JP7829287B2 - Liquid fragrance and cleaning agent composition for flush toilets - Google Patents

Description

This invention relates to a liquid fragrance and cleaning agent composition for flush toilets. More specifically, this invention relates to a liquid fragrance and cleaning agent composition for flush toilets that does not gel and is less susceptible to viscosity changes even when exposed to temperature changes or contact with water.

Liquid toilet cleaners are generally used in containers with a discharge hole. The liquid cleaner discharged from the container mixes with the flush water, allowing the toilet bowl to be cleaned during flushing. Conventionally, liquid toilet cleaners have been used in various forms, such as those installed above the hand-washing area of a toilet or attached to the rim of the toilet bowl. Such liquid toilet cleaners offer advantages in terms of ease of installation, simple toilet bowl cleaning, and easy monitoring of the remaining amount of cleaner, and are widely available today.

For liquid toilet cleaners, it is important to design them so that the amount dispensed from the container is consistent each time they are used, ensuring stable cleaning action with every use. In particular, the indoor space of a toilet generally experiences temperature fluctuations throughout the year. Such temperature changes can cause significant fluctuations in the viscosity of the liquid toilet cleaner or lead to gelation, resulting in fluctuations in the amount dispensed from the container and preventing the desired cleaning action from being achieved. Furthermore, while the liquid toilet cleaner is designed to be dispensed in an appropriate amount and mixed with flush water, flush water can inevitably flow back into the liquid toilet cleaner in the container. Because liquid toilet cleaners contain high concentrations of cleaning components, when flush water is mixed in in this way, it can cause changes in viscosity or gelation, resulting in uneven dispensing from the container each time. Therefore, conventional research has focused on formulations that can maintain a certain viscosity range without gelation, even when subjected to temperature changes or water contamination. For example, Patent Document 1 reports that a liquid cleaning composition containing a nonionic surfactant that is fluid at 20°C, a nonionic surfactant that is not fluid at 20°C, a polyoxyethylene polyoxypropylene block polymer, and water in specific ratios is less susceptible to viscosity changes due to temperature changes or the addition of water, and can suppress uneven discharge from containers. Furthermore, Patent Document 2 reports that a liquid fragrance cleaning composition containing 40-95% by weight of a polyoxyalkylene alkyl ether type nonionic surfactant of a specific structure and 5-60% by weight of a fragrance exhibits excellent cleaning action without gelling even when in contact with water over a wide temperature range, despite containing high concentrations of surfactant and fragrance. Moreover, Patent Document 3 reports that a liquid fragrance cleaning composition containing two specific types of polyoxyalkylene alkyl ether type nonionic surfactants along with a fragrance can solubilize fragrance components regardless of the type of fragrance component, and is less susceptible to viscosity changes without gelling even with temperature changes or the addition of water.

Japanese Patent Publication No. 2009-84456 Japanese Patent Publication No. 2004-182902 Japanese Patent Publication No. 2013-221119

Regarding liquid fragrance and cleaning agent compositions for flush toilets that are resistant to changes in physical properties due to temperature fluctuations and contact with water, useful technologies are described in Patent Documents 1 to 3. However, in order to diversify formulations, the development of new formulations is required.

Therefore, the present invention aims to provide a liquid fragrance and cleaning agent composition for flush toilets that does not gel and is less prone to viscosity changes even when exposed to temperature changes or water contamination.

The inventors of this invention conducted diligent research to solve the aforementioned problems and discovered that a liquid fragrance and cleaning agent composition for flush toilets, comprising (A) a polyoxyethylene alkyl ether type nonionic surfactant having an alkyl group with 11 to 15 carbon atoms and a cloud point greater than 80°C in a 1% by weight aqueous solution, and (B) a fragrance component, and having a viscosity of 60 to 800 mPa·s at 25°C, is less prone to gelation and viscosity changes even with temperature changes or the addition of water. This invention was completed by further research based on these findings.

In other words, the present invention provides inventions in the following embodiments.
Item 1. (A) Polyoxyethylene alkyl ether type nonionic surfactant represented by the following general formula (1), having a cloud point greater than 80°C in a 1% by weight aqueous solution.
[In general formula (1), ^R1 is a linear or branched alkyl group having 11 to 15 carbon atoms, EO is an oxyethylene group, and a is the average number of moles of EO added, where a ≥ 3.], and
(B) A liquid fragrance cleaning agent composition for flush toilets, containing a fragrance component and having a viscosity of 60 to 800 mPa·s at 25°C.
Item 2. The liquid fragrance and cleaning agent composition for flush toilets according to Item 1, further comprising (C) a polyoxyalkylene alkyl ether type nonionic surfactant represented by general formula (2).
[In general formula (2), R ² is a linear or branched alkyl group having 8 to 10 carbon atoms.
EO represents an oxyethylene group, PO represents an oxypropylene group, b is the average number of moles of EO added (b ≥ 5), c is the average number of moles of PO added (0 ≤ c), and [(EO) _b / (PO) _c ] indicates random or block addition of EO and PO.
Item 3. The liquid fragrance and cleaning agent composition for flush toilets according to item 1 or 2, further comprising (D) at least one cationic surfactant selected from the group consisting of a halide of trialkylbenzylammonium represented by the following general formula (3) and a trialkylammonium sulfate represented by the following general formula (4).
[In general formula (3), R ³¹ represents a linear or branched alkyl group having 8 to 18 carbon atoms, R ³² and R ³³ are the same or different linear or branched alkyl groups having 1 to 4 carbon atoms, and X represents a halogen atom.]
[In general formula (4), R ⁴¹ and R ⁴² are the same or different linear or branched alkyl groups having 6 to 18 carbon atoms, R ⁴³ and R ⁴⁴ are the same or different linear or branched alkyl groups having 1 to 4 carbon atoms, and R ⁴⁵ represents a linear or branched alkyl group having 1 to 4 carbon atoms or a hydrogen atom.]
Item 4. A liquid fragrance and cleaning agent composition for flush toilets according to any one of items 1 to 3, wherein in the general formula (1) above, a is 3 ≤ a ≤ 30.
Item 5. A liquid fragrance and cleaning agent composition for flush toilets according to any one of items 1 to 4, comprising 1 to 60% by weight of component (A) and 0.1 to 20% by weight of component (B).
Item 6. A liquid fragrance and cleaning agent composition for flush toilets, as described in any of Items 1 to 5, for use as an on-tank application in flush toilets.
Item 7. A liquid fragrance cleaning agent composition for flush toilets, as described in any of Items 1 to 5, for use on the rim of a flush toilet.

The liquid fragrance and cleaning agent composition for flush toilets of the present invention is less susceptible to viscosity changes even when exposed to temperature fluctuations caused by seasons, regions, etc., and is also less susceptible to viscosity changes even when water is mixed in. Therefore, it suppresses uneven discharge from the container and maintains a consistent discharge rate each time.

Furthermore, in one embodiment of the present invention's liquid fragrant and cleaning agent composition for flush toilets, all types of fragrance components can be solubilized regardless of their structure or properties. Therefore, by adopting a single basic formulation, it becomes possible to provide multiple types of liquid fragrant and cleaning agents for flush toilets with different fragrances. Consequently, in one embodiment of the present invention's liquid fragrant and cleaning agent composition for flush toilets, individual formulation design according to the type of fragrance component used becomes unnecessary, allowing for the simple provision of liquid fragrant and cleaning agent compositions for flush toilets exhibiting various fragrances, and making it easier to keep pace with the diversification of consumer preferences for fragrances.

The present invention provides a liquid fragrance and cleaning agent composition for flush toilets, characterized by comprising (A) a polyoxyethylene alkyl ether type nonionic surfactant having a specific structure with an alkyl group having 11 to 15 carbon atoms and a cloud point greater than 80°C in a 1% by weight aqueous solution, and (B) a fragrance component, and having a viscosity of 60 to 800 mPa·s at 25°C. The present invention provides a detailed description of the liquid fragrance and cleaning agent composition for flush toilets.

[(A) Polyoxyethylene alkyl ether type nonionic surfactant]
The liquid fragrant and cleaning agent composition for flush toilets of the present invention contains a polyoxyethylene alkyl ether type nonionic surfactant (sometimes referred to as component (A)) represented by the following general formula (1), having a cloud point of over 80°C in a 1% by weight aqueous solution. By using this specific polyoxyethylene alkyl ether type nonionic surfactant, the liquid fragrant and cleaning agent composition for flush toilets of the present invention can be made less prone to gelation and viscosity changes even with temperature changes or the addition of water.

In general formula (1), ^R1 represents a linear or branched alkyl group having 11 to 15 carbon atoms. Preferably, ^R1 is a branched alkyl group having 12 to 14 carbon atoms. Another preferred example of ^R1 in general formula (1) is a branched alkyl group represented by the following general formula (11).

In general formula (11), n and m are either the same or different integers greater than or equal to 0, and n + m is between 8 and 12, preferably between 9 and 11.

Furthermore, in general formula (1), EO represents an oxyethylene group. Also, 'a' represents the average number of moles of EO added, where a ≥ 3. The average number of moles of EO added, 'a', is preferably 3 ≤ a ≤ 30, more preferably 5 ≤ a ≤ 20, and even more preferably 8 ≤ a ≤ 15.

The component (A) used in this invention has the structure shown by the general formula (1) and has a cloud point greater than 80°C when prepared as a 1% by weight aqueous solution. Specifically, the cloud point of component (A) is 81 to 93°C, preferably 81 to 86°C, and more preferably 82 to 84°C. Here, the cloud point is determined by dissolving the surfactant to be measured in purified water at a concentration of 1% by weight and using the measurement method described in ISO 1065-1991.

The HLB value of component (A) used in this invention is not particularly limited, but for example, it can be 10.0 to 18.0, preferably 12.0 to 16.5, and more preferably 13.0 to 15.5. Here, the HLB value of component (A) is the value calculated by the Griffin method.

In the liquid fragrance and cleaning agent composition for flush toilets of the present invention, component (A) may be a single polyoxyethylene alkyl ether type nonionic surfactant satisfying the above structure and cloud point, or two or more may be used in combination.

In the liquid fragrance and cleaning agent composition for flush toilets of the present invention, the content of component (A) is, for example, 1 to 60% by weight, preferably 10 to 50% by weight, and more preferably 20 to 40% by weight.

[(B) Fragrance]
The liquid fragrant cleaning agent composition for flush toilets of the present invention contains, in addition to component (A), a fragrance component (sometimes simply referred to as component (C)). By including the fragrance component in this way, a desired fragrance can be imparted to the toilet space.

The type of fragrance component contained in the liquid fragrant cleaning agent composition for flush toilets of the present invention may be appropriately selected according to the desired fragrance. Examples include natural fragrances, as well as synthetic fragrances such as hydrocarbon fragrances, ether fragrances, ester fragrances, alcohol fragrances, aldehyde fragrances, and ketone fragrances.

These fragrance components may be used individually as single fragrances, or two or more may be combined to create a blended fragrance that exhibits a desired scent.

In the liquid fragrance cleaning agent composition for flush toilets of the present invention, the content of component (B) can be appropriately set according to the type of component (B) and the strength of the fragrance to be provided, but for example, 0.1 to 20% by weight, preferably 1 to 15% by weight, more preferably 2 to 15% by weight, and even more preferably 4 to 15% by weight is a possible value.

[(C) Polyoxyalkylene alkyl ether type nonionic surfactant]
The liquid fragrance and cleaning agent composition for flush toilets of the present invention may contain, in addition to components (A) and (B), a polyoxyalkylene alkyl ether type nonionic surfactant represented by the following general formula (2) (sometimes referred to as component (C)). When the liquid fragrance and cleaning agent composition for flush toilets of the present invention further contains component (C), it becomes possible to more effectively suppress changes in physical properties due to temperature changes and the mixing of water.

In general formula (2), ^R2 represents a linear or branched alkyl group having 8 to 10 carbon atoms. Preferably, ^R2 is a branched alkyl group having 8 to 10 carbon atoms, more preferably a branched alkyl group having 10 carbon atoms, and particularly preferably an isodecyl group.

In general formula (2), EO represents an oxyethylene group. b represents the average number of moles of EO added, where b ≥ 5. The average number of moles of EO added, b, is preferably 5 ≤ b ≤ 40, and more preferably 5 ≤ b ≤ 30.

Furthermore, in general formula (2), PO represents an oxypropylene group. Also, c represents the average number of moles of PO added, where 0 ≤ c. The average number of moles of PO added, c, is preferably 0 ≤ c ≤ 40, and more preferably 0 ≤ c ≤ 30.

Furthermore, in general formula (2), [(EO) _a / (PO) _b ] represents the random addition or block addition of EO and PO.

The cloud point of component (C) used in this invention, when prepared as a 1% by weight aqueous solution, is not particularly limited, but for example, it is 85°C or lower, preferably 50 to 85°C, and more preferably 55 to 80°C. Here, the cloud point is determined by dissolving the surfactant to be measured in purified water at a concentration of 1% by weight and using the measurement method described in ISO 1065-1991.

The HLB value of component (C) used in this invention is not particularly limited, but for example, it is 16.0 or less, preferably 12.0 to 16.0, and more preferably 13.0 to 15.5. Here, the HLB value of component (C) is the value calculated by the Griffin method.

In the liquid fragrance and cleaning agent composition for flush toilets of the present invention, component (C) may be selected from among polyoxyalkylene alkyl ether type nonionic surfactants represented by general formula (2) and used alone, or two or more may be used in combination.

In the liquid fragrance and cleaning agent composition for flush toilets of the present invention, when component (C) is included, its content is not particularly limited, but for example, it is 0.1 to 50% by weight, preferably 1 to 40% by weight, and more preferably 10 to 30% by weight.

[(D) Cationic surfactants]
The liquid fragrant and cleaning agent composition for flush toilets of the present invention may contain, in addition to components (A) and (B), at least one cationic surfactant (sometimes referred to as component (D)) selected from the group consisting of a halide of trialkylbenzylammonium represented by the following general formula (3) and a trialkylammonium sulfate represented by the following general formula (4). When the liquid fragrant and cleaning agent composition for flush toilets of the present invention further contains component (D), it becomes possible to more effectively suppress changes in physical properties due to temperature changes and the mixing of water.

In general formula (3), R ³¹ represents a linear or branched alkyl group having 8 to 18 carbon atoms. Preferably, ^{R 31} is a linear or branched alkyl group having 10 to 18 carbon atoms, more preferably a linear or branched alkyl group having 14 to 18 carbon atoms, and even more preferably a linear alkyl group having 14 to 18 carbon atoms.

In general formula (3), R ³² and R ³³ are the same or different, representing linear or branched alkyl groups having 1 to 4 carbon atoms. Preferably, R ³² and R ³³ are linear alkyl groups having 1 to 3 carbon atoms, more preferably a methyl group or an ethyl group, and even more preferably a methyl group.

In general formula (3), X represents a halogen atom. Preferably, X is a chlorine atom or a bromine atom, more preferably a chlorine atom.

In general formula (4), R ⁴¹ and R ⁴² are the same or different, representing a linear or branched alkyl group having 6 to 18 carbon atoms. Preferably, ^{R 41} and R ⁴² are linear or branched alkyl groups having 6 to 14 carbon atoms, more preferably linear or branched alkyl groups having 8 to 12 carbon atoms, even more preferably linear alkyl groups having 8 to 12 carbon atoms, and particularly preferably decyl groups.

In general formula (4), R ⁴³ and R ⁴⁴ are the same or different, representing linear or branched alkyl groups having 1 to 4 carbon atoms. Preferably, R ⁴³ and R ⁴⁴ are linear alkyl groups having 1 to 3 carbon atoms, more preferably a methyl group or an ethyl group, and even more preferably a methyl group.

In general formula (4), R ⁴⁵ represents a linear or branched alkyl group having 1 to 4 carbon atoms or a hydrogen atom. Preferably, ^{R 45} is a linear alkyl group having 1 to 3 carbon atoms, more preferably a methyl group or an ethyl group, and even more preferably a methyl group.

In the liquid fragrance and cleaning agent composition for flush toilets of the present invention, component (D) may be selected from a halide of trialkylbenzylammonium represented by general formula (3) and a trialkylammonium sulfate represented by general formula (4) and used alone, or two or more may be used in combination.

In the liquid fragrance and cleaning agent composition for flush toilets of the present invention, when component (D) is included, the amount can be appropriately set depending on the type of component (D) used, but for example, 0.1 to 40% by weight, preferably 1 to 30% by weight, and more preferably 10 to 30% by weight is used.

[water]
The liquid fragrance and cleaning agent composition for flush toilets of the present invention may contain water as a base component. When water is included in the liquid fragrance and cleaning agent composition for flush toilets of the present invention, the amount is not particularly limited, but for example, it is 0.1 to 80% by weight, preferably 1 to 70% by weight, and more preferably 2 to 60% by weight.

[Solubilizer]
Furthermore, the liquid fragrance and cleaning agent composition for flush toilets may optionally contain a solubilizer. Including a solubilizer makes it possible to impart good solubility and dispersibility to the various components. The solubilizer used in the present invention is not particularly limited, but examples include propylene glycol, ethylene glycol, ethanol, dipropylene glycol, glycerin, 2-methoxyethanol, 2-ethoxyethanol, 3-methoxy-3-methylbutanol, and the like.

When a solubilizing agent is included in the liquid fragrance and cleaning agent composition for flush toilets of the present invention, the content of the solubilizing agent is not particularly limited, but for example, it is 0.1 to 40% by weight, preferably 1 to 35% by weight, and more preferably 5 to 30% by weight.

[Other additives]
The liquid fragrance and cleaning agent composition for flush toilets may further contain, as necessary, appropriate amounts of additives such as enzymes, disinfectants, chelating agents, colorants, pigments, deodorants, emulsifiers and solubilizers for oily components, bulking agents, solubility modifiers, bleaching agents, water repellents, hydrophilic agents, fillers, pH adjusters, thickeners, moldability improvers, lubricants, buffers, turbidity enhancers, defoaming agents, antioxidants, and ultraviolet absorbers.

[viscosity]
The liquid fragrant and cleaning agent composition for flush toilets of the present invention satisfies a viscosity of 60 to 800 mPa·s at 25°C. By satisfying this viscosity range, even when subjected to temperature changes or the addition of water, the viscosity can be maintained within a range that allows for uniform discharge from the container each time, thereby providing properties suitable for a liquid toilet cleaner.

The viscosity of the liquid fragrance cleaning agent composition for flush toilets of the present invention at 25°C is preferably 60 to 800 mPa·s, more preferably 70 to 600 mPa·s, and most preferably 80 to 300 mPa·s. Here, the viscosity in the range of less than 100 mPa·s is measured using a B-type viscometer (TV-10 model, manufactured by Toki Sangyo Co., Ltd.) with a SPINDLE No-M1 rotor at a rotation speed of 30 rpm at 25°C, and the viscosity in the range of 100 mPa·s or more is measured using a B-type viscometer (TV-10 model, manufactured by Toki Sangyo Co., Ltd.) with a SPINDLE No-M2 rotor at a rotation speed of 30 rpm at 25°C.

[Usage Pattern]
The liquid fragrant cleaning agent composition for flush toilets of the present invention may be applied directly to the toilet bowl to be cleaned and used for cleaning, but it is preferable to dilute it with flush water and use it to clean the toilet bowl with flush water during flushing of the toilet. When using the liquid fragrant cleaning agent composition for flush toilets of the present invention diluted with flush water, the dilution ratio is not particularly limited, but for example, it is about 10,000 to 1,000,000 times, preferably about 20,000 to 500,000 times.

When the liquid fragrant and cleaning agent composition for flush toilets of the present invention is used diluted with flush water, the liquid fragrant and cleaning agent composition for flush toilets of the present invention may be used as a cleaning agent for the on-tank of the flush toilet, or as a cleaning agent for the rim. Here, the cleaning agent for the on-tank is used by being installed above the hand-washing area of the flush toilet, and the cleaning agent works by having the liquid fragrant and cleaning agent composition flow out of the container when it comes into contact with the flush water supplied to the hand-washing area, and the flush water containing the dissolved liquid fragrant and cleaning agent composition is released into the toilet bowl. The cleaning agent for the rim is used by being attached to the rim of the flush toilet, and the cleaning agent works by having the liquid fragrant and cleaning agent composition flow out of the container when it comes into contact with the flush water released into the toilet bowl, and the flush water containing the dissolved liquid fragrant and cleaning agent composition is released into the toilet bowl.

According to the liquid fragrance cleaning agent composition of the present invention, the non-uniformity of discharge due to temperature changes, etc., is improved. Therefore, even when used as a cleaning agent for the on-tank or rim of a flush toilet, the temperature of the flush water flushed together is not limited within a normal range, and cold or hot water can also be used.

When the liquid fragrance cleaning agent composition of the present invention is used as a cleaning agent for the on-tank or rim of a flush toilet, the container for containing the liquid fragrance cleaning agent composition is not particularly limited in structure, provided that it has a storage section for containing the liquid fragrance cleaning agent composition and a discharge hole for discharging the liquid fragrance cleaning agent composition to the outside of the container, and that when the container comes into contact with water, the liquid fragrance cleaning agent composition in the storage section can be discharged to the outside of the container through the discharge hole. Conventional containers for cleaning agents used on the on-tank or rim of a flush toilet can be used. For example, the structure of a container for a cleaning agent used on the on-tank is disclosed in Japanese Patent Publication No. 2004-300861, Japanese Patent Publication No. 2006-283539, Japanese Patent Publication No. 2006-283540, etc. Furthermore, the structure of containers for cleaning agents used on the rim is disclosed in Japanese Patent Publication No. 2003-517124, Japanese Patent Publication No. 2009-57769, Japanese Patent Publication No. 2010-242480, etc. However, the structure of the container for containing the liquid fragrance cleaning agent composition of the present invention is not limited to these containers, as long as it can be used for on-tank or rim applications.

The present invention will be described below with reference to examples, but the present invention is not limited to these examples.

Test Example 1
Using the surfactants shown in Table 1 and the fragrances shown in Table 2, predetermined amounts of each component shown in Tables 3 and 4 were mixed to prepare liquid toilet fragrance and cleaning compositions. For each liquid toilet fragrance and cleaning composition, the solubilization state of the fragrance components at 25°C, viscosity at 25°C, viscosity at 5°C, and whether or not gelation occurred at 5°C after mixing with water were measured under the following conditions.

<Viscosity at 25°C>
The viscosity of each liquid toilet air freshener and cleaning agent composition was measured using a Type B viscometer (TV-10 model, manufactured by Toki Sangyo Co., Ltd.) at 25°C and a rotation speed of 30 rpm. For viscosity ranges below 100 mPa·s, the SPINDLE No-M1 rotor was used, and for viscosity ranges of 100 mPa·s or more, the SPINDLE No-M2 rotor was used.

<Viscosity at 5°C>
Except for changing the temperature to 5°C, the measurement was performed under the same conditions as the viscosity measurement at 25°C described above.

<Presence or absence of gelation at 5°C after mixing with water>
80 g of each toilet liquid fragrance and cleaning agent composition was mixed with 20 g of water, and then allowed to stand at a temperature of 5°C. Afterward, the presence or absence of gelation was visually confirmed, and for those that did not gel, the viscosity was measured at 5°C. The measurement conditions were the same as those for the viscosity measurement at 25°C, except that the temperature was changed to 5°C. The obtained results were classified according to the following criteria.
Judgment criteria
○: No gelation is observed, and the viscosity at 5°C is less than 1000 mPa·s.
△: No gelation is observed, and the viscosity at 5°C is between 1000 mPa·s and 5000 mPa·s.
×: Gelation was observed, or the viscosity at 5°C was 5000 mPa·s or higher.

<Solubilization state of fragrance components at 25°C>
To evaluate the appearance of each liquid toilet air freshener and cleaning agent composition at 25°C, a 500 mL transparent glass beaker with a diameter of 92 mm was placed on a white piece of paper with black lettering (20 mm vertically, 20 mm horizontally) printed on it. 500 g of each liquid toilet air freshener and cleaning agent composition at 25°C was placed in the glass beaker, and the black lettering was visually observed from the top surface of the glass beaker. The state of solubilization of the fragrance components in each liquid toilet air freshener and cleaning agent composition was evaluated according to the following criteria.
Judgment criteria
○: Completely transparent, black text is clearly legible. △: Slightly opaque, black text is slightly blurred. ×: Completely opaque, black text is illegible.

The results obtained are shown in Tables 3 and 4. In formulations containing the polyoxyethylene alkyl ether type nonionic surfactant shown in general formula (1) and a fragrance, all types of fragrances could be solubilized. Furthermore, the viscosity at low temperatures (5°C) remained within the range of 300 to 1000 mPa·s, and viscosity changes were suppressed without gelation even when exposed to temperature changes. In particular, when the formulation included the polyoxyalkylene alkyl ether type nonionic surfactant shown in general formula (2), the cationic surfactant shown in general formula (3), and/or the cationic surfactant shown in general formula (4) in addition to the polyoxyethylene alkyl ether type nonionic surfactant shown in general formula (1), the increase in viscosity at low temperatures (5°C) was more effectively suppressed. In contrast, when a polyoxyalkylene alkyl ether type nonionic surfactant that does not correspond to the polyoxyethylene alkyl ether type nonionic surfactant shown in general formula (1) was used, gelation occurred at low temperatures (5°C) or with the addition of water, failing to satisfy the properties required for a liquid toilet cleaner.

Claims (6)

(A) Polyoxyethylene alkyl ether type nonionic surfactant represented by the following general formula (1), having a cloud point greater than 80°C in a 1% by weight aqueous solution.
[In general formula (1), ^R1 is a linear or branched alkyl group having 11 to 15 carbon atoms, EO is an oxyethylene group, and a is the average number of moles of EO added, where a ≥ 3. ]
( B) Fragrance components, and
(D) A liquid fragrance and cleaning agent composition for flush toilets, comprising at least one cationic surfactant selected from the group consisting of a halide of trialkylbenzylammonium represented by the following general formula (3) and a trialkylammonium sulfate represented by the following general formula (4) , and having a viscosity of 60 to 800 mPa·s at 25°C.
[In general formula (3), R ³¹ represents a linear or branched alkyl group having 8 to 18 carbon atoms, R ³² and R ³³ are the same or different linear or branched alkyl groups having 1 to 4 carbon atoms, and X represents a halogen atom.]
[In general formula (4), R ⁴¹ and R ⁴² are the same or different linear or branched alkyl groups having 6 to 18 carbon atoms, R ⁴³ and R ⁴⁴ are the same or different linear or branched alkyl groups having 1 to 4 carbon atoms, and R ⁴⁵ represents a linear or branched alkyl group having 1 to 4 carbon atoms or a hydrogen atom.] Furthermore, the liquid fragrance and cleaning agent composition for flush toilets according to claim 1, further comprising (C) a polyoxyalkylene alkyl ether type nonionic surfactant represented by general formula (2).
[In general formula (2), R ² is a linear or branched alkyl group having 8 to 10 carbon atoms.
EO represents an oxyethylene group, PO represents an oxypropylene group, b is the average number of moles of EO added (b ≥ 5), c is the average number of moles of PO added (0 ≤ c), and [(EO) _b / (PO) _c ] indicates random or block addition of EO and PO. A liquid fragrance and cleaning agent composition for flush toilets according to claim 1 or 2 , wherein in the general formula (1) above, a is 3 ≤ a ≤ 30. A liquid fragrance and cleaning agent composition for flush toilets according to any one of claims 1 to 3 , comprising 1 to 60% by weight of component (A) and 0.1 to 20% by weight of component (B). A fragrant cleaning agent composition for flush toilets according to any one of claims 1 to 4 , which is used for on-tank use in flush toilets. A fragrant cleaning agent composition for flush toilets according to any one of claims 1 to 4 , which is used for the rim of a flush toilet.