JPS5923594B2 - liquid cleanser composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a neutral type liquid cleanser, and more particularly to a liquid cleanser composition that has excellent detergency and polishing power and is stable over a wide temperature range over a long period of time.

What is important for a liquid cleanser is that it not only has sufficient cleaning and polishing power as a cleanser, but also that its main component, a water-insoluble polishing substance, is stably dispersed in water over a long period of time. It is that you are.

Conventionally, neutral type liquid cleansers include acidic phosphates and neutral phosphates (molar ratio 1:1.6), abrasives, linyard decylpenzenesulfonate sodium slurry, and coconut oil fatty acid monoethanolamide. A mixture of an ethylene oxide adduct and polyethylene glycol dissolved in pure water is known (Japanese Patent Laid-Open No. 47-22908).

Although this product has the advantage of having excellent cleaning power, polishing power, and stability, when it is frozen at -20℃ or lower and thawed, or left at 50℃ or higher, the water-insoluble polishing substance separates and settles. There is a tendency to In addition, since it contains phosphate, it contributes to the pollution of rivers and oceans due to eutrophication of water, which has become a problem in recent years, and is undesirable from an environmental and social standpoint. Recently, a liquid cleanser consisting of partially cross-linked polyacrylic acid, a hydrodrop agent, a nonionic surfactant, a water-insoluble abrasive, a pH adjuster, and water has been developed as a neutral type liquid cleanser that does not contain phosphates. (Japanese Patent Application Laid-Open No. 54-74810). This product has the advantage of not using phosphates, but it lacks cleaning power because it only uses a nonionic surfactant, and it also has dissolution of carboxyvinyl polymer used as a nonionic surfactant. There are troublesome problems in terms of manufacturing operations, such as control of properties, dispersibility, and pH. As a result of intensive studies to solve these drawbacks of conventional liquid cleansers, the present inventor has developed a combination of linear alkylbenzene sulfonate, particularly soda salt, and fatty acid alkanolamide, particularly coconut oil fatty acid diethanolamide, as surfactants for liquid cleansers. By blending 1 part by weight of ammonium chloride with 2 to 4 parts by weight of urea in a system containing urea, an aqueous solution close to non-Newtonian properties is prepared, and a water-insoluble abrasive substance is blended with this solution, which has been widely used over a long period of time. The present invention was completed by discovering that it has stability in a temperature range.

The present invention uses a linear alkyl benzene sulfonate and a fatty acid alkanolamide as a surfactant, 0.3 to 3.5 parts by weight of the latter per 1 part by weight of the former, and 11 parts by weight of ammonium chloride and urea as a stabilizer. A liquid cleanser composition is used at a mixing ratio of 2 to 4 parts by weight per part of the latter, and a water-insoluble abrasive substance and, if necessary, a builder are blended therein and dispersed in water.

The urea and ammonium chloride used in the present invention are highly safe and have been commonly used in kitchen detergents, etc., and urea itself can be used as a surfactant solubilizer (hydrodorobe) and as an antifreeze agent. Also, ammonium chloride has the function of a buffer and metal abrasive, and its liquid properties belong to the salts of weak acids.

When the mixing ratio of urea exceeds the above range, the water-insoluble abrasive material tends to separate, and the best ratio is 3 parts by weight of urea to 1 part by weight of ammonium chloride. These stabilizers are blended in an amount of about 2 to 15% by weight based on the liquid cleanser, but preferably 4 to 12% by weight.If the amount is more or less than this, signs of separation or temperature dependence may occur. Those containing a large amount of urea are undesirable from both liquid properties and economical points of view. Linear alkylbenzene sulfonates (hereinafter referred to as LAS) used as surfactants are generally those in which the linear alkyl chain is centered on Cl2, and the sulfonate salts are preferably sodium, potassium, or triethanolamine.

It is preferable to neutralize and produce the LAS so that it becomes an aqueous solution of about 25% from the viewpoint of workability and LAS storage stability.

In addition, examples of fatty acid alkanolamides include an oil fatty acid diethanolamide and an oil fatty acid monoethanolamide (
2 mol or 5 mol ethylene oxide adduct) Lauric acid diethanolamide, myristic acid diethanolamide, stearic acid diethanolamide, oleic acid diethanolamide, lauric acid, myristic acid equimole diethanolamide, tallow fatty acid monoethanolamide (ethylene oxide 20 mol) Among them, 1:1-type ammonium fatty acid diethanolamide is preferable from the viewpoint of foamability, hard water resistance, easy compatibility with water, and economical aspects. Both surfactants together contribute to cleaning power, foaming power, hard water resistance, prevention of rough hands, prevention of scum, etc., and are a truly advantageous combination.

If necessary, anion activators such as alphaolefin sulfonate, alkanesulfonate, higher alcohol sulfate, and ethoxy sulfate may be used.
Contains up to 1.5% by weight of nonionic surfactants such as higher alcohols, amine oxides, and other fatty acid derivatives, and amphoteric surfactants such as glycine, alanine, imidazolinium betaine, and alkyl betaine, depending on various purposes. There is no problem with that.

The ratio of LAS to fatty acid alkanolamide is most stable when the latter is 0.3 to 3.5 parts by weight per 1 part by weight of the former, and especially stable when the latter is 0.5 parts by weight, that is, 50% of the amount of LAS used. It is excellent in terms of performance, detergency, and foaming properties. It has been empirically determined that the surfactant is generally used in a content of 10% or less in the case of cleansers, but there is no problem in increasing the amount in relation to water-insoluble abrasive substances.

The water-insoluble abrasive substance is 20 to 70% by weight in the case of liquid type.
Preferably it is 30 to 50% by weight.

If it is more than 70%, the viscosity may increase and fluidity may be impaired, and if it is less than 20%, the polishing action will not be sufficient.

In the case of a water-insoluble abrasive material with a coarse particle size, that is, less than 100 meshes, there is a risk of damaging the equipment used.A water-insoluble abrasive material with a distribution of at least 100 mesh passes, preferably 200 to 400 mesh passes, has a polishing effect and a degree of damage. It is advantageous in terms of relaxation, cost advantages, and water dispersibility during work. Specifically, silica, alumina, silicon carbide, emery, silica sand, white titanium, zinc white, dolomite, pearlite-based abrasives described in U.S. Pat. No. 4,051,056, pulp powder, glass beads, etc. can also be used. .

In the present invention, as a neutral liquid cleanser, various organic acids and alkalis may be used as pH control agents if necessary.

Also known are various additives, in particular various zeolites, EDTA-soda salts, NTAl as alternative builders for phosphates.
Sodium citrate, sodium malate, sodium polyafrylate, sodium gluconate, silica, monovinyl alcohol maleate copolymer, monoethylene maleic anhydride copolymer, sodium polymaleate, and the like can be used. In addition to this, various colorants may be used to improve the appearance of the product, and various fragrances, deodorizers, anti-staining agents, etc. may be used to improve the appearance of the product. Another feature of the present invention is the use of special equipment and One of the advantages of productivity is that the product can be manufactured by a simple stirring operation without requiring thermal energy for heating and melting.

Furthermore, it hardly freezes in winter at temperatures above -10°C, making it easier to use in cold weather than conventional products of this type.

Examples will be described below (numbers are in parts by weight).

Example 1 Ammonium chloride (2) and urea (6) are dissolved in water (20).

Then, EDTA-2Na (0.2) was added and LAS-Na
(25%) aqueous solution (16) Anneal fatty acid diethanolamide (2) was added to obtain a viscous aqueous solution.

Add chlorine silicate abrasive 1 (50) and appropriate amounts of pigments and fragrances, adjust the pH to around 7, adjust the pH to (100) with water, mix well, and check the viscosity (Tokyo Keiki B type viscometer 30 meter at 20℃). A liquid cleanser of 1600 cps (60 ppm) was obtained. The thus obtained liquid cleanser 1 was trial-produced in parallel with a liquid cleanser 1 having the following composition, and its stability was observed. The results were as follows. (The rest of the composition is the same as above) [Formulation] Example 2 Dissolve urea (9) ammonium chloride (3) in water (15) and prepare LAS-Na (25%) aqueous solution (26) oil fatty acid diethanolamide (3). .25) Imidazolinium betaine amphoteric activator (0.25) EDTA-2Na (0.25)
5) Zeolite type A (3) silicate-based abrasive (48) were mixed in order to obtain a highly viscous liquid slurry.

Add appropriate amounts of a pH control agent, fragrance (tsuka oil), and blue colorant (edible) to this mixture and make it 100% with water to obtain a liquid cleanser product.

This product was compared with those of Comparative Example 1 and Comparative Example 2 in detergency.

The results are as follows: [Cleaning power] 10 parts by weight of soybean oil (edible), 10 parts by weight of rapeseed oil (edible), 10 parts by weight of beef tallow (head), and 0.5 f of Sudan, heated well and combed to remove dirt.

This was applied almost uniformly onto each plate having a diameter of 10 cTn in an amount of 1.5 y.

On the other hand, I sampled liquid cleansers of 207 and 40V and checked the number of dishes washed.

[Composition]

Liquid cleanser of Comparative Example 1 Example 3 Ammonium chloride (2) Urea (6) is dissolved in water (18) and then EDTA-2Na (0.5) Zeolite-A
Type (3) LAS-Na (25%) aqueous solution (24) Anneal fatty acid monoethanolamide (2 mole ethylene oxide adduct) (3) Pure silica (99% or more SiC2) (
45) Citric acid (a small amount) Fluorescent brightener (3% aqueous solution of Cibbal CBSX manufactured by Ciba-Geigi Co., Ltd.) (0.313) Titanium white (0.5) was added one after another, made up to 100 with water, and stirred thoroughly. Strain it through a 100 mesh nylon cloth to get a liquid cream type cleanser.

(PH: 6.5 viscosity (approximately 1800 CPS at 20°C, 60 rpm, 7f63 rotor)) This liquid has a slightly high viscosity and is convenient for removing dirt such as inorganic mud from athletic shoes.

As for stability, no sign of separation was observed even after being left at room temperature for 3 months. Also, I hardly noticed any roughness on the skin of my hands, which is the case with commercially available athletic shoes made mainly from LAS. Example
4. We made a prototype of a liquid cleanser with the following formulation table and observed its stability (in both cases, the pH was controlled to 6.5-7.0) [Formulation] [Results] The product of the present invention was tested at 20℃ After being left for more than 3 months, 1 did not separate at all and the trial production was discarded.-8: Separation started after 1 month.Prototype waterfall-10: Separation started after 1 to 15 months.Prototype waterfall-9J1 showed signs of separation immediately.As a result, sodium chloride It is clear how the state of separation is controlled by the ratio of the inorganic neutral salt and surfactant.

Claims (1)

[Claims] 1. In a liquid cleanser composition prepared by blending 4 to 10% by weight of a surfactant, 2 to 15% by weight of a stabilizer, 20 to 70% by weight of a water-insoluble abrasive substance, and optionally a builder, the composition is dispersed in water. The former 1 uses linear alkylbenzene sulfonate and fatty acid alkanolamide as agents.
A liquid containing 0.3 to 3.5 parts by weight of the latter and 2 to 4 parts by weight of ammonium chloride and urea as stabilizers to 1 part by weight of the former. Cleanser composition.