JPS6341586A - Aerosol composition - Google Patents

Abstract

PURPOSE:To provide the titled composition outstanding in stability and propelling characteristics, for use in rinsing, shaving, etc., comprising a salt of higher fatty acid and specific basic substance, water and propellant, with said propellant homogeneously solubilized. CONSTITUTION:The objective composition comprising (A) a salt from (i) a higher fatty acid (pref. 8-20C branched one) and (ii) a basic substance of formula (X is H or OH) (e.g. 2-amino-2-methyl 1,3-propanediol, 2-amino-2-methyl-1- propanol), (B) water, and (C) a propellant (e.g. dichlorodifluoromethane).

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to aerosol compositions.

More specifically, the stability achieved by uniformly solubilizing the propellant;
The present invention relates to an aerosol composition with excellent jetting properties.

[Conventional technology]

Conventionally, potassium salts, triethanolamine salts, and the like of higher fatty acids have been mainly used as foaming cleaning agents for aerosol compositions for cleaning and shaving.

However, aerosol compositions prepared using these salts have poor compatibility with propellants, and are separated into three-phase systems, namely, a concentrate phase (for cleaning agent before filling into an aerosol container) phase, and a liquefied gas phase (the above two phases). The propellant may form a three-phase state (forming a liquid phase) and a gas phase; Not completely dissolved in undiluted solution. As a result, the sprayability at low temperatures and the amount of residue left when using the spray
When the concentration is below 0%, the jetting performance deteriorates significantly and bubbles form?
- As expected, phenomena such as water flowing out of the injection port can be seen. Also, the phase between the propellant and the concentrate? If g t'l is incomplete, the quality of foam produced at the beginning of use and the quality of foam produced at the end of use will be significantly different. At the end of use, it becomes a sticky foam with too much No. 31 stock solution. This is clear from the measurement of specific gravity, which shows a higher specific gravity than the initial value, which is truly undesirable in terms of the feeling of use.

[Problem that the invention seeks to solve]

In order to improve the compatibility between the stock solution and the propellant, conventional methods have been taken such as adding nonionic surfactants to create an emulsified state and improve the compatibility, but it is not stable over a wide temperature range. This is not preferable because the propellant is not used properly and the propellant is lost.

[Means for solving problems]

As a result of intensive research in order to eliminate the drawbacks mentioned above, the present inventor has found that these drawbacks can be overcome by blending higher fatty acids and specific basic substances with water and a propellant. This discovery led to the completion of the present invention.

The present invention is an aerosol composition characterized by containing a salt of a higher fatty acid and a basic substance represented by formula (1), water, and a propellant.

General formula (I): I12 " To provide an aerosol composition that does not separate, has almost no change in foam quality between the initial stage and the final stage of use, and has extremely good sprayability at low temperatures.

The present invention will be explained in detail below.

High grade fat used in the present invention N/j acid mouth carbon number F (~20
, preferably 12 to 18 Hh acids, which may be saturated, saturated, linear or branched. One or both of these higher fatty acids are widely used.

The blending amount is 1% to 30% of the stock solution, and the amount is 3%.
~25% of market weight. If it is less than 1% by weight, it is difficult to uniformly solubilize the propellant, and if it is added in excess of 30% by weight, the viscosity of the stock solution will rise to -0. It is not preferred as an aerosol stock solution because it tends to cause solidification in ingredients.

In the present invention, the compound of general formula (1) used is 2-amino-2-methyl-1,3-di-1-panediol or 2-amino-2-methyl-1-propanediol; Any species or two or more species may be selected and used.

The blending amount is 1/4 to 1/2, preferably 1/3 to 1/2 in weight ratio to the higher fatty acid. When the amount is less than 1/4, the propellant is evenly solubilized, and even when more than 1/2 is added, no difference in effectiveness is observed.

11] Primary fatty acids and -formation The basic substances shown in (1) may be added in the form of salts, or may be added separately to form salts during the preparation of the stock solution or coazole composition.

The amount of water in the present invention is 30 to 95 m% of the total amount of the stock solution.

60 to 99 parts by weight, preferably 2 to 30 parts by weight, of a stock solution containing the above-mentioned essential components is contained in an aerosol container together with 1 to 40 parts by weight, preferably 2 to 30 parts by weight (total 100 parts by weight) of a propellant. Fill inside.

The propellant is dichlorodifluoromethane, Tric I~
Examples include chlorofluorocarbon gases such as 10 monofluoromethane and dichlorodifluoroethane, liquefied petroleum gases (hereinafter referred to as LPG) such as propane, butane and isobutane, and dimethyl ether. These propellants can be used in China, Germany, or in combination of two or more.

If the amount of propellant is less than 1% by weight of the total amount of the aerosol composition, it is difficult to obtain good jetting performance, and if it exceeds 40% by weight, uniform solubilization is difficult and separation of the propellant is observed.

The composition of the present invention is transparent over a wide temperature range! (・It is stable without causing separation of one agent, but if stability in a wider temperature range is desired, in addition to the essential components listed in -I-, a nonionic surfactant may be added. is preferred.

Desirable nonionic surface ascending activity is III, B is 12-16
An example of this is polyoxyethylene (hereinafter referred to as
P Or', I/U) Cured Castor Derivative (R040
~120 mol), POE ~2-octyl 1 decanol,
POE devidrocholesterol is mentioned as a particularly preferred nonionic surfactant.

The blending amount is 0.3 to 5% by weight based on the total amount of the stock solution.

The composition of the present invention may further contain moisturizing agents, lower alcohols, detergents, oils, preservatives, antioxidants, drugs,
Components commonly used in aerosol compositions such as thickeners, pigments, and fragrances can also be added.

[Invention of glue) Song Dynasty]

Next, the present invention will be explained in more detail with reference to a+ (experimental examples).

In addition, each IJ measurement device and the evaluation method below L were used.

(Propellant 0 ■ V 100 state) Good<11. After the test, it was placed on the 11th mark and observed.

Items in which the propellant is completely transparent and solubilized ○ Items in which the propellant is mixed with liquid on top of the propellant △ Items in which the propellant is molecule 4 + 1 × (internal pressure - residual amount test) The internal pressure of each remaining amount was measured at a temperature of 25° C. using a pull-in tube.

(Gravity Specific Gravity) Bubbles were uniformly sprayed into a glass container with a volume of 11 ft IOc++1 and measured.

The results are shown in Table-1 and Figure-I. Figure-1 shows test example 1.
FIG. 2 is a diagram showing the internal pressure and specific gravity corresponding to the remaining amount when No. 2 is injected and used.

〇-〇 Test Example 1 Internal Pressure Low ------- Mouth Test Example 1 Gravity・-□・ Test Example 2 Internal Pressure■---Test Example 2 Gravity Specific Gravity Table-1 Myristic Acid 1010 Triethanolamine -5 Precise Water Residual Residual Propellant Solubilization ○ △～× Foam Specific Gravity
Small change Change in internal pressure change Small change
Variant Test Example 1 had a good propellant solubilization state and was uniformly transparent over a wide temperature range. In Test Example 2, the propellant was apparently mixed with the stock solution, and gas separation was observed at low temperatures (5° C.).

In addition, in Test Example 1, there was little change in the internal pressure and the remaining amount of gravity, and the foam quality at the beginning of use remained unchanged until the end, whereas in Test Example 2, there was a large change, and the foam quality remained unchanged until the end. At the final stage, a marked difference in foam quality was observed.

〔Example〕

Hereinafter, the present invention will be explained in further detail with reference to Examples. The present invention is not limited thereby.

Example-1 The facial cleansing aerosol composition shown below was prepared.

Laminated wood 53.8% by weight Glycerin 3 Dipropylene glycol 3 Myristic acid 6 Lauric acid 14 Lauric acid diethanolamide 3 2-Amino-2-methyl-1°3-propanediol 7 Fragrance 0.2 Tetrafluorodichloroethane L P C, Mixed Gas (7/3) In The above composition uniformly solubilized the propellant, showed little change in foam quality until the end of use, and had extremely good spray conditions at low temperatures.

Example-2 A cleaning aerosol composition shown below was prepared.

Purified water 52% by weight 1.3-Butylene glycol 5 Isostearic acid IO Myristic acid 5 Oleic acid 102-amino-2
-Methyl=1-propatol 10 Dichlorotetrafluoroethane 3 Dichlorodifluoromethane 3 1, PC2 The above silk composition uniformly solubilized the propellant and was good with little change in foam quality until the end of use.

Example-3 The following aerosol composition for cleaning was prepared.

Purified water 62% by weight Glycerin 10 Sorbitol 5 Myristic acid 5 Lauric acid 3 Coconut fatty acid diethanolamide 5 2-Amino-2-methyl-propanediol 2.5 1.Reethanolamine 1 Allantoin 0.1 Vitamin E acetate 0. 2 fragrance
0.2 POE hydrogenated castor oil derivative (E 060 mol) 1 L PG 5 The above composition has good foaming properties, is easy to sting, is good as a whole body cleansing material, and the foam quality does not change until the end of use. It was good with few.

Example-4 The following shaving aerosol composition was prepared.

Purified water 61.098% market weight Dipropylene glycol 10 Stearic acid 5 Myristic acid 2 2-amino-2-methyl=1-propatol 3.5 POE-2-ophtyldodecanol (E O20 mol) 1 Pigment 0 .00
2 Perfume 0.3 Monoammonium glycyrrhizinate 0.1 Difluorodichloromethane 12 The above composition uniformly solubilized gas, showed little change in foam quality until the end of use, and had good usability.

Example 5 The following aerosol composition for both shaving and face washing was prepared.

Purified water 66.8% by weight Glycerin 10 Stearic acid 2 Myristic acid 3 Lauric acid 4 Sodium N-cocoylglutamate 1 Jetanolamide laurate 4 2-Amino-2-methyl-1°3-propanediol 3 Chlorhexidine gluconate 0. 2 L PG 4 Dimethyl ether 2 The above-mentioned product uniformly solubilized the propellant, showed little change in foam quality until the end of use, and was good as an aerosol for both shaving and face washing.

Example-6 The following shaving aerosol composition was prepared.

Purified water 76゜3 Weight % Glycerin 5 Dipropylene glycol 5 Stearic acid 2-amino-22 Monomethyl-1-propatur salt 4 Myristic acid 2-amino-2 Monomethyl-1-propatur salt 4 Swawalan 0.2 Coconut fatty acid diethanol Amide 2 Aloe extract 0.1 Menthol 0.2 Fragrance 0.2■,
PG 5'' composition uniformly solubilized the propellant, and there was little change in foam quality until the end of use (it was good).

[Brief explanation of drawings]

Figure-1 shows the aerosol composition according to the present invention (Test Example 1)
2 is a drawing showing the relationship between the residue, internal pressure, and foam specific gravity of an aerosol composition for comparison (Test Example 2). 〇－〇 Test example 1 Internal pressure Low---1---Ro Test example 1 Foam specific gravity・□・Test example 2 Internal pressure

Claims (5)

[Claims] (1) An aerosol composition characterized by containing a salt of a higher fatty acid and a basic substance represented by the general formula (I), water, and a propellant. General formula (I): ▲There are mathematical formulas, chemical formulas, tables, etc.▼ (X represents hydrogen or hydroxyl group.) (2) The aerosol composition according to claim 1, wherein the higher fatty acid is a linear saturated higher fatty acid having 8 to 20 carbon atoms. (3) The aerosol composition according to claim 1, wherein the higher fatty acid is a branched higher fatty acid having 8 to 20 carbon atoms. (4) The aerosol composition according to claim 1, wherein the higher fatty acid is an unsaturated higher fatty acid having 8 to 20 carbon atoms. (5) An aerosol composition obtained by further blending a nonionic surfactant with the aerosol composition according to any one of claims 1 to 3.