JPS5837095A - Detergent composition - 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 The present invention relates to an Ij11Fi phosphorus-free detergent composition with good detergency.

Since it was pointed out that the cause of eutrophication of rivers, lakes, etc. is phosphates contained in synthetic detergents, several so-called phosphate-free detergents that do not contain phosphates have been developed in the industry. There is. A typical example is a phosphorus-free detergent containing synthetic zeolite.1 Synthetic zeolite has inferior performance as a t k f- compared to phosphate, so in detergents containing synthetic zeolite, a third component is added. Many attempts have been made to improve the detergency of detergents by adding them. However, to date, these conventional attempts have not necessarily yielded satisfactory results.

As a result of repeated research aimed at improving the detergency of phosphorus-free detergents containing synthetic zeolite, the present inventors found that an ether malate as described below was blended into a system containing an anionic surfactant and synthetic zeolite. It has been found that good cleaning power can be obtained. The ether malates used in the present invention are different from conventional chelates, although they are themselves soluble in water.

In the cleaning solution, a part of it reacts with calcium and magnesium ions, which are the hardness components in the solution, to form water-insoluble salts, which interact with the anionic surfactant and synthetic zeolite to create a stormy environment. It is estimated that this product has excellent cleaning performance.

As a reminder, 1% 1985-11679 proposes a detergent composition containing ether malate as an anionic surfactant; This detergent composition is said to have good detergency, but as can be seen from the examples below, this detergent composition has poor detergency compared to the detergent composition containing synthetic zeolite. .

The detergent composition of the present invention contains (a) 1 anionic surfactant.
0~3QWt91. (b) General formula: RO-CHCO
OMCH, COOM (wherein, R is a saturated or unsaturated hydrocarbon group having -10 to 2 carbon atoms, and 6L M is sodium, potassium, or ammonium) from 1 to 20
'1ttq4 and (C) 5-30wt of synthetic zeolite
% and substantially no salt.

In the present invention, the anionic surfactants that account for 10 to 30 wt% of the detergent composition include linear alkylbenzenesulfonic acids m, c, and m having alkyl groups of c, to Cts.
c0 aliphatic alcohol sulfate ester salt, C8-C□ aliphatic alcohol l diethylene glycol ether sulfate ester *C10-C□ α-olefin, vinylidene olefin and internal olefin sulfonate, α-sulfo fatty acid ester Both salts and soaps can be used, and each of these surfactants is preferably in the form of a Na salt or an X salt.

The ether malate of the present invention represented by the above general formula is
A method in which the OH group of malic acid is replaced with CI and then etherified by reaction with an alcohol.

Alternatively, it can be easily produced by preparing ether malic acid by reacting maleic acid diester or hafmaric acid diester with alcohol in the presence of an alkali catalyst, and then neutralizing this with caustic soda, caustic potash, or aqueous ammonia. be able to. In this case, the alcohol may be either saturated or unsaturated, and its carbon chain may be linear or branched. However, the chain length of the alcohol, and therefore the number of carbon atoms in the hydrocarbon group R in the above general formula, greatly influences the detergency of the composition of the present invention, and when this is less than 10, good cleaning is achieved. You can't expect power. Also, the number of carbon atoms is 2.
When it exceeds 0, the detergency also decreases due to the decrease in solubility of ether malate. Therefore, in the ether malate of the present invention, it is essential that the hydrocarbon group R has carbon atoms in the range of 10 to 20. The amount of ether malate is 1 to 20 wt per composition.
%.

Preferably, it is allowed to be 5 to 15 wt%. 20
It is not preferable that the content exceeds wt% because it causes deterioration of powder physical properties.

Preferably, the synthetic zeolite, which accounts for 5-3 Q wt% of the composition, has an ion exchange capacity of at least 100 mg Cab/1 g (dry basis) and an average particle size of 7 microns or less. If the ion exchange ability is poor, the ability to capture hard components in the cleaning solution is insufficient,
This is because as the average particle size becomes larger, adhesion to cloth is observed. Preferred synthetic zeolites are as described above.

It is commercially available under trade names such as "Jilton B" and "Surgyl".

In addition to the above-mentioned tertiary components, the phosphorus-free detergent composition of the present invention includes optional gelatin components such as sodium silicate, soda carbonate (soda ash), sodium sulfate (mirabilite), and sodium citrate.
Sodium malate.

Can it contain sodium succinate?

Enzymes, P+ anti-staining agents, anti-caking agents, foaming regulators.

It can also contain antioxidants, *stimulant 6 pigments, fragrances, etc.

Example (1) Preparation of soiled cloth For inorganic soil, clay mainly composed of crystalline minerals such as kaolinite and perbaculite was dried at 200"C for 130 hours and ground to an average particle size of 1 μm. Approximately 4
Dissolve 3.5 g of gelatin in 950 cc of water at 0°C, then add 0.25 g of Kazenbuhook, stir vigorously to disperse, and then dissolve 15 g of inorganic dirt and organic dirt sts.
g was added to disperse the emulsion. 10 c in this filth bath
m x 20 cm specified cleaning cloth (Yurekakyo-designated cotton cloth 6
After soaking No. 0, squeeze out the water with two rubber rolls,
The amount of dirt attached has been made uniform. 3 at 105℃
After drying for 0 minutes, both sides of the soiled cloth were rubbed 25 times, and this was cut into 5 C (n x 5 cm) pieces with a reflectance in the range of 42±2% to be used as soiled cloth.

Table 1 shows the soil composition of the soil cloth thus prepared.

(Left below) Fit -1 (2) Cleaning test U, 8. Testing's Terg-0-Tom@
Using ter, make a set of 10 pieces of the above dirty cloth and put it on the table.
In each detergent composition having the composition shown in 2.

Cleaning liquid concentration: 0.133%, liquid temperature: 25℃, water hardness
Washing was performed for 10 minutes at 3° DH and a bath ratio of 30 times, and the detergency of each detergent composition was evaluated using the following formula. The results are shown in the rightmost column of Table 2.

K/8- (1-R)”72 B・・・・・・(Kub
*Ika-Rank method] However, R: Reflectance (%) (The following is a margin) [Notes to Table 2] The fist indicates a comparative example.

■CI. ～C14 (Light chain alkyl sulfonate (average C1) ■ Sodium α-olefin sulfonate with CI4~01 (average C1g, ?) ■Polyoxyethylene alkyl ether sodium sulfate (C
8, ~ C engineering, l! 10P-3) ■The number in parentheses is the number of carbon atoms in the hydrocarbon group.

Claims (1)

[Claims] 1. (i) 10 to 3 Qwt of anionic surfactant. 1G-20 saturated or unsaturated hydrocarbon group. M is sodium, potassium or ammonium) containing 5 to 30 wt% of ether malate l to Q Q wt- and (C) synthetic zeolite, and does not contain phosphate. Detergent composition.