DE4229555C2 - Mint-shaped paint body for painting purposes and process for its preparation - Google Patents

Description

The present invention relates to a minine Color bodies for painting purposes with colorants, fillers, binders and fats, oils and / or waxes.

Color mines consist of colorants, fillers, binders and optionally fats, oils and / or waxes, wherein the latter should improve the lubricating properties of the mine sol len. Due to the field of application for crayons, the most of the application is done in kindergarten and pre school age, one is on the part of the crayon producers be strives to know what the ingredients and especially the (often containing heavy metals) colorant completely harmless substances for mine production too use. In this context, when applying of the products the reference "CE" used, which for the Conformity of the product with the Euro-Norm 71, the in Part 3 defines a certain limit of heavy metal contents. In view of the increasingly fierce competition one strives, ever higher demands on these To provide safety information. The one colored pencil producer, which one compared to competing products increased safety, therefore has created a significant advertising effect for his crayons.

DE-OS 34 21 408 A1 discloses a refill for writing, marking or character purposes known in the form of a solid mine,  which colorants, fillers, binders as well Fats or waxes included. To ensure a fluorescent Order will be called colorant pigments or Dyes in the form of more soluble in solid solutions Dyes (for example water-insoluble lacquers of organic dyes) used.

The object of the present invention is to provide a to provide novel color bodies whose Colorants are completely harmless but at the same time performance properties of the color body not be worsened.  

This object is achieved by the characterizing part of Claim 1 solved. Thereafter, the invention is there by that the colorant exclusively from the Be rich in the usual use in solution Le Bensmittelsfarbstoffe is selected in the application However, the color lead was dispersed "atypically", as it were available. Food colors which normally (eg. for coloring ice cream or the like) dissolved before Accordingly, are in the claimed here verwen used in the dispersed state so undissolved. As a result, many dyes from the field of so-called. "Food additives" of the claimed application accessible. The term "food additive" is a officially used term, a list of those in Germany approved food additives can be found in the Bun desanzeiger vintage 44, no. 142a. Food Additives are marked with a number that is either an E (final EEC number) or a C (number for certain Dyes) is prefixed. For numbers without preceding Letters E or C are provisional EEC numbers.

So far, the great prejudice of the industry was that for the production of z. B. color mines to be used Colorants exclusively in the field of color pigments have been selected which unge in the application state is present. The inventor now surprisingly found that for the preparation of the novel color mine also Colorants from the range of the usual application in Solution of existing food colorants are usable, wherein these in the application state of the invention However, color must be present dispersed. This He Knowledge offers the opportunity to many in the group of Food additives existing colorants of the Making production of color mines accessible.  

The inventive use of food dyes as a colorant for color leads for painting or cosmetic purposes now justifies the possibility of this effect promotional use, in which the use of Colorants "consisting solely of Food dyes "can be pointed out. Surprisingly, it has been found that the use the food colorants to no appreciable Impairment of the mechanical application of the new Color lead leads. Further expedient embodiments of Invention are described in the subclaims.

The coloring agent does not necessarily have to consist of a single one Food coloring exist, it can rather also from a mixture of at least two food colors be built, but it is important that exclusively Food dyes find use.

The ph value of the prepared mixture in a range of 5.5-7.5 is expedient in that a chemical change of food colors and this avoids changes in the color effect or be.

Particularly advantageous in this context is a Be rich in ph value between 6.5 and 7.5.  

In the pH range to be observed are only certain Fats, waxes or oils provided. For the present Be rich it is stearic acid, beeswax, Candelilla wax or carnauba wax. There is also one still the possibility of using oil obtained from oil mi cristalline waxes z. B. with the name "Permulgin 3230 "and the EEC number 907, which is an elevated paraffin share.

The inventor has found that good technical properties in connection with the exclusive use of addition of food additives should take place when the Filler content is in a range of 55-75 wt.%, the binder content in a range of 2.5-7.5 wt.%, the proportion of colorants in a range of 2.3-6.4 % By weight and the proportion of fat, oil or wax absolutely in egg A range of 10-17 wt.% Is.

Optimal properties such as opacity, mechanical Fe Stability and pointed behavior are caused by a mixture ensures that the filler content in one area of 60-70 wt.%, The proportion of binder in one Range of 4-6 wt.%, The colorant content in a Be range from 3.4-5.1 wt.% And the proportion of fat, oil or Wax between 12 and 14 wt.% Is.

As a colorant is at least one colorant from the Group Tartrazine 102, yellow orange S 110, quinoline yellow 104, Bixin, Norbixin 160b, Cochenillerot A 124, Azorubin 122, Erythrosine 127, Amaranth 123, Karmin 120, Patent Blue V 131, Brilliant Black BN 141 used. This results especially good physical properties such. B. opacity, luminosity, etc. at the same time to be set in a satisfactory manner mechanical stability, abrasion intensity, etc. of the mine.

In particular, waxes can also be used according to the invention use vegetable waxes, which in turn is an essential  Chen advertising effect over known crayons with it brings.

As for the preparation of the inventive As regards paint mine, care must be taken that the maximum Temperature during mixing 95 ° C, preferably 90 ° C not exceeds, so that a negative impact on the color tel is avoided.

For the same reason, the residence time of the mixture in the mixer no longer than 60 min. be different if also a negative influence on the colorants can be done.

In order to keep the residence time as short as possible, the Wed expediently an intensive or Used turbulent mixer.

Subsequently, the shaping of the raw material mixture takes place in the usual way z. B. in the extrusion process.

Then the formed mines are dried, with a Tem temperature of 40 ° C should not be exceeded.

To enter at this relatively low drying temperature sufficient drying of the lead blank to ensure should, the residence time during drying in one Range of 10-20 hours at min. 30 ° C, max. 60 ° C Drying temperature are.

Below are listed by trade name, name in the official list of sites and EEC number the most important Food additives for crayon mines.

Below are three recipe examples for crayon mines the colors Berlin blue (Formulation A), Orangedunkel (Recipe B) and light green (Recipe C) reproduced.

Recipe A - Talc SM | 71.10% - calcium stearate 5.20% - Tylose MH 300 P 5.00% - Sicovit Patent Blue 80 4.00% - Permulgin 1550 2.50% - Permulgin 3240 2.50% - Permulgin 3430 2.50% - Stearin 6.20%

Recipe B - Kaolin SB | 65,50% - calcium stearate 6.20% - Tylose MH 50 5.00% - Unibix O 97% 9.60% - Beeswax natural yellow 2.50% - Permulgin 3230 2.50% - Permulgin 3430 2.50% - Stearin 6.20%

Recipe C - China Clay B | 71.04% - magnesium stearate 6.20% - Tylose C 300 P 5.00% - Sicovit Patent Blue 80 0.56% - Sicovit quinoline yellow 70 3.50% - Beeswax natural yellow 2.50% - Permulgin 3230 2.50% - Isco-Care 100 2.50% - Stearin 6.20% (% In wt .-%)

Claims (7)

1. Mint-shaped color body for painting purposes with colorants, fillers, binders and fats, oils and / or waxes,
characterized,

• a) the colorant is selected exclusively from the range of food colorants present in solution under normal use,
• b) the food colorants dispersed in the application state of the color body, however.

2. Color body according to claim 1, characterized, that the colorant from a mixture of several food dyes consists. 3. color body after at least one of the preceding Claims, characterized, that the pH of the prepared mixture of ingredients for the production of the color body in one Range of 5.5-7.5.   4. color body after at least one of the preceding Claims, characterized, that as fatty, oil or wax stearic acid, bees wax, candelilla wax, carnauba wax or out Petroleum-derived microcrystalline wax with major portion Paraffin are provided. 5. color body according to at least one of claims 1-4, characterized, that the filler content in a range of 55-75 Wt .-%, the binder content in a range from 2.5 to 7.5% by weight, the proportion of Colorant in a range of 2.3-6.4 wt.% And the proportion of fat, oil or wax in an area from 10-17% by weight. 6. color body after at least one of the preceding Claims, characterized, that the color body is formed as a chalk. 7. Process for the preparation of the color body according to Claims 1-6, wherein the raw materials in each  initially known mixed first, then molded and then dried, characterized, that the maximum temperature during the mixing process 90 ° C. does not exceed the residence time of the mixture in the Mixer not longer than 60 min. is and the maximum temperature when drying the molded Color body is 60 ° C.