JPS58108300A - Slurry-like alkaline detergent for cleaning hard surface - 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 The present invention relates to a slurry alkaline cleaning agent suitable for cleaning hard surfaces, especially metal surfaces or cleaning dishes in automatic dishwashers.

Recently, the mechanization and automation of dishwashing has become increasingly popular, and hotels, restaurants, and even ordinary households are becoming more and more 4. II dynamic dishwashers are becoming popular, and mechanization and automation of cleaning hard surfaces such as metal surfaces are also becoming commonplace. A cleaning agent with excellent cleaning power is desired.

Most conventional cleaning agents are in powder form, so the cleaning agent is manually measured and dissolved in a certain amount of water.
A troublesome operation to prepare a washing stock solution is required.

In order to eliminate the troublesome operations mentioned above, some liquid cleaning agents are now being used to systemize and automate dishwashing and to systematize and automate the cleaning of other hard surfaces such as metal surfaces. However, because the content of cleaning agent components is limited, the cleaning power is generally inferior to that of powdered cleaning agents. There are also Jin and K, which provide cleaning compositions for washing dishes in automatic dishwashers.

In addition, it is a slurry-type cleaning agent that is easy for users to handle, safe, and has excellent cleaning power, making it suitable for cleaning hard surfaces such as metal surfaces or for cleaning dishes in automatic dishwashers. The company provides the composition.

The cleaning composition of the present invention has a weight ratio of (within) caustic soda of 5 to
IDl1k (bl caustic potash
15-4o (c) Sodium tripolyphosphate
1O-5591(d) Silicate
5-159I(f) Polyacrylic acid
◎、5～5 小（``ゝ水、
. ~6o,.

(The weight ratio of nine dashi caustic soda and caustic potash is 1 = 3 to 1:
4) as an essential component.

The cleaning agent of the present invention has a systemized and automated cleaning vagina in which water or warm ice is directly injected into the cleaning agent container to melt it, and the injection amount is linked with a cleaning tank concentration detector. Mainly used for cleaning. It is essential that such a cleaning agent has good solubility and that it is a cleaning composition in which the cleaning agent components are uniformly dissolved. Furthermore, it is stable at low temperatures,
The essential condition is that the cleaning composition does not solidify for a long period of time.

In the present invention, a mixed solution of caustic soda and caustic potash is used as the alkaline component, and by setting the weight ratio to 1=3 to 4, phosphorous salt, silicate, and other components are readily dissolved in the cleaning agent system.

Further, by setting the concentration to 20 to 50, the liquid specific gravity is increased, and the slurry solid content is easily dispersed in the liquid. When using caustic soda alone, compatibility with sodium tripolyphosphate is poor, and the concentration of caustic soda is reduced to 15-
With the above, the amount of sodium tripolyphosphate added is 15168
! limited by the degree. A blending ratio of caustic soda and caustic potash of more than 1:4 is not practical because sodium tripolyphosphate will discolor, and furthermore, caustic potash is expensive.

In the present invention, the commonly used anhydrous sodium tripolyphosphate can be used as the sodium tripolyphosphate, but the water utilization rate is 60°C.
Since it takes more than 3 hours, there is a problem with proprietary manufacturing equipment.
Manufacturing problems such as an increase in heat source operating costs arise. Therefore, it is preferable and economical to use sodium tripolyphosphate in the slurry-like highly alkaline cleaning agent of the present invention. An example of the hydrate is hexahydrate. It is also possible to use pyrophosphate type 9 phosphate as other phosphates, but in the former case, it combines with calcium and magnesium in the water, creates water-insoluble salts, and scales inside the washing machine. The latter problem is undesirable because it is highly alkaline and unstable to heat. Therefore, it is preferable to use sodium tripolyphosphate, and it is particularly preferable to use hydrated sodium tripolyphosphate. Furthermore, in the case of a slurry cleaning agent such as the one of the present invention, in order to maintain a homogeneous and long-term stable slurry composition, the particle size must be 5.
It is particularly preferable to use a mesh pass with a size of 50 tatami or more.

The amount of sodium tripolyphosphate in the cleaning agent is 10~! 559
If the content is less than 101jI, sufficient cleaning power cannot be exhibited, and if it exceeds SS-, the fluidity of the slurry will be extremely poor.

Examples of the silicates used in the present invention include powdered anhydrous orthosilicate sodium silicate powder and powdered anhydrous sodium metasilicate powder. If a detergent containing silicate water of crystallization is used, the detergent will solidify, so it is necessary to use an anhydrous salt. Silicates tend to have a high rate of dissolution of caustic alkali in detergents, so they are essential components for maintaining alkaline FRJ111 in the final stages of use of the detergent. In addition, silicates have great cleaning power, and systemized and automated cleaning solution concentration adjustment is generally performed by measuring electrical conductivity, which has the advantage of narrowing the range of automatic control. Note that the silicate used has solubility and maintains a stable slurry form with sodium tripolyphosphate for a long period of time.1. for,! It is particularly preferred to use a powdered anhydride having a mesh pass of 50 or more. In addition to sodium silicate, potassium salt can also be used as the silicate; however, when a mixed alkali as in the present invention is used, it is sufficient to use the inexpensive sodium salt of KTh. Such silicates require 5-15% in the detergent, and if it is less than 5%, the detergency and alkalinity maintenance are poor.
If it exceeds 15-1, crystal growth will occur inside the slurry, which is preferable.

Isoa i used as a surfactant in the present invention
As a copolymer of L// and maleic anhydride, the respective monomer components are copolymerized in a ratio of 1:1, and the molecular weight is S.
, 000 F-7,000 is preferable. The surfactant used in the present invention has strong alkali resistance and extremely low weight, which is an essential condition for mechanical cleaning. Furthermore, the metal chelating power is large enough to tame polyacrylic acid, and the cleaning power is excellent. In the case of a slurry-like alkaline cleaning agent such as the one of the present invention, the surfactant-containing grains improve the fluidity of the solid content of the cleaning agent, play the role of accelerating the concentration of the solid content, and further increase the KFi cleaning agent component. It has a very large effect in that it can be dissolved as a homogeneous component. In books using copolymers of maleic anhydride and ethylenic monomers, there are examples in which ethylene, propylene, and butylene are used. A copolymer with maleic acid has excellent detergency and has a small viscosity-thinning effect, making it effective for q#. It is preferable that the above-mentioned surfactant is contained in the detergent in an amount of 0.5 to 10. If it is less than 0.5, the effect of detergency and the effect of increasing the dissolution rate of the detergent will be diminished, and if it exceeds 10 g II, It is preferable to reduce the concentration of molten metal such as sodium tripolyphosphate and silicate dissolved in the cleaning agent solution.

In the present invention, polyacrylic acid is used as a thickener. The thickener plays an important role in dispersing and stabilizing the solid content of the slurry and keeping the slurry homogeneous. The molecular weight of polyacrylic acid is 400.000 to 400.000. Goo's is preferred. Although it is possible to use sodium polyacrylate as a thickener, it is undesirable because it tends to form so-called "ttζ1" particles during production.It is recommended that polyacrylic acid and acid be contained in the cleaning agent in an amount of 0.5 to S. (If it is less than 0.5, the thickening effect will be small, and if it exceeds 5, the fluidity of the slurry will be poor.

Furthermore, the cleaning agent of the present invention contains 40 to 60 gallons of water as the balance.

The cleaning agent of the present invention may contain other ingredients, such as chlorine bleaching agents such as hypochlorite and dichloroincyanurate, or oxygen bleaching agents such as percarbonate and perborate. By adding the agent, the cleaning performance is improved. In the case of lint, these oxidizing bleaches are partially decomposed by the trace amounts of heavy metals contained in the silicate, and the generated oxygen gas has the effect of floating the solid content, which is desirable, but on the other hand, it causes a secondary problem of container damage. If possible,
It is preferable to add an antifoaming agent to the mix at the time of use, and it is also possible to add an antifoaming agent.This will suppress the foaming of the cleaning solution when cleaning metals or inside an automatic dishwasher, etc. The foam disappears quickly and has the advantage of being able to be cleaned without the trouble of foam.

The composition ratio of the cleaning agent of the present invention depends on the hot water temperature of the cleaning agent at the time of use, but when it is used for dishwashing in an automatic dishwasher at a cleaning agent concentration of 0.2 Preferable composition ratios are as follows, assuming that the cleaning concentration is 50% and is used for cleaning metal surfaces, etc.

In any of the cleaning agents having the preferred compositions listed in -F, it is desirable to control the amount of alkaline component so that the pH value of the 196 aqueous solution is 12 or more, and if the pH value of the 19G aqueous solution is smaller than that, The cleaning power may deteriorate.

The cleaning agent of the present invention is suitable for cleaning hard surfaces, such as metal, glass, ceramic, plastic, etc., and is suitable for cleaning dishes in automatic dishwashers.

Cleaning of metal materials 1. Various containers, tanks, and equipment used in the food industry or chemical industry 1. Can be used for cleaning workplaces and other transportation vehicles such as tank vehicles and container vehicles.

The slurry cleaning agent of the present invention is a cleaning agent! ! Put the cleaning agent in the container, pour trap water or warm water into it and dissolve it.
The dissolved cleaning agent can be introduced into the washing machine and used for automatic cleaning, and is a cleaning agent that has an excellent cleaning effect and is so-called no-handling.

Next, the present invention will be explained in more detail by showing an example of 11m.

Example 1 The slurry conditions and the concentrations of sodium tripolyphosphate and sodium metasilicate in the cleaning agent separated liquid were measured for the five types of cleaning agents shown in Table 1 below, and the results are shown below. was gotten.

□ Table 1 Note) Medium hexahydrate 50 mesh pass 5091 or higher - 51:1 copolymer 9 molecular weight a, oo.

The detergent of the present invention having a medium ζ molecular weight of 500,000 and a composition of 4.5 was stable for more than 4 months, and was in the form of a stable slurry that did not freeze even at -10°C. (&4Fi The ratio of caustic soda and caustic potash is 1:
3, and Mu5Fi is also an example of 1:4. ) Example 2 Dissolution rate measurement test The dissolution rate was measured for the four types of formulations shown in Table 2 below, and the results shown in Table 3 were obtained.

Measurement conditions A constant temperature water bath was adjusted to the specified temperature, and a 20F cleaning agent was placed inside the tosho in a 500-degree beaker.

Add 2801lIj of dissolving water at the same temperature as the constant temperature water bath along the wall of the beaker, maintain the stirrer at a constant speed and at a constant distance so that the cleaning agent does not roll up, and calculate the time required for the solid content of the slurry to completely dissolve. It was measured.

Table 2 Table 3 (Dissolution rate: 2 seconds) As is clear from Table 3, the dissolution rate of the detergent containing the copolymer of isoamylene and maleic anhydride is extremely high.

Example 3 Cleaning power test Cleaning conditions Cleaning agent concentration 0.291 Water temperature 60°C Cleaning time 45 seconds Model of automatic dishwasher used IHI-DW-6 Model Washed Artificial dirt (beef tallow: egg: wheat flour) The detergency measurement results for the five formulations shown in Table 4 below are as follows.

Table 4]], 50 Note) -1 to Umbrella ζ are the same as in Table 1. Medium 51:1 copolymer, molecular weight approximately 6,000 Umbrella6 Commercial product Powder form Furthermore, the main effect is 0.73. If there is a difference [Fi99 regret m*, and if there is a difference of 0.5B, ke9! There is a significant difference in reliability. As is clear from Table 4, the isoamylene-maleic anhydride copolymer is more bispecific than other ethylene monopolymers, and copolymers of zuma and maleic anhydride. Easy to clean.

Applicant's agent Kaoru Furutani

Claims (1)

[Claims] In terms of weight ratio, (al caustic soda 5
~10 Arrogant 6) Caustic Potassium 1
5-4o arrogance (c) Sodium tripolyphosphate
10,3159g (tl) Silicate 5-1
5g4(f) HolJ7 Acrylic Acid
0.5-5% (g) water 40-40m
(However, the weight ratio of caustic soda and caustic potash is 1=s~1
A slurry-like alkaline cleaning agent containing (4) as an essential ingredient.