Drug – bio-affecting and body treating compositions – Solid synthetic organic polymer as designated organic active... – Polymer from ethylenic monomers only
Patent
1987-10-13
1989-08-22
Robinson, Ellis P.
Drug, bio-affecting and body treating compositions
Solid synthetic organic polymer as designated organic active...
Polymer from ethylenic monomers only
132204, 132209, 424 72, A61K 709, A45D 704
Patent
active
048594598
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
The present invention is directed to the use of dipropylene glycol monomethyl ether as a swelling and penetrating material in hair shaping compositions.
In order to permanently shape human hair, the hair is first treated with a hair shaping composition which softens the hair keratin. Alkali hydroxide or reductively acting sulfur compounds, which belong either to the group of sulfites or hydrogen sulfites or to the group of mercaptocarboxylic acids, are generally used for this purpose. These substances are capable of softening the keratin of human hair with respect to its structure and enable a shaping of the hair.
After softening the hair keratin, the hair is rinsed with water and, in the case of a shaping treatment with reductively acting shaping compositions, fixed by means of treating it with a shaping composition based on an oxidizing active ingredient, preferably bromate or hydrogen peroxide. The previously broken disulfide bridge compounds of the hair keratin are reconnected in the new shape given to the hair. The hair is then rinsed with water.
However, the process for permanently shaping hair, described above, has considerable disadvantages. Thus, it is often necessary to use the aforementioned keratin softening active ingredients in relatively high concentrations in order to achieve a sufficient shaping of the hair. In addition, certain keratin softening active ingredients in hair shaping compositions which are adjusted to a pH value of approximately 6, such as sulfites and monothioglycolic acid esters, are only effective to a sufficient degree when temperatures of more than 60 degrees Celsius are applied simultaneously.
The physiological compatibility of the hair shaping compositions employed, however, are considerably impaired by increasing the temperature and concentration of active ingredients. This may result in skin irritations, burn symptoms and, when allowed to act for longer periods, even causticizations of the scalp.
Therefore, one has constantly sought for ways of achieving the greatest possible effectiveness in compositions for the permanent shaping of hair with simultaneous favorable physiological compatibility by means of a corresponding composition and manner of application. As concerns the physiological compatibility, attempts have been made, with reference to the compositions of preparations, to achieve smaller concentrations of active ingredients and to adjust the pH values so as to correspond to the natural pH of the skin and hair. At the same time, with respect to its application, efforts are being made to shorten the time periods during which the compositions are allowed to act and to work at room temperature.
Nevertheless, in order to achieve high effectiveness in such preparations with good physiological compatibility at the same time, certain auxiliary materials, known as swelling and penetrating materials, are often added to these preparations. These substances are capable of helping the active ingredients to penetrate the scleroprotein of the hair and, accordingly, increasing the effectiveness of the preparations in which they are contained.
For example, a good shaping of the hair can be achieved with the use of alkaline preparations by means of the addition of these compounds, even if the shaping compositions contain only a comparatively low concentration of keratin softening active ingredient.
However, the swelling and penetrating materials previously used in compositions for permanently shaping the hair have various disadvantages, so that the results which are achieved are not always satisfactory. Thus, these materials either have poor solubility in water, melamine, for example, or are physiologically incompatible, which is true of formamide, for example. Other materials of this type, such as alkali thiocyanates or ammonium thiocyanates, are decomposed by subsequent oxidizing treatment accompanied by the formation of unwanted by-products, or they are relatively easily saponifiable, as is the case in urea, for example. Alcohols such as isopropanol reduce th
REFERENCES:
patent: 3654936 (1972-04-01), Wajaroff
patent: 4177260 (1979-12-01), Wajaroff
patent: 4218435 (1980-08-01), Shiba
patent: 4424820 (1984-01-01), Cannell et al.
Chemical Abstracts, vol. 97, 7/1982 (No. 188644t).
Greiche Joussef
Hartmann Peter
Kohler Joachim
Robinson Ellis P.
Rucker Susan S.
Striker Michael J.
Wella Aktiengesellschaft
LandOfFree
Method of shaping human hair using dipropylene glycol monomethyl does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of shaping human hair using dipropylene glycol monomethyl, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of shaping human hair using dipropylene glycol monomethyl will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2416910