DE2927006A1 - Water-soluble removable stamping ink compsn. - contg. reducible dye, opt. non-reducible dye and pref. solubiliser, stabiliser and reduction accelerator - Google Patents

Abstract

Water-soluble, non-drying stamping inks, for stamping pads and permanent stamps, contain reducible dyes. Inks, contg. dyes undergoing colour changes with reducing agents, pref. contain a reducible and a non-reducible dye. The inks pref. also contain (i) solubilisers for the dyes, (ii) organic acids, inorganic acids and/or acid salts for stabilising the reducing dye and (iii) inorganic salts to increase reduction rate on using standard deleting pencils contg. reducing agents. The inks can be washed out and wiped off with water from hands, porous and smooth surfaces and textiles.

Description

Kreuzer-Werk GmbH
5 300 Bonn

Water-soluble, reducible stamp inks

The invention relates to water-soluble, reducible stamp inks, with which color reaction effects can be achieved.

Known stamp inks have the disadvantage that they usually are not water soluble and thus soiled areas on smooth and porous surfaces are difficult to remove. The reason for the insolubility in water lies in the use of oil-soluble dyes and pigments in the usual stamp inks. The disadvantage of the difficulty in removing customary stamp inks is particularly disadvantageous in the area of stamp games and stamp motifs for children's stamps.

The invention relates to those described in the claims water-soluble, reducible stamp inks.

The stamp inks according to the invention show the disadvantages more commonly Not stamp inks and can be easily removed from hands, porous and smooth surfaces and textiles. The easy It can be removed by using water or substances with a reducing effect, especially those that are customary in the trade Reducing solutions used in eraser pens.

The stamp inks according to the invention show when using the common ink erase pens color reactions caused by a combination of reducible dyes and non-reducible dyes be achieved. The color mixture resulting from the combination of the dyes changes when reducing agents are used in the direction of the color of the non-reducible dye.

030062 / (HSS

2927008

Thus it is possible to use one stamp color and one stamp imprint create two-tone motifs by using ink erase pens. This color effect is particularly common in children Interest, for the purpose of educational games, games and fun and decoration of everyday objects of all kinds, as well as decorations, which should be removed again after a certain period of time.

As reducing agents for those which can be used according to the invention, reducible ones Dyes can be used with conventional reducing agents such as those used for ink erase pens. For example Sulphite solutions can be used as reducing agents.

The stamp inks according to the invention contain reducible and non-reducible dyes in mixtures of glycerine and polyethylene glycols. The stamp inks contain solubilizers for dyes based on high-quality, long-chain alcohols or pyrrolidone derivatives.

To stabilize the reducible dyes against fading of the reducible dyes, the stamp inks are inorganic or organic acids or acidic salts are added.

To increase the reduction speed when using ink erase pens the stamp inks according to the invention are inorganic Salts added.

The following is an example of a possible formulation according to the invention specified:

Reducible dyes 1-4% by weight

non-reducible dyes 1-2% by weight

Glycerine 10-30% by weight

Polyethylene glycols 30 - 60% by weight

Solubilizers , e.g. B. long-chain, polyhydric alcohols with 4-10 carbon atoms or pyrrolidones - 1 - 3% by weight

Stabilizers, e.g. B. organic

or inorganic acids 1 - 2% by weight

Reduction accelerators, e.g. B., ^ _ _& inorganic salts such as magnesium chloride, calcium chloride, potassium sulfate

030062/0455

The following dyes, in particular, can be used as reducible dyes in milling cutter basacrylic dyes from BASF, duasynic acid and ink-based substances from Hoechst and Bayer.

All dyes come into consideration as non-reducible dyes, the i in the office, paper and stationery industry usual oind.

In the following there are some special recipe examples for explanation of the invention listed. Unless otherwise stated, all parts are based on weight.

example 1

Blue stamp l color

55 parts of pol / ethylene glycol molecular weight 400 35 parts of 85% glycerine
2 parts of tartaric acid, crystallized
4 parts of magnesium sulfate
4 parts reducible, water-soluble blue dye, e.g. B.

Tinr.enblau BJTN (Hoechst, CJ- Acid Blue 93, 42780) or Duasynic acid blue VF-UF (Hoechst, CJ. Acid Blue 1,42045).

A stamp of this color can be made with sulphite solutions, as they are contained in common ink erase pens.

Example 2
Red

As described in Example 1, the dyes used are Basacryl Brilliant Red X4G conc (BASF, CJ Basic Red 14; or Astrarot 3 G 125% (Bayer, CJ. Basic Red 28) or Sandozylbri! ¹ lantern red BL4G

for use. With sulfite solutions a discoloration takes place Imprint of this stamp color.

030052 / 0AS5

Example 3 Green stamp ink

As described in example 1. Come as dyes Malachite green 3χΝ (BASF) or

Astramalachite green N {Bayer, CJ. Basic Green 4) or Remacrylgrün 3B (Hoechst, CJ. Basic Green 4, 42000) for use. An imprint of this stamp ink is decolorized with sulfite solutions.

Example 4 Black stamp ink

As described in example 1. A mixture comes out as dyes

1 part Basacryl Brilliant Red X4R (BASF) 4 parts Remacryl Green 3B (Hoechst

1.8 parts of Basacryl Yellow X-RL (BASF, CJ. Basic Yellow 49) and 1 part of Basacryl Blue X-3GL {BASF, CJ. Blue 41) is used.

An imprint of this stamp color is decolorized with sulfite solutions.

Example 5

Stamp ink, the imprints of which after the application of sulphite solutions result in a color change from blue to turquoise.

As described in example 1. Duasynic acid blue VF-UF or ink blue BJTN comes as a reducible dye and as a non-reducible one Dye special violet S4BNS (Bayer) for use.

Example 6

Stamp ink, the imprints of which after the application of sulphite solutions result in a color change from red to yellow. As described in example 1.

030062/0455

Special crocein MOOS (Bayer) and special " Orange GX (Bayer) used.

Example 7

Stamp ink, the imprints of which show a color change from black to green after the application of sulphite solutions.

As described in example 1. There is a mixture of dyes the end

Special violet S4BNS (Bayer) Duasynic acid blue VF-UF (Hoechst) Special crocein MOSS (Bayer)

Special yellow S (Bayer) is used.

A solution of 80 parts of water is used as the bleaching liquid 20 parts of glycol 1 part of polyethylene glycol MG 3 parts of 3% sodium hydroxide solution 8 parts of sodium pyrosulfite 5 parts of Na / K tartrate

030062/0455

Claims (6)

Kreuzer-Werk GmbH., Rochusstrasse 2, 5 300 Bonn St. rer. call. D'-ZT-K LOUJS ^ f ^ CLAIiS VGHLAU ^ pUr.g.RA. ^ ZLOi-f.nasiT? 19 850G -N C? R N BE RG KEJSLEXPLAT 1 claims 1. Water-soluble, non-drying stamp inks for Ink pads and permanent stamps containing reducible Dyes. 2. Water-soluble , non-drying stamp inks for stamp pads and permanent stamps according to claim 1, the colors of which result in color changes due to reducing agents, containing a reducible and a non-reducible dye. 3. Stamp inks according to claim 1 or 2, which are washable and can be wiped off with water. 4. stamping inks according to any one of claims 1-3, containing Solubilizer for the corresponding dyes. 5. Stamp inks according to one of claims 1-4, the additives of organic acids, inorganic acids and / or acidic salts to stabilize the reducing dyes. 6. Stamp inks according to any one of claims 1-5, containing inorganic salts to increase the rate of reduction when using reducing agents in conventional erasing pens. 030062 / iHSS