JPS6012000B2 - Low foam cleaning composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a detergent composition that has low foaming properties and excellent detergency.

Traditionally, water was thought to be inexhaustible, but in recent years,
Due to changes in lifestyles and modernization, water is becoming scarce, and this is beginning to have a slight impact on daily life.

Due to these social conditions, rotating drum type washing machines that promote water conservation have recently been attracting attention. Unlike jet type washing machines, rotary drum type washing machines wash on the principle of beating, so if foam is generated during washing, the foam acts as a cushion and weakens the mechanical force, resulting in a decrease in cleaning power.

Therefore, detergents suitable for this type of washing machine include:
Low foaming was an essential condition. Conventionally, silicone-based antifoaming agents have been used, but
This product has problems with stability in detergents, loses its antifoaming effect when stored for a long period of time, and is also expensive.

Additionally, since it is water-insoluble, it has the disadvantage of adhering to the items to be washed. The present invention was made to eliminate the above-mentioned drawbacks, and an object of the present invention is to provide a cleaning composition that has low foaming properties and excellent cleaning power without using a special antifoaming agent. As a result of extensive research, the present inventors have found that by blending specific amounts of a specific anion activator, a specific polyoxyethylene polyoxypropylene alkyl ether, and a specific metal salt of a fatty acid, It was discovered that a product with low foaming properties and excellent detergency could be obtained, and based on this knowledge, the present invention was completed. That is, the low foaming detergent composition of the present invention contains the following components {a' having 12 to 2 carbon atoms;
One or more anionic activators selected from the group of 4Q olefin sulfonates, straight mirror alkylbenzene sulfonates whose alkyl groups have 10 to 15 carbon atoms, and alkyl sulfates whose alkyl groups have 10 to 15 carbon atoms. 9
Polyoxyethylene polyoxypropylene alkyl ether and 'c having ~15 alkyl groups, the number of added moles of ethylene oxide is 5 to 20, and the number of added moles of propylene oxide is 2 to 8. - 5 to 25 weight percent, 3 to 1 weight percent, and 2 to 7 weight percent of alkali metal salts of fatty acids containing 3 ton weight percent or more of alkali metal salts of unsaturated fatty acids having one or more double bonds, respectively; Contains percent 'a}
The weight ratio 'a-/'b) between and {b' is in the range of 6/1 to 1/1, and the polymerization ratio between [b} and [c} {b}/{
c) is in the range of 4/1 to 1/2.

The present invention will be explained in more detail below.

The Q olefin sulfonate in 'a) has a carbon number of 12 to impart satisfactory cleaning power to the cleaning composition.
Must be in the range of ~24. This type of Q-olefin sulfonate is produced by converting Q-olefin having 12 to 24 carbon atoms obtained by a wax cracking method, an ethylene polymerization method using a Ziegler catalyst, or an improved method thereof using, for example, a thin film sulfonation device. , gaseous S03
It can be produced by sulfonating with alkali, followed by neutralization and hydrolysis with a caustic alkali to form an alkali salt. The Q-olefin sulfonates thus obtained include monosulfonates and disulfonates, and the monosulfonates include alkenesulfonates and hydroxyalkanesulfonates. Linear alkylbenzene sulfonates in which the alkyl group of {a} has 10 to 15 carbon atoms can be prepared using a wax thermal decomposition method, a dehydrochlorination method after chlorination of n-paraffins, a dehydrogenation method, or an ethylene polymerization method using a Ziegler catalyst. A linear alkylbenzene is obtained from benzene and a chlorinated paraffin obtained by chlorinating a legally obtained n-olefin having 10 to 15 carbon atoms or n-paraffin, and this is processed using fuming sulfuric acid or a thin film sulfonation device. It can be produced by sulfonating with gaseous S03 and then neutralizing it to form an alkali salt.

In addition, alkyl sulfates having 10 to 15 carbon atoms in 'a' can be prepared by {1'' high-pressure catalytic reduction method for oils and fats such as chassis oil ■ oxo method for olefins '3} Ziegler method for ethylene, etc. It can be produced by obtaining a higher alcohol of No. 15, sulfating it with gaseous S03 using a thin film sulfation apparatus, and neutralizing it to form a sulfate ester salt.

Polyoxyethylene polyoxypropylene alkyl ether, which is the 'b' component, is produced by converting ethylene oxide and It can be produced by a known method of adding propylene oxide. These alkylene oxides may be added by first adding a block of ethylene oxide and then adding a block of propylene oxide, or by adding ethylene oxide and propylene oxide to the reaction system simultaneously and adding them randomly. The former method is preferable. The alkali metal salts of fatty acids containing 3% or more by weight of the alkali metal salts of unsaturated fatty acids having one or more double bonds, which are component 'c}, are produced using natural fats and oils such as beef tallow and coconut oil as raw materials. The number of carbon atoms is preferably 10 to 24.

In order to satisfy both low foam I property and cleaning power, these '
Components a-, 'b) and (c) should be present in amounts of 5-25 weight percent, 3-1 weight percent and 2-7 weight percent, respectively. Furthermore, in the low-foaming detergent composition of the present invention, the blending ratio of both components 'a} and 'b} and the blending ratio of both components 'b) and 'c} are important; {a}
The weight ratio of /'b} must be in the range of 6/1 to 1/1, and the weight ratio of 'b}/'c} must be in the range of 4/1 to 1/2. When the 'a'/'b' key exceeds 6/1, the cleaning power decreases due to foaming. Also 1/
When it is less than 1, the cleaning power decreases. On the other hand, 'b}
If /'c' exceeds 4/1, the detergent will not exhibit an effective defoaming effect, resulting in a decrease in detergency. Further, when the amount is less than 1/2, the cleaning power decreases because no effective defoaming effect is exhibited. The low build-up detergent composition of the present invention can further contain an inorganic builder. Examples of inorganic builders include sodium tripolyphosphate, sodium pyrophosphate, sodium orthophosphate, sodium silicate, soda carbonate,
Examples include sodium sulfate and aluminosilicate. The low-foaming detergent composition of the present invention may also optionally contain a salt of a polymer of maleic anhydride or acrylic acid, a salt of a copolymer of maleic anhydride or acrylic acid and olefin, citrate, In addition to containing an organic builder such as sodium nitrilotriacetate, it may also contain an organic chelating agent such as EDTA, an antifouling agent, an enzyme, a light brightener, a fragrance, and the like.

EXAMPLES Hereinafter, the low-foaming detergent composition of the present invention will be explained in more detail with reference to Examples.

Example 1 Washing machine: Westinghouse LT170 under the following washing conditions Washing concentration: 0.3% Temperature: 3 pm Time: 15 minutes, Wear ratio: 6 times Cleaning composition No. 1 with the composition shown in Table-1. 1~No. 8
The low foaming properties and detergency were tested, and the results are shown in Table 1.

Here, detergency and foam height each indicate the following. Dissolve 3.5 g of gelatin in 950 cc of water with a cleaning rate of about 4 p○,
Carbon black was then added and dispersed by vigorous stirring.

Next, inorganic dirt and organic dirt were added, emulsified, and dispersed. A 10 x 20 piece of clean cloth (cotton cloth designated by the Japan Yukagakusha Association) was immersed in this dirt bath, and then the water was squeezed out using two rubber rolls. After drying this dirty cloth at 105qo for 30 minutes, both sides of the dirty cloth were rubbed and cut into 5 arcs x 10 pieces with a reflectance of 42.
A cloth with a soil content of 2% was used as a dirty cloth. Each of the 1q pieces of dirty cloth was sewn onto a 90 x 90 piece of clean cloth and washed.

The cleaning rate was calculated by measuring the reflectance of the dirty cloth before and after cleaning, and using the following calculation.

Cleaning rate (%) = Ki Sanon X・o.

Foam height: The foam height after washing was measured.

Table-1 Diadol911 (EO) of N04 in the table.

The test results show that instead of (PO)4, polyoxypropylene glycol with a molecular weight of 2000 and ethylene oxide added to it to make it approximately 80% of the total molecular weight were used, and the foam height was on the 5 side. The cleaning rate was extremely low, and the cleaning rate was also far inferior at 30%, indicating that this substitute has no cleaning power and strong antifoaming power. [1' The common compositions other than bd in the table are as follows: Sodium phosphate: 1 t% Sodium silicate '5':
1 skin t% Lupoxymethyl cellulose: lwt% Sannitrate, water:
Remaining ■ C, 4 ~, 8 AOS: carbon number 14 ~ 18
Q Olefin Sodium Sulfonate [3} Diadol
911 (EO).

(PO)4: Polyoxyethylene polyoxypropylene alkyl ether obtained by adding 10 moles of ethylene oxide and 4 moles of propylene oxide to Diadol911. is a synthetic higher alcohol mixture with a branching rate of 50%. ■ Soap: Contains 42wt% alkali metal salt of unsaturated fatty acid, alkali metal salt of fatty acid with 16 to 18 carbon atoms '5' Sodium silicate: Si02/Na20 molar ratio is 2.2/1 From the results in Table 1 As is also clear, the cleaning compositions of the present invention (Nos. 2, 3, 4, and 7) exhibit low foam height and high cleaning efficiency, whereas other cleaning compositions with inappropriate compositions (Nos. 1, 5, 6, and 8) had problems with foam height, cleaning rate, or both.

Example 2 Using a cleaning composition having the following composition, the foam height and cleaning rate were tested in the same manner as in Example 1.

C, 4~, 8 AOS: 1
5wt% polyoxyethylene polyoxypropylene alkyl ether: 5W
t% soap (same as Example 1): 3wt%
Sodium pyrophosphate: 1 t% Sodium silicate: 1 t% Ruboxymethyl cellulose: lwt% Reed sulfate, water:
At this time, the remainder is Djadol as polyoxyethylene polypropylene alkyl ether.
Using addition products of 911 and ethylene oxide and propylene oxide, the number of moles added to Diadol 911 was varied as shown in Table 3, and the effect thereof was examined.

The results are shown in Table-2. Table 2 As is clear from Table 2, the cleaning composition of the present invention (N
o. No. 10, 11, 12, 1 and 15) showed low foam height and high cleaning rate, whereas other cleaning compositions (No. 913, 16) with an inappropriate number of added moles had low cleaning power. Or even worse, the foam price was high.

Example 3 Using a cleaning composition having the following composition, Example 1
Foam height and cleaning rate were tested in the same manner as above.

C, 4~, 8 AOS:
15wt% Diadol911 (EO).

(PO)4: 5wt% soap (carbon number 16
~18 alkali metal salts of fatty acids):
．． 3wt% Sodium Pyrophosphate:
1 skin t% lotus acid soda:
...wt% Lupoxymethylcellulose: lw
t% trinitrate, water: remainder At this time, the amount of alkali metal salt of unsaturated fatty acid contained in the soap was varied as shown in Table 3, and its influence was examined. The results are shown in Table-3. Table 3 As is clear from Table 3, the cleaning composition of the present invention (N
o. Nos. 19 to 21) showed low foam height and high cleaning rate, whereas other cleaning compositions (No.
Nos. 17 and 18) were unsatisfactory in both foam height and cleaning rate.

Example 4 Specific composition examples of the low foaming detergent composition of the present invention are shown in Table 4.
Shown below.

Note that the numerical values in the table indicate weight percentages. All of these composition examples had a good cleaning rate of 45% or more.

Table 4 (1)○,4~,8AOS-Na: Same as Example-1 (2)02o~24 A○S-Na: o-olefinsulfonic acid sortary (with 20 to 24 carbon atoms)
3)○,.

~,4 LAS-Na: alkyl group has 10 to 1 carbon atoms
4 linear alkylbenzene sulfonic acid sodium (4) 0
14-15AS-Na: Dobano and 45■ Synthetic alcohol with 14-15 carbon atoms manufactured by Mitsubishi Yuka (Branching rate: 22
*) sulfate (5) Diad.

Otsu911kuE〇), okP〇) 4: Same as Example-1 (
6) Same as (5).

(7) (5) Same as K.

DobanoZ23 is made by Mitsubishi Yuka and has 12 to 13 carbon atoms.
is a synthetic higher alcohol with a branching rate of 21%.

Claims (1)

[Scope of Claims] 1 The following component (a) A group of α-olefin sulfonates having 12 to 24 carbon atoms, linear alkylbenzenesulfonates having an alkyl group of 10 to 15 carbon atoms, and alkyl sulfates having 10 to 15 carbon atoms. One or more anionic activators selected from (b) having an alkyl group having 9 to 15 carbon atoms;
Polyoxyethylene polyoxypropylene alkyl ether in which the number of added moles of ethylene oxide is 5 to 20 and the number of added moles of propylene oxide is 2 to 8; and (c) unsaturated having one or more double bonds. 5 to 25 weight percent, 3 to 10 weight percent, and 2 to 7 weight percent of fatty acid alkali metal salts containing 30 weight percent or more of fatty acid alkali metal salts, respectively, and the weight ratio of (a) and (b) ( a)/(
b) is in the range of 6/1 to 1/1, and (b) and (c
) A low-foaming detergent composition characterized in that the weight ratio (b)/(c) is in the range of 4/1 to 1/2.