KR20030063480A - Improved detergent composition - Google Patents

Abstract

The present invention provides iv) from 2 to 50% by weight of saturated fatty acid soap comprising at least one salt of C ₆ -C ₂₄ fatty acid, v) 2 to 40% by weight of detergent active ingredient, and vi) water and optionally at least one other liquid 30 to 80% by weight of the formulation, having a solids content of less than 30%, exhibiting a yield stress greater than 75 kPa in a temperature range of 20 to 40 ° C. and a pure concentration transition type liquid crystal phase in a temperature range of 20 to 100 ° C. It does not show, and melt casting detergent composition which forms an isotropic liquid phase in the temperature range of 40-100 degreeC, or forms the dispersion liquid of a concentration transition type liquid crystal phase in the continuous body of an isotropic liquid.

Description

Improved detergent composition {IMPROVED DETERGENT COMPOSITION}

Detergent tablets are typically prepared by one of two methods: (i) shear working / homogenizing the formulation followed by extrusion and stamping, or (ii) casting.

When preparing detergent tablets by shearing and extrusion, the amount of water that can be incorporated into the formulation is typically less than about 15%. Such a system is a multiphase composite that exhibits the form of a "masonry suspended in mortar" type. Bricks are solid particles, and in the case of cosmetic soaps are crystalline salts of long chain saturated fatty acids, inorganic particles and the like. Mortars are mixtures of various lyotropic liquid crystal phases or isotropic solution phases comprising water, liquid additives and relatively water soluble soaps or surfactants. The composition will typically comprise 40 to 60% solids, 20 to 50% concentration transition liquid crystal phase and up to 10% isotropic liquid.

In the case of preparing the detergent composition by the casting method, the blended system is raised to a fluidized bed, filled into a mold and cooled. The technique involves a transparent personal cleanser comprising at the time of casting, typically 15 to 50% of the expensive alcoholic components (eg ethanol, polyhydric alcohols, sugars, etc.) among other components (eg soaps and synthetic surfactants). It is mainly used to manufacture tablets.

U.S. Patent 4,165,293 (Amway, 1979); And WO 96/04361 (P & G, 1996) disclose solid, transparent soap bars comprising soaps, synthetic surfactants and water soluble organic solvents such as propylene glycol. The water content in the composition is about 10 to 32%.

The problem with making opaque detergent tablets by the casting method is that typical compositions do not form pourable liquids at elevated temperatures. U.S. Patent 5,340,492 (P & G, 1994) claims a castable composition comprising neutralized crystalline carboxylic acid (soap), synthetic surfactants and high amounts of water and other liquids. The composition prepared as described in US Pat. No. 5,340,492 is soft and exhibits a yield stress of less than 75 kPa when measured with a cheese wire cutter device, making it not suitable as a hard enough and robust tablet to be conveniently held in use. .

In order to increase the stiffness of the bar, the examples of this patent use components such as polyols (such as propylene glycol) in the composition in the name of "bar appearance aid". The patent does not disclose any composition without the incorporation of a "bar appearance aid" when a synthetic surfactant is also present in the composition. Such bar appearance aids are expensive and reduce the amount and speed of foam as well as are known in the art (US Pat. No. 4,165,293, WO 96/04361).

The co-pending application (717 / Bom / 99) discloses a low salting-in electrolyte in a melt-casting detergent composition comprising fatty acid soaps, detergent active ingredients, very high amounts of water or liquid useful formulations. The incorporation of the present invention discloses that a solid solid form product can be produced which exhibits a yield stress greater than 75 kPa when measured with a cheese wire cutter device. Such compositions are hand woven, economical, foamy and exhibit good properties in use. Fatty acid soaps according to this application are one or more neutralized C ₆ -C ₂₄ fatty acids.

Prior art generally relates to the stiffness of the bar by using additives such as polyols, salt electrolytes or other bar appearance aids in melt-casting detergent compositions comprising fatty acid soaps, detergent active ingredients, very high amounts of water or liquid useful agents. Teach that you can increase.

It now contains less than 30% solids and high concentrations of water or other liquid useful agents, is hard with no additives or used at very low concentrations, and exhibits a yield stress greater than 75 kPa in the temperature range of 20-40 ° C. It is now possible to obtain a melt casting detergent composition.

The present invention is a melt-cast solid shaped that has a solids content of less than 30% and contains very high levels of water or liquid benefit agents but exhibits high rigidity and good properties in use. ) Relates to a detergent composition.

In a first embodiment, the present invention,

a) 2 to 50% by weight saturated fatty acid soap comprising at least one C ₆ -C ₂₄ fatty acid salt,

b) 2-40% by weight of the detergent active ingredient, and

c) 30 to 80% by weight of water and optionally other liquid useful agents

As a molten cast detergent composition comprising a, preferably in the form of a tablet with a solids content of less than 30% and exhibiting a yield stress greater than 75 kPa in a temperature range of 20 to 40 ° C,

It is characterized by not forming a pure transition liquid crystal phase in the temperature range of 20 to 100 ° C., but forming an isotropic liquid phase in the temperature range of 40 to 100 ° C. or forming a dispersion of the concentration transition liquid crystal phase in a continuum of isotropic liquid. Composition.

In a more preferred embodiment of the invention,

a) 2 to 50% by weight saturated fatty acid soap comprising at least one C ₆ -C ₂₄ fatty acid salt,

b) 2-40% by weight of the detergent active ingredient, and

c) 30 to 80% by weight of water and optionally other liquid useful agents

A melt cast detergent tablet composition comprising a, wherein the melt content is less than 30%, does not contain additives, and exhibits a yield stress greater than 75 kPa in a temperature range of 20-40 ° C.,

It is characterized by not forming a pure transition liquid crystal phase in the temperature range of 20 to 100 ° C., but forming an isotropic liquid phase in the temperature range of 40 to 100 ° C. or forming a dispersion of the concentration transition liquid crystal phase in a continuum of isotropic liquid. To provide a composition.

Additives commonly used in the prior art are ethanol, propylene glycol and other polyols, salt electrolytes and the like. In the present invention, it is preferable not to use any of these in the composition.

More specifically, the detergent composition of the present invention preferably does not contain solvent alcohol, and preferably does not contain polyhydric alcohol. Here, "free" means that the composition will contain less than 5%, more preferably less than 1%, even more preferably less than 0.5% by weight of polyhydric alcohol, or no polyhydric alcohol at all. That means you can.

It is also preferable that the composition of the present invention does not contain a salt electrolyte; That is, the composition may contain less than 1%, more preferably less than 0.5% salt electrolyte, or preferably it may not contain at all. It is preferred that the detergent active ingredient is mainly non-soap.

The presence of the isotropic liquid phase and liquid crystal phase in the surfactant system is preferably detected using optical polarization microscopy techniques. The liquid crystal phase is anisotropic in nature, so the refractive index varies depending on the orientation. In general, such birefringence systems change the polarization plane of polarization. Between crossed polarizers the isotropic liquid appears black, but the liquid crystal system is more transparent. For example, a lamellar liquid crystal phase exhibits maltose-cross or oil streaks (such as a large noose), while a hexagonal phase exhibits a scalloped structure. Various concentration transition liquid crystal phases and dispersions thereof have been reported in the literature.

According to another aspect of the present invention,

a) preparing a melt of the detergent composition,

b) pouring the melt into a mold to obtain the desired shape, and

c) cooling the mold under stationary conditions to cause solidification

Provided is a method for producing a solid detergent composition of the present invention comprising a.

According to a preferred aspect of the present invention,

a) preparing a melt of the detergent composition,

b) pouring the melt into a pre-formed polymer mold to obtain the desired shape,

c) sealing the mold, and

d) cooling the mold under stationary conditions to cause solidification

Provided is a method of producing a cast-in-packed solid phase detergent composition comprising a.

The present invention relates to detergent compositions which comprise less than 30% solids and high amounts of water or other liquid useful formulations and which have essentially the specific phase behavior from which a rigid melt-casting tablet can be obtained. The detergent composition does not exhibit a pure concentration transition liquid crystal phase in the temperature range of 20 to 100 ° C., but forms an isotropic liquid phase in the temperature range of 40 to 100 ° C. or forms a dispersion of the concentration transition liquid crystal phase in a continuous body of the isotropic liquid. There is a characteristic.

The presence of the isotropic liquid phase and liquid crystal phase in the surfactant system can be preferably detected using optical polarization microscopy techniques. The liquid crystal phase is anisotropic in nature, so the refractive index varies depending on the orientation. In general, such birefringence systems change the polarization plane of polarization. Between crossed polarizers the isotropic liquid appears black, but the liquid crystal system is more transparent. For example, lamellar liquid crystal phases exhibit maltose cross or oil streaks (such as large noose), while hexagonal phases show non-geometric scalloped structures. Several tissues may be observed within the same phase structure.

Characteristic tissues of various concentration transition liquid crystal phases (and dispersions thereof) have been reported in the following literatures: (i) Robert rats. "The Aqueous Phase Behavior of Surfactant" by Robert G. Laughlin, Academic Press, New York, 1994, pp. 538-542, (ii) d. "The Colloidal Domain Where Physics, Chemistry, Biology, and Technology Meet" by D. Fennell Evans, Hakan Wennerstrom, VCH Publishers, New York, 1994, pp. 251 and 252.

The solid product of the composition according to the invention is hard enough to be conveniently held in the hand, economical, foamy and exhibits good properties in use. The composition shows a yield stress value greater than 75 kPa when measured with an automatic petrometer.

The saturated fatty acid soap is preferably selected from one or more saturated C ₆ -C ₂₄ fatty acid salts. The soap used may be the sodium, potassium, magnesium, aluminum, calcium or lithium salts of saturated fatty acids. Particular preference is given to soaps obtained as the sodium or potassium salts of saturated fatty acids.

The saturated fatty acid soap in the composition is preferably 5 to 50% by weight, more preferably 5 to 40% by weight.

The composition according to the invention also comprises a detergent active ingredient which may be soap-based or non-soap-based. Preference is given to using non-soap based detergent active ingredients selected from anionic, nonionic, cationic, amphoteric or zwitterionic surfactants, or mixtures thereof.

Suitable anionic detergent active compounds are water soluble salts of organic sulfuric acid reaction products with alkyl radicals containing 8 to 22 carbon atoms in the molecular structure, and radicals selected from sulfuric or sulfuric acid ester radicals and mixtures thereof. Some examples of synthetic anionic detergent active compounds include linear alkyl benzene sulfonates, sodium lauryl sulfate, sodium lauryl ether sulfate, alpha olefin sulfonates, alkyl ether sulfates, fatty acid methyl ester sulfonates, alkyl isothionates Etc.

The most suitable cations for the detergent active ingredient are sodium, potassium, ammonium and various amines such as monoethanol amines, diethanolamines and triethanolamines.

Suitable nonionic detergent active compounds can be broadly described as compounds produced by the condensation of organic hydrophobic compounds which are originally aliphatic or alkyl aromatic with hydrophilic alkylene oxide groups. Typical nonionic surfactants are ethylene and aliphatic alcohols having 8 to 22 carbon atoms in straight or branched chain form, such as coconut oil ethylene oxide condensates having 2 to 15 moles of ethylene oxide, per mole of coconut alcohol. Condensation products with oxides. Some examples of nonionic surfactants include alkyl phenol ethylene oxide (EO) condensates, tallow alcohol 10 EO condensates, alkyl de-methyl amine oxides, lauryl mono-ethanolamides, sugar esters, and the like.

Examples of amphoteric detergent active ingredients include coco amidopropyl betaine, coco betaine and the like.

It is also possible to include cationic or zwitterionic detergent active ingredients in the compositions according to the invention.

Further examples of suitable detergent-active compounds are given in the literature: egg. M. R. Porter, "Handbook of Surfactants", Chapman and Hall, New York, 1991.

It is preferable that the detergent active ingredient used for the detergent composition of this invention is anionic, and it is generally 40 weight% or less, More preferably, it is 2-30%.

According to a preferred aspect of the present invention, liquid skin useful substances such as moisturizers, softeners, sunscreens and anti aging compounds may be incorporated into the compositions. Examples of humectants and humectants include polyols, glycerol, cetyl alcohol, Carbopol 934, ethoxylated castor oil, paraffin oil, lanolin and derivatives thereof. Silicone surfactants such as DC3225C (Dow Corning Products) and / or silicone softeners, and silicone oils (such as DC200 Ex-Dow Corning Products). 4-t-butyl-4'-methoxy dibenzoylmethane (commercially available from Givaudan under the name Parsol 1789) and / or 2-ethylhexyl methoxy cinnamate (named Parsol) Commercially available from Givaudan as MCX] or other sunscreen agents such as UV-A and UV-B sunscreens may also be used. Other skin useful agents, such as polyethylene glycol (PEG), can also be incorporated into the compositions.

Although the composition preferably does not contain polyols and salt electrolytes, salt electrolytes, polyols, hair conditioners, fillers, colorants, anti-water, milky, preservatives, polysaccharides, kaolin, one or more water insoluble particulate matter such as talc, and other Conventional components can be incorporated into the compositions.

Preferred methods of the present invention comprise melts of detergent compositions comprising from 2 to 50% by weight of saturated fatty acid soaps, from 2 to 40% by weight of non-soap based detergent actives and from 30 to 80% of water or other liquid useful agents. It may be a method of manufacturing, wherein the composition does not exhibit a pure transition liquid crystal phase in the temperature range of 20 to 100 ℃, form an isotropic liquid phase in the temperature range of 40 to 100 ℃ or the concentration in the continuum of the isotropic liquid It is characterized by forming the dispersion liquid of a transition type liquid crystal phase. In this process, the melt is poured into any suitable mold or pre-molded polymeric mold to obtain the desired shape, and the mold is sealed to cool under stationary conditions to solidify.

Proper selection of the mold can produce a near net shape tablet or a bar / block. Bars / blocks may be further molded to make detergent products.

If a solid detergent product is prepared using an orthopedic thermoformed polymer, the mold can be sealed to obtain a sealed cast detergent composition. In order to obtain a sealed cast detergent composition, it is preferable to seal the mold immediately after filling the mold.

The present invention is intended to be illustrated by the following non-limiting examples.

Example 1

Screening of Compositions by Phase Behavior

The composition according to the present invention does not exhibit a pure transition liquid crystal phase in the temperature range of 20 to 100 ° C., but forms an isotropic solution phase in the temperature range of 40 to 100 ° C. or a dispersion of the concentration transition liquid crystal phase in a continuum of isotropic liquid. It characterized in that to form. Comparative examples of the case according to the present invention and the case outside the scope of the present invention are shown in Table 1.

a. Phase characterization:

Phase characterization of the composition was performed using optical polarization microscopy techniques. Droplets of the composition melt were placed on a microscope glass slide at an elevated temperature of about 80 ° C. and covered with a cover slip. The edge of the cover slip was sealed with a UV adhesive to minimize moisture loss. The glass slide was placed on the objective of a microscope equipped with a controlled heating / cooling device. The system was heated to 110 ° C. at a rate of 1 ° C. per minute. The temperature at which the isotropic liquid phase or dispersion thereof, or pure liquid crystal phase is formed is recorded.

The system was then cooled and solidified at a rate of 1 ° C. per minute to ensure that a pure liquid crystalline phase formed during cooling. The concentration transition liquid crystal phase is inherently anisotropic, so the refractive index varies depending on the orientation. In general, such birefringence systems change the polarization plane of polarization. Between crossed polarizers the isotropic liquid appears black, but the liquid crystal system is more transparent. For example, lamellar liquid crystal phases exhibit maltose cross or oil streaks (such as large noose), while hexagonal phases show non-geometric scalloped structures.

Several tissues of the same phase structure may be observed. Characteristic tissues of various concentration transition liquid crystal phases (and dispersions thereof) have been reported in the following literatures: (i) Robert rats. Laughlin, "The Aqueous Phase Behavior of surfactant", Academic Press, New York, 1994, pp. 538-542, (ii) d. "The Colloidal Domain Where Physics, Chemistry, Biology, and Technology Meet" by Fennel Evans, Hakan Benaststrom, VCH Publishers, New York, 1994, pp. 251 and 252.

b. Determination of Solids Content:

The low content NMR technique was used to determine the solids content in the detergent composition following the procedure described in the literature: Suresh M. Suresh M. Nadakatti, "Modified Data Handling for Rapid Low Field NMR Characterization of Lyotropic Liquid Crystal Composites", J. Surfactant and Detergents, Vol. 2, No. 4, pp. 515-521, 1999.

c. Manufacture of Detergent Tablet:

The melt of the detergent composition was poured into a rectangular mold of 75 mm (L) x 55 mm (W) x 40 mm (H) size at an elevated temperature of 80 ° C. A detergent tablet was obtained by cooling and solidifying the composition.

d. Yield Stress Measurement:

The detergent tablets were then placed in an oven maintained at 25 ° C. and 40 ° C. for 4 hours to equilibrate. The yield stress of the tablet at 25 ° C. and 40 ° C. was determined using an automated penetration tester according to the following procedure.

The automated penetration tester used for yield stress measurement was model PNR 10 (M / s Petrotest Instruments GmbH). A standard Hollow Cone (part # 18-0101, according to ASTM D 217-IP 50) was used with the Plunger (part # 18-0042) for the measurement. The cone consists of a brazed conical body and a hardened steel tip that can be separated. The total mass of cones was 102.5 g. The total mass of the movable plunger was 47.5 g. Thus, the total mass of cone and plunger applied on the detergent tablet was 150 g. An additional addition of 50 g and 100 g was also used (thus the total weight of the sample applied was 200 g and 250 g, respectively). The yield stress of the sample at 25 ° C. and 40 ° C. was measured using a standard procedure comprising the following steps:

1. The detergent tablet was placed on the table of the penetration tester.

2. The measurement device of the penetration tester was lowered to prevent the tip of the penetration tester from touching the tablet but passing through it.

3. The measurement was started by pressing the "Start" key.

4. The penetration depth shown on the display was read in mm.

5. Using the measured penetration depth, the yield stress of the detergent tablet was calculated using the following equation:

Where:

Yield stress is expressed in kPa,

m = total mass applied to the flat surface of the bar (kg)

g = acceleration of gravity (m / s ² )

p = penetration depth (mm)

θ = cone angle (30 °)

Tip Diameter = 0.359 mm

According to the above equation, the yield stress of the detergent tablet is> 75 kPa when the penetration depth measured for 200 g of total mass applied on the sample is <10 mm. The yield stress was measured three times for the total mass applied on the detergent tablet of 150 g, 200 g, and 250 g, and the average of the three values was used as the yield stress of the detergent tablet.

e. Examples of Detergent Tablet Compositions:

The data presented in Table 1 show that only the compositions described in Example 1.1 satisfying the phase properties according to the invention form a hard detergent tablet exhibiting a yield stress greater than 75 kPa. The compositions of Examples 1.2 and 1.3 are soft because they form a pure concentration transition liquid crystal phase in the temperature range of 35 to 75 ° C. and do not form an isotropic liquid phase or dispersion thereof in the temperature range of 40 to 100 ° C. In Example 1.4 the temperature at which the isotropic phase or dispersion thereof is formed during heating is within the range specified in the present invention, but during cooling the pure liquid crystalline phase was formed, resulting in a soft bar. This indicates that it is essential to meet both phase behavior criteria in order to obtain a bar with a firm and yield stress greater than 75 kPa.

ingredient Example 1.1 Example 1.2 Example 1.3 Example 1.4 Sodium stearate 15 15 12 16.2 Sodium lauryl ether sulfate - 10 10 - Cocobetaine 5 - - 10 water 80 75 78 73.8 Does the composition show a pure liquid crystalline phase in the temperature range of 20 ° C to 100 ° C? no Pure H1 ^* Phase (75-35 ℃) Pure H1 ^* Phase (75-35 ℃) Pure H1 ^* Phase (75-35 ℃) Does the composition form a dispersion of a concentration transition type liquid crystal phase in an isotropic liquid phase or an isotropic liquid phase continuum in the temperature range of 40 ° C to 100 ° C? Above 65 ℃ no no Above 80 ℃ Does the composition show the presence of solid crystals upon cooling? Yes Yes Yes Yes solid% 16.6 15 13 11.7 Yield Stress @ 25 ℃ (kPa) 266 55 54 47 ^* H1 is pure hexagonal liquid crystal phase.

Further examples of compositions exhibiting phase behavior according to the invention are shown in Table 2 and compositions exhibiting phase behavior not according to the invention are shown in Table 3. All examples in Table 2 form rigid tablets containing less than 20% solids but exhibiting a yield stress greater than 75 kPa at 25 ° C. In contrast, the examples described in Table 3 are smooth.

ingredient Example 1.5 Example 1.6 Example 1.7 Example 1.8 Example 1.9 Example 1.10 Example 1.11 Sodium stearate - - - - 13 - - Sodium palmitate 20 18 - - - - - Sodium myristate - - 20 25 6.6 - - Sodium laurate - - - 5 - 22.2 - Sodium hydroxystearate - - - - - - 21.5 Sodium ricinolate - - - - - - 11 Sodium lauryl ether sulfate - 6 - - - 5 - Sodium lauryl sulfate - - - - 6 - - Cocobetaine - - 8 - - - - Alpha olefin sulfonates 8 - - 8 - - 10 water 72 76 72 62 74.4 72.8 57.5 Does the composition show a pure liquid crystalline phase in the temperature range of 20 ° C to 100 ° C? no no no no no no no Does the composition form a dispersion of a concentration transition type liquid crystal phase in an isotropic liquid phase or an isotropic liquid phase continuum in the temperature range of 40 ° C to 100 ° C? Above 65 ℃ Example above 64 ℃ Example above 55 ℃ Example above 55 ℃ Example above 50 ℃ Example above 42 ℃ Above 80 ℃ Does the composition show the presence of solid crystals upon cooling? Yes Yes Yes Yes Yes Yes Yes solid% 20 19.2 13.1 18.6 17.6 9 17 Yield Stress @ 25 ℃ (kPa) 154 350 133 613 143 296 110

ingredient Example 1.12 Example 1.13 Example 1.14 Sodium stearate 7.7 - - Sodium palmitate 9.4 15 20 Sodium myristate - - - Sodium laurate - - 14 Sodium hydroxystearate - - - Sodium ricinolate - - 11 Sodium oleate - - 18.6 Sodium lauryl ether sulfate 8.6 10 - Sodium lauryl sulfate - - - Cocobetaine - - - Alpha olefin sulfonates - - - water 74.3 75 36.4 Does the composition show a pure liquid crystalline phase in the temperature range of 20 ° C to 100 ° C? Pure H1 ^* Phase (100-40 ℃) Pure H1 ^* phase (below 58 ℃) Pure H1 ^* phase (below 58 ℃) Does the composition form a dispersion of a concentration transition type liquid crystal phase in an isotropic liquid phase or an isotropic liquid phase continuum in the temperature range of 40 ° C to 100 ° C? no no no Does the composition show the presence of solid crystals upon cooling? Yes Yes Yes solid% 19.7 16.5 21.5 Yield Stress @ 25 ℃ (kPa) 49 73 <15 ^* H1 is pure hexagonal liquid crystal phase.

Example 2

How to manufacture a detergent tablet

According to the screening method described in Example 1, the fatty acid mixture corresponding to Examples 1.5-1.11 was placed in a two liter round bottom flask and mixed with a non-soap based detergent active ingredient and water. The batch temperature was raised to 80 ° C. An aqueous sodium hydroxide solution was added to the mixture to neutralize the fatty acids. The batch temperature was maintained at 80 ° C. to obtain a clear isotropic solution. The melt of the detergent composition was poured into a thermoformed polymer mold at 80 ° C. and the inlet of the mold was sealed. The mold was cooled to solidify the soap to obtain a sealed cast detergent tablet.

Claims (8)

a) 2 to 50% by weight saturated fatty acid soap comprising at least one C ₆ -C ₂₄ fatty acid salt, b) 2-40% by weight of the detergent active ingredient, and c) 30 to 80% by weight of water and optionally one or more liquid benefit agents Containing a solids content of less than 30% and exhibiting a yield stress greater than 75 kPa in a temperature range of 20 to 40 ° C., Dispersion of a concentration transition liquid crystal phase without forming a pure concentration liquid crystal phase in the temperature range of 20 to 100 ° C., forming an isotropic liquid phase in the temperature range of 40 to 100 ° C., or in a continuum of isotropic liquid Melt casting detergent composition to form. The melt casting detergent composition of claim 1, wherein water and optional liquid useful agent are present in the composition in an amount of 60 to 80 wt%. The melt cast detergent composition of claim 1 or 2, which is substantially free of additives selected from alcohols, propylene glycol and other polyols, and salting-in electrolytes. The melt cast detergent composition according to claim 1, wherein the detergent active ingredient is a non-soap based detergent. The melt casting detergent composition according to any one of claims 1 to 4, wherein the fatty acid soap is a sodium salt or a potassium salt of a fatty acid. The melt cast detergent composition according to any one of claims 1 to 5, wherein the liquid useful formulation is selected from moisturizers, wetting agents, softeners, sunscreens and anti-aging compounds. (i) preparing a melt of the detergent composition, (ii) pouring the melt into a mold suitable for obtaining the desired shape, and (iii) cooling the mold or leaving it to cool to prepare a solid detergent composition A method for producing a melt casting detergent composition according to any one of claims 1 to 6, comprising. 8. The method of claim 7, wherein step (ii) is (iia) substep of pouring the melt into a pre-molded polymer mold to obtain the desired shape, and (iib) detailed step of sealing the mold A method of producing a cast-in-packed solid detergent composition by including.