JPS62141099A - Bleaching 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] Mitsunori Ichishu Poetry BLEACH COMPOSITIONS FIELD OF THE INVENTION This invention relates to bleach compositions.

BACKGROUND ART It is widely practiced to bleach tableware and the like using inorganic or organic peroxides such as sodium percarbonate.

In order to improve the stability of such bleach compositions during storage, attempts have been made to add bleaching agents such as nitrilotriacetate and ethylenediaminetetraacetate; The current situation was that sex was still insufficient.

Furthermore, for the purpose of improving this stability, JP-A-51-144407 proposes the use of a chelate resin having a polyaminoethyl group as a functional group.

However, in bleach compositions using inorganic or organic peroxides, in addition to the above-mentioned storage stability,
It has been found that there is a problem with powdery substances depositing on the surfaces of tableware, etc. In manual bleaching and cleaning processes, the surface of dishes, etc. is usually scrubbed with a sponge or the like after the bleaching process, so the deposition of powdery substances on the surface was not noticeable. However, it has been found that a problem arises when washing a large amount of tableware etc. in an automatic dishwasher after bleaching. Automatic dishwashers are used to wash large quantities of kitchen utensils such as dishes and cooking utensils, and the dishes are bleached and then spray washed. However, powdery substances adhering to tableware and the like cannot be sufficiently removed by spray cleaning and remain on the surface of the tableware. The origin of this powder is
It is possible, but not clear, that scale or other components of the bleach composition, such as water-insoluble carbonates formed when sodium percarbonate reacts with heavy metal ions in the water, may be involved. However, in any case, the above-mentioned chelating agents cannot effectively prevent the adhesion of powdery substances.

The present invention provides a bleach composition that can prevent powdery substances from adhering to the surfaces of tableware and the like.

Structure of the Invention The bleach composition of the present invention contains the following components (A) and (B) in a weight ratio of ([3)/(A) = 1/900 to 1].
/2.

(A) Inorganic or organic peroxide (B) General formula (I) %Formula% (In the formula, R1 represents an alkyl group having 1 to 6 carbon atoms, an alkenyl group, an alkoxy group, or an allyl group, and M is hydrogen or It is a counterion that forms a salt, m/n = 3/7
-1010) molecular weight 800-100
,000 maleic acid homopolymer or copolymer, and polystyrene sulfonic acid having a molecular weight of 800 to 100,000 and a degree of sulfonic acid group substitution on the aromatic ring of 50% or more, or a salt thereof, or a partially neutralized salt thereof. The present invention will be described in further detail below.

The inorganic or organic peroxide of component (A) functions as an effective bleaching ingredient, and specific examples thereof include the following.

A] trioxidized dealkyl percarboxylic acid R2+COOOM) xR2:
Cs-20 alkyl group, alkylene group.

Alkenyl group or alkenylene group .

Component (A) can be used alone or in combination of two or more. Component (A) contains 10 to 90% in the bleach composition.
It is appropriate to set the heavy background percentage, preferably 40 to 80.
Weight%.

As component (B), a maleic acid homopolymer or copolymer represented by the following general formula (I), polystyrene sulfonic acid, a salt thereof, or a partially neutralized salt thereof is used.

OM OM (wherein R1 represents an alkyl group, alkenyl group, alkoxy group or allyl group having 1 to 6 carbon atoms, m/n =
3/7 to 1010, preferably 575 to 1010) The number average molecular weight of the maleic acid homo- or copolymer is 800 to too, ooo, preferably 2.000.
~50,000.

The number average molecular weight of polystyrene sulfonic acid, a salt thereof, or a partially neutralized salt thereof is 800 to too, ooo, preferably 2,000 to so, ooo. Furthermore, polystyrene sulfonic acid or a salt thereof or a partially neutralized salt thereof is one in which the aromatic ring (benzene ring) has a sulfonic group substitution degree of 50% or more, preferably 70%.
That's all.

Component (B) can be blended singly or in combination of two or more, and may be present in the bleach composition in an amount of 0.1 to 10% by weight or 0.5 to 3% by weight. is appropriate.

(A) component inorganic or organic peroxide and component (B) maleic acid homo or copolymer or polystyrene sulfonic acid or its salt or its partially neutralized salt in a weight ratio of (B)/(A). = 1/900 to 1/2, preferably 1/160 to 3/10. If the blending ratio is smaller than this value, adhesion of powdery substances during bleaching cannot be sufficiently prevented, while if the blending ratio is too large, the bleaching effect will decrease. Although the exact mechanism of action of the polymer component (B) of the present invention is not clear, it is presumed that the polymer component (B) increases the dispersibility of suspended matter in water and prevents the formation of sediment. be done. Further, the effects of the present invention can be obtained without adding a phosphate such as tripolyphosphate, so it can be phosphorus-free.

The bleach composition of the present invention further contains anionic, nonionic, cationic, amphoteric surfactants, inorganic builders such as carbonates, silicates, sulfates, phosphates, etc., as necessary. It is also possible to blend an alkaline agent such as 1-1-11 hydroxide. When a surfactant is added, it is appropriate to add it to the bleach composition in an amount of 0.5 to 20% by weight.

According to the present invention, by blending a specific maleic acid homo or copolymer, polystyrene sulfonic acid or its salt, or a partially neutralized salt thereof into a bleaching agent composition, tableware etc. can be washed after bleaching. This prevents powdery substances from being deposited on the surfaces of items to be washed.

Each composition shown in Table 1 below was prepared, and the adhesion of white fine powder, rate of decrease in effective oxygen concentration, bleaching detergency, hygroscopic hardening property, and water solubility were evaluated according to the following criteria. .

Page m Door 籺 5 A melamine resin flat plate (15 cm in diameter) was immersed in the specified bleaching detergent solution under the conditions of a temperature of 60°C, a bleach concentration of 0.5% to 11%, and a immersion time of 6°, and then removed. After rinsing under vigorous running warm water and air drying, the state of adhesion of fine particles was examined.

◎: No fine powder was observed at all. O: Fine powder was slightly observed after wiping at 3 to 4 places with fingers. Δ: Fine powder was observed when wiping at 1 place with fingers. ×: Adhesion of fine powder could be confirmed by visual inspection. Decrease in oxygen concentration (storage stability) Measure the effective oxygen concentration of the sample stored in a thermostatic chamber at 45°C for one month using the following procedure, compare it with the initial effective oxygen concentration,
The reduction rate is shown in %.

Dissolve 5g of the sample in 100mQ of pure water and gradually add 50mQ of 10% sulfuric acid solution while stirring.
Let it be oQ.

The obtained solution was placed in a 300 m Erlenmeyer flask at 25°C.
Q-pipetting, add 10 mΩ of iodine-acetic acid solution, leave to stand for 15 minutes, titrate with N/10 sodium thiosulfate solution, take the end point when the dark purple color disappears, and derive the amount of effective oxygen from the following formula.

f: N/10 Potency of sodium thiosulfate A: N/1
0 Titration of Sodium Thiosulfate mQ Number Cleaning Power A plain woven cotton cloth (#100) was washed in a washing machine at 50°C with a bath ratio of 30 times for 15 minutes using a commercially available detergent (Blue Diamond; trade name), and then dehydrated for 5 minutes. do.

Wash and dehydrate using the same procedure again. Next, overflow rinsing is performed for 15 minutes, followed by dehydration for 5 minutes. The overflow rinsing and dehydration operations are repeated a total of 5 times, and then air-dried to obtain a pretreated cloth.

Next, boil a 2% black tea solution for 5 minutes, soak the pretreated cloth in it at a bath ratio of 30 times, boil for 30 minutes, and then boil for 40 minutes.
After being left at ℃ for 30 minutes, it was air-dried to obtain a test cloth (black tea cloth).

The bleaching agent compositions of Examples and Comparative Examples were each added at a concentration of 0.5%, and a black tea cloth was immersed in the solution at a bath ratio of 100 times and left for a predetermined time (15 minutes). The thus treated test cloth was sequentially dehydrated for 1 minute in a washing machine, and then dried by ironing to obtain a bleached cloth.

The reflectance of the above pre-treated cloth, black tea cloth and bleached cloth was measured using a photoelectric reflectance altimeter (ELR [EI'IO, Carl Zei
(manufactured by SS), and the bleaching effect was determined using the following formula.

Bleach cleaning power (%) = Absorption rate: After being stored in a constant temperature bath at 45°C for one month, it is evaluated according to the following criteria.

○: No hygroscopic solidification is observed Δ: Clumping occurs ×: Solidified water-soluble bleach is poured into warm water at 60° C., and its solubility is evaluated according to the following criteria.

○: Dissolves quickly. Δ: Requires time and slight stirring to completely dissolve ×: Precipitation of insoluble substances occurs (Margin below)

Claims (1)

[Claims] 1. (A) Inorganic or organic peroxide; (B) General formula (I) ▲There are numerical formulas, chemical formulas, tables, etc.▼(I) (In the formula, R^1 is the number of carbon atoms 1 to 6 alkyl group, alkenyl group, alkoxy group, or allyl group, M is hydrogen or a counter ion that forms a salt, and m/n = 3/7 to 10/0) Molecular weight 800 ~100,000 maleic acid homopolymer or copolymer and polystyrene sulfonic acid or a salt thereof or a partially neutralized salt thereof with a molecular weight of 800 to 100,000 and a degree of substitution of sulfonic acid groups on the aromatic ring of 50% or more. 1. A bleach composition comprising at least one of the following: (B)/(A) in a weight ratio of 1/900 to 1/2.