US2009394A - - Google Patents
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- Publication number
- US2009394A US2009394A US2009394DA US2009394A US 2009394 A US2009394 A US 2009394A US 2009394D A US2009394D A US 2009394DA US 2009394 A US2009394 A US 2009394A
- Authority
- US
- United States
- Prior art keywords
- skin
- depilatory
- protective
- depilatories
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 210000003491 Skin Anatomy 0.000 description 40
- 230000002951 depilatory Effects 0.000 description 34
- 239000000126 substance Substances 0.000 description 28
- 239000010410 layer Substances 0.000 description 18
- 230000001681 protective Effects 0.000 description 14
- 210000004209 Hair Anatomy 0.000 description 10
- 102000011782 Keratins Human genes 0.000 description 10
- 108010076876 Keratins Proteins 0.000 description 10
- 239000000839 emulsion Substances 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 6
- 239000003925 fat Substances 0.000 description 6
- 230000001530 keratinolytic Effects 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000003513 alkali Substances 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- 239000000084 colloidal system Substances 0.000 description 4
- 238000010494 dissociation reaction Methods 0.000 description 4
- 230000005593 dissociations Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000011241 protective layer Substances 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 102100001249 ALB Human genes 0.000 description 2
- 101710027066 ALB Proteins 0.000 description 2
- RGCKGOZRHPZPFP-UHFFFAOYSA-N Alizarin Chemical compound C1=CC=C2C(=O)C3=C(O)C(O)=CC=C3C(=O)C2=C1 RGCKGOZRHPZPFP-UHFFFAOYSA-N 0.000 description 2
- 210000000981 Epithelium Anatomy 0.000 description 2
- 108010010803 Gelatin Proteins 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- 229940050528 albumin Drugs 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000001627 detrimental Effects 0.000 description 2
- 230000003292 diminished Effects 0.000 description 2
- 230000001804 emulsifying Effects 0.000 description 2
- 235000019197 fats Nutrition 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 235000013312 flour Nutrition 0.000 description 2
- 229920000159 gelatin Polymers 0.000 description 2
- 239000008273 gelatin Substances 0.000 description 2
- 235000019322 gelatine Nutrition 0.000 description 2
- 235000011852 gelatine desserts Nutrition 0.000 description 2
- 230000003301 hydrolyzing Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 230000003472 neutralizing Effects 0.000 description 2
- 235000019198 oils Nutrition 0.000 description 2
- 235000014593 oils and fats Nutrition 0.000 description 2
- 238000009877 rendering Methods 0.000 description 2
- 238000007127 saponification reaction Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 239000006188 syrup Substances 0.000 description 2
- 235000020357 syrup Nutrition 0.000 description 2
- 150000003568 thioethers Chemical class 0.000 description 2
- 238000005429 turbidity Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
- A61K8/73—Polysaccharides
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/46—Ingredients of undetermined constitution or reaction products thereof, e.g. skin, bone, milk, cotton fibre, eggshell, oxgall or plant extracts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
- A61K8/04—Dispersions; Emulsions
- A61K8/042—Gels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
- A61K8/73—Polysaccharides
- A61K8/731—Cellulose; Quaternized cellulose derivatives
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/96—Cosmetics or similar toiletry preparations characterised by the composition containing materials, or derivatives thereof of undetermined constitution
- A61K8/97—Cosmetics or similar toiletry preparations characterised by the composition containing materials, or derivatives thereof of undetermined constitution from algae, fungi, lichens or plants; from derivatives thereof
- A61K8/9783—Angiosperms [Magnoliophyta]
- A61K8/9794—Liliopsida [monocotyledons]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/0012—Galenical forms characterised by the site of application
- A61K9/0014—Skin, i.e. galenical aspects of topical compositions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q9/00—Preparations for removing hair or for aiding hair removal
- A61Q9/04—Depilatories
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
- A61K2800/74—Biological properties of particular ingredients
- A61K2800/75—Anti-irritant
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
- A61K2800/80—Process related aspects concerning the preparation of the cosmetic composition or the storage or application thereof
- A61K2800/88—Two- or multipart kits
- A61K2800/884—Sequential application
Definitions
- My invention relates to depilatories and to the method of applying same.
- the substantially equal chemical constitution of the hair and the upper layer of the skin has not been taken into consideration.
- the composition of depilatories is either determined with a view to presenting the active substances in a pleasant form, for instance, by adding froth-generating agents, zinc oxide, sugar, kieselguhr, flour and the like, or with a view to neutralizing the free alkali which is formed by the hydrolytic dissociation of the normally present sulfides.
- the keratin of the skin is protected against keratolytic action by rendering the epiderm proof against the ac tion of the depilatory before applying the latter.
- Suitable substances caused to be absorbed by the skin form a protective layer on and in the superficial epithelium layer.
- protective substances such as albumin, gelatin, starch, fat, oil,
- the protective substances referred to become particularly active if applied in a suitably dispersed, preferably emulsified, condition in which they are not absorbed by the depilator but are precipitated or fiocculated in finest subdivision. This action is due to the fact that the protective substance is a colloid, while the depilatory is present in ionized condition.
- the protective colloidal substance is absorbed thoroughly by the porous upper layer of the skin,-
- My invention therefore comprises treating the skin before shaving with anemulsified substance which enters the skin and protects the skin against the action of the depilatory, while that part of the emulsion, which is not absorbed by the skin, in coming in contact with the ionized depilatory, is fiocculated or precipitated and thus allows the depilatory .to remove the hairs.
- the protective substance and the depilatory are enclosed ready for use in separate vessels surrounded by a suitable envelope.
- Colloids of the most various kinds which can be emulsified may be employed as protective substances.
- A. protective emulsion may for instance be prepared in' the following manner.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Epidemiology (AREA)
- Birds (AREA)
- Chemical & Material Sciences (AREA)
- Botany (AREA)
- Dermatology (AREA)
- Medicinal Chemistry (AREA)
- Pharmacology & Pharmacy (AREA)
- Mycology (AREA)
- Microbiology (AREA)
- Biotechnology (AREA)
- Engineering & Computer Science (AREA)
- Dispersion Chemistry (AREA)
- Cosmetics (AREA)
Description
i atented July 30, 1935 FFic' ihlans Werner Fiedler, Leipzig, Germany No Drawing Application May 18, 1931, Serial No. 533,269. lln Germany May 21, 1930 1 Claim.
My invention relates to depilatories and to the method of applying same.
It is an object of my invention to prevent irri tation or other undesirable action of the depilatory on the skin. To this end I protect the skin by a layer of a substance which is not attacked by the clepilator and apply the depilator on top of such protective layer.
Many depilatories have already been suggested, most of them being designed as substitutes for shaving. However all these depilatories are known to irritate the skin. This is due to the fact that the chemical constitution of the hair and of the upper layers of the skin are substan tially equal, consisting both of keratins and be-= ing coated superficially with an extremely thin layer of fat. If keratolytic reagents act on this layer it is saponified by the strong alkali present in all depilatories and the keratins of the skin and the hair are destroyed at the same time the skin being attacked and irritated.
In the compounding of the depilatories hitherto suggested the substantially equal chemical constitution of the hair and the upper layer of the skin has not been taken into consideration. The composition of depilatories is either determined with a view to presenting the active substances in a pleasant form, for instance, by adding froth-generating agents, zinc oxide, sugar, kieselguhr, flour and the like, or with a view to neutralizing the free alkali which is formed by the hydrolytic dissociation of the normally present sulfides. However, it has been found to be absolutely impracticable to destroy the keratin of the hair while leaving unaltered the keratin of the skin.
According to the present invention the keratin of the skin is protected against keratolytic action by rendering the epiderm proof against the ac tion of the depilatory before applying the latter.
Suitable substances caused to be absorbed by the skin form a protective layer on and in the superficial epithelium layer. In view of the fact that the saponification of the thin layer of fat on the skin proceeds rapidly, protective substances, such as albumin, gelatin, starch, fat, oil,
mineral substances, cellulose and the like, were as oils and fats, covering the skin, will combinewith the depilatories, whereby the dissociation of the keratolytic reagents is considerably suppressed and their action greatly diminished.
I have now found that the protective substances referred to become particularly active if applied in a suitably dispersed, preferably emulsified, condition in which they are not absorbed by the depilator but are precipitated or fiocculated in finest subdivision. This action is due to the fact that the protective substance is a colloid, while the depilatory is present in ionized condition. The protective colloidal substance is absorbed thoroughly by the porous upper layer of the skin,-
and forms an insulating layer which cannot be removed by the depilatory so that the skin is protected against the detrimental influence exerted by the depilatory.
My invention therefore comprises treating the skin before shaving with anemulsified substance which enters the skin and protects the skin against the action of the depilatory, while that part of the emulsion, which is not absorbed by the skin, in coming in contact with the ionized depilatory, is fiocculated or precipitated and thus allows the depilatory .to remove the hairs.
Preferably the protective substance and the depilatory are enclosed ready for use in separate vessels surrounded by a suitable envelope.
Colloids of the most various kinds which can be emulsified, may be employed as protective substances.
A. protective emulsion may for instance be prepared in' the following manner.
10 parts finely ground mechanical wood pulp, are suspended in 300 parts water to which 36 parts caustic soda solution (specific weight 1.091) are added. The liquid is heated under pressure to about 200 C. for several hours and continuously agitated until a complete solution has been obtained. This solution has a slightly brownish color and opalescent turbidity and is therefore filtered with charcoal or some other decolorizing agent. The clear and colorless filtrate is dialyzed until the alkaline reaction disappears, it is then thickened to the consistence of syrup and changed into an emulsion by means of an emulsifying .agent, such as Turkey-red oil or a mixture of the oil with other substances. This emulsion is first spread on the skin, whereupon any suitable depilatory may be applied in a well known manner without the skin being in any way affected by it.
Various changes may be made in the details disclosed in the foregoing specification without departing from the invention or sacrificing the
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2009394A true US2009394A (en) | 1935-07-30 |
Family
ID=3427248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US2009394D Expired - Lifetime US2009394A (en) |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2009394A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4402698A (en) * | 1979-12-13 | 1983-09-06 | L'oreal | Hair-dyeing process involving protection of the scalp |
-
0
- US US2009394D patent/US2009394A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4402698A (en) * | 1979-12-13 | 1983-09-06 | L'oreal | Hair-dyeing process involving protection of the scalp |
| US4545978A (en) * | 1979-12-13 | 1985-10-08 | L'oreal | Hair-dyeing process involving protection of the scalp |
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