JPH0631409B2 - Thickener for cleaning agents - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] Thickeners are usually used for cleaning agents, that is, shampoos, rinses, face washing foams, or liquid detergents for kitchens in order to improve performance and improve the image of products. There is. TECHNICAL FIELD The present invention relates to a thickener for a detergent, which exhibits excellent thickening properties when used in combination with various kinds of surfactants commonly used as a main component of a detergent, enhances foamability and improves low temperature stability.

[Problems to be Solved by Prior Art and Invention] Conventionally, as a thickener, diethanol amide, water-soluble polymer (methyl cellulose, sodium alginate, carboxymethyl cellulose, etc.), water-soluble inorganic salt such as salt, polyethylene glycol distearate Are used. It has been pointed out by the US Food and Drug Administration that N-nitrosodiethanolamine contained in diethanol amide is carcinogenic, which may cause a problem in use in the cosmetic field where safety is important.

Since the water-soluble polymer lacks stability to metal ions, its use range may be limited in combination with a surfactant.

Similarly to the water-soluble polymer, the inorganic salt may undergo salt exchange in combination with a surfactant.

When polyethylene glycol distearate is added in an amount necessary for producing a desired viscosity, foaming property may be hindered.

Further, glycerin lauric acid ester and glycerin coconut oil fatty acid ester, which are food additives, also have a thickening effect, which is preferable from the viewpoint of safety, but there is a problem in low temperature stability.

[Means and Actions to be Solved by the Invention]

The inventors of the present invention have made intensive studies for the purpose of developing a thickener for detergents that solves the above problems, namely, safety, stability in combination with a surfactant, stability at low temperature storage, and foamability. As a result, it was found that, among the propylene glycol monofatty acid esters recognized as food additives, a specific propylene glycol monofatty acid ester solves these problems and exhibits an excellent thickening effect.

The monoester content of the propylene glycol fatty acid ester is preferably 90 to 100%, preferably 95 to 100%.
Is. 10 propylene glycol difatty acid esters
% Or more, the thickening effect is lowered and the foaming property and the low temperature storage property are impaired.

The main component of the constituent fatty acid of the product of the present invention is composed of one or more fatty acids of a linear saturated fatty acid having 8 to 14 carbon atoms and / or an unsaturated fatty acid having 18 carbon atoms. That is, caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, oleic acid, linoleic acid, linoleic acid and mixed acids thereof. As long as the above fatty acid is the main component, there is no problem even if a small amount of linear saturated higher fatty acid having 16 or more carbon atoms is contained, and for example, coconut oil fatty acid, soybean oil fatty acid, rapeseed oil fatty acid derived from natural fats and oils may be used.

Further, the thickener of the present invention exhibits excellent thickening properties when used in combination with anionic, nonionic, cationic and amphoteric surfactants which are the detergent components of detergents. Especially when used in combination with an anionic surfactant, a remarkable effect is exhibited.

Specific examples of the anionic surfactant include alkyl sulfate ester salts, polyoxyethylene alkyl sulfate ester salts, alkylbenzene sulfonates, α-olefin sulfonates and the like.

The thickener of the present invention may be used not only as an anionic surfactant but also as a combined system. Other non-ion,
It may be used in a combination system with a cation and an amphoteric surfactant.

The thickener of the present invention may be used in a mixture containing other substances, if necessary.

For example, in order to further improve the low temperature storage property of the thickener of the present invention and the solubility in a surfactant, the thickener of the present invention and polyglycerin fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyoxyethylene higher alcohol, etc. In order to further improve the foamability and foam quality of the thickener of the present invention, the thickener of the present invention and glycerin monolauric acid ester, glycerin monococonut oil fatty acid ester, glycerin monopalm kernel oil fatty acid ester May be mixed.

When the thickener of the present invention is added to a detergent, the addition amount may be in the range of 5 to 40% based on the detergent, depending on the formulation of the detergent, the type of the surfactant used and the desired viscosity. Can achieve the purpose.

[Effects of Examples and Invention]

Next, the present invention will be specifically described by showing Examples and Comparative Examples of the present invention.

In this test, the following 3 which are commonly used as cleaning ingredients
Some anionic surfactants were used.

1) Sodium lauryl sulfate (hereinafter abbreviated as AS-Na) 2) Polyoxyethylene (EO = 3) sodium lauryl sulfate (hereinafter abbreviated as AES-Na) 3) Polyoxyethylene (EO = 3) lauryl sulfate triethanolamine ( (Hereinafter abbreviated as AES-TEA) Test method Viscosity test General-purpose thickener, comparative product, viscosity change when the present invention is added is measured at 25 ° C using a B-type viscometer Foamability test (JIS-3362) Los Miles The bubble height at 40 ° C. is measured by the method. However, in order to comply with the JIS test conditions, the test was conducted at a low addition amount outside the normal use range.

Low temperature storage property Evaluation of low temperature storage properties (presence or absence of crystal precipitation) at 0 ° C and -5 ° C in a viscosity test formulation.

○ -good-transparent △ -somewhat good-somewhat transparent × -poor-precipitation The composition of the example product (the product of the present invention) and the comparative example product in this test is shown in the table below, and the results of each of these tests are shown in Table 1-1. ~ Table 1
-3, Table 2-1 to Table 2-3, and Table 3-1 to Table 3-3.

Claims (1)

[Claims] 1. A linear saturated fatty acid having 8 to 14 carbon atoms and / or a linear saturated fatty acid having 18 to 14 carbon atoms and a monoester content of propylene glycol fatty acid ester of 90 to 100%, or one of unsaturated fatty acids having 18 carbon atoms, or A thickener for detergents, which comprises a fatty acid containing two or more kinds as main components.