DE2238332A1 - TOOTHPASTE - Google Patents

Description

Blendax works

65 Mainz . .

Rheinallee 88

toothpaste

The invention is a toothpaste in its Basic mass contains a proportion of particles that are in color contrast to the basic mass. Such toothpastes, also known as "speckled toothpastes", are popular with consumers increasing popularity and are also already in the trade, for example in the United States under the name "Gleem" offered.

Thereby, as colored, to the toothpaste base mass in Contrasting particles, preferably finely divided colored resins are used (see, for example, DT-OS 2 o3l 675). This has the disadvantage that, since these ground resins become visible as particles in the toothpaste base must have a certain particle size, on the one hand a strong, the tooth enamel attacking abrasion arises during use, and on the other hand these particles due to their size after brushing their teeth in the interdental spaces get stuck and thus create an uncomfortable feeling in the mouth.

In addition, colored plastics tend to when used with come into contact with the toothpaste base, especially in contact with the flavoring substances present there "Bleeding" of the paint, whereby the desired effect is lost.

From the German Offenlegungsschrift 2 o3l 676, speckled toothpastes are also known that are contained in a toothpaste base evenly distributed agglomerates of pigment particles with waxes and gels having an average particle size of about 2oo to 5oo microns of a color appropriate to

, 409807/1095

that of the matrix is in contrast. However, these color particles also have the disadvantage not to disintegrate quickly enough when using the toothpaste and therefore into the interdental spaces to wander and leave an uncomfortable feeling there after using the toothpaste.

It has now been found that you can speckled toothpastes in a toothpaste base in color to this in Containing contrasting, clearly visible particles can produce which do not have these disadvantages described above have, if the colored particles are microcapsules with an average particle size of about 100 to about 500 Micron used in which a solution or suspension of dyes in a physiologically inert solvent, in particular Paraffin oil was encapsulated. These particles give the toothpaste the desired mottled color effect, disintegrate immediately when brushing your teeth, without being used for this purpose as was previously the case To be able to fix particles in the interdental spaces.

The preparation of this one dye solution or suspension in a physiologically inert solvent, in particular microcapsules containing paraffin oil, is carried out according to the known, particularly those encapsulation methods described by the National Cash Register Co., preferably by coacervation. It has proven to be advantageous to put the pigment solution or suspension in a physiologically inert solvent, In particular, paraffin oil can still be added to the usual flavorings and aromas in toothpastes, and these in themselves known way with microencapsulation. Such flavorings are, for example, menthol, peppermint oil, Spearmint oil, wintergreen oil or chloroform.

The capsule wall material used to manufacture the microcapsules must be transparent. Gelatine has proven to be particularly suitable, but any other is also possible transparent material proposed and tested for microencapsulation, for example polyvinyl alcohol, or Cellulose derivatives such as hydroxyalkyl celluloses are suitable for this purpose. 409807/1095

As a toothpaste base, the 'usual for this Purpose known bases in paste or gel form Base of a polishing agent, a binding or thickening agent, a humectant and water are used.

For example, it is possible to use colored gel bases, as can be achieved, for example, by using silica xerogels and aerogels: a particle size from about .3 to 15 microns and a surface area of

2
about 25o to about 85o m / g is obtained, whereby in interaction with the different colored particles, optically very beautiful contrasts are obtained «

The toothpastes according to the invention can. Die usual in Substances to be used with these agents, such as enzymes, fluorine compounds, flavor corrections, preservatives, Contains surfactants, etc.

Βίε Dyes that are microencapsulated in a form dissolved or suspended in paraffin oil are, for example, C-red, 1, C-red 2, C-red 3, C-red 8, C-red 12, C-red 13, C-red 14, C-Red 27, C-Red 28, C-Red 29 _f C-Red 34, C-Red 35, C-Red 38, C-Red 41, C-Red 55, C-Red 56, C-Violet 9, C-Blue 16, C-Blue 17, C-Blue 18, C-Green 7, C-Green 8, C-Green 9, C-Green are suitable. The exact chemical names of these dyes can be found in the communications of the dye commission of the German Research Foundation, Communication 3, 2nd edition (November 21, 1959, Franz Steiner Verlag GmbH, Wiesbaden). '

Also well suited for the purpose according to the invention are those so-called "alumina trihydrate varnishes" are more water-soluble Food colors and water-soluble C-colors.

The following are some exemplary embodiments for it speckled toothpastes according to the invention given; the on given figures all relate to weight * Percentages.

example 1

0.5o% carbaximethyl cellulose 4o, oo% glycerine, 99.5% strength o, Io% saccharin sodium o, Io% p-oxybenzoic acid methyl ester 2, oo% Aerosil (finely divided silicon dioxide) 4o, oo%. Calcium carbonate 1. 3o% flavoring 1. 6o% sodium lauryl sulphate

o, 75% microcapsules with a particle size of 2oo 4oo microns, which contain a solution of ORot 55 in paraffin oil

13.65% water

Example 2

3o, oo% glycerine, 99.51 ig

36, oo I sorbitol, 7o%

3, oo% polyglycol 400

o, 3o I carboxymethyl cellulose

o, Io% saccharin sodium

o, Io I p-Oxybenzoic acid methyl ester

22, oo% Syloid 7o (silicon dioxide xerogel, small particle size 6 microns, surface area 2 $ o no / g)

2, oo t Sodium Lauryl Sulphate 1,2o I Flavorings

l, oo% microencapsulated solution of C-Green Io in paraffin oil, with ti. Particle diameter 400 microns

4.40% water

40980 7/1095

Example 3

"IfOO% carboxymethyl cellulose 25,000% glycerine, 99.5%

Ti

2.60% Aerosil (finely divided silicon dioxide) 35,000% dicalcium phosphate dihydrate OfIo% saccharin sodium ο, Io% p-oxybenzoic acid methyl ester =. lflo% flavors'

I, 80% sodium lauryl sulfate

o.75 "microencapsulated 10% suspension of C blue in paraffin oil, mean particle size 45o microns

32f55% water

Example 4

1.00% methyl cellulose, lOfOO% glycerin 43fOO% calcium carbonate IfOO% flavoring substances OfIo% saccharin sodium ο, 60% sodium lauroyl sarcosinate OfIo% p-oxybenzoic acid methyl ester.

ο, 75% microencapsulated solution of Pigment Red in paraffin oil, particle size 25o-45o microns

43f45% water

AO9807 / 1095

Claims (4)

Blendax works R. Schneider & Co. Mainz .,. * _- Rheinallee 88 Claims Jl) toothpaste that contrasts with its base material in color contains standing particles / characterized in that these particles consist of microcapsules made of a transparent Wall material with an encapsulated suspension or solution of dyes in a physiologically inert Solvent, especially paraffin oil. 2. Toothpaste according to claim 1, characterized in that in the microcapsules in addition to a solution or suspension a dye in a physiologically internal solvent, in particular paraffin oil Aroma or flavor is included. 3. Toothpaste according to claim 1 and / or 2, characterized in that the transparent wall material of the microcapsules consists of gelatin. 4. Toothpaste according to any one of the preceding claims, characterized in that it is to its basic mass in colored contrasting particles in an amount of ■ contains about 0.1 to about 10 wt.% Of the total composition. 409807/1095