TW201903243A - Surface treatment composition - Google Patents

Abstract

The objective of the present invention is to provide a surface treatment composition which, by being applied to the surface of an object to be treated, may readily confer water-absorbing properties and water-repelling properties to the surface. This surface treatment composition comprises (A) a water-absorbing polymer, (B) an oily component, (C) water, and (D) an emulsifier or a dispersant. Preferably, the water and the water-absorbing polymer in the surface treatment composition are dispersed in the oily component phase by the emulsifier or the dispersant. It is also preferable that the surface treatment composition contain (A) the water-absorbing polymer in an amount between 5% by mass and 70% by mass inclusive, (B) the oily component in an amount between 10% by mass and 60% by mass inclusive, (C) the water in an amount between 10% by mass and 70% by mass inclusive, and (D) the emulsifier or the dispersant in an amount between 0.1% by mass and 20% by mass inclusive.

Description

Surface treatment composition

The present invention relates to a composition for surface treatment.

Compositions in which a water-absorbing polymer is dispersed in a liquid are known. For example, Patent Document 1 describes a polymer dispersion composition obtained by dispersing a swelling polymer and a non-aqueous carrier with an oil-in-water surfactant. The composition is used in the form of emulsion, cream, ointment, gel, milk, spray, foam, and the like. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Publication No. 2007-531811

[Problems to be Solved by the Invention]

However, although a water-absorbent polymer can absorb and retain a liquid, if it is pressurized in a state in which water is held, the liquid may seep back. Therefore, it is desirable to impart water repellency to the water-absorptive polymer and prevent liquid from seeping back. However, since water absorption and water repellency have opposite properties, it is difficult to achieve both.

Therefore, an object of the present invention is to provide a surface treatment composition that can simultaneously provide water absorption and water repellency to the surface of a treatment target, thereby imparting water resistance. [Technical means to solve the problem]

The present invention provides a surface treatment composition containing the following (A), (B), (C), and (D). (A) Water-absorbing polymer. (B) Oily ingredients. (C) Water. (D) Emulsifier or dispersant.

Moreover, this invention provides the manufacturing method of a water-absorbent article which has the following process: The surface of any member which comprises the said water-absorbent article is processed with the said surface processing composition.

In addition, the present invention provides a surface treatment method for a to-be-processed object, which includes the step of treating the surface of the to-be-processed object with the surface treatment composition described in any one of the above.

The present invention also provides a method for producing a composition for surface treatment, which comprises emulsifying an oily component and water with an emulsifier or dispersant to prepare an emulsified product, and mixing the emulsified product with a water-absorbing polymer to make Water contained in the emulsion is absorbed in the water-absorbing polymer, and the water-absorbing polymer that has absorbed water is dispersed in the oily component.

The present invention also provides a method for improving the water absorbency of a surface of an object to be treated, which comprises the steps of applying the surface treatment composition to the surface of the object to be treated to increase the water absorbency of the surface.

Furthermore, the present invention provides a method for suppressing water evapotranspiration, which comprises applying the surface treatment composition to the surface of an object to be treated, thereby suppressing water evapotranspiration from the surface. [Effect of the invention]

According to the present invention, there is provided a composition for surface treatment, which can easily impart water absorption and water repellency to the surface by applying it to the surface of the object to be treated, thereby imparting water resistance.

Hereinafter, the present invention will be described based on its preferred embodiments. The present invention relates to a composition for surface treatment. The surface treatment composition of the present invention is generally fluid or solid in its use state. By applying the composition for surface treatment of the present invention to an object to be treated, the application area of the surface treatment composition in the surface of the object to be treated simultaneously obtains absorption and retention of the liquid and water repellency, thereby Get waterproof. In addition, in the present invention, the term "waterproofness" means that it exhibits both the effect of absorbing liquid obtained by blending a water-absorbing polymer and the ability to prevent liquid from penetrating into the processed object by imparting water repellency to the processed object. The effect of stains or the effect of preventing the liquid from leaking from the coated object.

The water-absorbing polymer composition of the present invention contains (A) a water-absorbing polymer as one of its constituents. The water-absorptive polymer is preferably a material that forms a hydrogel that absorbs and retains water and swells. For example, it is preferable to use water capable of absorbing 20 times or more, especially 30 times or more of its own weight. Examples of the water-absorptive polymer include sodium polyacrylate, (acrylic acid-vinyl alcohol) copolymer, sodium polyacrylate crosslinked body, (starch-acrylic acid) graft copolymer, and (isobutylene-maleic anhydride). Copolymers and their saponifications, polyaspartic acid, etc. These water-absorptive polymers may be used individually by 1 type, and may be used in combination of 2 or more type.

The water-absorbing polymer of (A) generally has a particle shape in the water-absorbing polymer composition of the present invention. The shape of the particles of the water-absorptive polymer includes, for example, a spherical type, a spherical agglomerated type, a block type, a bag type, and an amorphous type. In the present invention, any shape can be used without particular limitation.

Regarding the water-absorptive polymer of (A), from the viewpoint of ensuring a sufficient liquid absorption capacity regardless of the shape described above, the water absorption amount thereof is preferably 5 g / g or more at 25 ° C. It is more preferably 10 g / g or more, more preferably 15 g / g or more, and still more preferably 25 g / g or more. From the standpoint of not falling off due to swelling caused by absorption of liquid, it is preferably 60 g / g or less, more preferably 50 g / g or less, and even more preferably 45 g / g or less. Specifically, the water-absorbing polymer of (A) is preferably 5 g / g or more and 60 g / g or less at 25 ° C, more preferably 10 g / g or more and 50 g / g or less, and more preferably 15 g / g or more and 45 g / g or less, and more preferably 25 g / g or more and 45 g / g or less.

The water absorption amount is measured in accordance with JIS K 7223 (1996). A nylon woven fabric (sold by Sanli Co., Ltd., product name: nylon mesh, specifications: 250 mesh) was cut into a rectangle with a width of 10 cm and a length of 40 cm and folded in half at the center of the length direction. The two ends were heat-sealed to produce a width of 10 cm (inside 9 cm), 20 cm nylon bag. Then, 1.00 g of the water-absorbent polymer as a measurement sample was accurately weighed, and placed on the bottom of the produced nylon bag in a uniform manner. Then, the nylon bag in which the sample was put was immersed in physiological saline (0.9% by mass sodium chloride aqueous solution) adjusted to 25 ° C. Then, one hour after the start of the immersion, the nylon bag was taken out from the physiological saline, suspended for 1 hour in a vertical state, and the water was discarded, and then dewatered using a centrifugal dehydrator (manufactured by Kokusan Co., Ltd., model H-130C). Dehydration conditions were set at 143 G (800 rpm) for 10 minutes. After dehydration, the mass of the sample was measured, and the target water absorption was calculated according to the following formula. Water absorption (g / g) = (a'-b-c) / c In the above formula, a 'represents the total mass of the sample and the nylon bag after centrifugal dehydration (g), and b represents the water absorption (drying) of the nylon bag When), c represents the mass (g) of the sample before water absorption (during drying). The measurement was performed 5 times (n = 5), and the value at each of the upper and lower points was removed, and the average value of the remaining 3 points was used as the measured value. The measurement was performed at 23 ± 2 ° C. and a humidity of 50 ± 5%. The sample was stored in the same environment for more than 24 hours before the measurement, and then the measurement was performed.

The surface treatment composition of the present invention contains, in addition to the water-absorptive polymer (A), an oily component (B) as one of the constituents. Oily components generally have a hydrocarbon chain and are substances that are immiscible with water. Oily ingredients include not only oils and fats in a narrow sense, but also organic compounds that are immiscible with water. As an example of an oily component. Examples include, but are not limited to, vegetable oil, animal oil, mineral oil, fatty acid ester, squalane, paraffin, wax, higher fatty acid, and higher alcohol. These oily components may be used individually by 1 type, and may be used in combination of 2 or more type. The oily component may be liquid or solid at 25 ° C.

Specific examples of the oily component include linear or branched hydrocarbon oils such as liquid paraffin, light isoparaffin, liquid isoparaffin, mineral oil, squalane, and squalene; avocado oil, and Australian walnut Oil, olive oil, rapeseed oil, sesame oil, wheat germ oil, linseed oil, cottonseed oil, soybean oil, palm oil, coconut oil, castor oil, jojoba oil, sunflower oil, camellia oil, corn oil and other vegetable oils Animal oils such as liquid lanolin; isopropyl myristate, octyldodecyl myristate, isopropyl isostearate, isononyl isononanoate, isododecyl isononanoate, Butyl stearate, oleic acid oleate, octyldodecyl ricinoleate, octyl hydroxystearate, 2-ethylhexyl p-methoxycinnamate, neopentyl glycol dicaprate, Diisostearyl malate, polyglyceryl diisostearate, polyglyceryl triisostearate, glyceryl diisostearate, glyceryl triisostearate, tris (caprylic / capric) glycerol Ester, tri-2-ethylhexanoic acid glyceride, tri-2-ethylhexanoic acid trimethylolpropane, trimethylolpropane triisostearate, dl-α- Fatty acid esters such as tocopherol, dl-α-tocopheryl nicotinate; dimethyl polysiloxane, dimethyl cyclopolysiloxane, methylphenyl polysiloxane, methyl hydrogen polysiloxane Polysiloxanes such as alkane, higher alcohol-modified organopolysiloxane; paraffin wax, ceresin wax, synthetic hydrocarbon wax, Fischer-Tropsch wax, microcrystalline wax, polyethylene wax, ethylene propylene copolymer, candela wax, beeswax And waxes such as carnauba wax; fluorine oils such as fluoropolyether and perfluoroalkyl ether polysiloxane; as creamy or creamy oily ingredients, trilanolin fatty acid glyceride, soft lanolin fatty acid, vaseline, branch or Hydroxylated fatty acid cholesterol ester, dipentaerythritol fatty acid ester (dipentaerythritol hexahydroxystearate, etc.), hydrogenated castor oil isostearate, hydrogenated castor oil monohydroxystearate, tris (octanoic acid / decanoic acid / (Myristic acid / stearic acid) glyceride, myristyl lactate, hydrogenated castor oil dimer linoleate, (phytosterol / isostearyl alcohol / cetyl alcohol / stearyl alcohol / behenyl alcohol) dimer Oleate, phytosterol oleate, bis (phytosterol / behenyl alcohol / 2-octyldodecanol) N-lauryl-L-glutamic acid Esters, etc.

The surface treatment composition of the present invention contains, in addition to the water-absorptive polymer (A) and the oily component of (B), water of (C) as one of the constituents. Examples of the water include purified water, distilled water, and ion-exchanged water.

The surface treatment composition of the present invention further contains (D) an emulsifier or a dispersant. The type of the emulsifier and dispersant is not particularly limited as long as it can emulsify the oily component of (B) and the water of (C). As the emulsifier or dispersant of (D), for example, various surfactants can be used. As such a surfactant, for example, a nonionic surfactant or an anionic surfactant can be preferably used. Examples of the nonionic surfactant include fatty acid polyol esters, polyether-modified polysiloxanes, polyoxyethylene sorbitan fatty acid esters, and sorbitan fatty acid esters. Examples of the anionic surfactant include sodium fatty acid, potassium fatty acid, sodium polyalcohol sulfate, aliphatic polyalcohol ammonium sulfate, sodium polyoxyethylene alkyl ether, and sodium dialkylsulfosuccinate. . These surfactants may be used individually by 1 type, and may be used in combination of 2 or more type.

The surface treatment composition of the present invention containing each of the above components is preferably water-absorptive water (C) and water-absorptive water (A) in terms of easily imparting water absorption and water repellency to the surface of the object to be treated. A dispersion in which the polymer is dispersed in the phase of the oily component of (B). In this case, it is considered that the emulsifier or dispersant of (D) exists near the interface between the water of (C) and the water-absorbing polymer of (A) and the phase of the oily component of (B). In this dispersion, water in (C) as the dispersed phase and water-absorbent polymer in (A) are dispersed in the phase of the oily component (B) as the continuous phase. It is preferable that the dispersion is in a fluid state or a solid state without fluidity in terms of ease of processing the surface of the object to be treated. When the fluidity is expressed as a viscosity, the viscosity at 25 ° C is preferably 100 mPa · s or more.

However, since the water-absorbent polymer of (A) is used for the purpose of absorbing and retaining water, it is generally a non-aqueous state in the state of the raw material. In contrast, the present invention is characterized in that a water-absorbing polymer and water are used, and the water-absorbing polymer is in a state containing water. In order to make the composition for surface treatments of the present invention into the above-mentioned dispersion, for example, the blending ratio of each component constituting the surface treatment composition of the present invention may be set as described below.

In the surface treatment composition of the present invention, the water-absorbing polymer of (A) is converted to a non-aqueous state, and preferably contains 5% by mass or more, more preferably contains 10% by mass or more, and more preferably contains 15% by mass. %the above. The water-absorbing polymer of (A) preferably contains 70% by mass or less, more preferably contains 60% by mass or less, more preferably contains 50% by mass or less, and even more preferably contains 45% by mass or less. In the composition for surface treatment of the present invention, the water-absorbing polymer of (A) preferably contains 5 mass% or more and 70 mass% or less, and more preferably contains 10 mass% or more and 60 mass% or less, and more preferably It is 15 mass% or more and 50 mass% or less, and more preferably 15 mass% or more and 45 mass% or less. By containing the water-absorptive polymer (A) in this range, the water absorption performance can be maintained, and the evapotranspiration suppression effect of water can be obtained. In addition, it is possible to prevent the water-absorbent polymer from falling off the surface of the object after water absorption.

In the surface treatment composition of the present invention, the oily component (B) preferably contains 10% by mass or more, more preferably 15% by mass or more, and more preferably 17% by mass or more. The oily component (B) preferably contains 60% by mass or less, more preferably contains 55% by mass or less, and more preferably contains 50% by mass or less. In the composition for surface treatment of the present invention, the oily component of (B) preferably contains 10% by mass or more and 60% by mass or less, further preferably contains 15% by mass or more and 55% by mass or less, and more preferably contains 17% by mass to 50% by mass. By containing the oily component (B) in this range, the water repellent effect on the surface of the object to be treated can be effectively obtained. Moreover, the water absorption of the surface of a to-be-processed object can be improved. Furthermore, since the oily component containing (B) is included in this range, the tactile sensation such as stickiness is hardly found after water absorption, and the tactile sensation on the surface of the object to be treated becomes extremely good.

In the surface treatment composition of the present invention, the water in (C) preferably contains 10% by mass or more, more preferably 15% by mass or more, more preferably 20% by mass or more, and even more preferably 30%. Above mass%. The water in (C) is preferably contained in an amount of 70% by mass or less, more preferably 60% by mass or less, more preferably 50% by mass or less, and even more preferably 40% by mass or less. In the surface treatment composition of the present invention, the water of (C) preferably contains 10% by mass or more and 70% by mass or less, further preferably contains 15% by mass or more and 60% by mass or less, and more preferably contains 20% by mass. It is more than 50% by mass and not more than 50% by mass, and more preferably contains not less than 30% by mass and not more than 40% by mass. Since water containing (C) in this range can obtain a moderate water absorption speed, and a large amount of water absorption can be obtained, it is preferable.

In the composition for surface treatment of the present invention, the emulsifier or dispersant of (D) preferably contains 0.1% by mass or more, more preferably contains 0.2% by mass or more, more preferably contains 0.3% by mass or more, and more preferably The content is preferably 1.2% by mass or more, and even more preferably 1.4% by mass or more. The emulsifier or dispersant of (D) preferably contains 20% by mass or less, more preferably contains 15% by mass or less, more preferably contains 10% by mass or less, even more preferably contains 2.7% by mass or less. The content is more preferably 2.0% by mass or less. In the composition for surface treatment of the present invention, the emulsifier or dispersant of (D) preferably contains from 0.1% by mass to 20% by mass, and more preferably contains from 0.2% by mass to 15% by mass, more preferably The content is preferably 0.3% by mass or more and 10% by mass or less, more preferably 1.2% by mass or more and 2.7% by mass or less, and even more preferably 1.4% by mass or more and 2.0% by mass or less. The emulsifier or dispersant containing (D) in this range can stably obtain an emulsion of the oily component (B) and the water of (C), and can stably disperse the (A) water-absorbing polymer. In addition, since the emulsifier or dispersant (D) is present in the surface treatment composition, the surface treatment composition can be removed by washing in accordance with a common method, which is preferable.

The surface-treating composition of the present invention can impart water-repellency by applying the composition to the surface of an object to be treated to impart absorption and retention of water and water repellency to an application site, for example. Generally speaking, the absorption and retention properties of a liquid and the water repellency are opposite properties, but according to the present invention, it is possible to achieve the absorption retention properties and the water repellency of a liquid having these opposite properties at the same time to obtain water resistance. Therefore, when the surface treatment composition of the present invention is used as, for example, a urine absorbent, it can absorb and retain urine and effectively prevent re-seepage or exudation of temporarily absorbed urine. Similarly, when the surface-treating composition of the present invention is used as a sweat absorbent, it can absorb and maintain sweat and effectively prevent the permeation or exudation of temporarily absorbed sweat. Furthermore, when the surface treatment composition of the present invention is used as a blood absorbent, the blood can be absorbed and held, and it is possible to effectively prevent the blood from being temporarily absorbed or bleed back. Regardless of the purpose of use, in the case where clothing is particularly used as the object to be treated with the surface-treating composition of the present invention, as the clothing, the wearing object that directly contacts the excretion part of the wearer is used as the application object, and A method for treating a part of the wearing article directly contacting the excretory part of the wearer using the surface-treating composition of the present invention allows the absorbent article to be easily manufactured from the wearing article. It is particularly preferable to use the composition for surface treatment of the present invention to treat the surface of the various clothes represented by wearing articles on the side away from the skin. In short, the water-absorbent article can be easily produced by a method having a step of treating the surface of any member constituting the water-absorbent article using the surface treatment composition of the present invention. As described above, by applying the surface treatment composition of the present invention to various application objects, liquid absorption and water repellency are imparted to the application objects. Of course, the water-absorbing body of a general water-absorbing article may contain the composition for surface treatment of the present invention. Common water-absorbent articles include, for example, OK stretchers, disposable diapers, sweat-absorbent pads, urine-absorbent pads, menstrual tampons, sanitary pads, and vaginal discharge pads.

The above description is about a person who uses the surface-treating composition of the present invention to treat the surface of a fibrous material, but the object to be treated to which the surface-treating composition of the present invention is applied is not limited to the fibrous material. Examples of the object to be treated include porous materials such as sponges and foams, and hard surfaces such as metals, plastics, and minerals. Specific examples of the object to be treated include, in addition to the above-mentioned water-absorbent articles, velvet blankets, floors, films with or without elasticity, sheets with or without elasticity, and tapes with or without elasticity. Furthermore, the skin of a living body can be used as a treatment object. Therefore, according to the present invention, there is also provided a method for surface treatment of an object to be treated, which includes a step of treating the surface of the object to be treated with the composition for surface treatment. Furthermore, according to the present invention, there is also provided a method for improving the water absorbency of a surface of an object to be treated, which comprises the step of applying a surface treatment composition to the surface of the object to be treated to increase the water absorbency of the surface.

Furthermore, according to the present invention, there is also provided a method for suppressing water evaporation, which is a method of applying a surface treatment composition to the surface of the skin as an object to be treated, thereby suppressing the evaporation of water from the surface. For example, the wound surface can be protected and cured by treating the wound surface by using the surface treatment composition of the present invention as a wound covering material. In particular, by treating the wound surface of an open wound with less exudate by using the surface treatment composition of the present invention, a moist environment that suppresses water evaporation can be provided and wound healing can be promoted. After applying the surface treatment composition of the present invention to a wound surface, the area may be protected with an OK band or the like.

The method for treating the surface of the object to be treated with the surface treatment composition of the present invention is not particularly limited, as long as an appropriate method is adopted in accordance with the properties of the surface treatment composition. For example, when the surface treatment composition of the present invention is in a solid state at 25 ° C, the surface treatment composition may be treated with the rod-shaped surface treatment composition. When the surface treatment composition of the present invention is a fluid at 25 ° C., the surface of the object to be treated can be treated with the surface treatment composition while being stored in a roll coating container. In addition to these methods, for example, a method using a die coater, a slit coater, a roll coater or the like, a method using a gravure printing machine, or a sprayer can be used.

Figures 1 (a) and (b) schematically show the state when the surface treatment composition of the present invention is applied to cloth 1. As shown in FIG. 1 (a), when the surface treatment composition of the present invention is applied to cloth 1, a coating film 10 of the composition is formed on one side of the cloth. As time passes, as shown in FIG. 1 (b), water evaporates from the film 10 and is removed, and the oily component 11 in the film diffuses and penetrates into the cloth 1. In order to evaporate water, the coating film 10 may be heated. After the water evaporates, the water-absorbing polymer 12 in the film 10 is held in the film 10. This coating film 10 has both water absorption and water repellency.

2 (a) and 2 (b) are schematic diagrams illustrating the water absorption and water repellency of the film 10 shown in FIG. As shown in FIG. 2 (a), if the cotton 1A on the opposite side of the formation surface of the film 10 from the cloth 1 contacts the water 2, the water 2 is absorbed by the cloth 1 instantly. As time passes, the water absorbed by the cloth 1 reaches the water-absorbing polymer 12 held by the cover film 10 as shown in FIG. 2 (b), and is absorbed and held by the water-absorbing polymer 12. The water-absorptive polymer 12 absorbing and retaining the water 2 swells according to the degree of absorption. In this way, according to the coating film 10, the interval between the absorption of the water 2 of the cloth 1 and the absorption of the water 2 of the water-absorbing polymer 12 is generated. By allowing the water 2 to be absorbed by the cloth 1 and the water-absorbing polymer 12, it is possible to prevent the water 2 from oozing out of the film 10. Regarding the water-repellent effect of the film 10, as shown in FIG. 2 (b), even if the film 10 is in contact with water 2A, the film 10 has an oily component as a continuous phase, and the continuous phase contains a water-absorbing polymer 12, so it will prevent the penetration of water 2A through the membrane 10. That is, the cover film 10 is a water-repellent material having both water absorption and water repellency.

As described above, by applying the surface treatment composition of the present invention to, for example, various items of clothing, such as underwear, which are in direct contact with the wearer's excretory portion, it is possible to impart liquid-absorbency to the application area And water repellency. In other words, the application area can be used as the water-absorbing body of the water-absorbing article. In this way, the surface treatment composition of the present invention can easily make clothes into an absorbent article. The water-absorbent article thus obtained becomes a person who effectively prevents the liquid excreted from the wearer from oozing out to the outer garment (for example, trousers, panties, shorts, etc.), and effectively prevents the liquid from seeping back.

In the case where, for example, a panty which is a piece of clothing directly contacting the skin of a user is treated with the composition for surface treatment of the present invention, the outer surface side of the panty surface, that is, away from the user's skin can be used by the composition Either one or both of the front side and the inner side, that is, the side close to the user's skin, are processed. In particular, if the outer surface side of the panty surface, that is, the side away from the user's skin is treated with the surface treatment composition of the present invention, the amount of liquid return and the amount of liquid exudation are further reduced, which is preferable. In detail, when the liquid discharged to the inner surface side of the panties reaches the outer surface side of the panties through the cloth constituting the panties, the water-absorbing polymer contained in the surface treatment composition of the present invention is adhered to the outer surface side. Therefore, the liquid is absorbed by the water-absorptive polymer and it is not easy to cause the liquid to seep back. In addition, the liquid reaching the outer surface side of the underpants is hindered from moving by the coating film formed by the oily component contained in the surface-treating composition of the present invention, and it is difficult for the liquid to leak out.

The water repellency imparted to the surface of the object to be treated by the surface treatment composition of the present invention can be removed by washing the object to be treated with water. As a removal method using washing, it can be removed by washing with water in accordance with a usual method. That is, by washing the object to be treated with the surface treatment composition of the present invention, the surface treatment composition can be removed and restored to the state of the object before treatment. Such a surface-treating composition capable of resetting water repellency by washing, particularly by washing, is not an industrial implementation of the surface treatment of the object to be treated using the surface-treating composition, but is performed by an individual or by This is particularly useful in situations that are implemented within the home. That is, for example, "after using the object treated with the surface treatment composition of the present invention, the object to be treated can be washed and stored as the original object, and thereafter, the object to be treated must be stored. In the case where water repellency is imparted again, one of a series of operations of "providing water repellency by carrying out the surface treatment of the object to be treated using the surface treatment composition of the present invention" is repeatedly performed by an individual or at home.

Next, a preferred method for producing the surface treatment composition of the present invention will be described. The surface treatment composition of the present invention is roughly divided into (i) a step of preparing an emulsion, and (ii) a step of mixing the emulsion and a water-absorbing polymer. Each step will be described below.

In the step of preparing the emulsion of (i), the oily component of (B) and the water of (C) are emulsified by the emulsifier or dispersant of (D) to prepare an emulsion. The method for preparing the emulsified product is not particularly limited, and a conventionally known method can be adopted. For example, a known emulsifier can be used for emulsification. When the oily component of (B) is solid, it may be heated to make it a fluid state and emulsified. The prepared emulsified product may be an oil-in-water type, or may be an oil-in-water type. The type of emulsion to be obtained depends on, for example, the amount ratio of the water phase to the oil phase, or the type of emulsifier or dispersant used.

After the emulsion is obtained in this way, step (ii) is performed. In this step, the emulsion is mixed with the water-absorbing polymer of (A). The mixing ratio of the two is preferably adjusted so that the content ratio of the components (A) to (D) in the finally obtained surface treatment composition falls within the above-mentioned range. By mixing the two, water contained in the emulsion is absorbed by the water-absorbing polymer. By absorbing water, the emulsified structure of the emulsion is destroyed, and a continuous phase containing an oily component is generated. In addition, by the action of the emulsifier or dispersant of (D), a water-absorbing polymer having absorbed water is dispersed in the continuous phase containing the oily component. In this manner, a target surface treatment composition was obtained.

In the case where the oily component of the surface treatment composition (B) thus obtained is a fluid at 25 ° C, the composition also becomes a fluid at 25 ° C. On the other hand, when the oily component of (B) is solid at 25 ° C, the composition is also solid at 25 ° C.

Regarding the embodiment described above, the present invention further discloses the following surface treatment composition. <1> A surface treatment composition including the following (A), (B), (C), and (D). (A) Water-absorbing polymer. (B) Oily ingredients. (C) Water. (D) Emulsifier or dispersant.

<2> The surface treatment composition according to the above <1>, which contains (A) at 5 mass% to 70 mass%, (B) at 10 mass% to 60 mass%, and 10 (C) is not less than 70% by mass, and (D) is not less than 0.1% by mass and not more than 20% by mass. <3> The surface treatment composition according to the above <1> or <2>, which is obtained by dispersing the water of (C) and the water-absorbing polymer of (A) in the phase of the oily component of (B) . <4> The surface treatment composition according to the above <3>, wherein the emulsifier or dispersant of (D) is present in the water of (C) and the water-absorbing polymer of (A) and the oily component of (B) Near the interface of the phase. <5> The surface treatment composition according to any one of the above <1> to <4>, wherein the oily component of (B) is a vegetable oil, an animal oil, a mineral oil, a fatty acid ester, squalane, paraffin, Wax, higher fatty acids or higher alcohols. <6> The composition for surface treatment as described in any one of said <1> to <5>, wherein the emulsifier or dispersant of (D) is a nonionic surfactant or an anionic surfactant.

<7> The surface treatment composition according to the above <6>, wherein the non-ionic surfactant is a fatty acid polyol ester, a polyether-modified polysiloxane, a polyoxyethylene sorbitan fatty acid ester, or sorbitol Anhydride fatty acid ester. <8> The composition for surface treatment according to the above <6>, wherein the anionic surfactant is sodium fatty acid sodium, potassium fatty acid, aliphatic polyalcohol sodium sulfate, aliphatic polyalcohol ammonium sulfate, polyoxyethylene alkyl ether Sodium sulfate, or sodium dialkylsulfosuccinate. <9> The composition for surface treatments as described in any one of said <1> to <8> whose water-absorptive polymer of (A) is a state containing water. <10> The surface treatment composition according to any one of the above <1> to <9>, wherein the water-absorbing polymer of (A) is converted into a non-aqueous state, and preferably contains 5% by mass or more and 70% by mass or less. <11> The composition for surface treatments as described in any one of said <1> to <10> whose (B) oily component contains 10 mass% or more and 60 mass% or less. <12> The composition for surface treatments as described in any one of said <1> to <11> whose water of (C) contains 10 mass% or more and 70 mass% or less.

<13> The composition for surface treatments as described in any one of said <1> to <12> whose emulsifier or dispersant of (D) contains 0.1 mass% or more and 20 mass% or less. <14> The surface treatment composition according to any one of the above <1> to <13>, which is used to treat the surface of a fiber material. <15> A method for producing a water-absorbent article, comprising the steps of: using a surface treatment composition as described in any one of the items <1> to <14> above to constitute any member constituting the water-absorbent article; Surface treatment. <16> The method for producing a water-absorbent article according to the above <15>, wherein the member includes a fiber material, and a surface of the fiber material is treated. <17> A surface treatment method for a to-be-processed object, comprising the steps of: treating the surface of the to-be-processed object with the surface treatment composition according to any one of the above-mentioned <1> to <14>. <18> The surface treatment method according to the above <17>, wherein the object to be treated is clothes, and the surface of the clothes on the side away from the skin is treated with the surface treatment composition.

<19> The surface treatment method according to the above <17> or <18>, which is performed in the form of a rod or in a state of being stored in a roll-coated container using the surface treatment composition. <20> A method for producing a surface treatment composition, which comprises emulsifying an oily component and water with an emulsifier or dispersant to prepare an emulsion, and mixing the above-mentioned emulsion with a water-absorbing polymer to make the Water contained in the emulsion is absorbed into the water-absorbing polymer, and the water-absorbing polymer having absorbed water is dispersed in the oily component. <21> A method for improving the water absorption of a surface of an object to be treated, comprising the steps of applying the surface treatment composition according to any one of the above <1> to <14> to the surface of the object to be treated, and improving Water absorption of this surface. <22> A method for inhibiting water evapotranspiration, which comprises applying the surface treatment composition according to any one of the above <1> to <14> to the surface of an object to be treated, thereby suppressing water evapotranspiration from the surface. <23> A method for removing a surface treatment composition, which comprises subjecting the surface of the object to be treated to the object to be treated as described in any one of the above <1> to <14>. The surface treatment composition is washed away from the surface of the object to be treated. [Example]

Hereinafter, the present invention will be described in more detail through examples. However, the scope of the present invention is not limited to this embodiment. Unless otherwise stated, "%" means "mass%".

[Examples 1 to 10] The oily components, water, and emulsifier shown in Table 1 below were mixed at the ratios shown in the table, and emulsified according to a usual method. In Examples 2, 3, and 10, the oily component was emulsified by heating to a temperature at which the oily component became a fluid state. The obtained emulsion and the water-absorbing polymer were mixed at a ratio shown in Table 1 to obtain a target surface treatment composition. The details of the product names shown in Table 1 are shown in Table 2.

[Comparative Examples 1 to 5] The oily components, water, and emulsifier shown in Table 1 below were mixed at the ratios shown in the table, and emulsified according to a usual method.

[Evaluation] The surface treatment compositions obtained in the examples and comparative examples were evaluated as shown in Table 3 below. The results are shown in this table. The evaluation methods shown in this table are as follows.

[Water Absorption of Composition for Surface Treatment] A 50 mL polypropylene centrifuge tube (manufactured by iwaki) was charged with 1.0 g of the composition for surface treatment, and 40 g of physiological saline was added and dispersed by ultrasonic waves for 2 minutes. Using an incubator manufactured by Taitec Co., Ltd., the centrifuge tube was continuously shaken at 25 ° C for 4 hours at a speed of 8 on a scale. Thereafter, the centrifuge tube was continuously centrifuged at 3000 rpm for 20 minutes using a tabletop centrifuge H-28F (manufactured by Kokusan Co., Ltd.) to precipitate a gel. The supernatant was removed and the quality of the precipitated gel was determined. The water absorption amount was calculated by the following formula. Water absorption (g / g) = (mass of the precipitated gel-mass of the composition for surface treatment) / mass of the composition for surface treatment

[One-drop absorption rate after treatment (treated surface)] For a single surface of a 100 mm × 100 mm cotton cloth (fine white cloth No. 3, according to JIS-L0803, white cloth attached for dyeing fastness test) The treatment composition was subjected to a coating treatment, and left to stand at 25 ° C for 2 hours to dry. Using a dropper, drop 1 drop (0.05 g) of normal saline (colored with blue No. 1 0.1%) on the coated surface of the treated cloth, and measure 1 drop of normal saline on the treated cloth. The time from the absorption and diffusion to the inside and the gap of the treatment cloth until the reflected light of the physiological saline on the surface of the treatment cloth is not observed. The measurement is an average of 3 points, and this value is made into one drop absorption time (s).

[One-drop absorption rate after treatment (non-treated surface)] By the same method as the above-mentioned one-drop absorption rate after treatment (treated surface), a specific amount of the surface treatment composition is coated and treated. Handle cloth. Using a dropper, drop 1 drop (0.05 g) of physiological saline (colored with blue No. 1 0.1%) on the non-coated surface of the coated treatment cloth, and measure 1 drop of physiological saline dripped on the treatment cloth. The time from the absorption and diffusion to the inside and the gap of the treatment cloth until the reflected light of the physiological saline on the surface of the treatment cloth is not observed. The measurement is an average of three times, and this value is defined as one drop absorption time (s).

[Washing test] (1) Preparation of evaluation cloths To a 100 mm × 100 mm cotton cloth (fine white cloth No. 3, according to JIS-L0803, white cloth attached for dyeing fastness test), with a specific amount in Table 1 The compositions of the illustrated examples and comparative examples were subjected to a coating treatment, and then left to stand at room temperature and dried for 2 hours to prepare a treated cloth. One piece of the treated cloth was put into a 500 mL polyethylene bottle with commercially available weak alkaline lotion (manufactured by Kao Corporation, Attack Highly Active Bio EX (registered trademark)) and tap water, and Taitec Corporation was used. The manufactured incubator was washed while shaking at a speed of 8 (detergent concentration 0.0667% by mass, using 300 mL of 20 ° C tap water, which is equivalent to a standard automatic washing machine program: washing 9 minutes-rinsing 2 Times-dehydration for 6 minutes). The treated cloth after washing was dried in a constant temperature room at 25 ° C. and 40% RH for 12 hours, and was used as an evaluation cloth.

(2) One-drop absorption speed (treatment surface) after washing The measurement of one-drop absorption speed (treatment surface) after washing of the evaluation cloth is based on the above [One-drop absorption speed (treatment surface) after treatment]. Method.

(3) One-drop absorption rate (non-treated surface) after washing The measurement of one-drop absorption rate (non-treated surface) after washing of the evaluation cloth is based on the above [One-drop absorption rate after treatment (non-treated surface) )].

[Tactile feel of the object to be treated (before absorption)] In the same manner as the above-mentioned evaluation method of [one drop absorption rate after treatment (treated surface)], cotton cloth (fine white cloth No. 3, according to JIS-L0803, dyeing fastness test The surface treatment composition was coated with a specific amount on one side of a white cloth), and it was left to stand at 25 ° C and dried for 2 hours. A finger was swiped on the coating treatment surface, and the finger touch evaluation was performed according to the following criteria. The measurement was performed 3 times. 5: Dry 4: Slightly dry 3: No change 2: Slightly sticky or sticky 1: Sticky

[Tactile feel of the object to be treated (after absorption)] In the same manner as the above-mentioned evaluation method of [1 drop absorption rate after treatment (treated surface)], a cotton cloth (fine white cloth No. 3, in accordance with JIS-L0803, a dyeing fastness test The surface treatment composition was coated with a specific amount on one side of a white cloth), and it was left to stand at 25 ° C and dried for 2 hours. Using a dropper, 5 drops (0.25 g) of physiological saline (colored with No. 1 blue 0.1%) was added dropwise at an interval of about 5 mm on the coated surface of the coated treatment cloth. A finger was swiped on the coated treatment surface 5 minutes after the physiological saline was absorbed, and the finger touch evaluation was performed according to the following criteria. The measurement was performed 3 times. 5: Dry 4: Slightly dry 3: No change 2: Slightly sticky or sticky 1: Sticky

[Exudation rate of liquid, water absorption rate and liquid return rate of the liquid] The first filter paper (manufactured by Advantec, No. 5c, 12 cm) was placed on a water platform, and Examples 1 to 5 and Comparative Examples 1 to 4 The treated cloth obtained by applying the composition to the coating treatment is arranged thereon such that the coated surface of the cloth becomes downward. In this state, 0.5 mL of a liquid in which physiological saline (manufactured by Otsuka Pharmaceutical Co., Ltd.) was colored blue was added dropwise toward the upper surface of the treatment cloth. Immediately after the dropwise addition, a second filter paper (Advantec, No. 5c, 12 cm) was placed thereon, and then an acrylic plate having a bottom area larger than the area covering the dropwise addition area was placed thereon, and continuously applied. The pressure corresponding to the wearing pressure is a pressure of 3 g / cm ² for 30 seconds. The first filter paper is assumed to be an outerwear (trousers), the processing cloth is assumed to be underwear, and the second filter paper is assumed to be a user's skin.

Next, the acrylic plate was removed, and the mass of the first filter paper before and after the dropwise addition of physiological saline was measured to determine the change in mass. This value is taken as the amount of bleeding of the liquid. The mass of the treated cloth before and after the dropwise addition of physiological saline was measured to determine the change in mass. This value is taken as the water absorption of the liquid. Furthermore, the mass of the second filter paper before and after the dropwise addition of physiological saline was measured to determine the change in mass. This value is used as the liquid return amount. Calculate the ratio of the amount of liquid exudation, the amount of liquid absorption or return to the total amount of liquid exudation, the amount of liquid absorption, and the amount of return liquid as the exudation rate (%) and the water absorption rate (%) of the liquid. , Liquid return rate (%).

[Table 1]

[Table 2] <Emulsifier> ＜ Water-absorbing polymer ＞ <Oil composition>

[table 3]

From the results shown in Table 3, it is clear that the surface treatment composition of each example is one having both water absorption and water repellency to achieve water resistance. In particular, it can be seen that if the composition for surface treatment of each embodiment is applied to the object to be treated, the object to be treated is washed, and the composition is applied again, the object to be treated can be given water absorption and water repellency again. Thereby, waterproofness is obtained.

1‧‧‧ cloth

1A‧‧‧cotton

2‧‧‧ water

2A‧‧‧Water

10‧‧‧ Laminated

11‧‧‧ oily ingredients

12‧‧‧ Water-absorbing polymer

FIG. 1 (a) is a schematic diagram showing a state immediately after the surface treatment composition of the present invention is applied to a to-be-processed object, and FIG. 1 (b) shows a state after a specific time has elapsed from the state shown in FIG. 1 (a). State diagram. FIG. 2 (a) is a schematic diagram showing a state immediately after water to be treated of the surface-treated composition to which the present invention is applied, and FIG. 2 (b) shows a state from the state shown in FIG. 2 (a). A pattern diagram of the state after a certain time has elapsed.

Claims (13)

A surface treatment composition comprising the following (A), (B), (C), and (D): (A) a water-absorbing polymer, (B) an oily component, (C) water, (D) emulsification Agent or dispersant. For example, the composition for surface treatment of Claim 1 contains (A) of 5 mass%-70 mass%, (B) of 10 mass%-60 mass%, and (B) of 10 mass%-70 mass (C) of not more than% includes (D) of not less than 0.1% by mass and not more than 20% by mass. For example, the surface treatment composition of claim 1 is obtained by dispersing the water of (C) and the water-absorbing polymer of (A) in the phase of the oily component of (B). The surface treatment composition according to claim 1, which is used for treating the surface of the fiber material. A method for manufacturing a water-absorbent article, comprising the steps of: treating the surface of any member constituting the water-absorbent article with a surface treatment composition as claimed in claim 1. The method for manufacturing a water-absorbent article according to claim 5, wherein the member includes a fiber material, and a surface of the fiber material is treated. A method for treating a surface of an object to be treated includes the steps of: treating the surface of the object to be treated with the composition for surface treatment of claim 1. The surface treatment method according to claim 7, wherein the object to be treated is clothes, and the surface of the clothes on the side away from the skin is treated with the surface treatment composition. The surface treatment method according to claim 7 is performed by using the above-mentioned surface treatment composition in the form of a rod or in a state of being stored in a roll coating container. A method for producing a composition for surface treatment, which comprises emulsifying an oily component and water with an emulsifier or dispersant to prepare an emulsion, and mixing the above-mentioned emulsion with a water-absorbing polymer to make the emulsion The water-containing polymer is absorbed in the water-absorbing polymer, and the water-absorbing polymer that has absorbed water is dispersed in the oily component. A method for improving the water absorption of a surface of an object to be treated includes the steps of applying the surface treatment composition of claim 1 to the surface of the object to be treated to increase the water absorption of the surface. A method for inhibiting water evapotranspiration is to apply a surface treatment composition as claimed in claim 1 to the surface of a to-be-processed object to suppress water evapotranspiration from the surface. A method for removing a surface treatment composition, which comprises washing the surface of the object to be treated with the surface treatment composition as described in claim 1, and removing the surface treatment composition from the object to be treated. The surface is removed.