JPS598393B2 - cleaning composition - Google Patents

Description

[Detailed description of the invention] The present invention relates to cleaning compositions.

More specifically, it has excellent foaming power, cleansing power, and skin gentleness,
The present invention also relates to a liquid cleaning composition with improved heat resistance and light resistance. Liquid detergents, such as vegetable and tableware detergents, are required to have foaming power, detergency, skin gentleness, etc. as their basic performance.

In order to exhibit these various performances, alkylbenzene sulfonates, alkyl ether sulfates, α-olefin sulfonates, and the like are used as surfactants in cleaning compositions.

In particular, with alkyl ether sulfate, when the number of moles of alkylene oxide (ethylene oxide or propylene oxide) added is increased, the irritation decreases, and when the number of moles added is 3 or more, the irritation becomes extremely small. It has a contradictory characteristic that the foaming power deteriorates rapidly.

Therefore, in order to further enhance these various properties, an auxiliary active agent is used in addition to the surfactant as the main component.

Typical examples of these co-activators are tertiary amine oxides and higher fatty acid alkanolamides. especially,
Japanese Patent Publication No. 38-1989 states that when used in combination with tertiary amine oxide, cleaning power and foaming power are improved while suppressing skin irritation.
It is described in Japanese Patent Publication No. 3264 and Japanese Patent Publication No. 38-17467. In recent years, there has been a strong demand for detergents that are less rough on the hands, and detergent compositions with excellent foaming power, detergency, and skin gentleness that use a combination of the above-mentioned tertiary amine oxide and higher fatty acid alkanolamide components have also been put on the market. . However, cleaning compositions containing tertiary amine oxide,
When exposed to heat or light, it can become colored, change its hue, sometimes even change its pH, and even generate a bad odor.

In particular, such deterioration phenomenon is remarkable when tertiary amine oxide is used together with higher fatty acid alkanolamide. Therefore, preventing discoloration and discoloration of detergent compositions containing tertiary amine oxide, especially detergent compositions containing both tertiary amine oxide and higher fatty acid alkanolamide, has become a major issue. Therefore, the present inventors conducted intensive research to improve the heat resistance and light resistance of cleaning compositions containing tertiary amine oxide.
The present invention was completed based on the discovery that basic performance can be enhanced and heat resistance and light resistance can be improved by blending a tertiary amine oxide obtained by oxidizing a primary amine with hydrogen peroxide.

That is, the present invention provides cleaning power, ultra-foaming power, and skin gentleness characterized by containing a tertiary amine oxide obtained by oxidizing a tertiary amine with hydrogen peroxide in the presence of a hydroxypolycarboxylic acid or a salt thereof. The present invention provides a cleaning composition that has excellent properties and improved heat resistance and light resistance.

Tertiary amine oxide can be obtained by oxidizing a tertiary amine with hydrogen peroxide, but ``industrial tertiary amines are contaminated with heavy metals such as iron, which adversely affects this oxidation reaction.'' 41-14089), so
A chelating agent is added to inactivate this heavy metal contaminant.

Japanese Patent Publication No. 41-14089 discloses diethylenetriaminepentaacetic acid (hereinafter referred to as DETA) as a catalyst, Japanese Patent Publication No. 42-11042 discloses sodium pyrophosphate as a catalyst, and US Pat. No. 3,463,817 discloses an aminoacetic acid compound. ing. However, when tertiary amine oxides produced using conventionally disclosed chelating agents as catalysts are blended into cleaning compositions, they deteriorate the heat resistance and light resistance of the compositions.

Although it is not clear what the reason for this was, it was a hard fact. Surprisingly, however, when a tertiary amine oxide produced using hydroxypolycarboxylic acid or its salt as a catalyst is blended into a cleaning composition, it has no adverse effect on heat resistance and light resistance, and has extremely excellent heat resistance and light resistance. A cleaning composition having light resistance can be obtained.

This effect is remarkable in a system in which both components of tertiary amine oxide and higher fatty acid alkanolamide are used in combination. The hydroxypolycarboxylic acid according to the present invention includes:
Citric acid, tartaric acid, malic acid, etc. can be mentioned.

The tertiary amine oxide according to the present invention is a mono-long-chain alkyl di-short-chain alkyl amine oxide, and it does not matter whether the long-chain alkyl group is linear or branched.

The long chain alkyl group has 10 to 18 carbon atoms, preferably 12 to 15 carbon atoms. Short chain alkyl groups are methyl or ethyl groups. In addition, even a small amount of tertiary amine oxide is effective, and a large amount improves foaming power, but 5
If the amount is more than % by weight, the effect will not change, and if it is used more than that, the low-temperature stability of the composition will be deteriorated. Therefore, 0.5-5% by weight
is preferred. The tertiary amine oxide of the present invention is obtained by oxidizing a tertiary amine with hydrogen peroxide in the presence of a hydroxypolycarboxylic acid or a salt thereof, and there are no particular restrictions on other reaction conditions, but specific A typical synthesis example is as follows.

A mixture consisting of a tertiary amine, a hydroxypolycarboxylic acid or its salt in an amount of 0.01 to 5% by weight based on the tertiary amine, and water is heated with a 20 to 90% aqueous hydrogen peroxide solution while maintaining the temperature at 50 to 100°C. The mixture was added dropwise and stirring was continued for 3 to 10 hours to complete the reaction.

Examples of anionic surfactants that can obtain excellent effects by blending the tertiary amine oxide according to the present invention include alkyl (linear or branched) benzenesulfonic acid, alkyl (natural or synthetic, linear or branched chain) ether sulfate, α-olefin sulfonate, alkanesulfonate, alkyl sulfate, alkyl phenol ether sulfate, etc. Counter ions include alkali metals such as potassium and sodium, ammonium, and monoethanolamine, diethanolamine, Examples include alkanolamines such as triethanolamine.

Further, it may be partially substituted with magnesium. The content of anionic surfactant is 5 to 50% by weight, preferably 1
It is 0 to 30% by weight. Although not essential to the present invention, the higher fatty acid alkalamide, which can further enhance the basic performance of the cleaning agent when used together with the tertiary amine oxide, is a type of saturated or unsaturated fatty acid having 10 to 18 carbon atoms. Or it is a compound obtained from a mixture of two or more types and a monoetheramine or diethanolamine.

The effect is noticeable when the amount added is 4% or more, and although there is no negative effect if it is added too much, it is economically disadvantageous, so
10% is a preferred range. In addition to the above-mentioned components, the detergent composition of the present invention may contain other known components that are commonly added to detergent compositions.

For example, amphoteric surfactants, nonionic surfactants in amounts that do not impair the effects of the present invention, viscosity modifiers such as ethyl alcohol, glycerin, propylene glycol, inorganic salts, lower alkylbenzene sulfonates, urea, lower alkyl Sulfates, etc. A. Codrotropic agents, fragrances, anti-redeposition agents, preservatives, dyes, PH adjusters, fluorescent agents, oxygen or chlorine bleaches, foaming agents, ultraviolet absorbers, antioxidants, appearance A modifier (for example, a pearlizing agent, a clouding agent), etc. can be added as necessary. The present invention will be explained by the following examples, but the scope of the present invention is not limited to these examples. Example 1 The heat resistance and light resistance of the compositions shown in Table 1 containing tertiary amine oxides produced using various catalysts were examined.

The results are shown in Table-1. Synthesis example of tertiary amine oxide> lauryldimethylamine 222t (1.00 mol),
1.05y (0.005mol) of citric acid and 431t of water
into a 4-hour flask equipped with a stirrer, a thermometer, a dropping load, and a reflux condenser 2, stir and heat (60 to 7°C).
It took 3 hours to prepare 107 tons of 35% hydrogen peroxide aqueous solution (1
．． 10 mol) was added dropwise.

After the dropwise addition was completed, stirring was continued for 5 hours at 70-80°C, 10f7 of a 20% aqueous sodium hydroxide solution was added, and the mixture was stirred for 2 hours, and then 12 tons of 20% sulfuric acid was added and stirred for 10 minutes to complete the reaction. A viscous liquid of lauryldimethylamine oxide is obtained. Test method> (a) Fill a 300 ml transparent polyester bottle with the heat-resistant cleaning composition and leave it in a constant temperature room at 50° C. for 20 days.

After standing, observe the degree of coloring and hue with the naked eye. (B)
Prepare the same sample as for light resistance (a), expose it to a carbon arc (using a fade meter) for 48 hours, and then observe it with the naked eye.

Evaluation Example 2 The same tests as in Example 1 were conducted on the blended compositions shown in Table 2.

Claims (1)

[Claims] 1 In the presence of hydroxypolycarboxylic acid or its salt 3
A cleaning composition comprising a tertiary amine oxide obtained by oxidizing a primary amine with hydrogen peroxide.