JP2007308826A - Slipperiness improving agent granulate for washing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a slipperiness improving agent granulate that maintains excellent slipperiness between clothes to be cleaned, washes clothes with a light force, increases the rubbing rate (rubbing time per time) of laundry and facilitates hand washing without causing undissolved residue of potassium metaphosphate and adhesion to clothes when clothes are soaked for washing and when not soaked for washing and a detergent composition containing the slipperiness improving agent granulate for washing. <P>SOLUTION: The slipperiness improving agent granulate for washing comprises potassium metaphosphate having a viscosity of aqueous solution measured by the following conditions of ≥200 mPa s. Potassium phosphate in an amount of 2 g is added to 50 mL of water, stirred for one minute, mixed with a solution obtained by dissolving 4 g of sodium tripolyphosphate in 50 mL of water, stirred for 3 hours and a viscosity is measured by a Brookfield viscometer at 25°C. The detergent composition comprises the slipperiness improving agent granulate for washing. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a granulated product for a smoothness improving agent for laundry. Specifically, it improves hand-washing properties such as being able to wash with light force by improving the smoothness between objects to be washed during hand-washing and increasing the speed of rubbing the laundry (the number of rubbing per hour). The present invention relates to an additive at the time of washing based on a completely new idea for suppressing damage to the object to be cleaned due to friction between objects to be cleaned and hand cuts and scratches caused by rubbing the hand with the object to be cleaned. Moreover, it is related with the detergent composition containing the said smooth property improvement agent granule for washing | cleaning.

  There are two types of washing methods: hand washing and washing machine washing. In recent years, there has been a tendency for washing machine washing to increase due to the widespread use of washing machines, but there are still many needs for hand-washing washing from the viewpoint of stain removal and economic efficiency.

Therefore, conventionally, detergents having desirable physical properties during hand washing have been developed. For example, as disclosed in Patent Document 1, a method for improving skin irritation during hand-washing by blending an anionic surfactant, a cationic surfactant, and a nonionic surfactant at a specific ratio is disclosed. Has been. Regarding foam control, in general, high foaming surfactants such as LAS and AS are used for foam increase, nonionic surfactants such as polyoxyethylene alkyl ether are used for foam control, and foam breakage during rinsing. It is known to use soap or the like for improving the properties. Specifically, a detergent composition excellent in solubility, foamability and rinsing property by containing anionic surfactant, specific nonionic surfactant, and fatty acid soap listed in Patent Document 2 in a specific ratio Things are disclosed.
Japanese National Patent Publication No. 10-504056 Japanese Patent Publication No. 8-13987

  In addition, focusing on the ease of hand-washing (slidability when rubbing the object to be washed), by adding specific potassium metaphosphate to the detergent composition, the friction force between the objects to be washed is reduced, and the There is a technology that improves hand washing and washing performance while maintaining detergency by improving the performance.

  However, when hand-washing is performed, hand-washing is often started after the object to be cleaned is immersed in a solution obtained by dissolving the detergent composition in water for several minutes to several hours and then left standing. In that case, the effect of improving the smoothness expressed by the dissolution of the specific potassium metaphosphate decreases with time. By increasing the particle size of the potassium metaphosphate powder, it is possible to extend the duration of the slipperiness, but there is a problem that the potassium metaphosphate remains undissolved or adheres to clothing.

  Therefore, the object of the present invention is to maintain good smoothness between the objects to be cleaned in both cases of not soaking and soaking without causing dissolution of potassium metaphosphate and adhesion to clothing. , A smoothness improver granule for washing and a smoothness improver granule for washing which can be easily washed by hand by increasing the speed of rubbing the laundry (the number of rubbing per hour). It is in providing the detergent composition containing this.

  The present inventors pay attention to the smoothness when the objects to be cleaned are rubbed together, considering that there are many cases where hand washing is started after immersion washing for several minutes to several hours when washing by hand. As a result of intensive research, it was found that a specific potassium metaphosphate was granulated alone, or a granulated with a specific potassium metaphosphate and a binder substance and / or other components, Not only during hand-washing, but also in hand-washing after immersion washing for a few minutes to several hours, it is possible to wash with light force and increase the speed of rubbing the laundry (the number of rubbing per hour). As a result, the present invention has been completed.

The present invention
[1] Washing slipperiness improver granulated product containing potassium metaphosphate having an aqueous solution viscosity of 200 mPa · s or more measured under the following conditions [Add 2 g of potassium metaphosphate to 50 mL of water and stir for 1 minute. Then, a solution of 4 g of sodium tripolyphosphate (manufactured by Shimonoseki Mitsui Chemicals) dissolved in 50 mL of water was added, stirred for 3 hours, and the viscosity at 25 ° C. was measured with a B-type viscometer], and [2 The present invention relates to a detergent composition containing the laundry slipperiness improver granule according to [1].

  By using the granulated product of the laundry slipperiness improver of the present invention, it does not cause undissolved potassium metaphosphate or adhesion to clothing, and when it is not soaked, or even when soaked for a long time, Good smoothness between the washed objects is maintained, and it is possible to enhance the hand washing feeling by being able to wash with a light force and increasing the speed of rubbing the laundry (the number of rubbing per hour). Further, in washing machine washing, fabric damage can be avoided by improving the smoothness between the fibers against the fiber damage that causes the shape loss caused by mechanical force such as stirring.

<Granulated product for smoothness improver for washing>
The smoothness improver granulated product for laundry of the present invention is characterized in that it contains potassium metaphosphate having a specific viscosity and is a granulated product. The washing smoothness improver granule for washing according to the present invention having such characteristics does not cause undissolved potassium metaphosphate or adhesion to clothes, and when not soaked or even when soaked for a long time, Good smoothness between the objects to be cleaned is maintained, and it has an effect that it can be easily washed by hand, such as being able to wash with a light force and easily increasing the speed of rubbing the laundry.

  In the present invention, the granulated product refers to a product obtained by granulating potassium metaphosphate alone or a product obtained by granulating potassium metaphosphate and a binder substance and / or other components. And the like.

  In the present invention, in this way, by granulating, it is possible to improve handling when adding to the detergent composition in the manufacturing process and to suppress generation of spatter when separately added to the detergent composition during washing. There is also an advantage of being able to do it.

  The granulated product for improving slipperiness of laundry of the present invention (hereinafter abbreviated as “slippery improver”) is used as a slippery improver-containing detergent by mixing with a detergent, or directly with a detergent composition during washing. Although it can also be added and used separately, it is preferable to contain in a detergent composition from the viewpoint of the convenience at the time of use, and solubility. In addition, the said slipperiness improving agent is not limited by the composition, form, manufacturing method, etc. of the detergent composition to be used, The effect can be expressed in all the detergent compositions containing the below-mentioned solubilizer.

  In addition, the granulated product for washing smoothness of the present invention improves the smoothness between objects to be washed at the time of washing by hand, facilitates hand washing, further enhances the feel in hand washing, and further improves hand care and clothing care. It has the effect that it can be achieved. Therefore, the smoothness improving agent granulated product for laundry of the present invention is also used for washing by hand.

  Below, each component used for this invention is demonstrated. In addition, the slipperiness improving agent granulated product for laundry of the present invention is hereinafter simply referred to as a granulated product. The washing liquid refers to a liquid for washing such as a liquid in which the laundry slipping improver granulated product and the detergent composition are dissolved and suspended.

1. Potassium metaphosphate The potassium metaphosphate used in the present invention has an aqueous solution viscosity of 200 mPa · s or more, preferably 250 mPa · s or more, more preferably 300 mPa · s or more when measured using a viscosity measurement method described later. It will be. Further, from the viewpoint of easy availability, 800 mPa · s or less is preferable, and 600 mPa · s or less is more preferable. Since potassium metaphosphate having such a specific viscosity has an advantage that it has remarkably high slipperiness and has a useful performance as a hand-washing detergent, a granulated product of laundry slipperiness improver containing such potassium metaphosphate There is also an advantage that the amount of the slipperiness improving agent can be reduced by adding to the detergent composition.

  Here, the viscosity of the potassium metaphosphate aqueous solution is a solution in which 2 g of potassium metaphosphate is added to 50 mL of water and stirred for 1 minute, and 4 g of sodium tripolyphosphate (manufactured by Shimonoseki Mitsui Chemicals) is dissolved in 50 mL of water. And stirring for 3 hours, and measuring the viscosity at 25 ° C. with a B-type viscometer.

The potassium metaphosphate used in the present invention is generally produced by the following production method.
nKH ₂ PO ₄ → (KPO ₃ ) n + nH ₂ O
In other words, potassium metaphosphate is produced by heating potassium dihydrogen phosphate (KH ₂ PO ₄ ) and performing intermolecular dehydration, but products with various degrees of polymerization are obtained depending on factors such as heating temperature and time, The higher the dehydration reaction, the higher the degree of polymerization. There is a correlation between the degree of polymerization and the slipperiness, and the molecular weight of potassium metaphosphate is preferably 10,000 or more, more preferably 100,000 or more, further preferably 200,000 or more, and 500,000 from the viewpoint of improving hand washing properties. The above is more preferable. Moreover, 50 million or less is preferable and 20 million or less is more preferable from availability.

Potassium metaphosphate is represented by the general formula (KPO ₃ ) n, and its structure is as shown in the following formula.

PO ₄ tetrahedra are bonded (polymerized) by sharing oxygen to form a network of polyphosphate anions, and a structure in which potassium ions are coordinated to neutralize the charge balance of polyphosphate anions. Presents. As shown in the above structure, an element that forms a network of polyphosphate anions such as phosphorus is generally referred to as a network-forming element, and a network-forming element that is isomorphously substituted with phosphorus is bonded to oxygen by sharing an anion. Form a network. An element that plays a role of adjusting the charge of the network of polyphosphate anions, such as potassium, is called a network modifying element.

  The potassium metaphosphate used in the present invention may contain a specific amount of a network-forming element that is isomorphously substituted for phosphorus or a network-modifying element other than potassium. A network forming element that is isomorphously substituted for phosphorus and a network modifying element other than potassium may be contained in the raw material of potassium metaphosphate or in the production process.

  Potassium metaphosphate is known to be used as a builder for detergents. However, in this application, there is no limitation on the network-forming elements that are isomorphously substituted for phosphorus as described above and network-modifying elements other than potassium. Even if it is contained in a proportion, the performance as a builder is not significantly impaired. On the other hand, the potassium metaphosphate used for the use of the present invention has special circumstances that can exhibit performance suitable for the present invention only when the content thereof is limited to a specific range.

  As a raw material of potassium metaphosphate, a further phosphorus source of an industrially available phosphate compound includes so-called phosphate ore produced in nature containing a large amount of calcium phosphate and the like. These phosphorus ores mined from nature are industrially induced to phosphoric acid compounds such as phosphoric acid (salt) through yellow phosphorus, phosphorus oxide and the like. If the purification process is not included, or if the purification is not sufficiently performed, phosphate compounds whose origin is natural phosphorus ore are isomorphic to phosphorus such as arsenic that is carried over from the time it is mined as phosphorus ore It contains a large amount of network forming elements to be replaced. Inexpensive industrial grade phosphoric acid compounds such as detergent use are generally not subjected to a high degree of purification, and such phosphoric acid compounds contain a large amount of network forming elements that are substituted for the same type of phosphorus. The content of network-forming elements that are isomorphously substituted for the contained phosphorus varies depending on the origin of the phosphate ore and the processing process from the phosphate ore, etc. It contains a network-forming element that is isomorphously substituted with about 100 ppm by weight of phosphorus.

  On the other hand, as a potassium metaphosphate raw material, an industrially usable potassium source includes potassium hydroxide obtained by electrolysis of potassium chloride. Potassium chloride is obtained by purifying by an industrial crystallization method from an impure mixture such as carnalite, kanit, silvin, harzzarz, etc., but such industrial grade potassium chloride is another component that cannot be removed by crystallization, That is, it contains a large amount of sodium chloride, magnesium chloride and the like. Such components other than potassium chloride are carried over in potassium hydroxide obtained after electrolysis, so that industrial grade potassium hydroxide contains a large amount of network modifying elements other than potassium.

  In addition, those skilled in the art who perform a series of phosphorus processing steps from phosphate ore to phosphate compounds, or a part of them, have products other than phosphate-potassium compounds that can be used as raw materials for potassium metaphosphate almost without exception. It has produced. These phosphorus processors aim at effective use of processing equipment, for example, processing of phosphate-sodium compounds derived from a phosphate source and a sodium source, and phosphate-potassium compounds that can be used as raw materials for potassium metaphosphate. In general, the production of potassium metaphosphate or the production of potassium metaphosphate itself is carried out in a processing facility such as a common reaction kettle, dryer, or baking furnace. When equipment / process management such as the order of products when changing production varieties and cleaning of processing equipment is not sufficiently performed, all the various raw materials suitable for the potassium metaphosphate of the present invention are prepared. However, this results in an increase in components that are undesirable for the application of the present invention during the processing step.

  It is preferable that various raw materials for preparing the potassium metaphosphate of the present invention also examine components other than phosphorus and potassium, and if necessary, take measures such as purification. For example, as an example in which the content of the network forming element that is isomorphously substituted for phosphorus is within a preferable range, a phosphate-potassium compound such as potassium dihydrogen phosphate supplied as a highly purified food additive is used in the present invention. It is preferable to use for preparing potassium metaphosphate.

  If the content of a network-forming element other than potassium and a network-modifying element other than potassium is the same type, it is incorporated into potassium metaphosphate and expresses the same properties as phosphorus and potassium. It fully demonstrates the performance required for potassium. Although it does not specifically limit as a network formation element which carries out the same type substitution to phosphorus, B, As, Si, Ge, Sb, Ti, Sn, Al, Zr etc. are illustrated. The content of the network-forming element (NWF) that is substituted with the same type of phosphorus is preferably 0 to 0.7 mmol, more preferably 0.0001 to 0.4 mmol, and more preferably 0.0002 to 0.000 per 1 kg of potassium metaphosphate. 1 mmol is more preferred.

  Moreover, although it does not specifically limit as network modification elements other than potassium, Fe, Mg, Ni, Zn, Co, Ca, Sr, Ba, Li, Na, Rb, Cs etc. are illustrated. As for content of these network modification elements (NWM) other than potassium, 0-100 mmol is preferable with respect to 1 kg of potassium metaphosphate, 0.0001-75 mmol is more preferable, 0.0002-25 mmol is further more preferable.

  The content of the network forming element or network modifying element is measured by an atomic absorption analyzer or ICP emission analyzer by the method described later.

  In the present invention, the molar ratio of potassium and phosphorus in the potassium metaphosphate compound (hereinafter referred to as K / P molar ratio) is not particularly limited, but is preferably less than 1, more preferably 0.999. ˜0.94, more preferably 0.99 to 0.98. When the K / P molar ratio is less than 1, the polyphosphate anion in potassium metaphosphate is represented by the following formula:

The cross-linking structure as shown in FIG. 1 can be obtained, and the one-dimensional chain polymer is changed to a two-dimensional layered polymer, so that there is an advantage that the degree of polymerization becomes higher and a higher smoothness is easily exhibited. In addition, K / P molar ratio can be measured with the measuring method as described in the below-mentioned Example.

  Next, the manufacturing method of potassium metaphosphate is demonstrated. As described above, potassium metaphosphate is obtained by dehydrating and condensing potassium dihydrogen phosphate at a high temperature. In the present invention, potassium dihydrogen phosphate and phosphoric acid are mixed to adjust the K / P ratio. Thus, it is obtained by dehydrating condensation at a high temperature.

  It is preferable to mix the potassium dihydrogen phosphate and phosphoric acid uniformly. Potassium metaphosphate melts at 800 ° C. or higher to form a melt. Accordingly, when the synthesis temperature of potassium metaphosphate is 800 ° C. or higher, a molten state is obtained, and the raw materials are uniformly mixed by the diffusion of the liquid. However, in the case of synthesizing at 800 ° C. or lower, since a solid phase reaction is performed, it is preferable from the viewpoint of smoothness that the raw materials are uniformly mixed and then fired. As a specific example of mixing raw materials, since potassium dihydrogen phosphate and phosphoric acid are water-soluble, a method in which they are mixed as a uniform aqueous solution and spray-dried is suitable. As an example of such a mixture, a method of mixing an aqueous solution containing a phosphorus source such as phosphoric acid and a potassium source such as potassium hydroxide in a suitable ratio is substantially the same as the above method. An effect is obtained. Alternatively, powdered potassium dihydrogen phosphate may be charged into a mixer, rotated at high speed, and mixed by spraying or dropping liquid phosphoric acid there. As the mixer, a solid mixer is preferable. For example, a horizontal cylindrical mixer, a V mixer, a double cone mixer, a ribbon mixer, a conical screw mixer, a high-speed fluid mixer, a rotating disk type Examples include a mixer, an airflow stirring mixer, a gravity drop mixer, and a stirring mixer. Among these, a high-speed fluidized mixer that can perform more uniform mixing by high-speed mixing is preferable. Further, by mixing potassium dihydrogen phosphate in water, mixing with phosphoric acid, and then spray drying, a mixed powder in which potassium dihydrogen phosphate and phosphoric acid are uniformly mixed can be obtained.

  In addition, in the aqueous solution in which the potassium dihydrogen phosphate and phosphoric acid are mixed, for example, from the viewpoint of the smoothness of the obtained potassium metaphosphate, a network forming element that is isomorphously substituted with phosphorus and / or a network modifying element other than potassium is added. A method of preparing potassium metaphosphate after spray-drying them and mixing the raw materials uniformly is also preferable.

  The firing temperature at the time of the condensation reaction is preferably 400 ° C. or higher, more preferably 500 ° C. or higher, more preferably 600 ° C. or higher from the viewpoint of slipperiness after immersion, and 1500 ° C. or lower from the viewpoint of energy consumption. Is preferable, 1300 degrees C or less is more preferable, 1200 degrees C or less is more preferable, 800 degrees C or less is further more preferable.

  The potassium metaphosphate obtained by firing is subjected to the subsequent granulation step, but it is preferable to reduce the particle size from the viewpoint of suppressing undissolved residue and adhesion to clothing.

  The average particle size of potassium metaphosphate is preferably 0.5 μm or more, more preferably 1 μm or more, further preferably 5 μm or more, further preferably 10 μm or more, and particularly preferably 30 μm or more from the viewpoint of handling. On the other hand, from the viewpoint of granulation properties and solubility (residual residue / adhesion suppression to clothing), it is preferably 300 μm or less, more preferably 200 μm or less, and even more preferably 100 μm or less.

  As a method of adjusting the average particle diameter of potassium metaphosphate to the above range, the powder is pulverized by a known pulverizer such as an atomizer manufactured by Fuji Powder Co., Ltd., a pin mill manufactured by Hosokawa Micron Co., Ltd., or a turbo mill manufactured by Turbo Industry Co., Ltd. A method is mentioned.

  The content of potassium metaphosphate is preferably 10% by weight or more, more preferably 30% by weight or more, and still more preferably 50% by weight or more from the viewpoint of blendability in the granulated product of the present invention. On the other hand, from the viewpoint of solubility, it is preferably 95% by weight or less, more preferably 90% by weight or less, and further preferably 80% by weight or less.

  In the present invention, the potassium metaphosphate may be granulated alone, or may be granulated by mixing with a binder substance, a solubilizer and other components.

2. Binder material The binder material is not particularly limited as long as it has the ability to bind the components constituting the laundry slipping improver granulated product, but from the viewpoint of the solubility of the granulated product, it is water-soluble. A binder is preferable, and from the viewpoint of storage stability, a thermoplastic water-soluble binder that is solidified and has binding properties at 40 ° C. or lower is particularly preferable. Examples of the water-soluble binder include polyethylene glycol having an average molecular weight of 2000 to 30000, preferably 5000 to 15000, saturated or unsaturated fatty acid having 8 to 18 carbon atoms, and polyethylene glycol is particularly preferable. These may be used alone or in combination. The amount of the binder substance is preferably 0.05 times or more, more preferably 0.07 times or more, more preferably 10 times or less, and more preferably 4 times or less by weight ratio with respect to potassium metaphosphate. The amount of 3 times or less is more preferable.

3. Solubilizers Potassium metaphosphate is very poorly soluble in water but exhibits water solubility in the presence of solubilizers. The solubilizing agent as used herein refers to a compound containing a sodium ion source and / or a lithium ion source and / or an ammonium ion source capable of replacing potassium in potassium metaphosphate. Therefore, by adding a compound that can be a source of sodium ions and / or lithium ions and / or ammonium ions to the washing liquid containing potassium metaphosphate, the potassium metaphosphate is dissolved and the washing water becomes a lotion-like viscosity. As a result, there is an advantage that the smoothness between the objects to be cleaned is improved and the hand-washing property is improved.

  The solubilizer includes all sodium sources and / or lithium ion sources and / or ammonium ion sources that replace potassium in potassium metaphosphate. Also useful are inorganic and organic salts of sodium and lithium and ammonium, such as sodium carbonate, sodium chloride, sodium sulfate, sodium sulfite, sodium citrate and other sodium carboxylates, sodium phosphate, sodium silicate, polycarboxylic acid polymer sodium Salts, polysulfonic acid polymer sodium salt, lithium halide and lithium sulfate. Among these, an inorganic salt or an organic salt of sodium is more preferable. Surfactants or fatty acid salt forms, sequestering agents, and the like can also serve as solubilizers.

  The potassium metaphosphate is water-soluble by replacing potassium ions in potassium metaphosphate with sodium ions and / or lithium ions and / or ammonium ions. It is required to be used in a state where can be dissolved. An effect can be obtained if a part of potassium in potassium metaphosphate can be replaced, but from the viewpoint of economy, an amount of sodium ion and / or lithium that can completely replace potassium ion in potassium metaphosphate contained in the washing liquid An amount of solubilizer that can supply ions and / or ammonium ions is preferred. As the amount of such a solubilizer, when the amount capable of supplying the same amount of sodium ion and / or lithium ion and / or ammonium ion as potassium ion in potassium metaphosphate is 1 times equivalent, 0.5 times equivalent or more Preferably, 1-fold equivalent or more is more preferred, 2-fold equivalent or more is more preferred, and 3-fold equivalent or more is more preferred. On the other hand, in the presence of excess sodium ions and / or lithium ions and / or ammonium ions with respect to potassium ions, the effect of improving hand-washing washability is small. In this respect, the amount of the solubilizer is preferably 400 times equivalent or less, more preferably 200 times equivalent or less, and still more preferably 100 times equivalent or less. Further, from the viewpoint of maintaining a smoothness improving effect, the amount is preferably 30 times equivalent or less, and more preferably 20 times equivalent or less.

  In the case where a necessary amount of sodium ions and / or lithium ions and / or ammonium ions is added to the detergent composition for another purpose, it is not necessary to add a solubilizer separately.

  As other components in the granulated material, any of those generally used as a detergent composition without inhibiting the action of potassium metaphosphate may be used, such as a metal sequestering agent, silicate, phosphate, etc. Can be used as appropriate.

  Further washing properties can be maintained by appropriately selecting the type and amount of granulation aid for the granulated product. In addition, depending on the type and amount of the granulation aid, low mixing of potassium metaphosphate is possible, and the degree of freedom of combining the activator is increased. In this case, the potassium metaphosphate ratio in the granulated product is preferably 80% by weight or less, and most preferably 60% by weight or less. Therefore, although the granulated product of the present invention is limited in the amount of blending by the components such as the binder substance in the granulated product, the problem of improving the washability while maintaining the cleaning power by improving the smoothness It is characterized in that it contains potassium metaphosphate that can cope with the above. The granulating aid other than the solubilizer includes commonly used excipients. Specifically, starches such as Toxeal and Pine Flow, derivatives thereof, and decomposition products thereof.

4). The granulated product of the present invention is not granulated for uniform mixing with a solubilizer, etc. without uneven distribution, particularly when potassium metaphosphate is in a low blending amount. It is thought that it contributes to an effect expression rather than the case where the grain general potassium metaphosphate is used. Although the granulated material of this invention is not specifically limited, For example, it can manufacture by the stirring rolling granulation method, the extrusion granulation method, the spray cooling method, etc. The stirring tumbling granulation method includes, for example, mixing potassium metaphosphate with other components such as a binder substance and a solubilizing agent (sodium source and / or lithium source), and raising the temperature to dissolve the binder substance. And then granulating by adding molten binder substance while stirring and mixing the other components such as potassium metaphosphate and solubilizer (sodium source and / or lithium source) There is a method of adding an aqueous binder solution and granulating the mixture while stirring and mixing other components such as potassium metaphosphate and a solubilizer (sodium source and / or lithium source), and the like. As the extrusion granulation method, for example, a method in which potassium metaphosphate and other components such as a binder substance and a solubilizer (sodium source and / or lithium source) are melt-mixed and granulated through an extrusion granulator, There is a method in which potassium metaphosphate, other components such as an aqueous binder solution and a solubilizer (sodium source and / or lithium source) are melt-mixed, granulated through an extrusion granulator, and then dried. As the spray cooling method, for example, potassium metaphosphate and other components such as a binder substance and a solubilizer (sodium source and / or lithium source) are melt-mixed and sprayed from a nozzle to a low-temperature space and granulated material. There is a method to get.

  In addition, when using a solubilizing agent, since potassium metaphosphate melt | dissolves and thickens with water | moisture content in presence of a solubilizing agent, it is preferable to suppress the water | moisture content at the time of granulation. In such a case, it is preferable to use a thermoplastic water-soluble binder that solidifies and binds at 40 ° C. or lower as the binder material. Examples of the water-soluble binder include polyethylene glycol having an average molecular weight of 2000 to 30000, preferably 5000 to 15000, saturated or unsaturated fatty acid having 8 to 18 carbon atoms, and polyethylene glycol is particularly preferable. Moreover, when using water and binder aqueous solution as a binder substance, it is preferable to fully dry in a post process.

  As an apparatus used for granulation, in the stirring rolling granulation method, for example, a high-speed mixer manufactured by Fukae Kogyo Co., Ltd., a pro-shear mixer manufactured by Taiheiyo Kiko Co., Ltd., and the like, for example, Fuji powder ( There are Pelleter Double made by Co., Ltd. and Twin Dome Gran made by Dalton Co., Ltd.

  The granulated product obtained by such a method may be sized by crushing, spheroidizing or the like as necessary for the purpose of improving the appearance and yield after granulation. As an apparatus used for crushing, a power mill manufactured by Dalton Co., Ltd., a flash mill manufactured by Fuji Powdal Co., Ltd., a Fitzmill manufactured by Fitzpatrick (USA), a com mill manufactured by Comil (Kaguni), and Okada Seiko ( A speed mill manufactured by Co., Ltd. and the like, and as a spheronizing device, a Malmerizer manufactured by Fuji Powder Co., Ltd. and the like can be mentioned. When the thermoplastic water-soluble binder is used, the temperature supplied to the pulverizer is preferably cooled to near room temperature. For example, the granulated product is supplied to a vibration cooler and cooled to a predetermined temperature and then crushed. Then, there exists an advantage that adhesion in the crusher of a crushed material is suppressed.

  The sized granulated product may be adjusted to a desired particle size by classification in order to reduce fine powder and / or coarse powder. By classifying and adjusting the particle size, the appearance during use can be improved. The fine particles and / or coarse powder generated by classification can be pulverized and used as a raw material for granulation, or used as a raw material by remelting to improve the yield.

5). Quality of Granulated Product As the particle size of the granulated product of the present invention, the average particle size is preferably 100 μm or more, more preferably 150 μm or more, and even more preferably 200 μm or more, from the viewpoint of the persistence of the hand washing improvement effect. Moreover, from an external appearance and a soluble viewpoint, less than 2000 micrometers is preferable, less than 1500 micrometers is more preferable, and less than 1000 micrometers is more preferable. Here, the average particle diameter means a 50% weight diameter.

  The shape of the granulated product is most preferably spherical from the viewpoints of appearance and classification, and in the case of an extruded granulated product that is not spheroidized, it is preferable that the ratio of the extruded diameter to the length is close to 1. From the viewpoint of appearance, it is preferable that the particle size distribution is as uniform as possible. On the other hand, from the viewpoint of storage stability, the moisture value in the granulated product is preferably 10% by weight or less, more preferably 5% by weight or less, and still more preferably 1% by weight or less in the final product.

<Detergent composition>
The detergent composition of the present invention is greatly characterized in that it contains the above-mentioned laundry slipperiness improver granulated product, or the above-mentioned laundry slipperiness improver granulated product and a solubilizer and / or other components. Because of having such characteristics, the washing liquid in which the detergent composition is dissolved at the time of washing becomes a lotion-like viscous solution, and even when washing by hand, the smoothness between objects to be washed is improved, so that it can be washed with a light force. In addition to improving hand washing properties such as hand washing, the skin after drying after hand washing has a soft and smooth hand care effect and clothing care effect.

  The detergent composition may be in any dosage form such as powder, granule, liquid, or paste, and may be formed into aggregates, tablets, etc. by secondary processing, but smoothness is quickly and evenly applied to clothing. Therefore, it is preferably in the form of powder or granules. In particular, use as a laundry powder detergent is preferred.

  As content of the said slipperiness improving agent granule for washing | cleaning in a detergent composition, 0.1 to 30 weight% is preferable and 0.5 to 20 weight% is more preferable.

  The content of potassium metaphosphate in the detergent composition is preferably 0.5% by weight or more, more preferably 1% by weight or more, and more preferably 3% by weight in the detergent composition in order to improve the smoothness between objects to be cleaned. The above is more preferable, 5% by weight or more is more preferable, 7% by weight or more is further preferable, and 10% by weight or more is particularly preferable. Further, although the effect of improving the smoothness is high, the handleability of the object to be cleaned after cleaning is lowered, so 30% by weight or less is preferable, and 20% by weight or less is more preferable.

  Further, from the viewpoint of obtaining good hand-washing properties, the concentration of potassium metaphosphate in water when the detergent composition is dissolved to prepare a washing liquid is preferably 15 mg / L or more, more preferably 30 mg / L or more, and 60 mg / L. The above is more preferable. In addition, from the viewpoint of handleability of the object to be cleaned after washing, it is preferably 3000 mg / L or less, more preferably 1500 mg / L or less, and even more preferably 1000 mg / L or less. Furthermore, a decrease in the bath ratio (ratio of water to clothing weight: water weight / clothing weight), an increase in washing liquid hardness, an increase in the amount of nonionic surfactant in the detergent composition, and a detergent for all surfactant components It is preferable to increase the concentration of the potassium metaphosphate in water according to an increase in the weight ratio with respect to the composition.

  As a solubilizer, what is necessary is just the same as what can be used for the said granulated material. Further, the amount of the solubilizer in the detergent composition is preferably 0.5 times equivalent or more, more preferably 1 time equivalent or more, and further preferably 2 times equivalent or more with respect to potassium ions in potassium metaphosphate. 3 times equivalent or more is particularly preferable, and from the viewpoint of maintaining the smoothness improving effect, 30 times equivalent or less is preferable, and 20 times equivalent or less is more preferable. In addition, the solubilizer does not necessarily need to be contained in the detergent composition as long as it is contained in the laundry slipperiness improver granulated product.

  The detergent composition of the present invention may further contain a surfactant and / or a builder.

  As the surfactant, those generally used can be used. For example, an anionic surfactant and a nonionic surfactant are mentioned. Examples thereof include alkylbenzene sulfonates, alkyl ethers or alkenyl ether sulfates, alkyl or alkenyl sulfate esters, α-olefin sulfonates, alkane sulfonates, N-acyl amino acid type surfactants, alkyl or alkenyl ethers. Carboxylic acid salt, amino acid type surfactant, anionic surfactant such as alkyl or alkenyl phosphate ester or salt thereof, polyoxyalkylene alkyl (or alkenyl) ether, polyoxyethylene alkylphenyl ether, higher fatty acid alkanolamide or the like Nonionic surfactants such as alkylene oxide adducts, sucrose fatty acid esters, alkyl glycosides, and fatty acid glycerin monoesters are exemplified.

  Among these, from the viewpoint of enhancing the smoothness effect, alkylbenzene sulfonates, alkyl ether sulfates, and alkyl sulfate esters are preferable, and sodium alkylbenzene sulfonate is more preferable.

  The content of the surfactant is preferably 5% by weight or more, more preferably 10% by weight or more, further preferably 12% by weight or more, further preferably 15% by weight or more from the viewpoint of cleaning performance in the detergent composition. More preferably, it is 17% by weight or more. Further, from the viewpoint of powder physical properties, it is preferably 40% by weight or less, more preferably 35% by weight or less, further preferably 30% by weight or less, and further preferably 26% by weight or less.

  In the detergent composition of the present invention, surfactants such as betaine amphoteric surfactants, phosphate ester surfactants, soaps and cationic surfactants can be appropriately blended.

  Examples of the builder include a sequestering agent, an alkaline agent, and a recontamination preventive agent.

Above all, as the amount of hardness component in the wash water increases, there is a feature that the effect of improving the smoothness decreases, so as a builder, it is possible to mix a sequestering agent in the detergent composition and capture the hardness component in the wash water. It is very effective for the performance of potassium metaphosphate. Furthermore, a sequestering agent having a calcium ion scavenging ability of 100 mgCaCO ₃ / g or more is more effective. Such sequestering agents include zeolites, ion exchangers such as crystalline silicates, polyacrylates, polymers such as acrylic acid-maleic acid copolymers (salts), sodium tripolyphosphate, ethylenediaminetetraacetate And water-soluble organic substances such as chelating agents such as methylglycine diacetate and citrate.

  In addition, potassium metaphosphate, sodium carbonate, and amorphous sodium silicate are not included in the sequestering agent.

  Examples of the alkali agent include carbonates and silicates. From the viewpoint of enhancing the smoothness effect, amorphous sodium silicate is preferable.

  Examples of the recontamination preventive agent include carboxymethyl cellulose and polyethylene glycol.

  The blending amount of the builder is preferably 5% by weight or more, more preferably 10% by weight or more, further preferably 15% by weight or more, and further preferably 20% by weight or more in the detergent composition from the viewpoint of improving hand washing properties. Moreover, from a viewpoint of the balance of a mixing | blending, 60 weight% or less is preferable, 40 weight% or less is more preferable, and 30 weight% or less is especially preferable.

  Further, the detergent composition of the present invention has an advantage that the effect of improving the smoothness can be further improved by further blending silicate and / or phosphate.

Silicates are known to be amorphous and crystalline, and any of them can be used. Here, the SiO ₂ / M ₂ O molar ratio (M is an alkali metal) is preferably 1 or more, more preferably 1.5 or more, still more preferably 2 or more, and preferably 4 or less, more preferably 3 or less. More preferably, it is amorphous sodium silicate, and JIS No. 1 sodium silicate or JIS No. 2 sodium silicate can be suitably used. The blending amount is preferably 3% by weight or more, more preferably 5% by weight or more, and even more preferably 7% by weight or more in the detergent composition from the viewpoint of hand-washing washability. Further, from the viewpoint of suppressing undissolved residue during washing while maintaining a high smoothness improving effect, the blending amount is preferably 30% by weight or less, and more preferably 20% by weight or less.

  Examples of phosphates (excluding potassium metaphosphate) include sodium tripolyphosphate, sodium pyrophosphate, monosodium phosphate, disodium phosphate, trisodium phosphate, etc. Sodium tripolyphosphate is preferred, Is preferably 5% by weight or more, more preferably 10% by weight or more, and still more preferably 15% by weight or more in the detergent composition from the viewpoint of hand-washability. Further, from the viewpoint of achieving both the smoothness improving effect and the detergency, 40% by weight or less is preferable, and 30% by weight or less is more preferable.

  In the present invention, among the above ingredients, the sequestering agent, the silicate, and the phosphate are blended in the above amounts, so that the hand-washing washability is kept good even when the blending amount of potassium metaphosphate is reduced. There is a merit to droop.

  In the detergent composition of the present invention, enzymes, fragrances, fluorescent dyes, pigments and the like can be appropriately blended.

  The detergent composition of the present invention having the above-described configuration can be produced by appropriately mixing the above components by a known method. Examples of such detergent compositions include, for example, detergent compositions obtained by the composition and production method described in Japanese Patent Office Gazette 10 (1998) -25 (7159), well-known conventional technical collection (powder detergent for clothing). .

  In addition, since the potassium metaphosphate contained in the detergent composition of the present invention becomes water-soluble in the presence of a solubilizer in water as described above, the moisture during the manufacturing process or storage Is preferably reduced. For example, when a detergent composition is produced by a spray drying method, it is desirable to add a smoothness improving agent granulated product in a granulation step, a surface modification step, an after blending step, and the like after the spray drying step.

  Further, a washing liquid may be prepared by adding a detergent composition composed of components excluding the smoothness improver granulated product and the smoothness improving agent granulated product separately during hand washing. The smoothness improver granulated product can be suitably used because it suppresses the generation of spatter during dissolution.

  By using the detergent composition of the present invention having the above-described configuration, it does not cause undissolved potassium metaphosphate or adherence to clothing, and if it is not soaked or is soaked, it is cleaned. Good smoothness between the objects is maintained, and it is easy to wash by hand without impairing detergency, and further, an effect that hand care can be achieved is exhibited.

  EXAMPLES Hereinafter, although an Example demonstrates this invention concretely, it is not limited to these Examples.

<Viscosity measurement method>
Add 2 g of potassium metaphosphate to 50 mL of water and stir for 1 minute. Add a solution of 4 g of sodium tripolyphosphate (manufactured by Shimonoseki Mitsui Chemicals) in 50 mL of water and stir for 3 hours to obtain a B-type viscosity. The viscosity at 25 ° C. is measured with a total.

<Measurement of Na content>
Dissolve 0.1 g of sample in water and add 4 mL of HCl (1: 1 (volume ratio)) aqueous solution to make the total volume 50 mL. Using this solution, the amount of Na in the sample is measured with an atomic absorption analyzer (Atomic Absorber manufactured by VARIAN, Spectra AA220).

<Measurement of As content>
Dissolve 5 g of sample in water and add 4 mL of HCl (1: 1 (volume ratio)) aqueous solution to make the total volume 50 mL. Using this solution, the amount of As in the sample is measured with an ICP emission analyzer (manufactured by HORIBA / JOBIN YVON, JY238ULTRAACE).

<Measurement method of K / P molar ratio>
A sample of 0.1 g is taken in a platinum crucible, and 5 g of Li ₂ B ₄ O ₇ and 0.5 g of a release agent (Li ₂ CO ₃ : LiBr: LiNO ₃ = 5: 1: 1 (weight ratio)) are added. A glass bead is prepared by melting at 1230 ° C. using a bead sampler (NT-2100, manufactured by Tokyo Kagaku Co., Ltd.).

K and P in the glass beads are measured under the following conditions (XRF intensity) with a fluorescent X-ray apparatus (manufactured by Rigaku Corporation, ZSX100e).
X-ray source: Rh tube Voltage / current: 50 kV, 50 mA
Spectroscopic crystal: detector angle K: LiF SC (scintillation counter) 136.68 deg
・ P: Ge PC (proportional counter) 141.19deg

The K / P molar ratio was calculated by measuring KH ₂ PO ₄ (manufactured by Sigma-Aldrich Japan Co., Ltd., reagent special grade) in the same manner as the sample, and using the K / P molar ratio of 1.00 as a reference, The ratio is calculated by the following calculation.

<Measuring method of average particle diameter of potassium metaphosphate>
Disperse 25 ° C. ion-exchanged water using a laser scattering particle size distribution analyzer (Horiba, LA-920) under the conditions of a refractive index of 1.2, an ultrasonic intensity of 7, an ultrasonic irradiation time of 1 minute, and a stirring speed of 4. A sample (potassium metaphosphate) is measured as a medium, and an average particle diameter (μm) as a volume reference is obtained. The average particle diameter here refers to the median diameter.

<Measuring method of average particle diameter of granulated product>
The average particle diameter (Dp) indicates a 50% diameter by weight and is measured and calculated by the following method. That is, 100 g of a granulated product as a sample was obtained from a metal mesh sieve of JIS Z8801-1 (openings: 2000 μm, 1410 μm, 1000 μm, 710 μm, 500 μm, 355 μm, 250 μm, 180 μm, 125 μm), a saucer, and a low tap shaker. After performing the classification operation for 3 minutes using the classifier, the weight frequency is accumulated in order from the fine particles to the coarse particles, and the opening of the first sieve where the accumulated weight frequency is 50% or more Is a μm, and when the opening of the sieve that is one step larger than a μm is b μm, the cumulative weight frequency from the tray to the a μm sieve is c%, and the weight frequency on the aμm sieve is d%, It can be determined according to the following (formula).
Dp = 10 ^A (formula)
However, A = [50- (cd / (log b-log a) * log b)] / [d / (log b-log a)]
In addition, depending on the particle size of the target sample, it is necessary to perform measurement by adding an appropriate sieve sieve to the particle size.

Potassium metaphosphate preparation example 1
2880 g of each KH ₂ PO ₄ containing Na and As in the amounts shown in Table 1 was dissolved in 36 liters of ion-exchanged water. Next, the mixture was adjusted by adding H ₃ PO ₄ (manufactured by Wako Pure Chemical Industries, Ltd., reagent grade, purity 85%) so that the K / P molar ratio became the value shown in Table 1, and further stirred. This solution was spray-dried with a spray dryer (manufactured by Tokyo Rika Kikai Co., Ltd., spray dryer SD-1000 type) to obtain a powder. The obtained powder was transferred to an alumina crucible and fired at 700 ° C. for 3 hours to obtain potassium metaphosphate 1-1 to 1-5 shown in Table 1.

  The obtained potassium metaphosphate was coarsely pulverized with a hammer, and then the atomizer (manufactured by Fuji Powder Co., Ltd.) was used to change the hammer rotation speed, raw material feed speed, screen aperture ratio, and screen aperture diameter during pulverization. Thus, the particles were pulverized to a desired particle size, and the average particle size of each was measured.

Base detergent composition preparation example 1
370 kg of water, 200 kg of 50 wt% sodium dodecylbenzenesulfonate aqueous solution, 50 kg of 40 wt% No. 2 silicate aqueous solution, 100 kg of sodium carbonate, 147.5 kg of sodium sulfate, 5 kg of polyethylene glycol, 2.5 kg of CBS type fluorescent dye, 125 kg of zeolite After mixing to prepare a homogeneous slurry, the slurry was spray dried to obtain a base detergent composition.

Examples 1-3 and Comparative Examples 1-2
A high-speed mixer (Mitsui Miike Co., Ltd.) prepared by adjusting 0.4 kg of the pulverized potassium metaphosphate shown in Table 2 and 0.086 kg of sodium lauryl sulfate (Kao Co., Ltd., Emar 10 powder) to 80 ° C. The volume was 2 L, with a jacket), and the mixture was stirred until the temperature of the mixture reached 70 ° C. under the condition of the spindle rotation speed of 3600 r / m. Thereafter, 0.086 kg of polyethylene glycol adjusted to 70 ° C. (manufactured by Kao Corporation, KPEG6000) was added, and stirring was further continued for 3 minutes. Next, the obtained mixture was charged into an extrusion granulator (Dalton Co., Ltd., Dome Gran) and extruded under the condition of an opening diameter of φ0.5 mm for consolidation. The obtained extrudate is cooled and further pulverized using a granulator (Dalton Co., Ltd., power mill, screen φ1.0 mm) and classified to add an average particle size of 700 μm or less to −355 μm or more. Adjusted.

  The obtained extruded granulated product and the base detergent composition were uniformly mixed at a ratio of 4.3% by weight and 95.7% by weight, respectively, to obtain a detergent composition.

Comparative Examples 3-4
In mixing with the base detergent composition, a pulverized product of potassium metaphosphate is used instead of an extruded granulated product, and the pulverized product and the base detergent composition are mixed at a ratio of 3.0% by weight and 97.0% by weight, respectively. A detergent composition was obtained in the same manner as in Example 1 except that the mixture was uniformly mixed.

Examples 4-5
In the preparation of the granulated product, the extruded granulated product was treated in the same manner as in Example 1 except that sodium palmitate (powder product) and Pine Flow (manufactured by Matsutani Chemical Industry Co., Ltd.) shown in Table 3 were added as raw materials. Obtained. The obtained extruded granulated product and the base detergent composition were uniformly mixed at a ratio of 6% by weight and 94% by weight, respectively, to obtain a detergent composition.

  In the present invention, a particularly preferable smoothness improving effect can be evaluated by performing hand-washing under washing conditions according to the following hand-washing washing evaluation method.

Test example 1 (hand washing evaluation)
2 liters of hard water (Ca / Mg = 7/3 (molar ratio)) corresponding to 89.3 mg CaCO ₃ / liter adjusted to 25 ° C. with a diameter of 30 cm, a depth of 13 cm and a capacity of 8.2 L (YAZAKI) After weighing 8.48 g of the obtained detergent composition and putting it into water, stirring by hand was continued to the extent that the water did not scatter from the basin. Thirty seconds after the start of stirring, a 100% cotton T-shirt (Gunze white, L size) was immersed in the washing water in the basin so that the entire T-shirt was sufficiently wet. One minute and 15 minutes after the start of immersion, the following washing procedures (1) to (3) were performed, and the smoothness was evaluated based on the following evaluation criteria. Further, after the immersion for 15 minutes, the following washing procedures (1) and (2) were continuously repeated for 15 minutes, and the rubability at that time was similarly evaluated. About each detergent composition, the average value of the panel evaluation result of 6 persons was computed. The results are shown in Tables 2 and 3. It should be noted that rank 1 of the evaluation criteria for slipperiness is very high because the wrinkles of the T-shirt hinder the slipperiness and there are no bubbles in the rubbing part when this evaluation is performed using only the above adjusted hard water. It is difficult to rub against and indicates a state of poor smoothness. By the way, the smoothness rank is 1 when the same evaluation is performed only with the above-mentioned base detergent composition and only with a domestic detergent not containing potassium metaphosphate.

[Laundry procedure]
(1) Hold the T-shirt chest with both hands from the back of the T-shirt, and rub the T-shirt chests together while leaving the wash water.
(2) Every time (1) is repeated 3 to 5 times, immerse the part to be rubbed with cleaning water.
(3) Repeat (1) and (2) five times in succession, and determine the ease of rubbing when they are rubbed together.

[Evaluation criteria for smoothness]
Rank 1: The slipperiness is very low, there is a squeaky feeling, and hand washing is very difficult.
Rank 2: Low smoothness, squeaky feeling, and difficult to wash by hand.
Rank 3: The smoothness is moderate, and there is no feeling of squeezing and it can be washed by hand.
Rank 4: High smoothness, no squeaky feeling and easy to wash by hand.
Rank 5: Very smooth, no squeaky feeling, and easy to wash by hand.

Test example 2 (dissolution residual evaluation)
Washing machine washing was performed under the following conditions.
・ Washing machine: Matsushita Electric NA-F42Y5
・ Laundry: Black cloth [Blend (Polyester / Cotton = 65/35 (weight ratio))] ・ Detergent: 40g
・ Laundry course: Middle water level (40 liters of water)
9 minutes for washing → 2 times for rinsing → 3 minutes for dehydration → drying (left at 20 ° C, 40% RH for 24 hours)
After the clothes were dried, 10 out of 20 black cloths were arbitrarily selected. The water insoluble matter adhesion / remaining property to the black cloth at that time was evaluated based on the following evaluation criteria. The results are shown in Tables 2 and 3.

[Evaluation of adhesion / persistence]
○: No problem (no deposits)
△: Slightly adhered ×: There is adhered matter XX: There is a large amount of adhered residue

  From the above results, the detergent compositions of Examples 1 to 3 containing a granulated product of potassium metaphosphate having a viscosity of 200 mPa · s or more maintain good smoothness and have no problem with residual / adhesiveness. I understand. On the other hand, the detergent compositions of Comparative Examples 1 and 2 containing a granulated product of potassium metaphosphate having a viscosity of less than 200 mPa · s have no problem with residual / adhesion, but the slipperiness is inferior after 1 minute of immersion, Moreover, it turns out that the detergent composition of Comparative Examples 3-4 using the pulverized product instead of the granulated product of potassium metaphosphate has good smoothness after 1 minute of immersion, but deteriorates with time. Further, the detergent compositions of Examples 4 to 5 with a reduced amount of potassium metaphosphate maintain good sliding properties and have no problem with residual / adhesive properties. Then, it turns out that preparation of the detergent composition which decreased the compounding quantity of potassium metaphosphate using the granulated product of potassium metaphosphate whose viscosity is 200 mPa * s or more is possible.

The smoothness improver granulated product for washing of the present invention is suitably used in hand-washing clothes such as clothes, especially hand-washing laundering for a long time.

Claims (12)

A granulated product of a slipperiness improving agent for washing, comprising potassium metaphosphate having an aqueous solution viscosity of 200 mPa · s or more measured under the following conditions.
[Add 2 g of potassium metaphosphate to 50 mL of water and stir for 1 minute. Then, add a solution of 4 g of sodium tripolyphosphate (manufactured by Shimonoseki Mitsui Chemicals Co., Ltd.) in 50 mL of water and stir for 3 hours. The viscosity at 25 ° C. is measured with a viscometer. ]   The washing slipper according to claim 1, wherein the content of the network-forming element that is substituted with phosphorus for the same type is 0 to 0.7 mmol and the content of the network-modifying element other than potassium is 0 to 100 mmol with respect to 1 kg of potassium metaphosphate. Granules for improving performance.   Spray drying potassium metaphosphate aqueous solution of potassium dihydrogen phosphate and phosphoric acid, or an aqueous solution containing potassium dihydrogen phosphate, phosphoric acid, network-forming elements that are isomorphously substituted for phosphorus and / or network modifying elements other than potassium Then, the smoothness improver granulated product for laundry according to claim 1 or 2, which is obtained by firing.   The average particle size of potassium metaphosphate is 0.5 µm or more and 200 µm or less.   Furthermore, the slipperiness improving agent granule for washing | cleaning in any one of Claims 1-4 containing a binder substance.   6. The laundry slipperiness improver granulated product according to claim 5, wherein the binder substance is polyethylene glycol.   Furthermore, the slipperiness improving agent granulation for washing | cleaning in any one of 1-6 containing a solubilizer.   It is for hand-washing laundry, The smoothness improving agent granule for washing | cleaning in any one of Claims 1-7.   The average particle size is 100 µm or more and less than 2000 µm, the granulated product of the laundry slipperiness improver according to any one of claims 1 to 8.   A detergent composition comprising the laundry slipperiness improver granulated product according to any one of claims 1 to 9.   A detergent composition comprising the laundry slipperiness improver granulated product according to any one of claims 1 to 9 and a solubilizer. The detergent composition according to claim 10 or 11, further comprising a surfactant and / or a builder.