JPS609558B2 - liquid cleaning composition - Google Patents

Description

Detailed Description of the Invention: Combining a sulfonate-type and/or sulfate-type anionic surfactant (hereinafter referred to as S-type anionic surfactant) and a semipolar nonionic surfactant such as flukylamine oxide or fatty acid alkanolamide to improve detergency and It is well known that detergents with excellent foaming properties can be prepared, and compositions based on these combinations are disclosed in Japanese Patent Publication No. 39-1, for example.
It has also been proposed in Japanese Patent Application Laid-open No. 497y, Japanese Patent Application Laid-Open No. 50-9602, Japanese Patent Application Laid-open No. 76106-1982, and Japanese Patent Application Publication No. 53-49004.

Among the above combinations, the present invention uses an S-based anionic surfactant in an amount of 1% to 24% by weight and an average carbon number of 10 to 24% by weight.
1% to 5% by weight of an alkylamine oxide having at least one straight mirror alkyl group of 16, average carbon number 10
It has been found through experiments that compositions containing 2% to 1% by weight of a fatty acid alkanolamide of -16 have particularly excellent detergency and foaming properties.

The combination of the S-based anion activator and fatty acid alkanolamide described in the above-mentioned published patent specification, or the S
The combination of S-type anionic activator and alkylamine oxide shows little discoloration during storage at relatively high temperatures and direct sunlight exposure tests, and does not impair commercial value. Liquid detergents containing the three components of fatty acid alkanolamide and fatty acid alkanolamide can be stored at relatively high temperatures or exposed to direct sunlight, although the degree of damage will vary depending on the combination.
There is a problem in that the product undergoes significant discoloration and takes on a reddish brown color, which seriously reduces its commercial value.

The gist of the present invention is to further include 0.1 to 1% by weight of alkali citric acid in the combination of the new active agents specified above, thereby creating a composition suitable for non-discoloring liquid cleaning agents and kitchen cleaning agents. It is something that has succeeded in obtaining something. Many substances are known as discoloration or discoloration inhibitors for cleaning agents, and are appropriately selected and used depending on the discoloration or discoloration mechanism. However, the reason for the discoloration of the activator composition of the invention is not clear. Therefore, the present inventors first attempted to prevent discoloration using an antioxidant, but nothing was found to be effective. Therefore, among the various chelating agents that are currently added to cleaning compositions, it was found that only condensed sodium citrate exhibited an effect of preventing discoloration. Therefore, the present invention combines specific amounts of three types of surfactants and specific amounts of sodium citrate. be a sign. Examples of the surfactants used in the present invention include "S-based anionic surfactants such as lauryl sulfate ester," lauryl ethoxy (3 mole addition) sulfate, C,3-C,5 alkyl ethoxy (5 mole addition) sulfuric acid. Esther, C, o~
Examples include salts of Na, K, or Mg such as C,6 alpha olefin sulfonic acid, C,2 alkylbenzene sulfonic acid, and Q-sulfofatty acid methyl ester, and the amount used is 1% or more by weight of the total amount and approximately 35% by weight. Although up to 24% by weight may be used in practice.

Examples of alkylamine oxides include dodecyldimethylamine oxide, tetradecyldimethylamine oxide, hexadecyldimenalamine oxide, dodecyldiethylamine oxide, and tridecyldimethylamine oxide, and the amount used is 2% by weight or more. Up to about 5% by weight. Furthermore, fatty acid alkanolamides include, for example, coconut fatty acid jetanolamide, lauric acid jetanolamide, myristic acid jetanolamide,
Examples include myristic acid jetanolamide, coconut fatty acid monoethanolamide, lauric acid monoethanolamide, and the amount used is from 2% by weight to about 10% by weight. It should be noted that the compounds exemplified above are merely examples, and the present invention is of course not limited thereto. The amount of sodium citrate used is 0.1% by weight to 1%
It is 0.0% by weight, but the stability of color tone can be obtained at 0.5% by weight.
This is because it is from about 1% by weight, and adding 1% by weight or more is not very meaningful.

Since the composition of the present invention is a liquid cleaning composition suitable for kitchen use, most of the remaining components other than the surfactant are water, but fragrances, pigments, and other general ingredients are necessary. The tertiary substance may be added as appropriate depending on the
This does not preclude the combined use of surfactants.

The effects of the present invention will be specifically clarified by Examples (including comparative examples) below. Example 1 Sodium alkyl ethoxysulfate ester (C,2-,3,
EOP=3) 20%, dodecyldimethylamine oxide 2.5%, coconut fatty acid jetanolamide 3%, ethanol 3%, xylene sodium sulfonate 3%, balance water, and the following additives were added to the composition. High temperature stability and light resistance were evaluated.

However, in this example, % is by weight. Evaluation method 1 A high temperature stable liquid detergent was filled into a 100ml glass bottle, the glass bottle was covered with aluminum foil to shield it from light, and then stored in a temperature bath at 45°C for 30 days, and the degree of discoloration was determined.

2. Light resistance test: Fill 200 [Customer's transparent polyethylene terephthalate bottles] with liquid detergent and use Toyo Seiki No. The degree of discoloration was determined by continuous light irradiation for 20 days using a 736 standard weathering tester (light resistance tester using a carbon arc lamp).

In both test methods, discoloration was determined visually by the degree to which the stock solution of the liquid detergent took on a reddish tinge, and the following evaluations were made.

○: No discoloration was observed compared to the liquid color before starting the stability test, and no reddish tinge was observed.

△: The liquid color is slightly reddish compared to the color before starting the stability test.

×: Compared to the liquid color before starting the stability test, the color has clearly changed to brownish brown.

Example 2 Sodium alkyl ethoxysulfate ester (C,2-,3,
EOP=3) 15% C,4 alpha olefin sodium sulfonate 5%, dodecyldimethylamine oxide 2.5
%, sodium xylene sulfonate 3%, ethanol 3%,
Compositions containing 3% of coconut fatty acid jetanolamide and varying amounts of sodium citrate were prepared and evaluated for high temperature stability and light resistance.

Note that the remainder is water. Example 3 An outdoor exposure test was conducted for one month from April to May in Kagoshima City, where the following liquid detergent was prepared and where the sunlight is strong and the temperature is relatively high even under the harsh conditions of Japan.

(Liquid detergent was tested by filling it into a transparent bottle made of polyethylene terephthalate.) Note: 1st modification 2 is an example, pig 1 is a comparative example Note: 2 sample pig 1 discolored to brown, while sample 2nd modification There is no discoloration at all.

Claims (1)

[Claims] 1 10 to 24% by weight of sulfonate type and/or sulfate type anionic surfactant, average carbon number 10 to
1% to 5% by weight of an alkylamine oxide having at least one straight chain alkyl group of 16, average carbon number 10
1. A liquid cleaning composition comprising 2% to 10% by weight of a fatty acid alkanolamide of No. 16, and 0.1 to 1% by weight of sodium citrate as a discoloration inhibitor.