JPH04337399A - Liquid bleaching agent composition - Google Patents

Abstract

PURPOSE:To obtain a liquid bleaching agent composition, having transparent appearance and excellent in preservation stability and bleaching power. CONSTITUTION:A transparent liquid bleaching agent composition containing (a) hydrogen peroxide, (b) an anionic surfactant and (c) an amphoteric bleaching activator, reactive with the hydrogen peroxide and producing an organic peracid having a quaternary ammonium group in a specific proportion.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid bleach composition, and more particularly to a liquid bleach composition having excellent storage stability and good bleaching power.

0002

Bleaching agents are chemically classified into chlorine bleaching agents and oxygen bleaching agents. Moreover, when classified physically, it can be divided into solid (powder) and liquid.

[0003] Chlorine bleach has limitations on the types of fibers that can be used, cannot be used on colored or patterned fabrics, and has a unique odor. It is starting to spread significantly.

[0004] Among these oxygen bleaches, solid ones such as sodium percarbonate and sodium perborate are particularly used from the viewpoint of bleaching performance and stability, and liquid bleaches using hydrogen peroxide are used. It has become quite popular due to its simplicity.

[0005] Oxygen bleaches have weaker bleaching power than chlorine bleaches, and various bleach activators are used in combination. These bleach activators include nitriles such as acetonitrile, O-acetylated products such as glucose pentaacetate (GPAC), N-acylated products such as tetraacetylethylenediamine (TAED), etc.
Examples include acid anhydrides represented by maleic anhydride.

[0006] Furthermore, as a result of research by the present inventors,
3-233969, JP 63-315666, JP 64-68347, JP 1-1
It has been found that compounds that react with hydrogen peroxide to produce organic peracids having a quaternary ammonium group, such as those exemplified in Japanese Patent No. 90654, are extremely effective as bleach activators.

In the case of solid compositions, storage stability is achieved by mixing solid persalts with solid activators as dry particles which form organic peracids. As long as they are kept dry during storage, no significant reaction or activity loss occurs until the mixture is placed in water, such as in a washing machine. For example, in a high humidity environment, such as in a bathroom, dry bleach becomes damp and becomes less active. It is not possible to obtain dry particulate bleach when liquid hydrogen peroxide is used as the peroxide source.

[0008] Several proposals have been made for liquid hydrogen peroxide bleach compositions. Among these, JP-A No. 62-230897 discloses a method using a bleach activator that generates organic peracid, which is a storage-stable, low-temperature solution in which a solid bleach activator is dispersed in an acidic aqueous solution of hydrogen peroxide. Active compositions are disclosed. However, this composition is not transparent and contains a bleach activator dispersed in it.
During storage, the bleach activator precipitates and separates. There are no liquid bleach compositions with dissolved bleach activators that produce organic peracids.

[0009]

[Problems to be Solved by the Invention] Therefore, there is a need for a liquid oxygen bleaching agent that dissolves the bleach activator to make it transparent, has improved storage stability, and has higher bleaching power. An object of the present invention is to provide such a liquid oxygen bleach composition.

0010

[Means for Solving the Problems] The present inventors have conducted intensive research to obtain a transparent liquid oxygen bleach composition with excellent storage stability and higher bleaching power. By combining the bleach activator with an amphoteric bleach activator that generates an organic peracid having a quaternary ammonium group, the bleach activator can be dissolved uniformly and transparently, and is extremely stable even in hydrogen peroxide. It was discovered that a transparent liquid oxygen bleach composition could be obtained, and the present invention was completed.

[0011] That is, the present invention provides: (a) hydrogen peroxide;

0.5-10% by weight (b) Anionic surfactant (c) An amphoteric bleach activator that reacts with hydrogen peroxide to produce an organic peracid having a quaternary ammonium group (b)
)+(c) = 0.1-50% by weight, (b)/(c
)=50/1 to 1/3 (weight ratio).

The anionic surfactant (b) used in the present invention includes, for example, straight-chain or branched-chain alkyl
(C8-C18) Benzene sulfonate, alkyl or alkenyl (C8-C18) Ether sulfate, alkyl or alkenyl (C8-C18) sulfate, olefin (C12-C18) sulfonate, alkanesulfonate, saturated or Examples include unsaturated fatty acid salts.

[0013] Examples of the amphoteric bleach activator (c) that reacts with hydrogen peroxide to produce an organic peracid having a quaternary ammonium group used in the present invention include those having the following structure. .

[0014]

[Chemical formula 1]

[0015] Are a and b a = 0, b = 0?
Or a = 1, b = 1. R2 and R3 are C1 to C
2 is an alkyl group.

[0016] The linking group is not particularly limited, but
For example, linear or branched alkylene group, cycloalkylene group, phenylene group or alkylenephenylene group, oxyalkylene group (-CH2CH2O-), -CpH
2p- (p is 1 to 12, preferably 1 to 5), and the like. Moreover, Z is -SO3- group, -COO-
represents a group.

Among these bleach activators, those represented by the following formulas are particularly desirable.

[0018]

[Case 2]

The above anionic surfactant (b) and an amphoteric bleach activator (c) which reacts with hydrogen peroxide to form an organic peracid having a quaternary ammonium group are present in the composition (b) +(c) The total amount is 0.1 to 50% by weight, preferably 6 to 30% by weight. Also, the weight ratio of component (b) and component (c) is (b)/(c), which is 50/1.
~1/3, preferably 10/1 ~ 1/1.

[0020] The composition of the present invention usually comprises the above (a) to (c).
) It is desirable to balance the ingredients by adding water to make the pH of the composition weakly acidic to acidic (pH 6 or less, preferably 3.5 or less). In addition, thickeners, fragrances, pigments, fluorescent dyes, enzymes, etc. may be added as necessary.

[0021]

[Examples] The present invention will be explained below with reference to Examples, but the present invention is not limited to these Examples.

Example 1 Various liquid bleach compositions shown in Table 1 were prepared using the bleach activators shown below, and the storage stability and bleaching effects of each were examined. The pH of each composition was adjusted to 3 with hydrochloric acid. The results are shown in Table 1.

[0023]

[Chemical formula 3]

[0024] Storage stability evaluation method: Store the sample at room temperature, measure the amount of organic peracid generated from the sample before and after storage, calculate the effective peracid amount residual rate using the following formula, and after 7 days, it will be 80%. ○ indicates a survival rate of 80% or higher
Those below were marked as ×.

[0025]

[Math 1]

■ Method for evaluating bleaching effect 20 cc of the bleach composition shown in Table 1 was added to 2 liters of 0.8% commercially available detergent solution (pH=10.5), and 300 ml of the prepared solution was added. Five black tea contaminated cloths* were soaked at 20°C for 30 minutes, rinsed with tap water, dried, and the bleaching rate was calculated using the following formula. Note that the reflectance was measured using a colorimeter N-DR 101-DP manufactured by Nippon Denchroki.

[0027]

[Math 2]

*Black tea contaminated cloth After boiling 80 g of Nitto black tea (yellow package) in 3 liters of ion-exchanged water for about 15 minutes, strain it through a desiccated dry cotton cloth, soak a cotton gold cloth #2003 in this liquid, and boil it for about 15 minutes. 15
Boil for minutes. Remove from the heat, leave for about 2 hours, let dry naturally, and wash with water until the washing liquid is no longer colored.
After dehydration and pressing, a test piece of 8 x 8 cm was prepared and used for experiments.

[0029]

[Table 1]

Claims (2)

[Claims] [Claim 1] (a) Hydrogen peroxide

0.5-10% by weight (b) Anionic surfactant (c) An amphoteric bleach activator that reacts with hydrogen peroxide to produce an organic peracid having a quaternary ammonium group (b)
)+(c) = 0.1-50% by weight, (b)/(c
)=50/1 to 1/3 (weight ratio) of a transparent liquid bleach composition. [Claim 2]Claim 1, wherein the pH of the composition is 6 or less.
A liquid bleach composition as described.