Slow-soluble components

Abstract

In a slow-dissolving composition, the aim is to achieve excellent slow-dissolving properties, resistance to cracking, and reduced adhesion to the object being washed. [Solution] Used by placing it in the lint filter or detergent dispenser of a washing machine, with a volume of 100 mm 3 The above is the basis for the product. It is preferable that the hardness be 8 to 50 kgf, and that it contains (A) an inorganic metal salt that is sparingly soluble or insoluble in water, (B) one or more selected from wax, hardened oil, sucrose fatty acid ester and cellulosic polymer, and (C) sugars.

Description

Technical Field

[0001] The present invention relates to a slowly soluble composition.

Background Art

[0002] Conventionally, tablet-shaped slowly soluble compositions have been used in toilet cisterns, on-tank or toilet cleaner compositions, drain cleaner compositions, denture cleaner compositions, and the like. For example, Patent Document 1 discloses a slime remover for a drain outlet, which contains one or more antibacterial compounds selected from ε-polylysine, triclosan, dichlosan, undecylenic acid, zinc undecylenate, phenoxyethanol, dimethyldimethylolhydantoin, and zinc gluconate.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Slowly soluble compositions are also desired in the washing of fibrous products such as clothing. The slowly soluble composition is, for example, housed in a washing ball, a washing net, etc., and put into a washing machine together with the laundry of the fibrous product for use in washing. Alternatively, the slowly soluble composition is housed in a lint filter, a detergent inlet, etc., and used for washing the laundry. However, if the slowly soluble composition is left in the lint filter or the detergent inlet that is constantly exposed to water, the slowly soluble composition is likely to crack. If the hardness of the slowly soluble composition is simply increased to prevent cracking, the solubility becomes poor. In addition, when the technology of Patent Document 1 is applied to a slowly soluble composition for a washing machine, the inorganic powder contained in the slowly soluble composition may adhere to the laundry.

[0005] Therefore, the present invention aims to provide a slow-dissolving composition that exhibits excellent slow-dissolving properties, is resistant to cracking, and reduces adhesion to objects to be washed. [Means for solving the problem]

[0006] The present invention has the following aspects. <1> It is used by placing it in the lint filter or detergent dispenser of the washing machine. Volume is 100 mm 3 The above describes a slow-dissolving composition. <2> The hardness is 8-50 kgf. <1> A slow-dissolving composition. <3> (A) Components: an inorganic metal salt that is sparingly soluble or insoluble in water, (B) Components: One or more selected from wax, hardened oil, sucrose fatty acid ester and cellulosic polymer, (C) Ingredients: Sugars and, including <1> or <2> The slow-dissolving composition described in [reference]. <4> The mass ratio expressed as (component (A) + component (B)) / component (C) is between 0.3 and 5. <3> The slow-dissolving composition described in [reference]. <5> The mass ratio expressed as component (A) / component (B) is between 0.6 and 6. <3> or <4> The slow-dissolving composition described in [reference]. <6> The aforementioned component (A) is one or more selected from synthetic hydrotalcite, magnesium aluminometasilicate, magnesium aluminosilicate, aluminum hydroxide, calcium sulfate, calcium carbonate, calcium hydrogen phosphate, and aluminum silicate. <3> ~ <5> A slow-dissolving composition as described in any of the above. <7> The aforementioned component (C) is one or more selected from mannitol, lactose, sucrose, and oligosaccharides. <3> ~ <6> A slow-dissolving composition as described in any of the above. [Effects of the Invention]

[0007] The slow-dissolving composition of the present invention exhibits excellent slow-dissolving properties, is less prone to cracking, and reduces adhesion to the object being washed. [Brief explanation of the drawing]

[0008] [Figure 1] This is a side view showing an example of the slow-dissolving composition of the present invention. [Figure 2] This is a side view showing another example of the slow-dissolving composition of the present invention. [Figure 3] (a) is a perspective view showing another example of the slow-dissolving composition of the present invention, and (b) is a cross-sectional view of the slow-dissolving composition shown in (a) along the line A-A'. [Modes for carrying out the invention]

[0009] The following describes specific embodiments of the present invention, but the present invention is not limited to the following embodiments and can be implemented with various modifications within the scope of its gist. In this specification and in the claims, a numerical range represented by "~" means a numerical range that includes the numbers before and after "~" as the lower and upper limits, respectively. For example, A~B is synonymous with A or greater and B or less. "Slow dissolution" refers to the property of a composition that, upon contact with water, does not dissolve entirely at once, but rather only the surface of the composition or a portion of its vicinity dissolves. Specifically, it means that when 12 g of the composition is immersed in 15°C water for 40 minutes and the mass of the composition is measured afterward, the decrease in mass before and after immersion is 0.2 g or more and less than 5.0 g. The slow dissolution of the slow dissolution composition of the present invention is more preferably 0.5 g or more and 2.5 g or less, and more preferably 0.8 g or more and less than 2.0 g.

[0010] (Dosage form) An example of a dosage form for a slow-dissolving composition is the so-called tablet form. "Tablet type" refers to a preparation that maintains a certain shape at room temperature (e.g., 25°C) and is less likely to undergo a change in shape over time. Examples of tablet-type sustained-release compositions (sometimes referred to as "tablet compositions") include tablets, gels, unit doses, etc.

[0011] <Shape> The shape of the sustained-release composition is not particularly limited, and examples include spherical shapes such as true spherical and ellipsoidal, and shapes having columnar parts such as cylindrical and polygonal columnar. Among them, shapes having a cylindrical part and shapes having a prismatic part are preferred.

[0012] When the sustained-release composition has a shape with a cylindrical part, the sustained-release composition may consist only of the cylindrical part, or may have a shape with a cylindrical part and bulging parts that bulge upward and downward from the cylindrical part.

[0013] When the sustained-release composition has a shape with a cylindrical part and bulging parts, examples of such a sustained-release composition include Sumitomo Square Tablets, Sumitomo Round Tablets, R Tablets (standard R Tablets), two-stage R Tablets, etc. Among these, Sumitomo Square Tablets and R Tablets are preferred. The bulging parts of these tablets may be asymmetric in the up and down direction, but are preferably symmetric in the up and down direction.

[0014] Figure 1 is a side view showing an example of a sustained-release composition 10 in the shape of Sumitomo Square Tablets. The sustained-release composition 10 in this example is a biconvex tablet having a cylindrical part 11, a first bulging part 12, and a second bulging part 13. The diameter of the cylindrical part 11 (diameter in plan view), that is, the diameter of the top and bottom surfaces of the cylindrical part 11 is preferably 6 mm or more, more preferably 6.7 to 30 mm, further preferably 7.7 to 30 mm, and particularly preferably 9 to 30 mm. If the diameter of the cylindrical part 11 is at least the above lower limit value, it is possible to prevent the composition from flowing back into the washing tub when placed in a lint filter. If the diameter of the cylindrical part 11 is at most the above upper limit value, it is possible to dissolve evenly until the end. The first bulge 12 rises linearly from near the periphery of one end face of the cylindrical portion 11 toward the center of the said end face at a predetermined rising angle θ, so that any region including the zenith 12A becomes a plane. The second bulge 13 rises linearly from near the periphery of the other end face of the cylindrical portion 11 toward the center of the other end face at a predetermined rising angle θ, so that any region including the zenith 13A becomes a plane. The rising angle θ at the first bulge 12 and the rising angle θ at the second bulge 13 may be the same or different, but from the viewpoint of tablet strength, it is preferable that they be the same. The thickness H1 of the slow-dissolving composition 10, that is, the sum of the thickness of the cylindrical portion 11 and the maximum thickness of the first bulge portion 12 and the second bulge portion 13, is preferably 3 mm or more, more preferably 3.3 to 15 mm, even more preferably 3.8 to 15 mm, and particularly preferably 4.5 to 15 mm. The slow-dissolving composition 10 shown in Figure 1 has an annular horizontal surface (land portion 14) on the outer circumference of the first bulge portion 12 in plan view, and an annular horizontal surface (land portion 15) on the outer circumference of the second bulge portion 13 in plan view. However, for example, it may not have a land portion, and the tablet periphery and the bulge rising portion may be in contact.

[0015] Figure 2 is a side view showing an example of a slow-dissolving composition 20 having the shape of an R tablet. The slow-dissolving composition 20 in this example is a biconvex tablet having a cylindrical portion 21, a first bulge portion 22, and a second bulge portion 23, wherein the radius of curvature R of the curves on the surfaces of the first bulge portion 22 and the second bulge portion 23 is constant regardless of the position on the surface of the bulge portion. The diameter of the cylindrical portion 21, that is, the diameters of the top and bottom surfaces of the cylindrical portion 21, is the same as the diameter of the cylindrical portion 11 of the slowly dissolving composition 10 shown in Figure 1. The first bulge 22 bulges out from near the periphery of one end face of the cylindrical portion 21 toward the center of that end face. The second bulge 23 bulges out from near the periphery of the other end face of the cylindrical portion 21 toward the center of that other end face. Here, "radius of curvature of the curve on the surface of the first bulge 22" refers to the radius of the circle when the curve traced by the surface of the first bulge 22 is considered as part of a circle in a cross-section obtained by cutting the cylindrical portion 21 perpendicular to the end face so as to pass through the zenith 22A. The "radius of curvature of the curve on the surface of the second bulge 23" refers to the radius of the circle when the curve traced by the surface of the second bulge 23 is considered as part of a circle in a cross-section obtained by cutting the cylindrical portion 21 perpendicular to the end face so as to pass through the zenith 23A. The zenith 22A of the first bulge 22 is the point that is highest relative to one end face. The zenith 23A of the second bulge 23 is the point that is lowest relative to the other end face. The radius of curvature R of the first bulge 22 and the radius of curvature R of the second bulge 23 may be the same or different, but from the viewpoint of tablet strength, it is preferable that they be the same. The thickness H2 of the slow-dissolving composition 20, that is, the sum of the thickness of the cylindrical portion 21 and the maximum thickness of the first bulge portion 22 and the second bulge portion 23, is preferably 3 mm or more, more preferably 3.3 to 15 mm, even more preferably 3.8 to 15 mm, and particularly preferably 4.5 to 15 mm. The slow-dissolving composition 20 shown in Figure 2 has an annular horizontal surface (land area 24) on the outer circumference of the first bulge 22 in plan view, and an annular horizontal surface (land area 25) on the outer circumference of the second bulge 23 in plan view. However, for example, it may not have a land area, and the tablet periphery and the bulge rising portion may be in contact.

[0016] If the slow-dissolving composition has a shape consisting only of a cylindrical portion, the diameter of the cylindrical portion is the same as the diameter of the cylindrical portion 11 of the slow-dissolving composition 10 shown in Figure 1. Furthermore, the height of the cylindrical portion, that is, the thickness of the slow-dissolving composition consisting only of the cylindrical portion, is preferably 3 mm or more, more preferably 3.3 to 15 mm, even more preferably 3.8 to 15 mm, and particularly preferably 4.5 to 15 mm. A slow-dissolving composition consisting only of a cylindrical portion may be flattened. In the case of a flattened shape, the aspect ratio (diameter of the cylindrical portion / height H of the cylindrical portion) is preferably 1 to 10, more preferably 1.2 to 5, and even more preferably 1.5 to 2.5.

[0017] Furthermore, if the slow-dissolving composition has a shape consisting only of a cylindrical portion, a recess may be provided on the surface of the cylindrical portion, specifically at least one of the top and bottom surfaces of the cylindrical portion. Figure 3(a) is a perspective view showing an example of a slow-dissolving composition 30 having a shape with recesses on its surface, and Figure 3(b) is a cross-sectional view of the slow-dissolving composition 30 along the line A-A'. The slow-dissolving composition 30 shown in Figure 3 consists only of a cylindrical portion 31, with a recess 32 provided in the center of the top surface 31a of the cylindrical portion 31. Furthermore, the cross-sectional shape of the slow-dissolving composition 30 along the thickness H3 direction is rectangular, and its four corners are cut off by circular arcs. In the illustrated example, the slow-dissolving composition 30 has a flat top and bottom surface, but at least one of the top and bottom surfaces may be curved.

[0018] The diameter of the cylindrical portion 31, that is, the diameters of the top surface 31a and the bottom surface 31b, is preferably 6 mm or more, more preferably 6.7 to 30 mm, even more preferably 7.7 to 30 mm, and particularly preferably 9 to 30 mm. If the diameters of the top surface 31a and the bottom surface 31b are greater than or equal to the lower limit, it is possible to better prevent the composition from flowing back into the washing tub when placed in the lint filter. If the diameters of the top surface 31a and the bottom surface 31b are less than or equal to the upper limit, it is possible to dissolve the composition uniformly until the end.

[0019] The thickness H3 of the slowly dissolving composition 30, that is, the thickness of the cylindrical portion 31, is not particularly limited, but for example, it is preferably 3 mm or more, more preferably 3.3 to 15 mm, even more preferably 3.8 to 15 mm, and particularly preferably 4.5 to 15 mm.

[0020] The depth h of the recess 32 is preferably 20-40% of the thickness H3 of the slow-dissolving composition 30, and more preferably 25-35%. If the depth h of the recess 32 is greater than or equal to the lower limit, the hardness of the slow-dissolving composition 30 will be higher. If the depth h of the recess 32 is less than or equal to the upper limit, tablet molding can be easily performed. The diameter d of the opening of the recess 32 is preferably 2 mm or more, more preferably 3 to 25 mm, and even more preferably 4.5 to 20 mm. In the illustrated example, the shape of the opening of the recess 32 is circular, but the shape of the opening of the recess 32 is not particularly limited and may be polygonal or elliptical. The volume of the recess 32 is preferably 5 to 25% of the volume of the slow-dissolving composition 30, and more preferably 10 to 20%. If the volume of the recess 32 is above the lower limit, the slow-dissolving properties of the slow-dissolving composition 30 are further improved. If the volume of the recess 32 is below the upper limit, the hardness of the slow-dissolving composition 30 is further increased. The recess 32 may be formed in a spiral shape toward its center.

[0021] If the slow-dissolving composition has a prismatic shape, the slow-dissolving composition may consist only of the prismatic shape, or it may have a prismatic shape and bulging parts that protrude above and below the prismatic shape. Furthermore, if the slow-dissolving composition has a shape consisting only of a prismatic portion, a recess may be provided on the surface of the prismatic portion, specifically at least one of the top and bottom surfaces of the prismatic portion.

[0022] An example of a slow-dissolving composition having a prismatic portion is a slow-dissolving composition having a cylindrical portion, in which the cylindrical portion is replaced with a prismatic portion. The diameter of the circumscribed circle of the top or bottom surface of the prism is preferably 6 mm or more, more preferably 6.7 to 30 mm, even more preferably 7.7 to 30 mm, and particularly preferably 9 to 30 mm. If the diameter of the circumscribed circle of the top or bottom surface of the prism is greater than or equal to the lower limit above, it is possible to better prevent the composition from flowing back into the washing tub when placed in the lint filter. If the diameter of the circumscribed circle of the top or bottom surface of the prism is less than or equal to the upper limit above, it is possible to dissolve it uniformly until the end. The shape of the top or bottom surface of the prism is not particularly limited as long as it is a polygon, but examples include triangles, quadrilaterals, pentagons, hexagons, heptagons, octagons, star polygons, etc.

[0023] As for the shape of the slow-dissolving composition, a cylindrical shape is preferred, and from the viewpoint of increasing the hardness of the slow-dissolving composition, a shape having a cylindrical shape and a bulging part, a shape in which a recess is provided on at least one of the top and bottom surfaces of the cylindrical part is more preferred, a square-shaped tablet, a shape in which a recess is provided on at least one of the top and bottom surfaces of the cylindrical part is even more preferred, and a shape in which a recess is provided on at least one of the top and bottom surfaces of the cylindrical part is particularly preferred.

[0024] ≪Volume≫ The volume of the slowly soluble composition is 100 mm 3 The above is preferable, and 120 to 50000 mm 3 More preferably, 180-30000mm 3 More preferably, 300-10000mm 3 This is particularly preferable. If the volume is above the lower limit, it can prevent cracking when placed in the lint filter or detergent dispenser and used for washing, and prevent the slow-dissolving composition from flowing into the washing tub. If the volume is below the upper limit, it can be easily placed in the lint filter or detergent dispenser.

[0025] <Mass> The mass of one formulation of the slow-dissolving composition is preferably 1.5 g or more, more preferably 2 to 60 g, and even more preferably 10 to 20 g. If the mass of one formulation is above the lower limit, it is possible to better prevent the composition from flowing back into the washing tub when placed in the lint filter. If the mass of one formulation is below the upper limit, the hardness of the slow-dissolving composition will be higher.

[0026] <Hardness> When the slow-dissolving composition is in tablet form, the hardness of the slow-dissolving composition is preferably 8 to 50 kgf (98 to 588 N), more preferably 20 to 50 kgf (196 to 539 N), and even more preferably 30 to 50 kgf (294 to 539 N). If the hardness is above the lower limit, cracking of the slow-dissolving composition can be better prevented. If the hardness is below the upper limit, the slow-dissolving properties can be further enhanced.

[0027] (composition) The slow-dissolving composition of the present invention is a tablet-type solid dosage form comprising component (A), component (B), and component (C). The slow-dissolving composition may, if necessary, further contain components other than components (A), (B), and (C) (hereinafter also referred to as "optional components") in addition to components (A), (B), and (C), as long as it does not impair the effects of the present invention.

[0028] <(A) component> Component (A) is an inorganic metal salt that is sparingly soluble or insoluble in water. That is, component (A) is one or more selected from water-spaciously soluble inorganic metal salts and water-insoluble inorganic metal salts. The slow-dissolving composition exhibits slow-dissolving properties by containing component (A). "Slightly soluble in water" refers to a general term for components that require 100 mL or more but less than 10,000 mL of water to dissolve 1 gram of the component. "Insoluble in water" refers to a general term for components that require 10,000 mL or more of water to dissolve 1 gram of the component.

[0029] (A) Component may include an inorganic metal salt containing one or more selected from magnesium, aluminum, and calcium. Examples of such (A) component include synthetic hydrotalcite, aluminum silicate, magnesium aluminometasilicate, magnesium aluminometasilicate, aluminum hydroxide, magnesium hydroxide, aluminum magnesium hydroxide, magnesium silicate, magnesium carbonate, magnesium oxide, aluminum oxide, calcium sulfate, calcium carbonate, calcium hydrogen phosphate, etc. Among these, synthetic hydrotalcite, magnesium aluminometasilicate, magnesium aluminometasilicate, aluminum hydroxide, calcium sulfate, calcium carbonate, calcium hydrogen phosphate, and aluminum silicate are preferred from the viewpoint of improving the hardness of the tablet composition and preventing undissolved residue from adhering to textile products after washing. (A) Component may be used alone or in combination of two or more types. Aluminum hydroxide may be crystalline or amorphous. Amorphous aluminum hydroxide is also called "dried aluminum hydroxide gel." (A) The content of component (A) is preferably 20 to 70% by mass, more preferably 30 to 65% by mass, and even more preferably 40 to 60% by mass, relative to the total mass of the slow-dissolving composition. If the content of component (A) is above the lower limit, the slow-dissolving properties can be further enhanced. If the content of component (A) is below the upper limit, the hardness of the slow-dissolving composition of the tablets can be increased, and the amount of residue adhering to the object being washed can be further reduced.

[0030] <(B) component> Component (B) is one or more selected from wax, hydrogenated oil, sucrose fatty acid ester, and cellulosic polymer. By including component (B), the slow-dissolving composition can increase the hardness of the tablet and further reduce adhesion to the object being washed.

[0031] Examples of waxes include carnauba wax, rice wax, sunflower wax, candelilla wax, and rose wax. As for carnauba wax, known types can be used, such as natural crude wax purified by methods such as degumming, deacidification, hydrogenation, fractionation, and column treatment, or unpurified wax. As for the rice wax, any known type can be used, for example, one that is separated during the refining of rice oil extracted from rice bran. As for sunflower wax, any known type can be used, such as one obtained from sunflower seeds. As for rose wax, any known type can be used, such as one obtained from rose blossoms. As for candelilla wax, known types can be used, such as those obtained from the stems of the candelilla plant.

[0032] As the hardened oil, known types can be used, such as hardened castor oil, hardened palm oil, hardened rice oil, hardened coconut oil, and hardened soybean oil.

[0033] As sucrose fatty acid esters, known types can be used, such as sucrose oleate, sucrose caprylate, sucrose capric acid, sucrose laurate, sucrose stearate, sucrose palmitate, and sucrose myristic acid.

[0034] Examples of cellulose polymers include hydroxypropylcellulose, hydroxyethylcellulose, hydroxypropylmethylcellulose, carboxymethylcellulose, methylcellulose, and cellulose acetate phthalate. The weight-average molecular weight of the cellulose polymer is preferably 10,000 to 3,000,000, and more preferably 100,000 to 1,000,000.

[0035] These (B) components may be a single type or a combination of two or more types.

[0036] (B) The content of component (B) is preferably 5 to 40% by mass, more preferably 10 to 35% by mass, and even more preferably 15 to 30% by mass, relative to the total mass of the slow-dissolving composition. If the content of component (B) is above the lower limit, tableting properties can be improved and productivity can be further increased. If the content of component (B) is below the upper limit, hardness can be further increased.

[0037] The composition is expressed as (A) component / (B) component, and the mass ratio of component (A) to component (B) (A / B ratio) is preferably 0.6 to 6, more preferably 0.8 to 4.5, and even more preferably 1 to 3. If the A / B ratio is above the lower limit, cracking of the slow-dissolving composition can be further suppressed. If the A / B ratio is below the upper limit, the dissolution rate can be moderately increased, further enhancing the slow-dissolving properties.

[0038] <(C) component> Component (C) is a sugar. The slow-dissolving composition, by containing component (C), exhibits excellent slow-dissolving properties, has appropriate hardness, and can reduce adhesion to the object being washed.

[0039] (C) Water-soluble sugars are preferred as component (C). (C) In the context of component (C), "water-soluble" means that the solubility in deionized water is 10 g / 100 mL or more. The solubility of component (C) is preferably 10 to 100 g / 100 mL, and more preferably 15 to 80 g / 100 mL.

[0040] (C) Examples of components include monosaccharides, disaccharides, oligosaccharides, and starch. The monosaccharide can be an aldose, a ketose, or a derivative thereof. Examples of aldoses include xylose, glucose, mannose, and galactose. Examples of aldose derivatives include so-called sugar alcohols such as xylitol and mannitol. Examples of ketoses include fructose. Examples of disaccharides include sucrose, lactose, maltose, and trehalose. Oligosaccharides are, for example, trisaccharides to decasaccharides. Examples of oligosaccharides include fructooligosaccharides and galactooligosaccharides. (C) As for component (C), monosaccharides, disaccharides, and oligosaccharides are preferred from the viewpoint of reducing deposits on the object to be washed, and oligosaccharides such as mannitol, lactose, sucrose, fructooligosaccharides, and galactooligosaccharides are preferred. These sugars may or may not be in granular form. Sugars can be used individually or in combination of two or more types.

[0041] The content of component (C) is preferably 10 to 60% by mass, more preferably 15 to 50% by mass, and even more preferably 20 to 40% by mass, relative to the total mass of the slow-dissolving composition. If the content of component (C) is above the lower limit, the amount of material adhering to the object being washed can be further reduced. If the content of component (C) is below the upper limit, the slow-dissolving properties can be further enhanced.

[0042] The total content of components (A), (B), and (C) (ABC amount) is preferably 10 to 100% by mass, more preferably 40 to 100% by mass, even more preferably 50 to 90% by mass, and particularly preferably 65 to 80% by mass, relative to the total mass of the slow-dissolving composition. If the ABC amount is within the above range, the slow-dissolving properties and hardness of the slow-dissolving composition can be made more appropriate, and the amount of residue adhering to the object to be washed can be further reduced.

[0043] The compound is expressed as (component (A) + component (B)) / component (C), and the mass ratio of the total amount of components (A) and (B) (AB amount) to component (C) (AB / C ratio) is preferably 0.3 to 5, more preferably 0.4 to 4, and even more preferably 0.5 to 3. If the AB / C ratio is above the lower limit, the dissolution rate can be slowed down to make slow dissolution more appropriate, cracking can be further suppressed, and adhesion to the object to be washed can be further reduced. If the AB / C ratio is below the upper limit, the dissolution rate can be accelerated to make slow dissolution more appropriate.

[0044] The mass ratio (A / C ratio) of component (A) / component (C) is 0.5 to 3.0, preferably 0.7 to 2.8, more preferably 1.0 to 2.5, and even more preferably 1.5 to 2.0. If the A / C ratio is above the lower limit, the hardness of the slow-dissolving composition increases, making it less prone to cracking. This prevents the slow-dissolving composition from cracking during washing and small pieces from flying out of the lint filter or detergent dispenser. If the A / C ratio is below the upper limit, the slow-dissolving composition dissolves moderately easily when it comes into contact with water, improving its slow-dissolving properties.

[0045] <Optional ingredients> Optional ingredients include, for example, lubricants (excluding component (B)), microbial inhibitors such as disinfectants, sterilizers, antibacterial agents, fungicides or antifungal agents, deodorizers, repellents, ultraviolet absorbers, fluorescent agents, color transfer inhibitors, fiber surface modifiers, re-soiling inhibitors, metal ion scavengers (chelating agents), fragrances, colorants, organic acids, etc. These optional components are known substances, readily available on the market, and can also be prepared. The optional components may be a single type or a combination of two or more types. Furthermore, the total amount of all components constituting the slow-dissolving composition is 100% by mass and does not exceed 100% by mass.

[0046] Examples of lubricants include magnesium stearate, calcium stearate, sodium stearyl fumarate, light anhydrous silicic acid, hydrated silicon dioxide, talc, and sodium lauryl sulfate. The lubricant may be used individually or in combination of two or more types.

[0047] Examples of antibacterial agents include alkyltrimethylammonium salts with 12 to 16 carbon atoms (product names such as "Lipocard C12-37W," "Lipocard C50," "Lipocard C16Cl salt," and "Lipocard C16MS salt" from Lion Specialty Chemicals Co., Ltd.), dialkyldimethylammonium salts (product names such as "Lipocard 210-80E" from Lion Specialty Chemicals Co., Ltd. and "CarboquatMW50" from Lonza Co., Ltd.), and dialkylmethylpolyammonium salts. Examples include lopionate (product name "Bardap26" manufactured by Lonza Corporation, etc.), diclosan (product name "Chinosan HP100" manufactured by BASF, etc.), triclosan, benzalkonium chloride (product names "BarquatMS100" and "BarquatMB80" manufactured by Lonza Corporation, etc.), benzethonium chloride, bis-(2-pyridylthio-1-oxide)zinc, 8-oxyquinoline, biguanide compounds (product name "ProxelIB" manufactured by Lonza Corporation, etc.), chlorohexidine hydrochloride, polylysine, etc. The amount of antibacterial agent is not particularly limited as long as it is sufficient to achieve the intended purpose of the formulation, but it is preferably less than 10% by mass relative to the total mass of the slow-dissolving composition.

[0048] Examples of antifungal agents include Yotol DP95 (compound name: diiodomethyl-p-tolylsulfone) and iodide propynyl butylcarbamate. Examples of deodorants include methylglycine diacetic acid (MGDA), aspartate diacetic acid (ASDA), isoserine diacetic acid (ISDA), β-alanine diacetic acid (ADAA), serine diacetic acid (SDA), glutamate diacetic acid (GLDA), iminodisuccinic acid (IDS), hydroxyiminodisuccinic acid (HIDS), or salts thereof, zinc ricinoleate, bentonite, dextrin, etc. Examples of repellents include known components used in known insect repellents, such as N,N-diethyl-3-methylbenzamide (DEET) and picaridin. Examples of UV absorbers include 4-methoxy-4'-tert-butyldibenzoylmethane (such as "Parsol 1789," a product of DSM Nutrition Japan Co., Ltd.).

[0049] Examples of fluorescent agents include 4,4-bis(2-sulfostyryl)biphenyldisodium (such as "Chinopar CBS-X" manufactured by BASF). Examples of substrates that prevent color transfer include polyvinylpyrrolidone. Examples of colorfastness inhibitors include 1,4-bis(3-aminopropyl)piperazine. Examples of fiber surface modifiers include enzymes such as cellulase, amylase, protease, lipase, and keratinase. Examples of anti-redeposition agents include water-soluble polymers having at least one repeating unit selected from the group consisting of alkylene terephthalate units and alkylene isophthalate units, and at least one repeating unit selected from the group consisting of oxyalkylene units and polyoxyalkylene units. Specifically, examples include the trade names "TexCare SRN-100" (manufactured by Clariant, weight-average molecular weight 2000-3000), "TexCare SRN-300" (manufactured by Clariant, weight-average molecular weight 7000), "Repel-O-Tex Crystal" (manufactured by Rhodia), and "Repel-O-Tex QC" (manufactured by Rhodia). Other anti-redeposition agents include alkylene oxide adducts of polyalkyleneimines and alkylene oxide adducts of polyalkyleneamines. Specifically, examples include the trade name "Sokalan HP20" (manufactured by BASF). Examples of metal ion scavenging agents (chelating agents) include malonic acid, succinic acid, malic acid, diglycolic acid, tartaric acid, citric acid, and fumaric acid.

[0050] As for fragrances, those known to be usable in treatment agent compositions for textile products can be used without particular restrictions. For example, lists of usable fragrance raw materials are found in various publications, such as "Perfume and Flavor Chemicals", Vol. I and II, Steffen Arctander, Allured Pub. Co. (1994), "Synthetic Fragrances: Chemistry and Product Knowledge", by Motoichi Indo, Chemical Daily Co. (1996), "Perfume and Flavor Materials of Natural Origin", Steffen Arctander, Allured Pub. Co. (1994), "Encyclopedia of Fragrances", edited by the Japan Fragrance Association, Asakura Shoten (1989), "Perfumery Material Performance V.3.3", Boelens Aroma Chemical Information Service (1996), and "Flower oils and Floral Compounds In Perfumery", Danute Lajaujis Anonis, Allured Pub. Co. (1993). The amount of fragrance added is not particularly limited as long as it is sufficient to achieve the intended purpose, but it is preferably less than 10% by mass of the total mass of the slow-dissolving composition.

[0051] Examples of fiber surface modifiers include silicone compounds. The molecular structure of the silicone compound may be linear, branched, or crosslinked. The silicone compound may also be a modified silicone compound, and the modified silicone compound may be modified with one organic functional group or with two or more organic functional groups. Silicone compounds can be used in oil form, or in emulsion form dispersed with any emulsifier. Specific examples of silicones include dimethyl silicone, polyether-modified silicone, methylphenyl silicone, alkyl-modified silicone, higher fatty acid-modified silicone, methyl hydrogen silicone, fluorine-modified silicone, epoxy-modified silicone, carboxy-modified silicone, carbinol-modified silicone, and amino-modified silicone. For example, polyoxyethylene-modified silicone (such as the product name "SH3775M" manufactured by DuPont Toray Specialty Materials Co., Ltd.) is one example. The silicone content is not particularly limited as long as it is sufficient to achieve the formulation objective, but it is preferably less than 10% by mass relative to the total mass of the slow-dissolving composition.

[0052] Examples of colorants include general-purpose dyes and pigments such as Acid Red 138, Polar Red RLS, Acid Yellow 203, Acid Blue 9, Blue No. 1, Blue No. 205, Green No. 3, Red No. 106, Yellow No. 203, and Turquoise P-GR (all are trade names). The amount of colorant is not particularly limited as long as it is sufficient to achieve the intended purpose of the formulation, but it is preferably 0.00005 to 0.005% by mass relative to the total mass of the slow-dissolving composition.

[0053] Examples of organic acids include succinic acid, fumaric acid, malic acid, adipic acid, tartaric acid, benzoic acid, citric acid, pyrrolidone carboxylic acid, salicylic acid, maleic acid, phthalic acid, glutaric acid, and oxalic acid.

[0054] (Manufacturing method) A slow-dissolving composition can be used to obtain tablets by compressing a mixture (powder mixture) obtained by mixing component (A), component (B), component (C), and one or more optional components as needed. One method of tablet production is to use a tablet press equipped with a die and a punch to perform tableting (compression molding). The tableting conditions are not particularly limited, but the tableting pressure is preferably 20 to 100 kN, and more preferably 40 to 60 kN.

[0055] Alternatively, a gel-like slow-dissolving composition can be obtained by adding component (A), component (B), component (C), a gelling agent, and other optional components as needed to water, heating it to form an aqueous solution, and then cooling this aqueous solution.

[0056] (Application) The slow-dissolving composition of the present invention can be used together with the items to be washed during washing in a washing machine or washing dishes in a dishwasher. In other words, the slow-dissolving composition is preferably used for washing or dishwashing, and more preferably for washing. In the case of laundry processing, examples of items to be washed include clothing, dishcloths, towels, sheets, curtains, and other textile products. The material of the textile products is not particularly limited and may be any of the following: natural fibers such as cotton, silk, and wool, or synthetic fibers such as polyester and polyamide. In the case of dishwashing, examples of items to be washed include plates, chopsticks, spoons and other utensils used directly for eating; and cooking utensils such as pots and knives. In this specification, these are collectively referred to as "dishes."

[0057] Furthermore, if the slow-dissolving composition of the present invention contains functional components other than component (A) in addition to components (A) to (C), each time it comes into contact with water, a portion of the surface or its vicinity of the slow-dissolving composition dissolves, and the functional components are released along with components (A) to (C) contained in the slow-dissolving composition, allowing the effects of the functional components to be exerted continuously. Examples of functional ingredients include the optional ingredients mentioned above. For instance, if antibacterial agents, antifungal agents, deodorizers, etc., are added to the slow-dissolving composition, these functions will be imparted not only to the items being washed but also to the interior of the washing machine or dishwasher.

[0058] (How to use) The slow-dissolving composition of the present invention can be used as is, or after being contained in a container, utensil, or bag. For example, when using the slow-dissolving composition of the present invention for laundry processing, one method is to first place the slow-dissolving composition directly into the lint filter or detergent dispenser, then pour water into the washing tub and perform the laundry. In both the lint filter and the detergent dispenser, which are constantly exposed to water, the slow-dissolving composition of the present invention does not easily crack and exhibits excellent slow-dissolving properties. Alternatively, the slow-dissolving composition may be placed inside commercially available laundry items such as laundry balls or laundry nets, and these may be placed in a washing machine together with the clothes to be washed. As a laundry ball, for example, the outer container portion of the "Eco Laundry Ball" manufactured by Ihara Kikaku Co., Ltd., from which the tourmaline contents have been removed, can be used. As a laundry net, for example, the "Umi. Laundry Net" manufactured by Diyouth can be used. These laundry items can be reused by separately filling them with the slow-dissolving composition of the present invention if all or almost all of the slow-dissolving composition of the present invention has dissolved during washing. Laundry items such as laundry balls or laundry nets containing the slow-dissolving composition of the present invention may be placed in the washing machine beforehand, or placed on top of the laundry after it has been placed in the machine. They may remain in the washing machine throughout all stages of the process, including filling with water, washing, draining, rinsing, spinning, and (depending on the washing machine) drying. After the washing is finished and the laundry is removed from the washing machine, the laundry items such as laundry balls or laundry nets containing the slow-dissolving composition of the present invention may be left in the washing machine and can be used as is for the next wash. When the slow-dissolving composition of the present invention is used for dishwashing, it can be used in the same manner as when it is used for laundry.

[0059] As described above, the slow-dissolving composition of the present invention is preferably used for laundry or dishwashing, more preferably for laundry, and even more preferably when placed in the lint filter or detergent dispenser of a washing machine. [Examples]

[0060] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to the following description. In these examples, "%" refers to "mass%" unless otherwise specified.

[0061] (Raw materials used) <(A) component> A-1: Magnesium aluminometasilicate (manufactured by Fuji Chemical Industry Co., Ltd.). A-2: Calcium sulfate 0.5 hydrate (manufactured by Taihei Chemical Industry Co., Ltd.).

[0062] <(B) component> B1-1: Carnauba wax (product name "TOWAX-17F", manufactured by Toa Chemical Co., Ltd.). B1-2: Hydroxypropylcellulose (HPC, trade name "HPC-L", manufactured by Nippon Soda Co., Ltd.).

[0063] <(C) component> C-1: Mannitol (product name "Grannutol F", manufactured by Megre Japan Co., Ltd.). • C-2: Lactose (product name "Lactose G", manufactured by Freund Industrial Co., Ltd.).

[0064] <Optional ingredients> • Fragrance: Free fragrance composition D-1 as described in paragraph 0075 of Japanese Patent Publication No. 2021-4418.

[0065] (Measurement method) <Hardness> Using a compressive strength measuring instrument (manufactured by Imada Co., Ltd., product name "Digital Force Gauge DST-200N"), the maximum pressure at which one tablet of each slow-dissolving composition was fractured was measured, and this was defined as the hardness.

[0066] (Evaluation method) <Slowly soluble> For each example, the slow-dissolving composition was placed in the designated location in the table of a drum-type washing machine (manufactured by Panasonic Holdings Corporation, product name "NA-VX7600L") (in the example marked "laundry net," the slow-dissolving composition was placed in a laundry net and then placed in the washing tub). 4 kg of clothing was added to the washing tub, and the machine was washed for approximately 40 minutes on a standard cycle (from filling to spinning, at a water temperature of 15°C). The amount of slow-dissolving composition dissolved (weight loss of the slow-dissolving composition before and after washing) was measured, and the average result of 10 measurements was evaluated according to the evaluation criteria below.

[0067] ≪Evaluation Criteria≫ ◎: Average slow dissolution rate is 0.7g or more and 1.3g or less. ○: Average slow dissolution rate is 0.3g or more but less than 0.7g, or greater than 1.3g and 1.7g or less. △: Average slow dissolution rate is 0.1g or more but less than 0.3g, or more than 1.7g and 2.0g or less. ×: Average slow dissolution rate is less than 0.1g or greater than 2.0g.

[0068] <Crack resistance> For each example, the slow-dissolving composition was placed in the designated location in the table of a drum-type washing machine (manufactured by Panasonic Holdings Corporation, product name "NA-VX7600L") (in the example marked "laundry net," the slow-dissolving composition was placed in a laundry net and then placed in the washing tub). 4 kg of clothing was added to the washing tub, and the machine was washed on a standard course (from filling to spinning, at a water temperature of 15°C) for approximately 40 minutes. Afterwards, the cracking and chipping of the surface of the slow-dissolving composition was visually observed and evaluated according to the evaluation criteria below.

[0069] ≪Evaluation Criteria≫ ◎: No cracks or chips. ○: Slight cracks and chips are visible. △: Cracks and chips are somewhat noticeable, but not problematic. ×: Cracks can cause the tablet composition to break or chip, or it may fly out of the lint filter.

[0070] <Adhesion (suppression of adhesion to the object being washed)> For each example, the slow-dissolving composition was placed in the designated location in the table of a drum-type washing machine (manufactured by Panasonic Holdings Corporation, product name "NA-VX7600L") (in the example marked "laundry net," the slow-dissolving composition was placed in a laundry net and then placed in the washing tub). 4 kg of clothing was added to the washing tub, and the machine was washed on a standard course (from filling to spinning, at a water temperature of 15°C) for approximately 40 minutes. After washing, the amount of "powder" adhering to the clothing was visually observed and evaluated according to the following evaluation criteria.

[0071] ≪Evaluation Criteria≫ ◎: No base material is attached. ○: There is almost no adhesion of the base material. △: Some base material adheres to the surface, but it is not a problem. ×: The base material is noticeably attached.

[0072] (Examples 1-5, 7-11) Based on the formulations shown in Tables 1 and 2, the powders of each component were weighed into a plastic bag totaling 200 g. The plastic bag was shaken by hand 100 times to mix the powders and obtain a powder mixture. The obtained powder mixture was compressed using a single-shot tablet press (manufactured by Fuji Pharmaceutical Machinery Co., Ltd., product name "FY-TPF-100S") with a flat, square-cornered punch with a cylindrical diameter of 30 mm, at a compression pressure of 50 kN, to obtain a slow-dissolving composition in the shape of a flat, square-cornered tablet as shown in Figure 1. The weight per tablet was 12 g. The thickness of the slow-dissolving composition was 15 mm, and the rising angle θ of the bulge was 30°. The hardness of the obtained slow-dissolving compositions was measured, and their slow-dissolving properties, crack resistance, and adhesion were evaluated. The results are shown in the table. Note that "-" in the table indicates that the ingredient is not included.

[0073] (Example 6, Comparative Example 1) A slow-dissolving tablet composition was obtained in the same manner as in Example 1, except that the composition of each component was changed to the values ​​shown in Tables 1 and 2, and the tablets were compressed using a flattened square punch with a cylindrical diameter of 10 mm at a compression pressure of 20 kN. The hardness of the obtained slow-dissolving composition was measured, and its slow-dissolving properties, crack resistance, and adhesion were evaluated, and the results are shown in the table.

[0074] (Comparative Example 2) A slow-dissolving tablet composition was obtained in the same manner as in Example 1, except that the composition of each component was changed to the values ​​shown in Table 2, and the tablets were compressed using a flattened square punch with a cylindrical diameter of 5 mm at a compression pressure of 15 kN. The hardness of the obtained slow-dissolving composition was measured, and its slow-dissolving properties, crack resistance, and adhesion were evaluated, and the results are shown in the table.

[0075] [Table 1]

[0076] [Table 2]

[0077] As shown in Tables 1-2, Examples 1-12 to which the present invention was applied all received an evaluation of "△" to "◎" for slow dissolution, crack suppression, and adhesion. Comparative Example 1, in which the slow-dissolving composition was washed in a laundry net, showed a "△" for slow-dissolving properties and a "×" for crack suppression and adhesion properties. Volume is 45 mm 3 Comparative Example 2 showed a "fail" in terms of crack suppression. [Explanation of Symbols]

[0078] 10 Slowly soluble composition 11. Cylindrical section 12 First bulge 12A Zenith 13 Second bulge 13A Zenith 14 Land Section 15 Land Section 20 Slowly soluble composition 21. Cylindrical section 22 First bulge 22A Zenith 23 Second bulge 23A Zenith 24 Land Department 25 Land Section 30 Slowly soluble composition 31. Cylindrical section 31a Top surface 31b Bottom 32 recesses

Claims

1. It is used by placing it in the lint filter or detergent dispenser of the washing machine. Volume is 100 mm ３ The above describes a slow-dissolving composition.

2. The slow-dissolving composition according to claim 1, having a hardness of 8 to 50 kgf.

3. (A) Components: an inorganic metal salt that is sparingly soluble or insoluble in water, (B) Components: One or more selected from wax, hydrogenated oil, sucrose fatty acid ester and cellulosic polymer, (C) Ingredients: Sugars and A slowly dissolving composition according to claim 1 or 2, comprising the following:

4. The slow-dissolving composition according to claim 3, wherein the mass ratio expressed as (component (A) + component (B)) / component (C) is 0.3 to 5.

5. The slow-dissolving composition according to claim 3, wherein the mass ratio of component (A) / component (B) is 0.6 to 6.

6. The slow-dissolving composition according to claim 3, wherein component (A) is one or more selected from synthetic hydrotalcite, magnesium aluminometasilicate, magnesium aluminosilicate, aluminum hydroxide, calcium sulfate, calcium carbonate, calcium hydrogen phosphate, and aluminum silicate.

7. The slow-dissolving composition according to claim 3, wherein the (C) component is one or more selected from mannitol, lactose, sucrose, and oligosaccharides.

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