JPH0774354B2 - Enzyme-containing liquid detergent composition - Google Patents

Description

TECHNICAL FIELD The present invention relates to an enzyme-containing liquid detergent composition. More specifically, the present invention relates to an enzyme-containing liquid detergent composition for clothes which is excellent in bromine stability and detergency.

2. Description of the Related Art Conventionally, it has been well known that a surfactant is blended with an alkanolamine such as monoethanolamine, diethanolamine, or triethanolamine in order to obtain a detergent composition having improved cleaning power against dirt on clothes. (Japanese Patent Publication No. 52-38846, Japanese Patent Publication No. 58-33280)
No. 50-60503, No. 50-70408, No. 50-95303, No. 50-112404, No. 51-33103), and it is also well known to mix enzymes such as amylase and protease. (JP-B-47-45802, 48)
-30646, JP 473733, 52-128904
No. 53-56204 and No. 56-129298).

Further, it is well known to add a fluorescent whitening agent to improve whiteness (Japanese Patent Publication No. 47442/1972).

However, the detergent composition containing the alkanolamine, the enzyme and the fluorescent whitening agent is recognized to have the effect of improving the detergency, but the problem that the odor of the detergent composition deteriorates when stored Have Therefore, it has been desired to develop an enzyme-containing liquid detergent composition which is free from such problems and has excellent detergency.

OBJECT OF THE INVENTION It is an object of the present invention to provide an enzyme-containing liquid cleaning composition which meets such demands, is excellent in detergency and has little odor deterioration.

Composition of the Invention The enzyme-containing liquid detergent composition of the present invention has the following (A),
(B), (C) and (D) component, the total amount of the (C) component and the (D) component is in the range of 0.1 to 1.0% by weight, and (C) / (D) weight. The ratio is in the range of 0.3 to 3.0.

(A) Anionic surfactant of general formula (I): 10 to 40% by weight, RO (CH ₂ CH ₂ O) _n SO ₃ M (I) (wherein each symbol represents the following).

(R: linear or branched alkyl or alkenyl group having 11 to 15 carbon atoms, n: 2 to 7, M: alkali metal or alkanol-substituted ammonium group) (B) alkanolamine: 0.5 to 5% by weight.

(C) A proteolytic enzyme selected from sabinase and alcalase.

(D) A fluorescent whitening agent of the general formula (II).

(In the formula, X represents an alkali metal) Hereinafter, the present invention will be described in more detail.

The anionic surfactant as the component (A) is a polyoxyethylene alkyl sulfate salt represented by the general formula RO (CH ₂ CH ₂ O) _n SO ₃ M (I), in which R is a carbon number. 11 to 15 straight-chain or branched alkyl or alkenyl groups. If the carbon number of R is less than 11, the detergency is inferior, and if it exceeds 15, the liquid property deteriorates, which is not preferable. Preferred carbon number is 12
Is ~ 13. In the formula, M is, for example, an alkali metal such as sodium or potassium or an alkanol-substituted ammonium group such as monoethanol-substituted, diethanol-substituted or triethanol-substituted. In the formula, n is the average number of moles of ethylene oxide (EO) added and is in the range of 2 to 7. When the average number of added moles is less than 2, the liquid stability is lowered, and when it exceeds 7, the foamability is lowered, which is not preferable.
A desirable average added mole number is 3 to 5.

Such a polyoxyethylene alkyl sulfate ester salt can be used, for example, in a synthetic or natural saturated or unsaturated alcohol having a carbon chain length of C _{11 to 15 in} a molar ratio of 2 to 7 times in the presence of an alkali catalyst or an acid catalyst. It can be easily obtained by introducing ethylene oxide to cause an addition reaction, sulfating the obtained addition reaction product with a sulfonating agent such as sulfane, and then neutralizing it.

The polyoxyethylene alkyl sulfate ester salt must be contained in the detergent composition in an amount of 10 to 40% by weight, preferably 20 to 35% by weight. If it is less than 10% by weight, the performance such as detergency and foaming is deteriorated, and if it exceeds 40% by weight, the liquid stability is deteriorated, which is not preferable.

Examples of the alkanolamine as the component (B) include monoethanolamine, diethanolamine, triethanolamine and the like, which may be used alone or in combination of two or more kinds. The content of this alkanolamine is 0.5 to 5% by weight in the detergent composition,
It is preferably 1 to 3% by weight. If it is less than 0.5% by weight, the detergency is insufficient, and if it exceeds 5% by weight, the odor stability deteriorates.

As the proteolytic enzyme as the component (c), “Alcalase” (Alcalase) and “Savinase” (Savinase) (both are registered trademarks) manufactured by Novo Industry Co., Ltd. can be used, and these may be used alone. However, two kinds may be combined.

The fluorescent whitening agent of the component (D) has the general formula (II) 4,4'-bis (2-sulfostyryl) biphenyl salt represented by These may be used alone or in combination of two or more. The blending amount of the (C) component and the (D) component is such that the total amount of the (C) component and the (D) component is 0.1 to 1.0% by weight.
And the weight ratio of (c) / (D) is 0.3 to
Selected to be in the 3.0 range. The preferable range of the total blending amount is 0.3 to 0.8% by weight. When the total amount of the component (C) and the component (D) is less than 0.1% by weight, the detergency and the fluorescent whitening property are insufficient, and the whiteness in appearance is insufficient. On the other hand, if it exceeds 1.0% by weight, the odor stability deteriorates.

Furthermore, if the (C) / (D) weight ratio deviates from the range of 0.3 to 3.0, the odor stability deteriorates.

The cleaning composition of the present invention may further contain a nonionic surfactant or other anionic surfactant for the purpose of further improving detergency, enhancing foaming performance, and facilitating rinsing. it can. As the nonionic surfactant used at this time, for example, the one represented by the general formula (III) is suitable.

R′O (CH ₂ CH ₂ O) _m H (III) (Each symbol in the formula is as follows.

R ': a straight-chain or branched alkyl group having 11 to 15 carbon atoms or an anikenyl group, m: 7 to 25) The amount of the nonionic surfactant compounded is 5 to 30% by weight based on the detergent composition. It can be applied in a wide range of%.
Particularly, the range of 5 to 20% by weight is preferable.

Further, since the anionic surfactant tends to deteriorate the stability of the enzyme, it is blended within a range that does not adversely affect the enzyme. Examples of the anionic surfactant used in this case include alkylbenzene sulfonate, soap, and α-olefin sulfonate.

Further, in the detergent composition of the present invention, various additives usually used in detergent compositions, for example, a foaming agent such as alkylamine oxide or fatty acid alkanolamide, lower alcohol, polyhydric alcohol, lower If necessary, a hydrotrope such as an aryl sulfonate, a fungicide such as a benzoate, a calcium salt, a dye and a fragrance may be added.

EFFECTS OF THE INVENTION According to the present invention, a polyoxyethylene alkyl sulfate ester salt which is an anionic surfactant is used as a surfactant, which is combined with an alkanolamine, and further a specific proteolytic enzyme and a specific fluorescent bleaching agent are combined. By defining and adding the total amount and the blending ratio, it is possible to realize an enzyme-containing liquid detergent composition which has a great effect of removing stains on clothes and is excellent in detergency and in which odor deterioration after storage is effectively prevented.

Next, the effects of the present invention will be described in more detail with reference to examples. Various performance evaluations in each example were performed according to the following test methods. .

Detergency Using a Terg-O-Tometer manufactured by US.Testing Co. as a washing device, 10 pieces of protein-containing wet artificial dirt cloth, sebum cloth, and clean knitted cloth are put in a bath ratio of 30 times, and at 120r.pm. Wash at 25 ° C for 10 minutes. As the cleaning liquid, 900 ml of a cleaning agent having a concentration of 0.1% is used, and rinsing is performed with 900 ml of water for 3 minutes. The water used was 3 ° DH. The detergency is calculated by the following formula.

The detergency is based on Oil Chemistry 30 , 432, (1981) "Study on new artificial soil cloth (1st report)".

Odor 50 ml of the detergent composition to be tested was put in a 100 ml glass bottle, sealed, and stored at 45 ° C for 1 month, then returned to room temperature, the stopper was removed, and a change in odor was judged sensory by using a room temperature storage product as a control.

Judgment criteria O: Same as or slightly different from the room temperature stored product.

Δ: Clearly different from the room temperature stored product.

X: Remarkably different from the product stored at room temperature.

There is no problem in commercial value if the above criteria are ○ or above.

Example A liquid detergent composition having the composition shown in Table 1 was prepared and its performance was evaluated.

Claims (1)

[Claims] (A) General formula (I) RO (CH ₂ CH ₂ O) _n SO ₃ M (I) (wherein each symbol represents the following. R: C 11 to 15 carbon atoms) Linear or branched alkyl or alkenyl group, n: 2 to 7, M: alkali metal or alkanol-substituted ammonium group) 10 to 40% by weight of anionic surfactant, (B) alkanolamine 0.5 to 5% by weight, (C) proteolytic enzyme selected from sabinase and alcalase, and (D) general formula (II) (Wherein X represents an alkali metal), the total amount of the component (C) and the component (D) is 0.1 to 1.0% by weight, and (C ) / (D) weight ratio is in the range of 0.3 to 3.0, an enzyme-containing liquid detergent composition.