PH26743A

PH26743A - Liquid detergent bleaching composition

Info

Publication number: PH26743A
Application number: PH39986A
Authority: PH
Inventors: Kazunori Tsukada; Akira Ogasawara; Shuji Takana; Yasuhiko Makino
Original assignee: Kao Corp
Priority date: 1989-02-10
Filing date: 1990-02-02
Publication date: 1992-09-28
Also published as: HK57394A; JPH02212599A; GB9002531D0; GB2229460B; MY105542A; GB2229460A; JP2617558B2

Description

. . 1 . r 73 2 TE 7 3 8 }

Liquid detergent bleaching composition (IE " ig | i

The present invention relates to a liquid detproents iv : bleach composition which is superior in detergency, 5 at. : bleaching power, and storage stability. | “ Cs LT

Prior art . - :

There have been known many detergent-bleach composi- tions which are based on alkali metal hypochlorite. They contain a surfactant as a washing adjuvant. This surfac- tant is usually an anionic surfactant such as paraffin sulfonate (as disclosed in Japanese Patent Laid-open No. 148006/1979) and an alkali metal salt of polyoxyethylene oy alkylphenyl ether sulfate or alkyldiphenyl ether sulfate - (as disclosed in Japanese Patent Laid-open No. 69415/1977). They are selected because of their solubil- ity toward an aqueous solution of alkali metal hypochlo- rite and their ability to keep stable available chlorine in an aqueous solution of alkali metal hypochlorite. In . some cases, the anionic surfactant is replaced by a carbo- betaine-type amphoteric surfactant (as disclosed in U.K. oo Patent No. 1329086 and Dutch Patent No. 148103). By the addition of these surfactants, the detergent liquid is improved in surface activity and hence in detergency; nev- ertheless, their effect still is not regarded as satisfac- tory.

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An additional disadvantage of the conventional liquid detergent-bleach composition is that it has such a low viscosity that it does not stay long on inclined or verti- cal walls and hence does not fully exhibit its detergency.

Several means have been devised to eliminate this disad- vantage by making viscous the solution of alkali metal hypochlorite. This object has been achieved by incorpo- rating the solution with an inorganic or organic thick- ener. Examples of inorganic thickeners include hydrated aluminum or magnesium silicate such as montmorillonite and attapulgite (as disclosed in Japanese Patent Laid-open No. 168999/1982) and sepiolite clay minerals (as disclosed in

Japanese Patent Publication No. 21969/1986). The former has an adverse effect on the retention of available chlo- rine and the long-term storage stability under strong basic conditions. The latter assumes a clayish color (loessal color) and hence looks poor and has an adverse effect on the long-term storage stability. Typical exam- ples of organic thickeners are water-soluble polymeric compounds such as polyvinyl alcohol, methyl cellulose, polyacrylate, and xanthan gum. They also have an adverse effect on the retention of available chlorine and the

Co long-term storage stability.

. " } 26743 . 3

Summary of the Invention

The present inventors carried out extensive studies to develop a liquid detergent-bleach composition which possesses an adequate degree of viscosity, keeps stable alkali metal hypochlorite, and keeps its appearance intact even after storage for a long time. As the result, it was found that this objective is achieved by the combination of specific components. This finding led to the present invention. :

Accordingly, it is an object of the present invention to provide a liquid detergent-bleach composition which comprises: (a) 0.01-10 wt% of a sulfobetaine-type amphoteric surfac- tant represented by the general formula below,

R,

R10 (CH,) ,-S0,° (1) ry (where R; denotes a C4,, alkyl group; R, and R,; each denotes a C,_, alkyl group; and n denotes an integer of 2-3.) (b) 0.1-5 wt% of an amine oxide compound represented by the general formula below,

R,RsR{N—O0 (II) (where R, denotes a Cg, alkyl group; and Ry; and R; each denotes a C,_, alkyl group.)

(c) 0.1-6 wt% of an alkali metal salt of a C4, saturated fatty acid or Cigis alkylsarcosine, (d) 0.5-10 wt% of alkali metal hypochlorite, and (e) 0.1-10 wt% of an alkaline substance.

The liquid detergent bleaching composition of the invention comprises (a) 0.01 to 10 wt.% of a sulfobetaine, amphoteric surfactant having the formula (I) in which R1 is an alkyl having 8 to 22 carbon atoms, R2 and R3 are each an alkyl having 1 or 2 carbon atoms and n is 2 or 3, (b) 0.1 to 5 wt.% of an amineoxide compound having the formula (II) in which R4 is an alkyl having 8 to 20 carbon atoms and R5 and R6 are each an alkyl having 1 to 3 carbon atoms, (c) 0.1 to 6

Co wt.% of an alkali metal salt of a saturated aliphatic acid having 8 to 18 carbon atoms or an alkylsarcosine having 10 to 18 carbon atoms, (e) 0.5 to 10 wt.% of an alkali metal salt of hypochlorous acid, (f) 0.1 to 10 wt.% of an alkaline matter and (g) the balance of water.

In the general formula (I) above, R, is a Cy, alkyl group, preferably a C;,.,3 alkyl group; R, and R; each is a

C,., alkyl group, preferably a methyl group; and n is an integer of 2-3, preferably an integer of 3.

In the general formula (II), R, as a C4, alkyl group includes for example octyl, decyl, dodecyl, tetradecyl group, haxadecyl group, and octadecyl group.

Preferable among them are a dodecyl group and tetradecyl group. They may also be a mixture of alkyl groups having different number of carbon atoms which is derived from natural products. R; and Ry, each is a C,; alkyl group, which includes a methyl group, ethyl group, and propyl group. Preferable among them is a methyl group.

Component (b), which is an amine oxide compound rep- resented by the general formula (II), includes, for example, lauryldimethylamine oxide, myristyldimethylamine oxide, and coconut-dimethylamine oxide.

Component (c), which is an alkali metal salt of a Cg, saturated fatty acid or C,o.,s alkylsarcosine, includes, for example, sodium laurate and sodium lauryl sarcosinate and a mixture thereof.

Component (d), which is alkali metal hypochlorite, is usually sodium hypochlorite.

Component (e), which an alkaline substance, includes, for example, sodium hydroxide, sodium carbonate, sodium metasilicate, and sodium triphosphate. Preferable among them is sodium hydroxide.

The content of component (a), which is a sulfo- betaine-type amphoteric surfactant, should be 0.01-10 wtg, preferably 0.03-5 wt%. With a content less than 0.01 wt, the composition is poor in storage stability. A content more than 10 wt$% is not practically necessary.

The content of component (b), which is an amine oxide compound, should be 0.1-5 wt%, preferably 0.1-3 wt%. With a content less than 0.1 wt%, the composition is poor in storage stability. With a content more than 5 wt%, the alkali metal hypochlorite is less stable.

The content of component (c), which is an alkali metal salt of a Cg.1s saturated fatty acid or Cio-18 @lkyl- sarcosine, should be 0.1-6 wt%, preferably 0.1-4 wtg.

With a content less than 0.1 wt%, the composition does not

RE have a sufficiently high viscosity. With a content more than 6 wt%, the composition is too viscous to be used easily.

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The content of component (d), which is alkali metal hypochlorite, should be 0.5-10 wt%, preferably 2-7 wt%.

With a content lower than 0.5 wt%, the composition is poor in bleaching power. A content higher than 10 wt% is not practically necessary.

The content of component (e), which is an alkaline substance, should be 0.1-10 wt%, preferably 0.5-5 wt%.

The liquid detergent-bleach composition of the present invention may be optionally incorporated with com- monly used additives such as other surfactant than men- tioned above, chelating agent, perfume, and coloring agent.

Incidentally, the liquid detergent-bleach composition of the invention may have a viscosity of 5 to 2000 cp, preferably 10 to 500 cp, determined with a Brookfield viscometer at 20°c, being changeable according to need.

The present invention provides a liquid detergent- bleach composition which effectively removes soil and gives a clean finish after washing. In addition, the liquid detergent-bleach composition is easy to use on account of its adequate viscosity and is superior in storage stability.

Examples

The invention will be described with reference to the following examples, which are not intended to restrict the scope of the invention.

Examples 1 and 2 and Comparative Examples 1 to 7

Liquid detergent-bleach compositions were prepared according to the formulations shown in Table 1. Their detergency, finish, and low-temperature stability were evaluated according to the following criteria. (To evalu- ate the former two items, 30 g of the sample composition was smeared on a soiled household toilet stool which could not be washed with water alone, and the surface of the toilet stool was observed after flushing.)

Detergency

A : More than 80% of soil was removed.

B : From 20% to 50% of soil was removed.

C : Almost no soil was removed.

Finish

A : Less than 20% of the surface repelled water after flushing.

B : From 20% to 50% of the surface repelled water after flushing.

C : More than 50% of the surface repelled water after flushing.

Low temperature stability

The sample composition was examined for appearance after storage for 30 days, with the temperature changing in the range of from -20°C to +20°C once a day.

A : No change was noticed before and after storage.

B : Slight separation and precipitation were noticed.

C : Separation and precipitation were noticed.

The results of the evaluation are shown in Table 1.

i0

Table 1 ] Example Comparalive Example

Components of liquid detergent-bleach 2 3 4 7

Er a ©

Ee [o ” E ammonium betaine

EE ammonium belaine =r

SE wo] he =

Cm ||] ether sulfate

EET fe : = 0 sounnoois [a0 e0| 2020202020] 2020] © [Csommmpemen [505050 | 50] 50] 5a [sa [sn 50 :, oi [or + Fi 1 foo eet [ermmm [PITT (20°C ~ +20°C, 30 cycles)

Note to Table 1 *1 No. of ethylene oxide molecules added: 4 on average *2 "Ajidplus P" made by Takeda Chemical Industries, Ltd. *3 1Kelzan' made by Sansho Co., Ltd. x4 Balance required to make the entire quantity 100.

Examples 3 and 4 and Comparative Examples 8 to 11

Liquid detergent-bleach compositions were prepared according to the formulations shown in Table 2. Their viscosity (resistance to run) and finish were evaluated according to the following criteria. (Flush toilet stools were used for the testing in the same manner as mentioned above.)

Liquid viscosity (resistance to run)

The sample compositions were rated in five grades by 30 panelists (housewives), and the results are indicated in average. : Highly resistant to run. 4 : Slightly resistant to run. 3 : Intermediate. 2 : Slightly liable to run. 1 : Highly liable to run.

Finish

The appearance of toilet stools washed with the sample compositions were rated in five grades by 30 panel- ists (housewives), and the results are indicated in average. 5 : Good finish (with gloss) 4 : Slightly good finish (with some gloss) 3 : Intermediate 2 : Slightly poor finish (with little gloss)

1 >

A

1 : Poor finish (no gloss)

The results of the evaluation are shown in Table 2. ” Table 2

Components of liquid detergent-bleach 3 8 10 1 composition (wi%)

N,N ,N-stearyldimethyl-N-sulfopropyl- 0.1 0.005 - - - ammonium betaine

Lauryldimethylaminoacetale betaine - Co - 10 Co -

Lauryldimethylamine oxide 10 0

Sodum rt Ts [os [os [es [0s

Sodium polyloxyethylene) nonylphenyl ether sulfate ** 3 eer [sale | s|e]o] . Co Liquid viscosity {resistance to run) a5 | 45 | 45 | 43 | 42 | 18

Fi “ea | as [oo or [ar [00]

Note to Table 2 *5 No. of ethylene oxide molecules added: 6 on average x6 Balance required to make the ent ire quantity 100.

Claims

on * ; What is claimed is: | . } . > 4d st : Ae

1. A liquid detergent bleaching composition ° = oa iz which comprises: & Lad % " VD : . 13 eo > (a) 0.01 to 10 wt.% of a sulfobetaine, i} No 23 amphoteric surfactant having the formula (I): %. 3 a a R, R,-N®- (CH,) ,~S05° (1) R, in which R1 is an alkyl having 8 to 22 carbon atoms, R2 and R3 are each an alkyl having 1 or 2 carbon atoms and n is 2 or 3, (b) 0.1 to 5 wt.% of an amineoxide compound having the formula (II): RRRN—O (ID) in which R4 is an alkyl having 8 to 20 carbon atoms and R5 and R6 are each an alkyl having 1 to 3 carbon atoms, (c) 0.1 to 6 wt.% of an alkali metal salt of a saturated aliphatic acid having 8 to 18 carbon atoms or an alkylsarcosine having 10 to 18 carbon atoms,

(e) 0.5 to 10 wt.% of an alkali metal salt of hypochlorous acid, (f) 0.1 to 10 wt.% of an alkaline matter and (g) the balance of water.

2. The composition as claimed in Claim 1, which has a viscosity of 5 to 2000 cp at 20 degree centigrade. Le bee e, ho ; lb tee : . Ca . oo Co Lo a