Drug – bio-affecting and body treating compositions – Dentifrices
Patent
1991-08-09
1994-06-28
Rose, Shep K.
Drug, bio-affecting and body treating compositions
Dentifrices
141100, 222 94, A61K 716, B67C 302, B05B 700, B65D 3524
Patent
active
053245059
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to toothpastes in the form of a multicolored, striped strand and to a device for dispensing the strand from a container.
2. Statement of Related Art
In the field of personal hygiene and cosmetic products, ever increasing importance is being attributed not only to the corresponding ingredients, but also to an attractive presentation. Apart from pure aesthetics, which play an important part in regard to the choice of color, pack and, in many cases, the consistency of the product, there are also practical aspects to be taken into account in this regard. For example, the pleasure which children find in colors and shapes can be directed towards encouraging them to familiarize themselves, so to speak at play, with the necessities involved in cleanliness and personal hygiene. One way of encouraging children to brush their teeth regularly is to provide them with a colored, preferably multicolored, toothpaste distinguished by an attractive shape of the strand and optionally provided with an agreeable flavor.
Toothpastes with incorporated centers or stripes are known. Thus, DE-OS 19 37 001 describes toothpastes in which stripes or centers of a paste-like mass of high cleaning power are incorporated in a gel-like carrier strand. The opposite case, where transparent stripes are incorporated in a carrier strand of opaque toothpaste of high cleaning power, is described in European patent application 76 563. In both specifications, it is pointed out that the constituent pastes of the carrier strand and the stripe should have the same rheological properties. Further examples of striped toothpastes can be found in DE-OSS 16 17 907 and 24 54 136.
Striped toothpaste strands are normally produced by the two pastes of the carrier strand and the stripe being dispensed simultaneously when pressure is applied to the storage container. The desired appearance of the toothpaste strand is determined by corresponding design of the outlet opening of the storage container. Information on the filling of corresponding toothpaste tubes and on the configuration of the outlet opening of those tubes can be found, for example, in DE-PS 11 85 981 or GB-PS 813, 514.
Known striped toothpastes have a substantially circular and generally unstable strand cross-section. In addition, a diffuse transition is often formed between the carrier strand and the stripe.
This transition zone should be eliminated to enhance the aesthetic appearance of the strand. In addition, there is a need for toothpaste strands of polygonal cross-section which have an improved hold on toothbrushes. This is of particular interest when the toothbrushes are used by children. The stripes of different color may be situated at the corners of such a strand of toothpaste.
To this end, the constituent pastes of the carrier strand and the stripe should be coordinated with one another in such a way that they can be dispensed synchronously and uniformly from a container, the stripe paste being intended in particular to form the corner edges of a polygonal toothpaste strand.
In addition, there is a need for a device which enables the two coordinated phases of the toothpaste to be synchronously and uniformly dispensed.
DESCRIPTION OF THE INVENTION
Objects of the Invention
It has now surprisingly been found that the problem can be solved by formulating the constituent pastes of the carrier strand and the stripe in such a way that they differ specifically from one another in certain rheological parameters.
Accordingly, the present invention relates to a toothpaste to be dispensed from a container in the form of a multicolored, striped strand, consisting of a carrier strand paste and at least one stripe paste differing in color from the carrier strand paste, characterized in that the ratio between the yield points of the carrier strand paste and the stripe paste is approximately 1.10:1 to 1.20:1.
Toothpastes normally show the rheological behavior of non-newtonian liquids. When a shear stress below a value kno
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U.S.P.T.O. Translation of German DE 1185981 Sep. 16 1965 (Evans) (6 pages).
Bernard Idson, Ph. D., "Rheology: Fundamental Concepts", Cosmetics and Toiletries, vol. 93, Jul. 1978, pp. 23-30.
Fiedler Juergen
Foerg Franz
Kornettka Norbert
Stoeffler Albert
Henkel Kommanditgeselschaft auf Aktien
Jaeschke Wayne C.
Millson Jr. Henry E.
Rose Shep K.
Wisdom, Jr. Norvell E.
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