JPS62297400A - Detergent composition for tableware washing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] 3. Detailed description of the invention Limb disaster The present invention relates to cleaning compositions for automatic dishwashers.

q (In recent years, as laundry detergents have become phosphorus-free, there has been a strong demand for detergent compositions for automatic dishwashers to be phosphorus-free as well, in order to reduce their impact on the environment.) There is.

Various types of phosphorus-free cleaning compositions for automatic dishwashers have been proposed.

Combination of citric acid and low-foaming nonionic surfactant (JP-A-47-34802), combination of edible builder and fatty acid sucrose ester (JP-A-49-41405), alkali builder and soap A method of combining a non-phosphorous builder with a specific surfactant, such as a combination with a specific surfactant (Japanese Unexamined Patent Publication No. 61-2719), has been disclosed.

However, when combined with these surfactants, the foaming power causes foaming during cleaning, reducing the jetting pressure, and the lack of emulsifying and dispersing power of oil causes oil, etc. to adhere to the glass tip, resulting in poor finish quality. It had the disadvantage of lowering the

The present invention also provides a detergent composition for automatic dishwashers that has low foaming properties and effectively prevents contamination due to turning, even when it is a phosphorus-free composition that does not contain phosphates. It is something to do.

The present invention is characterized by containing the following components (A) and (B).

(A) Inorganic alkali builder.

(B) Internal olefin sulfonate having 20 to 24 carbon atoms.

The present invention will be explained in more detail below.

Specific examples of the inorganic alkali builder of component (A) include:
Alkali metal salts of carbonic acid such as sodium carbonate, potassium carbonate, and sodium bicarbonate.

Alkali metal salts of silicic acid having a ratio of M, O/5iO2 = 0.5 to 4 (M: alkali metal) can be mentioned.

(A) The inorganic alkali builder is used alone or in combination of two or more, and is added to a cleaning composition for automatic dishwashing.
It is appropriate to blend 0 to 90% by weight, preferably 20 to 40% by weight.

The internal olefin sulfonate of component (B) is
A neutralized product of a sulfonated internal olefin, containing a vinylene type monoolefin represented by the following general formula (1) as a main component, and optionally containing up to about 33% by weight of a trisubstituted monoolefin (C) IR=CCR It is produced by sulfonating an interolefin containing ``R'') with a sulfonating agent such as 803, neutralizing it with an appropriate base, and hydrolyzing it.

R-CH=CH-R' (1) (in the formula, R and R'' each represent a long-chain or branched saturated hydrocarbon group with 1 or more carbon atoms, and the number of carbon atoms between R and R' is The sum is 18
~22. ) The internal olefin sulfonate thus produced usually contains about 20 to 60% by weight of alkenyl sulfonate having double bonds.

About 80-40% by weight of hydroxyalkanesulfonate
while containing more than about 80% by weight of monosulfonates and less than about 20% by weight of disulfonates. Of course,
By appropriately selecting the sulfonation conditions and hydrolysis conditions, it is also possible to produce an internal olefin sulfonate having a composition different from the above-mentioned component ratios.

The internal olefin has 20 to 24 carbon atoms.

If the number of carbon atoms is less than 20, foaming will occur, and if it exceeds 24, the cleaning finish of the glass tip will deteriorate.

(B) Internal olefin sulfonate is added to the cleaning composition of the present invention in an amount of 0.1 to 30% by weight, preferably 1 to 30% by weight.
It is appropriate to add 5% by weight.

Even if it is blended in an amount exceeding 30% by weight, there is no particular improvement in performance.

Further, general chelate builders, enzymes, bleaching agents, pigments, fragrances, etc. can also be added to the cleaning composition of the present invention. Chelate builders other than phosphates include alkali metal salts of citric acid, malic acid, tartaric acid, ethylenediaminetetraacetic acid, and nitrilotriacetic acid.

According to the automatic dishwasher detergent composition of the present invention, the inorganic alkali builder and the internal olefin sulfonate having 20 to 24 carbon atoms are used together, so that they act mutually. In addition, it has low foaming properties, effectively prevents a decrease in cleaning power, and also prevents the occurrence of water spots, thereby achieving a good finish on glass products.

EXAMPLES Hereinafter, the effects of the present invention will be explained in more detail with reference to Examples. First, prior to each example, the test methods used in the examples will be described.

After adding 8 grams of cooked rice, 2 grams of beef tallow, and 10 grams of milk to a cleaning solution, four glass cups coated with 0.5 grams of butter on the inside were placed in an automatic dishwasher, washed, and evaluated based on the following evaluation method.

(i) Washing conditions 1) Dishwasher: A fully automatic dishwasher in which a detergent solution is sprayed from a rotating nozzle and dishes placed on the spray trajectory are washed.

2) Cleaning temperature: The automatically supplied tap water (15°C) is gradually heated by a heater during cleaning, and the temperature of the cleaning liquid at the end of cleaning is 60°C.

3) Cleaning agent concentration: 0.2% as two sets of acids.

4) Washing time 220 minutes.

5) Rinse: After supplying water, rinse for 1 minute and drain the water three times, then heat rinse once while raising the temperature to 60℃.
Let's go around.

6) Drying: After rinsing, set the temperature inside the dishwasher to 80℃.
Dry for 1 hour while gradually raising the temperature to .

(2) Foaming during washing After 10 minutes from the start of washing during washing, the washing was momentarily stopped, the foaming in the automatic dishwasher was measured, and a rating was given according to the following criteria.

0 points: 31 m+ or more 1 point: 21-30 m+ 2 points: 11-20 mm 3 points: 5-10 IIO 4 points: 1-51 m 5 points: 1 m or less After washing in the dishwasher, water spots on the surface of the glass tips were counted and evaluated based on the average number of four tips.

0 points: 50 or more 1 point: 31 to 49 2 points: 16 to 30 3 points = 9 to 15 4 points: 3 to 8 5 points = 2 or less Each composition shown in Example Table-1 A cleaning composition for automatic dishwashing was prepared, and the foaming during washing and the finish on glassware were evaluated.

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Claims (1)

[Claims] 1. A detergent composition for automatic dishwashers, characterized by containing an inorganic alkali builder and an internal olefin sulfonate having 20 to 24 carbon atoms.