JPS6160797A - Liquid detergent in container - 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 liquid cleaning agent contained in a synthetic resin container.

Liquid detergent compositions are excellent in terms of light weight and ease of handling, and are usually stored and used in a state where the liquid detergent composition is stored in a container made of synthetic resin. In addition to sulfonate-type and sulfate-type anionic surfactants and nonionic surfactants, the liquid cleaning composition mainly contains oleic acid to strengthen the detergency of mud stains, and if necessary, builder and chelate. It contains agents, hydrotropes, etc. Conventionally, such liquid cleaning agents have had the disadvantage of discoloration during storage.

Methods for preventing discoloration of liquid cleaning compositions during storage are reported in, for example, Japanese Patent Publications No. 46-16757, Japanese Patent Publication No. 54-38605, and Japanese Patent Application Laid-Open No. 56-36597. However, all of these problems are based on a combination of a detergent containing a synthetic anionic surfactant and a discoloration inhibitor, and they have not been fundamentally solved and are still unsatisfactory.

i! l! 2J Watomo The present inventors conducted extensive studies with the aim of preventing discoloration during storage of containerized liquid detergents containing oleic acid, and found that the content of linoleic acid and lylunic acid contained in oleic acid was Based on this knowledge, we have discovered that by reducing the amount of titanium oxide contained in the resin of the container to below a specified value, we can prevent discoloration of the cleaning agent. As a result, the present invention was completed.

That is, the container-packed liquid cleaning composition of the present invention is a liquid cleaning composition containing oleic acid, in which the linoleic acid content is 7 and O3i amount% or less, and the linoleic acid content is 1.゜7% by weight or less of oleic acid
-30% by weight, and the synthetic resin container is characterized by being formed from a synthetic resin having a titanium oxide content of 1% by weight or less.

The present invention will be explained in more detail below.

The oleic acid used in the liquid cleaning agent of the present invention is
The content of linoleic acid contained as an impurity is 7. Ovt.
% or less, and the content of lylunic acid is 1.7vt%
It is as follows. In addition, the linoleic acid content was increased to 5. Ovt% or less, and it is more preferable that the lylunic acid content is 1.5 wt% or less.

If oleic acid with a linoleic acid content of more than 7.0 wt% or a linolenic acid content of more than 1.7 vt% is used, the liquid detergent composition will significantly discolor during storage. Acids include, for example, olive oil,
Camellia oil, beef tallow.

It is obtained by hydrolyzing animal and vegetable oils such as rice bran oil, separating glycerin, removing solid fatty acids, distilling, and further refining this.

Oleic acid is blended in the liquid cleaning composition in an amount of 1 to 30 wt%, preferably 5 to 20 wt%. This amount is lvt%
If it is less than 30wt, the cleaning power will be insufficient.
If it exceeds %, discoloration during storage will become significant. In liquid cleaning compositions, oleic acid is present in acid or salt form. The above-mentioned allowable amounts of linoleic acid and linoleic acid, which are impurities, are values when the total amount is converted into acid.

The liquid cleaning composition of the present invention further includes surfactants such as sulfonate-type, sulfate-type, and phosphate-type anionic surfactants and nonionic surfactants, condensed phosphates, carbonates, silicates, polyethylene glycol, Builders such as carboxylic acids or their salts, chelating agents such as sodium nitrilotriacetate, sodium ethylenediaminetetraacetate, and zeolites, pH adjusters such as caustic soda, caustic potash, ammonia, and alkanolamines, lower alcohols, polyhydric alcohols, and lower allyl sulfonates. It can contain hydrotropes such as, enzymes, optical brighteners, fragrances, pigments, etc.

Examples of anionic surfactants include C1-3□ linear or branched alkylbenzene sulfonate, cs,
Sulfonate-type anionic surfactants such as xs long-chain olefin sulfonates, C,-1 long-chain alkyl sulfate salts, polyoxyethylenes with an alkyl group of 8 to 22 carbon atoms and an average number of added moles of ethylene oxide of 1 to 6 Alkyl ether sulfate salt, alkyl group has 8 or more carbon atoms
Sulfate-type anionic surfactants such as polyoxyethylene alkylphenyl ether sulfates with 22 and an average number of added moles of ethylene oxide of 1 to 6, long-chain monoalkyl, dialkyl, or sesquialkyl phosphorus with an alkyl group having 8 to 22 carbon atoms. Acid acid, alkyl group has 8 to 2 carbon atoms
Examples include polyoxyethylene long-chain monoalkyl, dialkyl or sesquialkyl ether phosphates having an average number of added moles of ethylene oxide of 1 to 6. Counter ions for these anionic surfactants include alkali or chilkali earth metal ions such as sodium, potassium, and magnesium, ammonium ions, and flukanolamine ions such as monoethanolamine, jetanolamine, and triethanolamine. used.

Nonionic surfactants include, for example, polyoxyethylene long-chain alkyl ethers in which the alkyl group has 8 to 22 carbon atoms and the average number of moles of ethylene oxide added is 1 to 20; A polyoxyethylene alkylene compound such as polyoxyethylene alkylphenyl ether having an added mole number of 1 to 20, C1, to 8. Examples include long-chain tertiary amine oxides. As the p11 regulator, caustic soda, caustic potash, ammonia, and alkanolamines such as monoethanolamine, jetanolamine, triethanolamine, etc. are used, but the pH of one composition is in the range of 6.0 to 11.0. is preferred.

The synthetic resin container used in the present invention is formed from a synthetic resin having a titanium oxide content of lvt% or less. When the content of titanium a oxide exceeds 1 tzt%.

Even with reduced linoleic and linuric acid content.

0 Synthetic resins that cause the liquid cleaning composition stored in the container to noticeably change color over time.

For example, polyethylene terephthalate, polyethylene polypropylene, polystyrene, polyvinyl chloride, etc. are used.

According to the containerized liquid cleaning agent of the present invention, the content of linoleic acid and lylunic acid contained as impurities in oleic acid is suppressed to a predetermined value or less, and the content of titanium oxide contained in the container is suppressed. By setting it below a predetermined value, coloring of the liquid cleaning agent during storage due to aging can be effectively prevented.

The packaged liquid detergent of the present invention is particularly useful as a laundry detergent.

A liquid cleaning composition having the composition shown in Table 1 below was prepared.

On the other hand, various storage containers having a diameter of 45 mm as shown in Table 2 were prepared, 200 mm of the liquid detergent composition was put therein, the containers were sealed tightly, and the containers were stored at 45° C. for one month.

Measure the absorbance of the liquid at a wavelength of 420 nm to evaluate discoloration,
The results are shown in Table 1. If the absorbance exceeds 0.5, the appearance of the product is unsuitable and is not preferred.

(Margins below) Table 1 Oleic acid (■): Linoleic acid content 5wt%, linoleic acid content 1.4wt% Oleic acid (■): Linoleic acid content 10vt%, linolenic acid content 1.4wt% AES -Na: Alkyl group (linear chain rate 50%) carbon number 1
3. Polyoxyethylene alkyl ether sulfate sodium salt with an average number of moles of ethylene oxide added of 3 EDTA-2Na: Disodium ethylenediaminetetraacetate TS-Na: Sodium toluene sulfonate Table 2 Example 2 Same as Example 1, A liquid detergent composition having the composition shown in Table 3 was prepared, placed in a container shown in Table 4, and the container was tightly stoppered, and the absorbance was measured in the same manner as in Example 1.

(Margin below)

Claims (1)

[Claims] 1. In a containerized liquid cleaning agent containing a liquid cleaning composition containing oleic acid in a synthetic resin container, the content of linoleic acid as oleic acid is 7.0% by weight or less, and
1 oleic acid with a linolenic acid content of 1.7% by weight or less
30% by weight, and the synthetic resin container is formed from a synthetic resin having a titanium oxide content of 1% by weight or less.