JPH0774358B2 - Rinse aid - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to compositions suitable for use as rinse aids in automatic dishwashers for washing dishes, cookware, crates and the like.

[Problems to be Solved by Prior Art and Invention]

The washing method using an automatic dishwasher is generally a washing step by spraying an aqueous alkaline detergent solution, and rinsing by spraying an aqueous rinsing aid solution heated to 80 to 90 ° C.
It consists of a drying process.

The above rinse aid used here is desired to have the following features.

Water droplets adhering to the surface of the tableware during drying should disappear quickly, so-called drying accelerator.

Do not leave water spots or stains on the surface of the tableware after drying.

Even if a small amount of the rinsing aid component remains on the surface of the tableware, it has a high level of safety without affecting the human body.

Conventionally, as the rinse aid, surfactants such as sucrose fatty acid ester, glycerin fatty acid ester, sorbitan fatty acid ester, propylene glycol fatty acid ester, polyglycerin fatty acid ester, propylene oxide-ethylene oxide block polymer are used alone or in combination. There is.

However, among these, polyhydric alcohol fatty acid esters such as sucrose fatty acid ester, glycerin fatty acid ester, sorbitan fatty acid ester, propylene glycol fatty acid ester and polyglycerin fatty acid ester have high safety, but water spots on the tableware surface after drying are high. It is not satisfactory in terms of performance, because it has the drawback that stains remain and it takes time to dry the dishes.

Further, the propylene oxide-ethylene oxide block polymer is slightly superior in performance as compared with the above-mentioned polyhydric alcohol fatty acid ester, but also has a drawback that water spots and stains remain on the tableware surface after drying. Furthermore, it is hard to say that this product is guaranteed to be safe for the human body.

Further, JP-A-61-276900 describes a rinsing aid using lecithin. Normal commercial lecithin contains 30 to 40% oil and fat. High-purity lecithin from which oil and fat has been removed is also commercially available. However, although these commercially available lecithins may contain several% of monoacyl compounds, both are composed of diacylphosphatide, and even if these lecithins are used as a rinse aid,
The rate of drying tableware is slow, and water spots and stains remain on the surface of the tableware after drying, so that almost no performance as a rinse aid can be obtained.

If water spots or stains are left on the surface of the tableware, especially in glass cups, etc., because the tableware is transparent, the water spots or stains are conspicuous and spoil the appearance. Also,
When the drying speed of the dishes is slow, busy restaurants such as family restaurants need to quickly organize the dishes after the washing work in the cupboard, so they have to be stored in a completely dry state. There are also concerns about hygiene.

On the other hand, in the crate cleaning, a huge amount of energy is consumed such as applying hot air in order to perform the drying quickly.

Therefore, the first object of the present invention is to provide a rinse aid which does not leave water spots or stains on the surface of tableware or crate after drying.

A second object of the present invention is to provide a rinsing aid having an effect of promptly eliminating water droplets adhering to the surface of tableware and the crate after the rinsing step.

A third object of the present invention is to provide a highly safe rinsing aid that does not affect the human body even if a small amount of rinsing aid remains on the surface of tableware or crate.

[Means for solving problems]

The present invention has achieved the above object by providing a rinse aid characterized by containing lysophosphatide as an essential component.

Hereinafter, the rinse aid of the present invention will be described in detail.

Lysophosphatide, which is an essential component of the rinse aid of the present invention, is obtained, for example, by partially hydrolyzing diacylphosphatide contained in animal components such as plant seeds or eggs with phospholipase A. To be By using this lysophosphatide, which is a requirement that the rinse aid should have, water droplets adhering to the surface of the tableware during drying disappears quickly, and has the performance as a so-called drying accelerator, In addition, by not leaving water spots or stains on the surface of the tableware after drying, an excellent effect not seen before is exhibited.
Furthermore, the above-mentioned lysophosphatide used in the present invention is a substance derived from a natural product, and its safety is very high.

The lysophosphatide used in the present invention can be changed in various ratios of lysophosphatide and diacylphosphatide with respect to the total amount of phosphatide, depending on the conditions and the fractionation method for partial hydrolysis of diacylphosphatide. It is possible to change the ratio of lysophosphatidylcholine, lysophosphatidylethanolamine, lysophosphatidylinositol, lysophosphatidic acid, and lysophosphatidylserine in lysophosphatid. Practically, lysophosphatid (a) is one selected from the group consisting of lysophosphatidylcholine, lysophosphatidylethanolamine, lysophosphatidylinositol, lysophosphatidic acid and lysophosphatidylserine. Or two or more types of lysophosphatide Are those having these lysophosphatidyl de (a) is the lysophosphatidyl de (a)
When the diacylphosphatide (b) corresponding to is further contained, the amount of lysophosphatide (a) is 10% by weight or more based on the total amount of phosphatide [(a) + (b)]. preferable.

The constituent fatty acids of lysophosphatide and a mixture of lysophosphatide and diacylphosphatide used in the present invention include transesterification of saturated / unsaturated fatty acids having 6 to 22 carbon atoms with phospholipase A. It may be one.

The rinse aid of the present invention may contain a polyhydric alcohol fatty acid partial ester as a preferable component.

Examples of the polyhydric alcohol fatty acid partial ester include partial esters of polyhydric alcohol and fatty acid selected from the group consisting of sucrose, glycerin, polyglycerin, propylene glycol, sorbitan, sorbitol and sorbite.

The polyhydric alcohol fatty acid partial ester is preferably one whose constituent fatty acid is a saturated or unsaturated fatty acid having 6 to 24 carbon atoms.

The amount of the polyhydric alcohol fatty acid partial ester used is preferably such that the weight ratio of the lysophosphatide and the polyhydric alcohol fatty acid partial ester is 1:99 to 99: 1.

If desired, the rinsing aid of the present invention may include water, glycerin, diglycerin, polyglycerin, sorbitol, propylene glycol, solvents such as ethanol, citric acid, gluconic acid, malic acid, ethylenediamine tetraacetic acid and salts thereof. It goes without saying that the chelating agent, sodium benzoate, methyl hydroxybenzoate, dehydroacetic acid, preservatives such as ethyl paraoxybenzoate, salicylic acid, etc., fragrances, colorants, defoaming agents and the like can be appropriately added.

In order to produce the rinse aid of the present invention, in addition to the lysophosphatide which is an essential component, the polyhydric alcohol fatty acid partial ester and, if necessary, a solvent, a chelating agent, a preservative, a pigment, and a coloring. An agent, an antifoaming agent, etc. may be mixed at any time.

The rinse aid of the present invention may be in any shape such as liquid, solid or dispersed form.

The rinsing aid of the present invention is usually diluted with hot water at 80 to 90 ° C. to about 1,000 to tens of thousands times and sprayed on the article to be washed. The concentration of lysophosphatide in the diluted aqueous solution of is preferably 0.1 ppm or more.

〔Example〕

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.

Examples 1 to 15 and Comparative Examples 1 to 6 Rinse aids were obtained by the compounding compositions shown in Table 1 below (surfactant amount 20% by weight, but only Example 15 surfactant amount 50% by weight). .

The performance of each of the obtained rinse aids was evaluated as follows. The results are shown in Table 2 below.

Using the following automatic dishwasher, wash the glass cup and melamine dish with the following alkaline cleaner, then rinse with the rinse aid diluted aqueous solution of 80 ° C diluted with hot water to 1 / 20,000. . The drying rate of the tableware after rinsing and the water spots and stains remaining on the tableware after drying were evaluated by the following evaluation methods. The concentrations of lysophosphatide in the rinse aid diluted aqueous solution are shown in Table 2 below.

Washing machine: IHI-JWD6 type Cleaning agent: Made by ADEKA CLEANAID, Washmate L, H (0.2%) Evaluation method: Washing 8 glass cups and 8 melamine dishes, average number of water spots and stains and complete The average time to dry was measured.

(Effect of the invention) The rinsing aid of the present invention extremely reduces water spots and stains remaining on the tableware and crate surface after drying, and quickly eliminates water drops attached to the tableware and crate surface after the rinsing step, It has an excellent effect that it accelerates the drying speed of tableware, and even if a small amount remains on the surface of the tableware or the crate, it does not affect the human body and is highly safe.

Claims (5)

[Claims] 1. A rinse aid containing lysophosphatide as an essential component. 2. A polyhydric alcohol fatty acid partial ester as set forth in claim 1, further comprising:
A rinse aid as described in the item. 3. A polyhydric alcohol fatty acid partial ester is a partial ester of a polyhydric alcohol and a fatty acid selected from the group consisting of sucrose, glycerin, polyglycerin, propylene glycol, sorbitan, sorbitol and sorbite. Rinsing aid according to claim (2). 4. The lysophosphatid (a) is selected from the group consisting of lysophosphatidylcholine, lysophosphatidylethanolamine, lysophosphatidylinositol, lysophosphatidic acid and lysophosphatidylserine. One or two or more kinds of lysophosphatides are contained, and when these lysophosphatide (a) further contains diacylphosphatide (b) corresponding to the lysophosphatide (a), The rinsing aid according to claim (1), wherein the amount of lysophosphatide (a) is 10% by weight or more based on the total amount of phosphatide [(a) + (b)]. Agent. 5. Rinsing according to claim (2), characterized in that the weight ratio of lysophosphatide (a) to the polyhydric alcohol fatty acid partial ester is 1:99 to 99: 1. Auxiliary agent.