MXPA00011115A - Water/oil repellant composition - Google Patents

Abstract

The object is to provide a water/oil repellent composition which can simultaneously perform a water/oil treatment and a polishing treatment to leather products such as leather shoes, etc., by using one water/oil repellent composition, and can also exert excellent water/oil repellent effect and excellent polishing effect. It is constituted so that microcapsules, in which a polishing agent is encapsulated, are dispersed in a water/oil repellent agent.

Description

WATER / OIL REPELLENT COMPOSITION DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water / oil repellent composition, more particularly to a water / oil repellent composition containing microcapsules, in which a polishing or polishing agent is encapsulated. When the water / oil repellent composition of the present invention is used in a treatment for waterproofing skin products such as leather etc ... a water / oil repellent agent can penetrate the skin to exert water repellency and repellency to oil. Further, when the skin surface is polished using a dry cloth after the penetration of the water / oil repellent agent and dried further, an excellent luster or gloss, ie a polishing effect, can be obtained.

PREVIOUS ART To impart water repellency and oil repellency to skin products, until now Ref. No .: 125032 a method has generally been used that consists of dissolving in a solvent, a water / oil repellent component such as a fluororesin , etc. applying the resulting on the skin or leather, following a drying to evaporate the solvent. Various compositions have been suggested for the purpose of further improving the resulting water and oil repellencies in such a water / oil repellent composition. For example, in Japanese Patent Publication No. 2516889, the present applicant has suggested a composition for the treatment of leather or skin, a woven fabric and a cellulose material to impart a high water / oil repellency to these materials, which comprises (i) a fluorochemical compound represented by the formula: RF-QA [wherein Rf represents a fluoroaliphatic portion, A represents an aliphatic portion and Q represents an organic group] and (ii) a carrier. When this water / oil-repellent composition is used in the treatment of leather or skin, not only is durable water / oil repellency imparted, but also such an effect can be obtained with no adverse effect on appearance, feel, feel, handle it, or in other desirable qualities on the skin or leather. To exert the effect of polishing on leather products such as leather shoes, etc., various polishing or polishing agents such as solid waxes, pastes, emulsions, etc., have been suggested to date. In the case of all conventional polishing agents, the polishing effect is obtained by directly applying these (the agents) on the surface of the skin and polishing it using a dry cloth. Additionally, a method used exclusively to simultaneously exert the water / oil repellency effect and the polishing effect on the skin products, includes a method for using a two component composition, i.e. a method for first applying a repellent agent. to water / solvent oil, dry and clean using a cloth, and then applying a polishing or polishing agent and polishing using a dry cloth. In this method, a two-step operation is essential and long hours of work are required. Therefore, it is desired to offer a water / oil repellent agent product that can be treated in a single step. As well as the water / oil repellent agent product that can be treated in a single step, a product obtained by adding silicone directly to the water / oil repellent composition has been placed on the market. However, sufficient effect can not be obtained, in view of the fact that a further improvement is desired and in the polishing effect. An object of the present invention is to solve the problems of the prior art mentioned above, and to offer a water / oil repellent composition with which a water / oil repellency treatment and a polishing treatment can simultaneously be carried out. such skin or leather shoes etc., using a water / oil repellent composition, and that can also exert an excellent water / oil repellency effect as well as an excellent polishing effect without requiring much time to be spent on treatment. The present inventors have made intensive studies to achieve such aforementioned objective. As a result, the present inventors have found that the expected effect can be obtained by dispersing microcapsules, in which a polishing or polishing agent is encapsulated, in a water / oil repellent agent which is in a water repellent composition. oil that contains the water / oil repellent agent as the main component. As described above, the water / oil repellent composition of the present invention contains a water / oil repellent agent as the main component, particularly characterized in that the microcapsules, in which a polishing agent is encapsulated, are uniformly dispersed in the water / oil repellent agent. In the present invention, since the encapsulated polishing agent is dispersed in the water / oil repellent agent, it is possible to avoid the following disadvantages caused by directly dispersing the polishing agent in the water / oil repellent agent. That is, when the water / oil repellent agent penetrates through the skin, simultaneously, the polishing agent penetrates through the skin, and it becomes impossible to apply a sufficient amount of polishing agent on the surface of the skin. . According to this, the polishing effect can not be expected. And in addition, the polishing agent that penetrates through the skin, along with the water / oil repellent agent, inhibits water / oil repellency. On the other hand, when the amount of the polishing agent in the aggregate composition is increased, phase separation occurs. When the phase separation has occurred, it becomes impossible, for a longer time, to apply the composition uniformly to the skin products. Accordingly, the microcapsules, in which the polishing agent is encapsulated, used in the water / oil repellent composition according to the present invention, are not specifically limited as far as the above disadvantages are avoided. That is, the microcapsules that encapsulate the polishing agent are not specifically limited as far as, or that the polishing agent encapsulated in the microcapsules is not diluted in a solvent contained in the water / oil repellent composition, and a protective film of the Microcapsules are stable in the solvent. For example, the protective film constituting the microcapsules is preferably a film of a polycondensate formed by polymerization, more preferably a film of a polycondensate such as an aminoplast resin, etc. Among these films, a urea-formaldehyde condensate can advantageously be used. The microcapsules that encapsulate the polishing agent can be formed using a publicly known encapsulation technique. The polishing agent to be encapsulated in the microcapsules includes normal polishing agents, and is not specifically limited to the polishing effect being exerted. Considering the encapsulation process, it is necessary that the polishing agent be soluble in oil. Preferred examples thereof include paraffin wax, silicone oil, wax, natural oils and fats, but are not limited thereto. Such a polishing agent is usually used in an amount of 50 to 99% by weight, based on the total weight of the microcapsules. The shape and size of the microcapsules can vary widely, but the spherical shape is preferred. The size, particularly the diameter (outer diameter of the protective film) is normally within the range from 50 to 2500 microns, preferably from 100 to 1500 microns. When the size of the microcapsules is too large, the microcapsules are separated or broken only by applying a small pressure and the content goes out inadvertently. On the other hand, when the size is too small, the strength or strength of the film is too great and, therefore, the contents can not come out by applying only moderate pressure. When the size of the microcapsules is too large or too small, a uniform dispersion of the microcapsules can not be realized. The microcapsules that encapsulate the polishing agent are used in the water / oil repellent composition in an amount that satisfies the amount of the polishing agent, required in a single application of the water / oil repellent composition, or which assures to apply a Desirable amount of polishing agent on skin products. Furthermore, according to the knowledge of the present inventors, the water / oil repellent agent used as the main component preferably is thickened so that a uniform dispersion of the microcapsules in the water / oil repellent composition is obtained. Examples of suitable means for thickening include the use of dispersing agents such as thickeners, etc., in combination. Examples of a suitable thickness include a polymeric compound, which is soluble in the solvent or can be expanded in the solvent, and a compound that can form a pseudo-network by ionic bonding, for example, a mixture of a polyvalent metal and a alkyl acid phosphate, but it is not limited to this. The water / oil repellent agent, in which the microcapsules which encapsulate the polishing agent are dispersed, is not specifically limited to the fact that the water / oil repellent agent can be dissolved in the solvent and does not cause an adverse effect as is the discoloration, etc., when applied to skin or leather; in addition, sufficient water / oil repellency can be imparted. Examples of suitable water / oil repellent agents include an acrylic copolymer containing fluorine, a product of the reaction of the fluorine-containing alcohol and a fatty acid, a multimer of perfluoroethylene oxide, etc. Such a water / oil repellent agent is normally used in the dissolved state in an organic solvent. Examples of an appropriate organic solvent include chlorinated hydrocarbons such as tetrachloroethane, trichloroethane, etc., hydrocarbon solvents such as isoparaffin hydrocarbon, etc., alcohols such as isopropyl alcohol, etc., ketones such as ethyl methyl ketone, etc. . ', or a mixture thereof. If necessary, the water / oil repellent composition of the present invention may contain commonly used additives, such as softeners, antioxidants, nutrients, perfumes, antibacterial agents, antifungal substances, deodorants, etc., coupled with the water / oil repellent agent. as the main component and the microcapsules that encapsulate the polishing agent. The amount of these additional active components and aggregate additives can vary widely according to the desired results. The water / oil repellent composition of the present invention can be applied by various methods when it is used in the treatment of skin products such as leather shoes etc. For example, a preferred method is shown below. First, the water / oil repellent composition is applied to the surface of the skin product so that the water / oil repellent component penetrates through the skin. In this application operation, an application means such as a brush or brush etc. can be used. Alternatively, preferably an application means (e.g. a sponge etc.) attached to the upper portion of a container containing the water / oil repellent composition can be used. As a result of the penetration of the water / oil repellent composition, excellent water / oil repellency can be imparted to the skin. In this phase, almost all microcapsules containing polishing agent in the water / oil repellent composition remain on the surface of the skin. Once the solvent dries or evaporates, the microcapsules containing the polishing agent that remain on the surface of the skin are separated or broken by friction or rubbing which is carried out with the help of a dry cloth to release the agent from the skin. polish encapsulated on the surface of the skin. At the same time, by rubbing the polish agent released with the same dry cloth used in the previous operation, a remarkable luster can be imparted to the surface of the skin. The present invention will be described in greater detail with reference to the following examples. It will be appreciated that the present invention is not limited to the following examples. Example 1 Preparation of the microcapsules encapsulating a polishing or polishing agent: 215 g of urea-for-aldehyde precondensate, 71 g of water and 29 g of sodium sulfate were charged into a reactor constructed of stainless steel, and the contents were they waved. Under vigorous stirring, 0.05 g of carboxylmethylcellulose was also added as a thickener. Subsequently, 104 g of silicone oil (registered trademark: "KF96-500", manufactured by the firm Shinetsu Kagaku Kogyo Co., Ltd) was added as a polishing or polishing agent. In such case, the agitation was carried out while the temperature and the speed of the mixture were accurately controlled, and subsequently, to adjust the pH of the contents to 6, an aqueous citric acid solution was added. they were separated by means of filtration, washing and additional drying As a result, microcapsules were obtained by encapsulating silicone oil, generally spherical, having an average diameter of 423 μL.Preparation of the water / oil repellent composition: As a repellent agent Water / oil, a commercially available Scotchgard ™ water / oil repellent agent (manufactured by the Minnesota Mining and Manufacturing Company of St. Paul, Minnesota) was used. This waterproofing gel contains a fluororesin, a hydrocarbon solvent, a mineral oil and a thickener as a main component. The microcapsules encapsulating silicone oil prepared in the formation step were incorporated into the waterproofing gel prepared for the skin, Scot chgard ™ in different amounts (1.0, 3.0, 5.0 and 10.0 parts by weight) as described below in Table 1, and then dispersed evenly with mixing. As a result, a clear amber gel was obtained, in which the microcapsules were uniformly dispersed. The following Table 1 shows the results obtained by visual evaluation of the stability of the formulation in this preparation step. Evaluation of the water / oil repellent composition: To evaluate the performance of the resulting water / oil repellent composition, a natural skin of beef having a smooth surface (30 cm x 30 cm) was prepared as a sample skin. By paying attention in such a way that the microcapsules did not break, the test water / oil repellent composition was applied on the smooth surface of the sample skin, and subsequently dried in the air for more than 1 hour. Once the stickiness on the surface of the sample skin disappeared, the microcapsules broke while rubbing the portion with a dry cloth. While rubbing with the cloth, the surface of the skin lightened. The degree of luster (pul iment o) varied depending on the amount of added microcapsules. In this example, a change in the polish of the skin surface was measured using a commercially available TRI-gloss polish or luster meter (trademark manufactured by the Gardener Co.). The accompanying figure 1 is a graph showing a relationship between the amount of the aggregated microcapsules and the change in the polish (increase in polish in the event that the polish on the surface of the sample skin before being treated is 100%). ). As it is obvious from this graph, it is possible to improve the polish or luster with an increase in the amount of the aggregated microcapsules.

Comparative Example 1 The procedure described in Example 1 was repeated, except that the silicone oil (registered trademark "KF96-10000", manufactured by the firm Shinetsu Kagaku Kogyo Co., Ltd.), from which a better polishing effect was expected than the of the silicone oil encapsulated in the microcapsules, was incorporated directly into a Scotchgard ™ skin waterproofing gel, and subsequently dispersed evenly with mixing for comparison. Also in this example, the amount of silicone oil added was 1.0, 3.0, 5.0 or 10.0 parts by weight. In the same manner as described in Example 1, the stability of the silicone oil formulation in this example was evaluated visually. As a result, results were obtained which are shown in Table 1 below. In the same manner as described in Example 1, a relationship was determined between the amount of silicone oil added and the change in the polish. As a result, a graph was obtained as shown in the accompanying figure 1. In this example, a high change in the polish can be obtained by adding a comparatively small amount of silicone oil by virtue of the excellent polishing effect of the silicone oil used. And in addition, the same or a better effect can be obtained by increasing the amount of the added microcapsules even in the case of Example 1.

Table 1 0: A clear amber gel forms. X: Phase separation is presented.

As described above, according to the present invention, a water / oil repellency treatment and a polishing treatment of skin products such as leather shoes, etc., can be carried out simultaneously using a water / oil repellent composition. . According to the above, not only is not so much time required for the treatment, but there is also such an effect that both the water / oil repellent effect and the polishing effect can be improved to an excellent level.

DESCRIPTION OF THE DRAWINGS Figure 1 is a graph showing a relationship between the amount of an added polishing agent and the change in luster. It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention. Having described the invention as above, property is claimed as contained in the following:

Claims (3)

1. A water / oil repellent composition comprising a water / oil repellent agent as the main component, characterized in that the microcapsules, in which a polishing agent is encapsulated, are dispersed in said water / oil repellent agent.

2. The water / oil repellent composition according to claim 1, characterized in that a protective film of said microcapsules, in which the polishing agent is encapsulated, is a film of a polycondensate formed by polymerization.

3. The water / oil repellent composition according to claim 1 6 2, characterized in that said water / oil repellent composition is thickened.