method. Drying was performed by natural drying, and it was dried longer than normal drying as a moisture adjustment step, to obtain a soap base with an adjusted moisture content in the soap base of 14% by mass.

The obtained soap base was finely crushed until it became powdery, and the additional fat and oil components shown in Table 3 were added, and kneaded by mechanical kneading and hand kneading until uniform to obtain an oil-rich solid soap. The properties of the resulting soap differ depending on the blending ratio of fats and oils and the amount of water, and the state is shown in “State at normal temperature” in Table 3. The solid one was stable as a small lump, the gel one was a paste with no fluidity, and the cream one was stable with a fluid pasty.
In Table 3, “Fat and fat mixing ratio (%)” and “Moisture content (%)” indicate the mass% of the additional oil and fat component and the water content in the entire finished oil-rich solid soap. . The “water content (%) with respect to the substrate” indicates the mass% of adjusted moisture in the soap substrate.

( Samples 6 to 23) Commercially available mechanical soap (shown in Table 2 using Non-Sal TN-1 and Non-Sal LN-1 manufactured by NOF Corporation at a blending mass ratio of 8: 2) shown in Table 2 was subdivided. Then, it was naturally dried as a moisture adjustment step to obtain a soap substrate in which the adjusted moisture content in the soap substrate was 4% by mass.

To the obtained soap base, the additional fat and oil components shown in Table 3 were added and kneaded by mechanical and hand kneading until uniform, to obtain an oil-rich solid soap. The properties of the resulting soap differ depending on the blending ratio of fats and oils and the amount of water, and the state is shown in “State at normal temperature” in Table 3. When the amount of fats and oils is small, it cannot be put together into a lump and is “powdered”. As the amount of fats and oils increases, it becomes a “gathered” state, and when further increased, it becomes “solid” and “creamy”. When the amount was too large, it became “liquid”. Therefore, it is appropriate to carry out the treatment in the range of “consistent” to “creamy”.

( Samples 24 to 26) A soap base was produced from the raw materials shown in the base 3 of Table 2 by a frame kneading method, and aged and dried according to a conventional method. Drying was performed by natural drying, and was dried for longer than normal drying as a moisture adjustment step, thereby obtaining a soap base having a water content after adjustment in the soap base of 15% by mass.

The obtained soap base is finely crushed until it becomes powdery, and the amount of olive oil added as an additional fat and oil component in Table 3 is increased, and kneaded with mechanical and hand kneading until uniform to obtain an oil-rich solid soap It was. The obtained soap was in a “gathered” state when the blended amount of fats and oils was 50 mass%.

（試験）得られた試料の石鹸について、「まとまる」〜「クリーム状」のものについて、下記の試験を行いその結果を表３に示す。
（泡立ち）常温の水道水にて、手で泡立てた際の泡立ち感を確認し３段階で評価した。評価は次の通りである。
「×」…極端に泡立ちが悪く、市販が困難。
「○」…通常の泡立ちで、市販が可能。
「◎」…泡立ちがとても良い。

(Test) About the soap of the obtained sample, the following test was done about "Marumaru"-"cream form", and the result is shown in Table 3.
(Bubbling) The feeling of bubbling when hand bubbling was confirmed with room-temperature tap water and evaluated in three stages. The evaluation is as follows.
“×”: Extremely poor foaming and difficult to market.
“○”: Normal foaming and can be marketed.
“◎”… Bubbling is very good.

(Skin feel) Ten panelists confirmed the skin feel when using freshly foamed hands with tap water at room temperature, and each person evaluated in three stages, and the total was displayed. The evaluation is as follows.
“1”: Same as ordinary commercially available framed soap.
“2”… It feels moist and soft.
“3”… It feels greasy.

As described above, in the examples of the present invention, it was confirmed that foaming had no particular problem and that any soap with a moist and soft feel could be obtained. The state of the obtained soap varies depending on the manufacturing method and ingredients of the soap base, and also varies depending on the type of the fat and oil component. In any case, if the amount of the fat and oil is small, the property is powdery. It cannot be put together into a lump, it becomes solid as the blending amount increases, and when it is further increased, it becomes a paste, but if it is increased too much, it becomes liquid, and it is confirmed that the additional oil component may not be fully blended. It was.

This invention provides the manufacturing method which can obtain said solid soap, and the soap base | substrate which uses the alkali salt of the said fatty acid obtained by reaction of a C8-C24 fatty acid and an alkali agent as a component In contrast, a moisture adjustment step for adjusting moisture, a subdivision step for subdividing a soap base before or after the moisture adjustment step, and adding and adding an additional fat component to the subdivided soap base The water adjustment step is a step of drying the soap base so that the amount of water in the soap base is 3 to 20% by mass, and the additional fat component is subjected to the reaction. The kneading step is a step of blending and kneading 30 to 80% by mass of the soap base and 20 to 70% by mass of the additional fat and oil component, not in a powdery or liquid state. It is characterized by obtaining a solid soap that is in a solid state of a lump-like state, a solid, a cream that is a fluid paste, or a gel that is a non-flowable paste To do.

Claims (6)

In a soap base mainly composed of an alkali salt of a higher fatty acid obtained by the reaction of a higher fatty acid and an alkaline agent, a solid soap formed by adding additional ingredients and kneading,
At least one of the additional raw materials is an additional oil / fat component that has not undergone the reaction, and the additional oil / fat component swells the main component to form a solid or a paste. Solid soap. 2. The oil-rich solid soap according to claim 1, wherein the additional fat component is blended in an amount of 10% by mass or more. 3. The oil-rich solid soap according to claim 1, wherein a moisture content in the soap base is 90% or less of a reference moisture content (that is, a moisture content in a soap base in a normal soap). The soap base of 30 to 80% by mass and the additional fat and oil component of 20 to 70% by mass are blended, and the amount of water in the soap base is 3 to 20% by mass. Oil-rich solid soap according to crab. A moisture adjustment step for adjusting the moisture content of a soap base mainly composed of an alkali salt of a higher fatty acid obtained by a reaction between a higher fatty acid and an alkaline agent;
A kneading step of adding an oil and fat component and kneading the soap base that has been moisture-adjusted,
The moisture adjustment step is a step of drying the soap base until it becomes less than the reference moisture content of the soap (that is, the amount of moisture in the soap base in normal soap),
A method for producing a solid soap in which an oil-rich solid soap in which the main component is swollen by an additional oil and fat component added in the kneading step to form a solid or a paste is obtained. The method for producing a solid soap according to claim 5, further comprising a subdividing step of subdividing the soap base before or after the moisture adjusting step.