DE1088518B - Process for making rubber prints - Google Patents

Description

GERMAN

The invention relates to a process for the production of rubber prints with basic dyes. The process is characterized in that an alcoholic or aqueous alcoholic solution of the basic dyes is used for printing turns that from oxydiarylsulphone and aromatic Oxycarboxylic acids or aryloxy fatty acids produced by means of formaldehyde in condensation products Contains form of free acids.

Suitable condensation products are in particular those obtained from 4,4'-dioxydiphenylsulfone and salicylic acid by means of formaldehyde according to processes known per se · - · z. B. according to the procedure of the German Patent specification 693 770 - are available, the proportions between the aromatic components can be different within wide limits. For the implementation of the method according to the invention Required amounts of condensation products depend on the nature of the basic dyes away; they can easily be determined from case to case by means of preliminary tests.

The process according to the invention permits the use of relatively small amounts of condensation products to produce rubber prints on paper, metal foils or plastic foils, for example, which are excellently fixed. In addition, neither in performing the procedure nor join the use of the printed materials on odor nuisance. These benefits are in use the previously known fixatives are not given to the same extent.

The parts given in the following examples are parts by weight.

Method of manufacture
of rubber prints

example 1

15 parts of one from 250 parts of 4,4'-dioxydiphenyl sulfone and 276 parts of salicylic acid with 200 parts of formaldehyde in the presence of 27 parts of concentrated Sulfuric acid produced condensation product are in a mixture of 70 parts Ethyl alcohol and 5 parts of ethyl glycol dissolved and then with 10 parts of dye no. 930 from Schultz, Dye Tables, 7th Edition, Vol. I, offset. The clear dye solution then becomes paper printed on the rubber printing machine. The prints obtained are completely odorless. The dye is fixed well waterproof, and the print is real to paraffin and fats.

"Instead of the 15 parts of the condensation product listed above you can also use one of the following condensation products in the amounts given with the same success: a) 15 parts of the condensation product, which consists of 250 parts of 4,4'-dioxydiphenylsulfone and 552 parts Applicant:

Paint factories Bayer Aktiengesellschaft, Leverkusen-Bayerwerk

Dr. Helmut Meier and Dr. Martin Meister, Leverkusen, have been named as the inventor

Salicylic acid with 400 parts of formaldehyde in the presence of 48 parts of concentrated hydrochloric acid is made.

b) 15 parts of the condensation product, which is ^{prepared from 250 parts of 4,4 /} -dioxydiphenylsulfone and 69 parts of salicylic acid with 100 parts of formaldehyde in the presence of 10 parts of p-toluenesulfonic acid.

c) 15 parts of the condensation product, which consists of 250 parts of 4,4'-dioxydiphenylsulfone and 276 parts 4-oxybenzoic acid or 276 parts of a mixture of 2- and 4-oxybenzoic acid with 200 parts of formaldehyde is made in the presence of 27 parts of concentrated sulfuric acid.

e) 10 parts of one of the condensation products listed above and 10 parts of an alcohol soluble resin, e.g. B. a cyclohexanone-formaldehyde resin.

In place of the dye no. 930 from Schultz, op. a. O., you can also use other basic dyes, z. B. Dye No. 752, No. 760 or No. 822 from Schultz, loc. Cit.

You can also use ethyl cellulose in addition to the above approaches add and in this way a deeper hue and a stronger adhesive strength of the Achieve pressure.

Example 2

In a mixture of 58 parts of ethyl alcohol and 5 parts of ethyl glycol are first 10 parts of a the condensation products listed in Example 1, 10 parts of an alcohol-soluble cyclohexanone-formaldehyde resin, 5 parts of an alcohol-soluble oil-modified alkyd resin and 2 parts of ethyl cellulose dissolved. Then 10 parts of a solution are added to the solution

009 590/147

the basic dyes listed in Example 1 were added.

With the clear solution prepared in this way, aluminum foils are then printed on the rubber printing machine. The print obtained is odorless, the dye is well fixed and resistant to fats and paraffins and grow real. The adhesion and friction resistance of the print on the film is also good.

Instead of the aluminum foil, foils made of cellulose hydrate, polyethylene or the like can also be printed will.

Claims (1)

Claim: Process for the production of rubber prints with basic dyes, characterized in that that an alcoholic or aqueous-alcoholic solution of the basic dyes is used for printing used, those from oxydiarylsulfones and aromatic oxycarboxylic acids or aryloxy fatty acids Contains condensation products produced by means of formaldehyde in the form of the free acids.