DE1492260B - Shaving aid to prepare for an electric shave - Google Patents

Description

3 4

Solubility of the ester in the particular used The amount of to achieve a suitable, reduced

Water-alcohol system, due to the required buildable foam, the surfactant is not required

Lubricity of the finished shaving aid is critical and depends on a given surfactant

medium corresponding concentration and the delivery- the ratio of water to alcohol in the

tion according to compatibility with a stable foam, according to the amount and type of lubricant and

limited. Among the connections that are either at a lesser extent according to the pressure under which

The shaving aid according to the invention is used alone or in conjunction with others. at

Lubricants found to be suitable may include use of less suitable surfactants

Esters of tartaric acid, succinic acid and the addition of more emulsifiers to achieve this

Phthalic acid, e.g. B. Di- (isobutyl) adipate, di- (n-propyl) - io a perfect foam are necessary,

adipate, di (isopropyl) adipate, di (methoxypolyäthy- surfactant additives of more than 5 percent by weight are

Lenglycol) adipate (molecular weight 350), dimethyl, however, should be avoided as this reduces the lubricating effect

sebacate, 2,2,4-trimethyl-1,3-pentanediol-diisobutyrate, the shaving aid according to the invention.

Di- (methoxyätboxyäthanol) -adipat, Di- (methoxyätha- tigt and the razor can become blocked.

nol) adipate, di (butoxyethanol) phthalate, diethyl tar 15 surfactant additives between 0.5 and 5 percent by weight

entered, di- (isobutyl) -tartrate, di- (methoxyethanol) -phtha- represent the extreme concentration limits.

lat, propylene carbonate, triethylene glycol-di- (2-ethylbut) an addition of surfactants between 1.5 and

tyrate) and diethyl succinate. 3 percent by weight.

Esters of dibasic acids with low Aiko- As surfactant, for example, a polyethylene can have, similar to isopropyl myristate, both glycol ether complex of alcohols with higher dry lubricity and a good soluble molecular weight, especially with 16 to 18 carbon atoms in water-alcohol systems. Esters with higher material atoms can be used. A mixture of alcohols, on the other hand, is to a greater extent oleogenic reaction products of higher fatty alcohols and ethylene, and so insoluble in the presence of water that lenoxide also shows favorable properties. Next Also suspended in a 80 ° / ₀ alcohol-water mixture can only 25 toward a nichtiopisch.es waxy Emulgierschwer to be brought into solution. The compatibility medium based on ethers of higher fatty alcohols and esters can be used with the formation of a stable foam, the following composition obviously changes according to the water-soluble:
speed of alcohol used, for any given dibasic acid. The larger the molecule of the 30 polyethylene glycol stearyl ether

dibasic acid, the less compatible it is (20 ethoxy groups) 30.0%

its esters compared to homologous esters with nied- cetyl alcohol ...... 35.0 ° / ₀

lower molecular weight. Regarding the foamed stearyl alcohol · ..... ■ 35.0% / ₀

Adipates, sebacates and iso-acids are constant

Propyl adipate is preferable to isobutyl adipate. 35 Polyethylene glycol ethers of higher alcohol

The esters with the best lubricity can ^pick ( ⁵ > ⁵ ethoxy groups). 60.0%

be mixed with the more compatible esters, where- ■ cetyl alcohol ......... 40.0% / ₀

through a favorable balance between lubricity- '

speed and foam compatibility is achieved. In addition, the use of a surfactant is particularly

use of certain water-compatible adipates can be cheaper, which is made from a mixture of polyethylene

up to 1.5 ° / ₀ isopropyl be added, glycol ethers of long chain alcohols from itself

with an excellent lubricating effect no ver Lanolin derive, with higher alcohols with 16 to

deterioration of the foam quality occurs. Consists of 22 carbon atoms.

The type of diester used in each case is determined as a propellant for the shaving aid according to the

the amount in which he uses the shaving aid according to the invention to produce a homogeneous, degradable

Invention is added. The minimum quantity results in capable foam, chlorine-fluorine-carbon

from the lubricating effect to be achieved, the maximum hydrogen, z. B. Difluorchlonnethan, Fluorotrichlor-

economic point of view- methane, difluorodichloromethane, tetrafluorodichloroethane,

th, due to the formation of completely oily compounds difluoroethane, difluorochloroethane and with 2 to 16 fluorine

compositions or by the amount of ethane and isobutane substituted with respect to the 50 or chlorine atoms

Solubility and compatibility the foam resistant or their mixtures in different proportions,

Speed or the homogeneity of the composition gases, such as difluoroethane, are associated with the shaving aid

agrees, determined. In the practical context of the invention, they are particularly compatible. A driving

Use expected lowest temperatures average amount of 2 to about 15 percent by weight

to consider. The lower limit is around 55 foaming. However, it is particularly cheap to have a

2 percent by weight. The maximum ester concentration to use gas amount of 7 to 12 percent by weight,

when using di- (methoxyethoxyethanol) - for compatibility at low temperatures and

adipat is about 13 percent by weight. However, the container should be emptied as completely as possible

higher ester concentrations are also possible. Particularly achievable.

A lubricant concentration between 60 is favorable. To produce a usable foam

4 and 10 percent by weight. Propellant mixtures with vapor pressures between

The 0.35 and 1.05 atmospheres at 21 ° C. can be used for the shaving aid according to the invention. To the generation Usable alcohols are ethyl and isopropyl alcohol, a decomposable foam that is as stable as possible get. The mixture of 21 used according to the invention, however, is preferable to pressures of 1.05 atmospheres and more. There up to 34 percent by weight of water and 46 to 64 percent by weight of the propellants used have a relatively large percent solubility Alcohol ensures a homogeneous mix in alcohol and in mixtures of these a considerable amount of alcohol is required even with the low species to be expected in practice, harshest temperatures. causes the solvent to lower the

Propellant vapor pressure to lower values than those of the pure propellant mixtures. Thus for example dichlorodifluoromethane at 23 ⁰ C a pressure of 5.4 atm, while the pressure of 10 grams of the blowing agent in 90 grams is a concentrate with ° / ₀ ethanol at the same temperature for 3.9 atm.

In the following the invention is illustrated by means of examples described in more detail. The figures given are percentages by weight, calculated on the total weight of the shaving aid according to the invention.

Example 1 The following mixture is made:

Di (methoxyethoxyethanol) adipate 2.40

Denatured ethyl alcohol (95 ° / ₀ ) 68.10

Mixture of reaction products of higher fatty alcohols and ethylene oxide 4.90

Water 21.90

Isobutane 2.70

The composition is an example of its use a low propellant concentration and a hydrocarbon propellant. The result is satisfactory.

Example 2

In the following composition it is rated with good Result of a mixture of lubricants used:

Di (methoxyethoxyethanol) adipate 2.70

Di (isopropyl) adipate 2.70

Denatured ethyl alcohol (95%) 54.30

Water 28.05

Cetyl and stearyl alcohols 1.90

Polyethylene glycol (20 mol.) Stearyl ether .. 0.85 difluorodichloromethane 9.50

Example 3

Myristic acid esters are not per se suitable for use in a degradable foam. It is however, it has been found that lubricant blends contain these esters together with certain diesters contain, have a good foam stability and used approximately in accordance with the following mixture can be:

Di (methoxyethoxyethanol) adipate 4.50

Denatured ethyl alcohol (95 ° / ₀ ) ... 57.00

Mixture of reaction products of higher fatty alcohols and ethylene oxide 3.60

Isopropyl myristate ... 0.90

Water 24.50

Difluorodichloromethane 9.50

. At. s ρ i e 1 4

In the following mixture which has been found to be satisfactory, the lubricant is a Monobasic acid ester:

Triethylene glycol di- (2-ethyl butyrate) ...... 3.60

Denatured ethyl alcohol (95 ° / ₀ ) ... · .... 52.95

Mixture of reaction products of higher fatty alcohols and ethylene oxide 2.75

Water ..31.20

Difluoroethane 9.50

Example 5

The following composition contains propylene carbonate as a die'sterr lubricant:

Propylene carbonate 3.60

Denatured ethyl alcohol (95 ° / ₀ ) ... 52.50

Mixture of reaction products of higher fatty alcohols and ethylene oxide 2.75

Water 31.65

Difluorodichloromethane 9.50

Example

In some cases it is desirable to produce a low vapor pressure mixture which is in unprotected Glass bottles can be used. An example of this is the following mixture:

Di (isopropyl) adipate 3.05

Denatured ethyl alcohol (95 ° / ₀₎ 44.75

Polyethylene glycol (200 moles) 8.70

Polyethylene glycol ether of higher fatty alcohols (5.5 ethoxy groups) cetyl

stearyl ether 1.85

Cetyl alcohol 1.20

Polyvinyl pyrollidone vinyl alcohol

Copolymer 0.43

Water, 27.30

Fluorotrichloromethane 4.35

Difluorochloroethane 8.65

The main advantages of this composition are that they can also be used at particularly low temperatures remains clear and does not decompose.

The invention is not limited to these examples. Changes to the individual components themselves and their proportions fall within the scope of the invention. Other common ones can also be used Additives are added, e.g. B. fragrances, antiseptics, dyes, ultraviolet absorbers and the like. Others Hydrocarbons or halogenated hydrocarbons can be used in place of the propellants mentioned or to be used together with them. Furthermore, the relative proportions of the individual components of the mixtures can be changed within the specified limits. For example, if at Using a high concentration of lubricant the foam tends to rupture, due to an or several of the following actions need to be corrected:

Use a more compatible lubricant, change the mixing ratio of Water and alcohol, increasing the proportion of surface former or increasing the pressure.

Claims (3)

1 2 capable foam. According to patent claims, the foam is relatively stable after application and remains in the areas to which it was applied. At a 1. Shaving aid to prepare for electrical contact, however, the foam quickly breaks to a shave, which means that 5 thin liquid together. A degradable it consists of a liquefied, halogenated carbon foam formulation of the hydrogens or saturated hydrocarbons type described above is generally composed of about 55 to 70 ° / ₀ of a 3 to 4 carbon atoms as a blowing agent in water-alcohol solution of the active ingredient together with a Pressure vessel enclosed, in the form of 0.5 to 5.0 percent by weight of a surfactant, which should only be soluble in a stable foam of high lubricity io one of the miscible solvents, a mixture of 21 to 34 percent by weight and 3 to 15 percent by weight of a mixture that can be applied liquefied, gas percent water and 46 to 64 percent by weight propellant, which is compatible with the other constituent alcohol with 0.5 to 5 percent by weight of a ten parts of the concentrate. If a small sids and about 2 to 13 weight percent of a di- amount of a triglyceride vegetable oil or a typiesters of dibasic acids with 3 to 10 carbo-15 see light ester, z. B. Isopropyl myristate, introduced into a lenstoffatomen and alcohols with 1 to 4 carbons such a composition, then material atoms or propylene carbonate or a di- no foam is generated when they are applied. In addition, esters from monobasic acids with 2 to 8 carbons - the aerosol obtained does not have sufficient material atoms and di- or polyalcohols with 3 to lubricating properties. Wild to achieve a size of -8 carbon atoms as a lubricant, 20 ren lubricity a large amount of these esters with the propellant added in an amount of 2 to the concentrate, then become inhomogeneous 15 percent by weight is present. Get three-phase systems that lead to foam formation 2. Shaving aid according to claim 1, characterized thereby not capable and when applied to the hand characterized in that as a surfactant, a mixture run through the fingers. made of polyethylene glycol esters and ethers of higher 25 The invention is based on a shaving aid for Acids and alcohols with 12 to 22 carbon preparation of the electric shave, which contains atoms. disadvantageous properties of the described above 3. Shaving aid according to claim 1 and 2, avoids known shaving aid. characterized in that it is a mi-The shaving aid according to the invention is characterized in that it is a surfactant Schung from polyethylene glycol esters and ethers 30 characterized in that it consists of a liquefied, of higher acids and alcohols with 12 to halogenated hydrocarbons or saturated 22 carbon atoms with higher alcohols with hydrocarbons with 3 to 4 carbon atoms Contains 16 to 22 carbon atoms. enclosed as propellant in a pressure vessel, in the form of a stable foam of a mixture of 21 to 34 percent by weight that can be applied with a high degree of lubricity Water and 46 to 64 percent by weight Alcohol with 0.5 to 5 percent by weight of a surfactant and about 2 to 13 weight percent of a diester dibasic acids with 3 to 10 carbon atoms 40 and alcohols with 1 to 4 carbon atoms or Propylene carbonate or a diester of monobasic The invention relates to a shaving aid for pre-acids with 2 to 8 carbon atoms and di- or preparation of the electric shave. Polyalcohols with 3 to 8 carbon atoms as The known shaving aid for preparing lubricants consists of the propellant being present in one of the electric shaves, generally as a »pre-shave 45 amount of 2 to 15 percent by weight,
lotions «, consist generally of The shaving aid according to the invention shows a Solutions of light esters, e.g. B. Isopropyl myristate, excellent lubricity and forms at the same time or light liquid vegetable oils in essentially a stable, degradable foam when applied, anhydrous, clear alcoholic solutions. In view of the oily, lipophilic nature of the in-j In contrast to mineral oils, oils are characterized by the formation of a stable foam j Surprisingly because of their dry lubricity and their insolubility. j in water-alcohol systems. They are suitable. An advantageous embodiment of the shaving aid may be used as a lubricant, but have the aftermath according to the invention is characterized by part that the alcohol solutions produced from them that it is a mixture of polyethylene glycol as a surfactant the application from the bottle to the hand 55 esters and ethers of higher acids and alcohols easily run through your fingers so that such liquid contains 12 to 22 carbon atoms. Using are not economical in use. When using these surfactants, a particularly suitable coating is created thicker solutions, on the other hand, produce buildable foam. the razors vei stuffs. As a result, a shaving aid is particularly advantageous Solutions do not have their intended purpose, which is contained therein according to the invention, which is a Mi as a surfactant, to make the skin dry and lubricious Schung from polyethylene glycol esters and ethers of and to lubricate the razor so that it can be used with higher acids and alcohols with 12 to 22 carbon | Can run as high a speed as possible and so atoms with higher alcohols with 16 to 22 Koh- f with an easy shave. contains carbon atoms. These surfactants ensure | Also, one method of convenient construction is the formation of a degradable foam without the | wear the desired amount of a thin, lubricating effect of the shaving aid Alcohol-containing solution known. This is what will happen. | the product to be applied in the form of a degradable The selection of the lubricant is only determined by the j