JPS6036598A - Novel detergent composition for dish washer and manufacture - Google Patents

Abstract

1. A washing compound suitable for washing crockery in dishwashers, comprising as a percentage by weight relative to composition : - 25 to 60% softening agent selected from polyphosphates, - 30 to 70% alkalinising agent selected from sodium salts containing sodium metasilicate, - 0.5 to 4% non ionic surface-active agent, - 0.5 to 5% coated trichloroisocyanuric acid, characterised in that the trichloroisocyanuric acid is coated using a polyethylene wax in a proportion of 0.5 to 10% by weight relative to the weight of the acid, the said wax having a mean molecular weight of approximately 2 500, a low melting point of less than 70 degrees C, a dripping point of 70 to 80 degrees C with a density of 0.86 to 0.88.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel detergent composition suitable for washing dishes in a dishwasher and a method for producing the same.

Washing dishes in a dishwasher involves both the cleaning action of detergent and the mechanical action of water. Apart from the cleaning action, the cleaning agent must also have bactericidal and water softening action. Therefore, the cleaning agent must have a strong cleaning power, but at the same time its composition must not lead to the formation of foam, which is an obstacle to the mechanical action of water.

The components of known cleaning agents are shown below.

(a) Softeners generally selected from various polyphosphate salts. As the polyphosphates used, mention may be made, for example, of sodium tripolyphosphate, sodium hexametaphosphate, sodium pyrophosphate and the corresponding potassium salts of these polyphosphoric acids.

(b) Alkaline boosters consisting of sodium salts, including sodium metasilicate in anhydrous or trihydrate form. As is known, IJium silicate can be partially replaced by sodium carbonate, sodium sulfate or sodium hydroxide.

(C) Compounds of the following: ethoxylated linear alcohols, condensates of ethylene oxide and propylene oxide, alkoxyamines, polyethoxyethers of aliphatic alcohols, ethoxylated alkylphenols or phosphorus of aliphatic alcohols. A non-foaming, non-ionic surfactant selected from acid ertel. Effectiveness,
From the viewpoint of biodegradability and cost, the surfactant is preferably selected from among various ethoxylated linear alcohols.

(d) Fungicide.

Chlorine-containing solid compounds that release active chlorine are known as disinfectants. Most commonly used are the sodium or potassium salts of dichloroisocyanuric acid or trichloroisocyanuric acid.

For example, anhydrous sodium dichloroisocyanurate with an active chlorine titer of 63%, sodium dichloroisocyanurate trihydrate with an active chlorine titer of 56%, and an active chlorine titer of 59%.
% of anhydrous potassium dichloroisocyanurate, potassium dichloroisocyanurate hydrate with an active chlorine potency of 56%, calcium dichloroisocyanurate tetrahydrate with an active chlorine potency of 56%, and active chlorine potency of 91%. Trichloroisocyanuric acid can be used.

Active chlorine is defined here as oxidizing ability derived from positive chlorine. To understand what positive chlorine is,
The chlorine present in the above chlorinated derivatives is bonded to the nitrogen atom and is in the +1 oxidation state in the compound, i.e. C1
We should remember that it exists as +.

During the oxidation-reduction process, the C1+ ion combines with two electrons to become a C1+ state (chloride). During this time, 2 equivalents of oxidant are released, which corresponds to 71 g of elemental chlorine, although the atomic weight is only 35.5. This also means that C
This means that an I+1 atom has the same oxidizing ability as 1 mole of elemental chlorine.

The object of the present invention is to use a chlorine-containing disinfectant of the inchlorocyanurate group that has the highest amount of active chlorine. Therefore, the most advantageous chlorine-containing disinfectant is trichloroisocyanuric acid, which has a titer of 91% active chlorine. Unfortunately, however, as the amount of active chlorine in the inchlorocyanuric acid derivative increases, the reactivity of the derivative with the surfactant increases. Therefore, cleaning agents containing inchlorocyanuric acid derivatives are unstable on storage. This is because significant amounts of both chlorine and surfactant are lost through mutual destruction. This instability is particularly pronounced in the case of trichloroisocyanuric acid.

A method has now been found to stabilize isochloroisocyanuric acid derivatives, thereby producing cleaning compositions that are storage stable and suitable for washing dishes in a dishwasher, even when trichloroisocyanuric acid is used. It became possible.

The present invention contains a softening agent selected from various polyphosphates, an alkaline strength enhancer selected from various sodium salts including sodium metasilicate, a nonionic surfactant, and a chloroin cyanuric acid derivative, The acid derivative is 0.5 to 0.5 based on the weight of chloroin cyanuric acid.
A novel cleaning composition suitable for washing dishes in a dishwasher, characterized in that it is coated with a polyethylene wax used in a concentration of 10% by weight.

Polyethylene wax was found to be compatible with isochlorocyanuric acid derivatives. Moreover, good stability can be achieved when relatively small amounts are used. Additionally, polyethylene waxes can be dispersed in water at temperatures of 50-65°C.

The polyethylene wax has an average molecular weight of about 2.500, a low melting point below 70°C, a melting point of 70-80°C and a
It consists of polyethylene with a specific gravity of 6-088.

The polyethylene wax contains 0.5 to 10% by weight, preferably 3 to 5% by weight based on the coulometric amount of the isochlorocyanuric acid derivative.
Used in a concentration of % by weight. If it exceeds 5% by weight, coating becomes difficult and it becomes necessary to change the coating conditions.

When used in amounts greater than 10% by weight, there is no appreciable improvement in the storage stability of the cleaning composition;
,,． 5'? Amounts below 1% U do not provide significant stability.

The cleaning composition that is the subject of the present invention is produced by first coating an isochlorocyanuric acid derivative with polyethylene wax. This coating can be carried out using any type of industrial mixer, such as a drum mixer, preferably a mixer with a heating device.゛The melted wax is about 5
It is also possible to use a rotary mixer of the concrete mixer type, which is sprayed onto the inchlorocyanuric acid derivative heated to a temperature of 0°C. Using this temperature, the polyethylene wax disperses well and solidifies upon cooling. The wax-coated isochlorocyanuric acid derivative is then mixed with the other components of the cleaning agent in another mixer.

The amounts of the various ingredients used in the preparation of the novel cleaning compositions that are the subject of this invention use conventional weight proportions. Various Po IJ
The softening agent selected from the IJ salts is used at a concentration of 25 to 60% by weight, preferably 40 to 50% by weight, based on the weight of the composition.

The alkaline strength enhancer selected from various sodium silicates is present in an amount of 30 to 70% by weight, preferably 4% by weight based on the weight of the composition.
It is used at a concentration of 0 to 60% by weight. As is known, sodium silicate can be partially replaced by sodium carbonate, sodium sulfate or sodium hydroxide. The nonionic surfactant may be present in an amount of 0.0% by weight of the composition.
It is used at a concentration of 5 to 4% by weight, preferably 1 to 3% by weight. The isochlorocyanuric acid derivative coated with polyethylene wax is 0.5 to
It is used at a concentration of 5% by weight, preferably 1-3% by weight.

The present invention will be explained below with reference to Examples.

Example 1 Trichloroisocyanuric acid is first stabilized with polyethylene wax in the manner described below.

Heat the nucleic acids to 50°C and place in a rotating mixer.

While the mixer is running, spray the polyethylene wax with a spray gun. With this temperature the wax is well dispersed and solidifies upon cooling. The polyethylene wax used has a melting point of 70°C or lower, 70-80°C.
It has a dropping point of °C and a specific gravity of 0.86-0.88.

By varying the proportion of polyethylene wax, various mixtures of acid and wax are obtained. The mixture thus obtained is used for producing a cleaning composition.

A cleaning agent having the following composition was prepared ('part' indicates the heaviest part).

(a) Sodium tripolyphosphate: 50 parts (b) Metasilicate) IJium (anhydrous or pentane): 50 parts (c) PLIIRAFACRA 43 (PCLIK
(d) Trichloroin cyanuric acid coated with polyethylene wax: 2 parts (d) Trichloroin cyanuric acid coated with polyethylene wax: 2 parts. Mix in advance. 2
A homogeneous mixture is obtained after 0 minutes. The metasilicate is then added to the mixture and after 20 minutes the coach-inked trichloroisocyanuric acid is added. The entire composition is then placed in a rotating mixer for 20 minutes.

The chlorine ratio in the cleaning composition measured by iodometric titration was 1.65%.

The thus applied cleaning composition is placed in a plastic bag and closed with a non-airtight lid. The bag is placed in an oven in a controlled environment under the following conditions: Store inside.

After a storage period of 2 to 3 months, samples were taken out and residual chlorine was measured by iodometric titration.

Table 1. anhydrous sodium metasilicate or metasilicate)
The results after 80 days storage of cleaning compositions made with IJum pentose hydrate and trichloroin cyanuric acid coated with various weight percent polyethylene wax are shown. Results regarding residual chlorine are expressed as % compared to the initial salt Si.

Table 1゜Example 2゜Example 1 was repeated using trichloroisocyanuric acid coated with various amounts of polyethylene wax,
Residual chlorine was measured after 70 days of storage. The obtained results are shown in Table 2. Expressed in

Table 2゜Example 3゜Example 1. Under the same conditions, anhydrous sodium chlorocyanurate (DCC) was used instead of trichlorocyanuric acid.
A Na) and inchloron sodium anurate dihydrate (D CCNa.2H20) were used. Coating was performed with 5% polyethylene wax.

The cleaning agent was the same as Example 1. was produced in the same manner as above, except that sodium metasilicate pentadide was used.

Samples were removed after various storage periods.

FIG. 1 shows the % residual chlorine as a function of storage period in the case of DCCNa.2H20, and FIG. 2 shows the % residual chlorine in the case of DCCA Na.

[Brief explanation of drawings]

Figure 1 shows the percentage of residual chlorine as a function of storage period in the case of D CCNa 2H20.
FIG. 2 similarly shows the percentage of residual chlorine in the case of DCCA Na as a function of storage period. Patent Applicant Sociétémique Descharbonage Niss, AR. Representative Patent Attorney Masahiko Arai

Claims (4)

[Claims] (1) A softening agent selected from various polycarbonate salts;
Containing an alkaline booster selected from various sodium salts including sl-lium metasilicate, a nonionic surfactant and a coated chloroisocyanuric acid derivative,
The chloroisocyanuric acid derivative has a weight of 0.
characterized by being coated with polyethylene wax used in a concentration of 5-10% by weight,
A new detergent composition suitable for washing dishes in a dishwasher. (2) 3 to 5% by weight of the chloroisocyanuric acid derivative
A novel composition according to claim 1, characterized in that it is coated with a polyethylene wax having a concentration of . (3) A novel dishwashing agent for use in a dishwasher, characterized in that a chloroisocyanuric acid derivative is first coated with polyethylene wax and then the chloroisocyanuric acid derivative is mixed with other components of the cleaning agent. Method of manufacturing the composition. (4) During the coating, the melted wax is at 50°C.
4. A method for producing a novel detergent composition according to claim 3, wherein the composition is sprayed onto the chloroisocyanuric acid derivative heated to .